Oct 30, 1977 · (SERVICE MANUAL) Set using ISO screws DATE OF ISSUE 30/10/1977 SPECIFICATIONS GENERAL Semiconductors: 1 IC, 1 FET, 47 transistors, 25 diodes & 1 LED AX-7400EE: 120V ...
(SERVICE MANUAL)
Set using ISO screws
DATE OF ISSUE 30/10/1977
SPECIFICATIONS
GENERAL
Semiconductors: Power source:
Power consumption: Dimensions: Weight:
1 IC, 1 FET, 47 transistors, 25 diodes&
1 LED
AX-7400EE: 120V/220V
(Switchable) 50/60 Hz
AX-7400UK: AC120V/240V
(Switchable) 50/60 Hz 205W (MAX) 420(W) x 150(H) x 360(D} mm 9.0 kg
Image frequency interference ratio:
40 > 35 dB (1400 kHz)
Intermediate frequency interference ratio: 32 > 25 (input 74 dB, 1000 kHz)
IF selectivity: Tuning hum:
+25/--25 +6 dB (1000 kHz) 44 > 36 dB {input 74 dB, 1000 kHz)
AGC characteristic: | 50 +5 dB (1000 kHz)
PRE AMP SECTION
<PHONO AMP SECTION>
FM TUNER SECTION
Frequency ranges:
87 ~109 MHz
Intermediate frequency:
10.7 MHz +0.1 MHz
Frequency scale accuracy:
+150 kHz (88 MHz}
+200 kHz (98 MHz)
+150 kHz (108 MHz)
Noise limit sensitivity: AX-7400EE: (SN26 dB, div 40 kHz)
3+2 dB (88, 98, 108 MHz)
AX-7400UK: (SN30 dB, div 75 kHz,
THD 3%)
7 <10dB (88 MHz)
7< 9B (98, 108 MHz)
Image frequency interference ratio: 45 > 40 dB (98 MHz}
Intermediate frequency interference ratio: 75 > 70 dB (98 MHz)
Muting sensitivity: Effective selectivity:
26+4dB
AX-7400EE: {tune out 300 kHz, div 40 kHz)
60 > 55 dB
AX-7400UK: (tune out 400 kHz,
div 75 kHz) 65 > 60 dB
Capture ratio: Separation:
SN ratio:
1.5 +1 dB 40 > 35 dB (1 kHz)
63 > 58 dB {input 60 dB)
AM TUNER SECTION
Frequency ranges:
515~1650 kHz
intermediate frequency: AX-7400EE: 455 kHz +5 kHz
AX-7400UK: 468 kHz +5 kHz
Frequency scale accuracy: +20 kHz (600 kHz} +30 kHz (1000 kHz)
+35 kHz (1400 kHz) Noise limit sensitivity: 46 < 50 dB (600, 1000, 1400 kHz)
(SN20 dB)
Sensitivity/impedance: Gain: Allowable input: Distortion:
RIAA curve deviation:
2.5 mV --52 +2 dB/47 kQ 35.5 +1 dB (1 kHz) 120 > 100 mV (1 kHz 0.5%) 0.4 < 0.5% (input 100 mV>,
+0 +0.8 dB (30 Hz~15 kHz)
1 kHz)
Separation:
35 ah dB (1 kHz)
SN ratio:
65 2 60 dB
<TAPE-1, AUX SECTION>
Sensitivity/impedance: 150 mV --16.5 +2 dB/470 kQ
Gain:
0 +9 dB (1 kHz)
Distortion: Frequency response:
Separation:
0.05< 0.1%
+--0 yp (99 H2~50 kHz)
40 an dB
SN ratio:
70 <65 dB
CONTROL MAIN AMP SECTION
Gain: Tone controls:
37.5 +3 dB (1 kHz) BASS
+8, --7 dB/+6, --5 dB +1.5 dB (100 Hz)
400/200 Hz turnover frequency
TREBLE +8, --10 dB/+5, --6 dB +1.5 dB (10 kHz)
2.5/5 kHz turnover frequency Loudness Response: +7 +1.5 dB {100 Hz) {With volume at -40dB) +4 +1.5 dB (10 kHz) Continuous power output: 32W + 32W > 30W + 30W (420)
1 kHz {both channels driven) (distortion 0.5%)
Harmonic Distortion: 0.5% < 0.8% (1 kHz, 30W + 30W)
0.05%<0.1% (1 kHz, 1W + 1W)
Power bandwidth:
27W + 27W > 25W + 25W
Residual noise:
(40 Hz~10 kHz, distortion 0.5%) 0.6 < 0.8 mV (482)
® Specifications and external appearance are subject to change without notice due to product improvement.
MODEL AX-7400EE,UK
~*~
|
DISASSEMBLY INSTRUCTIONS
To Remove Top Panel
Remove 7 screws.
U+ 4 -- 6 (Black) UTi+ 3 -- 8 (Black) &
Ti+ 3 -- 8 (Biack)
To Remove Front Panel
1) Pull out the 6 knobs, 2) Remove 6 screws. 3) Pull off the 2 connectors.
AIWA
U+ 4 -- 6 (Black)
To Remove Tuner Circuit Board
1) Remove 3 screws. 2) In order to prevent the dial cord from slipping off the
dial drum when removing the tuner circuit board, loosen setscrew and as shown in the figure, set dial drum an raised tab of chassis.
To Remove Switch Circuit Board 1) Remove 5 stoppers. 2) Remove 1 screw and 2 nylon rivet.
go Nylon rivet
- we
To Remove Main Amp./Power Circuit Board
Remove 2 screws.
To Remove Lamp Circuit Board
Press tab in direction shown by arrow to remove circuit board.
AIWA
|
MODEL AX-7400EE,UK
To Remove Muting Circuit Board
Remove 2 screws.
To Remove Control Circuit Board 1) Pull out the lever knobs. 2) Remove 3 screws and 4 nuts. 3) Pull off the 2 connectors.
U+ 3 -- 4----® g-- VS+2.6-- 4
CONTROL Circuit Board
,
i
MUTING Circuit Board
_.... |To Remove Speaker Switch Circuit Board ""\' Remove 2 screws.
ican a
.ne oe
3-6
DIAL CORD STRINGING
Always set tuning capacitor to this position before starting to string dial cord
{377mm
MODEL AX-7400EE,UK EXPLODED VIEW-1
AIWA
AIWA
MODEL AX-7400EE,UK
MECHANICAL PARTS
PARTS LIST
i Ref. No.
1~7 1-1 1-2 1-3 1-4 1-5 1-6 1-7
PartNo. |
09-047-099-01 82-488-001-01 | 82-488-224-01 82-397-245-01 82-488-206-01 82-488-205-01 82-488-204-01 82-397-027-01
Part No.
Changed to
1-8
82-488-01 2-01
1-9
82-488-016-01
1-10
82-488-024-01
1-11
82-488-023-01
1-12
82-488-002-01
1-13
82-380-439-01
1-14
87-085-144-01
1-15
82-488-008-01
1-16
82-488-004-01
1-17
82-488-006-01
secaiptni t
Panel Assembly Front panel Cushion, Tuning ponter holder Himeron cloth, Cabinet Guide, Button selector S cushion "Spacer, Meter Ring, AC switch button
Window, Tuning dial Screw, Window G washer G sleeve Steel cabinet Spacer, Back panel Leg Knob, Tuning Volume knob ass'y Tone knob ass'y
a * mark in this part list shows exclusive part (which is used) for only Model AX-7400.
Common
Model
4
AD-6550
*
AD-6550
wa=A=a|htb)d
AD-6500 psPPahAooLeA
1-102
87-253-170-01 87-257-169-01
U+4-8
U + 4-6 (Black)
87-340-095-01 87-081-531-01
Description
UT, + 3-8(Black) OTT + 3-6
MODEL AX-7400EE,UK
EXPLODED VIEW--2
AIWA
AIWA
MODEL AX-7400EE,UK
Part No. Changed to
2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 2-12 2-13 2-14 2-15 2-16 2-17 2-18 2-19 2-20 2-21 2-22 2-23 2-24 2-25 2-26 2-27 2-28 2-29 2-30 2-31 2-32 2-33
82-488-203-01 82-488-647-01 82-474-241-01 82-488-01 7-01 82-488-027-01 82-488-028-01 82-488-021-01 82-488-015-01 82-488-013-01 82-488-014-01 82-490-214-01 82-488-202-01 82-488-225-01 82-488-022-01 82-488-019-01 82-488-020-01 82-488-626-01 87-087-029-01 82-397-033-01 82-470-276-01 87-081-483-01 82-488-214-01 82-488-228-01 82-488-227-01 87-081 -548-01 82-488-211-01 82-488-210-01 82-473-259-01 82-488-011-01 82-488-213-01 82-385-383-01 87-038-039-01 82-488-207-01
[rav| oneer
2-102 2-103 2-104
82-263-092-01 87-253-092-01 87-253-035-01 87-253-072-01
V+3-4
Description
Hoider, Lamp Lamp Clamp, Dial panei Tuning pointer Holder, Tuning pointer Tube, Tuning pointer Sheet, Tuning dial Frame, Tuning dial Dial plate Dial back plate Holder, Dial plate Front chassis Cushion B, Holder, Knob Decorative palte, Switch Lever, Knob Lamp Rubber cushion AC switch button ass`y Roller, 14@ Motor screw, M2.6 Roller holder A Supporter, Switch Cover, Insulation PW6.1-8-0.3 Tuning shaft bearing Tuning shaft Flywheel, Tuning Push button, FUNCTION Shaft, FUNCTION Stopper, Rod Wire binder Button guide, FUNCTION
Common
,
Model
my
2
2
:
2
AF-5050
2
$
1
*
1
=
1
bs
1
>
1
2
1
`
1
1
"
1
=
2
*
2
"
2
sg
2
.
1
1
AD-6550
1
AF-3030
3
3
:
1
.
1
.
1
2
>
1
.
1
AX-7500
1
*
5
ig
5
AD-6300
1
1
-
1
Tne [eon
2-106 2-107 2-108
87-081-511-01 87-480-093-01 87-364-093-01 87-081-253-01
VTT + 3-6 VS +3-5 SSH3-5 N-9
MODEL AX-7400EE,UK
EXPLODED VIEW---3
AIWA
AIWA
MODEL AX-7400EE,UK
Part No.
3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14
3-15 3-16 3-17 3-18 3-19 3-20 3-21 3-22 3-23 3-24 3-25 3-26 (a) 3-26 (b) 3-27 3-28 (a) 3-28(b) 3-29 3-30 3-31 3-32 3-33 3-34 3-35 3-36 3-37 3-38 3-39 3-40 3-41
3-42 3-43 3-44
82-488-201-01 82-488-216-01 82-488-21 5-01 82-470-276-01 87-081-483-01 82-488-218-01 87-064-080-01 82-488-208-01 82-488-219-01 82-488-010-01 82-488-212-01 87-087-029-01 87-085-102-01 87-038-039-01
82-488-220-01 82-445-656-01 82-445-655-01 87-033-008-01 82-303-333-01 82-488-646-01 82-488-645-01 82-473-013-01 82-473-010-01 82-473-051-01 82-488-226-01 82-488-030-01 82-488-018-01 87-064-038-01 87-034-835-01 87-034-872-01 82-385-383-01 87-056-008-01 87-085-094-01 87-085-095-01 $2-397-244-01 82-473-252-01 87-096-082-01 82-461-378-01 82-488-223-01 82-473-019-01 82-830-102-01 82-488-627-01 82-473-018-01 82-471-212-01
87-085-101-01 82-471-244-01
[rect [ein
3-102 3-103 3-104
3-105 3-106
3-107 3-108 3-109
82-263-092-01 | V + 3-4 87-253-092-01 | U+3-4 87-253-099-01 | U+3-15 87-257-092-01 | U+ 3-4
(Biack) 87-253-094-01 | U+3-6 87-257-097-01 | U+3-12
(Black) 87-081-511-01 | VTT +3-2 87-500-169-01 | VF + 4-6 87-500-093-01 | VF.+ 3-5
a
Amp. chassis Holder A, Circuit board Holder B, Roller Roller, 14@ Motor screw, M2.6 Holder C, Circuit board Wire binder Holder, Rotary switch Hoider D, Circuit board Push button, Selector Shaft, Selector Rubber cushion Nylon rivet bushing Wire binder Holder, Power amp. FM external antenna terminal AM external antenna terminal Terminal, Earth Spring bearing (FR-A) Antenna terminal! Bar antenna Holder C, Antenna Antenna holder ass'y Caution label, Antenna Spacer, Jack plate Jack plate (UK modei only) Jack plate (EE model only) Wire clip A AC cord (EE model only) AC cord (UK model only) Stopper, Rod Label, AC cord Holder A, AC cord Hoider B, AC cord Holder, AC cord Spring, Tuning dial String, Tuning dial
Leaf nut Drum, Tuning dial Lock plate, Pointer UL tube, 1.6¢ -- 2mm Lamp Holder, Pointer Guide, Dial wire Cord bushing Heatsink
Common
:
*
1
*
1
*
1
AF-3030
1
2
>
3
4
*
1
*
2
ss
5
%
5
1
10
1
if
2
TPR-250
1
TPR-250
1
1
1
.
1
'
1
AX-7500
1
AX-7500
1
AX-7500
1
sd
1
*
1
=
1
1
1
1
AD-6300
5
1
1
1
AD-6550
1
AX-7500
1
TPR-930
1
.
1
AX-7500
1
1
*
1
AX-7500
1
AF-5080
1
1
AF-5080
1
Description
87-480-033-01 | VS + 2.6-4
1
3-111 87-480-093-11 |VS + 3-5
1
3-112 | 87-410-316-01 | W3-8-0.8
1
3-113 | 87-410-324-01 | W4-10-0.4
1
3-114 | 87-081-053-01 | FW4.2-10-0.8
1
4-115 | 87-421-306-01 | WS-3
1
3-116 | 87-450-416-01 | LB-6
1
3-117 | 87-391-017-01 | N-3
1
3-118 | 87-391-024-01 | N-4
1
3-119 | 87-253-095-01 | U+3-8
1
.
MODEL AX-7400EE,UK
AIWA
ACCESSORIES/PACKAGE
No Ref.
a
Part No s
ChPaarntgeNdo. to
O WO =HOYA nN o=t©WON
82-473-861-01 82-488-851-01 82-488-852-01 82-488-853-01 87-051-131-01 87-051-146-01 87-056-500-01 82-488-901-01 82-488-902-01 87-051-171-01 87-056-008-01 87-056-009-01 87-056-016-01
Descriepetion
Cushion, Bar antenna Printed indiv., Packing Cushion L, Printed indiv. Cushion R, Printed indiv. Poly-vinyl sack Poly-vinyl sack {for case) Curl stopper Instructions booklet (EE model only) Instructions booklet (UK model! only) Poly-vinyl sack (for instruction) Label, AC cord (UK model only) Disributors fist Tag, Main voltage {UK model only)
CoMmomdeoln i
AX-7500
1
*
1
*
1
*
1
1 1 2 1 1 1 1
1 1
HARDWARE NOMENCLATURE
V:
Pan head screw
U:
Binding head screw
UT1:
Binding head tapping screw
VTT: Pan head tap-tight screw
QTT: Flat countersunk tap-tight screw
VF: Flange and Pan head
SCTCW
VS: Pan head screw with spring washer
© (pam © (ha ©) (ao ©)(hata@) © Pram©)
(ja
(jen
SSH: W:
Hexagon Socket SET screw Washer
. © -
FW: Fiber washer
SW: Spring washer
N:
Nut
LB: Lug terminal plate
Example:
8 EE |
V+3----6
Length in mm
Diameter in mm
Type of Slot Type of Head
7. Length in mm Diameter in mm Type of Slot Type of Head
o"
SCHEMATIC DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
WANT. C.B Tso!
.
300
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-
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Q50!1 3SK59 (GR)
FM RF AMP
:
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Q508,509 2SC3BI(0)x2
Q502 2SC535(B) FM CONV
Q503 2SC381(0) FMIF AMP
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IF
AMP Cs2g 24 PK
ISIBBFMx2
IF AMP
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AMIF AMP
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8
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C556 0.47/50
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FM TUNING
SleB oe SELECTOR SW (FM) St---- TAPE! /MONITOR
$2:--- TAPE2/PLAYAU,X: S3---- PHONO
S4---- AM S5---- FM S6------HI FILTER (OFF) S7 -----+- LOUDNESS (OFF)
SB STEREO/MONO (STEREO) SQ FM MUTING (OFF)
SI0-*-- AFC (OFF)
Stl -----400H2/
DEFEAT/200Hz (400Hz)
Sl2--+-- 2.5KHz/DEFEAT /5KHz (25KHz)
SI3----S-P.SELECTOR (B) Si4----- POWER (ON)
S15----- VOLTAGE SELECTOR (HIGH)
-_
Pi METER C.B
LMI ae SIGNAL
MAIN AMP7POWER CB
Q705 2SC945L(P)
beg BIAS
Q707 2SCI735(D)
rteee POWER
Q711 2SD371(D)
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EXMUTING CB
Qes52 2SCI364 (7).
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SWITCH C.B
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0.1 (250V)
"ce" MODEL i20V/220V 50/60Hz
"uK" MODEL 120 /240V 50 /60Hz
5
6
7
8
9
10
11
12
13
14
15
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Q503 2SC381(0) FMIF AMP
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FM TUNING
SieBoo -e SELECTOR SW (FM)
SI--.- TAPE! /MONITOR
S2---S3----
TAPE2/PLAY, PHONO
AUX:
S4---. AM
S6--S5---.-.-.-HIFM FILTER (OFF)
S7 e+e, LOUDNESS ( OFF)
SB S TEREO/MONO (STEREO)
S9-:---FM MUTING (OFF)
SIO:---- AFC (OFF)
S11 -----400H2/
DEFEAT/200Hz (400Hz)
SSSIi1423--------------2PS-.OP5W.KSEEHRLzE/CD(TEOOFNR)EAT(B)/5KHz (25KHz)
SI5----- VOLTAGE SELECTOR (HIGH)
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(METER C.B :
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[LOUDNESS]
N
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Q301 2SC732(BL)
PRE AMP
Q303 2SC945(LP)
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SIGNAL EARTH TERMINAL
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Q701 2SA84I(BL) Q703 2SCI735(D) Q713 2SB531(0)
SIGNAL AMP
DRIVE
POWER
Q709 2SA850 (D)
a Bg cs a Sr OW aS net
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-
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ye ai ce i ce
=
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(DIAL LAMP) 4
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--
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1 Feo
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ee
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ase prtesoy)
; `"EE" MODEL
- 120V/220V 50/60Hz
UlK20/M2O40DVE_L -
ols 6°20
i
i
3SK59
: ,
: :
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2255C1563257
me
7
; : 22S5C383!80
28C732
-
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25C1364
2SC1383
f
RY
eee
®y
2SC710
25C1735
|
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2SA850
:
2SA84I
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F 4). `
E
250234
sa
H
kK) c
E
25853!
|
--
CiMn
`
c
E
2SD371
|
`
|
ik
+
05Z-10
iSi88
IS2{39B
30D2
HZ-33
IS1885
NOTES:
1) ---- B(+) power supply
2) TM» Signal path
= AM signal path
3) The voltage is the reference value measured with a tester
_ (20 k-ohms/V DC) when there are no signals.
But (
) is with AM reception.
4) Resistors with no designation have a rated power of
"%W and a tolerance of +5%.
5) Capacitors with no designation have a dielectric strength
of less than 50WV.
6) Ceramic capacitor symbols:
7) |
8)
ea - For temperature compensation (SH)
o~{}- For temperature compensation (SL)
Ale High dielectric constant system (YY) +} Hi:gh di.electric` constant system (YP, YZ)
The only capacitor tolerances +5% (J) and 10% (K).
indi| cated
are
+2%
(G),
Explanation of symbols
: TM
Mylar capaci:tor
6) Styrol capacitor
oO)
Tantalum capacit. or
(CL) Low-leakage capaciti or
iS Polypropylene fiq lm capacitwsor
;
Low-n7 ois; e resi; stor
This schematice diagram is subject to chhange aweithout notice in the interests of improved performance.
|
<<
ADJUSTMENTS
@ Instruments Required
Signal Source
1. RF Signal generator (AM, FM). 2. IF sweep generator (Centered 455/468 kHz for AM
and 10.7 MHz for FM).
Output Indicator
.
1. V.T.V.M.
2. Oscilloscope
e Regulator Adjusting Steps
For band
For stages on each band IF
RF frequency range RF tracking
IF RF frequency range RF tracking
AM-IF Alignment
AM IF sweep gen. TP3 (AM IF input)
Set signal to
Sweep centered 455 kHz (EE) 468 kHz (UK)
Alignment indicator --
Connect to
Oscilloscope
AM det. output tab
Set radio dial to Min. Freq
CFT601 IF T601
AM-RF Alignment
2
3
FB
FM-IF Alignment
:
Signal source
Set signal to
Alignment indicator
Connect to
Set radio dial to
AM signal gen
Loop antenna
515 kHz (Modulated)
AM cet. output tab
Loop antenna
1650 kHz
(Modulated)
AM aet.
output tab
(Repeat steps 1 and 2 to obtain frequency range.)
L pa apaenhs
600 kHz
(Modulated)
AM det.
515 kHz (Low end) 1650 kHz
(High end)
sesedat
(Modulated)
output tab
panes
(Repeat steps 4 and 5 to minimize tracking error, and also step 3 if necessary.)
L602 (OSC coil)
TC-5
(OSC trim.)
L601
(ANT coil) (ANT trim.)
Signal source Connect to FM |F sweep gen.
TP] (FM IF input)
Set signal to
Sweep centered 10.7 MHz
indicator
Oscilloscope FM det.
Output tab
Set radio dial to
Max. Ere . ea
- |FT501 1FT502
TP1(FM IF npayinput Swe1e0p.7 cMenHtzered
ouFtMputdett.ab
Max. Freq.
IF T503
(Repeat 1 and 2 to obtain a balanced "'S" curve linearity.)
FM-RF Alignment
Signal source
Set signal to
indicator
Set radio dial to
FM signal gen. .
;
87 MHz
109 MHz
V.T.V.M. FM cet.
FM cet.
L505 TC-3
a
ae
(Repeat steps 1 and 2 to obtain frequency range.)
Antenna termin: al
(Mo8d8ulMaHtzed)
ouFtMputcett.ab
88 MHz
Antenna termin: al
(M1o0d8ulMatHezd)
ouFtMputdett.ab
108 MHz
(Repeat steps 4 and 5 to minimize tracking error, and step 3 if necessary.)
LL550013 ((RAFNTcoiclo)il) TTCC--12 ((ARENTtritrmi)m)
Adjust for
Maximum
Maximum :
Maximum
;
ren aum lial
Adjust for Max
Symmetrical response
equal height Symmetrical
response,
centered
10.7 MHz
Maximum Maximum Maxi; mum Maxi. mum
MPX Adjustment
@ 19 kHz
Conditions: Selector switch: FM ST/MONO switch: STEREO Dial position: detuned from station Adjust SFR501 for 19 kHz + 30 Hz test point (TP-5).
frequency
at 19 kHz
@ MPX
Conditions: Carrier frequency: 98 MHz Input Signal: 60 dB Modulation: Pilot signal 10%
Composite signal 90% Modulation frequency: 1 kHz Tune dial to 98 MHz and adjust SF R502 ration (40 dB).
for optimum
sepa-
How to change the upper limit of FM frequency range from 109 MHz to 104 MHz. (EE model only)
Ceramic Capacitor
18 pF
88-251-180-01
* Attach a 10 pF ceramic capacitor to the rear of the C514 on the tuner circuit board.
LEVEL DIAGRAM
88-251-180-01 88-251-100-01
TUNER
TUNER
HIGH FILTER
PHONO
RIAA EQ (36 dB)
esagTMAOPENITOR
TONE AMP
LOUDNESS | VOLUME (30dB) [~
(-12dB/oct)
PROTECTOR S
g
=$c]
|
TAPE-2/PLAY
(AUX) bin AMP
OS.I. SmEidLsECTORC7Y?
C7?e
mOOe
BALANCE LOUDNESS CONTROL
TONE CONTROL
POWER AMP
POWER AMP
TAPE-|
bee -16.5dB
MONITOR , REC OUT ='6:2e8
TONE TONE AMP CONTROL
fees owed] 20dB 4 25\
a
MONITOR
DIN AMP
(.0 dB)
FTAMP,EATMM| TUNER
AUX(TAPE -2)
O
Peel
ree
~16.54B
OLUME
Vi
J
-22.5dB
es
-12.5 dB
PHONO
O - 52.5dB
ulator Adjusting Steps
For stages on each band
IF
.
RRFF tfrraecqkuienngcy range
IF
RF frequency range RF tracking
:
! Set radio dial to
Adjust for
| Min. Freq
CFT601 IFT601
Maximum
| Set radio dial to
515 kHz (Low end)
1650 kHz
(High end)
ato
(OSC coil)
TCS
(OSC trim.)
sss
VOOR
step 3 if necessary.)
(ANLT601coil)
nea2
oe,
Miexinndin
Set radio dial to
Adjust
Max. F
SAR nes
Max.ax. F Freq.
_ |FT501
IFT502
I| FT503 ;
Adjust for
Max
Symmetrical
response equal height Symmetrical
rceesnptoenrseed, 10.7 MHz
Set radio dial to
Adjust
87 MHz 109 MHz
(OSLC50c5oil)
(OSTCC-t3rim)
|
7
Maximum Maxi; mum
88 MHz
108 MHz 3 `if necessary.)
LL550013 ((RAENTcoiclo)il) TTCC--12 ((ARFNTtritmri)m)
Maxi. mum Maxi3 mum
MPX Adjustment
® 19 kHz
at Conditions: Selector switch: FM
ST/MONO switch: STEREO
Dial position: detuned from station Adjust SFR501 for 19 kHz + 30Hz test point (TP-5),
frequency
at 19 kHz |
@ MPXx
Conditions:
Carrier frequency: 98 MHz Input Signal: 60 dB
Modulation: Pilot signal 10%
Composite signal 90% Modulation frequency: 1 kHz Tune dial to 98 MHz and adjust SFR502 ration (40 dB).
for optimum
sepa-
How to change the upper limit of FM frequency range from 109 MHz to 104 MHz. (EE model Only)
Symbol No.
Description
109 MHz
Ceramic Capacitor
18 pF
88-251-180-01
* Attach a 10 pF ceramic Capacitor to the rear of the C514 on the tuner circuit board.
LEVEL DIAGRAM
88-251-180-01 88-251-100-01
FTMUNER
TAUMNER
RIAA EQ
ORS PHONO
(36 dB)
TAPE
- sap ONTOR
<7
io,
7
mei?
TONE AMP
VOLUME (30 4B)
HIGH FILTER
(-12dB/oct)
PROTECTOR
~ 52.548
TAPE-2/PLAY
(AUX) on AMP
MODE
BALANCE LOUDNESS
L
CONTROL
:
TONE CONTROL
POWER AMP
POWER AMP
© sp-a SP SELECTOR
©) sP-s
apes) MONITOR
=e 5 a5 REC OUT. -16.548
TONE aia
TONE sari
[| ~
2068 49 25w
5 2048
eid
D= IN (0
AdBM)P
MONITOR
TFMA,PAEM-. | TUNER
PHONO EQ AMP
iesaa ercee)
©
ey
a,
---16.5dB
ie MARGIN
--_
-22.54B
|
i1e0 68
-20 dB
PHONO
L
O
~52.5dB
~30 dB |
----4-40 dB
-50 dB
WIRING-1
L501, TCi
L503, TC2
PN TUNER CB {\ PTP=1 |FM IF INPUT
L505, TC3
G` eognyNhe(&LeasbQ5o04-::A @
[TP-2|FM DET OUT
|
|TP-3 |IAMNIPF UT |
Leo! (MW BAR ANTENNA COIL) |
ee
ee
ame¢
3 x O&oITP-4 |A7M DET OUT
=e [Ee
f §
a
eEoQoeu5ssahu Toow
lnnaaany
(HUETLT
E
F
C
[L]METER C.B [M]JMETER C.B P§mMeterc.B QYJ METER C.B
[E] SWITCH C.B
TON (UN BAL)
a
XC LM
MPANTENNA C.B
NOTES (1)
B( +) Pattern
Others pattern
VR7,8_
[VOLUMMEE]
(2) The voltage is the reference value
-2{FM DET OUT
10
11
12
13
14
15
16
17
18
[S¥SwiTCcH CB
SIGNAL EARTH TERMINAL
TP-5|I9KHz TEST POINT
J3,4 PHONO
J6
TAPE2 /AUX
(REC /PLAY)
L_ SOURCE
J5
TAPE!
(REC /PLAY) lL SOURCE-TAPE2
AYD
Q38 TBA
Q3u
9YO Wd
98765432
ae
D514
----
FM STEREO
tuIN
wet
~ <{ oO
N pas
OW <q>
TAPE!/MONITOR
[EYCONTROL C B
[E] SWITCH C.B
CONTROL C.B_ [E|SWITCH C.B
VR5,6
BALANCE
VR3 4 '
TREBLE
DEFEAT--* SPSS pe -
2.5KHz Si2 DEFEAT
5KHz
S 4D0EF0EHAzT
200Hz
is the reference value measured with a tester (20K ohms/VDC) when there are no signals.
VRI,2
BASS
WIRING--2 I
f-] TRANSISTOR C.B
GJ TRANSISTOR C.B
15 14 13 l2
lO9 8 7
Main amp idring current adjustment
Method: Rating:
Adjust semi-fixed resistor SFR701 (702) so that the voltage between Q 711 (712) and Q 713 (714) emitters is set to 23.5 mV. Idling current: 25 mA Emitter resistance 0.472 x 2=0.940
0.942 x 25 mA = 23.5 mV
SPEAKER 4~160
[ISP TERMINAL C.B
22
A
a et)
eeoe ce
Sa
BLU
a
GRN
BLK
B]CONTROL CB C18 |] [> i kreo
}--_----
WHT
Peete
BLK
Sis
GSP SWITCH C.B
NOTES (1)
WHT
|
<a8LK c
RED
3
BLU
G C> oeMAIN AMP/POWER C.B
315
VOLTAGE SELECTOR
Jil
rLOO4
(TUING POINTER)
YEL
B(+) Pattern
gi Others pattern
PL803 (LEVEL METER)
F]LAMP C.B
WHT
[ql AMP
(2) The voltage is the reference value measured with a tester (20K o
[--] MUTING C.B
SER Bex NESS
ya | uJ >
BLK> RED YEL>
+«, e
--
C0*, ':ras0O:'R'0:0:0:%
: @
POWER CB
HAA
A
Py Sox
ul
CHASSIS
=
EARTH
YEL
Rie es F 803 SB00MAT.
3
ch
RED
0U!CC("`" `"("`i ORG
Tsoi (PT) ee ey ne |
(SCC
oe ee | WHT
T.F |
|
|
wm HT
RED
|
| |
RED r SS
C802
"UK*BRN
S14 WER OFF/ON
[IB] MAIN AMP/ POWER C.B
[LAMP CB
tester (20K ohms/VDC) when there are no signals.
" EE" MODEL
AC 120v/220V 50/60Hz
rs
"UK" MODEL
a ACI20/240V 50/60 Hz
AIWA
ee
MODEL AX-7400EE,UK
ELECTRICAL MAIN PARTS LIST
Description
< TUNER CIRCUIT BOARD SECTION >
PCB-A
82-488-649-01 Tuner circuit board
IC501
87-027-148-11 IC, KB4400
Q501
87-026-1 29-01 FET, 3SK59 (GR)
Q502
89-305-352-01 Transistor, 2SC535 (B)
Q503,506,507, 89-303-813-01 Transistor, 2SC381 (O)
508,509
Q504
89-307-103-01 Transistor, 25C710 (C)
505,511,512 89-309-456-01 Transistor, 2SC945L (P)
510
87-026-045-01 Transistor, 2SC380A (O)
Q601,604
89-303-804-01 Transistor, 2SC380 (Y)
Q602,603
89-303-803-01 Transistor, 2SC380 (O}
0671
89-313-834-01 Transistor, 25C1383 (S)
D501,502,503, 87-027-097-01 Diode, 181555
504,510,511
512,513,602
D505 D506,507,508
509,601,603
87-026-049-01 88-052-188-11
Diode, 182139 (B) Diode, 18188 (FM)
D671 L501 L502,504,506 L503
87-027-239-01 82-473-729-01 82-470-604-01 82-473-730-01
Zener diode, 052-10U FM antenna coil FM choke coil, 2.2uH FM RF coil
L505 © L602 1FT501 |FT502 \FT503 IF T601 VC1~5 TC1~5 CF501,502,
503,504
82-471-71 7-01 87-007-066-01 84-173-614-01 82-488-651-01 87-008-159-01 87-008-160-01
FM OSC coil MW OSC coll FM IFT FM IFT FM coil (Ratio) AM IFT
82-471-620-01 VC
87-030-053-01 |FM ceramic filter
(EE model only)
CF 501,502,
87-030-054-01 FM ceramic filter
503,504 CFT601
87-008-118-01
(UK model only} AM ceramic filter transformer (EE model only)
CF T601
87-008-152-01
AM ceramic filter transformer (UK model only)
LPF501,502 SF R501 ,502
87-030-048-01 87-021-366-01
Low pass filter Semi-fixed resistor, 10k2-B
C6 15,624
< Capacitors >
87-015-318-01 0.1uF
50V Aluminum solid
< CONTROL PCB-B Q301,302 Q303,304,
401,402 VR1,2,3,4
VR56
VR78 S6~10
CIRCUIT BOARD SECTION >
82-488-604-01 Control circuit board 89-307-326-01 Transistor, 2SC732 (BL) 89-309-456-01 Transistor, 2SC945L (P)
|82-488-622-01 82-488-621-01 82-488-620-01 82-488-602-01
Volume, 50k2-A (BASS, TREBLE) Volume, 50kQ-MN (BALANCE) Volume, 100k2-8:CT (VOLUME) Push switch (HI-FILTER, LOUDNESS, STEREO/MONO,
$171,12
87-031-409-01
FM MUTING, AFC) Lever switch (TURNOVER FREQUENCY/DEFEAT
PIN-A PIN-B
R337,419
| | 87-032-774-01
!87-032-776-01
87-025-103-01
SELECTOR) Pin, 4P Pin, 6P
< Resistor >
1.5k2 1W
Nonflammable
resistor
Symboi No.
Description
C401 ,402 C317,318 C409,410 C305,306
87-015-240-01 87-015-241-01 87-015-242-01 87-015-244-01
< Capacitors >
0.47uF 50V
1uF
50V
2.2uF
50V
4.7 uF 50V
LL Electrolytic LL Electrolytic LL Electrolytic LL Etectrolytic
< EQ CIRCUIT BOARD SECTION >
PCB-C Q1,2 Q3,4,5,6 Q101,102,103,
82-488-605-01 89-108-725-01 89-3 12-222-01 89-309-456-01
EQ circuit board Transistor, 2SA872 (E) Transistor, 2SC1222 (E) Transistor, 2SC945L (P)
104 87-032-633-01 Pin, 3P
87-032-636-01 Pin, 6P
87-032-639-01 Pin, OP
< Capacitors >
C1,2
87-015-244-01 4.7uF
50V LL Electrolytic
<MAIN AMP/POWER CIRCUIT BOARD SECTION >
PCB-D
82-488-650-01 Main amp/Power circuit board
Q701,702
89-108-416-01 Transistor, 2SA841 (BL)
0703,704,
89-31 7-353-01 Transistor, 2SC1735 (D)
707,708 Q705,706 Q709,710 Q801 D801 ,802,
89-309-456-01 89-108-503-01 89-402-344-01 87-027-185-01
Transistor, 2SC945L (P) Transistor, 2SA850 (D) Transistor, 2SD234 (Y) Diode, 30D2
803 ,804 D805 F801
87-027-229-01 87-035-060-01 87-098-01 5-01
Zener diode, HZ-33 (FN) Fuse, 800mA "T"' Fuse label, 800mA "T"'
F802
87-035-119-01 87-098-021-01
Fuse, 3.15A "T" Fuse label, 3.15A °T"'
SFR701,702 PIN-G PIN-H
87-032-527-01 87-021-464-01 87-032-437-01 87-032-773-01
Fuse clamp Semi-fixed resistor, 1kQ2-B Pin, 3P
Pin, 3P
R727,728, 729,730
R803 R731,732 R801
87-025-064-01
87-029-009-01 87-029-007-01 87-029-023-01
< Resistors >
0.472
222
1W
2222
1/4W
4782
1/4W
Nonflammablie resistor Fuse resistor Fuse resistor Fuse resistor
C721,722 C807 C701 ,702 C723 ,724 C803 ,804,
805,806
87-015-334-01 87-015-335-01 87-015-243-01 87-01 2-099-01 87-012-098-01
< Capacitors >
2200uF 35V
4700uF 63V
3.3uNF
50V
0.022uF
0.047uF 100V
Electrolytic Electrolytic LL Electrolytic Ceramic Ceramic
< SWITCH
PCB-E J3,4,5,6
$1,2,3/4,5 PIN-D PIN-C
R201
R202
CIRCUIT BOARD SECTION >
82-488-606-01 Switch circuit board
82-488-624-01 Terminal plate ass'y
82-488-601-01
(PHONO-L,R, TAPE-1,TAPE-2) Push switch (SELECTOR SW)
87-032-776-01 Pin, 6P
87-032-779-01 Pin, OP
87-025-104-01
< Resistors >
3302
iw
87-025-105-01 33022
2W
Nonflammable resistor Nonflammabie resistor
11
Description
< SPEAKER
PCB-F S13
C-B901,902
SWITCH CIRCUIT BOARD SECTION >
82-488-609-01 Speaker switch circuit board 82-488-628-01 Rotary switch (SPEAKER
SELECTOR) 82-488-636-01 Circuit braker, 2.5A
R901,902, 903,904
< Resistor >
87-025-055-01 2702
2W
Nonflammable resistor
<MUTING
PCB-G Q851 Q852 D851
CIRCUIT BOARD SECTION >
82-488-653-01 Muting circuit board 89-316-274-01 Transistor, 2SC1627 (Y) 89-313-647-01 Transistor, 2SC1364 (7) 87-027-083-01 Diode, 181885
<SPEAKER
PCB-H
J7,8,9,10
TERMINAL CIRCUIT BOARD SECTION >
82-488-608-01 Speaker terminal circuit board 82-471-678-01 DIN speaker terminal
(SP A-L,R,B-L,R)
< ANT
PCB-| T501 J1 J2
CIRCUIT BOARD SECTION >
82-488-642-01 ANT circuit board 87-006-050-01 Balun transformer 82-488-656-01 DIN FM antenna terminal 82-488-655-01 DIN AM antenna terminal 82-488-646-01 Antenna terminal, 4P
< LAMP CIRCUIT BOARD
PCB-J-K
82-488-643-01
PL801,802
82-488-647-01
87-032-527-01
SECTION > |
Lamp circuit board Pilot lamp Pilot lamp clamp
<METER
PCB-L-M LMi LM2 PIN-E PIN-F
CIRCUIT BOARD
82-488-641-01 82-488-618-01 82-488-619-01 87-032-772-01 87-032-773-01
SECTION >
Meter circuit board Level meter (SIGNAL) Level meter (TUNING)
Pin, 2P Pin, 3P
Description
< TRANSISTOR CIRCUIT BOARD SECTION >
PCB-N-O-P-Q | 82-471-749-11 Transistor circuit board
Q711,712
89-403-713-01 Transistor, 2SD371(O)
Q713,714
89-205-313-01 Transistor, 2SB531 (O)
< FUSE
PCB-R $15
F803
F804
CIRCUIT BOARD SECTION >
82-488-61 2-01 Fuse circuit board 87-03 1-364-01 Slide switch
(VOLTAGE SELECTOR) 87-035-060-01 Fuse, 800mA "T" 87-098-015-01 Fuse label, 800mA "T"' 87-035-068-01 Fuse, 1.6A "T" 87-098-018-01 Fuse label, 1.6A "T" 87-032-744-01 Fuse clamp
< MISCELLANEOUS >
T801
82-488-613-11
T801
82-488-614-01
D514
87-026-082-01
L601 PL803 PL804 J11 $14 CON-E CON-I CON-H CON-G CON-F CON-A CON-B CON-D CON-C
82-488-645-1 1 82-488-626-01 82-488-627-01 87-032-673-01 87-03 1-408-01 82-488-657-01 82-488-633-01 82-488-638-01 82-488-637-01 82-488-639-01 82-488-632-01 82-488-631-01 82-488-630-01 82-488-629-11
Power transformer (EE model only) Power transformer (UK model only) Light emitting diode, (RED) $8169 (FM STEREO} MW bar antenna coil Pilot lamp (METER)
Pilot lamp (TUNING POINTER) Jack 6.36 (PHONES) Push switch (POWER)
Connector ass'y, 2P Connector ass'y, 2P Connector ass'y, 2P Connector ass`y, 3P Connector ass`y, 3P Connector ass'`y, 4P Connector ass'y, 6P Connector ass'y, 6P Connector ass'y, 9P
C801,802
< Capacitor > 84-190-622-01 0.1uF 250V Line capacitor
AIWACO.,LTD.
771030 (1)--Z
Internet Archive Internet Archive PDF 1.2.2; including mupdf and pymupdf/skimage