Oki Data CONFIDENTIAL
42049001TH Rev.1 91 /
8 Missing image
• Are the LED heads dirty?
YES Clean dirty LED head(s).
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• NO Are the LED head assys connected to the CU board (ARC PWB / OWL PWB) properly?
NO Check the connection cables between not properly connected LED head(s) and the CU
board, and connect them correctly.
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• YES 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
• YES Is +5V being output from the CU board (ARC PWB / OWL PWB) to the LED heads?
NO Replace the CU board (ARC PWB / OWL PWB).
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• YES Replace the LED head assys after checking cable connection. Has the problem been
resolved?
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• NO Replace the driver board (RSM PWB) after checking cable connection. Has the problem
been corrected?
YES End.
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• NO Is 24V being output to the POWER connector on the engine board (RSN PWB)?
+24V: Pins 2, 4, and 6
NO Replace the low voltage power unit after checking cable connection.
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• YES Is 24V being output to the HVOLT connector pin 15 of the engine board (RSN PWB)?
NO Replace the engine board.
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• YES Replace the high voltage power unit or the belt unit after checking cable connection.
YES End.
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• NO Are the pins of the image drum units are connected to the contact assy properly (see figure
5-3)?
NO Connect not properly connected pins to the contact assy correctly.
▼
• YES Replace the image drum units.
Note:
When replacing the engine board (RSN PWB), extract EEPROM data from it and copy the
data onto a new engine board.
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