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HP LaserJet Quick Reference Service Manual Page 241

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Printer Will Not Access Service Mode
Service Note Number:
Serial Numbers Affected:
Associated Part Numbers:
Description:
have firmware that will not recognize depressed control panel keys
upon power-up. Therefore, there is no access to Service Mode,
Language Localization, or Cold Reset. This affects 110V and 220V
units with the #ABA English option.
Solution:
To order a patch SIMM, call HP Distribution at
(970) 339-7009 (U.S.) or (+31) 20 682-8291 (Europe).
Repeating 94mm Print Defect
Service Note Number:
Associated Part Numbers:
Situation:
Toner cartridges for the LaserJet 4V and 4MV products
could have a damaged print drum. Due to the design of the product, this
defect can be induced if the cartridge body is squeezed hard in the
middle. The defect can also occur if the cartridge is dropped (even if the
cartridge is still in the box).
The symptom will be one or two black or white dots that repeat every
94mm in the direction of the paper path. The dots will be located near
the center of a letter-sized page when viewed in a landscape
orientation.
Solution/Action:
should be returned to HP or an HP Authorized Service Center for
replacement. Cartridges beginning with lot code 4I28S* will not have
the potential to become damaged.
EN
C3141A-03A
Printers manufactured in the range shown above may
C3141A-05
Any toner cartridge that exhibits this defect
JPB0000000 - JPB9999999
C3141-60003 - patch SIMM
Toner cartridge: C3900A
Technical Tips – 239
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