41955801TH Rev.8
117 /
Oki Data CONFIDENTIAL
2
-1 Feed jam (1st tray)
•
Do feed jams occur right after power ON?
•
Yes Is the jam at the entrance cassette sensor or entrance MT sensor?
Yes Remove the jammed paper.
(A)
▼
•
No
Does the sensor lever (entrance cassette sensor or entrance MT sensor) function properly?
No
Replace the faulty sensor lever.
▼
•
Yes Does the sensor (input cassette sensor, entrance MT sensor) function properly?
Operate each sensor lever and check the signal on the FSENS connector pin on the engine
board (K7N/K7V PWB).
Pin 4: Entrance sensor / Pin 2: Entrance MT sensor
No
Check the connection of the NO signal cable, then replace the engine.
▼
•
Yes Check the signal cable connection, then replace the sensor board (R71 PWB).
▼
•
No
Do feed jams occur right after papers are absorbed?
•
Yes Did the paper reach the entrance cassette sensor or entrance MT sensor?
Yes Proceed to (A).
▼
•
No
Replace the feed roller or paper separation frame assembly of the paper cassette.
▼
•
No
Is the main feed motor rotating?
Yes Replace the feed roller or paper separation frame assembly of the paper cassette.
▼
•
No
Is the main feed motor resistance within the regulated value (approx. 4
Ω
)?
No
Replace the main feed motor.
▼
•
Yes
Is 34V being output to the fuses F2 and F4 of the engine board K7N, or to the fuses F3 and
F4 of the engine board K7V?
No
Replace the low-voltage power unit.
▼
•
Yes
Check the gear mesh status and cable connections, then replace the engine board.
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...
