SRF-M95 - Sony Audio Service Manual (repair manual)

Model
SRF-M95
Pages
15
Size
1.12 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srf-m95.pdf
Date

View Sony SRF-M95 Service Manual online

SRF-M95
AEP Model
Chinese Model
E Model
Australian Model
Tourist Model
SERVICE MANUAL
FM STEREO/AM PLL SYNTHESIZED RADIO
SPECIFICATIONS
Ver 1.2  2002. 05
Time display: 24-hour system
Frequency range:
Band
Frequency range
Channel step
FM
Panama model :
Except Panama, Tourist model :
87.5 - 108 MHz
0.1 MHz
AM
530 -1 710 kHz
10 kHz
FM
87.5 - 108 MHz
0.05 MHz
AM
531 -1 602 kHz
9 kHz
Tourist model :
FM
76.0 - 108 MHz
0.05 MHz
AM
531 -1 710 kHz
9 kHz
Output: 2 (headphones) jack (
∅ 3.5 mm, stereo
minijack)
Power output: 2.5 mW + 2.5  mW (at 10 % harmonic
distortion)
Power requirements: 1.5 V DC, one R03 (size AAA)
battery
Auto Power off function: Approx. 30 minutes, 60
minutes, 90minutes, 120 minutes, and off
Dimensions: Approx.  39 
× 83.8 × 20.4 mm (w/h/d)
(Approx. 1
 9
/
16
 
× 3 
3
/
× 
13
/
16
 inches) incl.
projecting parts and controls
Mass: Approx. 57.5 g (2 oz.) incl. battery and the
Accessories supplied
Stereo headphones (1)
headphones
Design and specifications are subject to change
without notice.
Battery Life (Approx. hours)
When using
FM
AM
Sony alkaline LR03(size AAA) 40
54
Sony R03(size AAA)
18
26
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-873-067-13
2002E1600-1
© 2002.05
2
SRF-M95
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.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SECTION 1
GENERAL
This section is extracted
from instruction manual.
Setting the Clock
The time display of this clock is a 24-hour system.
1
Press POWER to turn off the power.
2
Press and hold down the jog lever for
more than 2 seconds until “0”starts
flashing.
3
Slide or keep sliding the jog lever up or
down to adjust the hour and press the
jog lever.
If you keep sliding the jog lever up or down,
the number changes rapidly.
0:00=midnight, 12:00=noon.
4
Slide the jog lever up or down to adjust
the minutes and press the jog lever.
“:” starts flashing and the clock starts
operating.
To set the current time exactly to the second,
adjust the minute and then press the jog lever
in time with a time signal (such as the
telephone time signal).
To cancel the setting, press MODE.
Note
Once you start setting the clock, you must perform each
step within 60 seconds, or  the clock setting mode will be
cancelled.
POWER
Jog Lever
(selection/decision)
Molette (sélection/décision)
Palanca de lanzadera
(selección/decisión)
MODE
HOLD
MEGA BASS
Display Window
Afficheur
Visualizador
2
VOL
Front
Face avant
Parte frontal
3
SRF-M95
SECTION 2
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
2-1. MAIN BOARD, SUB BOARD
1
 Screw (1.4  
× 
10)
1
 Screw (1.4  
× 
10)
9
 SUB board
7
 Cover (Jack)
1
 Screw (1.4  
× 
10)
5
 Flexible board
4
 Screw 
6
 MAIN board
3
 Cabinet (front) assy
2
 Six claws
8
 Screw
4
SRF-M95
SECTION  3
ADJUSTMENTS
Setting:
BAND switch: AM
Connection:
For AM frequency coverage adjustment and FM frequency coverage check.
AM Section
digital
voltmeter
TP (VT)
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
headphone jack (
i
)
16 
+
FM Section
FM RF signal
generator
22.5 kHz frequency deviation 
by 400 Hz signal.
Output level: as low as possible
0.01 
µ
F
TP (ANT)
FM VCO Adjustment
Setting:
BAND switch:
FM
FM SENS switch: DX
Procedure:
1.
Turn off the FM RF signal generator.
2.
Put a capacitor (100 
µF) between pin ws (IC201) and GND.
3.
Put a resistor (100 k
Ω) between TP (VCO) and GND.
4.
Tune the set to 87.5 MHz.
5.
Adjust RV201 for 19 kHz 
± 0.05kHz reading on the frequency
counter.
AM FREQUENCY  COVERAGE  ADJUSTMENT
Adjust for a reading on digital voltmeter.
 T201
531 kHz (530 kHz) [531 kHz]
1.3V 
± 0.1V
  Confirm
1,602 kHz (1,710 kHz) [1,710 kHz]
10 V or less
AM  TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
CT201
1485 kHZ (1480 kHz)
L201
585 kHz (590 kHz)
FM FREQUENCY  COVERAGE  CHECK
Check a reading on digital voltmeter.
  Confirm
87.5 MHz [76.0 MHz]
3.5V [0.9 V] or more
  Confirm
108.0 MHz
11V or less
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
CT101, CT102
108.0 MHZ
L104
87.5 MHz [76.0 MHz]
(     ) : Panama model   [     ] : Tourist model
Connection:
frequency counter
TP (VCO)
Setting:
BAND switch:
FM
FM SENS switch: DX
Connection:
Adjustment Location
[MAIN BOARD]
(SIDE B)
[MAIN BOARD]
(SIDE A)
IC401
CN401
IC201
GND
TP(VCO)
GND
GND
TP(ANT)
TP(VT)
TP(pin 
ws
)
IC101
CT101
CT102
CT201
L201
L104
FM TRACKING
Adjustment
AM TRACKING
Adjustment
T201
AM FREQUENCY 
COVERAGE Adjustment
RV201
FM VCO
Adjustment
5
5
SRF-M95
SECTION  4
DIAGRAMS
4-1. BLOCK DIAGRAM
FM/AM RF,IF AMP
IC201
T202
AM MIX
CF202
450kHz
MIX OUT
4
FM IF IN
3
AM IF IN
6
AM OSC
L OUT 14
R OUT 15
ON
OFF
: FM
• Signal Path
• RCH is omitted
: AM
RF IN
1
6
MIX
8
RF OUT
5
OSC
FM FRONT END
IC101
D101
FM IF
AMP
Q102
CF101,102
10.7MHz
L201
BAR ANT
AM RF
24
Q201
RF
AMP
T201
AM OSC
2
D201
7
QUAD
17
VCO
VCO
RV201
CF203
10.7MHz
AUDIO
POWER AMP
IC301
40
DO
TU VCC
Q101
LOCAL
/DX
EXCEPT
JE
MODEL
D102
Q103
TU VCC
LPF1
16
Q204
LOCAL
/DX
JE MODEL
FM 
DX
LOCAL
OFF
ON
TU VCC
L.P.F
Q403
CT201
DET OUT
22
PILOT IN
21
MPX IN
20
Q205
LPF 2A
18
LPF 2B
19
Q203
BAND
TU VCC
TU VCC
Q202
TU VCC
Q303
S304
Q302(1/2)
IN L
27
Q302(2/2)
IN R
28
S305
MEGA
BASS
VOL
RV301
TU VCC
NF L
26
NF R
29
REF OUT
3
BST SW
43
PW SW
42
MT SW
41
Q301
TU VCC
VCC
BASE
18
OUT L 22
OUT C 21
OUT R 20
AGC IN 35
J301
TU VCC
Q104,105
IC101
+B
DC-DC
CONV
T401
Q402,405
VCC
Q401
38
OSC IN
31
DDC ON
52
BAND
53
AM PON
50
MUTE
28
BEEP
X OUT
55
LCD1
LIQUID CRYSTAL
DISPLAY
X IN
56
X401
75kHz
1
4
COM1 COM4
5
16
S1 S12
INT2
34
VDD
IF
COUNTER
1
2
INT1
35
IF INT2
36
VCC
IC402
HOLD SW
26
HOLD
S303
KR1
23
DIGITAL TUNING 
SYSTEM CONTROL
IC401
POWER
KR2
24
KR3
25
KS1
21
KS2
-2
S401
MODE
S302
-1
-3
22
S301
JOG
DRY BATTRY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC 1.5V
Q406
VDD
IC403
VCC
RESET
RESET 54
POWER ON 51
                   • Abbreviation
JE
: Tourist model.
Ver 1.1  2002. 02
6
6
SRF-M95
4-2. SCHEMATIC  DIAGRAM –MAIN SECTION–
• See page 10 for IC Pin Function.     • See page 10 for IC Block Diagrams.
1
 IC101 
tg
 XOUT
960 mVp-p
14 
µ
sec
TIME/div  : 10 
µ
sec/div
VOLT/div : 200 mV/div
2
 
2.1 Vp-p
0.34 
µ
sec
TIME/div  : 0.1 
µ
sec/div
VOLT/div : 500 mV/div
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
C
: panel designation.
A
: B+ Line.
H
: adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
<
> : AM
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
Signal path.
F
: FM
f
: AM
• Abbreviation
JE
: Tourist model.
PA
: Panama model.
• Waveform
L104
EXCEPT JE
IC B/D
IC B/D
2
Ver 1.1  2002. 02
7
7
SRF-M95
4-3. PRINTED  WIRING  BOARDS –MAIN SECTION–
R415
MAIN BOARD
    
(SIDE B)
MAIN BOARD
    
(SIDE A)
1-679-614-
11
(11)
1-679-614-
11
(11)
L201
AM FERRITE-ROD ANTENNA
1
1
12
13
24
1
1
16
17
32
33
48
49
64
3
2
18
A
TO
SUB BOARD
S401
POWER
JE
MODEL
JE
MODEL
JE,PA
MODEL
PA
MODEL
EXCEPT PA MODEL
EXCEPT JE,PA MODEL
EXCEPT JE
MODEL
1
4
5
8
LCD1
(LIQUID CRYSTAL DISPLAY)
1
1
2
3
4
16
R207
R206
R428
R209
R210
R205
R204
C207
L202
R407
R409
R405
R415
R426
R418
R414
R413 R412
R411
R410 
R417
R425
R430
R421
R419
R422
R420
D401
R402
R403
R404
R406
R429
R408
L102
R109
R101
R108
D102
R107
R106
R105
D101
R104
R423
R401
R427
L103 R102
R103 R110
R112
R203
R208
R212
R201
R202
C203
X401
C425
C415
C417
C416
C414
C424
C428
C410
C411
C409
C418
C421
L401
C422
C423
Q403
C405 
TP (ANT)
TP (VT)
C219
C220
C209
TP (VCO)
Q204
C215
C213
C214
C212
TP (pin ws)
R412
C114
C107 C108
C110
C111
C112
Q103
C118
C113
C407
C103
C102
Q101
C104
C115
C105
C109
R113
C117
C106
Q102
C206
Q104
L106
C403
Q402
C401
C426
C402
Q401
Q405
C208
C223
C205
C204
Q203
C218
Q205
C224
C221
C201
C211
Q105
TP (OSC)
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
C427
1
2
A
B
C
D
E
F
G
H
3
4
5
6
7
8
9
10
11
IC401
IC403
IC402
IC201
IC101
Ref. No. Location
D101
D-7
D102
D-7
D201
G-8
D401
D-10
D402
D-10
IC101
E-8
IC201
G-3
IC401
B-3
IC402
A-8
IC403
C-4
Q101
E-8
Q102
E-8
Q103
D-8
Q104
F-8
Q105
E-8
Q201
H-7
Q202
H-7
Q203
H-9
Q204
H-2
Q205
H-8
Q401
E-9
Q402
D-9
Q403
D-3
Q405
E-10
Q406
E-9
• Semiconductor
Location
• Abbreviation
JE
: Tourist model.
PA
: Panama model.
Note on Printed Wiring Board:
• Y
: parts extracted from the conductor side.
b
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
 (Side A)
the parts face are indicated.
• Indication of transistor
Q
C
These are omitted
E
B
Ver 1.1  2002. 02
8
8
SRF-M95
4-4. SCHEMATIC  DIAGRAM –SUB SECTION–
• See page 10 for IC Block Diagrams.
IC B/D
ON
OFF
4
5
1
2
3
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F 50 WV or less
are not indicated except for electrolytics and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise specified.
C
: panel designation.
A
: B+ Line.
H
: adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power supply from
battery terminal.
• Voltages and waveforms are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
<
> : AM
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
• Circled numbers refer to waveforms.
Signal path.
F
: FM
f
: AM
• Abbreviation
FR
: French model.
Ver 1.1  2002. 02
9
9
SRF-M95
4-5. PRINTED  WIRING  BOARDS –SUB SECTION–
SUB BOARD
    
(SIDE B)
SUB BOARD
    
(SIDE A)
J301
1-679-615-
11
(11)
1-679-615-
11
(11)
 RV301
VOL
S303
DRY BATTERY
SIZE "AAA" 
(IEC DESIGNATION R03)
1PC 1.5V
13
12
1
1
18
48
37
36
25
24
A
TO
MAIN BOARD
BATT1
HOLD
OFF
LOCAL
DX
ON
OFF
S302
MODE
S304
FM
S305
MEGA
BASS
S301
JOG
HOLD
L304
R308
R309
R317
R316
D301
R310
R311
R314
R315
R306
R307
L307
L306
L305
R312
R313
L302
L303
L301
C314
R305
R304
R303
C306
C305
C304
C325
C324
C323
C308
C309
C302
C301
C311
C310
C312
C315
R318
C303
C320
C321
Q303
C318
E
E
1
2
A
B
C
D
E
F
G
H
3
4
5
6
7
8
9
10
11
IC 301
Ref. No. Location
D301
H-3
D302
B-8
D303
B-9
D304
B-8
D305
B-9
IC301
C-8
Q301
B-8
Q302
D-7
Q303
E-4
• Semiconductor
Location
Note on Printed Wiring Board:
• Y
: parts extracted from the conductor side.
b
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
 (Side A)
the parts face are indicated.
• Indication of transistor
Q
C
These are omitted
E
B
10
10
SRF-M95
4-6. IC BLOCK DIAGRAMS
– MAIN Board –
IC101   TA7371AF-EL
IC201   TA2022AFN-EL
– SUB Board –
IC301   TA2123AF(EL)
GND
AFC
RF IN
AFC
MIX OUT
VCC
OSC
FM RF
1
2
3
4
5
6
7
8
RF
REG
MIX
OSC
VREF
OSC
VCC
GND
IF OUT
IF REQ
SP OUT
1
2
FM IF IN
MIX
3
4
5
AM IF IN
QUAD
AGC
6
7
8
9
10
11
12
ROUT
LOUT
ST IND
13
14
15
MPX IN
PILOT IN
DET OUT
PW SW
AM RF 
20
21
22
23
24
LPF 
LPF 
18
19
LPF
VCO
16
17
STOP
PULSE
OSC
AGC
MIX
FM
IF
AF
AM
IF
AM
IF
FM DET
SWITCH
AM DET
DEVIDE
DECODE
PRE
VCO
0
90
FM
AM
PILOT
ST
IND
ø
ø
+
+
AGC
DET
BST
PWC
PWB
+
PWA
+
+
+
+
TOMP
RIPPLE
FILTER
MIX
MTL DRV
VREF
PREA
PREB
BEEP
SW
36 35
34
33
32 31
30
29
28 27 26
25
24
22
21
20
19
18
17
16
15
14
13
23
12
11
10
9
8
7
6
5
3
2
1
4
48
47
46
45
44
43
42
41
40
39
38
37
AGC DET
AGC IN
BST NF
BST OUT
IN-C
LPF
EQ R
NF-R
IN-R
IN-L
PW NF-L
EQ-L
RF IN
PW GND
OUT L
OUT C
OUT R
VCC
BASE
RF OUT
GND
AMS 
AMS 
AMS 
VREF IN
PRE GND
M/N SW
PRE SW
F/R SW
BST SW
PW SW
MT SW
AMS OUT
BEEP
MT TC
CAMP SW
AMS IN
NF
OUT
MTL
MTL
OUT
NF
IN
IN
REF OUT
 IN
 IN
4-5. IC PIN FUNCTION DESCRIPTION
• IC401
TC9329FA-104 (DIGITAL TUNING SYSTEM CONTROL)
Pin No.
1
2
3
4
5 to 16
17
18
19 to 20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42 to 45
46 to 49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
I/O
O
O
I
I
I
O
I
I
O
I
I
O
I
I
I
I
I
I
I
O
I
I
O
I
O
I
Pin Name
COM1
COM2
COM3
COM4
S1 to S12
SIMUKE1
SIMUKE2
P9-0 to P9-1
KS1
KS2
KR1
KR2
KR3
HOLD_SW
VDD
BEEP
DDCOM
TEST
INT2
INT1
IF IN2
GND
OSC IN
VDD
DD
V REG
P3-1 to P3-3
P5-0 to P5-3
MUTE
POWER_ON
BAND
AMP_ON
RESET
XOUT
XIN
GND
VDB
C1
C2
VEE
C3
C4
VLCD
Description
LCD common output
LCD segment output
Distination setting
Not used
Key source
Key return
HOLD SW input  L : ON  H : OFF
Power supply
BEEP output
Not used
Not used
DC-DC converter ON   L : ON   H : OFF
Not used
Test mode control input  L : NORMAL  H : TEST MODE
Battery removal detection  L : No battery power mark lights.
1.0V battery detection  L : No battery power mark lights.
IF input.
Ground terminal.
Programable counter input terminal.
Power supply.
Phase comparator output.
1.5 V constant voltage power supply output for phase comparator.
Not used
Not used
MUTE  L : ON  H : OFF
POWER ON  L : ON  H : OFF
BAND select  L : AM  H : FM
Audio amp SW  L : OFF  H : ON
0.9V voltage select  L : Microcomputer reset
Terminal to which external crystal oscillator is connected (75kHz)
Terminal to which external crystal oscillator is connected (75kHz)
Ground terminal
Power voltage step-up terminal
Constant voltage power supply output for LCD drive.
Constant voltage power supply output for LCD drive.
1.5V constant voltage power supply output for LCD drive.
Constant voltage power supply output for LCD drive.
Constant voltage power supply output for LCD drive.
3.0V constant voltage power supply output for LCD drive.

Download Sony SRF-M95 Service Manual (Repair Manual)

Here you can view online and download Sony SRF-M95 Service Manual in PDF. SRF-M95 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SRF-M95 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.