Oki OKIPAGE 10e Maintenance Manual page 219

B-5 Cooling fan error (ERROR 70).
• Is the fan rotating?
B-6 Option tray I/F timeout error (ERROR 81).
• Is the connection at the connector (2NDTRAY) properly engaged?
• Yes
B-7 Watchdog timer timeout error occurs frequently (ERROR 90), or illegal CPU version
(ERROR 91).
• Failure at IC1 (MHM2029-004K).
B-8 Program error (ERROR F*).
• Replace IC2 and IC3.
• Has the problem been solved?
• No
B-9 Processor error (ERROR 0*).
• Replace IC4, IC5.
• Has the problem been solved?
• No
41266201TH Rev.1
• No Is +38V power being supplied to Pin 1 (FAN POW) of the connector
(FAN)?
• No Is the output at Pin 109 (FANON-P) of IC1 (MHM2029-
004K) at high level?
• No
• Yes Is +38V power being supplied to Pin 3 of TR501?
• No
• Yes Replace TR501 and IC10 (NJM 2901 or PC339G2)
• Yes Are negative pulses being sent to Pin 3 (FANALM-N) of the connector
(FAN)?
• No Replace the fan.
• Failure of IC1 (MHM2029-004K).
• No Replace the connector (2NDTRAY).
Is the connection at the connector (ENVELOPE) properly engaged?
• No Replace the connector (ENVELOPE).
• Yes End.
Failure of IC1 (MHM2029-004K).
• Yes End.
Failure of IC1 (MHM2029-004K).
Failure of IC1 (MHM2029-004K).
Replace TR502, TR503 and TR504.
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