Ap Af Af

White Horizontal Lines

See Table 22

Toner on Back

See Table 26

Bad Fusing

See Table 24

Blank Spots

See Table 25

Toner on Back

See Table 26

Figure 31. Print Quality Problems

Table 15. All-Blank Page

Step

Check

Result

Action

1

Remove the toner cartridge from the printer. Is the toner cartridge sealing tape removed?

No

Remove the sealing tape.

2

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

3

Are the high-voltage contacts making good contact with the toner cartridge?

No

Clean the contacts or replace the high-voltage contact assembly.

4

Remove the toner cartridge from the printer. Is any foreign material blocking the laser beam outlet on the inside of the printer chassis? Is any foreign material adhering to the laser beam access slot on the toner cartridge?

Yes

Remove the foreign material.

5

Inspect the drive assembly gear train. Are any gears damaged?

Yes

Replace the drive assembly.

6

Replace the transfer roller. Does the print quality improve?

Yes

Problem solved.

7

Connect the multimeter between connectors P15-7 and P15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

All-Blank Page (Continued)

Step

Check

Result

Action

8

For Steps 8 and 9, remove the top covers, side covers, rear cover, I/O board mount, and the power switch lever.

Remove the high-voltage contact assembly and check the continuity on all the high-voltage contacts. Do you find continuity on all the high-voltage contacts?

No

Replace the high-voltage contact assembly.

9

Is there continuity between connector RTN (red wire) on the high-voltage power supply and the red spade connector on the paper delivery guide?

No

Replace the paper delivery guide.

10

Replace the DC controller board. Does the print quality improve?

Replace the toner cartridge sensor and high-voltage power supply cable. If the problem persists, replace the high-voltage power supply.

Table 16. All-Black Page

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Are the high-voltage contacts making good contact with the toner cartridge?

No

Clean the contacts or replace the high-voltage contact assembly.

All-Black Page (Continued)

Step

Check

Result

Action

3

Connect the multimeter between connectors P15-7 and P15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

4

Is there continuity between CRU (spring plate) on the high-voltage contact assembly and jack CR on the high-voltage power supply?

No

Replace the high-voltage contact assembly.

5

Is there continuity between P15 on the DC controller board and P111 on the high-voltage power supply?

Yes

Replace the toner cartridge sensor and high-voltage power supply cable.

6

Replace the DC controller board. Does the print quality improve?

Replace the high-voltage power supply.

Table 17. Light/Faded Image

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Reload the paper cassette tray with known-good paper. Does the print quality improve?

Yes

Problem solved.

Light/Faded Image (Continued)

Step

Check

Result

Action

3

Remove the toner cartridge from the printer. Is any foreign material blocking the laser beam outlet on the inside of the printer chassis? Is any foreign material adhering to the laser beam access slot on the toner cartridge?

Yes

Remove the foreign material.

4

Are the high-voltage contacts making good contact with the toner cartridge?

No

Clean the contacts or replace the high-voltage contact assembly.

5

Replace the transfer roller. Does the print quality improve?

No

Problem solved.

6

Connect the multimeter between connectors P15-7 and P15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

7

For Steps 7 and 8, remove the top cover, side covers, I/O board mount, and the power switch lever.

Remove the high-voltage contact assembly and check the continuity on all the high-voltage contacts. Did you find continuity on all the high-voltage contacts?

No

Replace the high-voltage contact assembly.

8

Is there continuity between connector RTN (red wire) on the high-voltage power supply and the red spade connector on the paper delivery guide?

No

Replace the paper delivery guide.

Light/Faded Image (Continued)

Step

Check

Result

Action

9

Replace the DC controller board. Does the print quality improve?

Replace the toner cartridge sensor and high-voltage power supply cable. If the problem persists, replace the high-voltage power supply.

Table 18. Dark Image Over Entire Page

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Is the transfer roller dirty?

Yes

Replace the transfer roller.

3

Connect the multimeter between connectors P15-7 and P15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer.

No

Go to Table 11, Power Supply Failure (+24 VDC).

4

Remove the top cover, side covers, rear cover, I/O board mount, and the power switch lever.

Remove the high-voltage contact assembly and check the continuity on all the high-voltage contacts. Do you find continuity on all the high-voltage contacts?

No

Replace the high-voltage contact assembly.

5

Replace the DC controller board. Does the print quality improve?

Replace the toner cartridge sensor and high-voltage power supply cable. If the problem persists, replace the high-voltage power supply.

Table 19. Black Vertical Lines

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Replace the transfer roller. Does the print quality improve?

No

Connect the grounding contact to the static eliminator.

3

Remove the paper delivery guide. Is the static eliminator on the paper delivery guide properly grounded?

No

Connect the grounding contact to the static eliminator.

4

Remove the fuser assembly and inspect the fuser heater roller. Are there scratches on the fuser heater roller?

Yes

Replace the fuser heater roller or the fuser assembly.

Table 20. White Vertical Lines

Step

Check

Result

Action

1

Remove the toner cartridge from the printer. Is any foreign material blocking the laser beam outlet on the inside of the printer chassis?

Yes

Remove the foreign material.

2

Inspect the paper path. Is any foreign material blocking the paper path?

Yes

Remove the foreign material.

3

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

4

Replace the transfer roller. Does the print quality improve?

Yes

Problem solved.

White Vertical Lines (Continued)

Step

Check

Result

Action

5

Remove the fuser assembly and heater roller. Are there scratches on the fuser heater roller?

Yes

Replace the fuser heater roller or the fuser assembly.

6

Replace the I/O board. Does the print quality improve?

Yes

Problem solved.

Table 21. Black Horizontal Lines

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Are the high-voltage contacts making good contact with the toner cartridge?

No

Clean the contacts or replace the high-voltage contact assembly.

3

Replace the transfer roller. Does the print quality improve?

Yes

Problem solved.

4

Remove the fuser assembly and inspect the fuser heater roller. Are there scratches on the fuser heater roller?

Yes

Replace the fuser heater roller or the fuser assembly.

5

Connect the multimeter between connectors P15-7 and 15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

Black Horizontal Lines (Continued)

Step

Check

Result

Action

6

Remove the top cover, side covers, rear cover, I/O board mount, and the power switch lever.

Remove the high-voltage contact assembly and check the continuity on all the high-voltage contacts. Do you find continuity on all the high-voltage contacts?

No

Replace the high-voltage contact assembly.

7

Replace the DC controller board. Does the print quality improve?

Yes

Problem solved.

8

Replace the toner cartridge sensor and high-voltage power supply cable. Does the print quality improve?

Yes

Problem solved.

9

Replace the high-voltage power supply. Does the print quality improve?

Yes

Problem solved.

10

Replace the I/O board. Does the print quality improve?

Yes

Problem solved.

Table 22. White Horizontal Lines

Step

Check

Result

Action

1

Check the paper in the paper cassette tray for dampness. Is the paper damp?

Yes

Replace the paper.

2

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

White Horizontal Lines (Continued)

Step

Check

Result

Action

3

Are the high-voltage contacts making good contact with the toner cartridge?

No

Clean the contacts or replace the high-voltage contact assembly.

4

Remove the toner cartridge from the printer. Is any foreign material blocking the laser beam outlet on the inside of the printer chassis? Is any foreign material adhering to the laser beam access slot on the toner cartridge?

Yes

Remove the foreign material.

5

Replace the transfer roller. Does the print quality improve?

Yes

Problem solved.

6

Connect the multimeter between connectors P15-7 and P15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

7

For Steps 7 and 8, remove the top covers, rear cover, I/O board mount, and power supply switch lever.

Remove the high-voltage contact assembly and check the continuity on all the high-voltage contacts. Do you find continuity on all the high-voltage contacts?

No

Replace the high-voltage contact assembly.

8

Is there continuity between connector RTN (red wire) on the high-voltage power supply and the red spade connector on the paper delivery guide?

No

Replace the paper delivery guide.

White Horizontal Lines (Continued)

Step

Check

Result

Action

9

Replace the DC controller board. Does the print quality improve?

Replace the toner cartridge sensor and high-voltage power supply cable. If the problem persists, replace the high-voltage power supply.

10

Replace the toner cartridge sensor and high-voltage power supply. Does the print quality improve?

Yes

Problem solved.

11

Replace the high-voltage power supply. Does the print quality improve?

Yes

Problem solved.

12

Replace the I/O board. Does the print quality improve?

Yes

Problem solved.

Table 23. Ghosting

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Is the transfer roller dirty?

Yes

Replace the transfer roller.

3

Remove the fuser assembly and inspect the fuser heater roller and the fuser pressure roller. Are there scratches on either roller?

Yes

Replace the fuser heater roller, the fuser pressure roller, or the fuser assembly.

4

Connect the multimeter between connectors P15-7 and P15-1 on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24VDC).

Ghosting (Continued)

Step

Check

Result

Action

5

Remove the top cover, side covers, rear cover, I/O board mount, and power supply switch lever.

Remove the high-voltage contact assembly and check the continuity on all the high-voltage contacts. Do you find continuity on all the high-voltage contacts?

No

Replace the high-voltage contact assembly.

6

Replace the DC controller board. Does the print quality improve?

Replace the toner cartridge sensor and high-voltage power supply cable. If the problem persists, replace the high-voltage power supply.

Table 24. Bad Fusing

Step

Check

Result

Action

1

Check the paper in the paper cassette tray for dampness. Is the paper damp?

Yes

Replace the paper.

2

Is the fuser assembly properly installed and secure?

No

Reinstall the fuser assembly.

3

Install a known-good fuser assembly. Does the print quality improve?

Yes

Problem solved.

4

Install a known-good power supply. Does the print quality improve?

Yes

Problem solved.

5

Install a known-good DC controller. Does the print quality improve?

Yes

Problem solved.

Table 25. Blank Spots/Random Pattern or Location

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Check the paper in the paper cassette tray for dampness. Is the paper damp?

Yes

Replace the paper.

3

Is the transfer roller dirty?

Yes

Replace the transfer roller.

4

Remove the fuser assembly and inspect the fuser heater roller and the fuser pressure roller. Are there scratches on either of the rollers?

Yes

Replace the fuser heater roller, the fuser pressure roller, or the fuser assembly.

Table 26. Toner on Back of Page

Step

Check

Result

Action

1

Replace the toner cartridge. Does the print quality improve?

Yes

Problem solved.

2

Does the printer operating environment meet recommended setup and operating conditions?

No

Make recommended changes to printer operating environment or setup. See the Pre-Power-On Checklist section under "Troubleshooting the LaserWriter Select 360" for recommended setup and operating instructions.

3

Is the transfer roller dirty?

Yes

Replace the transfer roller.

4

Remove the fuser assembly and inspect the fuser heater roller and the fuser pressure roller. Are there scratches on either of the rollers?

Yes

Replace the fuser heater roller, the fuser pressure roller, or the fuser assembly.

Table 27. Paper Jams in Fuser/Delivery Area

Step

Check

Result

Action

1

Initiate a service test page. Does the test page jam as it leaves the fuser assembly?

No

Problem solved.

2

Is the cable that runs to the paper delivery sensor securely connected?

No

Reconnect the cable to the paper delivery sensor.

3

Initiate another test page and observe the action of the delivery lever on the fuser assembly.

Does the lever swing freely when paper passes through the fuser assembly?

No

Replace the delivery sensor lever.

4

Allow the fuser rollers to cool and then remove the fuser assembly. Inspect the fuser rollers. Are the fuser rollers worn or damaged?

Yes

Replace the fuser assembly.

5

Do the fuser rollers rotate without binding?

Yes

Replace the fuser assembly.

6

Remove the I/O shield, the I/O board, and the I/O board mount. Replace the fuser assembly and disconnect P111 from the high-voltage power supply.

Connect a multimeter between connector pins P16-1 (PULLUP +5 V) and P16-2 (GND) on the DC controller board. Does the voltage measure +5 VDC when you switch on the printer?

No

Go to Table 12, Power Supply Failure (+5 V).

Paper Jams in Fuser/Delivery Area (Continued)

Step

Check

Result

Action

7

Verify that the cable that runs to the paper delivery sensor is still securely connected. Connect a multimeter across connector pins P16-3 (EXIT) and P16-2 (GND) on the DC controller board. Manually actuate the paper delivery sensor by inserting a sheet of paper between the sensor arms. Does the voltage drop from +5 VDC to 0 VDC when you remove the paper from the sensor?

Yes No

Replace the DC controller board.

Replace the paper delivery sensor. If the problem persists, replace the delivery sensor cable.

Table 28. Paper Jams in Paper Pickup Area

Step

Check

Result

Action

1

Reload the paper cassette tray with known-good paper. Does the problem still occur?

No

Problem solved.

2

Does the jam occur when the manual feed or optional multipurpose tray is being used?

Yes

Go to Step 17.

3

Is the paper cassette installed properly in the printer?

No

Reinstall the paper cassette properly.

4

Is the paper cassette loaded with too much paper?

Yes

Remove the excess paper.

5

Are the cassette feed rollers damaged or worn?

Yes

Replace the cassette pickup rollers.

6

Are the cassette feed rollers damaged or worn?

Yes

Replace the cassette feed roller shaft.

Paper Jams in Paper Pickup Area (Continued)

Step

Check

Result

Action

7

Is connector P13 on the DC controller board making good contact?

No

Reconnect P13 to the DC controller board.

8

Is connector P115 on the cassette feeder board making good contact?

No

Reconnect P115 to the cassette feeder board.

9

Are the cassette pickup and cassette feed solenoids securely connected to the cassette feeder board?

No

Reconnect P201 and P202 to the cassette feeder board.

10

Switch off the printer. Connect the multimeter between P13-7 (+24 V) and P13-8 (TURN1). Does the resistance measure between 220 and 240 Q. ?

No

Replace the cassette feed solenoid.

11

Connect the multimeter between P13-10 (+24 V) and P13-11 (FEED1). Does the resistance measure between 110 and 130 Q. ?

No

Replace the cassette pickup solenoid.

12

Open the front access door and locate the paper registration arm on the paper charge deflector. Is the paper registration arm damaged or broken?

Yes

Replace the paper registration arm.

13

Close the front access door and disconnect connector P16 from the DC controller board. Connect a multimeter between connector pins P16-4 (PULLUP 5 V) and P16-5 (GND) on the DC controller board. Does the voltage measure +5 VDC when you switch on the power?

No

Go to Table 12, Power Supply Failure (+5 VDC).

Paper Jams in Paper Pickup Area (Continued)

Step

Check

Result

Action

14

Replace the DC controller board. Does the problem still occur?

No

Problem solved.

15

Reconnect connector P16 to the DC controller board. Connect a multimeter between pins P16-6 (/PREREG) and P16-5 (GND) on the DC controller board. Initiate a service test page. Does the voltage drop from +5 VDC to 0 VDC when the paper passes the paper registration sensor?

No

Replace the paper registration sensor located on the paper charge deflector.

16

Does the manual feed or multipurpose tray have too much paper? (The manual feed tray holds one sheet of paper at a time and the multipurpose tray holds 50 sheets of paper.)

Yes

Remove excess paper.

17

Is connector P17 on the DC controller board making good contact?

No

Reconnect connector P17 to the DC controller board.

18

Open the front access door and observe the rollers on the pickup roller assembly. Are the pickup rollers worn or deformed?

Yes

Replace the pickup rollers.

19

Using a paper clip or screwdriver, manually activate the manual feed solenoid. Manually rotate the large black gear on the pickup roller assembly toward the manual feed solenoid. Does the pickup roller rotate without binding?

No

Replace the pickup roller assembly.

Paper Jams in Paper Pickup Area (Continued)

Step

Check

Result

Action

2O

Disconnect P111 from the high-voltage power supply. Connect the multimeter between connector pins P17-1 (+24 V) and P11-2 (GND) on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

2i

Connect the printer to a computer and place a sheet of paper on the manual feed or multipurpose tray. Connect the multimeter between connector pins P17-2 (+24 V) and P11-2 (GND) on the DC controller board. Select Manual Feed and print a page. Does the voltage drop from +24 VDC to 0 VDC when the manual feed pickup solenoid is actuated?

No Yes

Replace the manual feed pickup solenoid.

Replace the DC controller board.

Table 29. No Paper Pickup From Cassette

Step

Check

Result

Action

i

Is connector P13 on the DC controller board making good contact?

No

Reconnect P13 to the DC controller board.

2

Is connector P115 on the cassette feeder board making good contact?

No

Reconnect P115 to the cassette feeder board.

S

Is cassette feed solenoid connector P202 securely connected to the cassette feeder board?

No

Reconnect P202 to the cassette feeder board.

No Paper Pickup From Cassette (Continued)

Step

Check

Result

Action

4

Is cassette pickup solenoid connector P201 securely connected to the cassette feeder board?

No

Reconnect P201 to the cassette feeder board.

5

Remove the paper cassette tray. Visually inspect the paper sensing arm. Does the paper sensing arm appear to be damaged?

Yes

Replace the paper sensing arm.

6

Prepare the printer for troubleshooting as described in the "Troubleshooting Preparation" section.

Switch off the printer. Connect the multimeter between P13-7 (+24 V) and P13-8 (/TURN1). Does the resistance measure between 220 and 240 Ü. ?

No

Replace the cassette pickup solenoid.

7

Connect the multimeter between P13010 (+24 V) and P13-11 (/FEED1). Does the resistance measure between 110 and 130 Ü. ?

No

Replace the cassette feed solenoid.

8

If only one paper cassette is installed, connect a multimeter between connector pins P13-1 (NO PAPER1) and P13-4 (GND) on the DC controller board. While you remove and insert a paper cassette tray filled with paper, does the voltage toggle from 0 VDC (inserted) to +5 VDC (removed)?

No

Replace the cassette feeder board. If the problem persists, replace the cassette feeder tray.

No Paper Pickup From Cassette (Continued)

Step

Check

Result

Action

9

Replace the DC controller board. Does the problem still occur?

No

Problem solved.

10

If an optional paper cassette is installed, connect a multimeter between connector pins P13-3 (NO PAPER2) and P13-4 (GND) on the DC controller board. While you remove and insert a paper cassette tray filled with paper, does the voltage toggle from 0 VDC (inserted) to +5 VDC (removed)?

No

Replace the cassette feeder board. If the problem persists, replace the expansion feeder cable.

Table 30. No Paper Pickup From Manual Feed or Multipurpose Tray

Step

Check

Result

Action

1

Is connector P17 on the DC controller board making good contact?

No

Reconnect P17 to the DC controller board.

2

Is connector P16 on the DC controller board making good contact?

No

Reconnect P16 to the DC controller board.

3

Disconnect connector P111 from the high-voltage power supply. Disconnect connector P16 from the DC controller board. Connect the multimeter between connector pins p16-7 (PULLUP 5 V) and P16-8 (GND). Does the voltage measure +5 VDC when you switch on the power?

No

Go to Table 12, Power Supply Failure (+5 VDC).

No Paper Pickup From Manual Feed or Multipurpose Tray (Continued)

Step

Check

Result

Action

4

Connect the multimeter between connector pins P16-9 (No Paper) and P16-8 (GND). Does the voltage measure +5 VDC when you switch on the power?

No

Replace the DC controller board.

5

Connect the multimeter between connector pins p16-9 (No Paper) and P16-8 (GND). Does the voltage drop from +5 VDC to 0 VDC when you place a sheet of paper on the manual feed tray?

No

Replace the manual feed sensor. If the problem persists, replace the manual feed sensor cable.

6

Connect the multimeter between connector pins P17-1 (24 V) and P11-2 (GND) on the DC controller board. Does the voltage measure +24 VDC when you switch on the printer?

No

Go to Table 11, Power Supply Failure (+24 VDC).

7

Switch off the printer. Connect a multimeter between pins P17-1 (24 V) and P17-2 (/FEED). Does the resistance measure between 210 and 230 Q. ?

No Yes

Replace the manual feed pickup solenoid.

Replace the DC controller board.

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