Service manual

9. CONNECTOR PIN ASSIGNMENT
Service Manual BSM-4100 9.23
Inverter Board
CN1 (for MAIN board)
Pin Number Signal Name Signal Description
1
2
3
4
5
6
7
8
+15V
+15V
E2
E2
CNT
VR
NC
NC
+15 V supply voltage for inverter
+15 V supply voltage for inverter
Digital ground
Digital ground
Backlight ON/OFF control
Brightness control
Not connected
Not connected
CN2 (for backlight)
Pin Number Signal Name Signal Description
1
2
3
4
5
6
7
Vout-Lo
NC
NC
NC
Vout-Hi
NC
Vout-Hi
Low voltage output for backlight (cold cathode tube)
Not connected
Not connected
Not connected
High voltage output for backlight (cold cathode tube)
Not connected
High voltage output for backlight (cold cathode tube)
CN101 (for Operation board)
Refer to “CN101 (for Function Dial board)” in the “Operation Board” section.
Function Dial Board