Technics SC-EH760 Service Manual page 39

E
D
F
C O N M R
R725
2.2K
C203 R209
25V4.7 1K
R237 R220
22
A
B
Q107
DTA143EUT106
R/P SELECT
9.6V
(0.2V)
4.7K
9.6V
4.7K
0V
(9.5V)
C204 R210
25V4.7
R216 C214
12K 25V4.7
B
PLAYBACK
GAIN ADJ.
(DECK1/Lch)
A
PLAYBACK
GAIN ADJ.
(DECK1/Rch)
:POSITIVE VOLTAGE LINE
5V
C207
270P
R211
L201 10K
22
4.8V 9.6V
1 2 3
IC201
CXA1552M-T4
DOLBY B NR
ATT2
ATT2
C208
270P
16 15 14
4.8V
R212
1K L202 10K
DOLBY
Rch
0V 0V
1 2
PLAYBACK
GAIN ADJ.
(DECK2/Lch)
IC102
MC14066BFEL
DECK 1/2 SELECT
14 13
9.6V 9.6V
(0.1V)
PLAYBACK
GAIN ADJ.
(DECK2/Rch)
: PLAYBACK SIGNAL LINE
: RECORDING SIGNAL LINE
DOLBY
Lch
R221 C225
100 25V4.7
C205
50V1
C218
50V0.1
DOLBY
ON : 0V
4.7V 4.7V 4.6V 4.7V 0.4V 4.8V
4 5 6 7 8
ON/OFF
ATT1
SC DET
ATT3
ATT3
SC DET
ATT1
R/P
13 12 11 10 9
4.7V 1.2V 4.6V 4.7V 0.4V 4.8V
(0V)
C226
25V4.7
(0V)
(5V)
5V
5V
0V
4.7K
4.7K
5V 5V
Q202
Q201
DTA143EUT106
DTA143EUT106
ENC/DEC SELECT
DOLBY ON/OFF
B
A
(9.6V) (9.6V)
0V 0V 0.1V 0.1V
3 4 5 6 7
12 11 10 9 8
9.6V 0V 0V 0V 0V
(0.1V)
R139
47K
C B A
0V
4.7K
I
4.7K
J