MP402 white lines

[copyaction]

MP402 with white lines.
Replaced new drum unit.
Using genuine Ricoh toner.
I believe the customer was running labels but I can’t find anything stuck where I can see.

[TonerMunkeh]

Has the LED head been cleaned? If not a couple of emitters on it could have been fried.

[slimslob]

Has the LED head been cleaned? If not a couple of emitters on it could have been fried.

Or covered with toner or dust.

[Polarbear]

Agreed.

Remove the whole pcu.

Press the blue lever on the side so the prinheaf lowers into the cavity.

Gently wipe with soft cloth.

Gently release blue lever to home print head.

Reinstall pcu assembly, close front cover and test

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[luca72]

MP402 with white lines.
Replaced new drum unit.
Using genuine Ricoh toner.
I believe the customer was running labels but I can’t find anything stuck where I can see.

dirty led array, or some dead led.

[Drivee]

I think same.. maybe even OPC is defective or some hair, dirt between laser and OPC.....