Error code sc45-20 konica 8050 need help now.

[impimp329]

I tried evrything to get rid of this code. Cleaned everything, sensors & nothing seems to help.. I tried to do a color register adjustment & got ERROR 2. Thanks in advance to all replies.

[jma676]

Konica Minolta Bizhub Pro C500 (& 8050) Error SC-F4520

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Description: C45-20 occurs

Cause:Abnormal termination of color registration control.

1. Normal registration mark is not made on the transfer belt, The sensor can not read it because registration mark is not made correctly on the transfer belt.

Defective parts:(Transfer belt, Drum, Developer, Developing Unit,etc).

2. Defective color registration sensor.

3. Defective printer control board.

4. Defective writing unit.
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Or contact a Qualified Technician.

[Coptech]

Did the transfer belt walk one of it's guide belts up onto the roller? That will make it fail color registration and give the code you mentioned.

[impimp329]

Did the transfer belt walk one of it's guide belts up onto the roller? That will make it fail color registration and give the code you mentioned.

I don't think so. I have 2 8050s on my floor & I swapped the transfer belt & nothing changed. I have read about switching the color register mode off in 25 mode then doing a color register in 36 but I can't get past shutting off for color register. Can someone please post these steps?

[Coptech]

The color registraion unit will come out with 2 screws and 1 connector if you have the tranfer belt unit removed. If you are swapping between two machines, I would consider trying to swap that. Are you sure that one of the shutters isn't sticking and staying shut or sticking open to where the sensor gets dirty front or rear?

[impimp329]

The color registraion unit will come out with 2 screws and 1 connector if you have the tranfer belt unit removed. If you are swapping between two machines, I would consider trying to swap that. Are you sure that one of the shutters isn't sticking and staying shut or sticking open to where the sensor gets dirty front or rear?

Coptech, thanks for the fast reply. I checked the shutters on the color registration unit & everything seems to be fine. Nothing is getting stuck. I will try to swap the units.

[impimp329]

Changed the color register units & got SC45-07. What now?????????? ANYBODY?????????????

[Coptech]

Do all colors print? Are dev gears stripped on any color?

This is what you mentioned earlier I believe.

Perform the color correction calibration of the sensors PS8 and PS9. To calibrate the sensors, perform the following:
a. Disable Color Registration Correction Control in the 25 mode, software dipswitch 25, bits 3 to 1 (ON) and bit 4 to 0 (OFF).
b. Run [Auto Color Registration Adjustment] in the 36 mode.
c. Enable Color Registration Control (software dipswitch 25, bits 3 to 0 (OFF) and bit 4 to 0 (OFF)).
d. Perform Auto Color Registration adjustment.

[impimp329]

I am not too clear on getting into the dipswitch to change the settings. I managed to get into the software settings but what do I set the first row, second row, etc

[impimp329]

Looked at the field man. & got into dipswitch 25 bits 3 to 1 on & 4 to 0 off
Ran the color register & came up ERROR2
VIEWD LIST & everything (yellow, magenta, cyan) all set to +312.5

[Coptech]

45-20 is color registration failure. To do this, it creates and developes 7's and backward 7's on both far sides of the transfer belt. It then uses the sensors that are under the shutters to read the timing and angularity of both sides for each color. If the belt is off track, it will mis-read and code. If the sensors are covered, it wil not read and code. If the belt does not turn right, same thing. If you have something that keeps one of the colors from deleloping be it a bad corona, development unit, drum, to whatever, it will code. Have your tech go into 36 mode and run each color one at a time with full laser power and others off to make sure each color is full across the page. If that is ok, and you have already tried the belt unit and the sensor unit, it will narrow down pretty fast. I don't know what else to tell you.

[impimp329]

Coptech, I had a friend that knows the machine better than me & he said the developer is over its 100,000. It's density is around 88. When I ran the color register, I noticed lines on the belt for each color, except the black. Is there any way to increase the density of the black?. My tech is not anwering his phone & I have no other means. I called several (5 ) companies & all said that there would be a $300.00 to $400.00 to check over the entire machine.

[Coptech]

If there is no black at all, I am betting that the development unit for the black has a stripped gear or no developer in it. I think you are down to deciding if the machine is worth that repair charge to you. It is time to let the service company earn their keep on this one. If the development unit is bad and it needs black developer as well, (and it will as the new units are empty when received) It will cost substantially more than the estimates you were given. Be prepared.

[RRodgers]

I hope for your sake it's only a stripped gear in the dev unit, but they usually strip cuz the unit is leaking and on it's way out. You can get away with just replacing the gear (if that's only it) but.... it won't last long. Replace the unit along with the dev in it. If you would have put your location in and we were close to you I would offer to come out and fix it.

[impimp329]

Coptech, RRodgers, thanks for the advice.. I checked the gears in the black developer & everything is o.k. I am getting in new black developer & will try to make that work. It had a pm count of 133,000+. I hope this works. Again, thanks. By the way, my shop is out in Chicago. I just ventured into the digital world & if this were a press, I would have no problems fixing it.