Sony KDL-32W600D Service Manual page 25

2023/11/28 13:25:38 (GMT+09:00)
3-2. NO POWER
3-2-2 : Switch unit troubleshooting flow
Switch Unit NOT FUNCTIONING
Check if Wire Harness
And Connector is
connected properly?
Yes
** Check 3.3V
in Pin2, CN1
(Switch Unit).
Is it 3.3V?
Yes
*Check Pin 1
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
8, CN9702 on
B board . Is it 3.3V?
Yes
NG
Change Switch Unit
No
*VOLTAGE LEVEL FOR EACH PRESSED BUTTON
(for switch unit only)
KEY Voltage
(average)
-
+
No Input
**see next page for probing point of B board
Voltage
range
0.000 0.00 – 0.2
1.05 1.00 – 1.13
2.420 2.26 – 2.58
25
SYS SET