HP C30 - Page 138

TAG 097: +12 Vdc Power Shorted or Sensing Problem
3-84 Troubleshooting Analysis Guide (TAGs) June 1999
27 Turn the printer off.
• Remove the exit cover.
• Disconnect J/P49 and J/P51.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Go to #29 in this TAG.
Yes: Continue.
28 Turn the printer off.
• Reconnect J/P49.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Replace the paper exit sensor, then turn to TAG 002: Check & Problem Resolution.
Yes: Replace the output tray full sensor, then turn to TAG 002: Check & Problem Resolution.
29 Turn the printer off and unplug the power cord.
• Disconnect J/P50.
• Check J50-1 and J50-4 for continuity to ground.
Is there continuity 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: J50-1 to P49-1 or J50-4 To P51-1, then
turn to TAG 002: Check & Problem Resolution.
30 Turn the printer off.
• Disconnect J/P40.
• Check P40-26 for continuity to ground.
Is there continuity to ground?
No: Continue.
Yes: Repair or replace the connectors or wiring from: P40-26 to P54-1, P40-26 to P54-4, P40-
26 to P50-1, or P40-26 to P50-4, then turn to TAG 002: Check & Problem Resolution
31 Turn the printer off.
• Reconnect J/P40, J/P50, and J/P54.
• Disconnect J/P12.
• Turn the printer on.
• Check J/P8-6 for +12 Vdc.
Is the voltage +12 Vdc?
No: Continue.
Yes: Replace the power control #2 board, then turn to TAG 002: Check & Problem Resolu-
tion.