Sony SRFPSY-03 Service manual

SRF-PSY03

SERVICE MANUAL

Photo: Violet model

SPECIFICATIONS

US Model

MICROFILM

FM STEREO/AM RADIO

TABLE OF CONTENTS

1. GENERAL ................................................................... 3

2. DISASSEMBLY ......................................................... 4

3. ELECTRICAL ADJUSTMENTS......................... 5

4. DIAGRAMS

4-1. Block Diagram ................................................................ 7

4-2. Printed Wiring Board ...................................................... 9

4-3. Schematic Diagram ......................................................... 11

5. EXPLODED VIEW................................................... 13

6. ELECTRICAL PARTS LIST ............................... 14

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.

– 2 –

SECTION 1

GENERAL

This section is extracted from
instruction manual.

– 3 –

SECTION 2

)

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

MAIN BOARD

4

main board

2

four claws

1

two screws
(P2

×

8)

3

cabinet (rear

5

cabinet (front)

DIAL POINTER SETTING

Note: Follow the assembly procedure in the numerical order given.

pointer

fig.

A

1

Mount the pointer as
shown in the figure

A

.

2

two claws

4

main board

3

Turn CV1 fully in the
arrow direction.

cabinet (front)

– 4 –

2

fig.

B

Mount the knob (TUNE)
as shown in the figure

knob (TUNE)

B

.

SECTION 3

r

r

ELECTRICAL ADJUSTMENTS

0 dB = 1 µV

[AM]

Setting:

BAND switch: AM

AM RF signal

generator

30% amplitude
modulation by
400 Hz signal
Output level: as low as possible

Put the lead-wire
antenna close to
the set.

[FM]

Setting:

BAND switch: FM

FM RF signal

generator

0.01 µF

22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible

set

TP (RF IN)

set

24

Ω

2

jack (HPJ1)

24

Ω

2

jack (HPJ1)

level meter

+
–

level meter

+
–

2nd Local Frequency (57.1 MHz) Adjustment

Setting:

BAND switch: FM

Procedure:

1. Connect the frequency counter to TP (OSC).

2. Adjust L2 for 56.75 MHz reading on the frequency counter.

Specification values: 56.5 to 57.0 MHz

Connection:

frequency counte

1 µF

TP (OSC)

50 V
+

+
–

FM STEREO (38 kHz) Adjustment

Setting:

BAND switch: FM

Procedure:

1. Connect 10 µF Capacitor between TP (38 kHz) and TP (GND).

2. Connect the frequency counter to TP (VCO).

3. Adjust L4 for 38 kHz reading on the frequency counter.

4. Disconnect 10 µF Capacitor in step 1.

• Repeat the procedures in each adjustment several times, and
the frequency coverage and tracking adjustments should be fi­nally done by the timmer capacitors.

AM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L3 520 kHz

CT1 (3/4) 1,750 kHz

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L5 600 kHz

CT1 (4/4) 1,400 kHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter

L6 86.5 MHz

CT1 (1/4) 109.5 MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L1 86.5 MHz

CT1 (2/4) 109.5 MHz

Specification values: 37.95 to 38.05 kHz

Connection:

frequency counte

1 µF

TP (VCO)

50 V

+

+
–

– 5 –

Adjsutment Location:

– MAIN BOARD (Component Side) –

L3 AM Frequency

Coverage
Adjustment

L2 2nd Local

Frequency
(57.1 MHz)
Adjustment

L4 FM Stereo (38 kHz)

Adjustment

HPJ1

L5 AM Tracking Adjustment

L4

L6 FM Frequency

Coverage Adjustment

L1 FM Tracking

Adjustment

CT1 (4/4) AM Tracking

CT1 (1/4) FM Frequency

FM Stereo (38 kHz)
Adjustment

Coverage
Adjustment

µ

F

10

+

– MAIN BOARD (Conductor Side) –

Adjustment

TP

(GND)

(38 kHz)

CT1 (3/4) AM Frequency Coverage

TP

(OSC)

IC1

TP

Adjustment

TP

(RF IN)

TP

(VCO)

CT1 (2/4) FM Tracking

Adjustment

– 6 –

4-1. BLOCK DIAGRAM

SRF-PSY03

SECTION 4

DIAGRAMS

FM OSC

L5

AM FERRITE-ROD

ANTENNA

CT1 (4/4), L5

AM TRACKING

S1

FM SENS

LOCALDX

CT1 (1/4), L6

FM FREQUENCY

COVERAGE

L6

CT1

(1/4)

CT1

(4/4)

B.P.F.

BPF1

CV1

(1/4)

CV1

(4/4)

FM/AM RF AMP, IF AMP,

MIX, OSC, DET, AGC, AF AMP

30

29

5

4

2

CT1 (2/4), L1

FM TRACKING

FM RF
IN

TV RF
IN

TV OSC

FM OSC

AM RF IN

CV1

TUNE

IC1

TV/FM

TV/FM

TV/FM

RF AMP

AM

RF AMP

L1

FM RF

TV/FM

LOCAL

CT1

(2/4)

MIX

1st

OSC

FM RF

27

CV1

(2/4)

FM 2ND

L2

2ND OSC

2ND LOCAL

FREQUENCY

(57.1MHz)

MIX

1

MIX

2

0°

π/2

1/2

COUNTER

2nd

LOCAL OSC

AM OSC

OSC

2324

PSN

1

PSN

2

FM/AM

CT1

CV1

(3/4)

(3/4)

CT1 (3/4), L3

AM FREQUENCY

COVERAGE

L3

AM OSC

FM

L.P.F.

AM

L.P.F.

FM LIMITER

AMP

AM IF

AMP

S2-1

BAND

AM

FM

FM IF

7

DISCRI

AM

DET

FM

B+

AF

AMP

DETUNE

DET

TUNING

INDICATOR

TUN IND

22

DET
OUT

FM/AM

TV/FM

11

FM/AM

SELECT

TV/FM

SELECT

MPX
IN

12

PLL220PLL1

21

S2-2

BAND

AM

FM

STEREO

DECODER

PD

SYNC

DET

PD214PD1

13

+

19kHz π/2

19kHz 0°

B+

SEP.

CONTROL

COUNTER

AMP

AMP

1/2

DC

MONO/STEREO,

STEREO

INDICATOR

BUFFER

VCO

LOUT

ROUT

PLL

VCO

38kHz

ST IND

16

17

19

15

L4

FM STEREO

(38kHz)

B+

• SIGNAL PATH

: FM

: AM

05

RV1

VOL

HEADPHONE AMP

IC2

IN

POWER

4

–1

IN

POWER

2

–2

AMP

AMP

B+

OUT

OUT

7

HPJ1

2

9

S3

POWER

OFFON

(HEADPHONE)

DRY BATTERY

(IEC DESIGNATION R6)

SIZE “AA”

1PCS. 1.5V

– 7 – – 8 –

4-3. SCHEMATIC DIAGRAM

SRF-PSY03

• IC Block Diagram

IC1 CXA1129N-T4

FM IN

TV INNCFM RF

30 29 25 24 232628 27 22 20

FM/TV

FM/TV

RF AMP

FM/TV

MIX

FM/TV

FM/TV

1ST LOCAL

OSC

AGC

AM

RF AMP

2 6 8

1

NC

AM IN

GAIN ADJ

MIX

MIX

345 7 9 10 11 12 13 14 15

AGC1

1

2

FM OSC

OL AGC

OVER LOAD

AGC

AFC

TV OSC

0

π/2

PSN

1

PSN

2

AF AMP

LPF

NC

2ND OSC

LOCAL

OSC

1/2

COUNTER

FM IF

AM OSC

FM/AM

FM

LPF

AM

BPF

DETUNE

DET

NC

TUN IND

FM/TV

FM/TV

SELECT

FM

DISCRI

FM

LIMITTER

AMP

AM IF AMP

(FM TUN IND)

AM

DET

AGC

TUNING

IND

AGC2

MUTE

PLL1

PLL2

DET OUT

MUTE

VCO OSC

38KHz

VCO

CONTROL

DECORDER

SEP

ST.

INPUT

BUFF

VCO

LEVEL

CONTROL

MPX IN

VCO CONT

BUFF
AMP

DC

AMP

PD

SYNC

DET

38KHz

R CH
AMP

19KHz

π/2

19KHz

R OUT

1/2

COUNTER

0

FM/AM

SELECT

M/ST.SW

ST.IND

PD1

FM/AM

PD2

L CH
AMP

LOAD

SELECT

1617181921

L OUT

ST IND

Note on Schematic Diagram:

• 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 Ω and 1/
specified.

¢

•

: internal component.

4

W or less unless otherwise

• C : panel designation.

• U : B+ Line.

• H : adjustment for repair.

• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.

• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
(): AM

• Voltages are taken with a V OM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc­tion tolerances.

• Signal path.

F : FM
f : AM

– 11 –

– 12 –

SECTION 5

EXPLODED VIEW

MAIN

SECTION 6

ELECTRICAL PARTS LIST

NOTE:

• -XX and -X mean standardized parts, so they
may have some difference from the original
one.

• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)

3

↑↑

Parts Color Cabinet's Color

not supplied

• 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.

• Accessories and packing materials are given
in the last of the electrical parts list.

not supplied

13

6

9

14

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 and -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

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark

* A-3683-018-A MAIN BOARD, COMPLETE

*********************

< BAND PASS FILTER >

BPF1 1-236-711-21 FILTER, BAND PASS

< CAPACITOR >

C2 1-163-101-00 CERAMIC CHIP 22PF 5% 50V
C3 1-126-163-11 ELECT 4.7uF 20% 50V
C4 1-163-181-00 CERAMIC CHIP 100PF 5% 50V
C5 1-163-220-11 CERAMIC CHIP 3PF 0.25PF 50V
C6 1-163-143-00 CERAMIC CHIP 0.0012uF 5% 50V

• 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

CV1 1-151-700-11 CAP, VAR (TUNE)

D1 8-719-991-33 DIODE 1SS133T-77
D2 8-719-991-33 DIODE 1SS133T-77

HPJ1 1-563-857-11 JACK, HEADPHONE (2)

When indicating parts by reference
number, please include the board.

< VARIABLE CAPACITOR >

< DIODE >

< JACK >

< IC >

4

5

2

12

1

Ref. No. Part No. Description Remark

1 3-011-422-11 CABINET (FRONT) (BLUE)
1 3-011-422-21 CABINET (FRONT) (VIOLET)
2 3-011-425-01 KNOB (POWER) (BLACK) . . . (VIOLET)
2 3-011-425-21 KNOB (POWER) (YELLOW) . . . (BLUE)
3 3-011-741-31 PLATE, TRANSPARENT (for BLUE)

3 3-011-741-41 PLATE, TRANSPARENT (for VIOLET)
4 3-011-430-01 POINTER (ORANGE) . . . (BLUE)
4 3-011-430-11 POINTER (BLUE) . . . (VIOLET)

* 5 A-3683-018-A MAIN BOARD, COMPLETE

6 3-028-092-02 GUARD (BLUE) . . . (VIOLET)

6 3-028-092-12 GUARD (YELLOW) . . . (BLUE)

11

8

7

10

Ref. No. Part No. Description Remark

7 3-011-424-31 LID, BATTERY CASE (BLUE)
7 3-011-424-41 LID, BATTERY CASE (VIOLET)
8 7-685-105-14 TAPPING +P 2X8 NON-SLIT
9 3-011-423-41 CABINET (REAR) (BLUE)
9 3-011-423-51 CABINET (REAR) (VIOLET)

10 3-011-429-01 KNOB (TUNE)
11 3-011-432-01 SPRING, BATTERY
12 3-011-431-01 TERMINAL, BATTERY
13 3-028-093-01 CLIP
14 3-036-709-01 CHAIN

C7 1-162-638-11 CERAMIC CHIP 1uF 16V
C8 1-164-004-11 CERAMIC CHIP 0.1uF 10% 25V
C10 1-164-222-11 CERAMIC CHIP 0.22uF 25V
C11 1-163-023-00 CERAMIC CHIP 0.015uF 5% 50V
C12 1-163-023-00 CERAMIC CHIP 0.015uF 5% 50V

C13 1-162-638-11 CERAMIC CHIP 1uF 16V
C14 1-162-638-11 CERAMIC CHIP 1uF 16V
C15 1-163-087-00 CERAMIC CHIP 4PF 50V
C16 1-162-638-11 CERAMIC CHIP 1uF 16V
C17 1-163-104-00 CERAMIC CHIP 30PF 5% 50V

C18 1-124-257-00 ELECT 2.2uF 20% 50V
C19 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C20 1-104-665-11 ELECT 100uF 20% 16V
C21 1-126-163-11 ELECT 4.7uF 20% 50V
C22 1-104-942-11 ELECT 1uF 20% 50V

C23 1-104-396-11 ELECT 10uF 20% 16V
C24 1-104-942-11 ELECT 1uF 20% 50V
C25 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C26 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C27 1-126-154-11 ELECT 47uF 20% 6.3V

C28 1-164-004-11 CERAMIC CHIP 0.1uF 10% 25V
C29 1-124-463-00 ELECT 0.1uF 20% 50V
C30 1-124-463-00 ELECT 0.1uF 20% 50V
C31 1-124-442-00 ELECT 330uF 20% 6.3V
C32 1-126-154-11 ELECT 47uF 20% 6.3V

C33 1-126-154-11 ELECT 47uF 20% 6.3V
C34 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C35 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C37 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C38 1-163-085-00 CERAMIC CHIP 2PF 50V

< TRIMMER >

CT1 1-151-700-11 CAP, VAR

IC1 8-752-061-76 IC CXA1129N-T4
IC2 8-759-822-48 IC LA4537M

< SHORT >

J1 1-216-296-00 SHORT 0
J2 1-216-295-00 SHORT 0
J3 1-216-295-00 SHORT 0
J4 1-216-295-00 SHORT 0
J5 1-216-295-00 SHORT 0

< COIL >

L1 1-428-781-11 COIL, AIR-CORE
L2 1-428-780-11 COIL, AIR-CORE
L3 1-406-477-11 COIL (AM OSC)
L4 1-406-476-21 COIL (VCO)
L5 1-402-609-11 ANTENNA, FERRITE-ROD (AM)

L6 1-428-779-11 COIL, AIR-CORE
L7 1-409-382-11 COIL, TRAP

< RESISTOR >

R1 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R2 1-216-034-00 METAL CHIP 240 5% 1/10W
R3 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R4 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
R5 1-216-049-11 RES, CHIP 1K 5% 1/10W

R6 1-216-311-00 METAL CHIP 6.8 5% 1/10W
R8 1-216-304-11 METAL CHIP 3.3 5% 1/10W
R9 1-216-304-11 METAL CHIP 3.3 5% 1/10W
R10 1-216-073-00 METAL CHIP 10K 5% 1/10W

< VARIABLE RESISTOR >

RV1 1-241-890-11 RES, VAR, CARBON 20K/20K (VOL)

– 13 –

– 14 –

MAIN

Ref. No. Part No. Description Remark

< SWITCH >

S1 1-571-478-11 SWITCH, SLIDE (FM SENS)
S2 1-571-478-11 SWITCH, SLIDE (BAND)
S3 1-571-478-11 SWITCH, SLIDE (POWER)

**************************************************************

ACCESSORIES & PACKING MATERIALS

********************************

3-866-767-11 MANUAL, INSTRUCTION (ENGLISH) (US)
8-953-342-99 HEADPHONE, STEREO MDR-24//C5SET

Ref. No. Part No. Description Remark

– 15 –

SRF-PSY03

9-926-998-11

Sony Corporation

Personal A&V Products Company

– 16 –

Printed in Singapore © 1999. 4

99D057020-1

Published by Quality Engineering Dept.

(Shinagawa)