Toshiba e-STUDIO206L Service Manual page 743

Probable cause
Trailing edge detection sensors
(S39 and S40) abnormality
Horizontal registration detection
sensors (S39 and S40)
abnormality (B5-R/ST-R)
Horizontal registration detection
sensors (S39 and S40)
abnormality (A4-R/LT-R)
Horizontal registration detection
sensors (S39 and S40)
abnormality (B4/LG)
Horizontal registration detection
sensors (S39 and S40)
abnormality (A3/LD)
Faulty cables and connectors
Hole punch control PC board (HP)
abnormality
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Checking and measures
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.
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.
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.
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.
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.
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)
If the error still occurs after replacing the sensors and the
connectors, exchange the hole punch control PC board (HP).
e-STUDIO206L/256/306/356/456/506 / 207L/257/307/357/457/507
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ERROR CODE AND TROUBLESHOOTING
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