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2-132 Service Manual

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Operator panel display all diamonds, no beeps

Operator panel display all diamonds, five beeps

Print quality service check

Note: This symptom may require replacement of one or more CRUs (Customer Replaceable Units) designated

as supplies or maintenance items, which are the responsibility of the customer. With the customer's permission,

you may need to install a developer (toner) cartridge or photoconductor unit.

Service tip: Before troubleshooting any print quality problems, do the following:

1. Print a menu settings page, and then check the life status of all supplies. Any supplies that are low should

be replaced.

Note: Be sure and keep the original menu page to restore the customer's custom settings if needed.

2. On the menu page, make sure the following is set to the default level:

– Color Correction: Set to Auto.

– Print Resolution: Set to 1200 dpi (print quality problems should be checked at different resolution

settings).

– Toner Darkness: Set to 4 (default).

– Color Saver: Set to OFF.

– RGB Brightness, RGB Contrast, RGB Saturation: Set to 0.

– Color Balance: Select Reset Defaults to zero out all colors.

– Check the paper type, texture and weight settings against what is loaded in the printer.

Once the printer has been restored to its default levels, do the following:

3. Inspect the transfer module for damage. Replace if damaged.

4. Inspect the photoconductor units and toner cartridges for damage. Replace if damaged.

5. If paper other than 20 lb plain letter/A4 paper is being used, load 20 lb plain letter/A4 and print the Print

Quality pages to see if the problem remains.

Step Questions / actions Yes No

1 Check the operator panel assembly cable.

Is the cable damaged?

Replace the top access

cover assembly. See “Top

access cover assembly

removal” on page 4-40.

Go to step 2.

Measure the voltage between JOPP1 pin 2

and ground on the system board.

Is the voltage approximately +5 V dc?

Replace the operator panel

assembly. See “Operator

panel assembly removal”

on page 4-24.

Replace the system board.

See “System board

removal” on page 4-153.