Sony SRF-PSY03 User manual

MICROFILM
SERVICE MANUAL
FM STEREO/AM RADIO
US Model
SPECIFICATIONS
SRF-PSY03
Photo:Violet model

– 2 –
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 dam-
aged by heat.

– 3 –
SECTION 1
GENERAL This section is extracted from
instruction manual.

– 4 –
MAIN BOARD
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
DIAL POINTER SETTING
Note: Follow the assembly procedure in the numerical order given.
1 two screws
(P2
× 8)
4 main board
2 four claws
3 cabinet (rear
)
2 two claws
5 cabinet (front)
pointer
1 Mount the pointer as
shown in the figure
A .
4 main board
cabinet (front)
3 Turn CV1 fully in the
arrow direction.
2 Mount the knob (TUNE)
as shown in the figure
B .
knob (TUNE)
fig. B
fig. A

– 5 –
0 dB = 1 µV
[AM]
Setting:
BAND switch: AM
[FM]
Setting:
BAND switch: FM
• Repeat the procedures in each adjustment several times, and
the frequency coverage and tracking adjustments should be fi-
nally done by the timmer capacitors.
SECTION 3
ELECTRICAL ADJUSTMENTS
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
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:
FM STEREO (38 kHz) Adjustment
Setting:
BAND switch: FM
Procedure:
1. Connect 10 µF Capacitor between TP (38 kHz) andTP (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.
Specification values: 37.95 to 38.05 kHz
Connection:
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.
+
–
level meter
set
24 Ω
2
jack (HPJ1)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
2 jack (HPJ1)
TP (RF IN)
set
24 Ω
0.01 µ F
1 µ F
50 V
TP (OSC) ++
–
frequency counte
r
1 µ F
50 V
TP (VCO) ++
–
frequency counte
r

– 6 –
Adjsutment Location:
L5 AM Tracking Adjustment
L4 FM Stereo (38 kHz)
Adjustment
L2 2nd Local
Frequency
(57.1 MHz)
Adjustment
L3 AM Frequency
Coverage
Adjustment
HPJ1
L1 FM Tracking
Adjustment
L6 FM Frequency
Coverage Adjustment
L4
– MAIN BOARD (Component Side) –
+
TP
(RF IN)
IC1
TP
(GND)
10
µ F
TP
(OSC)
TP
(VCO)
TP
(38 kHz)
CT1 (4/4) AM Tracking
Adjustment CT1 (3/4) AM Frequency Coverage
Adjustment
CT1 (1/4) FM Frequency
Coverage
Adjustment
FM Stereo (38 kHz)
Adjustment
CT1 (2/4) FM Tracking
Adjustment
– MAIN BOARD (Conductor Side) –

SRF-PSY03
– 7 – – 8 –
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
11
2324
TV/FM
RF AMP
AM
RF AMP
TV/FM
MIX
1st
LOCAL
OSC
1/2
COUNTER
2nd
LOCAL OSC
12
FM RF
IN
TV RF
IN
DET
OUT
MPX
IN
AM OSC
27
FM RF
L5
AM FERRITE-ROD
ANTENNA
FM 2ND OSC
L2
2ND OSC
L3
AM OSC
L1
FM RF
L6
FM OSC
FM/AM RF AMP, IF AMP,
MIX, OSC, DET, AGC, AF AMP
IC1
CT1 (1/4), L6
FM FREQUENCY
COVERAGE
CT1 (3/4), L3
AM FREQUENCY
COVERAGE
2ND LOCAL
FREQUENCY
(57.1MHz)
L4
FM STEREO
(38kHz)
CT1 (4/4), L5
AM TRACKING
CT1 (2/4), L1
FM TRACKING
CV1
TUNE
• SIGNAL PATH
: FM
: AM
05
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
1PCS. 1.5V
HPJ1
(HEADPHONE)
2
B.P.F.
BPF1
FM/AM
MIX
1
MIX
2
PSN
1
FM
L.P.F.
FM LIMITER
AMP
FM
DISCRI STEREO
DECODER
PD
SYNC
DET
DC
AMP VCO
MONO/STEREO,
STEREO
INDICATOR
FM/AM
SELECT
TV/FM
SELECT
BUFFER
1/2
COUNTER
SEP.
CONTROL AMP
AF
AMP
DETUNE
DET
TUNING
INDICATOR
AM
L.P.F.
AM IF
AMP
AM
DET
PSN
2
LOUT
ROUT
TV/FM
FM/AM
TV/FM
TV/FM
TUN IND
0° π/2
19kHz 0°
38kHz B+
19kHz π/2
16
17
ST IND 15
PLL
VCO 19
22
FM IF
7
PD2
14
PD1
13
PLL2
20
PLL1
21
2
30
29
TV OSC
5
FM OSC
AM RF IN
4
CT1
(1/4)
CV1
(1/4)
CT1
(4/4)
CT1
(3/4)
IN
IN
–1
–2
4
2
HEADPHONE AMP
IC2
POWER
AMP
OUT 7
POWER
AMP
OUT 9
CV1
(4/4)
CT1
(2/4)
CV1
(2/4) CV1
(3/4)
FM SENS
S1
BAND
S2-1
LOCALDX
POWER
S3
OFFON
B+
B+
FM
AM
BAND
S2-2
VOL
RV1
B+
FM
AM
+

SRF-PSY03
4-3. SCHEMATIC DIAGRAM
• IC Block Diagram
IC1 CXA1129N-T4
12 6 8
FM/TV
RF AMP
FM/TV
MIX
FM/TV
1ST LOCAL
OSC
AFC
AM
RF AMP
OVER LOAD
AGC
MIX
1
MIX
2
PSN
1
PSN
2
AGC
AF AMP
LPF
DETUNE
DET
FM
LPF
AM
BPF
LOCAL
OSC
1/2
COUNTER
FM/TV
SELECT
FM
DISCRI
FM
LIMITTER
AMP
AM IF AMP
(FM TUN IND)
AM
DET
AGC
TUNING
IND
VCO
MUTE
SEP
CONTROL
ST.
DECORDER
INPUT
BUFF
VCO
LEVEL
CONTROL
BUFF
AMP
DC
AMP
PD
SYNC
DET
R CH
AMP
L CH
AMP
LOAD
SELECT
1/2
COUNTER
FM/AM
SELECT
M/ST.SW
ST.IND
FM/TV
30 29 25 24 232628 27 22 20
345 7 9 10 11 12 13 14 15
1617181921
FM/AM
FM/TV 38KHz
0
π/2
FM/TV
FM/AM
19KHz
π/2
19KHz
0
38KHz
FM IN TV IN NC FM RF GAIN ADJ OL AGC 2ND OSC AM OSC TUN IND PLL1 PLL2 VCO OSC VCO CONT R OUT L OUT
ST IND
PD2 PD1
MPX IN
DET OUT
MUTE
AGC2
NC
FM IF
NC
TV OSC
FM OSC
AGC1
AM IN
NC
– 11 – – 12 –
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 Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Powervoltage is dc 1.5V and fed withregulated dc power
supply from battery terminal.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
():AM
• Voltagesare taken with aVOM (Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM
f: AM

SECTION 6
ELECTRICAL PARTS LIST
– 13 – – 14 –
SECTION 5
EXPLODED VIEW
• 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 num-
ber in the exploded views are not supplied.
• Accessories and packing materials are given
in the last of the 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)
↑↑
Parts Color Cabinet's Color
Ref. No. Part No. Description Remark 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)
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
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
NOTE:
• Due to standardization, replacements in the
parts list may be different from the parts speci-
fied 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
• Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when order-
ing 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
number, please include the board.
*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
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
< VARIABLE CAPACITOR >
CV1 1-151-700-11 CAP, VAR (TUNE)
< DIODE >
D1 8-719-991-33 DIODE 1SS133T-77
D2 8-719-991-33 DIODE 1SS133T-77
< JACK >
HPJ1 1-563-857-11 JACK, HEADPHONE (2)
< IC >
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
6
9
8
7
10
11
12
1
45
2
3
not supplied
not supplied

– 15 –
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
MAIN
< 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

– 16 –
SRF-PSY03
Sony Corporation
Personal A&V Products Company
9-926-998-11
99D057020-1
Printed in Singapore © 1999. 4
Published by Quality Engineering Dept.
(Shinagawa)