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41388601TH Rev.2 120 /
3 Blank paper (Figure 6.2- C )
• Is each LED head assembly connected to the junction board (Y71 PWB) and Engine board (K73
PWB)correctly?
No Check the cable connection the LED assembly with the junction board (Y71 PWB) and
engine board.
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• Yes Is +3.8V supplied to the following POWER connector pins on the junction board (Y71 PWB)?
+3.8V: Pin 1, 2, 3, 4, 5, 6, 7, 8
• Yes Is +3.8V supplied to the following cable connector pins between the junction board (Y71
PWB) and each LED head assembly?
YPOW connector Pin 3 : LED head assembly yellow
MPOW connector Pin 3 : LED head assembly magenta
CPOW connector Pin 3 : LED head assembly cyan
BPOW connector Pin 3 : LED head assembly black
No Replace the junction board (Y71 PWB).
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• Yes Check the cable connection, or replace the LED head assembly.
▼
• No Is +32V supplied to the POWER connector pins of the engine board (K73 PWB)?
+32V: Pin 7, 8, 9, 10
No Check the cable connection, or replace the low-voltage power supply unit.
▼
• Yes Is +32V supplied to the HVOLT connector Pin 5 of the engine board (K73 PWB)?
No Replace the engine board.
▼
• Yes Check the cable connection, or replace the high-voltage power supply unit or belt cassette
assembly. 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.
▼
• Yes Replace the ID unit.
Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old
engine board and remount it on the new one.
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.