HP C30 - Page 139

TAG 097: +12 Vdc Power Shorted or Sensing Problem
June 1999 Troubleshooting Analysis Guide (TAGs) 3-85
32 Turn the printer off and unplug the power cord.
• Disconnect J/P40.
• Check P40-34 to P12-8 for continuity to ground.
Is there continuity?
No: Continue.
Yes: Repair or replace the connectors or wiring from P40-34 to P12-8, then turn to TAG 002:
Check & Problem Resolution.
33 Reconnect J/P40 and J/P12.
• Disconnect J/P102.
• Turn on the printer.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Continue.
Yes: Replace the power control #3 board, then turn to TAG 002: Check & Problem Resolu-
tion.
34 Turn off the printer and unplug the power cord.
• Disconnect J/P40.
• Check P40-35 to P102-1 for continuity to ground.
Is there continuity?
No: You have failed to isolate the problem. Return to the beginning of this TAG.
Yes: Repair or replace the connectors or wiring from P40-35 to P102-1, then turn to TAG 002:
Check & Problem Resolution.
35 Turn off the printer.
• Reconnect J/P330.
• Disconnect J/P323.
• Turn on the printer.
• Check J/P330-2 for +12 Vdc.
Is the voltage +12 Vdc?
No: Go to #40 in this TAG.
Yes: Continue.
36 Turn off the printer.
• Reconnect J/P323.
• Disconnect J/P305.
• Turn on the printer.
• Check J/P330-2 for +12Vdc.
Is the voltage +12 Vdc?
No: Go to #39 in this TAG.
Yes: Continue.