Oki OKIPAGE 10ex Troubleshooting Manual page 45

B-1 Abnormal message display on the LCD.
• Replace IC2, IC3.
• Has the problem been solbed?
• No
• Yes
• Yes
B-2 Program ROM error (ERROR 10).
• Replace IC2 and IC3.
B-3 Font ROM error (ERROR 20).
• Replace IC2 and IC3.
B-4 Resident RAM error (ERROR 30).
• Are negative pulses being put out to Pin 8 (DRASO-N) of IC4, IC5, IC6, IC7,
(MSM514807C-70JS)?
• Yes
• Yes
B-5 EEPROM error (ERROR 40).
• Replace IC12 (93LC46A).
• Has the problem been solved?
• No
40990901TH Rev.1
• Yes End.
Is the 7.067-MHz clock signal being sent to Pin 3 of OSC1?
• No Replace OSC1 (CST 7.067MTW).
Is the output at Pin 13 (CLRST-N) of IC10 (NJM2901 or PC339G2) normal
(see Section 3.3 Reset Control on page 7)?
• No Replace IC10 (NJM2901 or PC339G2).
Failure of IC1 (MHM2029-004K).
• No Failure of 03E (MHM2029-004K).
Are negative pulses being sent to Pin 23 (DCAS0-N, DCAS1-N, DCAS2-N,
DCS3-N) of IC4, IC5, IC6, IC7 (MSM514807C-70JS)?
• No Failure of IC1 (MHM2029-004K).
Replace IC4, IC5, IC6, IC7 (MSM514807C-70JS).
• Yes End.
Failure of IC1 (MNM2029-004K).
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