Sony LX50 - Manual (Page 38)

SLV-LX40/LX50/LX60S/LX70S
4-7 4-8
MA-405 (REC/PB HEAD AMP) SCHEMATIC DIAGRAM
– Ref. No: MA-405 board; 1000 series –
• See page 4-21 for waveforms.
A
1 2 3 4 5 6 7 8 9 10 11 12 13 14
B
C
D
E
F
MA-405 BOARD(1/7)
REC/PB HEAD AMP(RP BLOCK)
XX MARK:NO MOUNT
NO MARK:REC/PB MODE
R :REC MODE
P :PB MODE
REC/PB HEAD AMP
MA-405(1/7)
JL263
0.1u B
C272
JL279
AN_GND
JL284
JL277
XX
C268
JL287
0.01u B
C271
IC260 LA70011
123456789
1 0
1 1
1 2 13
14
15
16
17
18
19
20
21
22
23
24
10V 100u
C280
0
R267
22k
R279
RS2
0.022u
C278
B
JL273
VS3
22k
R277
AU2
AU3
JL260
100uH L270
JL269
JL271
470
R271
JL270
JL286 VS7
0.01u
B C282
VA4
0.1u B
C276
0.1u B C279
AU_PB_RF
VS6
AU1
0.60mm R273
JL267
0.1u
B
C267
JL262
VA5
SW_5V
JL282
470 R270
JL261
0.22u B
C284
JL266
JL278
6800
R276
22k
R278
3900 R274
JL265
JL281
4P CN270
HF ADJ 1
PB RF 2
RF SWP 3
AN_GND 4
0.01u B C281
JL280
JL272
} 0.5%
1800 R272
AN_GND
JL268
VA7
VA1
VA2
RS1
JL264
0.01u
C285
VA3
0.01u
B
C275
100p
CH
C286
JL274
0.01u
B
C283
CN260
11P
AUDIO CH2 L 1
AUDIO REC 2
AUDIO CH1 H 3
FE 4
AN_GND 5
SP CH1 F 6
SP CH2 S 7
SP CH2 F 8
EP CH1 F 9
EP CH2 S 10
EP CH2 F 11
AN_GND
1
3
4
2
EP CH2
AUDIO CH1
7
SP CH1
AUDIO CH2
9
10
EP CH1
5
11
SP CH2
6
8
MA-405 (7/7)
(SEE PAGE 4-19)
REC CURR ADJ
REC H
REC C
REC Y RF
PB RF
COMP SYNC
TRICK H
MA-405 (3/7)
(SEE PAGE 4-11)
RF ENV
RF SWP
HA SWP
ENV SW
AUDIO CH2
AUDIO REC
AUDIO CH1
AMP H.SYNC
AMP
DET
H
AT
T
VCC
SW30 AMP
PB OFF
BIAS
SP
ALL 5V
CONT SP OFF
10k
PB ON
COMP
AMP
REC
AGC
EP OFF
CURRENT
AGC
VCC
CURRENT
1k
ENVELOPE
VCC L
HA
TO HA
REC OFF
SW30
H.SYNC
AMP
AMP
EP
HA
VCC
EP OFF
PB OFF
DET
SP OFF
REC
10k
BIAS
MA-405 (2/7)
(SEE PAGE 4-9)
MA-405 (4/7)
(SEE PAGE 4-13)
LX60S/LX70S
IC260
VIDEO REC/PB AMP
CHECK
VIDEO HEAD
VIDEO SIGNAL
CHROMA Y Y/CHROMA
AUDIO
SIGNAL
REC
PB
SIGNAL PATH
4.9
R4.2/
P4.9
R1.4/P0
R3.9/
P2.0
R3.8/
P2.0
R2.5/
P0
R3.9/P2.0
R1.6/P2.0
R1.6/P2.0
R2.5/
P0
R1.6/P2.0
R3.2/
P2.5
R4.1/
P0
R3.4/
P0.4
R3.4/
P0
R0/P1.6
R0/P2.6
0.3
1.8
0
R0.2/P0.5
R2.0/P4.2
1
2
3
4
1 2
3
5 4
6
B+
B+
B+
VIDEO, AUDIO,
SERVO/SYSTEM CONTROL,
TUNER, POWER SUPPLY
FJ-32 (LINE 2 IN)
DI-80 (DIAL TIMER)
(POWER, EJECT SWITCH)
MA-405
( )