Schematic Diagram - Key Board - Sony HCD-S20 Service Manual

6-17. SCHEMATIC DIAGRAM - KEY Board -

1
KEY BOARD
A
1 ADC_KEY1
1
2
2
3
ADC_KEY2
3
XP1 XP1
3PIN/2.0mm 3PIN/2.0mm
9 1
B
HCD-S20
2 3
ADC_KEY1
ESD11 ESD11 UP UP
NC/PESD5V0S1BA/30K/35pF NC/PESD5V0S1BA/30K/35pF
C56 C56
100pF/50V/NP0 100pF/50V/NP0
ENTER ENTER
DOWN DOWN
TUNE+ TUNE+
OPEN OPEN
4
SW1 SW1
ADC_KEY2
SW2 SW2
R1 R1 2.2K 2.2K
SW1:0V
SW3 SW3
R2 R2 6.8K/1% 6.8K/1%
SW2:0.6V
SW3:1.34V
SW4:2V
SW5:2.72V
SW4 SW4
R3 R3 15K/1% 15K/1%
SW9 SW9
R4 R4 47K/1% 47K/1%
33 33
5 6
SW6 SW6
TUNE- TUNE-
C57 C57
ESD12 ESD12
100pF/50V/NP0 100pF/50V/NP0
NC/PESD5V0S1BA/30K/35pF NC/PESD5V0S1BA/30K/35pF SW7 SW7
R7 R7
EQ EQ
SW8 SW8
CANCEL CANCEL
SW5 SW5
PLAY/PAUSE PLAY/PAUSE
SW10 SW10
FUNCTION FUNCTION
HCD-S20
7
2.2K 2.2K
R8 R8 6.8K/1% 6.8K/1%
R5 R5 15K/1% 15K/1%
R6 R6 47K/1% 47K/1%