HP C30 - Page 137

TAG 097: +12 Vdc Power Shorted or Sensing Problem
June 1999 Troubleshooting Analysis Guide (TAGs) 3-83
22 Turn the printer off.
• Reconnect J/P40, J/P58, J/P60, and J/P62.
• Disconnect J/P50 and J/P54.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Go to #30 in this TAG.
Yes: Continue.
23 Turn the printer off.
• Reconnect J/P50.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Go to #27 in this TAG.
Yes: Continue.
24 Turn the printer off.
• Reconnect J/P54.
• Disconnect J/P53.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Continue.
Yes: Replace the front tray sensor, then turn to TAG 002: Check & Problem Resolution.
25 Turn the printer off.
• Disconnect J/P55.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Continue.
Yes: Replace the rear tray sensor, then turn to TAG 002: Check & Problem Resolution.
26 Turn the printer off and unplug the power cord.
• Disconnect J/P54.
• Check J54-1 and J54-4 for continuity to ground.
Is there continuity to ground at either?
No: You have failed to isolate the problem. Return to the beginning of this TAG.
Yes: Repair or replace the connectors or wiring from: J54-1 to P53-1 or J54-4 to P55-1, then
turn to TAG 002: Check & Problem Resolution.