Sony CFM-A50 User manual

CFM-A50
SERVICE MANUAL
RADIO CASSETTE-CORDER
SPECIFICATIONS
US Model
AEP Model
UK Model
Radio section
Frequency range
FM 87.6 – 108MHz (US model)
FM 87.6 – 107MHz (AEP, UK model)
AM 530 – 1,710kHz (US model)
MW 531 – 1,602kHz (AEP, UK model)
LW 153 – 279kHz (AEP, UK model)
Aerials
FM : Telescopic aerial
AM : Built-in ferrite bar aerial
Cassette-corder section
Recording system
2-track 1channel monaural
Fast winding time
Approx. 120 s (sec.) with Sony cassette C-60
Frequency response
TYPE I (normal) : 100 – 8,000Hz
General
Speaker
Full range : 9.2cm dia.,4 ohms, cone type (1)
Output
Earphone jack (minijack)
For 32 ohms impedance earphone
Maximum power output
2.3 W
Power requirements
120V AC, 60Hz (US model)
230V AC, 50Hz (AEP, UK model)
6V DC, four R20 (size D) batteries
Power consumption
AC 6W
Battery life
FM recording
Sony R20P : approx. 13h
Sony alkaline LR20 : approx. 35h
Tape playback
Sony R20P : approx. 7h
Sony alkaline LR20 : approx. 20h
Dimensions
Approx. 289 x 200 x 123 mm (w/h/d)
(111/2 x 7 7/8 x 4 7/8inches) (incl. projecting parts)
Mass
Approx. 2.4 kg (5 lb. 5 oz) (incl. batteries)
Supplied accessory
AC power cord (1)
Earphone (1)
Design and specifications are subject to change without notice.
Model Name Using Similar Machanism NEW
Tape Transport Mechanism Type MF-A50-117
Ver. 1.2 2005.06
9-923-167-14
2005F02-1
© 2005.06
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation

– 2 –
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 3
2. DISASSEMBLY
2-1. Cabinet (Rear) Removal ............................................. 4
2-2. ISS SW Board, Battery Case,
BATTERY Board, POWER Board Removal ............. 4
2-3. Main Board, TUN LED Board,
TACT SW Board Removal ........................................ 5
2-4. H/P JACK Board, Door Ear (PH),
Box Ear (PH) Removal ............................................... 5
2-5. Mechanism Deck, DECK CONTROL Board
Volume Board Removal .............................................. 6
3. DIAL POINTER SETTING......................................... 7
4. ADJUSTMENTS
4-1. Mechanical Adjustment .............................................. 8
4-2. Electrical Adjustment ................................................. 8
5. DIAGRAMS
5-1. Schematic Diagram (AEP,UK Model)...................... 12
5-2. Printed Wiring Boards (AEP,UK Model) ................. 15
5-3. Printed Wiring Boards (US Model) .......................... 19
5-4. Schematic Diagram (US Model) .............................. 23
6. EXPLODED VIEWS
6-1. Cabinet (Rear) Section.............................................. 28
6-2. Cabinet (Front) Section ............................................ 29
6-3. Mechanism Deck Section-1 (MF-A50-117) ............. 30
6-4. Mechanism Deck Section-2 (MF-A50-117) ............. 31
7. ELECTRICAL PARTS LIST.................................... 32
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICALTO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
TABLE OF CONTENTS
HOWTO CHANGEDTHE CERAMIC FILTERS
This model is used three ceramic filters of CF2, CF4 and CF3.
You must used same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must changed three pieces together
since it's supply three pieces in one package as a spare parts.
Mark Center
fequency
red
blue
orange
black
white
10.70MHz
10.67MHz
10.73MHz
10.64MHz
10.76MHz
mark mark
CF2, 4 CF3

– 3 –
SECTION 1
GENERAL
LOCATION AND FUNCTION OF CONTROLS
This section is extracted from
instruction manual.
1FM telescopic aerial
2Carrying handle
3Dial scale
4@(earphone) jack (mini jack)
5LIGHT (Dial scale light) button
6Tape operation buttons
7EARPHONE POCKET box
8SLOW PLAYBACK button
9Cassette compartment lid
!º Frequency marker
!¡ OPR/BATT indicator
!™ EASY LISTENING ADJUSTMENT switch
!£ EASY LISTENING ADJUSTMENT control
!¢ BAND switch
!∞TUNING control
!§ VOLUME control
!¶ FUNCTION switch
!• Built-in microphone
!ª Speaker
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer :
Checkthe antenna terminals,metal trim, “metallized”knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGETEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5mA (500 microampers).
Leakage current can be measured by any one of three methods.
1. Acommercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltagedrop acrossa resistor by means ofaVOM
or battery-operated AC voltmeter. The “limit” indication is
0.75V,so analog metersmust have anaccuratelow-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2VAC range are suitable. (See Fig.A)
AC
voltmeter
(0.75V)
To Exposed Metal
Parts on Set
Earth Ground
0.15 F
µ
1.5kΩ
Fig. A. Using an AC voltmeter to check AC leakage.

– 4 –
SECTION 2
DISASSEMBLY
2-1. CABINET (REAR) REMOVAL
2-2. ISS SW BOARD, BATTERY CASE, BATTERY BOARD, POWER BOARD REMOVAL
Note : Follow the disassembly procedure in the numerical order given.
zThe equipment can be removed using the following procedure.
ISS SW board , BATTERY CASE, BATTERY board, POWER board
Main board, TUN LED board, TACT SW board
Mechanism deck, DECK CONTROL board, VOLUME board
Cabinet (Rear) assy
Set Cabinet (Front) assy
AEP, UK model
H/P JACK board, DOOR EAR (PH),
BOX EAR (PH)
1
4
3
5
ANT1
Knob, TU
Cabinet (Front) assy
Cabinet (Rear) assy
2Screws (+BV 3X14)
2Screws (+BV 3X14)
5
8
7
2
Cabinet (Rear) assy
AEP, UK model
BATTERY board
ISS SW board
Battery cas
e
Cabinet (Rear) assy
Stoper, wire
3Screw
(+BV 3x10)
1Screws (+BV 3x10) 4Shaft, handle
6Shaft, handle
0
9Screw
(+BV 3x10)
Power board
Ver 1.1 2001.11

– 5 –
2-3. MAIN BOARD,TUN LED BOARD,TACT SW BOARD REMOVAL
5
2
4
4
3
7
6
1 Screws (+BV 3x10)
Cabinet (Front) assy
Main board
Chassis, TU
TACT SW board
TUN LED board
2-4. H/P JACK BOARD, DOOR EAR (PH), BOX EAR (PH) REMOVAL
5
1
1
2
3
H/P JACK board
4 Screw (+BV 3x10)
4 Screw (+BV 3x10)
6 Screw
(+BV 3x10)
Box, ear(PH)
DOOR, ear(PH)
Cabinet (Front) assy

– 6 –
2-5. MECHANISM DECK, DECK CONTROL BOARD,VOLUME BOARD REMOVAL
1
6
9
4
2
DECK CONTROL board
Volume board
8 Screws (+BV 3x10)
5 Screws (+BV 3x10
)
3 Screw +BV (3x10)
3 Screws (+BV 3x10)
7 Knob (TONE SW)
7 Knob (VOL)
Cabinet (Front) assy
Mechanism deck

– 7 –
SECTION 3
DIAL POINTER SETTING
Note : Follow the instaooation procedure in the numerical order given.
1Attach TU worm to tuner chassis.
2Attach needle, tighten needle spring using a bolt, then attach TU
LED board.
3Rotate TU worm until needle stops at the stopper shown in Fig. A.
4Mount PLATE BLIND and position it as shown in Fig. B.
5Attach the band knob. Make sure that the projected part of the
tuner chassis fits as shown in Fig. C (the arrow).
6Tighten idler gear, combine projected part of band knob and the
band slider so that they interlock, then mount to main board.
7Mount VR gear to main board, then turn in the direction of the
arrow until it stops.
8Fasten the TU gear to the TU chassis with the screw.
3
Screw (+P 2.6x5)
Retainer, Pointer
Fig. A
Fig. B
Fig. C
1 Worm, TU
5 Knob, ban
d
4 Plate, blind
2 Pointer
Chassis, TU
TUN LED board
Stopper
Screw (+BV 3x10)
Screws (+BV 3x10) Screw (+BV 3x10)
Screw (+B 2.6x5)
7 Gear, VR
6 Gear, idler
8 Gear, TU
Main board Slieder, band
Chassis, TU

– 8 –
SECTION 4
ADJUSTMENTS
4-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts wit2h a denatured-alcohol-moistened
swab :record/playback head pinch roller
erase head rubber belts
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Torque Measurement
Torque Torque Meter Meter Reading
Forward CQ-102C 20 – 55 g•cm
(0.28 – 0.76 oz•inch)
Forward CQ-102C 2 – 5 g•cm
Back Tension (0.028 – 0.069 oz•inch)
Fast Forward CQ-201B more than 50 g•cm
(more than 0.7 oz•inch)
Rewind CQ-201B more than 50 g•cm
(more than 0.7 oz•inch)
Tape Tension Measurement
Torque Meter Meter Reading
CQ-403A more than 70g
(more than 2.47 oz)
4-2. ELECTRICAL ADJUSTMENTS
TAPE RECORDER SECTION
FUNCTION switch : TAPE (RADIO OFF)
SLOW PLAYBACK switch : OFF
EASY LISTENING ADJUSTMENT switch : OFF
VOLUME : MIN
Standard Output Level
Output terminal Earphone Speaker
load impedance 32Ω3.2Ω
output signal level 0.25V (–10dB) 0.775V (0dB)
TestTape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
0dB=0.775V
Record/Playback Head Azimuth Adjustment
Procedure :
1. Playback Mode
2. Rotate the screw to adjust level meter reading to the maximum.
Note : Adjust to the maximum peak though there may be two or
three peakes
3. After the adjustment, lock the adjustment screws with suitable
locking compound.
Adjustment Location :
set
test tape
P-4-A100
(10kHz, -10dB) 32
Ω
level meter
J101 (Earphone jack)
adjustment screw

– 9 – – 11 –– 10 –
TUNER SECTION
AM Section
Function switch : RADIO
Band switch : AM (US model)
MW or LW (AEP, UK model)
Volume : MIN
FM Section
Function switch : RADIO
Band switch : FM
Volume : MIN
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors. ( ) : AEP, UK only
AM IF ALIGNMENT
Adjust for a maximum reading on level meter.
T1 455kHz
AM (MW) FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 520kHz
CT1 – 2 1,780kHz (1,680kHz)
AM (MW) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 (L6 – 1) 620kHz
CT1 – 1 1,400kHz
Tape Speed Adjustment
Procedure :
1. Mode : Playback (Normal Speed)
2. Adjust RV103 so becomes the adjustment value below.
3. Set to slow playback switch (S105) ON mode.
Confirm that the become adjustment value as to follows.
Adjustment Value :
Speed checker Digital frequency counter
–1 to +1% 2,970 – 3,030Hz
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45Hz).
Adjustment Location :
set
test tape
WS-48B
(3kHz, 0dB) 32
Ω
speed checker
LFM-30 or
digital frequenc
y
counter
J101 (Earphone jack)
[DECK CONTROL BOARD]
(Component side)
RV103 : Tape speed Adjustmen
t
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
32 Ω
J101 (Earphone jack)
level mete
r
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
telescopi
c
antenna
terminal
0.01
µ F
set
32 Ω
J101 (Earphone jack)
level mete
r
rCIRCUIT BOARDS LOCATION
MAIN board
BATTERY board
DECK CONTROL board
TACT SW board
H/P JACK board
TUN LED board
POWER board
VOLUME board
ISS SW board
(AEP, UK model)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.5MHz (87MHz)
CT1 – 4 109.5MHz (108.30MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 86.5MHz (87MHz)
CT1 – 3 109.5MHz (108.30MHz)
AEP, UK model
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 145kHz
CT6 300kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 – 2 145kHz
CT5 300kHz
Adjustment Location : MAIN board (Component side)
[MAIN BOARD] (Component side)
CT1–3 : FM Tracking Adjustment
CT1–1 : MW Tracking Adjustment
CT5 : LW Tracking Adjustment
L6–2: LW Tracking Adjustment
L6–1: MW Tracking Adjustment
T1 : AM IF Alignment
L2 : FM Frequency Coverage Adjustment
CT1–2 : MW Frequency Coverage Adjustment
CT1–4 : FM Frequency
Coverage Adjustment
L3 : MW Frequency Coverage Adjustment
CT6 : LW Frequency
Coverage Adjustment
L4 : LW Frequency
Coverage Adjustment
L1 : FM Tracking Adjustment
[MAIN BOARD] (Component side)
CT1–3 : FM Tracking Adjustment
CT1–1 : AM Tracking Adjustment
L6 : AM Tracking Adjustment
T1 : AM IF Alignment
L2 : FM Frequency Coverage Adjustment
CT1–2 : AM Frequency Coverage Adjustment
CT1–4 : FM Frequency
Coverage Adjustment
L3 : AM Frequency Coverage Adjustment
L1 : FM Tracking Adjustment
AEP, UK model
US model
SECTION 5
DIAGRAMS

– 12 – – 14 –– 13 –
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
Note: The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 6 V and fed with regulated dc power
supply from external power voltage jack.
5-1. SCHEMATIC DIAGRAM (AEP,UK MODEL) rRefer to page 26 for IC Block Diagrams.
CFM-A50
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : MW, LW
• Voltagesaretaken with aVOM(Inputimpedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM
E: PB
a: REC

– 23 – – 25 –– 24 –
5-4. SCHEMATIC DIAGRAM (US MODEL) rRefer to page 26 for IC Block Diagrams.
Note:
• Allcapacitorsare in µF unless otherwisenoted. pF:µµ F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
Note: The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 6 V and fed with regulated dc power
supply from external power voltage jack.
CFM-A50
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
no mark : FM
( ) : AM
• Voltages are taken with aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
F: FM
E: PB
a: REC

– 26 – – 28 –– 27 –
IC102 CXA1352AS
IC101 MM1315AS
zIC BLOCK DIAGRAMS
IC1 CXA1611P
CONTROL
GRAPHIC EOUALIZER
GRAPHIC EOUALIZER
BIAS
15dB
15dB
29dB
29dB
400Hz 1kHz
4kHz 10kHz DVCC
DC 2
IN 2
VCC
LINE OUT 2
OUT 2 (FIX)
VG
100Hz
BAL
VOL
DC 1
IN 1
GND
LINE
OUT 1
OUT 1
(FIX)
OUT 1
(VARIABLE)
OUT 2 (VARIABLE)
1 SET
21
22
235
4678910
111
12
13
14
15
16
17
1819
20
VOLUME
VOLUME
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
REGULATOR
AM•FE
FM•FE
RIPPLE
FILTER
TUNING
METER
DETUNE
DET
FM•IF
DISCRI
AM•IF
DET•AGC
DETUNE DET CONTROL VCC RIPPLE FILTER DET OUT AFC AGC AFC AGC AM IF OUT GND METER FM IF IN AM IF IN FM/AM BAND SELECT
DETUNE DET
GND
FM DISCRI
AM OSC
AFC
FM OSC
REG OUT
FM RF
AM RF IN
NC
FM RF IN
GND
FM/AM
FE OUT
SW SW SW NC NC SW AUX-IN LPF-2 ALC VCC S VCC POWER GND POWER-OUT-A POP-NOISE-DEL
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
MIC-IN
POWER GND
RIP-FIL
POWER IN
LIN-OUT
R-VCC
NC
SIG-GND
VBIAS2 VBIAS1
PRE
PRE-IN
HEAD-IN(–)
HEAD-IN(+)
MIC-IN (–)
POWER-OUT-B
21
2223
24
252627
28
2930
235
4678910
1
17
1819
20
11 12 13 14 15
16
SECTION 6
EXPLODEDVIEWS
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Color indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ••• (RED)
↑↑
Parts color Cabinet's color
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
6-1. CABINET (REAR) SECTION
The components identified by mark !
or dotted line with mark !are critical
for safety.
Replace only with part number specified.
*1 1-664-064-11 POWER BOARD
2 3-701-418-00 WASHER, SPECIAL
3 X-3373-194-1 HANDLE ASSY
4 3-008-120-01 CABINET (REAR) (US)
4 3-008-120-11 CABINET (REAR) (AEP,UK)
*5 1-664-066-11 BATTERY BOARD
6 3-008-967-01 SPRING (–)
7 3-008-966-01 SPRING (+.–)
8 3-008-122-01 SLIDER, BATTERY
9 3-008-121-01 CASE, BATTERY
10 3-388-438-01 SHAFT, HANDLE
11 3-008-970-01 TERMINAL, ANTENNA
14 3-008-125-01 BRACKET (TU)
*15 3-008-961-01 STOPPER, WIRE
16 1-533-233-31 HOLDER, FUSE
*17 1-664-063-11 ISS SW BOARD (AEP,UK)
*18 3-017-482-01 STOPPER
19 3-015-241-01 CUSHION
20 3-831-441-11 CUSHION
21 3-831-441-99 CUSHION, STOPPER
22 3-703-044-26 LABEL, CAUTION (US)
ANT1 1-501-901-11 ANTENNA, HELICAL
!F901 1-532-285-00 FUSE TIME, LAG (T1.25AL/250V) (AEP,UK)
!F901 1-576-101-11 FUSE, GLASS TUBE (1.25A/250V) (US)
!T901 1-431-070-11 TRANSFORMER, POWER (AEP,UK)
!T901 1-431-735-11 TRANSFORMER, POWER (US)
#2
#2
#3
#1
#2
#1
#1
#1
#1
#1
#1
#1
T901
F901
ANT1
1
2
3
4
5678
910
11
14
15
16
10
20
21
22
19
18
17
AEP,UK Model
US Model
Ver 1.1 2001.11

– 29 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51 X-3373-854-1 CABINET (FRONT) SUB ASSY (WHITE)
(AEP,UK)
51 X-3374-233-1 CABINET (FRONT) SUB ASSY (WOOD)
(AEP,UK)
51 X-3374-851-1 CABINET (FRONT) SUB ASSY (WOOD) (US)
52 3-008-146-01 DOOR, CASSETTE (WHITE) (AEP,UK)
52 3-008-146-11 DOOR, CASSETTE (WOOD)
53 3-914-788-01 SPRING (A), CST
54 3-008-149-01 SENSOR, CASSETTE
55 3-008-147-11 HOLDER, CASSETTE
56 3-008-148-11 WINDOW, CASSETTE
57 3-008-155-31 DOOR, EAR (PH)
58 3-008-156-11 BOX, EAR (PH)
*59 1-664-067-11 H/P JACK BOARD
60 3-008-154-01 KNOB (VOL)
61 3-008-151-01 KNOB, TONE (SW)
62 3-008-163-01 BUTTON (DELAY)
63 3-008-176-01 SLIDER (DELAY)
64 3-008-968-01 SPRING (BUTTON)
65 3-008-169-01 HOLDER, MD
66 3-008-159-11 BUTTON (STOP)
67 3-008-158-11 BUTTON (PLAY)
68 3-008-160-11 BUTTON (PAUSE)
69 3-008-161-11 BUTTON (FF)
70 3-008-162-11 BUTTON (REW)
71 3-008-165-11 BUTTON (REC)
72 3-008-173-01 SPRING (REC)
73 3-008-135-01 POINTER
74 3-008-136-01 POINTER, LED
*75 1-664-061-11 TACT SW BOARD
6-2. CABINET (FRONT) SECTION
77 3-008-140-11 SCALE, DIAL (AEP,UK)
77 3-008-140-21 SCALE, DIAL (US)
*79 A-3306-588-A MAIN BOARD, COMPLETE (AEP,UK)
*79 A-3321-069-A MAIN BOARD, COMPLETE (US)
80 3-008-141-01 GEAR, TU
81 3-008-143-01 GEAR, VR
82 3-008-139-01 SLIDER, BAND
83 3-008-138-01 KNOB, BAND (AEP,UK)
83 3-025-667-01 KNOB, BAND (US)
84 3-008-142-01 GEAR, IDLER
85 3-008-133-01 LIMITTER, TU
86 3-008-132-01 KNOB, TU
87 3-008-137-01 WORM, TU
*88 1-664-062-11 TUN LED BOARD
*89 1-664-069-11 DECK CONTROL BOARD
*90 1-664-065-11 VOLUME BOARD
91 3-008-157-01 HOLDER, VOL
92 3-922-112-21 DAMPER
93 3-008-164-01 BUTTON (RADIO)
94 3-008-152-11 BUTTON (LIGHT)
95 3-014-372-01 RETAINER, POINTER
96 4-826-537-11 WASHER, SPECIAL
97 3-831-441-99 CUSHION (B)
98 3-025-668-01 BAND, SPRING (US)
99 3-025-669-01 SCREW (US)
100 A-3250-739-A MECHANISM DECK (MF-A50-117)
MIC101 8-814-186-00 MICROPHONE, ELECTRET CONDENSER
SP101 1-505-502-11 SPEAKER (9.2cm)
#1
#1
not
supplied
#1
#1
#1
SP101
#1 #1
#1
#1
#1
#1
#1
#1
#1
#1
#4
#4
#6
#1
#1
51
52
53
54
55
56
57
58
59
60
61 62
63
64
65
66
67 68 69 70
71
72
96 73
95
74
75
93
94
77
79
100 80
81
82
83
84
85
86
98
99
87
88
97
89
90
91
92
MIC101
US Mode
l
Ver. 1.2

– 30 –
101 3-933-010-01 SPRING (S/P), TORSION
102 3-933-025-01 SPRING (P), TORSION
103 3-933-026-01 LEVER (P)
104 3-933-024-01 ROLLER, PINCH
105 3-933-019-01 SPRING (F/R), TORSION
106 3-933-028-01 SPRING (FWD), TORSION
107 3-933-016-01 GEAR (S REEL)
*108 3-933-023-11 SLIDER (REC)
109 3-933-022-01 BASE, HEAD
*110 3-933-017-11 SLIDER (REW)
*111 3-933-018-11 SLIDER (FF)
*112 3-933-009-11 SLIDER (STOP)
*113 3-933-008-11 SLIDER (PAUSE)
114 3-933-004-01 CLAW, REEL
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
*115 3-933-021-01 SLIDER (FRP)
*116 3-933-006-01 SLIDER (EJECT)
117 3-934-833-01 SPRING (FRP)
118 3-934-834-01 SPRING (BT)
119 3-933-007-01 PLATE, LOCK
*123 3-009-076-01 CHASSIS (HEAD)
124 3-010-625-01 GUIDE, TAPE
125 3-342-917-01 SCREW (IT3-C), TAPPING, + B
126 3-936-265-01 LUG (T), PLATE
127 4-936-201-01 SPRING, COMPRESSION
128 3-015-242-01 SHEET, TU
HE101 1-500-131-11 HEAD, MAGNETIC (ERASE)
HRP101 1-500-363-11 HEAD,MAGNETIC(RECORD/PLAYBACK)
6-3. MECHANISM DECK SECTION-1
(MF-A50-117)
HE101
HRP101
101
128
102
103 104
105 106
107
108
112
110
111
126
109
127
123
124
125
113
114
115
116
117
118
119
#5 #5

– 31 –
6-4. MECHANISM DECK SECTION-2
(MF-A50-117)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
151 3-933-029-01 LEVER, ERASING PREVENTION
152 3-933-182-01 SPRING, CASSETTE
153 3-932-995-01 GEAR (MID)
154 X-3371-667-1 CLUTCH ASSY
155 3-932-997-01 GEAR (CAM)
*156 3-932-999-01 SLIDER (SW)
157 3-932-998-01 SPRING (GROUND), TORSION
158 3-009-648-01 LEVER (S.OFF)
159 3-009-650-02 SPRING (K), COMPRESSION
160 X-3373-572-1 REEL ASSY (N), T
161 3-933-020-01 BELT
162 X-3371-668-1 CAPSTAN ASSY
163 3-932-993-22 CHASSIS, OUTSERT
164 3-343-358-01 RING, RETAINING
165 3-933-005-01 SPRING (CAM), COMPRESSION
166 3-934-336-01 BEARING
167 3-939-383-02 SPRING, COMPRESSION
168 3-936-438-01 LEVER (K)
169 3-016-349-01 WASHER
C301 1-131-381-00 TANTALUM 47uF 10% 10V
C155 1-162-839-11 CERAMIC 0.01 10% 16V
M101 A-3311-283-A MOTOR ASSY
S106 1-762-679-11 SWITCH, LEAF (TAPE POWER)
M101
S106
C155
C301
151
152
153
154
155
156
157
158
159
160
168
161
162
163
164
165
169
166
167
#4

– 32 –
NOTE :
• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• RESISTORS
All resistors are in ohms
METAL : Metal-film resistor
METAL OXIDE :Metal oxide-film resistor
F : nonflammable
• Items marked “ * ”are not stocked since
they are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example :
uA.... : µA.... , uPA.... : µPA....
uPB.... : µPB.... , uPC.... : µPC....
uPD.... : µPD....
• CAPACITORS
uF : µF
• COILS
uH : µH
When indicating parts by reference num-
ber, please include the board.
The components identified by mark !
or dotted line with mark !are critical
for safety.
Replaceonlywithpartnumber specified.
SECTION 7
ELECTRICAL PARTS LIST
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
*1-664-066-11 BATTERY BOARD
**************
3-008-967-01 SPRING (–)
************************************************************
*1-664-069-11 DECK CONTROL BOARD
*******************
< CAPACITOR >
C141 1-136-169-00 FILM 0.22uF 5% 50V
< CONNECTOR >
*CN108 1-580-158-11 PIN, CONNECTOR (PC BOARD) 6P
< DIODE >
D110 8-719-057-90 LED L-974HD (OPR/BATT)
< COIL >
L102 1-410-509-11 INDUCTOR 10uH
< RESISTOR >
R131 1-249-414-11 CARBON 560 5% 1/4W
R132 1-249-411-11 CARBON 330 5% 1/4W
R133 1-249-435-11 CARBON 33K 5% 1/4W
R134 1-249-427-11 CARBON 6.8K 5% 1/4W
R143 1-249-417-11 CARBON 1K 5% 1/4W
< VARIABLE RESISTOR >
RV103 1-228-991-00 RES, ADJ, METAL 2.2K (TAPE SPEED)
< SWITCH >
S104 1-570-347-11 SWITCH, LEVER SLIDE (FUNCTION)
S105 1-571-890-11 SWITCH, LEAF (SLOW PLAYBACK)
************************************************************
*1-664-067-11 H/P JACK BOARD
**************
< CAPACITOR >
C138 1-104-664-11 ELECT 47uF 20% 16V
C143 1-104-664-11 ELECT 47uF 20% 16V
< DIODE >
D106 8-719-987-63 DIODE 1N4148M
D109 8-719-987-63 DIODE 1N4148M
< JACK >
J101 1-566-891-21 JACK (@)
< RESISTOR >
R129 1-249-399-11 CARBON 33 5% 1/4W
R144 1-249-399-11 CARBON 33 5% 1/4W
************************************************************
*1-664-063-11 ISS SW BOARD (AEP,UK)
*************
< SWITCH >
S107 1-570-083-11 SWITCH, SLIDE (ISS) (AEP,UK)
************************************************************
*A-3306-588-A MAIN BOARD, COMPLETE (AEP,UK)
*A-3321-069-A MAIN BOARD, COMPLETE (US)
*********************
< CAPACITOR >
C1 1-162-306-11 CERAMIC 0.01uF 20% 16V
C2 1-162-217-31 CERAMIC 56PF 5% 50V
(AEP,UK)
C2 1-162-306-11 CERAMIC 0.01uF 20% 16V(US)
C4 1-162-306-11 CERAMIC 0.01uF 20% 16V
C5 1-162-205-31 CERAMIC 18PF 5% 50V
C6 1-104-664-11 ELECT 47uF 20% 16V
C7 1-126-963-11 ELECT 4.7uF 20% 50V
C8 1-162-306-11 CERAMIC 0.01uF 20% 16V
C9 1-124-903-11 ELECT 1uF 20% 50V
C10 1-102-960-00 CERAMIC 24PF 5% 50V(US)
C10 1-102-961-00 CERAMIC 27PF 5% 50V
(AEP,UK)
C11 1-162-187-31 CERAMIC 1PF 20% 50V
C12 1-162-840-11 CERAMIC 0.012uF 10% 16V
(AEP,UK)
C12 1-162-841-11 CERAMIC 0.015uF 10% 16V(US)
BATTERY DECK CONTROL
H/P JACK ISS SW MAIN

– 33 –
C13 1-162-294-31 CERAMIC 0.001uF 10% 50V
C14 1-124-907-11 ELECT 10uF 20% 50V
C15 1-104-664-11 ELECT 47uF 20% 16V
C16 1-162-306-11 CERAMIC 0.01uF 20% 16V
C18 1-104-731-11 FILM 270PF 5% 100V
(AEP,UK)
C19 1-104-732-11 FILM 390PF 5% 100V
(AEP,UK)
C20 1-104-730-11 FILM 200PF 5% 100V
(AEP,UK)
C21 1-102-953-00 CERAMIC 18PF 5% 50V
(AEP,UK)
C21 1-102-998-11 CERAMIC 5PF 0.5PF 50V(US)
C101 1-126-233-11 ELECT 22uF 20% 50V
C102 1-161-045-00 CERAMIC 0.0033uF 10% 50V
C103 1-130-472-00 MYLAR 0.0012uF 5% 50V
C104 1-162-843-11 CERAMIC 0.022uF 10% 16V
C105 1-104-664-11 ELECT 47uF 20% 16V
C106 1-162-286-31 CERAMIC 220PF 10% 50V
C107 1-161-057-00 CERAMIC 0.033uF 10% 50V
C108 1-162-286-31 CERAMIC 220PF 10% 50V
C109 1-126-963-11 ELECT 4.7uF 20% 50V
C110 1-130-475-00 MYLAR 0.0022uF 5% 50V
C111 1-126-961-11 ELECT 2.2uF 20% 50V
C112 1-130-474-00 MYLAR 0.0018uF 5% 50V
C113 1-162-830-11 CERAMIC 0.0018uF 10% 16V
C114 1-162-286-31 CERAMIC 220PF 10% 50V
C115 1-104-664-11 ELECT 47uF 20% 16V
C116 1-130-487-00 MYLAR 0.022uF 5% 50V
C117 1-162-286-31 CERAMIC 220PF 10% 50V
C118 1-162-286-31 CERAMIC 220PF 10% 50V
C119 1-104-664-11 ELECT 47uF 20% 16V
C120 1-104-666-11 ELECT 220uF 20% 10V
C121 1-104-665-11 ELECT 100uF 20% 16V
C122 1-126-963-11 ELECT 4.7uF 20% 50V
C123 1-126-957-11 ELECT 0.22uF 20% 50V
C124 1-124-473-11 ELECT 1000uF 20% 10V
C125 1-162-843-11 CERAMIC 0.022uF 10% 16V
C126 1-104-666-11 ELECT 220uF 20% 10V
C127 1-136-502-11 MYLAR 0.33uF 5% 50V
C128 1-126-233-11 ELECT 22uF 20% 50V
C129 1-104-666-11 ELECT 220uF 20% 10V
C130 1-126-957-11 ELECT 0.22uF 20% 50V
C131 1-162-843-11 CERAMIC 0.022uF 10% 16V
C132 1-124-472-11 ELECT 470uF 20% 10V
C133 1-126-957-11 ELECT 0.22uF 20% 50V
C134 1-126-957-11 ELECT 0.22uF 20% 50V
C135 1-104-663-11 ELECT 33uF 20% 16V
C136 1-104-665-11 ELECT 100uF 20% 16V
C137 1-126-768-11 ELECT 2200uF 20% 16V
C139 1-162-294-31 CERAMIC 0.001uF 10% 50V
C140 1-162-286-31 CERAMIC 220PF 10% 50V
C142 1-162-286-31 CERAMIC 220PF 10% 50V
C144 1-162-286-31 CERAMIC 220PF 10% 50V
C145 1-162-286-31 CERAMIC 220PF 10% 50V
C146 1-162-286-31 CERAMIC 220PF 10% 50V
C147 1-162-303-11 CERAMIC 0.0033uF 30% 16V
C148 1-130-048-00 FILM 220PF 5% 50V
(AEP,UK)
C151 1-162-282-31 CERAMIC 100PF 10% 50V
C152 1-136-495-11 MYLAR 0.1uF 5% 50V(US)
C153 1-136-495-11 MYLAR 0.1uF 5% 50V(US)
C154 1-136-169-00 FILM 0.22uF 5% 50V
< FILTER >
CF1 1-767-615-11 FILTER, CERAMIC
CF2 1-760-262-61 FILTER, CERAMIC
CF3 1-760-262-61 FILTER, CERAMIC
CF4 1-760-262-61 FILTER, CERAMIC
< CONNECTOR >
*CN1 1-580-154-11 PIN, CONNECTOR (PC BOARD) 2P
*CN101 1-580-154-11 PIN, CONNECTOR (PC BOARD) 2P
*CN102 1-580-155-11 PIN, CONNECTOR (PC BOARD) 3P
*CN103 1-580-158-11 PIN, CONNECTOR (PC BOARD) 6P
CN104 1-506-986-11 PIN, CONNECTOR (PC BOARD) 4P
*CN105 1-580-154-11 PIN, CONNECTOR (PC BOARD) 2P
*CN106 1-580-159-11 PIN, CONNECTOR (PC BOARD) 7P
*CN107 1-580-154-11 PIN, CONNECTOR (PC BOARD) 2P
< TRIMMER >
CT5 1-141-438-21 CAP, ADJ (AEP,UK)
CT6 1-141-438-21 CAP, ADJ (AEP,UK)
CT1-1 1-141-461-11 CAP, VAR (AEP,UK)
CT1-1 1-151-628-11 CAP, VAR (US)
CT1-2 1-141-461-11 CAP, VAR (AEP,UK)
CT1-2 1-151-628-11 CAP, VAR (US)
CT1-3 1-141-461-11 CAP, VAR (AEP,UK)
CT1-3 1-151-628-11 CAP, VAR (US)
CT1-4 1-141-461-11 CAP, VAR (AEP,UK)
CT1-4 1-151-628-11 CAP, VAR (US)
< VARIABLE CAPACITOR >
CV1-1 1-141-461-11 CAP, VAR (AEP,UK)
CV1-1 1-151-628-11 CAP, VAR (US)
CV1-2 1-141-461-11 CAP, VAR (AEP,UK)
CV1-2 1-151-628-11 CAP, VAR (US)
CV1-3 1-141-461-11 CAP, VAR (AEP,UK)
CV1-3 1-151-628-11 CAP, VAR (US)
CV1-4 1-141-461-11 CAP, VAR (AEP,UK)
CV1-4 1-151-628-11 CAP, VAR (US)
< DIODE >
D1 8-719-987-63 DIODE 1N4148M
D2 8-719-987-63 DIODE 1N4148M
D101 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D102 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D103 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D104 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D105 8-719-010-39 DIODE UZ-5.1BSC
D111 8-719-010-39 DIODE UZ-5.1BSC
D112 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D113 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
MAIN
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

– 34 –
D114 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D115 8-719-987-63 DIODE 1N4148M
D116 8-719-987-63 DIODE 1N4148M
D117 8-719-987-63 DIODE 1N4148M
D118 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D119 8-719-064-46 LED SLA-560JT3F (TUNING BACK-LIGHT)
D120 8-719-049-26 DIODE RB721Q
D121 8-719-049-26 DIODE RB721Q
< FILTER >
FL1 1-236-022-11 FILTER, BAND PASS
< IC >
IC1 8-752-067-21 IC CXA1611P
IC101 8-759-440-96 IC MM1315AS
IC102 8-752-067-34 IC CXA1352AS
< COIL >
L1 1-422-317-31 COIL, AIR-CORE
L2 1-422-230-11 COIL, AIR-CORE
L3 1-406-253-11 COIL (OSC) (AEP,UK)
L3 1-406-464-61 COIL (OSC) (US)
L4 1-406-252-11 COIL (OSC) (AEP,UK)
L5 1-414-140-11 INDUCTOR 0.68uH
L6 1-402-429-41 ANTENNA, FERRITE-ROD (AM) (US)
L6 1-501-881-11 ANTENNA, FERRITE-ROD (LW/MW) (AEP,UK)
L7 1-416-404-11 COIL, AIR-CORE
L101 1-410-521-11 INDUCTOR 100uH
< TRANSISTOR >
Q101 8-729-036-95 TRANSISTOR KTC3198GR
Q102 8-729-037-13 TRANSISTOR KTA1271Y
Q103 8-729-036-95 TRANSISTOR KTC3198GR
Q104 8-729-036-95 TRANSISTOR KTC3198GR
< RESISTOR >
R1 1-249-421-11 CARBON 2.2K 5% 1/4W
R2 1-249-408-11 CARBON 180 5% 1/4W
R3 1-249-411-11 CARBON 330 5% 1/4W
R4 1-247-807-31 CARBON 100 5% 1/4W
R5 1-249-441-11 CARBON 100K 5% 1/4W
R6 1-249-401-11 CARBON 47 5% 1/4W
R7 1-249-429-11 CARBON 10K 5% 1/4W
R8 1-249-420-11 CARBON 1.8K 5% 1/4W
R10 1-249-416-11 CARBON 820 5% 1/4W
(US)
R12 1-249-429-11 CARBON 10K 5% 1/4W
R13 1-249-425-11 CARBON 4.7K 5% 1/4W
(AEP,UK)
R101 1-249-417-11 CARBON 1K 5% 1/4W
R102 1-249-429-11 CARBON 10K 5% 1/4W
R103 1-249-421-11 CARBON 2.2K 5% 1/4W
R104 1-249-421-11 CARBON 2.2K 5% 1/4W
R105 1-249-402-11 CARBON 56 5% 1/4W
R106 1-247-815-91 CARBON 220 5% 1/4W
R107 1-247-862-11 CARBON 20K 5% 1/4W
R108 1-249-413-11 CARBON 470 5% 1/4W
R109 1-247-807-31 CARBON 100 5% 1/4W
R110 1-247-807-31 CARBON 100 5% 1/4W
R111 1-249-413-11 CARBON 470 5% 1/4W
R112 1-249-393-11 CARBON 10 5% 1/4W
R113 1-249-413-11 CARBON 470 5% 1/4W
R114 1-247-815-91 CARBON 220 5% 1/4W
R115 1-247-807-31 CARBON 100 5% 1/4W
R116 1-249-429-11 CARBON 10K 5% 1/4W
R117 1-247-863-91 CARBON 22K 5% 1/4W
R118 1-249-413-11 CARBON 470 5% 1/4W
R119 1-249-393-11 CARBON 10 5% 1/4W
R120 1-247-897-11 CARBON 560K 5% 1/4W
R121 1-249-432-11 CARBON 18K 5% 1/4W
R122 1-249-429-11 CARBON 10K 5% 1/4W
R123 1-247-807-31 CARBON 100 5% 1/4W
R124 1-249-429-11 CARBON 10K 5% 1/4W
R125 1-249-432-11 CARBON 18K 5% 1/4W
R126 1-247-807-31 CARBON 100 5% 1/4W
R127 1-249-401-11 CARBON 47 5% 1/4W
R128 1-249-437-11 CARBON 47K 5% 1/4W
R130 1-249-411-11 CARBON 330 5% 1/4W
R135 1-249-432-11 CARBON 18K 5% 1/4W
R136 1-247-876-11 CARBON 75K 5% 1/4W
R137 1-249-413-11 CARBON 470 5% 1/4W
R138 1-249-413-11 CARBON 470 5% 1/4W
R139 1-249-413-11 CARBON 470 5% 1/4W
R140 1-249-413-11 CARBON 470 5% 1/4W
R141 1-249-439-11 CARBON 68K 5% 1/4W
R142 1-249-418-11 CARBON 1.2K 5% 1/4W
R145 1-249-417-11 CARBON 1K 5% 1/4W
R146 1-249-438-11 CARBON 56K 5% 1/4W
R147 1-249-413-11 CARBON 470 5% 1/4W
R148 1-249-413-11 CARBON 470 5% 1/4W
R149 1-249-389-11 CARBON 4.7 5% 1/4W
(US)
R150 1-249-389-11 CARBON 4.7 5% 1/4W
(US)
R151 1-249-435-11 CARBON 33K 5% 1/4W
< SWITCH >
S1 1-762-908-11 SWITCH, SLIDE (BAND) (AEP,UK)
S1 1-771-416-11 SWITCH, SLIDE (BAND) (US)
S101 1-572-325-11 SWITCH, SLIDE (REC/PB)
< TRANSFORMER >
T1 1-404-355-00 TRANSFORMER, IF (US)
T1 1-406-575-11 TRANSFORMER, IF (AEP,UK)
T101 1-416-041-11 TRANSFORMER, BIAS OSCILLATION
************************************************************
*1-664-064-11 POWER BOARD
*************
1-533-233-31 HOLDER, FUSE
< CAPACITOR >
C901 1-101-005-00 CERAMIC 0.022uF 50V(US)
C901 1-164-159-11 CERAMIC 0.1uF 50V
(AEP,UK)
MAIN
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
POWER