MP C4503 sc324-05

[jrob416]

Working with a MP C 4503 that continues to give the sc324-05. This tells me the color developer drive unit is locking. There appears to be 2 motors for the developer units. 1 for K and 1 for the CMY. Anyone come across this before? Are there drive clutches for the color units? The developer boxes turn easily by hand, and the units spin up when machine is powered on. Copier will print and copy in black, but when asked to print in color, gives code.

[slimslob]

Re: MP C4503 sc324-05

A motor lock error does not mean the motor is locking. It means the the motor is not able to achieve the proper constant speed, ie speed lock. Could be the motor, a bind in the gear train or a bind in a development unit.

[FrohnB]

Re: MP C4503 sc324-05

Gotta be that one of those color dev. units is bound up (even though you say they spin freely). Generally that's where we get this code from. Has the machine been sitting in storage for a while? Does it make any whining/grinding type noises? Have seen where development unit gears don't get put back on during re-assembly. Have also seen the development gear (on rear frame of machine) broken. Usually though, it's one of the development units being at fault. What are the counts on dev. units?

[JDYAL]

Re: MP C4503 sc324-05

There is a TSB for this problem. It basically says its due to improper transportation and to rotate the gears to agitate the developer. Not sure if this is relevant to your problem. Just letting you know.

[anothertech]

Re: MP C4503 sc324-05

There is a TSB for this problem. It basically says its due to improper transportation and to rotate the gears to agitate the developer. Not sure if this is relevant to your problem. Just letting you know.

Here is the TSB.SC324.pdf

[jrob416]

Re: MP C4503 sc324-05

Here is the TSB.[ATTACH]42188[/ATTACH]

[anothertech]

Re: MP C4503 sc324-05

Thats great that you have a machine to swap parts, I would try the motor that drives the units next.

[fshead]

Re: MP C4503 sc324-05

i am curious when turning the front white gears are they turning the mag roller too?
if so one should only turn one direction..

[jrob416]

Re: MP C4503 sc324-05

Thats great that you have a machine to swap parts, I would try the motor that drives the units next.

I swapped the entire developer/drum drive unit and now have a happy machine and customer. Not sure what part in the D.U. is bad. I will save that tear down for a slow day. Thanks to everyone who made a contribution, it is always helpful.

[copytech,mike]

Re: MP C4503 sc324-05

I swapped the entire developer/drum drive unit and now have a happy machine and customer. Not sure what part in the D.U. is bad. I will save that tear down for a slow day. Thanks to everyone who made a contribution, it is always helpful.

Did you replace the drum/dev unit itself or a drive unit in back of the machine?

[tsbservice]

Re: MP C4503 sc324-05

Did you replace the drum/dev unit itself or a drive unit in back of the machine?

5 years old...you should be really proud of your comment 🤣

[copytech,mike]

Re: MP C4503 sc324-05

5 years old...you should be really proud of your comment 🤣

And you should be booted from copytech.

[anothertech]

Re: MP C4503 sc324-05

Mike, the guy had already tried the drum/dev units (PCDU's). Then he swapped the drive unit in the back of the machine, that got them running.

[copytech,mike]

Re: MP C4503 sc324-05

Mike, the guy had already tried the drum/dev units (PCDU's). Then he swapped the drive unit in the back of the machine, that got them running.

Ok thanks on this. Appreciate it.

[slimslob]

Re: MP C4503 sc324-05

And you should be booted from copytech.

Judging by the number of RED cards you have it would appear that you are the one who needs to be gone. But don't worry, your rudeness has been reported.