Service manual

VL-H875T
VL-H890T
40
VL-A10U/UC/UA/UW/T/K
VL-AH30U/UC/T
ADD 43, 44, 45, 46
Signal waveform
ADD 3F, 40, 41, 42
(A) TL319
(B) TL319
25 AV REC-H
PB REC
SC305 SC305 Q307 SC305 SC305 SC305
IC 301 HEAD AMP-PROCESS
VCC
RECORDING AMPLIFIER CH-1
SC305 SC305 SC305 SC305
SC301 SC301
ROTALY ERASING HEAD VIDEO HEAD L (CH-2) VIDEO HEAD R (CH-1)
ROTALYTRANSFORMER
Q315
Q302
13 PB RF EVN.
24 H-SW-P 23 OVER-P
28 REC-Y
31 REC-C 16 AGC IN 19 PB Y FM
22
D.O. PULSE
SC305
34
REC RF
10
ROT ERASE
BUF
BUF
VGC
11
3
Q315
2
30
9
28
9
7
5
32
4
FF30
Y AMP
AGC
DOC
PLAYBACK AMPLIFIER CH-2
RECORDING AMPLIFIER CH-2
ERASING OSCILLATOR SWITCH
ERASING OSCILLATOR
PLAYBACK AMPLIFIER CH-1
24
27
13
a
1FE (S)
SC301
5L (S)
SC301
6L (F)
SC301
9R (S)
SC301
8R (F)
2FE (F)
18
23
14
17
4.9V
4.9V
(A),(B)
7-2. HEAD AMP BLOCK DIAGRAM