41388601TH Rev.2 119 /
2 Dark background (Figure 6.2- B )
• Was each ID exposed to external light for a long time?
Yes Replace the ID unit.
Note:
Reset the counter after replacement.
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• No Are the rollers in the fuser unit contaminated?
Yes Replace the fuser unit.
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• No Adjust the setting of “MEDIA TYPE”.
Light: 60 g/sq.m. Med. light: 64~74 g/sq.m. Medium: 75~90 g/sq.m.
Med. heavy: 91~104 g/sq.m. Heavy: 105~122 g/sq.m. Ultra heavy: 123~175 g/sq.m.
No Set the “MEDIA TYPE” properly.
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• No Is each LED head assy connected to the junction board(Y71 PWB) correctly?
No Connect each LED head assy to the junction board(Y71 PWB) appropriately.
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• Yes Is +3.8V supplied to the following POWER connector pins on the junction board (Y71 PWB)?
+3.8 V: Pins 1, 2, 3, 4, 5, 6, 7 and 8
• Yes Is +3.8V supplied to the following cable connector pins between the junction board (Y71
PWB) and each LED head assy?
YPOW connector Pin 3: LED head assy yellow
MPOW connector Pin 3: LED head assy magenta
CPOW connector Pin 3: LED head assy cyan
BPOW connector Pin 3: LED head assy black
No Replace the junction board(Y71 PWB).
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• Yes Check the cable connection, or replace the LED head assy.
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• No Check the cable connection, or replace the low-voltage power supply unit. Recovered?
Yes End
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• No Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?
+32V: Pins 7, 8, 9 and 10
No Check the cable connection, or replace the low-voltage power supply unit.
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• Yes Is +32V supplied to the POWER connector pins of the engine board (K73 PWB)?
No Replace the engine board.
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• Yes Check the cable connection, or replace the high-voltage power supply unit or belt cassette
assy. Recovered?
Yes End
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• No Is each ID terminal connected to the contact assembly correctly? (See Figure 6.3.)
No Connect the ID terminals with the contact assembly correctly.
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• Yes Replace the ID unit.
Notes: When replacing the engine board (K73 PWB), demount the EEPROM chip from the old
engine board and remount it on the new one.
