Oki OKIPAGE 10e Maintenance Manual page 221

B-13 Paper input jam.
• Is the hopping motor rotating normally?
• No
B-14 Paper feed jam occurs frequently.
• Is the main (drum) motor rotaing normally?
41266201TH Rev.1
• No Are the waveforms of RMPH1-P and RMPH2-P signals as shown in
Section 3.8 (3) being sent to Pins 26 and 17 of IC8 (MTD2005F)
respectively?
• No Failure of IC1 (MHM2029-004K).
• Yes When the motor is rotating, does the output to Pin 20 and Pin 23 of
IC8 (MTD2005F) go high?
• No Failure of IC1 (MHM2029-004K).
Replace IC10 (NJM2901 or µPC339G2).
• Yes
• Yes Is the voltage at Pin 1 of IC8 (MTD2005F) +38V?
• No Is the voltage at Pin 2 of FU1 +38V?
• No
• Yes Replace IC8 (MTD2005F).
Failure of the power supply board or mechanical parts.
• No Are the waveforms of DMPH1-P and DMPH2-P as shown in Section
3.8 (2) being sent to Pins 13 and 8 of IC9 (A2918SW) respectively?
• No Failure of IC1 (MHM2029-004K).
• Yes When the main (drum) motor is rotating, is DMON1-N at Pin 7 and 14
of IC9 (A2918SW) low?
• No Failure of IC1 (MHM2029-004K).
• Yes Is the voltage at Pin 5 of IC9 (A2918SW) +38V?
• No Replace FU1 (FUSE).
• Yes Replace IC9 (A2918SW).
• No Failure of the power supply board or mechanical parts.
Replace FU1 (fuse).
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