Oki ES9160, Maintenance Manual, Page: 648 / 1087

ES9160 MFP / ES9170 MFP © 2012 OKI DATA CORPORATION All rights reserved
ERROR CODE AND TROUBLESHOOTING
8 - 168
Probable cause Checking and measures
Trailing edge detection sensors
(S39 and S40) abnormality
Measure the voltage on TP48 on the hole punch control PC
board (HP). Then check that the measured voltage is 2.5V or
higher when not shielded and 1V or lower when shielded. If the
voltage does not fall within the range mentioned, replace a
couple of PC boards on either the light-receiving side or the
light-emitting side.
Horizontal registration detection
sensors (S39 and S40)
abnormality (B5-R/ST-R)
Measure the voltage on TP47 on the hole punch control PC
board (HP). Then check that the measured voltage is 2.5V or
higher when not shielded and 1V or lower when shielded. If the
voltage does not fall within the range mentioned, replace a
couple of PC boards on either the light-receiving side or the
light-emitting side.
Horizontal registration detection
sensors (S39 and S40)
abnormality (A4-R/LT-R) Measure the voltage on TP46 on the hole punch control PC
board (HP). Then check that the measured voltage is 2.5V or
higher when not shielded and 1V or lower when shielded. If the
voltage does not fall within the range mentioned, replace a
couple of PC boards on either the light-receiving side or the
light-emitting side.
Horizontal registration detection
sensors (S39 and S40)
abnormality (B4/LG) Measure the voltage on TP45 on the hole punch control PC
board (HP). Then check that the measured voltage is 2.5V or
higher when not shielded and 1V or lower when shielded. If the
voltage does not fall within the range mentioned, replace a
couple of PC boards on either the light-receiving side or the
light-emitting side.
Horizontal registration detection
sensors (S39 and S40)
abnormality (A3/LD)
Measure the voltage on TP44 on the hole punch control PC
board (HP). Then check that the measured voltage is 2.5V or
higher when not shielded and 1V or lower when shielded. If the
voltage does not fall within the range mentioned, replace a
couple of PC boards on either the light-receiving side or the
light-emitting side.
Faulty cables and connectors Check if the electrical continuity between the connector
terminals is normal. If electricity is not conducted, replace the
connector. (Hole punch control PC board (HP): CN4)
Hole punch control PC board (HP)
abnormality If the error still occurs after replacing the sensors and the
connectors, exchange the hole punch control PC board (HP).