Component (Symbol)

CN

Condition

Symptom

By-pass Paper Length Sensor

236-2 (IOB)

Open

Paper size error

Shorted

Duplex Entrance

217-A8 (IOB)

Open

Jam Z

Shorted

Jam Z

Duplex Cover

217-A11 (IOB)

Open

"Open Cover" is displayed.

Shorted

“Open cover" cannot be detected.

Duplex Exit

217-A14 (IOB)

Open

Jam Z

Shorted

am Z (Jam 1)

By-pass Paper End

217-B3 (IOB)

Open

The Paper End indicator lights even if paper is placed on the by-pass tray.

Shorted

The Paper End indicator does not light even if there is no paper on the by-pass tray.

By-pass Paper Size

217-B9, B10,B12,B13 (IOB)

Open

Paper size error

Shorted

Toner Overflow

217-B15 (IOB)

Open

CPU cannot detect the toner overflow even the waste toner in the transfer belt unit is full.

Shorted

CPU detects the toner overflow even the waste toner in the transfer belt unit is not full.

Component (Symbol)

CN

Condition

Symptom

Paper Feed 1

216-A4 (IOB)

Open/Shorted

No symptom, but this may cause Jam A, and some pieces of paper are remaining at the paper feed unit when tray 1 is opened.

Relay 1

216-A7 (IOB)

Open

Jam A

Shorted

Jam A, B

Paper End 1

216-A10 (IOB)

Open

The Paper End indicator lights even if paper is placed in the paper tray 1.

Shorted

The Paper End indicator does not light even if there is no paper in the paper tray 1.

Tray Lift 1

216-A13 (IOB)

Open/ Shorted

SC501 is displayed.

Paper Feed 2

216-B4 (IOB)

Open/ Shorted

No symptom, but this may cause Jam A and some pieces of paper are remaining at the paper feed unit when tray 2 is opened.

Relay 2

216-B7 (IOB)

Open

Jam A

Shorted

Jam A, B

Paper End 2

216-B10 (IOB)

Open

The Paper End indicator lights even if paper is placed in the paper tray 2.

Shorted

The Paper End indicator does not light even if there is no paper in the paper tray 2.

Component (Symbol)

CN

Condition

Symptom

Tray Lift 2

216-B13 (IOB)

Open/ Shorted

SC502 is displayed.

Registration

209-2 (IOB)

Open

Jam A (Jam 8, 17)

Shorted

Jam A, B (Jam 1)

Paper Size 1

209-4, 5, 5, 8 (IOB)

Open/ Shorted

Paper size error in tray 1

Paper Size 2

209-9, 10,

11, 13 (IOB)

Open/ Shorted

Paper size error in tray 2

Lower Paper Height 1

210-4 (IOB)

Open/ Shorted

Remaining paper volume in tray 2 on the LCD is wrong.

Lower Paper Height 2

210-7 (IOB)

Open/ Shorted

Upper Paper Height 1

210-12 (IOB)

Open/ Shorted

Remaining paper volume in tray 1 on the LCD is wrong.

Upper Paper Height 2

210-15 (IOB)

Open/ Shorted

Junction Jam

221-A10 (IOB)

Open/ Shorted

Jam C

Paper Exit

221-B2 (IOB)

Open

Jam C

Shorted

Jam C

Fusing Exit

221-B5 (IOB)

Open

Jam C

Shorted

Jam C

Component (Symbol)

CN

Condition

Symptom

Paper Overflow

221-B8 (IOB)

Open

Paper overflow message is not displayed when a paper overflow condition exists.

Shorted

Paper overflow message is displayed when a paper overflow condition does not exist.

TD (Toner Density)

213-14 (IOB)

Open

The add toner indicator blinks even if there is toner in the development unit.

Shorted

SC390 is displayed.

Web End

208-16 (IOB)

Open

CPU detects the web end even the web is not used up.

Shorted

CPU cannot detect the web end even the web is used up.

ID (Image Density)

208-11 (IOB)

Open

SC350 is displayed after copying.

Shorted

SC351 is displayed after copying.

Fusing Entrance

208-8 (IOB)

Open

CPU cannot detect paper even a sheet of paper remains at the fusing unit.

Shorted

CPU detects paper even a sheet of paper does not remain at the fusing unit.

Scanner Home Position

318-2 (SIO)

Open

SC121 is displayed.

Shorted

SC120 is displayed.