Playback Signal Line - Technics RS-DV290EG Service Manual

: PLAYBACK SIGNAL LINE

E
D
F
C O N
R725
2.2K
5V
24
5V
23
(9.6V)
0.1V
22 A
(0.1V)
9.6V
21 B
20
Q107
19
DTA143EUT106
R/P SELECT
18
9.6V
(0.2V) (0.2V)
9.6V
9.6V
17
0V
16 (9.5V)
15
(0.2V)
5V
14
(5V)
0.2V
13
A
X
B
X
C
7
M R
C207
270P
C203 R209
25V4.7 1K L201
R237 R220
22 22
IC201
CXA1552M-T4
DOLBY B NR
C208
270P
C204 R210
25V4.7 1K L202
R216 C214
12K 25V4.7
B
PLAYBACK
GAIN ADJ.
(DECK1/Lch)
A
PLAYBACK
GAIN ADJ.
(DECK2/Lch)
PLAYBACK
GAIN ADJ.
(DECK1/Rch)
8
5V
R211
10K
4.8V 9.6V 4.7V
1 2 3
ATT2
ATT2
16 15 14
4.8V 4.7V
R212
10K
DOLBY
Rch
0V 0V 0V
1 2 3
IC102
MC14066BFEL
DECK 1/2 SELECT
14 13 12
9.6V 9.6V 9.6V
(0.1V) (0.1V)
PLAYBACK
GAIN ADJ.
(DECK2/Rch)
9 10
DOLBY
Lch
R221 C225
100 25V4.7
C205
50V1
C218
50V0.1
DOLBY
ON : 0V
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
1.2V 4.6V 4.7V 0.4V 4.8V
(0V)
C226
25V4.7
(0V)
(5V)
5V
5V
0V
5V 5V
Q202
Q201
DTA143EUT106
DTA143EUT106
R/P SELECT
DOLBY ON/OFF
B
A
(9.6V) (9.6V)
0V 0.1V 0.1V
4 5 6 7
11 10 9 8
0V 0V 0V 0V
RS-DV290(EG) MAIN CIRCUIT DIAGRAM
11
C B A
0V
I
J
12