Display- Logic 15 V Power Fail
Description- Main control board PIB ±15 V power supply failure
Troubleshooting:
1. Check for +15 V on the power supply PS2 (from TB4-1)
– TB3-1 to PIB-J20-1 shall be +15 Vdc (to TB3-5 / PIB-J20-2)
2. Check for -15 V on the power supply PS3 (from TB4-2)
– TB3-9 to PIB-J20 shall be –15 Vdc (to TB3-5 / PIB-J20-2)