MPC4000 light copy on color copier/printing

[greyfox]

hello,
i replaced a new 4 sets of PCU with new development unit (C,M,Y,K) in mpc4000 i set first the manual PCU replacement from 0 to 1, and i also do the force line adjustment mode c & mode a, but it appear failed?? so i decided to go on auto color calibration and suddenly the only thing you can see in the calibration is black and magenta the cyan and yellow are faded (blurred), i check & cleaned the laser unit, wipe the target glass, replaced the image transfer belt but still nothing happen.... can anyone help me in my problem? thanks

[E Winter]

How does the image on the transfer belt before and after the paper transfer looks like (interrupt printing if the paper crosses the transferroller)? If the line position is way out of spec because of previous problems the machine often won't correct this without any help via sp mode - I don't have the exact procedure in mind but there should be a chapter inside the sevice manual for that issue - I guess that a/b mode thingy was quite ok to perform. Of course you'll need to restore the image density and clean the line positioning sensors first so the machine is able to read it's patterns.

But like I said it's importand to encircle the light density issue. If you can see that the density is low even on the ITB before paper transfer you may check the density on the drums.

Toner/pumps etc. shouldn't be the issue if you got that issue right after swapping the whole PCUs including dev (with should come with the right toner/dev concentration).

Keep us posted pls

[BLADE]

laser shutter / firmware

[Fearless V K]

laser shutter / firmware

Just remove the shutter.
If that's not it. Memory clear (upload NVRAM to SD card 1st)

[greyfox]

Sir it is possible to update the firmware even when the machine still has a problem???

[greyfox]

@jam sommer, sir i already clean the image density sensor, i try also the T D sensor iniatialization and Force toner execution, sir i attached the sample copy of Auto color calibration, i hope this will help...
thanks...

[theage]

Hi there,

Looks like the Image transfer section does not change the position from Black to Color mode. Check the Image transfer unit is coming up and down in Output check.

Greetings

[Fearless V K]

Just remove the shutter.
If that's not it. Memory clear (upload NVRAM to SD card 1st)

Have you tried a memory clear? It's worth a shot.

[greyfox]

sir, i tried (memory clear:all) but havent try to upload NVRAM to SD card

[Fearless V K]

sir, i tried (memory clear:all) but havent try to upload NVRAM to SD card

You upload NVRAM before a memory clear so you don't have to re-enter the multitude of SP data manually afterward.

[spaceman99]

Powerpack High voltage pcb causes this error. try changing that....