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

User Manual: -MCS2000/MCS2000 service manual vol-2g 6881080C48-O

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68P81080C48-O, Issued 12/98

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.

Safety 0

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

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

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.

Safety 1

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

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.

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

!

W A R N I N G

!

Safety 2

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.

List of Effective Pages A

LIST OF EFFECTIVE PAGES

MCS 2000 Mobile Radio Service Instructions

Volume 2g

VHF Frequency Range, 25W Specific Information

Motorola Publication Number 68P81080C48-O

I

ssue Dates of Original and Revised Pages are:

Revision O: December1998

The Number of pages in this publication is 50 consisting of the

following:

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.

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

B

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 lower than

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.

Table of Contents i

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

ii List of Figures

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

.

Introduction 1

Introduction

1

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

2 Introduction

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.

Theory of Operation 3

Theory of

Operation

2

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.

4 Theory of Operation

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 transmit-

ter 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 super-

heterodyne 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 synthesiz-

er 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.

Theory of Operation 5

RECEIVER

RECEIVE

RF SIGNAL

RECEIVE RF SIGNAL

RECEIVER

FRONT END

SECTION

RECEIVER IF

SECTION

RECEIVER

AUDIO AUDIO

SIGNAL

FILTER

(ASFIC)

AUDIO PA

ENABLE

SQUELCH

DETECT

RECEIVER

AUDIO RECEIVER

AUDIO

POWER

AMPLIFIER

RECEIVER

BACK END

SECTION

(ZERO IF) SQUELCH

FIRST

RECEIVER

LOCAL

OSCILLATOR

2.1 MHz

REFERENCE

OSCILLATOR

IF IF

LOUDSPEAKER

P/O CONTROLLER SECTION (NOTE 1)

DC POWER CONTROL AND REGULATION

13.8VDC

FROM VEHICLE

BATTERY OR

BASE STATION

POWER SUPPLY

CONTROL AND

REGULATION

CIRCUITS

REGULATED

DC POWER

P/O CONTROLLER SECTION

(NOTE 1)

TO TRANSCEIVER BOARD AND

CONTROL HEAD CIRCUITS

P/O CONTROLLER

SECTION

(NOTE 1)

AUDIO

SIGNAL

FILTER

(ASFIC)

AUDIO

MODULATION

SIGNAL SYNTHESIZER

SECTION

MEMORY

RF

POWER

CONTROL

FEEDBACK

CONTROL

SB9600

DATA BUS

ACCESSORY

INPUTS AND

OUTPUTS

2.1 MHz

REFERENCE

OSCILLATOR

CENTRAL

PROCESSOR

UNIT (CPU)

SUPPORT

LOGIC

(SLIC)

RF POWER

AMPLIFIER

TRANSMIT

RF SIGNAL

POWER

DETECTOR

AND

ANTENNA

SWITCH

ANTENNA

TRANSMITTER POWER AMPLIFIER SECTION

FIRST RECEIVER

LOCAL OSCILLATOR,

2.1 MHz

REFERENCE OSCILLATOR

TRANSMITTER

INJECTION

SIGNAL SERIAL

PERIPHERAL

INTERFACE

(SPI) BUS

AUDIO PA

ENABLE

TRANSMITTER

MICROPHONE

PUSH TO

TALK (PTT)

OPERATOR

KEYBOARD,

PUSHBUTTONS,

AND OTHER

CONTROLS

MICROPHONE

AUDIO

CONTROL HEAD

PROCESSOR OPERATOR

DISPLAY

DISPLAY DATA

1. REFER TO VOLUME 1 OF THIS

SERVICE MANUAL FOR INFORMATION

ABOUT CONTROLLER SECTION.

NOTES:

2. REFER TO VOLUME 1 OF THIS

SERVICE MANUAL FOR INFORMATION

ABOUT CONTROL HEAD.

OPERATOR INTERFACE (CONTROL HEAD - NOTE 2)

MAEPF-26567-B

P/O CONTROLLER

SECTION (NOTE 1)

HARMONIC

FILTER

Figure 1 . Overall Radio Functional Block Diagram

6 Theory of Operation

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.

Theory of Operation 7

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 Band-

pass 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 P

inj

(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.

8 Theory of Operation

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 non-

linear 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.

Theory of Operation 9

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-to-

digital (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.

10 Theory of Operation

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

Theory of Operation 11

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

12 Theory of Operation

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 N-

Channel 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

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

Theory of Operation 13

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.

14 Theory of Operation

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.

Reference Drawings 15

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.

Referen

16 Reference Drawings

Figure 2 Transceiver Board Section Locations

TRANSMITTER PA

CONTROLLER

AUDIO AND POWER

REGULATION

SYNTHESIZER

RECEIVER

IF

RECEIVER

BACK END

RECEIVER

FRONT END

CONTROLLER

COMMON

MAEPF-26504-O

Reference Drawings 17

NOTES

18

RESISTORS:

R3301 0662057A97 100K

R3302 0662057A65 4700

R3303 0662057A73 10K

R3304 0662057A73 10K

R3305 0662057A18 51

R3306 0662057A73 10K

R3307 0662057A35 270

R3308 0662057A41 470

R3309 0662057A09 22

R3310 0662057A35 270

R3311 0662057C19 4.7

R3312 0662057A01 10

R3313 0662057A49 1000

R3330 0662057A61 3300

R3341 0662057A18 51

R3343 0662057A35 270

R3344 0662057A09 22

R3345 0662057A35 270

TRANSFORMERS:

T3301 2505515V03 4:1 BALUN

T3302 2505515V03 4:1 BALUN

T3303 2505515V07 4:1 BALUN

Printed Circuit Board

(For Reference Only):

8402573Y06

and

8402573Y09

For Kit HUD4012D

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

CAPACITORS:

C3301 2113741F49 0.01 uF

C3302 2113741F25 1000 pF

C3303 2113740F45 56 pF

C3304 2113740F15 3.3 pF

C3306 2113740F51 100 pF

C3307 2113740F51 100 pF

C3308 2113740F51 100 pF

C3309 2113743K15 0.1 uF

C3310 2113741F25 1000 pF

C3312 2113740F51 100 pF

C3313 2113741F49 0.01 uF

C3314 2113743K15 0.1 uF

C3315 2113741F25 1000 pF

C3316 2113741F13 330 pF

C3317 2113741F13 330 pF

C3320 2113740F33 18 p F

C3321 2113740F24 7.5 pF

C3322 2113740F21 5.6 pF

C3323 2113740F18 4.3 pF

C3324 2113740F25 8.2 pF

C3325 2113740F20 5.1 pF

C3326 2113740F18 4.3 pF

C3327 2113740F22 6.2 pF

C3329 2113740F42 43 pF

C3330 2113740F45 56 pF

C3331 2113741F17 470 pF

C3332 2113741F17 470 pF

C3334 2113740F42 43 pF

C3336 2113740F15 3.3 pF

C3340 2113741F25 1000 pF

C3341 2113741F25 1000 pF

C3342 2113741F49 0.01 uF

C3343 2113741F49 0.01 uF

C3346 2113741F49 0.01 uF

C3348 2113741F49 0.01 uF

DIODES:

CR3301 4813833C02 Dual, 70V, Common

Cathode

CR3302 4802081B58 Dual, Varicap

CR3303 4880154K03 Dual, Schottky Mixer

CR3330 4880142L01 PIN

SHIELDS:

E3301 2602474Y01 Preselector

INDUCTORS:

L3301 2462587T30 1000 nH

L3302 2462587T12 56 nH

L3304 2460591L29 16.03 nH, Airwound

L3305 2460591L29 16.03 nH, Airwound

L3306 2460591L29 16.03 nH, Airwound

L3307 2460591L29 16.03 nH, Airwound

L3308 2462587T30 1000 nH

L3309 2462587T30 1000 nH

L3320 2462587T16 120 nH

L3321 2462587T16 120 nH

L3322 2462587T16 120 nH

L3323 2462587T16 120 nH

L3325 2462587T12 56 nH

L3340 2462587T30 1000 nH

TRANSISTORS:

Q3301 4813824A17 PNP

Q3302 4882971R01 NPN

RECEIVER FRONT END PARTS LIST

C3348

C3343

R3345

R3343

C3341

L3325

R3309

R3307

R3305

C3314

R3313

R3312

E3301

C3304

CR3302

L3305

L3302

MAEPF-26494-O

L3306

CR3303

C3303

L3307 L3304

C3316

L3320

C3321

C3320

L3323

L3321

C3322

C3324

C3342

C3326

C3333

C3329

C3334

C3328

C3325

L3322

C3315 R3310

C3336

L3308

C3312

R3301

C3308

C3317

C3310

R3306

Q3302

C3306

C3307

C3302

C3311

R3308

R3311

C3323

C3340

L3324

C3327

R3340

R3341

C3330

C3347

C3346

R3344

T3303

T3301

T3302

HEAVY COMPONENTS SIDE

MAEPF-26495-O

C3331

R3330

C3301

C3309

R3304

C3313

Q3301

C3332

CR3330

CR3301

R3303

R3302

L3301

L3309

Q3303

LIGHT COMPONENTS SIDE

Receiver Front End (Kit HUD4012D)

Component Locations and Parts List

RECEIVER FRONT END COMPONENT LOCATIONS

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.

This document was created with FrameMaker 4.0.3

19

9.3V

N.U.

IF_IN

(TO RECEIVER IF)

RX INJ

REG 5V

9.3V IF4-4-2

E3301

63A81090C56-O

Receiver Front End (Kit HUD4012D) Schematic Diagram

This document was created with FrameMaker 4.0.3

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

20

FILTERS:

Y3401 4805846W01 Crystal, 44.85 MHz

Y3402 4805846W03 Crystal, 44.85 MHz

PRINTED CIRCUIT

BOARD (For

Reference Only):

8402573Y06

and

8402573Y09

For Kit HUD4012D

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

C3402

R3410

CR3402

L3407

R3412

C3418

C3411

C3417

C3414

C3416 R3409

C3409

L3406

C3419

R3403

MAEPF-26496-O

L3402

Y3401 Y3402

L3401

C3401

R3401

C3335

R3404

C3407

C3403

L3403

R3408

R3405

R3414 R3413

R3406

R3402

C3415

R3415

CR3401 C3408

C3410

C3412

L3404

C3404

C3405

R3411

C3413

C3406 Q3401

MAEPF-26497-O

C3361

C3305

C3351

L3340

C3364

L3351

L3350

C3420

C3360

Q3402

C3350

C3363

C3352

C3353

C3354

C3357

C3358

C3355

C3359

Receiver IF (Kit HUD4012D)

Component Locations and Parts List

RECEIVER IF COMPONENT LOCATIONS

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

CAPACITORS:

C3305 2113741F49 0.01 uF

C3335 2113740F18 4.3 pF

C3350 2113740F51 100 pF

C3351 2113740F51 100 pF

C3352 2113740F51 100 pF

C3353 2113740F51 100 pF

C3355 2113740F51 100 pF

C3357 2113740F51 100 pF

C3358 2113741F58 100 pF

C3359 2113741F49 0.01 uF

C3360 2113740F51 100 pF

C3361 2113740F51 100 pF

C3401 2113740F24 7.5 pF

C3402 2113740F25 8.2 pF

C3403 2113740F31 15 pF

C3404 2113743A19 0.1 uF

C3405 2113740F24 7.5 pF

C3406 2113741F49 0.01 uF

C3407 2113740F51 100 pF

C3408 2113741F49 0.01 uF

C3409 2113741F49 0.01 uF

C3410 2113740F15 3.3 pF

C3411 2113741F13 330 pF

C3412 2113740F25 8.2 pF

C3413 2113741F25 1000 pF

C3414 2113740F09 1.8 pF

C3415 2113740F09 1.8 pF

C3416 2113740F27 10 pF

C3417 2113740F45 56 pF

C3418 2113740F31 15 pF

C3419 2113740F44 51 pF

DIODES:

CR3401 4880142L01 PIN

CR3402 4880154K03 Dual Schottky Mixer

INDUCTORS:

L3401 2462587T30 1000 nH

L3402 2462587T30 1000 nH

L3403 2462587T30 1000 nH

L3404 2462587T30 1000 nH

L3406 2462587T30 1000 nH

L3407 2462587T30 1000 nH

TRANSISTORS:

Q3303 5105625U28 Mixer, Integrated Circuit

Q3401 4882022N70 NPN

RESISTORS:

R3401 0662057A18 51

R3402 0662057A18 51

R3403 0662057A73 10K

R3404 0662057A73 10K

R3405 0662057A35 270

R3406 0662057A39 390

R3408 0662057A01 10

R3409 0662057A49 1000

R3410 0662057A59 2700

R3411 0662057A41 470

R3412 0662057A53 1500

R3413 0662057A39 390

R3414 0662057A01 10

R3415 0662057A73 10K

RECEIVER IF PARTS LIST

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.

HEAVY COMPONENTS SIDE

LIGHT COMPONENTS SIDE

This document was created with FrameMaker 4.0.3

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

21

N.U. N.U.

N.U.

N.U.

9.3V

9.3V

9.3V

N.U.

N.U. 47k

47k

IF_IN

(FROM RECEIVER

FRONT END)

63A81090C57-O

N.U.

Receiver IF (Kit HUD4012D)Schematic Diagram

This document was created with FrameMaker 4.0.3

22

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

CAPACITORS:

C3201 2113743K15 0.1 uF

C3202 2113740F51 100 pF

C3203 2113743K15 0.1 uF

C3204 2113743A23 0.22 uF

C3205 2113743K15 0.1 uF

C3206 2113743K15 0.1 uF

C3207 2113743A23 0.22 uF

C3208 2113743K15 0.1uF

C3209 2113743K15 0.1uF

C3210 2113740F41 39 pF

C3211 2113743A19 0.1uF

C3212 2113743A23 0.22uF

C3213 2113743A23 0.22uF

C3214 2113741A51 0.018 uF

C3215 2311049A02 0.15 uF

C3216 2113743K15 0.1 uF

C3217 2113740F37 27 pF

C3218 2113740F41 39 pF

C3219 2113740F42 43 pF

C3220 2109720D14 0.1 uF

C3221 2113741F17 470 pF

C3222 2109720D14 0.1 uF

C3223 2113743K15 0.1 uF

C3224 2113743K15 0.1 uF

C3225 2113743K15 0.1 uF

C3229 2311049J23 10 uF

C3230 2113743K15 0.1uF

C3231 2113741F25 1000 pF

C3232 2113743K15 0.1uF

C3234 2113740F19 4.7 pF

C3243 2113743K15 0.1uF

C3245 2113743K15 0.1uF

C3246 2113743K15 0.1uF

C3247 2113741F49 0.01 uF

C3249 2113740F15 3.3 pF

C3250 2113740F22 6.2 pF

DIODES:

CR3201 4862824C01 Varactor

CR3203 4805129M96 Dual

CR3204 4880154K03 Dual Schottky Mixer

SHIELD:

E3201 2605261V01 ZIF

INDUCTORS:

L3204 2462587T23 470 nH

L3205 2462587Q44 560 nH

L3207 2462587T23 470 nH

L3208 2462587T30 1000 nH

TRANSISTORS:

Q3201 4882022N70 NPN

Q3203 4882022N70 NPN

RECEIVER BACK END PARTS LIST

RESISTORS:

R3201 0662057A89 47K

R3202 0662057A89 47K

R3203 0662057A80 20K

R3204 0662057A59 2.7K

R3205 0662057A59 2.7K

R3206 0662057A59 2.7K

R3209 0662057A53 1.5K

R3210 0662057B47 0

R3211 0662057A84 30K

R3212 0662057A73 10K

R3215 0662057B05 200K

R3216 0662057A42 510

R3217 0662057A53 1.5K

R3218 0662057A53 1.5K

R3219 0662057A65 4.7K

R3220 0662057A81 22K

R3221 0662057A53 1.5K

R3222 0662057A73 10K

R3223 0662057A77 15K

INTEGRATED CIRCUITS:

U3201 5186296A02 Zero IF, F91 P-3

PRINTED CIRCUIT

BOARD (For

Reference Only):

8402573Y06

and

8402573Y09

For KIt HUD4012D

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

C3247

C3249

C3250

R3219

R3220

C3248

R3205

R3206

C3234

C3218

L3204

C3231

C3225

R3223

R3210

R3212

R3211

Q3203 L3207

CR3203

E3201

R3201

R3202

C3217

MAEPF-26498-O

C3210

C3229

C3232

Q3201

C3219 R3203

CR3201

R3221

R3209

C3243 R3222

C3203

CR3202

C3246

L3208

MAEPF-26499-O

U3201

R3224

C3216 C3222

R3215

C3221

C3220

C3213

C3212

C3207

C3245

C3211

R3217

C3230 C3205

C3201

C3202

L3205

R3216

R3218

C3224

C3204

C3208

C3209 C3206 CR3204 C3223

C3214

R3204

C3215

Receiver Back End (Kit HUD4012D)

Component Locations and Parts List

RECEIVER BACK END COMPONENT LOCATIONS

HEAVY

COMPONENTS

SIDE

LIGHT

COMPONENTS

SIDE

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.

This document was created with FrameMaker 4.0.3

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

23

DEPC-97142-O/None

Receiver Back End (Kit HUD4012D) Schematic Diagram

This document was created with FrameMaker 4.0.3

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

24

R5777 0662057A09 22

R5778 0662057A59 2.7K

R5779 0662057A49 1K

R5780 0662057A09 22

R5781 0662057A13 33

R5782 0662057A29 150

R5783 0662057A15 39

R5784 0662057A29 150

R5786 0662057A13

33

R5787 0662057A56 2K

R5788 0662057A49 1K

R5789 0662057A29 150

R5790 0662057A29 150

R5791 0662057A29 150

R5792 0662057A15 39

R5793 0662057A29 150

R5850 0662057A89 47K

R5851 0662057A89 47K

R5866 0662057B47 0

INTEGRATED CIRCUITS:

U5800 5105279V38 Oscillator, 16.8 MHz

U5801 5105457W73 FRACTN

U5802 5113816A07 Regulator, 5 VDC,

500 mA

ZENER DIODE:

VR5750 481380A23 10 VDC, 225 mW

PRINTED CIRCUIT

BOARD (For reference

only):

8402573Y06

and

8402573Y09

For kit HUD4012D

REFERENCE

SYMBOL MOTOROLA

PART NO. DESCRIPTION

CR3804

C3864

R3802

C3866 CR3801

L3812

Q3802

C3883

CR3807

C3865

L3801

L3802

L3806

C3869

C3870

L3814

L3810

L3811

C3886

Q3805

R3811

C3876

C3873 R3807

R3810

R3804

C3875

C3874

Q3803

Q3804

L3813

L5794

R5792

C3888

C3862

C3868

C3882

C3872

R3816

L3805

CR3805

C3889

CR3806

C3863

C3871

R3803

R3801

R3805

C3880

C3884

R3806

C3881

R3808

C3877

R3809

L3809

C3878

R5789

C5802

R5790

R5788

R5784

C5796

C5797

C5803

C5804

C5807

R5791

R5793

C5799

L5793

R5787 C5798

R5782

L5791

C5793

C5795

Q5801

C5792

C5789

R5777

C5773

C5767

C5766

C5765

R5767

C5772

C5763

C5751

C5791

MAEPF-26500-O

R5769

R5770

C5774

R5768

Q5774

C5857

R5855

C5856 CR5751

C5754

C5790

C5750

R5750 C5855

R5854

R5779

R5778

R5783

R5776

R5774

R5775

C3879

R5780

L5792

C5794

R5781

E5702

E5704

L5765

VR5750

R5773

R5771

U5800

Y5700

U5802

C5778

VIEWED FROM SIDE 1

R5772

Q5802

Q3801

CR3802

CR3803

C3861

VIEWED

FROM

SIDE

2

MAEPF-26501-O

C5779

R5762

C5780

Q5751

C5853

R5850

C5850

Q5750

L3815

C5776

C5775

R5760

R5761

CR5750

C5769

C5760

R5759

C5753 C5764

Q5770

C5810

R5797

R5765

C5782

R3815

C5800

C5805

R5766

R5763

R5753

R5756

R5758

C5851

R5752

R5796

R5754

R3812

C5771 Q3806

Q3807

C5781

C5761

C5752

C5758

R3817

U5801

C5756

E5705

C5777

R5851

R5866 C5757

C5755

C5759

L5759

C5762

C5854

C3892

C5768

R5798

R5795

C3891

R3814

C5808

R5786

C5809

R3813

R5764

Q5775

C5770

R5757

C3890

R5853

R5852

R5794

SYNTHESIZER COMPONENT LOCATIONS

HEAVY COMPONENTS SIDE

REFERENCE

SYMBOL MOTOROLA

PART NO. DESCRIPTION

CAPACITORS:

C3861 2113741F17 470 pF

C3862 2113740F42 43 pF

C3863 2113740F37 27 pF

C3864 2113740F27 10 pF

C3865 2113740F27 10 pF

C3866 2113741F17 470 pF

C3868 2113740F45 56 pF

C3869 2113740F39 33 pF

C3870 2113740F27 10 pF

C3871 2113740F29 12 pF

C3872 2113741F17 470 pF

C3873 2113740F18 4.3 pF

C3874 2113740F18 4.3 pF

C3875 2113741F17 470 pF

C3876 2113741F17 470 pF

C3877 2113741F17 470 pF

C3878 2113740F29 12 pF

C3879 2113740F34 20 pF

Synthesizer (Kit HUD4012D)

Component Locations and Parts List

C3880 2113740F21 5.6 pF

C3881 2113741F17 470 pF

C3882 2113740F07 1.5 pF

C3883 2113740F25 8.2 pF

C3884 2113741F17 470 pF

C3886 2113740F29 12 pF

C3888 2113743K15 0.1 uF

C3889 2113740F35 22 pF

C3890 2113741F17 470 pF

C3891 2113741F17 470 pF

C3892 2113740F45 56 pF

C5750 2113741F49 0.01 uF

C5751 2113743E07 0.022 uF

C5752 2113741F49 0.01 uF

C5753 2113743K07 0.047 uF

C5754 2113743E07 0.022 uF

C5755 2311049A19 10 uF

C5756 2113741F49 0.01 uF

C5757 2113743K15 0.1 uF

C5758 2113743K15 0.1 uF

C5759 2113743K15 0.1 uF

REFERENCE

SYMBOL MOTOROLA

PART NO. DESCRIPTION

C5760 2113743K15 0.1 uF

C5761 2113741F25 1000 uF

C5762 2113743E07 0.022 uF

C5763 2113741F49 0.01 uF

C5764 2311049J23 10 uF

C5765 2113743K15 0.1 uF

C5766 2311049J26 10 uF

C5767 2113743K15 0.1 uF

C5768 2113740F51 100 pF

C5769 2113741F25 1000 pF

C5770 2311049J26 10 uF

C5771 2113741F25 1000 pF

C5772 2113741F25 1000 pF

C5773 2113741F49 0.01 uF

C5774 2113741F49 0.01 uF

C5775 2109720D14 0.1 uF

C5776 2109720D14 0.1 uF

C5778 0811051A19 1 uF

C5780 2113741F25 1000 pF

C5781 2311049A07 1 uF

C5782 2113741F25 1000 pF

C5789 2113743K15 0.1 uF

C5790 2113743K15 0.1 uF

C5791 2311049J11 4.7 uF

C5792 2113743K15 0.1 uF

C5793 2113741F25 1000 pF

C5794 2113741F17 470 pF

C5795 2113740F31 15 pF

C5796 2113740F27 10 pF

C5797 2113741F17 470 pF

C5798 2113741F17 470 pF

C5799 2113741F25 1000 pF

C5800 2113743K15 0.1 uF

C5802 2113741F17 470 pF

C5803 2113740F29 12 pF

C5807 2113741F25 1000 pF

C5808 2113740F51 100 pF

C5809 2113741F25 1000 pF

C5850 2113743A19 0.1 uF

C5853 2113740F51 100 pF

DIODES:

CR3801 4880236E05 Hot Carrier

CR3802 4880236E05 Hot Carrier

CR3803 4805649Q13 Varactor

CR3804 4805649Q13 Varactor

CR3805 4805649Q13 Varactor

CR3806 4805649Q13 Varactor

CR3807 4805649Q13 Varactor

CR5750 4802233J09 Triple

SHIELDS:

E3801 2602641Y01 VCO

E5702 2602660J02

E5704 2605259V01

E5705 2602658J02

INDUCTORS:

L3801 2462587T30 1000 nH

L3802 2462587T30 1000 nH

L3804 0105950T44 Helical Coil, Square

L3805 2462587T30 1000 nH

L3806 2462587T20 270 nH

L3808 0105950T45 Helical Coil, Square

L3809 2462587T30 1000 nH

REFERENCE

SYMBOL MOTOROLA

PART NO. DESCRIPTION

L3810 2462587T13 68 nH

L3811 2462587T12 56 nH

L3812 2462587T13 68 nH

L3813 2462587T30 1000 nH

L3814 2462587T30 1000 nH

L3815 2462587T20 270 nH

L5765 L2462587T17 150 nH

L5791 2462587T16 120 nH

L5792 2462587T12 56 nH

L5793 2462587T16 120 nH

L5794 2462587T13 68 nH

TRANSISTORS:

Q3801 4813824A10 NPN

Q3802 4813824A10 NPN

Q3803 4813823A05 N-Channel RFJFET

Q3804 4813823A05 N-Channel RF JFET

Q3805 4882022N70 NPN

Q3806 4880048M01 NPN

Q3807 4880048M01 NPN

Q5750 4813824A17 PNP

Q5770 4813824A17 PNP

Q5774 4882022N70 NPN

Q5801 4882022N70 NPN

Q5802 4813827A26 NPN

RESISTORS:

R3801 0662057A83 27K

R3802 0662057A33 220

R3803 0662057A83 27K

R3804 0662057A25 100

R3805 0662057A39 390

R3806 0662057A15 39

R3807 0662057A15 39

R3808 0662057A59 2.7K

R3809 0662057A59 2.7K

R3810 0662057A77 15K

R3811 0662057A43 560

R3812 0662057A59 2.7K

R3813 0662057A59 2.7K

R3814 0662057A59 2.7K

R3815 0662057A59 2.7K

R3816 0662057A18 51

R3817 0662057A43 560

R5750 0662057A65 4.7K

R5752 0662057B02 150K

R5753 0662057B02 150K

R5754 0662057A53 1.5K

R5758 0662057A57 2.2K

R5759 0662057A35 270

R5760 0662057A49 1K

R5761 0662057A25 100

R5762 0662057A41 470

R5763 0662057A59 2.7K

R5764 0662057A53 1.5K

R5766 0662057B02 150K

R5767 0662057A35 270

R5768 0662057A59 2.7K

R5769 0662057A49 1K

R5770 0662057B47 0

R5771 0662057A43 560

R5772 0662057A18 51

R5773 0662057A25 100

R5774 0662057A09 22

R5775 0662057A35 270

R5776 0662057A35 270

REFERENCE

SYMBOL MOTOROLA

PART NO. DESCRIPTION

LIGHT COMPONENTS SIDE

SYNTHESIZER PARTS LIST

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

This document was created with FrameMaker 4.0.3

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

25

63A81090C73-O

Synthesizer (Kit HUD4012D) Schematic Diagram

This document was created with FrameMaker 4.0.3

26

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

CAPACITORS:

C3501 2113740F25 8.2 pF

C3502 2113740A67 330 pF

C3504 2113741F49 0.01 uF

C3505 2113741F49 0.01 uF

C3521 2113740F29 12 pF

C3522 2113741F29 1500 pF

C3523 2113741F49 0.01 uF

C3524 2113740A67 330 pF

C3526 2113740A67 330 pF

C3528 2113740A67 330 pF

C3529 2113741A33 3300 pF

C3530 2113740F37 27 pF

C3541 2113740A67 330 pF

C3542 2113741A33 3300 pF

C3543 2113741A57 0.033 uF

C3545 2111078B38 68 pF

C3547 2113740A67 330 pF

C3548 2113740A67 330 pF

C3553 2113740F34 20 pF

C3554 2113740A67 330 pF

C3561 2113740A67 330 pF

C3562 2113741F25 1000 pF

C3563 2113741A33 3300 pF

C3564 2311049A45 10 uF

C3565 2111078B49 180 pF

C3567 2111078B49 180 pF

C3568 2111078B41 91 pF

C3569 2111078B59 470 pF

C3570 2111078B59 470 pF

C3571 2111078B36 56 pF

C3572 2111078B21 20 pF

C3583 2113741F49 0.01 uF

C3602 2113741F17 470 pF

C3603 2113741F49 0.01 uF

C3604 2113741F49 0.01 uF

C3605 2113741F17 470 pF

C3606 2113741F25 1000 pF

C3608 2113743K15 0.1 uF

C3609 2113741F49 0.01 uF

C3610 2113741F17 470 pF

C3612 2113741F49 0.01 uF

C3613 2113741F17 470 pF

C3614 2113741F49 0.01 uF

C3616 2113741F49 0.01 uF

C3619 2380090M24 10 uF

C3620 2113741F17 470 pF

C3621 2113741F17 470 pF

C3623 2113741F17 470 pF

C3624 2113741F17 470 pF

C3625 2113741F17 470 pF

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

POWER AMPLIFIER PARTS LIST

R3501

L3501 C3530 C3606

R3615

R3527

E3501

VIEWED FROM SIDE 1

L3608

C3526

R3522

R3530

R3533

R3532

L3522

R3531

C3626

C3625

J2

C3527 L3548

L3547

C3545

C3548

C3547

C3566 C3565

C3568 L3566 C3570

C3572

C3675

L3641

L3661

CR3671

CR3642

CR3641

C3665 C3662

L3562

C3569

C3571

R3671

L3643

R3672

R3675

R3674 C3661

C3660 C3663

C3669

L3663

J1

L3664

C3664

C3667

C3666

MAEPF-26502-O

L3672

C3674

C3673

C3672

R3673

L3662

C3573

C3567

CR3601

R3502

C3501

C3502

Q3521

C3521

R3521

L3523

C3524

L3521

C3504

C3522

C3523

C3620

C3621

R3610

L3545

C3554

L3540

C3543

C3553

C3541

C3542

R3548

C3552 C3623

C3624

C3563 L3560

C3562

C3561

R3543

R3542

R3503

R3504

LIGHT COMPONENTS SIDE

HEAVY COMPONENTS SIDE

R3641

R3642

C3641

C3642

L3642

R3643 R3644

C3564

Q3561

E3503

R3586

C3528

C3604

R3603

R3604

C3603

C3610

R3602 R3608

R3601

L3605

C3612

L3603

L3607

R3525

R3526

C3583

R3583

CR3581

MAEPF-26503-O

C3529

E3504

R3544

R3545

R3585

R3541

Q3541 C3619

VR3602

C3605

Q3601

R3605

R3606

R3582

C3609

C3616

C3602

C3608

C3614

C3613

R3607

C3505

Q3501

R3676

R3677

CR3673

C3676

Power Amplifier (Kit HUE4012D)

Component Locations and Parts List

POWER AMPLIFIER COMPONENT LOCATIONS

INDUCTORS:

L3501 2460591N36 43.67 nH

L3521 2460591C23 13.85 nH

L3522 2462587T17 150 nH

L3523 2460591B80 19.61 nH

L3540 2460591B80 19.61 nH

L3545 2460591C23 13.85 nH

L3547 2460591B80 19.61 nH

L3548 2460591B80 19.61 nH

L3560 2484657R01 Ferrite Bead

L3562 2460591M77 38.13 nH

L3566 2460591M77 38.13 nH

L3603 2484657R01 Ferrite Bead

L3605 2484657R01 Ferrite Bead

L3607 2484657R01 Ferrite Bead

L3608 2484657R01 Ferrite Bead

L3641 2462587T30 1000 nH

L3642 2484657R01 Ferrite Bead

L3643 2462587T30 1000 nH

L3661 2460591W04 55nH

L3662 2460591W04 55nH

L3663 2460591W04 55nH

L3664 2462587T30 1000 nH

L3672 2462587T18 180 nH

TRANSISTORS:

Q3501 4813824A17 PNP

Q3521 4813827A26 NPN

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

Q3541 4813827A36 N-Channel FET (Note 3)

Q3561 4805538W01 N-Channel FET (Note 3)

Q3601 4813824A10 NPN

RESISTORS:

R3501 0662057A01 10

R3502 0662057A25 100

R3503 0662057A01 10

R3504 0662057A56 2K

R3521 0662057A25 100

R3522 0662057A49 1K

R3525 0660081A73 10K

R3526 0660081A73 10K

R3527 0683962T51 120

R3530 0662057A18 51

R3531 0662057A18 51

R3532 0605057A18 51

R3533 0662057A18 51

R3542 0683962T51 120

R3543 0680194M18 51

R3545 0660081A73 10K

R3548 0662057A49 1K

R3582 0662057A81 22K

R3583 0660081A73 10K

R3585 0662057A89 47K

R3586 0660081A73 10K

R3601 0662057C01 0

R3603 0662057A49 1K

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

R3604 0662057A56 2K

R3605 0662057A49 1K

R3606 0662057A37 330

R3607 0662057A25 100

R3608 0662057A25 100

R3610 0680149M02 100K Thermistor

R3615 1705603W01 30 m Shunt

R3641 0662057A01 10

R3642 0662057A01 10

R3643 0680194M18 51

R3644 0680194M18 51

R3671 0662057A84 30K

R3672 0662057A53 1.5K

R3673 0683962T51 120

R3674 0662057A49 1K

R3675 0662057A43 560

R3676 0662057A57 2.2K

R3677 0662057A25 100

PRINTED CIRCUIT

BOARD (For Reference

Only):

8402573Y06

and

8402573Y09

For Kit HUD4012D

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

C3626 2113741F49 0.01 uF

C3641 2113741F25 1000 pF

C3642 2113741F25 1000 pF

C3661 2111078B18 15 pF

C3662 2111078B32 39 pF

C3663 2111078B32 39 pF

C3664 2111078B18 15 pF

C3666 2111078B59 470 pF

C3667 2111078B59 470 pF

C3672 2113741F25 1000 pF

C3673 2113740F35 22 pF

C3674 2113741F25 1000 pF

C3675 2113740F29 12 pF

C3676 2113741F25 1000 pF

DIODES:

CR3601 4880222R01 Reverse Polarity

CR3641 4802482J02 PIN

CR3642 4802482J02 PIN

CR3671 4880236E05 Hot Carrier

CR3673 4880236E05 Hot Carrier

SHIELD:

E3501 2602604Y01 Heat Spreader, RF

Power Amplifier

CONNECTORS:

J1 0905901V06

Antenna

J2 0905902V04

DC Power

REFERENCE

SYMBOL MOTOROLA

PART NUMBER DESCRIPTION

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.

3. When replacing transistors Q3541 or Q3561, perform Q3541 or

Q3561 bias measurement and adjustment procedure on page

28.

This document was created with FrameMaker 4.0.3

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

27

DEPC-97139-O/None

Power Amplifier (Kit HUD4012D) Schematic Diagram

This document was created with FrameMaker 4.0.3

28

Q3541 Bias Measurement and Adjustment Procedure:

1. Disconnect A+ supply from radio.

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

3. On PCB, tack solder wires onto pads for L3607 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.

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.

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

7. Remove trim resistors R3525 and R3526 from PCB.

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

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.

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

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.

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.

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

15. Reinstall R3503 and L3607 on PCB.

Q3561 Bias Measurement and Adjustment Procedure:

1. Disconnect A+ supply from radio.

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

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.

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.

7. Remove trim resistor R3545 from PCB.

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.

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.

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 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.

15. Reinstall R3503 and L3560 on PCB.

Note

In step 12 and/or 13, if the required current level of 120- to 180-milliamperes can-

not 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.

29

1

Table 1:

Schematic Diagram Interconnection List

From/To From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

IF1-2-12 AUDIO_MOD Main Controller Block

Diagram

68P81083C20 IF1-2-12 AUDIO_MOD Receiver IF 68P81080C48

IF1-2-13 ROSC_SEL Main Controller Block

Diagram

68P81083C20 IF1-2-13 ROSC_SEL Receiver IF 68P81080C48

IF1-2-14 GND Main Controller Block

Diagram

68P81083C20 IF1-2-14 GND Receiver IF 68P81080C48

IF1-2-15 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

30

IF1-3-4 SDATA Main Controller Block

Diagram

68P81083C20 IF1-3-4 SPI TX DATA Receiver IF 68P81080C48

IF1-3-5 SCLK Main Controller Block

Diagram

68P81083C20 IF1-3-5 CLK Receiver IF 68P81080C48

IF1-3-6 RX_CNTL_I_SRC Main Controller Block

Diagram

68P81083C20 IF1-3-6 Not Indicated Receiver Front End 68P81080C48

IF1-3-7 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 From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

31

IF2-2-12 GND Synthesizer 68P81080C48

IF2-3-1 PA Temp Synthesizer 68P81080C48 IF2-3-1 PA_TEMP Main Controller Block

Diagram

68P81083C20

IF2-3-2 PA_CONTRL Synthesizer 68P81080C48 IF2-3-2 PA_CNTL Main Controller Block

Diagram

68P81083C20

IF2-3-3 Current_Sense- Synthesizer 68P81080C48 IF2-3-3 CURRENT_SENSE_- Main Controller Block

Diagram

68P81083C20

IF2-3-4 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

Table 1:

Schematic Diagram Interconnection List

From/To From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

32

IF3-4-8 Not Indicated Receiver Front End 68P81080C48 IF3-4-8 RF_REG_5V Receiver Back End 68P81080C48

IF4-1-6 Mod In Synthesizer 68P81080C48 IF4-1-6 AUDIO MOD Receiver IF 68P81080C48

IF4-2-7 2.1 MHz Synthesizer 68P81080C48 IF4-2-7 2.1MHz Receiver IF 68P81080C48

IF4-3-1 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 1F1-2-16

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

Table 1:

Schematic Diagram Interconnection List

From/To From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

33

IF7-1-31 TEMP_GND Main Controller Block

Diagram

68P81083C20

IF7-2-3 V_CNTL IF7-2-3 V_CNTL Controller Power

Control

68P81083C20

IF7-2-4 V_FORWARD Main Controller Block

Diagram

68P81083C20 IF7-2-4 V_FORWARD Controller Power

Control

68P81083C20

IF7-2-7 UNSW_5V Main Controller Block

Diagram

68P81083C20 IF7-2-7 UNSW_5V Controller Power

Control

68P81083C20

IF7-2-8 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

Table 1:

Schematic Diagram Interconnection List

From/To From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

34

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 1F7-2-10

1F7-4-14 CURRENT_SENSE Main Controller Block

Diagram

68P81083C20 1F2-3-3

1F7-4-16 A+

Table 1:

Schematic Diagram Interconnection List

From/To From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

35

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 Not Indicated 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

Table 1:

Schematic Diagram Interconnection List

From/To From/To

Node Signal Name Schematic Diagram

Title Publication Node Signal Name Schematic Diagram

Title Publication

36

NOTES

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MCS 2000™ Mobile Radio

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1

REPLACEMENT PARTS ORDERING

ORDERING INFORMATION

MAIL ORDERS

Send written orders to the following addresses:

TELEPHONE ORDERS

United States and Canada Accessories and Aftermarket Division: Servicers Training (VHS Video Tapes):

Call: 1-800-422-4210 Call: 847-576-2828

1-800-826-1913 (For Federal Government Orders)

1-847-538-8023 (International Orders)

FAX ORDERS

United States and Canada Accessories and Aftermarket Division: Federal Government Orders:

FAX: 847-538-8198 (Domestic) FAX: 410-712-4991

847-576-3023 (International) International: 410-712-6200

Parts ID: 847-538-8194

PARTS CUSTOMER SERVICE PRODUCT CUSTOMER SERVICE

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.

Replacement Parts/

Test Equipment/Manuals/

Crystal Service Items:

Motorola Inc.

United States and Canada

Accessories and Aftermarket

Division

Attention: Order Processing

1313 E. Algonquin Road

Schaumburg, IL 60196

Federal Government Orders:

Motorola Inc.

United States and Canada

Accessories and Aftermarket

Division

Attention: Order Processing

7230 Parkway Drive

Landover, MD 21076

International Orders:

Motorola Inc.

United States and Canada

Accessories and Aftermarket

Division

Attention: International Order

Processing

1313 E. Algonquin Road

Schaumburg, IL 60196

United States and Canada Accessories and

Aftermarket Division:

Call: 1-800-422-4210

Parts Identification:

Call: 847-538-0021

Customer Response Center

(Sales and Service Assistance):

Call: 1-800-247-2346

FAX: 1-800-232-9272

TEPF-9679-T

MCS 2000 Mobile Radio Service Instructions

Publication Number 68P81080C48-O

6881080C48-O

VHF Frequency Range, 25W Specific