Sony KDL-43W6 G Series Service Manual page 91

2019/01/30 02:46:26 (GMT+09:00)
7.1.2 Switch Unit Troubleshooting Flow
7.1.2 Switch Unit Troubleshooting Flow - General Checking
Switch Unit NOT FUNCTIONING
Check if Wire Harness
And Connector is
connected properly?
Yes
** Check 3.3V
in Pin3, CN1
(Switch Unit).
Is it 3.3V?
Yes
*Check Pin 2
Voltage Level in CN1
(switch unit).Is voltage
level according to key
pressed?
Yes
Change B-board
No
Change Wire Harness
And connect properly
**Check 3.3V in (Pin
No
9, CN9602 on
B board . Is it 3.3V?
Yes
NG
Change Switch Unit
No
*VOLTAGE LEVEL FOR EACH PRESSED BUTTON (for SV (all
model ) switch unit )
KEY Voltage
(average)
-
+
No Input
Pin 3
POWER KEY
Pin 2
TACT KEY
Pin 1
White wire(GND)
**see next page for probing point of B board
Voltage range
0.00 – 0.2
0.000
1.00 – 1.13
1.05
2.26 – 2.58
2.420
FRONT VIEW
BACK VIEW
91
SYS SET