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Model
SRF-M85
Pages
16
Size
695.35 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srf-m85.pdf
Date

Sony SRF-M85 Service Manual ▷ View online

SRF-M85
10
10
SRF-M85
4-2. PRINTED  WIRING  BOARD  – MAIN Board –
 :Uses unleaded solder.
Q105
B C E
Q103
B C E
Q102
BC
E
R121
R119
R118
R107
R108
R104
R106
R124
R105
R210
R120
C210
C211
R201
VOL
-1
-2
C201
C205
C202
C142
C141
C126
C127
C125
C213
C219
C217
C212
C215
C220
C130
C145
C144
C204
R202
R116
R117
R114
R123
R115
R205
R204
C143
C140
C139
C135
C133
C147
C109
C111
C107
C115
C114
C119
C122
R112
R113
R126
R211
R110
R111
R207
R208
R206
C118
C124
C120
C116
C117
C113
C222
C225
C223
C226
C209
C216
C221
R209
C227
C208
C149
R103
C228
C105
C104
C146
C110
C132
C131
C134
R122
D103
D102
E C B
Q104
L107
D G S
Q101
D201
D101
Q107
BC
E
L105
L201
L203
L202
EC
B
Q106
EC
B
Q201
JC201
IC101
IC201
C218
C214
C224
C137
C138
+
C136
C207
L104
CT101
L102
J201
S101
LOCAL t DX
RV201
1-865-007-
(11)
11
+
+
+
+
+
+
15
1
1
3
16
30
12
1
BLK
13
24
BPF101
TP
(RF GND)
TP
(ANT IN)
K
K
A
A
A
K
A/K
A
A
K
FM SENS
1
11
B
KEY
BOARD
i
A
KEY
BOARD
TP
(VT)
MAIN BOARD   
(COMPONENT SIDE)
1-865-007-
(11)
11
MAIN BOARD   
(CONDUCTOR SIDE)
NATURAL
RED
BLK
L3
AM FERRITE-ROD
ANTENNA
A
B
C
D
E
F
1
2
3
4
5
6
7
8
9
10
11
12
Semiconductor
Location
Ref. No. Location
D101
E-9
D102
D-9
D103
D-11
D201
D-11
IC101
C-9
IC201
D-8
Q101
D-10
Q102
C-11
Q103
D-11
Q104
B-11
Q105
B-11
Q106
E-10
Q107
C-8
Q201
E-8
(Page 11)
(Page 11)
SRF-M85
11
11
SRF-M85
4-3. PRINTED  WIRING  BOARD  – KEY Board –
 :Uses unleaded solder.
DISPLAY
MEGA BASS
IC302
IC301
R307
C305
C301
C302
R431
C307
C318
C320
C319
C324
C328
R304
R306
C304
R305
R303
R322
D301
D302
D303
R328
R342
R335
R319
R301
R336
C336
R337
R338
R339
R340
EC
B
Q304
EC
B
Q303
L303
C344
C326
C309
C311
C327
C322
C323
C325
C338
R314
R343
C310
C345
R310
R321
D304
L301
D305
JC301
X301
S308
SPLIT/
RESET
S307
TUNE/
TIME SET
START/
STOP
S305
S306
POWER
C303
+
+
S311
HOLD
ON
OFF
KEY BOARD   
(CONDUCTOR SIDE)
1-865-008-
(11)
11
1
BLK
BLK
RED
11
B
MAIN
BOARD
MAIN
BOARD
A
DRY BATTERY
SIZE “AAA”
(IEC DESIGNATION R03)
1PC. 1.5V
+
A
K
A
K
A A
A
K
K
K
1
2
4
3
1
16
48
33
32
17
49
64
S301
ENTER
S303
MODE
S310
BAND
S531
S302
S304
1
19
LCD301
LIQUID CRYSTAL
DISPLAY
A
B
C
D
E
F
1
2
3
4
5
6
7
8
9
10
11
KEY BOARD
1-865-008-
(11)
11
(COMPONENT SIDE)
R324
R326
R331
R334
C335
R333
C334
C332
C333
C329
C330
C331
R332
R329
R323
R320
C321
R308
R309
R311
C306
C315
C314
C316
C337
R317
R316
R330
R315
R318
R312
R313
L302
JC302
EC
B
Q305
EC
B
Q306
Semiconductor
Location
Ref. No. Location
D301
C-8
D302
C-8
D303
C-8
D304
E-10
D305
E-10
IC301
D-9
IC302
C-7
Q303
C-8
Q304
E-11
Q305
E-4
Q306
E-5
(Page 10)
(Page 10)
SRF-M85
12
12
SRF-M85
IC101
TB2141FNG (O, EL)
IC Block Diagrams
– MAIN Board –
IC201
TA2179FNG (EL)
22
MODE1
1
TV RF IN
16
LPF2A
17
LPF2B
18
IF OUT
19
IF REQ
20
ST SW
2
FM RF IN
1st MIX
I-MIXER
TV RF
AMP
FM RF
AMP
FM IF
AMP
FM IF
FILTER
LEVEL
DETECT
LPF
FM DET
PHASE
SHIFT
PHASE
COMPARATOR
FREQENCY
VCO
Q-MIXER
10
DET-OUT
9
GND
8
AM-IF PASS
7
FM-IF PASS
13
LPF1B
12
LPF1A
5
VCC
4
FM AGC
3
RF GND
6
AGC
11
MPX-IN
15
L-OUT
PHASE
SHIFT
2nd MIX
I-MIXER
AM RF
AMP
AM IF
AMP
IF
BUFFER
AM IF
FILTER
AM DET
PHASE
SHIFT
Q-MIXER
PHASE
SHIFT
MONO/STEREO
CONTROL
23
MODE2
24
TV-FM OSC
27
AM RF-IN
28
AM BYPASS
26
RF VCC
MODE
CONTROL
TV/FM
OSC
25
AM OSC
29
FM RF-OUT
30
TV RF-OUT
AM
OSC
1/2
OSC
BUFFER
STEREO
DECODER
BAND PASS
FILTER
LPF
14
R-OUT
LPF
AGC
21
OSC OUT
1/4
1/2
FM: 1/8
TV: 1/4
1
INA
2
INB
3
VREF
4
PW SW
8
LPF
7
GND
12
MONO/ST SW
11
PW INC
10
BST OUT
9
BST NF
24
RF IN
23
VREF IN
RF & REF
22
RF OUT
13
OUTPUT SW
21
BASE
20
VCC
19
OUTA
14
AGC DET
+
PWA
16
OUTB
15
AGC IN
+
PWB
18
OUTC
17
PW GND
PWC
AGC DET
MODE SW
+
BST
5
PW MUTE
6
BST SW
PW SW, PW MUTE, BST SW
13
SRF-M85
SECTION  5
EXPLODED  VIEW
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
2-583-549-01 KNOB (HOLD)
2
2-583-560-01 SWITCH (TUNE), RUBBER KEY
3
2-583-551-01 LEVER
4
A-1095-834-A CABINET (FRONT) ASSY
5
A-1095-836-A MAIN BOARD, COMPLETE
6
2-583-553-01 HOLDER (ANT)
7
X-2055-983-1 CABINET (REAR) ASSY
8
2-583-554-01 HOLDER (JACK)
9
2-589-019-01 SHEET (MAIN), COPPER LEAF
* 10
3-378-515-11 BUSHING
11
2-583-559-01 SWITCH (POWER), RUBBER KEY
12
2-583-545-01 PANEL (POWER)
13
2-583-581-01 SPRING, RING
14
3-236-793-11 O RING (VOL)
15
2-583-548-01 KNOB (VOL)
16
2-583-555-01 CLIP (A)
17
2-583-556-01 CLIP (B)
18
3-252-825-01 SCREW (1.7)
19
3-254-139-01 SCREW (1.7)
20
2-583-550-01 KNOB (SENS)
21
2-583-578-01 TERMINAL (–), BATTERY
22
2-583-547-01 LID, BATTERY CASE
23
2-583-562-01 TERMINAL (+), BATTERY
24
3-559-407-21 CUSHION, STOPPER
25
2-583-582-01 SHEET, COPPER LEAF
26
2-583-552-01 HOLDER (LCD)
27
1-780-212-11 CONDUCTIVE BOARD, CONNECTION
28
2-590-483-01 SHEET, HOLDER LCD
29
2-583-561-01 CASE (LCD)
30
A-1095-885-A KEY BOARD, COMPLETE
31
A-1095-535-A HOLDER ASSY, BELT
L103
1-428-925-12 COIL, FERRITE-ROD ANTENNA (AM)
LCD301 1-805-782-11 DISPLAY PANEL, LIQUID CRYSTAL
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 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
2
4
5
6
9
10
11
7
3
20
24
19
21
13
14
15
16
17
18
12
8
18
3
1
not
supplied
LCD301
L103
KEY board
not supplied
MAIN
board
27
26
28
29
25
30
24
18
23
22
31
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