HP C30 manual Is the voltage 0.5 Vdc?, Are any of the values out of specification?

15 Reconnect J/P41 and J/P24.

•Turn the printer on.

•Run test prints.

•Check TP4-40 for 0.5 Vdc while running the prints.

Is the voltage 0.5 Vdc?

No: Replace the PCL board, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

16 Is a meter with a high voltage probe available?

No: Go to #19 in this TAG.

Yes: Continue.

17 Using a high voltage probe, check J/P25-7 for the proper voltage, as described in Chapter 9, “Gen- eral Printer Maintenance” .

Is the voltage correct?

No: Replace the high voltage unit, then turn to TAG 002: Check & Problem Resolution.

Yes: Continue.

18 Check the main charger, transfer charger, grid, and cleaning bias described in Chapter 9, “General Printer Maintenance” .

Are any of the values out of specification?

No: Go to #20 in this TAG.

Yes: Replace the high voltage unit, then turn to TAG 002: Check & Problem Resolution.

19 Replace the high voltage unit.

Has the problem been resolved?

No: Reinstall the original high voltage unit and continue.

Yes: Turn to TAG 002: Check & Problem Resolution.

20 Replace the PCL board.

Has the problem been resolved?

No: Reinstall original PCL board. Go back to #3 in this TAG. If this does not resolve the prob- lem, the IGS board, cleaner terminal assembly, or main charger terminal assembly may be at fault. Determine which of these is at fault, correct the problem, then turn to TAG 002: Check & Problem Resolution.

Yes: Turn to TAG 002: Check & Problem Resolution.

21 Check J/P40-31 for 0 Vdc.

Is the voltage 0 Vdc?

No: Replace the power control #2 board, then turn to TAG 002: Check & Problem Resolu- tion.

Yes: Continue.

Troubleshooting Analysis Guide (TAGs) 3-185