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Hp p2055/p2035 engine controller unit repair

Hi everyone, 
I want to repair two engine controller unit board of hp p2055.
I have confirmed the problem that it is in this board. 

1. 52 scanner error
2. Black print issue (printer is in ready state) but prints only black. 

Can anybody help me with these two repairs. I have verified by testing the printers with different engine controller unit boards. 

A circuit diagram is also appreciated. 

Thanks in advance

Comments
2023, June 13 - 09:46
#517895
pika75
pika75 picture
11 years 3 months

Hi, the 52 scanner error meens that the laser unit needs to be replaced.
The black page print is caused by the poor electric contacts between toner cartridge and printer.
For the first moove, try an other toner cartridge.
Good luck!

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