Sony ST-SB920 User manual

ST-SB920
AEP Model
UK Model
SERVICE MANUAL
FM STEREO FM-AM TUNER
MICROFILM
SPECIFICATIONS
FM tuner section
Frequency range 87.5 – 108.0 MHz
Aerial terminals 75 Ω, unbalanced
Intermediate frequency 10.7 MHz
Sensitivity at 26 dB quieting
(mono) 10.3 dBf, 0.9 µV/75 Ω
at 46 dB quieting
(stereo) 38.5 dBf, 23 µV/75 Ω
Usable sensitivity (IHF) 10.3 dBf, 0.9 µV/75 Ω
S/N at 40 kHz deviation
80 dB (mono), 76 dB (stereo)
Harmonic distortion WIDE
0.035 % (mono), 0.045 (stereo)
NARROW
0.055 % (mono), 0.075 (stereo)
Frequency response 30 Hz – 15 kHz
(+0.3/–0.7 dB)
Separation 50 dB at 1 kHz
Selectivity at 400 kHz
WIDE 85 dB
NARROW 90 dB
at 300 kHz
WIDE 45 dB
NARROW 70 dB
Output at 40 kHz deviation 600 mV
AM tuner section
Frequency range MW: 522 – 1,611 kHz (9 kHz step)
LW: 144 – 288 kHz (1 kHz step)
Intermediate frequency 450 kHz
Usable Sensitivity (with AM loop aerial)
MW: 200 µV/m
LW: 700 µV/m
Signal-to-noise ratio MW: 54 dB (50 mV/m, 999 kHz)
LW: 50 dB (50 mV/m, 216 kHz)
Harmonic distortion 0.3% (50 mV/m, 400 Hz)
Selectivity 50 dB
General
Power requirements 220 – 230 V, AC 50/60 Hz
Power consumption 12 W
Input impedance 75 Ω
Input connector IEC-male
Dimensions 430 ×86 ×295 mm (w/h/d)
Weight 3.95
Supplied accessories Audio cord (1)
AM loop aerial (1)
FM wire aerial (1)
EON connecting cord (1)
Design and specifications are subject to change without notice.

— 2 —
1. GENERAL ······································································2
2. TEST MODE ··································································3
3. ELECTRICAL ADJUSTMENT································· 5
4. DIAGRAMS
4-1. Circuit Board Location ······················································· 8
4-2. Schematic Diagram – DISPLAY SECTION – ·················· 9
4-3. Printed Wiring Board – DISPLAY SECTION – ············· 11
4-4. Printed Wirng Board – TUNER SECTION – ················· 13
4-5. Schematic Diagram – TUNER SECTION (1/2) – ··········15
4-6. Schematic Diagram – TUNER SECTION (2/2) – ··········17
4-7. IC Pin Function ································································19
4-8. IC Block Diagram ····························································20
6. EXPLODED VIEWS
6-1. Front Panel and Case Section ··········································· 21
6-2. Panel and Display Section ················································22
7. ELECTRICAL PARTS LIST ··································· 23
TABLE OF CONTENTS
SECTION 1
GENERAL
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY MARK!OR DOTTED LINEWITH
MARK !ONTHE SCHEMATIC DIAGRAMS AND INTHE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
PARTS No. MODEL
MODEL IDENTIFICATION
— BACK PANEL —
4-998-494-0π
4-998-494-1π
AEP model
UK model
,,,,,,,,yyyyyyyy
PART NO.
1POWER swtich (U)
2SHIFT button
3Numeric button
4Display window
5DIRECT button
6TUNING/SELECT knob
7DISPLAY button
8PTY button
9TA button
0NEWS/INFO button
!¡ AUTO-BETICAL SELECT button
1 2 3 54 6
7890!¡ !™!£!¢!∞!§ !¶!•!ª@º @¡
Location of Controls
!™ MEMORY button
!£ BAND button
!¢ ON/OFF button
!∞ ANTENNA button
!§ FM MODE button
!¶ CHARACTER button
!• MENU button
!ª RETURN button
@º ENTER button
@¡ TUNING MODE button

— 3 —
SECTION 2
TEST MODE
1. Circuit Check Mode
Set to the reception frequency that the curcuit can STEREO RDS stations. (Set the input level to above 70 dB.)
This enables circuit check to be performed in any of the reception modes-FM,AM (MW, LW). Set to a desired band before setting the test
mode.
1. Turn OFF the power.
2. While pressing 4 and AUTO-BETICAL SELECT together, turn ON U.
•The items in the following table will be checked automatically in order every 2 seconds.
Display
Tuned
IF Frq
Sig Level
Stereo
RDS Signal
Items
AST signal = LOW
IF COUNT OK
SI LEVELh 70dB
ST signal = LOW
RDS DATA OK
FM RDS
OK or NG
OK or NG
OK or NG
OK or NG
OK or NG
AM (MW, LW)
OK or NG
OK or NG
NG
IC251 NG, RV251 adjustments
FE101, IC251 NG, or IF count buffer amp (Q251, Q401) NG
IC221 NG, RV221 adjustments
IC301 NG, RV301 adjustments
IC801 NG
DISPLAY
NOTE : The preset data will be erased when this test mode is used. Therefore, take down the data before setting this mode and preset the
data again after completing operations in this mode.
2. DisplayTube Check and KEY Check mode
1. Turn OFF the power.
2. While pressing 1 and AUTO-BETICAL SELECT together, turn ON U.
3. While continuously pressing 1 and AUTO-BETICAL SELECT together, check the following.
Indication test pattern
* The indication test pattern from 2to 5are indicated on only even grids.
The display changes every 1 sec.
4. Release 1 and AUTO-BETICAL SELECT . The KEY CHECK mode will be set.
5. All key numbers will be displayed.
Key Number : 27
6. Each time the key is pressed, the key number will be counted down.
Each key will be counted only once, at the first time.
7. When all keys have been pressed, the process will end.
Microcomputer version indication (1 sec) All light up “7F” Dot area only “60” Dot area only “7E”
Dot area only “3D”Dot area only “5F”
17F 260 37E 43D 55F

— 4 —
3. Entering the Factory Preset (In case perform just to write memory of the Factory Preset.)
NOTE : As contents of the Factory Preset will be written into memory after completing this check mode, delete contents of memory
according to 4. Forced RESET.
1. Turn OFF the power.
2. While pressing 3 and AUTO-BETICAL SELECT together, turn ON U.
4. Forced RESET (Used to delete the contents of Factory Preset when it is written into the preset memory.)
Clears all the RAMs and sets the initial state
1. Turn OFF the power.
2. While pressing 5 and AUTO-BETICAL SELECT together, turn ON U.
3. When “All clear” is indicated on the display tube, it means that “Forced Reset” has been completed.

— 5 —
SECTION 3
ELECTRICAL ADJUSTMENTS
Precautions in Repairing
If the front end unit fails, it is difficult to repair the inner circuits, so
replace the entire front end unit.
Set “IF : WIDE” after the all adjustments.
•Standard Setting of FM Stereo RF Signal Generator.
How to switch IF BAND :WIDE/NARROW and ANT
ATT : ON/OFF
Method 1:
1. Set the reception mode to FM.
2. Push the MENU button and turn the TUNING/SELECT to
indicate “Reception” on the fluorecent display tube, then press
the ENTER button.
3. Rotate the TUNING/SELECT knob in the clokwise direction.
(Proceeds onto the step 5 when rotated in the counterclokwise
direction.)
4. Turn the TUNING/SELECT knob to indicate “ANT ATT :
OFF” on the fluorescent display tube, then press the ENTERl
button.
5. Turn the TUNING/SELECT knob to indicate “IF : NARROW”
or “IF : WIDE” on the fluorescent display tube, then press the
lENTER button.
When the IF BAND : NARROW is set, “NARROW” is
indicated on the fluorescent display tube.
6. Set WIDE after the operation.
* When set to standby for inputs using the TUNING/SELECTl
knob, “SELECT” is indicated on the fluorecent display tube.
Method 2:
Afterthetestmodes “2.DisplayTube CheckandKEYCheckmode”
or “3. Entering the Factory Preset”, “IF : NARROW” and “IF :
WIDE” are switched every time pressing RETURN button the IF
BAND : NARROW is set “NARROW” is indicated on the
fluorescent display tube.
Likewise, the mode can be switched between “ANT ATT : ON”
and “ANTATT : OFF”. When set toANTATT : ON, the fluorescent
display tube indicatesANT ATT.
FM SECTION 0dB = 1µV
set
FM RF SSG 1kHz
highpass
filter distortion mete
r
FM ANTENNA (75 Ω )LINE OUT
STEREO STANDARD SIGNAL MONAURAL
STANDARD SIGNAL
Carrier frequency : 98MHz
Modulation :Audio 1kHz
Main channel (L+R) : 33.75kHz
deviation
Sub channel (L–R) : 33.75kHz
deviation
Pilot : 7.5kHz
Deviation
Carrier frequency : 98MHz
Modulation : Audio 1kHz
75kHz deviation
FM Discriminator ADJUSTMENT
(NULL and MONO Distortion Adjustment)
Setting:
IF BAND : WIDE
ANTATT : OFF
Procedure:
1. Tune the set to 98 MHz.
2. Adjust IFT252 for 0V reading on the digital voltmeter.
................... NULL
3. Adjust IFT253 for a minimum reading on the distortion meter.
................... MONO Distortion (THD)
4. Repeat the adjustments of 2 and 3 several times.
Note : When replacing the ceramic filter, perform this alignment.
set
FM RF SSG 1kHz
highpass
filter distortion mete
r
FM ANTENNA (75 Ω )
Modulation : Monaural Standard signal
Output level : 6mV (76dB) (at 75
Ω open)
LINE OUT
Digital Voltmete
r
(DC range)
TP251
NULL terminal

— 6 —
Stereo Level Adjustment
Setting:
IF BAND : WIDE
ANTATT : OFF
Procedure:
1. Tune the set to 98 MHz.
2. Adjust RV251 to the point (moment) when the “STEREO”
indicator will change from going off to going on.
Narrow Gain Adjustment
Setting:
IF BAND : NARROW
ANTATT : OFF
Procedure:
1. Tune the set to 98 MHz.
2. Set “IF BAND : NARROW” according to the procedure of
“How to switch IF BAND WIDE/NARROW” on page 6.
3. Adjust RV231 to the point (moment) when the “STEREO”
indicator will change from going off to going on.
FM Meter Level Adjustment
Setting:
IF BAND : WIDE
ANTATT : OFF
Procedure:
1. Tune the set to 98 MHz.
2. Press DISPLAY button to display the digital signal, then adjust
RV221 to be display as “SIG 70dB”.
set
FM RF SSG
FM ANTENNA (75 Ω )
Modulation : Stereo Standard signal
Output level : 18 µ V (25dB) (at 75 Ω open)
set
FM RF SSG
FM ANTENNA (75 Ω )
Modulation : Stereo Standard signal
Output level : 18 µ V (25dB) (at 75 Ω open)
set
FM RF SSG
FM ANTENNA (75 Ω )
Modulation : Stereo Standard signal
Output level : 3mV (76dB) (at 75 Ω open)
Stereo Separation Adjustment
Setting:
IF BAND : WIDE
Procedure:
1. Refer to “How to switch IF BANDWIDE/NARROW” on page
6.
L-CH Stereo separation : A– B
R-CH Stereo separation : C– D
The separations of both channels should be equal.
set
FM RF SSG
FM ANTENNA (75 Ω ) LINE OUT
level mete
r
Modulation : Stereo Standard signal
Output level : 6mV (76dB) (at 75
Ω open)
FM stereo
Signal generator
Output channel
L-CH
R-CH
R-CH
L-CH
Level meter
connection
L-CH
L-CH
R-CH
R-CH
Level meter
reading (dB)
A
B
Adjust RV301 for minimum
reading on Level meter
C
D
Adjust RV301 for minimum
reading on Level meter

— 7 —
AM SECTION
AM Meter Level Adjustment
Setting:
BAND : LW
Procedure:
1. SetAM RF signal generator so that theAM antenna input level
becomes 74dBµ/m.
2. Adjust RV402 so that 1 to 10 indication bars light up on the
signal meter.
Adjustment Location
[TUNER BOARD] — Component Side —
AM RF SSG
loop antenna
set
loop antenna
(Supplied accessories)
60 cm AM antenna
terminal (TM1)
30% amplitude
modulation by
400 Hz signal
Carrier frequency : 216kHz
Modulation : AUDIO 400Hz, 30% modulation
Field strength dB (
µ V/m) =SSG output level dB ( µ V/m) –26 dB.
FE101
RV402
AM Meter Level
RV251
Stereo Level
RV221
FM Meter Level
RV231
Narrow Gain
IFT252
(NULL)
TP251 (NULL)
RV301
Stereo
Separation
IFT253
(THD)
IFT252, 253
FM Discriminator
CNP702
18

— 8 —
• Waveforms
•U: B+ Line.
•V: B– Line.
• Voltages and waveforms are dc with respect to ground under
no-signal (detuned) conditions.
no mark : FM
( ) : MW
< > : LW
∗: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tol-
erances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tol-
erances.
• Circled numbers refer to waveforms.
• Signal path.
F: FM
f: AM
For printed wiring boards.
Note:
•X: parts extracted from the component side.
•b: Pattern from the side which enables seeing.
Note:
The components identified by mark !or dotted line with
mark !are critical for safety.
Replace only with part number specified.
• Indication of transistor
CThese are omitted EB
IC701 !¡ X2
2
5.2 Vp-p
4.19MHz
4.332MHz
IC801 !£ OSC1
1
3.6 Vp-p
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in
each block.)
For schematic diagrams.
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 speci-
fied.
•¢: internal component.
•C: panel designation
SECTION 4
DIAGRAMS
4-1. CIRCUIT BOARDS LOCATION
POWER SW board
TRANS board
TUNER board
DISPLAY board
ENCODER board

ST-SB920
— 9 — — 10 —
4-2. SCHEMATIC DIAGRAM – DISPLAY SECTION – • See page 8 for Waveforms. • See page 19 for IC Pin Function.

ST-SB920
— 11 — — 12 —
4-3. PRINTED WIRING BOARD – DISPLAY SECTION – • See page 8 for Circuit Boards Location.
DISPLAY BOARD
TRANS BOARD POWER SW BOARD
ENCODER
BOARD
B
TUNER BOARD
CNP701
A
TUNER BOARD
CNP702
C
TUNER BOARD
CNP952
1-668-809-
11
(11)
1-668-810-
11
(11)
1-669-149-
1-668-809-
11
(11)
11
(11)
AC
IN
SHIFT
DISPLAYPTYTAMEMORYBANDON/OFFANTENNAFM MODECHARACTERMENUENTER RETURN
DIRECT
TUNING/SELECT
TUNING
MODE
NEWS
/INFO
AUTO-BETICAL
SELECT
0 9 8 7 6 2
3
4
5 1
16
S901
1
2
CN951
1
2
1
2
ECP900
1
5
123
1
18
9
1
1
100 3
3031
50
51
80 81
FL701 FLUORESCENT INDICATOR TUBE
12
A
B
C
D
E
F
G
34567891011121314
• Semiconductor
Location
Ref. No. Location
D701 C-13
D702 B-13
D703 B-13
D705 C-13
D707 D-13
IC701 B-9
IC702 B-11
Q701 C-13

ST-SB920
—13 — — 14 —
4-4. PRINTED WIRING BOARD – TUNER SECTION – • See page 8 for Circuit Boards Location.
B
DISPLAY BOARD
CN701
C
TRANS
BOARD
CN952
A
DISPLAY BOARD
CN702
1-668-808-
11
(11)
TUNER BOARD
LINE OUT
CNP702 CNP701
CNP952
81
1
1
5
8
916
1
8
E
1
2
3
EE
E
E
NULL
NULL
STEREO
LEVEL
FM METER
LEVEL
AM METER
LEVEL
NARROW
GAIN
STEREO
SEPARATION
EON CONTROL
OUT
18
916
E
E
E
E
E
E
E
EE E E
E
18
916
16
17
20
10
16
19
E
11 10
120
E
E
E
E
FE101
FM FRONT END E
E
E
E
E
17 1
1
1
22
11
12
4
58
2
3
RL
CNJ301
ANTENNA
FM 750
COAXIAL
AB TM401
FE401
AM FRONT
END
IFT
252
IFT252 THD
IFT253
IFT
253
12
A
B
C
D
E
F
G
H
I
345678910111213
• Semiconductor
Location
Ref. No. Location
D221 H-3
D251 H-9
D301 C-11
D371 B-12
D401 C-4
D402 E-4
D901 C-8
D902 C-8
D903 C-7
D904 C-7
D905 D-7
D906 H-12
D907 D-7
D908 C-8
IC221 H-2
IC251 H-7
IC301 D-11
IC302 C-10
IC401 D-5
IC801 G-11
IC901 D-8
Q200 G-3
Q201 H-4
Q202 H-4
Q204 H-4
Q205 H-5
Q231 G-5
Q232 G-5
Q233 G-4
Q234 H-6
Q235 G-6
Q236 G-6
Q237 G-6
Q251 H-9
Q301 B-10
Q302 B-9
Q303 B-8
Q304 B-8
Q401 E-6
Q402 C-5
Q403 C-5
Q404 D-5
Q405 C-5
Q521 E-8
Q522 E-8
Q523 E-8
Q801 E-11
Q901 D-7

ST-SB920
— 15 — — 16 —
4-5. SCHEMATIC DIAGRAM – TUNER SECTION (1/2) – • See page 20 for IC Block Diagrams.

ST-SB920
—17 — — 18 —
4-6. SCHEMATIC DIAGRAM – TUNER SECTION (2/2) – • See page 8 for Waveforms. • See page 20 for IC Block Diagrams.
BUFFER

— 19 —
4-7. IC PIN FUNCTION (DISPLAY BOARD)
• IC701 System Control (µPD780205GF-040-3BA)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41 to 46
47 to 78
79
80 to 84
85 to 100
Pin Name
VDD
ANT
ATT
BAND1
BAND2
IF-B
NC
MONO
TUN
RESET
X2
X1
GND
NC
LOCK
VDD
CLK
DATA
D-IN
CE
BLN
ST
CAL
AST
AVSS
MUTE
EON
PGM
DATA RDS
R2
KEY 2
KEY 1
SI
AVDD
AVREF
RIN
R1
RDS CLK
POWER
GND
IS 1 to 5
P1 to P32
V LOAD
P33 to P37
G1 to G16
I/O
—
—
—
—
—
—
—
—
—
I
O
I
—
—
I
—
O
O
I
O
—
I
—
I
—
O
O
—
I
O
I
I
I
—
I
I
I
I
I
—
I
O
—
O
O
Function
Power supply (+5V).
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
System reset input.
Oscillation signal output (4.19MHz).
Oscillation signal input (4.19MHz).
Ground.
Not used. (Open)
Lock signal input.
Power supply (+5V).
PLL clock to FE101.
PLL data to FE101.
PLL data from FE101.
PLL Latch to FE101.
Not used. (Open)
Stereo display detection.
Not used. (Open)
Auto stop signal detection.
Ground.(Analog)
Muting signal output.
External control.
Not used. (Open)
RDS data input.
Rotary encoder phase detection.
Key input.
Key input.
Signal input.
Analog power supply (+5V).
Reference voltage (+5V).
Remote control input.
Rotary encoder number of rotation detection.
RDS data clock input.
Power supply ON/OFF monitor.
Ground.
Model detection.
Fluorescent indicator tube, segment drive.
Power supply (-30V).
Drives indication tube.
Fluorescent indicator tube, grid drive.

— 20 —
3 6
11
2 5 81 4
1415 12 91016 13
7
FM IF AMP
LIMITER AF/NULL
METER
QUADRATURE
DET AF AMP
IF OFF
NULL METER
SHORTING
LEVEL
DET METER
DRIVE
MUTING
CIRCUIT DETUNE
DET
GND
B+
36 92 5 81 47 10
18 15 1219 16 1320 17 14 11
AM RF AMP AM IF AMP
AM
MIXING
AGC
AM
OSC
GND B+
(RF)
AM DET
METER
DRIVE
B+
(IF)
1
FM/AM SELECT
MUTING
FM/AM SELECT CONTROL
LOGIC / MUTE ON/OFF MUTING
OUT
LAMP
DRIVE
PLL
GND
MPX
22 21 20 19 18 17 16 15 14 13 12
2 3 4 5 6 7 8 9 10 11
AM +B
VCO MUTE ST
FM
L R
FM/AM
1234
REG
GND
CONTROL
REG
567
4-8. IC BLOCK DIAGRAMS (TUNER BOARD)
IC301 LA3401
IC901 LA5667
IC401 LA1245 IC221, IC251 LA1235
QUALITY BIT
GENERATOR
DEFFERENTIAL
DECODER
BIPHASE
SYMBOL
DECODER
OSCILLATOR
AND
DIVIDER
57kHz
BANDPASS
(8th ORDER)
CONTAS LOOP
VARIABLE AND
FIXED DIVIDER
REFERENCE
VOLTAGE
ANTI-
ALIASING
FILTER
CLOCKED
COMPARATOR
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
RECONSTRUCTION
FILTER
141516 13 12 11 10 9
321 4 5 6 7 8
CLOCK REGENERATION
AND SYNC
VP1
RDCL TS7 OSCO OSCI VDDD VSSD TEST TSTL
D
QUAL
RDDA
Vref
MUX
VDDA
VSSA
CIN
SCOUT
IC801 BU1992

SECTION 5
EXPLODEDVIEWS
NOTE:
• -XX, -X mean standardized parts, so they may
have some differences from the original one.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delayshouldbe anticipatedwhen orderingthese
items.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑ ↑
Parts of Color Cabinet’s Color
• Themechanicalparts withnoreference 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. The components identified by mark !or
dotted line with mark !are critical for safety.
Replace only with part number specified.
— 21 —
When indicating parts by reference number,
please include the board name.
5-1. FRONT PANEL AND CASE SECTION
Ref. No. Part No. Description Remarks
1 X-4949-523-1 FOOT ASSY (F50180S)
2 4-970-124-01 CUSHION (F50180S)
*3 3-703-353-06 SUPPORT, PC BOARD
*4 A-4407-370-A TUNER BOARD, COMPLETE
5 3-710-901-01 SCREW, TAPPING (SILVER)
5 3-710-901-11 SCREW, TAPPING (BLACK)
*6 4-998-495-01 CASE (407026) (BLACK)
6 4-998-495-21 CASE (407026) (SILVER)
7 3-703-244-00 BUSHING, CORD
!8 1-575-651-21 CORD, POWER
!9 1-770-019-11 ADAPTOR, CONVERSION PLUG 3P (UK)
*10 4-998-494-01 PANEL, BACK (AEP)
*10 4-998-494-11 PANEL, BACK (UK)
11 3-704-515-01 SCREW (BV/RING)
*12 1-669-149-11 TRANS BOARD
!PT901 1-423-525-11 TRANSFORMER, POWER
Ref. No. Part No. Description Remarks
b
b
a
a
1
not supplied
not supplied
not
supplied
not
supplied
not supplied
PT901
2
4
5
55
5
3
8
7
12 9
10
11
6
#1
#1 #1
#1
#1
#1
#2
#1
#1
#1
#1

— 22 —
5-2. PANEL AND DISPLAY SECTION
rA : ENCODER BOARD (supplied with DISPLAYBOARD)
Ref. No. Part No. Description Remarks
51 4-998-493-01 PANEL, FRONT (BLACK)
51 4-998-493-11 PANEL, FRONT (SILVER)
52 4-942-568-41 EMBLEM (NO.5), SONY
53 4-998-489-01 PLATE (C), INDICATION
54 4-998-486-01 BUTTON (A)
55 4-999-566-01 BUTTON (S)
56 3-024-055-01 BUTTON (POWER)(BLACK)
56 3-024-055-21 BUTTON (POWER)(SILVER)
*57 1-668-810-11 POWER SW BOARD
*58 4-998-481-01 INSULATED PLATE (DS)
*59 4-945-292-01 HOLDER,INDICATION TUBE
*60 A-4407-371-A DISPLAY BOARD, COMPLETE
62 4-998-485-01 HINGE (BLACK)
Ref. No. Part No. Description Remarks
62 4-998-485-11 HINGE (SILVER)
63 4-998-488-01 BUTTON (C) (BLACK)
63 4-998-488-11 BUTTON (C) (SILVER)
64 4-998-492-01 DOOR (BLACK)
64 4-998-492-11 DOOR (SILVER)
66 4-998-491-01 KNOB (R41) (BLACK)
66 4-998-491-11 KNOB (R41) (SILVER)
68 4-998-487-01 BUTTON (B) (BLACK)
68 4-998-487-11 BUTTON (B) (SILVER)
69 4-998-484-01 SPRING, CLICK
70 4-998-490-01 BASE, PANEL (BLACK)
70 4-998-490-11 BASE, PANEL (SILVER)
FL701 1-517-177-21 FLUORESCENT INDICATOR TUBE
51
52
#4
53
54
55
56
57
58
70
rA
68
69
62 62
63
66
64
59
60
#1
FL701
#1
#3
#1 #1
not supplied
supplied with RV701
supplied with No. 66
not supplied

• 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.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delayshouldbe anticipatedwhen orderingthese
items.
• CAPACITORS:
uF: µF
• RESISTORS
All resistors are in ohms.
METAL: metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F: nonflammable
• COILS
uH: µH
• SEMICONDUCTORS
In each case, u: µ, for example:
uA...: µA... , uPA... , µPA... ,
uPB... , µPB... , uPC... , µPC... ,
uPD..., µPD...
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 23 —
SECTION 6
ELECTRICAL PARTS LIST
NOTE:
When indicating parts by reference number,
please include the board name.
The components identified by mark !or
dotted line with mark !are critical for safety.
Replace only with part number specified.
*A-4407-371-A DISPLAY BOARD, COMPLETE
***********************
(including ENCODER BOARD)
*4-945-292-01 HOLDER, INDICATION TUBE
4-998-481-01 INSULATED PLATE (DS)
< CAPACITOR >
C701 1-162-306-11 CERAMIC 0.01uF 20% 16V
C702 1-162-306-11 CERAMIC 0.01uF 20% 16V
C703 1-162-209-31 CERAMIC 27PF 5% 50V
C704 1-162-209-31 CERAMIC 27PF 5% 50V
C705 1-162-306-11 CERAMIC 0.01uF 20% 16V
C706 1-164-159-21 CERAMIC 0.1uF 50V
C707 1-126-947-11 ELECT 47uF 20% 35V
C708 1-162-306-11 CERAMIC 0.01uF 20% 16V
C709 1-162-306-11 CERAMIC 0.01uF 20% 16V
C710 1-126-964-11 ELECT 10uF 20% 50V
C711 1-126-964-11 ELECT 10uF 20% 50V
C712 1-104-905-11 CAPACITOR 0.22F 5.5V
C713 1-162-306-11 CERAMIC 0.01uF 20% 16V
C714 1-126-959-11 ELECT 0.47uF 20% 50V
C717 1-162-286-21 CERAMIC 220PF 10% 50V
< FILTER >
FL701 1-517-177-21 INDICATOR TUBE, FLUORESCENT
< DIODE >
D701 8-719-991-33 DIODE 1SS133T-77
D702 8-719-991-33 DIODE 1SS133T-77
D703 8-719-991-33 DIODE 1SS133T-77
D705 8-719-991-33 DIODE 1SS133T-77
D707 8-719-991-33 DIODE 1SS133T-77
< IC >
IC701 8-759-495-96 IC uPD780205GF-040-3BA
IC702 8-749-014-66 IC NJL56H400A
< TRANSISTOR >
Q701 8-729-119-78 TRANSISTOR 2SC403SP-51
< RESISTOR >
R701 1-249-437-11 CARBON 47K 5% 1/4W
R702 1-249-429-11 CARBON 10K 5% 1/4W
R703 1-249-429-11 CARBON 10K 5% 1/4W
R704 1-249-419-11 CARBON 1.5K 5% 1/4W F
R705 1-249-419-11 CARBON 1.5K 5% 1/4W F
R707 1-249-441-11 CARBON 100K 5% 1/4W
R708 1-249-441-11 CARBON 100K 5% 1/4W
R709 1-247-807-31 CARBON 100 5% 1/4W
R710 1-249-406-11 CARBON 120 5% 1/4W F
R711 1-249-406-11 CARBON 120 5% 1/4W F
R712 1-249-407-11 CARBON 150 5% 1/4W F
R713 1-249-408-11 CARBON 180 5% 1/4W F
R714 1-247-815-91 CARBON 220 5% 1/4W
R715 1-249-410-11 CARBON 270 5% 1/4W F
R716 1-249-411-11 CARBON 330 5% 1/4W
R717 1-249-413-11 CARBON 470 5% 1/4W F
R718 1-249-414-11 CARBON 560 5% 1/4W F
R719 1-249-416-11 CARBON 820 5% 1/4W F
R720 1-249-418-11 CARBON 1.2K 5% 1/4W F
R721 1-249-421-11 CARBON 2.2K 5% 1/4W F
R722 1-249-424-11 CARBON 3.9K 5% 1/4W F
R723 1-249-430-11 CARBON 12K 5% 1/4W
R724 1-247-807-31 CARBON 100 5% 1/4W
R725 1-249-406-11 CARBON 120 5% 1/4W F
R726 1-249-406-11 CARBON 120 5% 1/4W F
R727 1-249-407-11 CARBON 150 5% 1/4W F
R728 1-249-408-11 CARBON 180 5% 1/4W F
R729 1-247-815-91 CARBON 220 5% 1/4W
R730 1-249-410-11 CARBON 270 5% 1/4W F
R731 1-249-411-11 CARBON 330 5% 1/4W
R732 1-249-413-11 CARBON 470 5% 1/4W F
R733 1-249-414-11 CARBON 560 5% 1/4W F
R734 1-249-416-11 CARBON 820 5% 1/4W F
R735 1-249-418-11 CARBON 1.2K 5% 1/4W F
R736 1-249-421-11 CARBON 2.2K 5% 1/4W F
R737 1-249-424-11 CARBON 3.9K 5% 1/4W F
!R738 1-249-401-11 CARBON 47 5% 1/4W F
R739 1-249-417-11 CARBON 1K 5% 1/4W F
R740 1-247-863-91 CARBON 22K 5% 1/4W
R741 1-247-895-91 CARBON 470K 5% 1/4W
R742 1-249-413-11 CARBON 470 5% 1/4W F
R743 1-249-413-11 CARBON 470 5% 1/4W F
R744 1-249-413-11 CARBON 470 5% 1/4W F
R745 1-249-413-11 CARBON 470 5% 1/4W F
R746 1-249-413-11 CARBON 470 5% 1/4W F
R747 1-249-413-11 CARBON 470 5% 1/4W F
R749 1-249-413-11 CARBON 470 5% 1/4W F
R750 1-249-413-11 CARBON 470 5% 1/4W F
R751 1-249-413-11 CARBON 470 5% 1/4W F
R752 1-249-413-11 CARBON 470 5% 1/4W F
R753 1-249-413-11 CARBON 470 5% 1/4W F
R754 1-249-413-11 CARBON 470 5% 1/4W F
R755 1-247-807-31 CARBON 100 5% 1/4W
R756 1-247-807-31 CARBON 100 5% 1/4W
DISPLAY

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 24 —
< VARIABLE RESISTOR >
RV701 1-466-336-21 ENCODER, ROTARY (TUNING/SELECT)
< SWITCH >
S701 1-554-303-21 SWITCH, TACTILE (SHIFT)
S702 1-554-303-21 SWITCH, TACTILE (1)
S703 1-554-303-21 SWITCH, TACTILE (2)
S704 1-554-303-21 SWITCH, TACTILE (3)
S705 1-554-303-21 SWITCH, TACTILE (4)
S706 1-554-303-21 SWITCH, TACTILE (5)
S707 1-554-303-21 SWITCH, TACTILE (6)
S708 1-554-303-21 SWITCH, TACTILE (7)
S709 1-554-303-21 SWITCH, TACTILE (8)
S710 1-554-303-21 SWITCH, TACTILE (9)
S711 1-554-303-21 SWITCH, TACTILE (0)
S712 1-554-303-21 SWITCH, TACTILE (DIRECT)
S713 1-554-303-21 SWITCH, TACTILE (MENU)
S714 1-554-303-21 SWITCH, TACTILE (RETURN)
S715 1-554-303-21 SWITCH, TACTILE (ENTER)
S717 1-554-303-21 SWITCH, TACTILE (DISPLAY)
S718 1-554-303-21 SWITCH, TACTILE (PTY)
S719 1-554-303-21 SWITCH, TACTILE (TA)
S720 1-554-303-21 SWITCH, TACTILE (NEWS/INFO)
S721 1-554-303-21 SWITCH, TACTILE (AUTO-BETICAL SELECT)
S722 1-554-303-21 SWITCH, TACTILE (MEMORY)
S723 1-554-303-21 SWITCH, TACTILE (BAND)
S724 1-554-303-21 SWITCH, TACTILE (ON/OFF)
S725 1-554-303-21 SWITCH, TACTILE (ANTENNA)
S726 1-554-303-21 SWITCH, TACTILE (FM MODE)
S727 1-554-303-21 SWITCH, TACTILE (CHARACTER)
S728 1-554-303-21 SWITCH, TACTILE (TUNING MODE)
< VIBRATOR >
X701 1-760-422-11 VIBRATOR, CRYSTAL (4.19MHz)
************************************************************
*1-668-810-11 POWER SW BOARD
**************
< CAPACITOR >
!C951 1-113-915-11 CERAMIC 0.001uF 20% 250V
< SWITCH >
!S901 1-572-267-51 SWITCH, PUSH (AC POWER)(1 KEY)
************************************************************
*1-669-149-11 TRANS BOARD
***********
< CAPACITOR >
!C952 1-162-306-11 CERAMIC 0.01uF 20% 16V
< CONNECTOR >
CNP901 1-580-230-11 PIN, CONNECTOR (PC BOARD) 2P
CNP951 1-564-321-00 PIN, CONNECTOR 2P
< EARTH >
ECP900 1-690-880-51 LEAD (WITH CONNECTOR)
< TRANSFORMER >
!PT901 1-423-525-11 TRANSFORMER, POWER
************************************************************
*A-4407-370-A TUNER BOARD, COMPLETE
*********************
7-685-872-09 SCREW +BVTT 3×8 (S)
< CAPACITOR >
C102 1-162-306-11 CERAMIC 0.01uF 20% 16V
C103 1-126-967-11 ELECT 47uF 20% 16V
C104 1-126-967-11 ELECT 47uF 20% 16V
C200 1-162-306-11 CERAMIC 0.01uF 20% 16V
C201 1-162-306-11 CERAMIC 0.01uF 20% 16V
C202 1-162-306-11 CERAMIC 0.01uF 20% 16V
C203 1-162-306-11 CERAMIC 0.01uF 20% 16V
C204 1-162-306-11 CERAMIC 0.01uF 20% 16V
C221 1-162-288-31 CERAMIC 330PF 10% 50V
C222 1-162-306-11 CERAMIC 0.01uF 20% 16V
C223 1-162-306-11 CERAMIC 0.01uF 20% 16V
C224 1-162-306-11 CERAMIC 0.01uF 20% 16V
C225 1-126-967-11 ELECT 47uF 20% 16V
C226 1-162-306-11 CERAMIC 0.01uF 20% 16V
C227 1-126-956-91 ELECT 0.1uF 20% 50V
C231 1-162-306-11 CERAMIC 0.01uF 20% 16V
C232 1-162-306-11 CERAMIC 0.01uF 20% 16V
C235 1-162-215-31 CERAMIC 47PF 5% 50V
C236 1-162-306-11 CERAMIC 0.01uF 20% 16V
C237 1-162-306-11 CERAMIC 0.01uF 20% 16V
C251 1-162-306-11 CERAMIC 0.01uF 20% 16V
C252 1-162-306-11 CERAMIC 0.01uF 20% 16V
C253 1-162-306-11 CERAMIC 0.01uF 20% 16V
C254 1-110-341-11 MYLAR 330PF 5% 50V
C255 1-130-467-00 MYLAR 470PF 5% 50V
C256 1-126-960-11 ELECT 1uF 20% 50V
C257 1-126-967-11 ELECT 47uF 20% 16V
C258 1-162-306-11 CERAMIC 0.01uF 20% 16V
C259 1-126-967-11 ELECT 47uF 20% 16V
C260 1-162-306-11 CERAMIC 0.01uF 20% 16V
C261 1-162-306-11 CERAMIC 0.01uF 20% 16V
C262 1-162-306-11 CERAMIC 0.01uF 20% 16V
C263 1-162-306-11 CERAMIC 0.01uF 20% 16V
C264 1-126-959-11 ELECT 0.47uF 20% 50V
C267 1-162-306-11 CERAMIC 0.01uF 20% 16V
C268 1-162-294-31 CERAMIC 0.001uF 10% 50V
C269 1-162-306-11 CERAMIC 0.01uF 20% 16V
C270 1-162-282-31 CERAMIC 100PF 10% 50V
C301 1-136-161-00 FILM 0.047uF 5% 50V
C302 1-126-967-11 ELECT 47uF 20% 16V
POWER SW TRANS TUNER DISPLAY
The components identified by mark !or dotted
line with mark !are critical for safety.
Replace only with part number specified.

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 25 —
C303 1-136-161-00 FILM 0.047uF 5% 50V
C304 1-162-288-31 CERAMIC 330PF 10% 50V
C306 1-126-967-11 ELECT 47uF 20% 16V
C307 1-130-468-00 MYLAR 560PF 5% 50V
C308 1-130-468-00 MYLAR 560PF 5% 50V
C311 1-130-475-00 MYLAR 0.0022uF 5% 50V
C312 1-130-475-00 MYLAR 0.0022uF 5% 50V
C313 1-126-964-11 ELECT 10uF 20% 50V
C314 1-126-964-11 ELECT 10uF 20% 50V
C315 1-110-335-11 MYLAR 100PF 5% 50V
C316 1-110-335-11 MYLAR 100PF 5% 50V
C317 1-126-963-11 ELECT 4.7uF 20% 50V
C318 1-126-963-11 ELECT 4.7uF 20% 50V
C319 1-126-934-11 ELECT 220uF 20% 16V
C320 1-126-960-11 ELECT 1uF 20% 50V
C321 1-126-960-11 ELECT 1uF 20% 50V
C322 1-126-960-11 ELECT 1uF 20% 50V
C323 1-126-959-11 ELECT 0.47uF 20% 50V
C324 1-126-960-11 ELECT 1uF 20% 50V
C325 1-126-967-11 ELECT 47uF 20% 16V
C351 1-130-471-00 MYLAR 0.001uF 5% 50V
C352 1-130-471-00 MYLAR 0.001uF 5% 50V
C371 1-162-306-11 CERAMIC 0.01uF 20% 16V
C400 1-162-211-31 CERAMIC 33PF 5% 50V
C401 1-162-306-11 CERAMIC 0.01uF 20% 16V
C402 1-162-306-11 CERAMIC 0.01uF 20% 16V
C403 1-162-306-11 CERAMIC 0.01uF 20% 16V
C404 1-126-967-11 ELECT 47uF 20% 16V
C405 1-162-306-11 CERAMIC 0.01uF 20% 16V
C406 1-162-306-11 CERAMIC 0.01uF 20% 16V
C407 1-162-306-11 CERAMIC 0.01uF 20% 16V
C408 1-162-306-11 CERAMIC 0.01uF 20% 16V
C409 1-162-294-31 CERAMIC 0.001uF 10% 50V
C410 1-162-306-11 CERAMIC 0.01uF 20% 16V
C411 1-126-967-11 ELECT 47uF 20% 16V
C412 1-126-960-11 ELECT 1uF 20% 50V
C413 1-126-960-11 ELECT 1uF 20% 50V
C414 1-126-960-11 ELECT 1uF 20% 50V
C415 1-126-962-11 ELECT 3.3uF 20% 50V
C418 1-162-306-11 CERAMIC 0.01uF 20% 16V
C419 1-162-294-31 CERAMIC 0.001uF 10% 50V
C420 1-162-306-11 CERAMIC 0.01uF 20% 16V
C421 1-136-161-00 FILM 0.047uF 5% 50V
C422 1-102-508-91 CERAMIC 10PF 0.5PF 50V
C423 1-102-973-00 CERAMIC 100PF 5% 50V
C424 1-162-306-11 CERAMIC 0.01uF 20% 16V
C425 1-126-964-11 ELECT 10uF 20% 50V
C427 1-130-471-00 MYLAR 0.001uF 5% 50V
C428 1-162-211-31 CERAMIC 33PF 5% 50V
C429 1-162-306-11 CERAMIC 0.01uF 20% 16V
C430 1-162-294-31 CERAMIC 0.001uF 10% 50V
C801 1-126-961-11 ELECT 2.2uF 20% 50V
C803 1-162-306-11 CERAMIC 0.01uF 20% 16V
C804 1-162-291-31 CERAMIC 560PF 10% 50V
C805 1-126-967-11 ELECT 47uF 20% 16V
C806 1-162-306-11 CERAMIC 0.01uF 20% 16V
C807 1-102-852-91 CERAMIC 47PF 5% 50V
C808 1-102-527-11 CERAMIC 82PF 5% 50V
C809 1-162-306-11 CERAMIC 0.01uF 20% 16V
C810 1-162-306-11 CERAMIC 0.01uF 20% 16V
C901 1-101-004-00 CERAMIC 0.01uF 50V
C902 1-101-004-00 CERAMIC 0.01uF 50V
C903 1-126-967-11 ELECT 47uF 20% 50V
C904 1-126-967-11 ELECT 47uF 20% 50V
C905 1-126-953-11 ELECT 2200uF 20% 35V
C906 1-126-969-11 ELECT 220uF 20% 50V
C907 1-126-964-11 ELECT 10uF 20% 50V
C908 1-126-964-11 ELECT 10uF 20% 50V
C909 1-126-967-11 ELECT 47uF 20% 16V
C910 1-126-935-11 ELECT 470uF 20% 6.3V
C911 1-126-959-11 ELECT 0.47uF 20% 50V
< FILTER >
CF201 1-567-389-11 FILTER, CERAMIC
CF202 1-567-389-11 FILTER, CERAMIC
CF203 1-567-389-11 FILTER, CERAMIC
CF231 1-579-554-31 FILTER, CERAMIC
CF301 1-567-250-11 OSCILLATOR, CERAMIC
CF402 1-527-981-00 FILTER, CERAMIC
< JACK >
CNJ301 1-778-940-11 JACK 2P (LINE OUT)
CNJ302 1-566-212-11 PIN, CONNECTOR 3P (EON CONTROL OUT)
< CONNECTOR >
*CNP701 1-568-936-11 PIN, CONNECTOR 9P
*CNP702 1-568-935-11 PIN, CONNECTOR 8P
CNP952 1-766-267-11 PIN, CONNECTOR (PC BOARD) 5P
< DIODE >
D221 8-719-991-33 DIODE 1SS133T-77
D251 8-719-991-33 DIODE 1SS133T-77
D301 8-719-991-33 DIODE 1SS133T-77
D371 8-719-991-33 DIODE 1SS133T-77
D401 8-719-991-33 DIODE 1SS133T-77
D402 8-719-991-33 DIODE 1SS133T-77
D901 8-719-200-82 DIODE 11ES2
D902 8-719-200-82 DIODE 11ES2
D903 8-719-200-82 DIODE 11ES2
D904 8-719-200-82 DIODE 11ES2
D905 8-719-110-69 DIODE RD27ES-B4
D906 8-719-109-97 DIODE RD6.8ES-B2
D907 8-719-200-82 DIODE 11ES2
D908 8-719-991-33 DIODE 1SS133T-77
< FRONTEND >
FE101 1-233-524-11 ENCAPSULATED COMPONENT
FE401 1-233-525-11 ENCAPSULATED COMPONENT
< IC >
IC221 8-759-812-35 IC LA1235
IC251 8-759-812-35 IC LA1235
IC301 8-759-801-80 IC LA3401
IC302 8-759-634-51 IC M5218AP
IC401 8-759-812-45 IC LA1245
IC801 8-759-450-86 IC BU1922
IC901 8-759-820-09 IC LA5667
TUNER