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7. Check the transfer unit upper level sensor (TUUL).
a. Remove the transfer elevator motor.
b. Remove the transfer unit upper limit / lower limit sensors, without
c. Put the positive lead of the digital multimeter on pin 8 of CN28 on the I/O
d. With the TUUL blocked, measure the voltage; 5V is normal.
e. With the TUUL open, measure the voltage; 0V is normal.
If voltage is not normal, replace the TUUL after checking the harness.
8. Determine if the transfer elevator is overloaded.
a. Replace the transfer elevator motor.
b. When the transfer elevator motor is operating, the transfer unit and
c. During movement, there should not be any abnormal noise.
d. When you pull out the transfer unit and power ON the printer, the elevator
If necessary, check the transfer unit load. Otherwise, replace the I/O board.
9. Check the transfer unit lower level sensor (TULL).
a. Put the positive lead of the digital multimeter on pin 11 of CN28 on the I/O
b. With the TULL blocked, measure the voltage; 5V is normal.
c. With the TULL open, measure the voltage; 0V is normal.
If voltage is not normal, replace the TULL after checking the harness.
10. Check the TUUL and TULL positions. After installing the transfer elevator,
TUUL, and TULL, check the following:
a. Put the positive lead of the digital multimeter on pin 8 of CN28 on the I/O
b. With the transfer position raised to the upper limit, measure the voltage; 5V
Troubleshooting
disassembling them from the bracket.
board, and the negative lead on the SG.
transfer/separator section should move up and down.
motor axis should make 1 rotation.
board, and the negative lead on the SG.
board, and the negative lead on the SG.
is normal.
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