MPC 2500 Laser Synchronizing detector board

[johnny32]

I have a faulty Laser Synchronizing detector board (LSD) in a laser unit of a MPC 2500.
Does anbody or has anybody managed to order an LSD board individually.The Parts manual gives the impression that I have to order the complete Laser Unit Assembley, (which is extremley expensive). Any thoughts???????

[Jomama46]

B238-5144 is the detector pwb in the C3500 parts manual and B238 is the assy for the C2500. I would bet that they are the same board.

[TonerMunkeh]

I've just read over the MB (MB230041) that covers this and it's kind of confusing.

Old Part Number: B2385144 New Part Number: B2235144 PCB:SYNC DETECTOR BOARD:LENGTHWISE
Old Part Number: B2235144 New Part Number: B2235146 PCB:SYNC DETECTOR BOARD:LENGTHWISE

It seems to suggest the B238 board is now from the B223 machine, however the B223 board is a different part number? Unless, the B223 5146 fits both, but why not just say that?

[Lotec]

I have tried to change the LSD in two machines. Both ended up needing a new laser unit/house. The error code just contiuned to come.

[tcs04]

I have a faulty Laser Synchronizing detector board (LSD) in a laser unit of a MPC 2500.
Does anbody or has anybody managed to order an LSD board individually.The Parts manual gives the impression that I have to order the complete Laser Unit Assembley, (which is extremley expensive). Any thoughts???????

Is it throwing a code??

[fotocom]

its throwing up an sc222 for yellow laser sync detector. Printed out the smc data and as well as the sc222 which is shown it has a sc241 at the same reading which is or laser driver board.To check out the laser driver i swopped it with magenta as they are the same part no. and still recieved an sc 222 but when smcs were printed out again the sc241 had changed to an sc 243 so it looks as though i might have two problems or are they related as the laser sync detector board is the same for both yellow and magenta

[tcs04]

its throwing up an sc222 for yellow laser sync detector. Printed out the smc data and as well as the sc222 which is shown it has a sc241 at the same reading which is or laser driver board.To check out the laser driver i swopped it with magenta as they are the same part no. and still recieved an sc 222 but when smcs were printed out again the sc241 had changed to an sc 243 so it looks as though i might have two problems or are they related as the laser sync detector board is the same for both yellow and magenta

I had a VERY similar fault a few months ago on an MPC2050 and it turned out to be a power supply problem. I will check the notes I made and advise. Is the machine set to colour as default? try setting to black and white and see if the code changes to that for a black laser sync error.
...............................Update............. ..................

Checked my notes and I was getting SC230 / 232 (Line position?) BUT it WAS a failure of +5v VLD (Ld = Laser diode?) on the psu... I would check that as the MPC2050 has more than one PSU so the fault may not display the same way.

[Lotec]

Have anybody ever changed the laser sync detectors with success

We have tried several times (and it is always the yellow), and we have no success. We either change the laser unit or we send the machine back to Ricoh. If the machine is newer than 1 year it is covered under warranty.

If the machine is sold to a company they get 1 year warranty. If it is sold to a private individual, they get 5 years warranty (here in Norway). So we try to get longer warranty from Ricoh on these units, because they are expensive.
I've had the sync detector problem a few times - and it was just a mirror/lense inside the laser unit that was not in the right place.
But if that is not the case, we've never had any success when we have replaced only the sync detector(s).

I have now placed a defective laser unit to the physics lab at a few local schools. They just digg these units. They show the students some practical uses of physics.. . flashback from school .. Snell's law

220px-Snells_law2.svg.jpg

[tcs04]

Have anybody ever changed the laser sync detectors with success

We have tried several times (and it is always the yellow), and we have no success. We either change the laser unit or we send the machine back to Ricoh. If the machine is newer than 1 year it is covered under warranty.

If the machine is sold to a company they get 1 year warranty. If it is sold to a private individual, they get 5 years warranty (here in Norway). So we try to get longer warranty from Ricoh on these units, because they are expensive.
I've had the sync detector problem a few times - and it was just a mirror/lense inside the laser unit that was not in the right place.
But if that is not the case, we've never had any success when we have replaced only the sync detector(s).

I have now placed a defective laser unit to the physics lab at a few local schools. They just digg these units. They show the students some practical uses of physics.. . flashback from school .. Snell's law

[ATTACH=CONFIG]6612[/ATTACH]

AAAHHHHH refraction!

[tcs04]

"Have anybody ever changed the laser sync detectors with success".....

I think you get the Yellow code because that's the first one checked! (In full colour mode) ... In Black and White mode you would get the related code.

[verderacer]

I have replaced them with success but have never had a sync detector problem on these color units yet.

What I am wondering is are you having any problems with cyan??? Cyan and Yellow use the same laser and detector boards for start and finish.

Also have you tried doing a Auto LPA? If it fails then try doing a manual one by running a Forced (SP2-111-001 to -003) but follow the procedure for doing the LPA in the proper order.

[Lotec]

I'll do that the next time we get a problem with a machine (we have had this problem on the MPC 2050 and 2500 - not 2800 and 4000).
The machines have never showed us a code for cyan - just the yellow one.

We have managed to fix a few by setting mirrors inside the laser unit in place. We have called it shaken copier syndrome :-) because we think the problem is because of rough handling of the copier during transportation . .