MP5000B with SC 221

[hthhus]

Hi everyone!
MP5000B SC 221 machine errors, please help me!
Thank verry much!

[Infidel]

I only have the description, not seen this before on that model, good luck!

Laser synchronizing detection error: start position LD1
The laser synchronizing detection signal for the start position of the LDB is
not output for two seconds after LDB unit turns on while the polygon motor is
rotating normally.

Worn out LD

Damaged LD harness

IPU defective

[katash]

copy data security unit is not set properly or not the right type,you can disable your authentification codes and switch your machine of and on,
gud luck

[verderacer]

I would think it's your sync detector board. On previous generations they would commonly go out...

[hthhus]

thanks everyone
I've read through the instructions, but still not fix it.
I phoned the supplier, they said, is because polygon motor, but in the encoding erros are reported as "SC221: Scan Length Error Detection".
What's Scan length?
Thank you verry much!
(Sorry about my English)

[teebee1234]

The scan length is the sweep across the drum of the laser beam (enabled by the rotating mirror). When the beam hits the sync detector, that lets the machine calculate the start timing of the laser. So an sc221 would indicate that the detector did not see the beam even though the mirror is rotating.
FYI, your english is fine...

[hthhus]

Thanks for help!
I can't fix it! Please help me!

[Leonh]

hi.what the manual says:

The laser synchronizing detection signal for the start position of the LDB [K] is not output for two seconds after LDB unit turns on while the polygon motor is

rotating normally.Have u tried replacing the ldb?

1. Check the connectors.
2. Replace the laser-synchronizing detector.
3. Replace the LDB.

4. Replace the BICU.

[hthhus]

Thanks everyone for the help!
After cleaning up the Optical box and replace the polygon motor, it was normal!
Expected to be used for a long time!

[phileaston]

Hi everyone!
MP5000B SC 221 machine errors, please help me!
Thank verry much!

HI you may only have a toner spill as the ld unit sits below the toner hopper I have had this problem before and I vacuumed out the laser section and it's bee ok since.

Regards
phil