Oki C5100 Maintenance Manual page 72

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1 The printer does not operate properly after it is turned on.
• Turn the printer off and on again.
• Does
• NO
• YES Is +5V being output to the operator panel connector (OPE connector) on the engine board
• NO
• YES Replace the engine board.
• YES
YES Replace the CU Board.
• NO
YES Replace the engine board.
• NO
42049001TH Rev.1
appear (for about one second)?
Is the AC cable connected properly?
NO Connect the AC cable properly.
(RSN PWB)?
Pin 4: +5V. Pin 7: 0V.
YES Is +5V being output to the connector CN1 on the OPE board (RSP PWB)?
Pin 4: +5V. Pin 7: 0V.
• NO Is the operator panel cable connected properly?
NO Connect the cable properly.
• YES Replace the operator panel cable. Has the printer recovered from the error?
NO Replace the OPE board.
• YES End.
Is +5V being output to the POWER connector on the engine board (RSN PWB)?
Pins 7 to 9: +5V. Pins 1 to 3, and 13 to 17: 0V.
NO Replace the low voltage power unit after checking the connection of the POWER
connector.
Are the following voltages being output to the CU board PUIF connector?
Pins 7 and 8: +5V. Pins 4 and 5: +3.3V. Pins 1, 2, 3 and 6: 0V.
Are the following voltages being output to the POWER connector on the engine board?
Pins 7 to 9: +5V. Pins 10 to 12: +3.3V. Pins 4 to 6: +24V. Pins 1 to 3, and 13 to 17: 0V.
Replace the low voltage power unit.
Oki Data CONFIDENTIAL
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