Key Pwb Circuit Diagram - JVC LT-26DC1BH/AX Service Manual

KEY PWB CIRCUIT DIAGRAM

1
A
B
C
D
1
2 3
MAIN PWB(18/22)
JP681
JP2
6 5
7 4
3
2
TP7
1
12505WR-05P
RV3
SV060305E101N
KEY1
R3
OPEN-302/1005
R5
271/F/1005
S1
2
1
DHT-1106T
R7
471/1005
S3
2
1
DHT-1106T
R9
102/1005
S5
2
1
DHT-1106T
R11
272/1005
S7
2
1
DHT-1106T
ADC1 SW Setting Point
TV/AV TV/AV/OK 0V~1.15V
MENU/OK Menu 1.16V~2.15V
VOL- VOL - 2.16V~3.25V
VOL+ VOL + 3.26V 4.5V
ADC2 SW Setting Point
CH + 0V~1.15V
CH+
CH - 1.16V~2.15V
CH-
Not Used 2.16V~3.25V
STANDBY Power 3.26V 4.5V
2 3
(No.YA693<Rev.001>)2-89
4
TP5 TP10 KEY2
1
TP6 TP10 KEY1
1
TP10
1
RV4
SV060305E101N
KEY2
R4
OPEN-302/1005
R6
271/F/1005
TV/AV
3
4
R8
471/1005
MENU
3
4
R12
102/1005
VOL-
3
4
R13
272/1005
VOL+
3
4
Center Voltage Min Voltage Max Voltage
0.750802139 0.654329977 0.85828112
1.644444444 1.457331095 1.846939486
2.708982036 2.449990999 2.980406334
3.822516556 3.532878942 4.117521838
Center Voltage Min Voltage Max Voltage
0.750802139 0.654329977 0.85828112
1.644444444 1.457331095 1.846939486
2.708982036 2.449990999 2.980406334
3.822516556 3.532878942 4.117521838
4
2-90(No.YA693<Rev.001>)
5
CH+
S2
2 3
1 4
DHT-1106T
CH-
S4
2 3
1 4
DHT-1106T
STANDBY
S6
2 3
1 4
DHT-1106T
KEY PWB ASS'Y
HU-72200002
5
6
A
B
C
D
6
lt-32_42dx9_sub-03_0602_3/5_0.0