Oki OKIPAGE 10e Maintenance Manual page 216

A-9 Thermistor open error (ERROR 72), Thermistor short error (ERROR 73).
• Is the voltage output between (L) and (N) of the connector ACOUT correct (240V or
120V)?
• No
• Yes
• Yes
• Yes
41266201TH Rev.1
• Yes Replace IC2 (LC26023A).
• Has the problem been solved?
• Yes End.
• No Thermistor of fuser failure.
Is Pin 2 (HEAT-N signal) of PC1 (S21ME4) low?
• No Check the connection between the power supply board and main
control board.
Is Pin 1 (HEAT-NO signal) of PC1 (S21ME4) low?
• No Replace the photo coupler PC1 (S21ME4).
• Has the problem been solved?
• Yes End.
• No Replace the thyristor D1 (TM1241/TM1261).
Is Pin 10 of IC4 (324P) low?
• No Replace Q7 (2SC3400).
Replace IC4 (324P).
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