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MA-397 (REC/PB HEAD AMP) SCHEMATIC DIAGRAM
– Ref. No: MA-397 Board; 1000 series –
• See page 4-21 for waveforms
1
2
3
MA-397 BOARD(1/7)
NO MARK:REC/PB MODE
R :REC MODE
REC/PB HEAD AMP(RP BLOCK)
A
P :PB MODE
•REF.NO.:1000 SERIES-
XX MARK:NO MOUNT
EP CH2
B
EP CH1
SP CH2
11
10
C
9
SP CH1
8
7
6
5
4
3
AUDIO CH1 H
AUDIO REC
2
D
AUDIO CH2 L
1
AUDIO CH1
AUDIO CH2
E
F
G
MA-397
VIDEO, AUDIO,
(
SERVO/SYSTEM CONTROL,
H
TUNER, POWER SUPPLY
I
FJ-28 (LINE 2 IN)
DM-98 (USER CONTROL)
DI-81 (DIAL TIMER)
J
4
5
6
C280
100u
10V
6
C279
0.1u B
CN260
11P
EP CH2 F
11
JL260
EP CH2 S
10
JL261
R271
EP CH1 F
9
470
JL264
SP CH2 F
8
JL265
SP CH2 S
7
JL263
SP CH1 F
6
JL262
AN_GND
5
JL266
FE
4
JL267
3
JL268
2
R270
JL269
470
1
JL270
C271
0.01u
)
4-7
7
8
9
5
4
IC260
B+
VIDEO
3
REC/PB AMP
IC260
LA70011
L270
100uH
R3.2/
R273
0.60mm
P2.5
4.9
C283
ALL 5V
0.01u
R272
R4.1
R4.2/
B
1800
/P0
3900
P4.9
R274
R3.4/
}0.5%
R1.4/
P0.4
P0
C281
C278
R3.4/
R3.9/
0.022u
0.01u
P0
P2.0
B
B
C282
R3.8/
R276
0.01u
P2.0
6800
B
C276
R2.5
0.1u
/P0
B
R0/P1.6
C275
R3.9/
C284
0.01u B
R0/P2.6
P2.0
0.22u B
0.3
R277
R1.6/
1.8
P2.0
22k
R1.6/
R278
P2.0
0
22k
C272
R279
R2.5
0.1u
R0.2/P0.5
22k
B
/P0
SW30
R1.6/
B
R2.0/P4.2
P2.0
VCC
L
H
C267
C286
C268
0.1u
100p
XX
B
CH
2
10
11
12
JL271
1
JL272
2
C285
JL273
3
0.01u
JL274
4
B+
JL277
JL278
JL279
JL280
R267
JL281
0
JL282
1
JL284
JL286
JL287
B+
SIGNAL PATH
VIDEO SIGNAL
AUDIO
SIGNAL
CHROMA
Y
Y/CHROMA
REC
PB
4-8
SLV-LX80S
13
14
CN270
4P
HF ADJ
PB RF
CHECK
RF SWP
AN_GND
VA1
REC CURR ADJ
VA2
REC H
1
VA3
REC C
VA4
REC Y RF
MA-397(2/7)
(SEE PAGE 4-10)
VA5
PB RF
VS3
COMP SYNC
VA7
TRICK H
RS1
RF ENV
2
VS6
RF SWP
VS7
HA SWP
MA-397(3/7)
(SEE PAGE 4-11)
RS2
ENV SW
3
SW_5V
AN_GND
MA-397(7/7)
(SEE PAGE 4-19)
AU1
AUDIO CH2
4
AU2
AUDIO REC
AU3
AUDIO CH1
MA-397(4/7)
(SEE PAGE 4-13)
AN_GND
AU_PB_RF
REC/PB HEAD AMP
MA-397 (1/7)
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