41316401TH Rev.9
114 /
Oki Data CONFIDENTIAL
3
Blank Page (Figure 5-2 C )
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Are the LED head Assys connected to the junction board (Y71 PWB) and the engine board (71K PWB)
properly?
No
Connect the LED Assy(s) to the junction board (Y71 PWB) and the engine board (71K PWB)
properly, checking the cable connection.
▼
•
Yes
Is +3.8V output to the following power connector pins of the junction board (Y71K PWB)?
+3.8V: Pins 1 to 8
•
Yes Is +3.8V output to the following cable connector pins between the junction board (Y71 PWB)
and the LED heads?
YPOW connector pin 3: LED head Assy Yellow
MPOW connector pin 3: LED head Assy Magenta
CPOW connector pin 3: LED hdad Assy Cyan
KPOW connector pin 3: LED head Assy Black
No
Replace the junction board (Y71 PWB).
▼
•
Yes Replace the LED head Assy(s) after checking the cable connection.
▼
•
No
Is 32V output to the power connector of the engine board (71K PWB)? +3.8V: Pins 7 to 10
No
Replace the low voltage power unit after checking the cable connection.
▼
•
Yes
Is 32V output to the HVOLT connector pin 5 of the engine board (71K PWB)?
No
Replace the engine board.
▼
•
Yes
Replace the high voltage power unit or the belt cassette Assy after checking the cable
connection. Has the problem been corrected?
Yes End
▼
•
No
Are the ID terminals connected to the contact Assy properly? (See Figure 5-2.)
No
Connect the I/D terminal(s) to the contact Assy properly.
▼
•
Yes
Replace the I/D drum unit(s).
Notes: 1. When replacing the engine board (71K PWB), demount the EEPROM from the board and
mount it on a new board.
2. When the EEPROM is not replaced, see Section 3.2.2.
Summary of Contents for C7400
Page 14: ...41316401TH Rev 9 14 Oki Data CONFIDENTIAL 2 2 Parts layout Figure 2 1 A B A B B A A B...
Page 15: ...41316401TH Rev 9 15 Oki Data CONFIDENTIAL Top Cover Assy Figure 2 2...
Page 16: ...41316401TH Rev 9 16 Oki Data CONFIDENTIAL Printer Unit 1 2 Figure 2 3 A A...
Page 17: ...41316401TH Rev 9 17 Oki Data CONFIDENTIAL Printer Unit 2 2 Figure 2 4 45...
Page 18: ...41316401TH Rev 9 18 Oki Data CONFIDENTIAL Cassette Guide Assy L R Figure 2 5 A B B A C C C C...
Page 19: ...41316401TH Rev 9 19 Oki Data CONFIDENTIAL Duplex Unit A B D C A B C D E E F G G F Figure 2 6...
