Oki C5100 Maintenance Manual page 90

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Missing image
• Are the LED heads dirty?
YES Clean dirty LED head(s).
• NO
NO
• YES
• YES Is +5V being output from the CU board (ARC PWB / OWL PWB) to the LED heads?
• YES Replace the LED head assys after checking cable connection. Has the problem been
• NO
YES End.
• 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 CU board (ARC PWB / OWL PWB) properly?
Check the connection cables between not properly connected LED head(s) and the CU
board, and connect them correctly.
Are +5V and +3.3V being output to the following HEADPOW connector pins of the CU board
(ARC PWB)?
+5V: Pins 16, 18, 20, 22 and 24
+3.3V: Pin 14
NO Replace the CU board (ARC PWB / OWL PWB).
resolved?
Replace the driver board (RSM PWB) after checking cable connection. Has the problem
been corrected?
Is 24V being output to the POWER connector on the engine board (RSN PWB)?
+24V: Pins 2, 4, and 6
Replace the low voltage power unit after checking cable connection.
Is 24V being output to the HVOLT connector pin 15 of the engine board (RSN PWB)?
Replace the engine board.
Replace the high voltage power unit or the belt unit after checking cable connection.
Are the pins of the image drum units are connected to the contact assy properly (see figure
5-3)?
Connect not properly connected pins to the contact assy correctly.
Replace the image drum units.
data onto a new engine board.
Oki Data CONFIDENTIAL
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