Oki C5100 Maintenance Manual page 94

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Color different from original one
• Are the LED head lenses dirty?
YES Clean dirty LED head lens(es).
• NO
NO
• YES
• YES Is +5V being output to the CU board (ARC PWB / OWL PWB)?
• YES Replace the LED head assys after checking cable connection. Has the problem been
• NO
• NO
NO
• YES
NO
• YES
YES End.
• NO
NO
• YES
Note: When replacing the engine board (RSN PWB), extract EEPROM data from it and copy the
42049001TH Rev.1
Are the LED head assys connected to the connection board (ARC PWB / OWL PWB)
properly?
Check the cable connection between not properly connected LED assy(s) and the
connection board, and connect them correctly.
Are +5V and +3.3V being output to the CU board (ARC PWB / OWL PWB) HEAD connector
pins?
+5V: Pins 16, 18, 20, 22 and 24
+33.V: Pin 14
NO Replace the CU board (ARC PWB / OWL PWB).
corrected?
YES End.
Replace the driver board (RSM PWB) after checking cable connection. Has the problem
been resolved?
YES End.
Is 5V being output to the engine board (RSN PWB) POWER connector?
+5V: Pins 7, 8 and 9
Replace the low voltage power unit after checking cable connection.
Is 24V being output to the engine board (RSN PWB) HVOLT connector pin 15?
Replace the engine board.
Replace the high voltage power unit or the belt cassette assy after checking cable
connection. Has the problem been corrected?
Are the pins of the image drum units connected to the contact assy properly (see figure 5-3)?
Connect not properly connected pin(s) to the contact assy correctly.
Replace the imaged drum units.
data onto a new engine board.
Oki Data CONFIDENTIAL
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