Sony RMT-V259, Service Manual

Page: 46 / 93

SLV-SE350/SE500/SE600/SE650/SE700/SE800/SX600/SX700/SX800
MA-373 (HEAD AMP) SCHEMATIC DIAGRAM • See page 4-5 for printed wiring board.
– Ref. No.: MA-373 board; 1,000 series –
4-9 4-10
HEAD AMP
MA-373 (1/9)
*
R272
RF_SWP
0.01u
C271
PB_RF
0.01u
C282
ADJSW
100uH
L270
0 R273
*
R270
REC_H
0.01u
C281
5P CN262
1
2
3
4
5
*
R274
REC_C
0.01u
C283
REC_Y_RF
*
R276
0.1u
C276
COMP_SYNC
47k
R275
*
R271
TRICK_H
ANGND
22k
R277
0.01u
C275
SP
22k
R278
0.1u
C279
RF_ENV
SW5V
22k
R279
16V
100u
C280
COMP_OUT
0.01u
C285
PDTC144EK-115
Q270
IC260
1
TRICK_H
2
COMP_OUT
3
HA(EP/SP)
4
SW30
5
H_SYNC
6
ENVDET_OUT
7
PB_OUT
8
GND
9
REC_Y_IN
10
REC_C_IN
11
REC/MUTE/PB
12
REC_CURRENT_ADJ2
13
Vcc
14
REC_CURRENT
ADJ1
15
REC_AGC_FILT
16
SP_L_IN
17
REC_SP_OUT
18
PB FILT
19
SP_H_IN
20
GND
21
EP_L_IN
22
EP_OUT
23
PB FELT
24
EP_H_IN
HA_SWP
0.1u
C272
REC_CURR_ADJ
0.22u
C284
CTL_CHECK
2P CN263
1
2
AFENV
100k
R280
JL260
JL261
JL263
JL262
JL265
JL264
JL266
JL267
JL268
JL269
JL270
JL271
JL283
0.022u
C278
0
R283
0
R284
100p
C288
JL272
AUDIOREC
AUDIOCH2
AUDIOCH1
ANGND
100
R286
2.2uH
L271
18p
C289
11P CN260
1
2
3
4
5
6
7
8
9
10
11
JL273
CN261 6P
1
2
3
4
5
6
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
PB RF
RF SWP
GND
AV ADJ
CTL
GND
HF_ADJ
1
6
4
3
8
5
11
9
7
10
2
LP CH1 F
SP CH1.2 S
LP CH2 F
SP CH1 F
SP CH2 F
LP CH1.2 S
1
6
4
3
5
2
CHECK
CHECK
IC260
VIDEO REC/PB AMP
1
MA-373 BOARD (2/9)
(SEE PAGE 4-11)
(SEE PAGE 4-17)
MA-373 BOARD (4/9)
2
MA-373 BOARD (8/9)
3
(SEE PAGE 4-27)
4
(SEE PAGE 4-30)
MA-373 BOARD (9/9)
MA-373 BOARD (5/9)
5
(SEE PAGE 4-21)
SWITCH
8 7 10 5 6
F
13
05
C
D
MA-373 BOARD (1/9)
4 12 11
E
9 2
B
3
EXCEPT SE350/SE500
SE350/SE500
EXCEPT SE350/SE500
LA70001
LA70011 :SE350
:EXCEPT SE350
*R274
4.7k
5.6k :SE500
:EXCEPT SE500
470
560
*R271
:EXCEPT SE350/SE500
:SE350/SE500
:EXCEPT SE350/SE500
1.8k
*R272
:SE350
2.2k
2.7k
:SE500
8.2k
:SE500
:SE500
10k
15k :EXCEPT SE350/SE500
*R276
470
*R270
:SE350
:EXCEPT SE500
560
1
5
6
4 3
2
R:REC MODE
P:PB MODE
NO MARK:REC/PB MODE
*:IMPOSSIBLE TO MEASURE THE
VOLTAGE AT THE MARKED POINTS.
PB
Y/CHROMA
VIDEO SIGNAL
Y CHROMA
SIGNAL
AUDIO
REC
SIGNAL PATH
5
R4/P5
R1.6/P0
R3.9/P2
R3.9/P2
R2.5/P0
R3.9/P2
R1.2/P2
R1.2/P2
P2.5/
P0
R1.2/P2 4.3
R0.3/P0.6
0
1.4-2.2
0.3
R0/
P2.1
R3.5/P0
R0.1/
P1.7
R3.5/
P0.5
R4.3/
P0.1
R2.8/
P2.5
*
*
B+
B+
B+
B+
EXCEPT
SE350