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41955801TH Rev.8
138 /
Oki Data CONFIDENTIAL
0
Color irregularity compared with the original
•
Is the LED head lens dirty?
YES Clean the LED head lens.
▼
•
NO
Is the LED head assembly connected to the connection board (Y73 PWB) properly?
NO
Check the cable between the LED assembly and connection board and connect properly.
▼
•
YES
Is +5V output to the following HEADPOW connector pins on the connection board (Y73
PWB)?
+5V: Pin 1, 2, 3, 4, 5, 6
•
YES Is +5V output to the each LED head assemblies on the connection board (Y73 PWB)?
3 pin for YPOW connector : LED head assembly - yellow
3 pin for MPOW connector : LED head assembly - magenta
3 pin for CPOW connector : LED head assembly - cyan
3 pin for KPOW connector : LED head assembly - black
NO
Replace the connection board (Y73 PWB).
▼
•
YES Check the cable connections, then replace the LED head assembly.
▼
•
NO
Check the cable connections, then replace the low-voltage power unit. Did the printer
recover?
YES End.
▼
•
NO
Is 34V output to the power connector on the engine board (K7N/K7V PWB)?
+34V: Pin 12, 13, 14
NO
Check the cable connections, then replace the low-voltage power unit.
▼
•
YES
Is 34V output to HVOLT connector pin 2 on the engine board (K7N/K7V PWB)?
NO
Replace the engine board.
▼
•
YES
Check the cable connections, then replace the high-voltage power unit or belt cassette
assembly. Did the printer recover?
YES End.
▼
•
NO
Is the I/D unit terminal connected properly to the contact assembly. (See Fig. 5-3)
NO
Connect the I/D unit terminal properly to the contact assembly.
▼
•
YES
Replace the image drum unit.
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 life counter tool.
Содержание C7500n
Страница 14: ...41955801TH Rev 8 14 Oki Data CONFIDENTIAL 2 2 Parts layout Figure 2 1 A A B B A A B...
Страница 15: ...41955801TH Rev 8 15 Oki Data CONFIDENTIAL Top Cover Assy Figure 2 2 For 1200dpi For 600dpi...
Страница 16: ...41955801TH Rev 8 16 Oki Data CONFIDENTIAL Printer Unit 1 2 Figure 2 3 A A...
Страница 17: ...41955801TH Rev 8 17 Oki Data CONFIDENTIAL Printer Unit 2 2 Figure 2 4...
Страница 18: ...41955801TH Rev 8 18 Oki Data CONFIDENTIAL Cassette Guide Assy L R Figure 2 5 A B B A C C C C...
Страница 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...
Страница 84: ...41955801TH Rev 8 84 Oki Data CONFIDENTIAL Pattern 5 Pattern 6 Pattern 7...
Страница 140: ...41955801TH Rev 8 140 Oki Data CONFIDENTIAL Figure 5 3 Ground Charge Roller Developing Roller Toner Supply Roller...
Страница 176: ...41955801TL Rev 8 3 Oki Data CONFIDENTIAL A B A B C C C 13 29 23 C 29 10 24 24 23 23 Main Assembly 2 3...
Страница 177: ...41955801TL Rev 8 4 Oki Data CONFIDENTIAL 49 35 50 44 51 50 43 46 47 48 36 Main Assembly 3 3...
Страница 189: ...41955801TL Rev 8 9 Oki Data CONFIDENTIAL A B D C A B C D E E F G G F 2 3 3 6 3 3 4 4 4 5 4 1 4 4 4 4 4 4 4 4 Duplex Unit...
Страница 191: ...41955801TL Rev 8 10 10 Oki Data CONFIDENTIAL 2nd 3rd Tray 1 2 3 4 8 5 6 7...