Sony SRF-M85 Service Manual ▷ View online
SRF-M85
9
9
SRF-M85
R104
C104
C105
C116
C117
C113
R110
R111
R113
R112
C115
C125
C120
D102
C119
L105
C107
R106
C118
R116
R117
C126
R107
C146
C111
R108
C110
R114
C130
C140
C139
C134
C135
C137
C141
C142
R206
JC201
C223
C224
R123
C
2
2
5
C
2
2
6
C
2
2
7
R
2
0
7
R
2
0
8
R
2
0
9
C228
D201
R
2
1
1
R
2
1
0
C218
C220
C215
R204
C214
C213
C212
R205
C216
C219
C217
C221
C209
C208
C147
C210
C211
R201
C201
C138
Q107
BPF101
C149
Q104
R121
R122
Q102
R120
C131
Q103
IC201
R202
C204
C319
R319
C321
R320
R
3
2
1
C322
C323
C
3
2
4
C
3
2
5
C
3
2
6
C
3
2
8
C
3
2
7
C
3
4
4
R
3
2
3
D305
C315
Q306
C337
R317
R311
R312
C338
C311
C320
C345
C314
R316
C306
R
3
2
8
R
3
2
9
R
3
3
0
R
3
3
5
R
3
3
6
R
3
3
7
R
3
3
8
R
3
3
9
R
3
4
0
R
3
4
1
C
3
3
6
R318
R
3
2
2
R
3
0
3
C307
Q303
R313
JC302
D304
R314
C309
D303
D302
D301
JC301
C302
R305
C305
C304
C
3
2
9
C
3
3
0
C
3
3
1
C
3
3
2
C
3
3
3
C
3
3
4
C
3
3
5
R342 R304
R331
R332
R333
R334
S304
S307
S301
R307
C301
C144
C145
C109
R115
C127
C316
C136
R310
C310
R309
Q304
Q305
R308
R301
C222
J201
R124
L103
CT101
R105
Q101
R103
D103
L102
IC101
R118
R119
S101
S309
S310
S305
S306
S308
S302
S303
IC302
L104
R315
LCD301
Q201
R306
S311
IC301
R
3
2
4
R
3
2
6
X301
TP
TP
C132
Q105
C122
C124
C114
D101
TP
C207
RV201
C202
C205
C143
R126
Q106
C318
C303
100k
2200p
2200p
10p
3p
0.01
10k
1M
100k
100k
470p
1
1000p
HVU300A
1
33nH
1
100
0.022
10
470
0.01
470
220p
0.01
470
0.01
0
0.1
0.01
0.01
0.47
1
470
4V
1
220p
220k
0
1
220
4V
47k
0
.0
4
7
0
.4
7
0
.0
4
7
4
.7
4
.7
4
.7
100p
L203
2.2
µH
L202
4.7
µH
L201
4.7
µH
1PS226
4
.7
k
4
.7
k
4.7
16V
0.22
1
10k
22
6.3V
2200p
2200p
100k
1
0.47
0.47
1
2.2
1
1000p
1
1
22k
0.22
2.2
35V
2SC3931
1000p
RT1P144M
22k
220
2SC3931
100
1000p
2SC4081
TA2179FNG
22k
0.22
47p
4.7k
100p
4.7k
1
k
0.47
0.1
1
0
6
.3
V
0
.1
0
.1
0
.1
0
.4
7
1
0
0
p
4
7
0
k
1SS367
1000p
2SC4081
1000p
4.7k
10k
1M
L301
47
µH
L302
0.47
µH
L303
2.2
µH
0.1
2.2
35V
35V
1
1
1
10k
1
1
k
1
k
1
k
1
k
1
k
1
k
1
k
1
k
1
k
1
0
k
0
.1
10k
1
k
4
7
0
k
0.01
2SB1689
220k
0
1SS355
0
22
6.3V
RB521S
RB521S
RB521S
0
1
220k
0.01
1
4
7
0
0
p
4
7
0
0
p
4
7
0
0
p
4
7
0
0
p
4
7
0
0
p
4
7
0
0
p
4
7
0
0
p
0
10k
1k
1k
1k
1k
100k
1
2200p
4700p
0.01
10k
0.01
0.047
470
4V
470
0.1
1k
2SC4081
2SC4081
470k
100k
0.1
47
100
2SK209-Y
100k
HVU300A
TB2141FNG
10k
L107
0.1
µH
470k
XC61CN1002NR
100k
2SB1689
1M
TC9349AFG-107
(S,D)
1
0
0
k
1
0
0
k
75KHz
0.01
RT1N440M
220p
1000p
4700p
SVC347S
47
4V
4V
20k/20k
4700p
4700p
100p
0
RT1P140M
10p
0.047F
5.5V
MEGA_BASS
BEEP
BAND1
BAND2
MONO/ST
POWER
MUTE
OSCIN
KS1
KS2
KS3
KR1
KR2
KR3
KR4
KR4
KS1
KS2
KR3
KR2
KR1
KS3
POWER
BEEP
BAND2
BAND1
MONO/ST
MEGA_BASS
VT
BAND1
BAND2
MONO/ST
VT
BAND1
BAND2
MONO/ST
BEEP
BEEP
OSCIN
MUTE
LPF
GND
VREF
OUTB(L)
OUTC
OUTA(R)
VCC
BASE
(L)INB
(R)INA
PWSW
PWMUTE
BSTSW
BSTNF
BSTOUT
PWINC
MONO/STSW
OUTPUTSW
AGCDET
AGCIN
PWGND
RFOUT
VREFIN
RFIN
IN
GND
OUT
LPF2a
LPF2b
IFOUT
IFREQ
STSW
OSCOUT
MODE1
MODE2
TV/FMOSC
AMOSC
RFVCC
AMRF IN
AM BYPASS
FMRF OUT
TVRF OUT
LOUT
ROUT
LPF1b
LPF1a
MPXIN
DETOUT
GND
IFPASS
FMIFPASS
AGC
VCC
FMAGC
RFGND
FMRF IN
TVRF IN
VT
GND
MUTE
MONO/ST
BAND1
BAND2
OSCIN
BEEP
+B
MEGA BASS
RF GND
POWER
XOUT
VDD
C1
C2
VDB
C3
C4
VLCD
VEE
VCPU
INIT1
INIT2
POW
ER2
TEST
COM
1
COM
2
COM3
COM4
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
HOLD
M
ONO/ST
BAND2
BAND1
POW
ER1
BEEP
INT
KR4
KR3
KR2
KR1
KS3
KS2
KS1
S15
XIN
GND
R-ON
VDET
DDCK
MUTE
DO2
GND
OSCIN
VPLL
HEADPHONE AMP
-1
-2
VOL
AM RF AMP
ANTENNA
AM FERRITE-ROD
AM
OSC
RF
FM
BAND SELECT
SWITCH
OSC
BUFFER
FM/AM RF AMP,
MIX,DET,OSC
DX
LOCAL
FM SENS
Q104,105
BAND SELECT SWITCH
DRY BATTERY
SIZE"AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
BAND
DISPLAY
START/
STOP
POWER
SPLIT/
RESET
MEGA BASS
ENTER
TUNE/
TIME SET
-
TUNE/
TIME SET
+
MODE
VOLTAGE
DETECT
OUT
IN
GND
GND
HOLD
ON
OFF
B+ SWITCH
SWITCHING
Q305,306
LOW-PASS
FILTER
LIQUID
CRYSTAL
DISPLAY
SYSTEM CONTROLLER
Q102,103
FM RF AMP
B+
SWITCH
M
EGA BASS
19
1
XRESET
(ANT IN)
(RF GND)
(VT)
1
11
11
1
4-1. SCHEMATIC DIAGRAM
•
See page 8 for Waveforms.
•
See page 12 for IC Block Diagrams.
•
See page 8 for IC Pin Function Description.
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
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
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
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
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