Sony GN3UN - Switch Unit Troubleshooting Flow

3g.1.2 Switch Unit Troubleshooting Flow - General Checking
3g.1.2 Switch Unit Troubleshooting Flow
Switch Unit NOT FUNCTIONING
Yes
Change Switch Unit
Yes
No
NG
No
Yes
Change Wire Harness
And connect properly
Yes
Change B-board
No
*VOLTAGE LEVEL FOR EACH PRESSED BUTTON (for KM and KL (all model ) switch unit )
KEY Voltage
(average)
Voltage range
-
0.000 0.00 – 0.2
+
1.05 1.00 – 1.13
No Input
2.420 2.26 – 2.58
**see next page for probing point of Bboard
** Check 3.3V
in Pin3, CN1
(Switch Unit).
Is it 3.3V?
Check if Wire Harness
And Connector is
connected properly?
*Check Pin 2
Voltage Level in CN1 (switch
unit).Is voltage level
according to key pressed?
**Check 3.3V in (Pin 9,
CN9602 on
Bboard . Is it 3.3V?
FRONT VIEW
BACK VIEW
Pin 1
White wire(GND)
Pin 2
TACT KEY
Pin 3
POWER KEY
85