Sony KLV-32W6*D Service Manual page 30

3-2. NO POWER
3-2-2 : Switch unit troubleshooting flow (for QW, QWL)
Switch Unit NOT FUNCTIONING
Check if Wire Harness
And Connector is
connected properly?
Yes
** Check 3.3V
in Pin2, CN1
No
(Switch Unit).
Is it 3.3V?
Yes
*Check Pin 1
Voltage Level in CN1
NG
(switch unit). Is
voltage level
according to key
pressed?
Yes
No
Change B-board
No
Change Wire Harness
And connect properly
**Check 3.3V in (Pin
8, CN9702 on
B board . Is it 3.3V?
Yes
Change Switch Unit
*VOLTAGE LEVEL FOR EACH PRESSED BUTTON (for QW, QWL, QT
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
30