41955801TH Rev.8
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Oki Data CONFIDENTIAL
(B)
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[Yellow/Magenta/Cyan Left/Right/Horizontal] display
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YES Replace the belt unit. Did the printer recover?
YES End.
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NO
Replace the ID unit. Did the printer recover?
YES End.
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NO
Is the gear abnormal? (Gear assembly such as I/D, multipurpose tray, belt unit, belt motor.)
YES Replace the damaged gear assembly.
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NO
Is the LED head unit connected to the connection board (Y73 PWB) properly?
NO
Connect the LED head unit to the connection board properly.
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YES Check the cable connections, then replace the LED head assembly. Did the printer recover?
YES End.
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•
NO
Check the cable connections, then replace the connection board (Y73 PWB). Did the printer
recover?
YES End.
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•
NO
Is the engine board (K7N/K7V PWB) connected to the connection board (Y73 PWB) properly?
NO
Connect the engine to the connection board properly.
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•
NO
Replace the engine board. Did the printer recover?
YES End.
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NO
Is the I/D terminal connected to the contact assembly properly? (See Fig. 5-3)
NO
Connect the I/D terminal to the contact assembly properly.
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YES Replace the image drum.
Note:
1. Remove EEPROM from the old board and set it on the new board upon replacing the
engine board (K7N PWB).
2. If EEPROM is not replaced, refer to section 3.2.2.
3. When replacing the engine board (K7V PWB), upload EEPROM data from the board and
then download it to a new board, using a maintenance utility.
Summary of Contents for C7500n
Page 14: ...41955801TH Rev 8 14 Oki Data CONFIDENTIAL 2 2 Parts layout Figure 2 1 A A B B A A B...
Page 15: ...41955801TH Rev 8 15 Oki Data CONFIDENTIAL Top Cover Assy Figure 2 2 For 1200dpi For 600dpi...
Page 16: ...41955801TH Rev 8 16 Oki Data CONFIDENTIAL Printer Unit 1 2 Figure 2 3 A A...
Page 17: ...41955801TH Rev 8 17 Oki Data CONFIDENTIAL Printer Unit 2 2 Figure 2 4...
Page 18: ...41955801TH Rev 8 18 Oki Data CONFIDENTIAL Cassette Guide Assy L R Figure 2 5 A B B A C C C C...
Page 19: ...41955801TH Rev 8 19 Oki Data CONFIDENTIAL Duplex Unit A B D C A B C D E E F G G F Figure 2 6...
Page 84: ...41955801TH Rev 8 84 Oki Data CONFIDENTIAL Pattern 5 Pattern 6 Pattern 7...
Page 177: ...41955801TL Rev 8 4 Oki Data CONFIDENTIAL 49 35 50 44 51 50 43 46 47 48 36 Main Assembly 3 3...
Page 191: ...41955801TL Rev 8 10 10 Oki Data CONFIDENTIAL 2nd 3rd Tray 1 2 3 4 8 5 6 7...