MCS 2000 VHF 25W Mobile MCS2000/MCS2000 Service Manual Vol 2g 6881080C48 O MCS2000

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MCS 2000 Mobile Radio
Service Instructions
Volume 2g
VHF Frequency Range, 25W Specific

 1998 by Motorola, Inc., Radio Network Solutions Group
8000 West Sunrise Boulevard
Ft. Lauderdale, FL 33322
All rights reserved.
68P81080C48-O, Issued 12/98

Safety Information

Every radio, when transmitting, radiates energy into the atmosphere which
may, under certain conditions, cause the generation of a spark.
All users of vehicles fitted with radios should be aware of the following
warnings:
Do not operate radio near flammable liquids or in the vicinity of explosive
devices.
To ensure personal safety, please observe the following simple rules:
Check the laws and regulations on the use of two-way mobile radios in the
areas where you drive. Always obey them. Also, when using your radio while
driving, please:
• Give full attention to driving,
• Use hands-free operation, if available and
• Pull off the road and park before making or answering a call if driving
conditions so require.

Airbag
Warning

VEHICLES EQUIPPED WITH AIR BAGS
An air bag inflates with great force. DO NOT place objects, including
communication equipment, in the area over the air bag or in the air bag
deployment area. If the communication equipment is improperly
installed and the air bag inflates, this could cause serious injury.

Installation of vehicle communication equipment should be performed by a
professional installer/technician qualified in the requirements for such
installations.
An air bag’s size, shape and deployment area can vary by vehicle make, model
and front compartment configuration (e.g., bench seat vs. bucket seats).
Contact the vehicle manufacturer’s corporate headquarters, if necessary, for
specific air bag information for the vehicle make, model and front
compartment configuration involved in your communication equipment
installation.

LP Gas
Warning

It is mandatory that radios installed in vehicles fuelled by liquefied petroleum
gas conform to the National Fire Protection Association standard NFPA 58,
which applies to vehicles with a liquid propane (LP) gas container in the trunk
or other sealed off space within the interior of the vehicle. The NFPA58
requires the following:
• Any space containing radio equipment shall be isolated by a seal from the

Safety 0

space in which the LP gas container and its fittings are located.
• Removable (outside) filling connections shall be used.
• The container space shall be vented to the outside.

Anti-Lock Braking System (ABS) and
Anti-Skid Braking System Precautions

!
WARNING

Disruption of the anti-skid/anti-lock braking system by the radio
transmitter may result in unexpected vehicle motion.
Motorola recommends the following radio installation precautions and
vehicle braking system test procedures to ensure that the radio, when
transmitting, does not interfere with operation of the vehicle braking system.

Installation Precautions
1.

Always provide as much distance as possible between braking modulator
unit and radio, and between braking modulator unit and radio antenna
and associated antenna transmission line. Before installing radio,
determine location of braking modulator unit in vehicle. Depending on
make and model of vehicle, braking modulator unit may be located in
trunk, under dashboard, in engine compartment, or in some other cargo
area. If you cannot determine location of braking modulator unit, refer
to vehicle service manual or contact a dealer for the particular make of
vehicle.

2.

If braking modulator unit is located on left side of the vehicle, install
radio on right side of vehicle, and conversely.

3.

Route all radio wiring including antenna transmission line as far away as
possible from braking modulator unit and associated braking system
wiring.

4.

Never activate radio transmitter while vehicle is in motion and vehicle
trunk lid is open.

Braking System Tests
The following procedure checks for the most common types of interference
that may be caused to vehicle braking system by a radio transmitter.

Safety 1

1.

Run vehicle engine at idle speed and set vehicle transmission selector to
PARK. Release brake pedal completely and key radio transmitter. Verify
that there are no unusual effects (visual or audible) to vehicle lights or
other electrical equipment and accessories while microphone is NOT
being spoken into.

2.

Repeat step 1. except do so while microphone IS being spoken into.

3.

Press vehicle brake pedal slightly just enough to light vehicle brake
light(s). Then repeat step 1. and step 2.

4.

Press the vehicle brake pedal firmly and repeat step 1. and step 2.

5.

Ensure that there is a minimum of two vehicle lengths between front of
vehicle and any object in vehicle’s forward path. Then, set vehicle

transmission selector to DRIVE. Press brake pedal just far enough to stop
vehicle motion completely. Key radio transmitter. Verify that vehicle
does not start to move while microphone is NOT being spoken into.
6.

Repeat step 5. except do so while microphone IS being spoken into.

7.

Release brake pedal completely and accelerate vehicle to a speed between
15 and 25 miles/25 and 40 kilometers per hour. Ensure that a minimum
of two vehicle lengths is maintained between front of vehicle and any
object in vehicle’s forward path. Have another person key radio
transmitter and verify that vehicle can be braked normally to a moderate
stop while microphone is NOT being spoken into.

8.

Repeat step 7. except do so while microphone IS being spoken into.

9.

Release brake pedal completely and accelerate vehicle to a speed of 20
miles/30 kilometers per hour. Ensure that a minimum of two vehicle
lengths is maintained between front of vehicle and any object in
vehicle’s forward path. Have another person key radio transmitter and
verify that vehicle can be braked properly to a sudden (panic) stop while
microphone is NOT being spoken into.

10. Repeat step 9. except do so while microphone IS being spoken into.
11. Repeat step 9. and step 10. except use a vehicle speed of 30 miles/50
kilometers per hour.

Safety 2

LIST OF EFFECTIVE PAGES
MCS 2000 Mobile Radio Service Instructions
Volume 2g
VHF Frequency Range, 25W Specific Information
Motorola Publication Number 68P81080C48-O

Issue Dates of Original and Revised Pages are:
Revision O: December1998

The Number of pages in this publication is 50 consisting of the
following:
Page Number

Revision Letter

Page Number

Revision Letter

Front cover

O

1 through 36

O

Inside front cover (blank)

O

Questionnaire (Front)

O

Title

O

Questionnaire (Back)

O

Safety 0 through
Safety 2

O

Inside Back Cover
(Replacement Parts
Ordering)

C

A and B

O

Back Cover (Not
Marked with Revision
Letter

O

i and ii

O

Note: The letter O in the Revision Letter column of the table above denotes an original page. Original pages
ARE NOT identified as such in the page footors except by the absence of a change letter and date.

List of Effective Pages

A

IMPORTANT
ELECTROMAGNETIC
EMISSION
INFORMATION

In August, 1996, The Federal Communications Commission (FCC)
adopted an updated safety standard for human exposure to radio
frequency electromagnetic energy emitted by FCC regulated
equipment. Motorola subscribes to this same updated safety standard
for the use of its products.
In keeping with sound installation practice and to maximize radiation
efficiency, a one-quarter (1/4) wave length antenna should be installed
at the center of the vehicle roof. If it is necessary to mount the
antenna on the vehicle's trunk lid, an appropriate 3db gain antenna
should be used. This installation procedure will assure that vehicle
occupants will be exposed to radio frequency energy levels lowerthan
the limits specified in the standard adopted by the FCC in General
Docket 79144.
To assure that radio frequency (RF) energy exposure to bystanders
external to a vehicle is lower than that recommended by FCC adopted
standard, transmit with any mobile radio only when bystanders are at
least two (2) feet away from a properly installed externally mounted
antenna for radios with less than 50 watts of output power, or three (3)
feet away for radios with 50 watts or greater power.
Control Station Operation
In the event of Control Station operation, to assure operators and
bystanders are exposed to radio frequency (RF) energy levels lower
than the limits specified in the FCC adopted standard, the antenna
should be installed outside of any building, but in no instance shall
the antenna be within two feet (less than 50 watts power output) or
within three feet (50 watts or higher power output) of station
operators or bystanders.

B

Table of Contents

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety 0
List of Effective Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A
Important Electromagnetic Emission Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
List of Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
1- Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2- Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram Level Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Receiver Detailed Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Receiver Front End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Receiver Intermediate Frequency (IF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Receiver Back End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Transmitter Detailed Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Synthesizer Detailed Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Overall PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
PA Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Controller Detailed Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dc Power Control and Regulation Detailed Functional Description. . . . . . . . . . . . . . . . . . . . . . . 14
4 - Reference Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table of Contents

i

List of Figures

Figure 1. Overall Radio Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Transceiver Board Section Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

List of Tables
Table 1. Schematic Diagram Interconnection List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Note: Reference drawings (component locations, schematic diagrams, and parts lists) are listed
on page15.

ii

List of Figures

1

Introduction

This publication (Service Manual Volume 2g, Motorola Publication
68P81080C48) provides frequency-range-specific information for the
25-Watt MCS 2000 radio that operates in the VHF frequency range
(136 to 174 MHz).
This publication is a companion volume to Service Manual Volume 1
for MCS 2000 Radios, Motorola Publication Number 68P81083C20,
which provides non-frequency-range-specific information for all MCS
2000 Radios. Service personnel must have both Volume 1 and Volume
2d of this Service Manual in order to have all service information for
the 25-Watt MCS 2000 Radio that operates in the VHF frequency
range.
There are other Volume 2 service manuals (e.g., Volume 2b, 2c, 2d,),
which cover models of the MCS 2000 Radio for other frequency ranges
and power levels. Refer to Volume 1 of this service manual for a list of
the manuals related to operation and maintenance of all models of the
MCS 2000 Radio, and the Motorola publication numbers for those
manuals.
Hereafter in this manual, the MCS 2000 Radio is referred to as the
radio. The specific hardware portions of the radio covered in this
volume of the service manual are as follows:
• Receiver Front End
• Receiver Intermediate Frequency (IF)
• Receiver Back End
• Power Amplifier
• Synthesizer
This volume (Volume 2g) of the service manual covers the following
four topics for the specific hardware portions of the VHF radio:
• Theory of operation
• Component locations
• Parts lists
• Schematic diagrams and associated interconnect information

Introduction

1

The four topics listed above for the controller section and for the
control heads are covered in Volume 1 of this service manual,
Motorola Publication Number 68P81083C20.
All the radios covered in this service manual contain a single circuit
card assembly (a printed circuit board with components mounted),
which is called the transceiver board.

2

Introduction

2

Theory of
Operation

This chapter provides theory of operation information for the radio. It
starts with a block diagram level functional description of the entire
radio. This is followed by a detailed functional description for each of
the four major functions of the radio.

Introduction

The radio is composed of the following five major functions:
• Receiver
• Transmitter
• Controller
• Dc Power Control and Regulation
• Operator Interface (Control Head)
The receiver, transmitter, controller, and dc power control and
regulation functions are all located on a single circuit card assembly
(CCA) in the main body of the radio. The CCA is called the transceiver
board. The operator interface function consists of the control head,
which plugs into the main body of the radio. There are three different
control head types: the Model I for the Model I Radio; the Model II for
the Model II Radio; and the Model III for the Model III Radio. The three
control heads are covered in their entirety in Volume 1 of this service
manual.
The transceiver board in the main body of the radio is physically
separated into six functional sections as follows:
• Receiver Front End
• Receiver Intermediate Frequency (IF)
• Receiver Back End
• Power Amplifier (PA)
• Synthesizer
• Controller
The controller section is further divided into two sub-sections: main
controller; and power control.
The mechanical layout of the transceiver board is illustrated in
Chapter 3.

Theory of Operation

3

Separate component location diagrams, parts lists, and schematic
diagrams are provided in this service manual for each of the six
physical sections of the transceiver board and for the control heads.
The component location diagrams, parts lists, and schematic diagrams
for the controller section of the transceiver board and for the three
types of control heads are located in Volume 1 of this service manual.
The component location diagrams, parts lists, and schematic diagrams
for the other five physical sections of the transceiver board are located
in this volume.

Block Diagram
Level Theory of
Operation

The following discussion refers to the functional block diagram for the
radio, Figure 1.
The receiver function of the radio detects, demodulates, amplifies, and
outputs via the loudspeaker, radio signals picked up by the vehicle or
fixed-station antenna. The radio signal input reaches the receiver from
the antenna via the antenna switch, which is located in the transmitter function of the radio. The radio signals picked up by the antenna
are signals that have been re-broadcast by trunked or conventional
repeaters, or that have been broadcast directly by other mobile or fixed
station radios.
The receiver function of the radio consists of: the receiver front end
section; the receiver intermediate frequency (IF) section; the receiver
back end section; and the audio signal filter (ASFIC) and receiver audio
power amplifier circuits in the controller section.
The receiver function of the radio uses the double conversion superheterodyne design to optimize image rejection and selectivity. The
receiver front end section converts the receiver input signal to a first
IF of 44.85 MHz. The frequency upon which the receiver operates is
determined by a first local oscillator signal generated by the synthesizer section. For the purpose of this discussion, the synthesizer section is
considered to be part of the transmitter function of the radio.
The 44.85 MHz IF output signal from the receiver front end section
passes through the receiver IF section where it is filtered and amplified.
The output of the receiver IF section goes to the receiver back end
section. In the receiver back end section, which contains the zero
intermediate frequency (ZIF) integrated circuit (IC), the receiver IF
signal is demodulated to produce receiver audio and squelch signals.
The receiver audio and squelch signal outputs from the receiver back
end section are processed by the audio signal filter integrated circuit
(ASFIC) in the controller section of the radio to generate receiver audio
(filtered) and squelch detect signals. The filtering characteristics and
other processes of the ASFIC are controlled by the central processor
unit in the controller section.
The receiver audio signal (filtered) from the output of the ASFIC goes
to the input of the receiver audio power amplifier circuit, which is
located in the controller section of the radio.

4

Theory of Operation

RECEIVER
P/O CONTROLLER SECTION (NOTE 1)
RECEIVE
RF SIGNAL

RECEIVER
FRONT END
SECTION

IF

RECEIVER IF
SECTION

FIRST
RECEIVER
LOCAL
OSCILLATOR

RECEIVER
BACK END
SECTION
(ZERO IF)

IF

RECEIVER
AUDIO
SQUELCH

AUDIO
SIGNAL
FILTER
(ASFIC)

RECEIVER
AUDIO

LOUDSPEAKER

RECEIVER
AUDIO
POWER
AMPLIFIER

AUDIO PA
ENABLE

2.1 MHz
REFERENCE
OSCILLATOR

RECEIVE RF SIGNAL

SQUELCH
DETECT

FIRST RECEIVER
LOCAL OSCILLATOR,
2.1 MHz
REFERENCE OSCILLATOR

TRANSMITTER
P/O CONTROLLER
SECTION
(NOTE 1)
AUDIO
SIGNAL
FILTER
(ASFIC)

ANTENNA

TRANSMITTER POWER AMPLIFIER SECTION

AUDIO
MODULATION
SIGNAL

SYNTHESIZER
SECTION

POWER
TRANSMIT
DETECTOR
RF POWER RF SIGNAL
AND
AMPLIFIER
ANTENNA
SWITCH

HARMONIC
FILTER

TRANSMITTER
INJECTION
SIGNAL

SERIAL
PERIPHERAL
INTERFACE
(SPI) BUS

P/O CONTROLLER
SECTION (NOTE 1)

FEEDBACK

MEMORY

MICROPHONE
AUDIO
2.1 MHz
REFERENCE
OSCILLATOR

ACCESSORY
INPUTS AND
OUTPUTS

CONTROL

RF
POWER
CONTROL

SB9600
DATA BUS

CENTRAL
PROCESSOR
UNIT (CPU)

AUDIO PA
ENABLE

SUPPORT
LOGIC
(SLIC)

OPERATOR INTERFACE (CONTROL HEAD - NOTE 2)

MICROPHONE

OPERATOR
KEYBOARD,
PUSHBUTTONS,
AND OTHER
CONTROLS

CONTROL HEAD
PROCESSOR

DISPLAY DATA

OPERATOR
DISPLAY

PUSH TO
TALK (PTT)

DC POWER CONTROL AND REGULATION

NOTES:
1. REFER TO VOLUME 1 OF THIS
SERVICE MANUAL FOR INFORMATION
ABOUT CONTROLLER SECTION.

P/O CONTROLLER SECTION
(NOTE 1)
13.8VDC
FROM VEHICLE
BATTERY OR
BASE STATION
POWER SUPPLY

CONTROL AND
REGULATION
CIRCUITS

REGULATED
DC POWER

2. REFER TO VOLUME 1 OF THIS
SERVICE MANUAL FOR INFORMATION
ABOUT CONTROL HEAD.

TO TRANSCEIVER BOARD AND
CONTROL HEAD CIRCUITS

MAEPF-26567-B

Figure 1 . Overall Radio Functional Block Diagram

Theory of Operation

5

The receiver audio power amplifier circuit does not pass the receiver
audio signal to the loudspeaker until it receives an audio PA enable
signal from the controller section of the radio. The reason is that the
receiver portion of the radio includes a squelch function, which
prevents receiver noise from passing to the loudspeaker during periods
of no signal reception.The controller generates the audio PA enable
signal based on such variables as the level of the received signal, the
frequency channel, and the operating mode of the radio. When the
audio PA enable signal is generated, the audio power amplifier (PA) is
activated and passes the receiver audio signal to the loudspeaker.
The transmitter function of the radio produces a nominal 25-Watt
radio frequency output signal. The radio frequency output signal is
frequency modulated by an audio signal from the microphone or from
another source such as a telephone keypad or handset.
The transmitter function of the radio consists of: the audio signalling
filter integrated circuit (ASFIC) in the controller section; the
synthesizer section; and the transmitter power amplifier (PA) section.
The ASFIC develops a modulation signal by amplifying an audio signal
from the microphone, keypad, or handset. The synthesizer section
generates a radio frequency carrier signal upon which the transmitter
portion of the radio operates.The radio frequency carrier signal
generated by the synthesizer section is frequency modulated in the
synthesizer section by the modulation signal output from the ASFIC.
The frequency modulated output signal from the synthesizer section
is amplified to the required nominal 25-Watt power level by the power
amplifier (PA) section.The output of the PA section passes through the
antenna switch and is radiated by the vehicle antenna or fixed-station
antenna.
The controller section of the radio contains a microprocessor that
controls the radio in accordance with its built in programming as well
as commands input manually by the radio operator. The radio
operator inputs manual commands to the controller section using the
pushbuttons and other controls located on the control head. In
addition to its controlling functions, the controller section provides
audio amplification of the audio output signal in the receiver
function. It also contains squelch detect circuitry based on a buffered
discriminator signal from the Zero Intermediate Frequency Integrated
Circuit (ZIF IC).
The operator interface function of the radio consists of: a microphone
or the microphone portion of a telephone handset; a telephone
keypad if used; the pushbuttons and other controls on the control
head; and the digital and graphics displays on the control head. The
pushbuttons and other controls on the control head provide digital
commands to the controller section, and in some instances, hardwired
commands to controlled circuits. The digital and graphics displays
receive display data from the controller section. The control head
contains its own microprocessor, which communicates with the
controller section of the radio via an SB9600 serial digital data bus.
The DC power control and regulation function regulates and
distributes to the various sections of the radio, DC power from the
vehicle battery or fixed station power supply.
6

Theory of Operation

Receiver
Detailed Functional
Description

The portion of the receiver function that is not part of the controller
section of the radio is composed of three main sections: receiver front
end; receiver intermediate frequency (IF), and receiver back end. The
receiver covers the VHF range from 136 to 174 MHz.

Receiver Front End

The following discussion is based on the schematic diagram for the
receiver front end section on page 19.

Varactor Tuned Bandpass Filter

A two pole filter tuned by dual varactor diode CR3302 preselects the
incoming receive signal at terminal IF10-3-1 to reduce spurious effects
to the stages that follow. The filter tuning voltage at terminal IF1-3-6,
which ranges from 2.5 VDC to 7.5 VDC, is controlled by a digital to
analog (D/A) converter integrated circuit in the controller section of
the radio. The filter has three bandstops: at approximately at 45 MHz
for the first IF; at 95 MHz for broadcast frequencies; and at the receive
frequency plus 50 MHz for the receiver local oscillator frequency. The
three bandstops improve receiver performance at those three specific
spurious signal frequencies.
In transmit mode, the input signal to the receiver front end is reduced
by PIN diode CR3330, which is part of the RX/TX switch in the power
amplifier section of the radio. A dual hot carrier diode (CR3303) limits
any in-band signal to 10 dBm to prevent damage to the receiver
preamplifier.

Preamplifier

The receiver preamplifier (Q3302) is a surface mount device (SMD),
which has emitter and collector base feedback to stabilize gain and
impedance, and minimize intermodulation distortion. To provide
optimum transistor current drain, Q3302 is actively biased by a
collector current sense circuit (Q3301 and associated components),
which in receive mode is also used to bias the receive series PIN diode
CR3641 (in the power amplifier section) via the decoupled emitter
path of Q3302.
The Q3302 collector current is set to approximately 22 mA at an
emitter voltage of about 2 volts. The combined preamplifier and PIN
diode bias circuit is driven by the keyed 9-Volt line (K9V1) from the
controller section of the radio.
To stabilize its output impedance, the preamplifier is followed by a
3 dB pad.

Fixed Tuned
Band-pass Filter

A five pole fixed tuned band-pass filter, with two bandstops (both at
approximately 220 MHz to suppress image frequencies), is included
after the preamplifier. The filter provides signal transmission over the
VHF range, wideband spurious signal suppression, and preamplifier to
mixer matching.

Mixer

Q3303 is a double balanced active Gallium Arsenide (GaAs) mixer. Its
three ports are matched for incoming VHF signal conversion to the
44.85 MHz IF using high-side injection. The mixer bias is set by R3341
to approximately 24 mA with Pinj (RX INJ) = 5 dBm.
The mixer IF output signal is fed through transformer T3303, where its
impedance is transformed to match the input impedance of the
receiver IF section.

Theory of Operation

7

Receiver Intermediate
Frequency (IF)

The following discussion is based on the schematic diagram for the
receiver IF section on page 21.

Intermediate Frequency
(IF) First Selection

To optimize half-IF stability, a diplexer shunt circuit (C3401, R3401,
L3401, C3402) matches the output impedance of the mixer in the
receiver front end section to the input of two pole crystal filter Y3401
at the input of the receiver IF section. The output of filter Y3401 is
matched to the following IF amplifier (Q3401).

IF Amplifier

IF amplifier Q3401 is a surface mount device of the same type as
preamplifier Q3302 in the receiver front end section. It is actively
biased by a collector base feedback circuit to a current drain of
approximately 10 mA. Its output voltage swing is limited by a dual hot
carrier diode (CR3402) to reduce overdrive effects at RF input signal
levels above 27 dBm.

IF second selection

IF amplifier Q3401 is followed by matching networks into and out of
the second crystal filter (Y3402). To optimize the filter pass band, a
certain amount of signal is coupled from the input to the output of the
filter to achieve a notch at the higher and lower adjacent channel. This
improves the adjacent channel selectivity.
The output from filter Y3402 is coupled via capacitor C3411 and
terminal 1F3-2-9 to the input of the receiver back end section.

Receiver Back End

The following discussion is based on the schematic diagram for the
receiver back end section on page 23.

Zero IF (ZIF) Isolation
Amplifier

To obtain proper operation of the ZIF IC (U3201) in the receiver back
end section, an isolation amplifier (Q3203) combined with an IF
automatic gain control (AGC) and a low-pass filter follows. The
collector path of Q3203 is loaded with a PIN diode (CR3203) in shunt
configuration. Its control voltage is generated by a bias circuit with
CR3204 in conjunction with the voltage out of U3201 pin 4
(U3201-4). This configuration provides a maximum AGC dynamic
range of 40 dB and isolates the sensitive ZIF IC from an overdriving IF
level. Additionally, the signal is low-pass filtered to suppress nonlinear effects within the ZIF IC.

ZIF IC (U3201)

Within the ZIF IC, the 44.85 MHz IF signal is mixed in two quadrature
paths down to baseband, filtered, processed, and FM demodulated.
The conversion process to baseband is performed by using a second LO
circuit consisting of Q3201, inductor L3204 and several capacitors
that, in combination with varactor diode CR3201 and a loop filtered
steering line from U3201-18, closes a phase locked loop (PLL).
The demodulated audio signal exits the ZIF IC at U3201-28 and is
applied to the Audio Signalling Filter IC (ASFIC), which is located in
the controller section of the radio.

8

Theory of Operation

Transmitter
Detailed Functional
Description

The transmitter function of the radio is distributed between the
controller, synthesizer, and power amplifier (PA) sections of the radio.
This is shown on the overall functional block diagram for the radio,
Figure 1.
The portion of the transmitter function physically located in the
controller section is described in the Controller Section Theory of
Operation located in Volume 1 of this service manual. That portion
includes the audio circuits that filter, amplify, and otherwise process
the audio signal from the microphone and/or telephone handset.
The portion of the transmitter function located in the synthesizer
section of the radio is described in the Synthesizer Detailed Functional
Description, which follows this paragraph.
The remaining part of the transmitter function of the radio is located
in the power amplifier section, which is described after the description
of the synthesizer.

Synthesizer Detailed
Functional Description

The synthesizer section of the transmitter receives the amplified and
processed audio signal from the controller section of the radio and
produces a frequency-modulated radio frequency carrier signal (the
transmitter injection signal), which is input to the transmitter power
amplifier (PA) section.
The synthesizer section of the radio also generates the first conversion
local oscillator signal (180.85 to 218.85 MHz) and the second
conversion reference oscillator signal (2.1 Mhz) for the receiver and
controller sections of the radio.
The following discussion is based on the schematic diagram for the
synthesizer section on page 25.

Synthesizer Circuitry

The synthesizer consists of Pendulum reference oscillator U5800,
Fractional-N integrated circuit (IC) U5801, transmit and receive
voltage controlled oscillators (VCOs) Q3803 and Q3804, buffer
amplifiers Q3805 and Q5801, transmit injection amplifier Q5802, and
feedback amplifier Q5774.
Pendulum reference oscillator U5800 contains a temperature
compensated quartz crystal oscillator with a frequency of 16.8 MHz.
The oscillator is tuned by a temperature referenced 5-bit analog-todigital (A/D) converter located in the controller section of the radio.
The output of the oscillator (U5800-10) is applied to U5801-14
(XTAL1) via C5754 and R5750.
The transmit and receive VCOs are the grounded drain Colpitts type
using junction field effect transistors (JFETs) and lumped elements.
The transmit VCO covers the frequency range of 136 to174 MHz. The
receive VCO covers the range of 180.85 to 218.85 MHz. The transmit
VCO is activated by U5801-38 (AUX2) and the action of transistor
switches Q3806 and Q3802. The receive VCO is activated by U5801-39
(AUX3) and the action of transistor switches Q3807 and Q3801. The
frequency of each VCO is proportional to the applied control voltage,
which is in the range of 2 to11 VDC. The control voltage is applied to
frequency control varactors CR3803 through CR3806 via a loop filter.

Theory of Operation

9

The Fractional-N synthesizer Integrated Circuit (U5801) contains the
following circuits:
-

Prescaler
Programmable loop divider
Control divider logic
Phase detector
Charge pump
A/D converter for low frequency modulation
Modulation low-frequency/high-frequency balance attenuator
Positive voltage multiplier drivers
Serial interface for control
Super filter low noise supply

Transistor Q5770 is a current amplifier for the super filter low noise
supply. The super filter drops 9.3 VDC (emitter of Q5770) to about 8.6
VDC (collector of Q5770). The filtered 8.6 VDC supplies the oscillator
circuit, modulation circuit, VCO switching circuits, and synthesizer
charge pump resistor network. Feedback amplifier Q5774 provides the
amplification and isolation necessary to drive the prescaler input
(U5801-21). Three-terminal regulator U5802 drops 9.3 VDC from the
controller section of the radio to 5 VDC required by the Fractional-N
synthesizer IC.
To generate a high voltage needed by the phase detector (charge
pump) output stage at U5801-36 (VCP), a voltage of 13 VDC at
CR5750-1 is generated by a positive voltage multiplier (CR5750,
C5759, C5760). The positive voltage multiplier is basically a diode
capacitor network driven by two 1.05-MHz 180 degrees out of phase
signals (U5801-8 and U5801-9).
The serial interface (SRL) of the microprocessor in the controller
section of the radio is connected to the data line (U5801-2), clock line
(U5801-3), and chip enable line (U5801-4) of the fractional-N IC.

Synthesizer Operation

The complete synthesizer works as follows: Fractional-N IC U5801 is
programmed for either transmit or receive via the serial data bus. The
appropriate VCO is activated via the AUX control pins of U5801 and
the prescaler and loop divider are set for the desired frequency. The
outputs from the VCOs are amplified by buffer amplifiers Q3805 and
Q5801. The output of buffer amplifier Q5801 is split three ways. First,
the feedback amplifier Q5774 is connected via the resistive attenuator
consisting of R5773, R5771, and R5772. The local oscillator port for
the mixer in the receiver front end section of the radio is also
connected at this node (Rx Inj). Finally, transmit injection amplifier
Q5802 is connected at this node via the resistive attenuator composed
of R5782, R5783, and R5784. The output of amplifier Q5802 (TX inj)
is connected to the transmitter power amplifier.
The prescaler in the synthesizer (Fractional-N IC U5801) is basically a
dual modulus prescaler with selectable divider ratios. The divider ratio
of the prescaler is controlled by a loop divider, which in turn receives
its inputs via the SRL. The output of the prescaler is applied to the loop
divider. The output of the loop divider is connected to the phase
detector, which compares the loop divider output signal with a
reference signal. The reference signal is generated by dividing down
the signal of the reference oscillator (Pendulum oscillator U5800). The

10

Theory of Operation

output signal of the phase detector is a pulsed DC signal, which is
routed to the charge pump. The charge pump outputs a current at
U5801-32 (I OUT). The loop filter (which consists of R5760 through
R5762 and C5775 through C5780) transforms this current into a
voltage, which is applied to both VCOs to control their output
frequencies.
The current can be set to a value fixed in the FRACN IC or to a value
determined by the currents flowing into CPBIAS 1 (U5801-29) or
CPBIAS 2 (U5801-28). The currents are set by the values of R5752 and
R5753 or R5756 and R5757, respectively. Selection of one of the three
different bias sources is done by the radio software.
To reduce synthesizer lock time when new frequency data has been
loaded into the synthesizer, the magnitude of the loop current is
increased by enabling the I ADAPT line (U5801-34) for a certain
software-controlled amount of time (Adapt Mode). Additionally the
loop current is increased by bypassing R5752 and R5753 with Q5750,
and bypassing R5756 and R5757 with Q5751. Bypassing starts when
the FRACN CE line changes from high to low and ends a certain delay
time after the transition from low back to high. The adapt mode timer
and the bypassing delay are both started by the low to high transition
of the FRACN CE line. The adapt mode time is programmed to be
somewhat shorter than the bypassing delay time, which is hardware
dependent. This causes two different current levels during frequency
acquisition of the loop. When the synthesizer is within the lock range,
the current is determined only by the resistors connected to CPBIAS 1,
CPBIAS 2, or the internal current source.
The output of the balance attenuator is MODOUT (U5801-30) and is
connected to the transmit VCO modulation network. The modulation
is applied to the transmit VCO via varactor diode CR3807.

Transmit Injection
Amplifier

Transmit injection amplifier Q5802 increases the output of Q5801 to
about +13 dBm. This is the level required by the first stage of the
transmitter power amplifier. The transmit injection amplifier collector
supply of 9.1 volts and originates in the controller section of the radio.
It is active only during transmit.

Power Amplifier
Overall PA

The power amplifier (PA) is a radio frequency (rf) power amplifier,
which amplifies the output from the injection string (TX_INJ) to an RF
output power level of 25 Watts.
The following discussion is based on the schematic diagram for the
power amplifier (PA), on page 27
The PA is a three stage amplifier, which amplifies the output from the
transmitter injection string in the Synthesizer Section to the transmit
level (nominally 25 Watts).
The first stage (Q3521) of the PA is a bipolar stage, which is controlled
via the PA control line. It is followed by two Metal Oxide
Semiconductor Field Effect Transistor (MOSFET) devices, Q3541 and
Q3561.
Devices Q3521 and Q3541 are surface mounted. To remove heat from
Q3541, the surface mounted heat spreader on the opposite side of the
Theory of Operation

11

printed circuit board provides thermal contact of the transistor to the
heat sink on the radio chassis. Transistor Q3561 is attached directly to
the heat sink.
The RF power output of Q3521 is proportional to the Q3521collector
current. This current is adjusted by the PA control voltage (PA
Control). If the PA control voltage raises, the base voltage of Q3601 is
also raised, which causes more current to flow to the collector of
Q3601 and a higher voltage drop across R3606. This results in more
current being drawn by Q3501 so that the base current on Q3521 is
increased. This in turn causes higher collector current to flow through
Q3521. The collector current settles when the voltage drop across the
parallel combination of resistors R3530 throughR3533 equals the
voltage drop across R3606 minus the base-to-emitter voltage drop of
Q3501.
By controlling the output power of Q3521 and in turn the input power
of the following stages, the automatic level control (ALC) loop is able
to regulate the output power of the transmitter.
The MOSFET devices Q3541 and Q3561 are enhancement mode NChannel MOSFETS. For proper operation, these devices require a
positive gate bias voltage and a quiescent current flow with no drive.
To achieve these requirements, the gates are biased through the
network consisting of R3582, R3525, and R3526 for Q3541 and
similarly R3585, R3544, and R3545 for Q3561. The actual value of the
voltage at this gate is device dependent and determined by trim in the
factory when the radio is built.
The output of Q3561 goes through the matching network consisting
of four transmission lines, inductor L3566, and several capacitors to
the directional coupler.
Directional Coupler, RX-TX
Switch, and
Harmonic Filter

The forward power detector (directional coupler) is a microstrip
printed circuit, which couples a small amount of the forward RF
energy off and sends it to diode CR3671 where it is rectified. The
rectified signal forms the V detect voltage, which is proportional to the
rectified RF energy appearing across the diode. The power control
circuit holds this voltage constant, thus ensuring that the forward
power out of the radio is held constant.
The antenna switch is switched synchronously with the keyed 9.1
voltage (K 9V1). In transmit mode, the K 9V1 line is high and the
current turns on the PIN diode CR3641. The receiver preamplifier
transistor Q3302, also turned off by the keyed 9.1 voltage, cuts off the
current through the PIN diode CR3642 and turns off transistor Q3641.
In receive mode the K 9V1 line is low. This turns off the PIN diode
CR3641 and turns on the receiver preamp transistor Q3302. The
current through Q3302 turns on the PIN diode CR3642 and transistor
Q3641. Q3641 shorts R3644 to increase the current through Q3302.
Harmonics of the transmitter are attenuated by the harmonic filter
formed by inductors L3661 through L3663, and capacitors C3661
through C3664. This network forms a low-pass filter to attenuate
harmonic energy of the transmitter to an acceptable level. L3664
provides electrostatic protection for the power amplifier.

Temperature Sense

12

Theory of Operation

In the PA compartment, 100K ohm thermistor R3610 senses the
temperature of MOSFET devices Q3541 and Q3561. This signal is fed
back into the power control circuit to protect the power amplifier

against over temperature conditions. The power control circuit senses
the voltage drop across shunt resistor R3615, which is determined by
the magnitude of the drain current in Q3561. This is a limit
mechanism whereby the power control limits the magnitude of
current that can be drawn by Q3561 to protect the device from
excessive power dissipation.

PA Power Control

The maximum value of the PA control line is limited by R3601 and
R3602, the resistor divider off of PA control. This inputs a signal back
into the power control circuit that limits the magnitude of the voltage
to which the PA control line can rise.
Reverse polarity protection for the transmitter is provided by diode
CR3601. This diode is soldered to the board as well as being pressed
against a member in the chassis heat sink so under reverse polarity
conditions to the radio this diode conducts and protects the radio
from damage. This diode also provides transient over-voltage
protection by breaking down when the supply voltage to the radio
exceeds 25 volts.
The power control circuit (located in the controller section of the
radio) consists of the control amplifier (U0550-9), the control voltage
limiter (U0202), the detector voltage buffer/amplifier (U0550-12, -13,
-14) the PA temperature sense circuit (U0550-1, -2, -3) and the current
limit circuit.
The voltage from the forward power detector in the PA is amplified by
U0550-12, -13, -14. The output voltage is added to the PA power set
voltage at the inverting input of control amplifier U0550-9. Its
noninverting input is set to a fixed 4.65 volts. As long as there is a
differential input voltage at the control amplifier input, the output
voltage (PA control voltage) is altered. This in turn causes a change of
the RF output power level and the detector voltage, which leads to a
changing differential input voltage. When the control loop is in steady
state the voltages at both the inverting and the noninverting input are
equal.
To obtain a higher RF output level, the power set voltage generated by
the D/A converter U0551-2 is reduced. This causes a lower level at the
summing point U0550-9. The control loop compensates this
difference by increasing RF power and detector voltage until balance
between the two control amplifier inputs is obtained again. Reduction
of the power level works in the opposite manner.
Operational amplifier U0202 functions as an integrator, which
controls, via Q0556, the control voltage slope during key up and
dekey.
During RX operation, Q0556 pulls R0590 down, the output of U0202
is at its maximum level, Q0555 conducts and the output of U0550 is
at its minimum output level.
After pressing PTT, transistor Q0556 switches off. Capacitor C0552 is
charged via R0584 and R0590. In turn the output voltage of U0202
decreases which causes an increase of the voltage at the non-inverting
input of U550. This increases the PA control voltage. The loop is closed
via R0591 and R0592. This feedback causes an exponential like rising
edge of the control voltage. Such a smoothed keyup leads to an
improved adjacent channel power reduction during TX keyup
compared with a linear ramp.

Theory of Operation

13

After keyup the circuit does not effect the performance of the power
control circuit as long as the control voltage does not increase over a
certain value defined by R0591/R0592 and the voltage applied to
R0584 by the D/A output U0055-13. If this occurs the control voltage
will be limited to the predefined value and the PA prevented from
being damaged.
If the radio switches from TX to RX transistor Q0556 pulls R0590
down and C0552 is discharged via R0590. This causes the output of
U0202 to go up and tie down the noninverting input of U0550. The
control voltage decreases controlled by the loop U0202, Q0555, and
U0550.
The protection features in the PA power control operate by raising the
non-inverted input to the operational amplifier above the reference
voltage, which has the same effect as a larger input from the coupler.
The thermal shutback circuit works when the temperature of R3610
decreases its resistance, the output at pin 1 of U0550 increases. When
that voltage rises above the reference voltage at pin 10 of U0550, the
control voltage of the PA is decreased lowering the power output. The
current limiting circuit measures the voltage drop across R3615
causing an adjustable offset to the voltage controlled by the D to A
output for current limit set. The difference of that is amplified at pin 7
of U0550. When the voltage exceeds the reference at pin 10 of U0550,
then current limit starts to engage reducing power output.

Controller Detailed
Functional
Description

The theory of operation for the controller section of the radio is
located in Volume 1 of this service manual.

DC Power Control
and Regulation
Detailed Functional
Description

The theory of operation for the dc power control and regulation
section of the radio is located in Volume 1 of this service manual.

14

Theory of Operation

Referen

Reference Drawings

3

This section contains the reference drawings listed below for the
receiver (front end, IF, and back end), transmitter, and synthesizer
portions of the radio.
• Overall Radio:
-

Transceiver Board Section Locations - Page 16

-

Schematic Diagram Interconnection List, Table 2 - Page 29

• Receiver:
-

Receiver Front End Component Locations and Parts List Page 18

-

Receiver Front End Schematic Diagram - Page 19

-

Receiver IF Component Locations and Parts List - Page 20

-

Receiver IF Schematic Diagram - Page 21

-

Receiver Back End Component Locations and Parts List Page 22

-

Receiver Back End Schematic Diagram - Page 23

• Synthesizer:
-

Synthesizer Component Locations and Parts List - Page 24

-

Synthesizer Schematic Diagram - Page 25

• Power Amplifier:
-

Power Amplifier Component Locations and Parts List Page 26

-

Power Amplifier Schematic Diagram Page 27

Refer to Volume 1 of this service manual (Motorola Publication
68P81083C20) for reference drawings for the controller and control
head portions of the radio.
Refer to the Secure Option service manual (Motorola Publication
68P81083C25) for reference drawings for the secure option for the
radio.

Reference Drawings

15

CONTROLLER
AUDIO AND POWER
REGULATION

CONTROLLER
COMMON

RECEIVER
IF

RECEIVER
BACK END

SYNTHESIZER
RECEIVER
FRONT END

TRANSMITTER PA

MAEPF-26504-O

Figure 2 Transceiver Board Section Locations

16

Reference Drawings

NOTES

Reference Drawings

17

RECEIVER FRONT END COMPONENT LOCATIONS

RECEIVER FRONT END PARTS LIST

R3343

R3305

R3312
C3316

R3306

R3301

L3302
L3307

C3301
C3302
C3303
C3304
C3306
C3307
C3308
C3309
C3310
C3312
C3313
C3314
C3315
C3316
C3317
C3320
C3321
C3322
C3323
C3324
C3325
C3326
C3327
C3329
C3330
C3331
C3332
C3334
C3336
C3340
C3341
C3342
C3343
C3346
C3348

2113741F49
2113741F25
2113740F45
2113740F15
2113740F51
2113740F51
2113740F51
2113743K15
2113741F25
2113740F51
2113741F49
2113743K15
2113741F25
2113741F13
2113741F13
2113740F33
2113740F24
2113740F21
2113740F18
2113740F25
2113740F20
2113740F18
2113740F22
2113740F42
2113740F45
2113741F17
2113741F17
2113740F42
2113740F15
2113741F25
2113741F25
2113741F49
2113741F49
2113741F49
2113741F49

0.01 uF
1000 pF
56 pF
3.3 pF
100 pF
100 pF
100 pF
0.1 uF
1000 pF
100 pF
0.01 uF
0.1 uF
1000 pF
330 pF
330 pF
18 p F
7.5 pF
5.6 pF
4.3 pF
8.2 pF
5.1 pF
4.3 pF
6.2 pF
43 pF
56 pF
470 pF
470 pF
43 pF
3.3 pF
1000 pF
1000 pF
0.01 uF
0.01 uF
0.01 uF
0.01 uF

C3303

MAEPF-26494-O

CR3301

4813833C02

CR3302
CR3303
CR3330

4802081B58
4880154K03
4880142L01

Dual, 70V, Common
Cathode
Dual, Varicap
Dual, Schottky Mixer
PIN

E3301

2602474Y01

Preselector

L3301
L3302
L3304
L3305
L3306
L3307
L3308
L3309
L3320
L3321
L3322
L3323
L3325
L3340

2462587T30
2462587T12
2460591L29
2460591L29
2460591L29
2460591L29
2462587T30
2462587T30
2462587T16
2462587T16
2462587T16
2462587T16
2462587T12
2462587T30

1000 nH
56 nH
16.03 nH, Airwound
16.03 nH, Airwound
16.03 nH, Airwound
16.03 nH, Airwound
1000 nH
1000 nH
120 nH
120 nH
120 nH
120 nH
56 nH
1000 nH

Q3301
Q3302

4813824A17
4882971R01

PNP
NPN

R3302

DESCRIPTION

REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

R3301
R3302
R3303
R3304
R3305
R3306
R3307
R3308
R3309
R3310
R3311
R3312
R3313
R3330
R3341
R3343
R3344
R3345

0662057A97
0662057A65
0662057A73
0662057A73
0662057A18
0662057A73
0662057A35
0662057A41
0662057A09
0662057A35
0662057C19
0662057A01
0662057A49
0662057A61
0662057A18
0662057A35
0662057A09
0662057A35

100K
4700
10K
10K
51
10K
270
470
22
270
4.7
10
1000
3300
51
270
22
270

T3301
T3302
T3303

2505515V03
2505515V03
2505515V07

4:1 BALUN
4:1 BALUN
4:1 BALUN

DESCRIPTION
RESISTORS:

TRANSFORMERS:

Printed Circuit Board
(For Reference Only):

8402573Y06
and
8402573Y09

For Kit HUD4012D

NOTES:
1. All resistance values are in ohms unless indicated otherwise.
2. Components shown on component location and schematic
diagrams but not included in parts list are not placed.

DIODES:

R3303

Q3303
Q3301

C3313

R3330

C3332

R3304

C3309
CR3301

L3304

CR3303

HEAVY COMPONENTS SIDE

C3331

C3306
C3307

C3314

L3305

C3308

R3307

C3310

R3313

CR3302
L3306

Q3302

L3308

R3309

C3311

C3312

C3323

C3327

L3324

C3336

L3320

C3304

C3302

C3342

L3325

C3320
C3321

C3317

R3341

C3324
C3325
C3315 R3310
L3322

T3302

C3333

R3345

L3323
C3326

C3329

R3344

R3340

C3328

C3334

C3330

L3321

R3311 R3308

C3340

T3301

T3303

C3341

C3346

C3347

C3343

C3322

MOTOROLA
PART NUMBER

CAPACITORS:

E3301
C3348

REFERENCE
SYMBOL

SHIELDS:

INDUCTORS:

L3301

C3301

CR3330
L3309

LIGHT COMPONENTS SIDE
MAEPF-26495-O

TRANSISTORS:

18
This document was created with FrameMaker 4.0.3

Receiver Front End (Kit HUD4012D)
Component Locations and Parts List

10_RFE SD p19 Page 19 Tuesday, January 19, 1999 4:57 PM

9.3V

9.3V

IF4-4-2

N.U.

REG 5V

E3301

IF_IN
(TO RECEIVER IF)

RX INJ

63A81090C56-O

Receiver Front End (Kit HUD4012D) Schematic Diagram
This document was created with FrameMaker 4.0.3

19

11_RIF CL/PL p20 Page 20 Tuesday, January 19, 1999 4:58 PM

RECEIVER IF COMPONENT LOCATIONS
RECEIVER IF PARTS LIST
REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

C3408

R3415
C3411

CR3401

R3409
C3409
C3418

L3404

C3415

Y3402

C3416
C3417

C3410

R3406
C3413
C3404
C3405
R3411
R3402
CR3402
C3419

L3407

L3406

R3412

C3412

C3407

R3413
R3414 Q3401

C3406

R3401

R3405

L3401

L3403

Y3401

R3408

R3403

C3403

L3402

C3401

R3404

C3335

C3402

C3414

MAEPF-26496-O

HEAVY COMPONENTS SIDE

MOTOROLA
PART NUMBER

Y3401
Y3402

4805846W01
4805846W03

DESCRIPTION

DESCRIPTION
FILTERS:
CAPACITORS:

R3410

REFERENCE
SYMBOL

C3305
C3335
C3350
C3351
C3352
C3353
C3355
C3357
C3358
C3359
C3360
C3361
C3401
C3402
C3403
C3404
C3405
C3406
C3407
C3408
C3409
C3410
C3411
C3412
C3413
C3414
C3415
C3416
C3417
C3418
C3419

2113741F49
2113740F18
2113740F51
2113740F51
2113740F51
2113740F51
2113740F51
2113740F51
2113741F58
2113741F49
2113740F51
2113740F51
2113740F24
2113740F25
2113740F31
2113743A19
2113740F24
2113741F49
2113740F51
2113741F49
2113741F49
2113740F15
2113741F13
2113740F25
2113741F25
2113740F09
2113740F09
2113740F27
2113740F45
2113740F31
2113740F44

0.01 uF
4.3 pF
100 pF
100 pF
100 pF
100 pF
100 pF
100 pF
100 pF
0.01 uF
100 pF
100 pF
7.5 pF
8.2 pF
15 pF
0.1 uF
7.5 pF
0.01 uF
100 pF
0.01 uF
0.01 uF
3.3 pF
330 pF
8.2 pF
1000 pF
1.8 pF
1.8 pF
10 pF
56 pF
15 pF
51 pF

CR3401
CR3402

4880142L01
4880154K03

PIN
Dual Schottky Mixer

L3401
L3402
L3403
L3404
L3406
L3407

2462587T30
2462587T30
2462587T30
2462587T30
2462587T30
2462587T30

1000 nH
1000 nH
1000 nH
1000 nH
1000 nH
1000 nH

Q3303
Q3401

5105625U28
4882022N70

Mixer, Integrated Circuit
NPN

R3401
R3402
R3403
R3404
R3405
R3406
R3408
R3409
R3410
R3411
R3412
R3413
R3414
R3415

0662057A18
0662057A18
0662057A73
0662057A73
0662057A35
0662057A39
0662057A01
0662057A49
0662057A59
0662057A41
0662057A53
0662057A39
0662057A01
0662057A73

51
51
10K
10K
270
390
10
1000
2700
470
1500
390
10
10K

Crystal, 44.85 MHz
Crystal, 44.85 MHz
PRINTED CIRCUIT
BOARD (For
Reference Only):

8402573Y06
and
8402573Y09

For Kit HUD4012D

NOTES:
1. All resistance values are in ohms unless indicated otherwise.
2. Components shown on component location and schematic
diagrams but not included in parts list are not placed.

C3357

C3354

INDUCTORS:

C3358

C3355

C3364

C3353

C3359 C3350

L3351

C3360

C3420

Q3402

C3305

L3350

C3352

C3351
C3361

C3363

DIODES:

TRANSISTORS:

RESISTORS:

L3340

MAEPF-26497-O

LIGHT COMPONENTS SIDE

20
This document was created with FrameMaker 4.0.3

Receiver IF (Kit HUD4012D)
Component Locations and Parts List

9.3V

47k

9.3V

47k

N.U.
N.U.

IF_IN
(FROM RECEIVER
FRONT END)

9.3V

N.U.

N.U.

N.U.

N.U.

N.U.

63A81090C57-O

Receiver IF (Kit HUD4012D)Schematic Diagram
This document was created with FrameMaker 4.0.3

21

13_RBE CL/PL p22 Page 22 Tuesday, January 19, 1999 5:03 PM

RECEIVER BACK END COMPONENT LOCATIONS
RECEIVER BACK END PARTS LIST

R3219

E3201

R3210

R3209

R3222

R3206

HEAVY
COMPONENTS
SIDE

C3231

CR3201
L3204

C3218

C3232

R3201

R3202

CR3202

C3217

C3229

R3223

R3211

C3203

Q3203 R3212

C3246

C3219

R3205

C3225 C3248 R3220

L3207

R3221

C3243

R3203

C3210

L3208
CR3203

MAEPF-26498-O

C3202

C3211

R3224

R3201
R3202
R3203
R3204
R3205
R3206
R3209
R3210
R3211
R3212
R3215
R3216
R3217
R3218
R3219
R3220
R3221
R3222
R3223

0662057A89
0662057A89
0662057A80
0662057A59
0662057A59
0662057A59
0662057A53
0662057B47
0662057A84
0662057A73
0662057B05
0662057A42
0662057A53
0662057A53
0662057A65
0662057A81
0662057A53
0662057A73
0662057A77

47K
47K
20K
2.7K
2.7K
2.7K
1.5K
0
30K
10K
200K
510
1.5K
1.5K
4.7K
22K
1.5K
10K
15K

U3201

5186296A02

Zero IF, F91 P-3

DESCRIPTION

C3201
C3202
C3203
C3204
C3205
C3206
C3207
C3208
C3209
C3210
C3211
C3212
C3213
C3214
C3215
C3216
C3217
C3218
C3219
C3220
C3221
C3222
C3223
C3224
C3225
C3229
C3230
C3231
C3232
C3234
C3243
C3245
C3246
C3247
C3249
C3250

2113743K15
2113740F51
2113743K15
2113743A23
2113743K15
2113743K15
2113743A23
2113743K15
2113743K15
2113740F41
2113743A19
2113743A23
2113743A23
2113741A51
2311049A02
2113743K15
2113740F37
2113740F41
2113740F42
2109720D14
2113741F17
2109720D14
2113743K15
2113743K15
2113743K15
2311049J23
2113743K15
2113741F25
2113743K15
2113740F19
2113743K15
2113743K15
2113743K15
2113741F49
2113740F15
2113740F22

0.1 uF
100 pF
0.1 uF
0.22 uF
0.1 uF
0.1 uF
0.22 uF
0.1uF
0.1uF
39 pF
0.1uF
0.22uF
0.22uF
0.018 uF
0.15 uF
0.1 uF
27 pF
39 pF
43 pF
0.1 uF
470 pF
0.1 uF
0.1 uF
0.1 uF
0.1 uF
10 uF
0.1uF
1000 pF
0.1uF
4.7 pF
0.1uF
0.1uF
0.1uF
0.01 uF
3.3 pF
6.2 pF

CR3201
CR3203
CR3204

4862824C01
4805129M96
4880154K03

Varactor
Dual
Dual Schottky Mixer

E3201

2605261V01

ZIF

L3204
L3205
L3207
L3208

2462587T23
2462587Q44
2462587T23
2462587T30

470 nH
560 nH
470 nH
1000 nH

Q3201
Q3203

4882022N70
4882022N70

NPN
NPN

DESCRIPTION
RESISTORS:

INTEGRATED CIRCUITS:
PRINTED CIRCUIT
BOARD (For
Reference Only):

8402573Y06
and
8402573Y09

For KIt HUD4012D

NOTES:
1. All resistance values are in ohms unless indicated otherwise.
2. Components shown on component location and schematic
diagrams but not included in parts list are not placed.

LIGHT
COMPONENTS
SIDE

SHIELD:

INDUCTORS:

C3209

C3207

C3208

C3212

C3213

TRANSISTORS:

C3220

C3221

C3206

C3222

R3217

MOTOROLA
PART NUMBER

DIODES:

CR3204

C3224 R3218

U3201

C3204

R3204

C3205

R3216

C3215

C3214
R3215

C3230

C3223

L3205

C3201

C3216

MOTOROLA
PART NUMBER

CAPACITORS:

Q3201 C3234

C3247

C3249
C3250

REFERENCE
SYMBOL

REFERENCE
SYMBOL

C3245

MAEPF-26499-O
22
This document was created with FrameMaker 4.0.3

Receiver Back End (Kit HUD4012D)
Component Locations and Parts List

14_RBE SD p23 Page 23 Tuesday, January 19, 1999 5:04 PM

DEPC-97142-O/None

Receiver Back End (Kit HUD4012D) Schematic Diagram
This document was created with FrameMaker 4.0.3

23

15_Syn CL/PL p24 Page 24 Tuesday, January 19, 1999 5:06 PM

SYNTHESIZER COMPONENT LOCATIONS
C5767

VIEWED FROM SIDE 1

C5777

R5758

R5853 Q5751
C3890

C5851

Q3806

R5752 R5753 C5771

Q3807

C5782

MAEPF-26500-O

R5786

C5808

C5800

C5809

E5702

C5810

R5764

C5770

Q5770

R5772

R5797
R5795

C5752

R3815

R5765
C5781

R5796

R5781 R5773

C3891

R5766

R3813

R5794

R5754

R5763

C5753 C5764 C5761
Q5775

U5800
C5791

L5759

C5758
R3817

R5757

R5756
R5759

C5805

R3812
R3814

C5762

C5854 R5852

C5757
R5866

U5801

C5760

C5750

R5777

C5780
R5850

C5769

R5798

R5771

C5751

Q5750

C5853 C5850

C5759

CR5750

Y5700

C3892

C5789

R5776
C5792

R5778 R5779

Q5801

CR5751

C5754

R5774

C5794

C5755

C5768

R5769

C5763

C5774 R5770

R5854

C5773

R5767

C5772

L3809

R5768

C5856

C5857

R5750 C5855

C3884

R5855

E5704

Q3802

C5795

R5851 C5776

E5705

R5761 R5760

L3805

CR3805

VR5750

Q5774

R5780

C5793

C5779
C5756

L5792

L5791

C5775

CR3806

C3889

C3868
C3882

C3872

R3809

C3877

R3808

R5783
R5782

C5798

R5788
R5784
C5796
C5797

C3879
R5775

R5787

Q5802

L3811

L3815

U5802

C5778

C5790

C3871

C3869

C3880

C3881
R3806
C3878

C5802

R5790

R3805

L3813

C5803
L5793

C5799

R5793

L3806

CR3807
C3873 R3807
C3883
R3804 R3816
Q3805 R3810 C3875
R3811
L3812
L3810 C3886

R5792

R5791

R3803

C3863 C3862

R3802

R5789

R3801

CR3802

Q3801
C5804
C5807

L5794

C3864 C3865

Q3803 C3866 CR3801
C3870
C3874
Q3804
C3876

L3814

C3888

CR3803 L3802

R5762
C5766

C3861

L3801

L5765

C5765

CR3804

VIEWED FROM SIDE 2

MAEPF-26501-O

LIGHT COMPONENTS SIDE

HEAVY COMPONENTS SIDE
SYNTHESIZER PARTS LIST
REFERENCE
SYMBOL

MOTOROLA
PART NO.

C3861
C3862
C3863
C3864
C3865
C3866
C3868
C3869
C3870
C3871
C3872
C3873
C3874
C3875
C3876
C3877
C3878
C3879

2113741F17
2113740F42
2113740F37
2113740F27
2113740F27
2113741F17
2113740F45
2113740F39
2113740F27
2113740F29
2113741F17
2113740F18
2113740F18
2113741F17
2113741F17
2113741F17
2113740F29
2113740F34

DESCRIPTION
CAPACITORS:

470 pF
43 pF
27 pF
10 pF
10 pF
470 pF
56 pF
33 pF
10 pF
12 pF
470 pF
4.3 pF
4.3 pF
470 pF
470 pF
470 pF
12 pF
20 pF

REFERENCE
SYMBOL

MOTOROLA
PART NO.

C3880
C3881
C3882
C3883
C3884
C3886
C3888
C3889
C3890
C3891
C3892
C5750
C5751
C5752
C5753
C5754
C5755
C5756
C5757
C5758
C5759

2113740F21
2113741F17
2113740F07
2113740F25
2113741F17
2113740F29
2113743K15
2113740F35
2113741F17
2113741F17
2113740F45
2113741F49
2113743E07
2113741F49
2113743K07
2113743E07
2311049A19
2113741F49
2113743K15
2113743K15
2113743K15

REFERENCE
SYMBOL

MOTOROLA
PART NO.

C5760
C5761
C5762
C5763
C5764
C5765
C5766
C5767
C5768
C5769
C5770
C5771
C5772
C5773
C5774
C5775
C5776
C5778
C5780
C5781
C5782
C5789
C5790
C5791
C5792
C5793
C5794
C5795
C5796
C5797
C5798
C5799
C5800
C5802
C5803
C5807
C5808
C5809
C5850
C5853

2113743K15
2113741F25
2113743E07
2113741F49
2311049J23
2113743K15
2311049J26
2113743K15
2113740F51
2113741F25
2311049J26
2113741F25
2113741F25
2113741F49
2113741F49
2109720D14
2109720D14
0811051A19
2113741F25
2311049A07
2113741F25
2113743K15
2113743K15
2311049J11
2113743K15
2113741F25
2113741F17
2113740F31
2113740F27
2113741F17
2113741F17
2113741F25
2113743K15
2113741F17
2113740F29
2113741F25
2113740F51
2113741F25
2113743A19
2113740F51

0.1 uF
1000 uF
0.022 uF
0.01 uF
10 uF
0.1 uF
10 uF
0.1 uF
100 pF
1000 pF
10 uF
1000 pF
1000 pF
0.01 uF
0.01 uF
0.1 uF
0.1 uF
1 uF
1000 pF
1 uF
1000 pF
0.1 uF
0.1 uF
4.7 uF
0.1 uF
1000 pF
470 pF
15 pF
10 pF
470 pF
470 pF
1000 pF
0.1 uF
470 pF
12 pF
1000 pF
100 pF
1000 pF
0.1 uF
100 pF

CR3801
CR3802
CR3803
CR3804
CR3805
CR3806
CR3807
CR5750

4880236E05
4880236E05
4805649Q13
4805649Q13
4805649Q13
4805649Q13
4805649Q13
4802233J09

Hot Carrier
Hot Carrier
Varactor
Varactor
Varactor
Varactor
Varactor
Triple

E3801
E5702
E5704
E5705

2602641Y01
2602660J02
2605259V01
2602658J02

VCO

L3801
L3802
L3804
L3805
L3806
L3808
L3809

2462587T30
2462587T30
0105950T44
2462587T30
2462587T20
0105950T45
2462587T30

1000 nH
1000 nH
Helical Coil, Square
1000 nH
270 nH
Helical Coil, Square
1000 nH

DIODES:

DESCRIPTION
5.6 pF
470 pF
1.5 pF
8.2 pF
470 pF
12 pF
0.1 uF
22 pF
470 pF
470 pF
56 pF
0.01 uF
0.022 uF
0.01 uF
0.047 uF
0.022 uF
10 uF
0.01 uF
0.1 uF
0.1 uF
0.1 uF

DESCRIPTION

SHIELDS:

INDUCTORS:

REFERENCE
SYMBOL

MOTOROLA
PART NO.

L3810
L3811
L3812
L3813
L3814
L3815
L5765
L5791
L5792
L5793
L5794

2462587T13
2462587T12
2462587T13
2462587T30
2462587T30
2462587T20
L2462587T17
2462587T16
2462587T12
2462587T16
2462587T13

68 nH
56 nH
68 nH
1000 nH
1000 nH
270 nH
150 nH
120 nH
56 nH
120 nH
68 nH

Q3801
Q3802
Q3803
Q3804
Q3805
Q3806
Q3807
Q5750
Q5770
Q5774
Q5801
Q5802

4813824A10
4813824A10
4813823A05
4813823A05
4882022N70
4880048M01
4880048M01
4813824A17
4813824A17
4882022N70
4882022N70
4813827A26

NPN
NPN
N-Channel RFJFET
N-Channel RF JFET
NPN
NPN
NPN
PNP
PNP
NPN
NPN
NPN

R3801
R3802
R3803
R3804
R3805
R3806
R3807
R3808
R3809
R3810
R3811
R3812
R3813
R3814
R3815
R3816
R3817
R5750
R5752
R5753
R5754
R5758
R5759
R5760
R5761
R5762
R5763
R5764
R5766
R5767
R5768
R5769
R5770
R5771
R5772
R5773
R5774
R5775
R5776

0662057A83
0662057A33
0662057A83
0662057A25
0662057A39
0662057A15
0662057A15
0662057A59
0662057A59
0662057A77
0662057A43
0662057A59
0662057A59
0662057A59
0662057A59
0662057A18
0662057A43
0662057A65
0662057B02
0662057B02
0662057A53
0662057A57
0662057A35
0662057A49
0662057A25
0662057A41
0662057A59
0662057A53
0662057B02
0662057A35
0662057A59
0662057A49
0662057B47
0662057A43
0662057A18
0662057A25
0662057A09
0662057A35
0662057A35

27K
220
27K
100
390
39
39
2.7K
2.7K
15K
560
2.7K
2.7K
2.7K
2.7K
51
560
4.7K
150K
150K
1.5K
2.2K
270
1K
100
470
2.7K
1.5K
150K
270
2.7K
1K
0
560
51
100
22
270
270

DESCRIPTION

TRANSISTORS:

MOTOROLA
PART NO.

R5777
R5778
R5779
R5780
R5781
R5782
R5783
R5784
R5786
R5787
R5788
R5789
R5790
R5791
R5792
R5793
R5850
R5851
R5866

0662057A09
0662057A59
0662057A49
0662057A09
0662057A13
0662057A29
0662057A15
0662057A29
0662057A13
0662057A56
0662057A49
0662057A29
0662057A29
0662057A29
0662057A15
0662057A29
0662057A89
0662057A89
0662057B47

22
2.7K
1K
22
33
150
39
150

U5800
U5801
U5802

5105279V38
5105457W73
5113816A07

Oscillator, 16.8 MHz
FRACTN
Regulator, 5 VDC,
500 mA

VR5750

481380A23

10 VDC, 225 mW

DESCRIPTION

33

2K
1K
150
150
150
39
150
47K
47K
0
INTEGRATED CIRCUITS:

RESISTORS:
ZENER DIODE:

PRINTED CIRCUIT
BOARD (For reference
only):

8402573Y06
and
8402573Y09

For kit HUD4012D

NOTES:
1. All resistance values are in ohms unless indicated otherwise.
2. Components shown on component location and schematic
diagrams but not included in parts list are not placed

24
This document was created with FrameMaker 4.0.3

REFERENCE
SYMBOL

Synthesizer (Kit HUD4012D)
Component Locations and Parts List

63A81090C73-O

Synthesizer (Kit HUD4012D) Schematic Diagram
This document was created with FrameMaker 4.0.3

25

17_PA CL/PL p26 Page 26 Tuesday, January 19, 1999 5:08 PM

POWER AMPLIFIER COMPONENT LOCATIONS

J2

L3662

R3673

C3561

C3674

L3672

C3660

C3661

C3669
L3663

R3671

C3667
C3664
L3664

L3643

C3666
C3547

C3552

C3663

L3661

R3674

C3675
C3569

C3573

R3548

R3542

L3540

C3543

C3542

C3553
C3541

R3541

R3585

R3545

C3571

L3545

C3554

CR3641

C3570

C3672

C3625

R3544

C3562

C3545

R3527

R3644

C3565

C3626

R3525

R3643

C3624

C3623
L3547

C3566

C3662

CR3671
L3566

R3675
R3672

R3526

E3501

C3665

L3641

C3572
C3568

C3673

L3605

L3607

CR3642

L3562

L3548

R3543

C3527

R3610

C3526

R3532

C3621

L3522

R3533

CR3601
R3531

L3560

R3615
R3522

L3523

L3521

C3521
R3521

C3501
C3502

R3502

Q3521

R3530

C3563

L3608

C3524

C3620

CR3581

R3607

C3602

C3616

Q3501

C3505

C3619

C3583

Q3561

R3504

C3522

C3676

Q3541

R3503

C3606

C3530

C3523

R3583

L3501

C3504

R3677

R3501

C3613

C3603

L3603

VIEWED FROM SIDE 1

C3612

C3614

C3529

R3601
C3608

R3603

C3609

C3528

R3608

R3582

R3604

R3676

CR3673

C3604

R3606

E3503

L3642

C3641

R3605 Q3601

VR3602

C3564

R3642

R3602

C3605

C3610
R3641 C3642

C3548
C3567

R3586
J1

E3504
MAEPF-26502-O

MAEPF-26503-O

HEAVY COMPONENTS SIDE

POWER AMPLIFIER PARTS LIST
REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

C3501
C3502
C3504
C3505
C3521
C3522
C3523
C3524
C3526
C3528
C3529
C3530
C3541
C3542
C3543
C3545
C3547
C3548
C3553
C3554
C3561
C3562
C3563

2113740F25
2113740A67
2113741F49
2113741F49
2113740F29
2113741F29
2113741F49
2113740A67
2113740A67
2113740A67
2113741A33
2113740F37
2113740A67
2113741A33
2113741A57
2111078B38
2113740A67
2113740A67
2113740F34
2113740A67
2113740A67
2113741F25
2113741A33

LIGHT COMPONENTS SIDE

REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

C3564
C3565
C3567
C3568
C3569
C3570
C3571
C3572
C3583
C3602
C3603
C3604
C3605
C3606
C3608
C3609
C3610
C3612
C3613
C3614
C3616
C3619
C3620
C3621
C3623
C3624
C3625

2311049A45
2111078B49
2111078B49
2111078B41
2111078B59
2111078B59
2111078B36
2111078B21
2113741F49
2113741F17
2113741F49
2113741F49
2113741F17
2113741F25
2113743K15
2113741F49
2113741F17
2113741F49
2113741F17
2113741F49
2113741F49
2380090M24
2113741F17
2113741F17
2113741F17
2113741F17
2113741F17

DESCRIPTION

REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

C3626
C3641
C3642
C3661
C3662
C3663
C3664
C3666
C3667
C3672
C3673
C3674
C3675
C3676

2113741F49
2113741F25
2113741F25
2111078B18
2111078B32
2111078B32
2111078B18
2111078B59
2111078B59
2113741F25
2113740F35
2113741F25
2113740F29
2113741F25

0.01 uF
1000 pF
1000 pF
15 pF
39 pF
39 pF
15 pF
470 pF
470 pF
1000 pF
22 pF
1000 pF
12 pF
1000 pF

CR3601
CR3641
CR3642
CR3671
CR3673

4880222R01
4802482J02
4802482J02
4880236E05
4880236E05

Reverse Polarity
PIN
PIN
Hot Carrier
Hot Carrier

E3501

2602604Y01

J1
J2

0905901V06
0905902V04

DESCRIPTION

REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

DESCRIPTION

REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

Q3541
Q3561
Q3601

4813827A36
4805538W01
4813824A10

N-Channel FET (Note 3)
N-Channel FET (Note 3)
NPN

R3501
R3502
R3503
R3504
R3521
R3522
R3525
R3526
R3527
R3530
R3531
R3532
R3533
R3542
R3543
R3545
R3548
R3582
R3583
R3585
R3586
R3601
R3603

0662057A01
0662057A25
0662057A01
0662057A56
0662057A25
0662057A49
0660081A73
0660081A73
0683962T51
0662057A18
0662057A18
0605057A18
0662057A18
0683962T51
0680194M18
0660081A73
0662057A49
0662057A81
0660081A73
0662057A89
0660081A73
0662057C01
0662057A49

10
100
10
2K
100
1K
10K
10K
120
51
51
51
51
120
51
10K
1K
22K
10K
47K
10K
0
1K

DESCRIPTION

REFERENCE
SYMBOL

MOTOROLA
PART NUMBER

R3604
R3605
R3606
R3607
R3608
R3610
R3615
R3641
R3642
R3643
R3644
R3671
R3672
R3673
R3674
R3675
R3676
R3677

0662057A56
0662057A49
0662057A37
0662057A25
0662057A25
0680149M02
1705603W01
0662057A01
0662057A01
0680194M18
0680194M18
0662057A84
0662057A53
0683962T51
0662057A49
0662057A43
0662057A57
0662057A25

DESCRIPTION

NOTES:
1. All resistance values are in ohms unless indicated otherwise.

DESCRIPTION
CAPACITORS:

8.2 pF
330 pF
0.01 uF
0.01 uF
12 pF
1500 pF
0.01 uF
330 pF
330 pF
330 pF
3300 pF
27 pF
330 pF
3300 pF
0.033 uF
68 pF
330 pF
330 pF
20 pF
330 pF
330 pF
1000 pF
3300 pF

10 uF
180 pF
180 pF
91 pF
470 pF
470 pF
56 pF
20 pF
0.01 uF
470 pF
0.01 uF
0.01 uF
470 pF
1000 pF
0.1 uF
0.01 uF
470 pF
0.01 uF
470 pF
0.01 uF
0.01 uF
10 uF
470 pF
470 pF
470 pF
470 pF
470 pF

INDUCTORS:

Heat Spreader, RF
Power Amplifier

L3501
L3521
L3522
L3523
L3540
L3545
L3547
L3548
L3560
L3562
L3566
L3603
L3605
L3607
L3608
L3641
L3642
L3643
L3661
L3662
L3663
L3664
L3672

2460591N36
2460591C23
2462587T17
2460591B80
2460591B80
2460591C23
2460591B80
2460591B80
2484657R01
2460591M77
2460591M77
2484657R01
2484657R01
2484657R01
2484657R01
2462587T30
2484657R01
2462587T30
2460591W04
2460591W04
2460591W04
2462587T30
2462587T18

43.67 nH
13.85 nH
150 nH
19.61 nH
19.61 nH
13.85 nH
19.61 nH
19.61 nH
Ferrite Bead
38.13 nH
38.13 nH
Ferrite Bead
Ferrite Bead
Ferrite Bead
Ferrite Bead
1000 nH
Ferrite Bead
1000 nH
55nH
55nH
55nH
1000 nH
180 nH

CONNECTORS:
Antenna
DC Power

Q3501
Q3521

4813824A17
4813827A26

PNP
NPN

DIODES:

SHIELD:

TRANSISTORS:

RESISTORS:

2. Components shown on component location and schematic
diagrams but not included in parts list are not placed.
3. When replacing transistors Q3541 or Q3561, perform Q3541 or
Q3561 bias measurement and adjustment procedure on page
28.

PRINTED CIRCUIT
BOARD (For Reference
Only):

8402573Y06
and
8402573Y09

26
This document was created with FrameMaker 4.0.3

2K
1K
330
100
100
100K Thermistor
30 m Shunt
10
10
51
51
30K
1.5K
120
1K
560
2.2K
100

For Kit HUD4012D

Power Amplifier (Kit HUE4012D)
Component Locations and Parts List

DEPC-97139-O/None

Power Amplifier (Kit HUD4012D) Schematic Diagram
This document was created with FrameMaker 4.0.3

27

Q3541 Bias Measurement and Adjustment Procedure:

Q3561 Bias Measurement and Adjustment Procedure:

1. Disconnect A+ supply from radio.

1. Disconnect A+ supply from radio.

2. Remove resistor R3503 and ferrite bead L3607 from PCB.

2. Remove resistor R3503 and ferrite bead L3560 from PCB.

3. On PCB, tack solder wires onto pads for L3607 temporarily and connect the wires to a digital milliammeter.

3. On PCB, tack solder wires onto pads for L3560 temporarily and connect the wires to a digital milliammeter.

4. Reconnect A+ supply to radio. Set A+ supply to 13.6 volts, and current limit to 4.0 Amperes.

4. Reconnect A+ supply to radio. Set A+ supply to 13.6 volts, and current limit to 4.0 Amperes.

5. Key up transmitter and observe current indicated on milliammeter. If current is between 120 and 180
milliamperes, skip to step 14. Otherwise, proceed to step 6.

5. Key up transmitter and observe current indicated on milliammeter. If current is between 1400 and 2200
milliamperes, skip to step 14. Otherwise, proceed to step 6.

6. Dekey transmitter and disconnect A+ supply from radio.

6. Dekey transmitter and disconnect A+ supply from radio.

7. Remove trim resistors R3525 and R3526 from PCB.

7. Remove trim resistor R3545 from PCB.

8. Place a 10K Ohm resistor in place of R3525.

8. Place a 10K Ohm resistor in place of R3545.

9. Reconnect A+ supply to radio. Set A+ supply to 13.6 volts, and current limit to 4.0 Amperes.

9. Reconnect A+ supply to radio. Set A+ supply to 13.6 volts, and current limit to 4.0 Amperes.

10. Key up transmitter and observe current indicated on milliammeter. If current is between 120 and 180
milliamperes, skip to step 14. Otherwise, proceed to step 11.

10. Key up transmitter and observe current indicated on milliammeter. If current is between 1400 and 2200
milliamperes, skip to step 14. Otherwise, proceed to step 11.

11. Dekey transmitter and disconnect A+ supply from radio.

11. Dekey transmitter and disconnect A+ supply from radio.

Note

In step 12 and/or 13, if the required current level of 120- to 180-milliamperes cannot be obtained using a standard value resistor for R3525, place a resistor on pads
for R3526 to form a parallel resistance network with R3525. The parallel resistance
(R) of R3525 and R3526 is: R= R3525 * R3526/(R3525 + R3526).

Note

In step 12 and/or 13, if the required current level of 1400- to 2200-milliamperes
cannot be obtained using a standard value resistor for R3545, place a resistor on
pads for R3544 to form a parallel resistance network with R3545. The parallel
resistance (R) of R3544 and R3545 is: R= R3544 * R3544/R3544 + R3545.

12. If current observed in step 10 is less than 120 milliamperes, replace R3525 with next higher standard value
(i.e., 12K) and repeat steps 9 and 10. Otherwise, proceed to step 13.

12. If current observed in step 10 is less than 1400 milliamperes, replace R3545 with next higher standard value
(i.e., 12K) and repeat steps 9 and 10. Otherwise, proceed to step 13.

13. If current observed in step 10 is more than 180 milliamperes, replace R3525 with next lower standard value
(i.e., 9.1K) and repeat steps 9 and 10.

13. If current observed in step 10 is more than 2200 milliamperes, replace R3545 with next lower standard value
(i.e., 9.1K) and repeat steps 9 and 10.

14. Dekey transmitter, disconnect A+ supply from radio, and disconnect milliammeter wires from PCB.

14. Dekey transmitter, disconnect A+ supply from radio, and disconnect milliammeter wires from PCB.

15. Reinstall R3503 and L3607 on PCB.

15. Reinstall R3503 and L3560 on PCB.

28

1
Table 1: Schematic Diagram Interconnection List
From/To
Node

From/To

Signal Name

Schematic Diagram
Title

Publication

IF1-2-12

AUDIO_MOD

Main Controller Block
Diagram

68P81083C20

IF1-2-13

ROSC_SEL

Main Controller Block
Diagram

IF1-2-14

GND

IF1-2-15

Node

Signal Name

Schematic Diagram
Title

Publication

IF1-2-12

AUDIO_MOD

Receiver IF

68P81080C48

68P81083C20

IF1-2-13

ROSC_SEL

Receiver IF

68P81080C48

Main Controller Block
Diagram

68P81083C20

IF1-2-14

GND

Receiver IF

68P81080C48

9V3

Main Controller Block
Diagram

68P81083C20

IF1-2-15

9.3V

Receiver Front End
and Receiver IF

68P81080C48

IF1-2-16

PA_CNTL_LIM

Main Controller Block
Diagram

68P81083C20

IF1-2-16

Not Indicated

Receiver IF

68P81080C48

IF1-2-17

SQUELCH

Main Controller Block
Diagram

68P81083C20

IF1-2-17

SQUELCH

Receiver IF

68P81080C48

IF1-2-18

ZIF_SEL

Main Controller Block
Diagram

68P81083C20

IF1-2-18

ZIF_SEL

Receiver IF

68P81080C48

IF1-2-19

DUPLEX_SYN_SEL

Main Controller Block
Diagram

68P81083C20

IF1-2-19

Not Indicated

Receiver IF

68P81080C48

IF1-3-1

DUPLEX_LOCK_DET

Main Controller Block
Diagram

68P81083C20

IF1-3-1

Not Indicated

Receiver IF

68P81080C48

IF1-3-2

DISC

Main Controller Block
Diagram

68P81083C20

IF1-3-2

DISC

Receiver IF

68P81080C48

IF1-3-3

RSSI

Main Controller Block
Diagram

68P81083C20

IF1-3-3

RSSI

Receiver IF

68P81080C48

29

30
Table 1: Schematic Diagram Interconnection List
From/To
Node

From/To

Signal Name

Schematic Diagram
Title

Publication

IF1-3-4

SDATA

Main Controller Block
Diagram

68P81083C20

IF1-3-5

SCLK

Main Controller Block
Diagram

IF1-3-6

RX_CNTL_I_SRC

IF1-3-7

Node

Signal Name

Schematic Diagram
Title

Publication

IF1-3-4

SPI TX DATA

Receiver IF

68P81080C48

68P81083C20

IF1-3-5

CLK

Receiver IF

68P81080C48

Main Controller Block
Diagram

68P81083C20

IF1-3-6

Not Indicated

Receiver Front End

68P81080C48

GND

Main Controller Block
Diagram

68P81083C20

IF1-3-7

GND

Receiver IF

68P81080C48

IF1-3-8

2.1MHz

Main Controller Block
Diagram

68P81083C20

IF1-3-8

2.1MHz

Receiver IF

68P81080C48

IF1-3-9

GND

Main Controller Block
Diagram

68P81083C20

IF1-3-9

GND

Receiver IF

68P81080C48

IF1-3-10

SYN_SEL

Main Controller Block
Diagram

68P81083C20

IF1-3-10

SYN_SEL

Receiver IF

68P81080C48

IF1-3-11

LOCK_DET

Main Controller Block
Diagram

68P81083C20

IF1-3-11

LOCK_DET

Receiver IF

68P81080C48

IF1-3-30

Not Indicated

Synthesizer

68P81080C48

IF1-3-30

Not Indicated

Receiver IF

68P81080C48

IF2-2-6

A+

Synthesizer

68P81080C48

IF2-2-6

A+_CONT

Main Controller Block
Diagram

68P81083C20

IF2-2-7

V_FORWARD

Synthesizer

68P81080C48

IF2-2-7

V_FORWARD

Main Controller Block
Diagram

68P81083C20

IF2-2-8

V_DRIVE

Synthesizer

68P81080C48

IF2-2-8

V_CNTL

Main Controller Block
Diagram

68P81083C20

IF2-2-9

K9.1

Synthesizer

68P81080C48

IF2-2-9

K9V1

Main Controller Block
Diagram

68P81083C20

IF2-2-10

GND

Synthesizer

68P81080C48

IF2-2-10

GND

Table 1: Schematic Diagram Interconnection List
From/To
Node

From/To

Signal Name

Schematic Diagram
Title

Publication

IF2-2-12

GND

Synthesizer

68P81080C48

IF2-3-1

PA Temp

Synthesizer

68P81080C48

IF2-3-2

PA_CONTRL

Synthesizer

IF2-3-3

Current_Sense-

IF2-3-4

Node

Signal Name

Schematic Diagram
Title

Publication

IF2-3-1

PA_TEMP

Main Controller Block
Diagram

68P81083C20

68P81080C48

IF2-3-2

PA_CNTL

Main Controller Block
Diagram

68P81083C20

Synthesizer

68P81080C48

IF2-3-3

CURRENT_SENSE_-

Main Controller Block
Diagram

68P81083C20

Current_Sense+

Synthesizer

68P81080C48

IF2-3-4

CURRENT_SENSE_+

Main Controller Block
Diagram

68P81083C20

IF2-3-5

A+

Synthesizer

68P81080C48

IF2-3-5

A+_CONT

Main Controller Block
Diagram

68P81083C20

IF2-3-13

GND

Synthesizer

68P81080C48

IF2-3-14

GND

Synthesizer

68P81080C48

IF2-4-11

GROUND

Synthesizer

68P81080C48

IF2-4-11

GROUND

Main Controller Block
Diagram

68P81083C20

IF3-2-1

ZIF_SEL

Receiver IF

68P81080C48

IF3-2-1

ZIF_SEL

Receiver Back End

68P81080C48

IF3-2-6

SQUELCH

Receiver IF

68P81080C48

IF3-2-6

SQUELCH

Receiver Back End

68P81080C48

IF3-2-9

IF OUT

Receiver IF

68P81080C48

IF3-2-9

IF_OUT

Receiver Back End

68P81080C48

IF3-2-13

Not Indicated

Receiver Back End

68P81080C48

IF3-2-13

ZIF_ST_LOG

Receiver Back End

68P81080C48

IF3-3-2

CLK

Receiver IF

68P81080C48

IF3-3-2

CLK

Receiver Back End

68P81080C48

IF3-3-3

SPI TX DATA

Receiver IF

68P81080C48

IF3-3-3

SPI_TX_DATA

Receiver Back End

68P81080C48

IF3-3-4

DISC

Receiver IF

68P81080C48

IF3-3-4

DISC

Receiver Back End

68P81080C48

IF3-3-5

2.1MHz

Receiver IF

68P81080C48

IF3-3-5

2.1Mhz

Receiver Back End

68P81080C48

IF3-3-7

RSSI

Receiver IF

68P81080C48

IF3-3-7

RSSI

Receiver Back End

68P81080C48

31

32
Table 1: Schematic Diagram Interconnection List
From/To
Node

From/To

Signal Name

Schematic Diagram
Title

Publication

IF3-4-8

Not Indicated

Receiver Front End

68P81080C48

IF4-1-6

Mod In

Synthesizer

IF4-2-7

2.1 MHz

IF4-3-1

Node

Signal Name

Schematic Diagram
Title

Publication

IF3-4-8

RF_REG_5V

Receiver Back End

68P81080C48

68P81080C48

IF4-1-6

AUDIO MOD

Receiver IF

68P81080C48

Synthesizer

68P81080C48

IF4-2-7

2.1MHz

Receiver IF

68P81080C48

CLK

Synthesizer

68P81080C48

IF4-3-1

CLK

Receiver IF

68P81080C48

IF4-3-3

LOCK DET

Synthesizer

68P81080C48

IF4-3-3

LOCK_DET

Receiver IF

68P81080C48

IF4-3-4

FRACN CE

Synthesizer

68P81080C48

IF4-3-4

SYN_SEL

Receiver IF

68P81080C48

IF4-3-9

Data

Synthesizer

68P81080C48

IF4-3-9

SPI TX DATA

Receiver IF

68P81080C48

IF4-4-2

+9.3V

Synthesizer

68P81080C48

IF4-4-2

9.3V

Receiver IF

68P81080C48

IF4-4-5

PEND CE

Synthesizer

68P81080C48

IF4-4-5

ROSC_SEL

Receiver IF

68P81080C48

IF4-4-8

REG 5V

Synthesizer

68P81080C48

IF4-4-8

Regulated 5V

Receiver Front End

68P81080C48

IF5-1-1

GND

Receiver IF

68P81080C48

IF5-2-3

Jumper

Receiver IF

68P81080C48

IF5-3-3

GND

Receiver IF

68P81080C48

IF5-4-4

GND

Receiver IF

68P81080C48

IF7-1-11

SPK+

Main Controller Block
Diagram

68P81083C20

IF7-1-11

SPK+

Controller Power
Control

68P81083C20

IF7-1-12

SPK-

Main Controller Block
Diagram

68P81083C20

IF7-2-12

IF7-1-15

PA_CNTL

Main Controller Block
Diagram

68P81083C20

IF2-3-2

IF7-1-17

GND

Main Controller Block
Diagram

68P81083C20

IF7-1-17

GND

Controller Power
Control

68P81083C20

IF7-1-23

PWR_RST

Main Controller Block
Diagram

68P81083C20

IF7-1-23

PWR_RST

Controller Power
Control

68P81083C20

1F1-2-16

Table 1: Schematic Diagram Interconnection List
From/To
Node

From/To

Signal Name

Schematic Diagram
Title

Publication

IF7-1-31

TEMP_GND

Main Controller Block
Diagram

68P81083C20

IF7-2-3

V_CNTL

IF7-2-4

V_FORWARD

Main Controller Block
Diagram

IF7-2-7

UNSW_5V

IF7-2-8

Node

Signal Name

Schematic Diagram
Title

Publication

IF7-2-3

V_CNTL

Controller Power
Control

68P81083C20

68P81083C20

IF7-2-4

V_FORWARD

Controller Power
Control

68P81083C20

Main Controller Block
Diagram

68P81083C20

IF7-2-7

UNSW_5V

Controller Power
Control

68P81083C20

CL_UNSW_5V

Main Controller Block
DIagram

68P81083C20

IF7-2-8

CL_UNSW_5V

Controller Power
Control

68P81083C20

IF7-2-10

RX_AUDIO, IF7-4-10

Main Controller Block
Diagram

68P81083C20

IF7-2-12

SPK-, IF7-1-12

Main Controller Block
Diagram

68P81083C20

IF7-2-13

CURRENT_SENSE_+

Main Controller Block
Diagram

68P81083C20

IF7-2-13

CURRENT_SENSE_+

Controller Power
Control

68P81083C20

IF7-2-20

CLEAR

IF7-2-20

CLEAR

Controller Power
Control

68P81083C20

IF7-2-21

B+_IGNITION

Main Controller Block
Diagram

68P81083C20

IF7-2-21

B+_IGNITION

Controller Power
Control

68P81083C20

IF7-2-24

A+

Main Controller Block
Diagram

68P81083C20

IF7-2-25

A+_CONT

Main Controller Block
Diagram

68P81083C20

IF7-2-25

A+_CONT

Controller Power
Control

68P81083C20

IF7-2-26

9V3

Main Controller Block
DIagram

68P81083C20

IF7-2-26

9V3

Controller Power
Control

68P81083C20

IF7-2-27

SW_B+

Main Controller Block
Diagram

68P81083C20

IF7-2-27

SW_B+

Controller Power
Control

68P81083C20

33

34
Table 1: Schematic Diagram Interconnection List
From/To
Node

From/To

Signal Name

Schematic Diagram
Title

Publication

Node

Signal Name

Schematic Diagram
Title

Publication

IF7-2-28

Vdd

Main Controller Block
Diagram

68P81083C20

IF7-2-28

Vdd

Controller Power
Control

68P81083C20

IF7-2-29

SW_B+

Controller Power
Control

68P81083C20

IF7-2-27

IF7-2-30

9V4

IF7-2-30

9V3

Controller Power
Control

68P81083C20

IF7-3-5

K9V1

Main Controller Block
Diagram

68P81083C20

IF7-3-5

K9V1

Controller Power
Control

68P81083C20

IF7-3-6

PA_TEMP

Main Controller Block
Diagram

68P81083C20

IF7-3-6

PA_TEMP

Controller Power
Control

68P81083C20

IF7-3-14

CURRENT_SENSE -

Controller Power
Control

68P81083C20

IF2-3-3

IF7-3-15

PA_CNTL

Controller Power
Control

68P81083C20

IF2-3-2

IF7-3-18

Vaud

Main Controller Block
Diagram

68P81083C20

IF7-3-18

Vaud

Controller Power
Control

68P81083C20

IF7-3-22

+5V

Controller Power
Control

68P81083C20

IF7-4-22

IF7-4-1

VFWD_BUF

Main Controller Block
Diagram

68P81083C20

IF7-4-1

VFWD_BUF

Controller Power
Control

68P81083C20

IF7-4-2

VSUM

Main Controller Block
Diagram

68P81083C20

IF7-4-2

VSUM

Controller Power
Control

68P81083C20

IF7-4-9

AUPA_EN

Main Controller Block
Diagram

68P81083C20

IF7-4-9

AUPA_EN

Controller Power
Control

68P81083C20

1F7-4-10

RX_AUDIO

1F7-4-14

CURRENT_SENSE

1F7-4-16

A+

1F7-2-10
Main Controller Block
Diagram

68P81083C20

1F2-3-3

Table 1: Schematic Diagram Interconnection List
From/To

From/To

Node

Signal Name

Schematic Diagram
Title

Publication

Node

Signal Name

Schematic Diagram
Title

Publication

1F7-4-19

B+_ON_OFF

Main Controller Block
Diagram

68P81083C20

IF7-4-22

+5V

Main Controller Block
Diagram

68P81083C20

IF7-3-22,
IF7-4-24

A+

Controller Power
Control

68P81083C20

IF8-2-2

K9V1

Receiver Front End

69P81080C48

1F8-4-2

Synthesizer

68P81080C48

IF8-3-1

Rx Inj

Synthesizer

68P81080C48

IF8-3-1

Receiver Front End

68P81080C48

IF8-4-2

K9.1

Synthesizer

68P81080C48

1F9-2-9

Synthesizer

68P81080C48

IF9-2-6

A+

Power Amplifier

68P81080C48

IF9-2-6

A+

Synthesizer

68P81080C48

IF9-2-7

Not indicated

Power Amplifier

68P81080C48

IF9-2-7

V_FORWARD

Synthesizer

68P81080C48

IF9-2-8

V_DRIVE

Synthesizer

68P81080C48

IF2-2-8

IF9-2-9

Keyed 9.1V

Power Amplifier

68P81080C48

IF9-2-9

K9.1

Synthesizer

68P81080C48

IF9-2-10

GND

Power Amplifier

68P81080C48

IF9-2-10

GROUND

Synthesizer

68P81080C48

IF9-2-11

RF Input

Power Amplifier

68P81080C48

IF9-2-11

Tx Inj

Synthesizer

68P81080C48

IF9-3-1

PA TEMP

Power Amplifier

68P81080C48

IF9-3-1

PA Temp

Synthesizer

68P81080C48

IF9-3-2

PA_CNTL

Power Amplifier

68P81080C48

IF9-3-2

PA_CONTRL

Synthesizer

68P81080C48

IF9-3-3

Current Sense -

Power Amplifier

68P81080C48

IF9-3-3

Current_Sense-

Synthesizer

68P81080C48

IF9-3-4

Current Sense +

Power Amplifier

68P81080C48

IF9-3-4

Current_Sense+

Synthesizer

68P81080C48

IF9-3-5

A+

Power Amplifier

68P81080C48

IF9-3-5

A+

Synthesizer

68P81080C48

IF9-4-13

Not indicated

Power Amplifier

68P81080C48

IF9-4-13

Not Indicated

Synthesizer

68P81080C48

IF10-3-1

Not indicated

Power Amplifier

68P81080C48

IF10-3-1

Not Indicated

Receiver Front End

68P81080C48

Not Indicated

35

NOTES

36

We believe that reports from users provide valuable information for producing quality manuals.
By taking a few moments to answer the following questions as they relate to this specific manual, you can take an active role in the continuing effort to ensure that our manuals contain the
most accurate and complete information of benefit to you. Thank you for your cooperation.
In reference to Manual Number: 68P81080C48-C

Not Covered
in This Manual

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MCS 2000™ Mobile Radio
1. Please check all the appropriate boxes:

Complete

Cut along dotted line

SERVICE MANUAL QUESTIONNAIRE

Disassembly
Procedures
Alignment
Procedures
Exploded
Views
Schematic
Diagrams
Circuit Board
Details
Electrical Parts
Lists
Exploded View
Parts List

2. How would you rate the overall organization of this manual?
excellent

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3. Did this Service manual provide you with the information necessary to service and maintain
the specific equipment?
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4. How do you rate this particular Service Manual?
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5. We would appreciate any corrections or recommendations for improving this manual. Please
include the specific page number(s) of the diagram or procedure in question.
a. Disassembly Procedures:(Page No. __________ )
b. Alignment Procedures:(Page No. __________ )
c. Exploded Views:(Page No. __________ )

NO POSTAGE
NECESSARY
IF MAILED
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FOLD
(Continued)

FOLD

Please specify the page number along with any corrections or recommendations for improvement.
d. Schematic Diagrams: (Page No. __________ )
e. Component Location Details: (Page No. __________ )
f. Electrical Parts List: (Page No. __________ )
g. Exploded View Parts List: (Page No. __________ )
6. General comments/suggestions:

Name:............................................................................................................................................
Company: ......................................................................................................................................
Customer
COSC
MSS
FTR
Other
Address: ........................................................................................................................................
City/State/Zip:................................................................................................................................
Phone Number (Please include Area Code): ................................................................................
PLEASE USE TAPE TO SEAL
POSTAL REGULATIONS PROHIBIT USE OF STAPLES

REPLACEMENT PARTS ORDERING
ORDERING INFORMATION
When ordering replacement parts or equipment
information, the complete identification number
should be included. This applies to all components,
kits, and chassis. If the component part number is
not known, the order should include the number of
the chassis or kit of which it is a part, and sufficient
description of the desired component to identify it.

Crystal and channel element orders should specify
the crystal or channel element type number, crystal
and carrier frequency, and the model number in
which the part is used.

MAIL ORDERS
Send written orders to the following addresses:
Replacement Parts/
Test Equipment/Manuals/
Crystal Service Items:

Federal Government Orders:

International Orders:

Motorola Inc.
United States and Canada
Accessories and Aftermarket
Division
Attention: Order Processing
1313 E. Algonquin Road
Schaumburg, IL 60196

Motorola Inc.
United States and Canada
Accessories and Aftermarket
Division
Attention: Order Processing
7230 Parkway Drive
Landover, MD 21076

Motorola Inc.
United States and Canada
Accessories and Aftermarket
Division
Attention: International Order
Processing
1313 E. Algonquin Road
Schaumburg, IL 60196

TELEPHONE ORDERS
United States and Canada Accessories and Aftermarket Division:
Call:
1-800-422-4210
1-800-826-1913 (For Federal Government Orders)
1-847-538-8023 (International Orders)

Servicers Training (VHS Video Tapes):
Call:
847-576-2828

FAX ORDERS
United States and Canada Accessories and Aftermarket Division:
FAX:
847-538-8198 (Domestic)
847-576-3023 (International)
Parts ID:
847-538-8194
PARTS CUSTOMER SERVICE
United States and Canada Accessories and
Aftermarket Division:
Call: 1-800-422-4210
Parts Identification:
Call: 847-538-0021

Federal Government Orders:
FAX:
410-712-4991
International:
410-712-6200

PRODUCT CUSTOMER SERVICE
Customer Response Center
(Sales and Service Assistance):
Call: 1-800-247-2346
FAX: 1-800-232-9272

TEPF-9679-T
1

MCS 2000 Mobile Radio Service Instructions
VHF Frequency Range, 25W Specific
Publication Number 68P81080C48-O

*6881080C48-O*

6881080C48-O
Source Exif Data: 
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File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : Yes
Author                          : Motorola
Create Date                     : 1999:01:19 17:14:00Z
Keywords                        : 25W, VHF, Frequency, Range, Specific, Information
Modify Date                     : 2011:07:04 07:37:36-04:00
Subject                         : Service Manual
XMP Toolkit                     : Adobe XMP Core 5.2-c001 63.139439, 2010/09/27-13:37:26
Format                          : application/pdf
Creator                         : Motorola
Description                     : Service Manual
Title                           : MCS 2000 VHF 25W Mobile
Metadata Date                   : 2011:07:04 07:37:36-04:00
Producer                        : Acrobat Distiller 3.0 for Power Macintosh
Document ID                     : uuid:a14084c5-8b1c-4419-8fd3-9bf29775f3ea
Instance ID                     : uuid:6fc7efcc-bd62-42a7-85f7-1c2d33b01ac6
Page Layout                     : SinglePage
Page Mode                       : UseOutlines
Page Count                      : 48
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