HP LaserJet Quick Reference Service Manual Page 55

Volume i.
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55 Error (internal communication
problem)
All Printers
The cable is loose or bad.
The DC controller PCA is defective.
– Replace the DC controller PCA. Note: Error 55 on a LJ Series II
requires replacing both the DC controller and the Interface PCA
at the same time.
The formatter PCA is defective.
The paper input PCA is defective.
The main motor is defective.
There is inadequate site power (or the problem may be the result of
thunderstorms). Examine the surge protector.
– Replace the DC controller PCA and/or the formatter PCA if
necessary.
4V
The laser scanner assembly is defective.
4Si, IIISi
The connectors are improperly fitted.
– Check and reseat the connectors J4 and J5 on the low-voltage
power supply. Check J8, J9, J10, and J15 on the DC controller
PCA
Cable is loose or faulty.
– Check and reseat the cable between the DC controller and
formatter PCAs.
The DC controller is defective.
The DC power supply is defective.
The formatter PCA is defective.
The paper input PCA is defective.
The main motor is defective.
EN
Error Codes – 53
1

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