Oki C7400n Service Manual page 133

2-3 Paper feed jam
• Has the paper feed jam occurred immediately after power-on?
• Yes Is the paper jammed at the entrance belt sensor?
Yes Remove the jammed paper.
• No Does the write sensor lever move properly?
No Replace the write sensor lever.
• Yes Does the entrance belt sensor operate properly?
(Operate the sensor lever to check the signals on the FSENS connector pin of the engine
board (71K PWB).)
Pin 6: Entrance belt sensor
No Replace the sensor board (R71 PWB) after checking the cable connection.
• Yes Check the signal cable for connection. Is it connected properly?
No Connect the cable properly.
• Yes Replace the engine board.
• No Has the paper feed jam occurred immediately after the paper drawing into the tray?
• Yes Has the paper reached the write sensor?
Yes Go to
• No Is the registration motor running?
• No Does the registration of the registration motor lie at the rated value (approx. 7.9 )?
No
• Yes Replace the engine board after checking the gear engagement.
• Yes Replace the registration roller A or B.
• No Has the paper jam occurred during the paper loading?
• Yes Is the belt motor running?
• No Does the registration of the belt motor lie at the rated value (approx. 7.9 )?
No
• Yes Replace the engine board after checking the gear engagement.
• Yes Replace the belt cassette Assy after checking the gear engagement.
• No End
41316401TH Rev.4
.
Replace the registration motor.
Replace the belt motor.
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