The Printer Does Not Function Properly After Power On - Oki C9500dxn Maintenance Manual

1 The printer does not function properly after power ON.

• Turn the power OFF then ON.
• Is
• No Is the AC cable connected properly?
No Connect the AC cable properly.
• Yes Is +5V output to the panel connector (OPTN connector) on the engine board (K7N PWB)?
Pin 10, 11, 18: +5V
Yes Is +5V output to the panel connector on the relay board (Y73 PWB)?
Pin 5: +5V
No
Yes Is the operator panel cable connected properly?
No
Yes Replace the operator panel cable. Is operation recovered?
No
Yes End.
• No Is +5V output to the power connector on the engine board (K7N PWB)?
Pin 5, 6, 7, 8: +5V
No Check the power connection connector, then replace the low-voltage power supply
unit.
• Yes Replace the engine board.
• Yes Are the following voltages output to the PU IF connector on the main board?
Pin 137-147, 187-197
Pin 148, 198
Yes Replace the main board.
• No Is the following voltage output to the power connector on the engine board?
Pin 5, 6, 7, 8
Pin 15
Pin 12, 13, 14
Yes Replace the engine board.
• No Replace the low-voltage power supply unit.
41956001TH Rev.1
displayed? (Approx. 1 sec.)
Pin 5, 7, 15,20: 0V
Pin 2: 0V
Replace the relay board.
Connect the cable properly.
Replace the cover assembly of the operator panel.
Pin 1, 2, 3, 4, 9, 10, 11: 0V
: +5V Pin 125-136, 175-186
: +12V Pin 101-124, 149-174, 199, 200 : 0V
: +5V
: +12V
: +34V Pin 1, 2, 3, 4, 9, 10, 11
Oki Data CONFIDENTIAL
: +3.3V
: 0V
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