Sony LX40 Service Manual page 38

MA-405 (REC/PB HEAD AMP) SCHEMATIC DIAGRAM
– Ref. No: MA-405 board; 1000 series –
• See page 4-21 for waveforms.
1 2 3
MA-405 BOARD(1/7) NO MARK:REC/PB MODE
R :REC MODE
REC/PB HEAD AMP(RP BLOCK)
P :PB MODE
A
XX MARK:NO MOUNT
EP CH2
B
EP CH1
SP CH2
11
10
C
9
SP CH1 8
7
6
5
4
3
D 2
1
AUDIO CH1
AUDIO CH2
E
LX60S/LX70S
VIDEO HEAD
F
SIGNAL PATH
VIDEO SIGNAL
CHROMA Y Y/CHROMA
REC
PB
4 5 6
6
CN260
11P
EP CH2 F
11
JL260
EP CH2 S
10
JL261
EP CH1 F
9
JL264
SP CH2 F
8
JL265
SP CH2 S
7
JL263
SP CH1 F
6
JL262
AN_GND
5
JL266
FE
4
JL267
AUDIO CH1 H
3
JL268
AUDIO REC 2
JL269
AUDIO CH2 L
1
JL270
AUDIO
SIGNAL
4-7
7 8 9
IC260
B+
VIDEO REC/PB AMP
3
L270
C280
100uH
R273
R3.2/
100u
10V 4.9 P2.5
ALL 5V
C283
R4.2/ R4.1/
R272 0.01u
R274
1800 P4.9 P0
B
C281
}0.5%
C279 R3.4/ 0.01u B
R1.4/P0
0.1u B
P0.4
C278
R3.9/ C282 B
R3.4/
0.022u
P2.0 P0 0.01u
B
R271 C276
0.1u R3.8/
470
R0/P1.6
B P2.0
C275 R2.5/
R0/P2.6
0.01u P0
B
R277
R3.9/P2.0 22k
0.3
R1.6/P2.0
1.8
R278
R1.6/P2.0
22k
0
R270 C272
R279
R2.5/
0.1u
470 R0.2/P0.5
22k
P0
B
SW30
C271
R1.6/P2.0 R2.0/P4.2
0.01u
B VCC
H L
C267
C268
0.1u
IC260 LA70011 XX
B
AN_GND
1
(POWER, EJECT SWITCH)
FJ-32 (LINE 2 IN)
SLV-LX40/LX50/LX60S/LX70S
10 11 12
JL271
JL272
4
5
C285 JL273
0.01u
JL274
B+
JL277
JL278
0.60mm
JL279
3900
JL280
R267
JL281
0
JL282
R276
6800
C284
0.22u B
JL284
JL286
JL287
C286 B+
100p
CH
2
MA-405
( VIDEO, AUDIO,
SERVO/SYSTEM CONTROL,
TUNER, POWER SUPPLY
DI-80 (DIAL TIMER)
4-8
13 14
CN270
4P
1 HF ADJ
2 PB RF CHECK
3 RF SWP
4 AN_GND
VA1 REC CURR ADJ
1
VA2 REC H
VA3
REC C
MA-405 (2/7)
(SEE PAGE 4-9)
VA4 REC Y RF
VA5 PB RF
VS3
COMP SYNC
VA7 TRICK H
RS1
RF ENV
2
VS6 RF SWP
VS7 HA SWP
MA-405 (3/7)
(SEE PAGE 4-11)
RS2
ENV SW
3
SW_5V
MA-405 (7/7)
AN_GND
(SEE PAGE 4-19)
AU1 AUDIO CH2
4
AU2 AUDIO REC
AU3 AUDIO CH1
MA-405 (4/7)
AN_GND
(SEE PAGE 4-13)
AU_PB_RF
)
REC/PB HEAD AMP
MA-405(1/7)