Oki OKIPAGE 10ex Maintenance Manual page 243

B-6 Option RAM error (ERROR 60).
• The MENU PRINT memory capacity does not increase even when an expansion
memory board is installed.
• Are negative pulses being sent to Pin 83 (DRAS2-N), Pin 84 (DRAS3-N), Pin 85
(DRAS4-N), Pin 86 (DRAS5-N) of the connector (OPTION)?
• Yes
B-7 Cooling fan error (ERROR 70).
• Is the fan rotating?
B-8 SSIO error (ERROR 74).
• Is the connection at the connector (POWER) properly engaged?
• Yes
B-9 Operator panel I/F timeout error (ERROR 80).
• Is the connection at the connector (PANEL) properly engaged?
• Yes
40990901TH Rev.1
• No Failure of IC1 (MHM2029-004K).
Failure of Option PCB. Go to flowchart F-1 , G-1 or H-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 (POWER).
Failure of IC1 (MHM2029-004K).
• No Replace the connector (PANEL).
Failure of IC1 (MHM2029-004K).
Failure of IC1 (MHM2029-004K).
Replace TR502, TR503 and TR504.
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