Description: LCD does not display (operation panel)
Causes: • Powered up? • VCC(+5v) M+4.5V? • Is the level of U16-130(_POR) high (more than +4V)? • Check Main to OPE harness and J3(main). • Is the level of U16-153 (_RST_OUT) high (more than +4V)? • Is the level of U18-31 (_OPE_RST) high (more than +4V)? • Check control signals of U16-124, 125(OPE_TXD, OPE_RXD).
Remedy: • Check power.(SMPS) a Check if the cord is connected. b Check each power channel. (+5V, +11.75V, +30V) • Check power harness. • Check the circuit around U103. • Replace defective parts. • Check the state of data bus of U16.: Replace the main PBA. • Check the circuit around U18. • If signals of OPE_TXD are defective, replace the main PBA. If signals of OPE_RXD is defective, replace OPE PBA.(Refer to circuit explanation.
Code: 14
Description: Cannot enter by keys(operation panel)
Causes: • Refer to 4-7 of LCD does not display. • Check OPE key contacts.
Remedy: • Refer to 4-7 of LCD does not display. • Replace OPE.
Code: 15
Description: LF MOTOR does not operate.
Causes: • Check the control signals of U16- 141-145. • Check input signals and driving output of U1 and U2.
Remedy: • If control signals are not made when the other functions are normal, replace the main PBA. • If driving output is defective when input signals are normal, replace U1 and U2.
Code: 16
Description: CR MOTOR does not operate.
Causes: • Check the control signals of U16- 31-36. • Check input signals and driving output of U25 and U28.
Remedy: • If control signals are not made when the other functions are normal, replace the main PBA. • If driving output is defective when input signals are normal, replace U25 and U28.
Code: 17
Description: TX MOTOR does not operate.
Causes: • Check the operation of the document sensor of OPE PBA. • Check the operation of TX Motor. 1 Check the control signals of U18- 105-110. 2 Check input signals and driving output of U23 and U24.
Remedy: • If defective, replace the sensor. • 1 If control signals are not made when the other functions are normal, replace the main PBA 2 If driving output is defective when the other functions are normal, replace U23 and U24.
Code: 18
Description: Paper Jam
Causes: • Check sheet feeder and ejector. • Check the operation of LF motor. • Check paper exit sensor.
Remedy: • Get rid of jammed paper. • Refer to LF motor does not operate. • If the sensor senses paper exit when it operates normally, replace the main PBA.