mp2550 sc391

[ponto700]

Hi,g
i bouhht one mp2550 and was ok... now when i try to make copies it gives me sc391. i already change power pack and i try other pcus and problem still the same. i reset machine (5801) and when i turn on is ok but when i try to make copy or print counter paper comes out from paper tray and jams and apears sc391.
i already clean contacts from machine to pcu and still gives me same problem.
Any ideia!?

thanks in advance

[DRichard]

Re: mp2550 sc391

Hi,g
i bouhht one mp2550 and was ok... now when i try to make copies it gives me sc391. i already change power pack and i try other pcus and problem still the same. i reset machine (5801) and when i turn on is ok but when i try to make copy or print counter paper comes out from paper tray and jams and apears sc391.
i already clean contacts from machine to pcu and still gives me same problem.
Any ideia!?

thanks in advance

"A development bias leak
signal is detected."

Poor connection at the PCU bias
terminal
(or) High voltage supply board defective

[ponto700]

Re: mp2550 sc391

"A development bias leak
signal is detected."

Poor connection at the PCU bias
terminal
(or) High voltage supply board defective

Hi,

all contacts are clean and i already also clean again with contact cleaner... high voltage supply board also changed and still giving same problem. i took out from working machine. when i put pcu and i try to inicialize dev it starts and then stop giving again sc391.

[slimslob]

Re: mp2550 sc391

SC 391 has to do with development bias not drum charge. If I remember correctly, development bias is applied through the development roller drive. Applied from the power pack to a contact on the gear box through Harness:High Voltage Line:B:R-C, item #10 on the Drive Section 4 page of the parts catalog. Check continuity from the harness to the shaft that drives the development roller. Also check for leakage to ground.

[ponto700]

Re: mp2550 sc391

SC 391 has to do with development bias not drum charge. If I remember correctly, development bias is applied through the development roller drive. Applied from the power pack to a contact on the gear box through Harness:High Voltage Line:B:R-C, item #10 on the Drive Section 4 page of the parts catalog. Check continuity from the harness to the shaft that drives the development roller. Also check for leakage to ground.

After check all conections i found the problem... this piece was glueded and was not making contact. after change it problem solved. Thanks a lot for help.

[kannuki2]

Re: mp2550 sc391

After check all conections i found the problem... this piece was glueded and was not making contact. after change it problem solved. Thanks a lot for help.

Wow, do you have the part # for that piece?