Sony RMT-V259M, Service Manual

Page: 57 / 117

SL
V
-SE850/SF900/SF950/SF990
4-5
4-6
REC/PB HEAD AMP
MA-388 (1/8)
For sc
hematic diagram
•
Ref
er to page 4-21 f
or pr
inted wir
ing board.
•
Ref
er to page 4-3 f
or w
a
v
e
fo
rm
s
.
4-2.
PRINTED
WIRING BO
ARDS AND SCHEMA
TIC DIA
GRAMS
2200 R272
RFSWP
0.01u
B
C271
PBRF
0.01u
B
C282
100uH
L270
0
R273
470
R270
RECH
0.01u
B
C281
5P
CN262
1
PB RF
2
RF SWP
3
GND
4C
T
L
5
A
V ADJ
XX
C270
5600 R274
XX
C273
RECC
0.01u
B
C283
XX
C274
RECYRF
10k
R276
0.1u
B
C276
CSYNC
47k
R275
470
R271
TRICKH ANGND
22k
R277
0.01u
B
C275
LP
22k
R278
0.1u
B
C279
RFENV SW5V
22k
R279
XX
C277
10V
100u
C280
COMPOUT
0.01u
B
C285
PDTC144EK-115
Q270
IC260
LA70016
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
HASW
0.1u
B
C272
RECCURADJ
0.22u
B
C284
CTLCHK
0
R280
JL260 JL261 JL263 JL262 JL265 JL264 JL266
JL267 JL268 JL269 JL270 JL271
0.022u
C278
B
2PD601AR-115
Q271
2700
R283
XX
R284
1k
R285
XX
C286
XX
C287
100p
CH
C288
JL272
AUDIOREC AUDIOCH2 AUDIOCH1
330
R286
4.7uH
L271
27p
C289
11P
CN260
1 2 3 4 5 6 7 8 9
10 11
JL273
A
V
ADJUST
JL274 JL275 JL276
1
A
AUDIO REC SP CH1.2 S
LP CH2 F SP CH2 F
FE
SP CH1 F
LP CH1.2 S
LP CH2
AUDIO CH1
SP CH2
GND(SW)
AUDIO CH2
AUDIO CH2 L
SP CH1
LP CH1 F
AUDIO CH1 H
LP CH1
EP OFF
CURRENT
BIAS
PB OFF
1k
SP
DET
ENVELOPE
ALL 5V
SP OFF
VCC
CONT
REC L
SP OFF
10k
HA
10k
BIAS
AMP
TO HA
PB ON
H.SYNC
REC OFF
COMP
AMP
SW30
AMP
DET
H.SYNC
REC
H
AMP
AGC
ATT
AMP
EP OFF
VCC
EP
CURRENT
SW30
HA
AGC
AMP
VCC VCC
PB OFF
1 6 4 3 8 5
11
9 7
10
2
DRUM VIDEO HEAD
BUFFER
TO(2/8)
PB
Y
XX MARK:NO MOUNT
SIGNAL P
A
T
H
CHROMA
IC260
AUDIO
B+
Y/CHROMA
16
NO MARK:REC/PB MODE R :REC MODE P :PB MODE
1
REC/PB HEAD AMP (RP BLOCK)
REC
SIGNAL
VIDEO REC/PB AMP
-REF
.NO.:1000 SERIES-
MA-388 BOARD(1/8)
VIDEO SIGNAL
B
4
E
10
12
9
D
11
C
7
3
26
5
F
8
G
2
TO(4/8)
19
TO(8/8) TO(6/8)
3
FOR CHECK
B+
5.0
R4.1/
P5.0
R1.5/P0
R4.0/
P2.0
R4.0/
P2.0
R2.5/
P0
R4.0/
P2.0
R1.4/
P2.0
R1.4/
P2.0
R2.5/
P0
R1.4/
P2.0
R2.8/ P2.5 R4.3/ P0 R3.4/ P0 R3.4/ P0 R0/ P1.7
R0/ P2.5
R0/ P0.5 0.3 1.9 0 4.4
R0/P2.4
0
R0/ P1.7
5.0
R0/ P1.1
5
4
3
2
1
B+