JVC 250 Service Manual page 130

Figure 5-43 Backplane Diagram (middle section).
The following is a list of pins that would be helpful for troubleshooting purposes.
Low Voltage Power Supply (J8)
Pin # Signal or Voltage
8 /LV_ENA
9 /LV_OK
10 +24 V_FANS
11 _5.1 V Stdby
12 +5.1 V
13 +6.2 V
14 +15 V
15 -15 V
16 +80 V
17 /COVER_ON
18 /FAN_ENA
1-7 GND
Arc Lamp Power Supply (9)
Pin # Signal or Voltage
2 /LAMP_LIT
3 /LAMP_OK
4 /LAMP_ENA
5 /COVER_ON
1, 6 GND
Model 250 Service Manual
Chapter 5---Electronics
High Voltage Power Supply (J7)
Pin # Signal or Voltage
5 /HV_OK
8 +80 V
9 +15 V
10 -15 V
11 G1 SUPPLY
12 /VA_OK
1-4 GND
(28)
(see Figure 5-44)
Pin # Signal or Voltage
1 +5.1 V Stdby
2 GND
3 /COVER_ON
5-75