Ricoh MP 1900

[ecoworld]

Hi
I am having an issue with a Ricoh MP1900 machine. Initially it used to power on and display SC542 and switch off by itself. As the code refers to the fuser, I removed the fuser and checked the lamps are OK, removed the thermistors and cleaned it for toner deposits. After i put it back, it no longer powers on, no display , the power supply just makes a click noise, I presume for the relay and then dies.

I swapped with another fuser and the problem remains the same.

Any suggestions.

Thankks

[Polo-022]

Remove the fuser unit, check both thermistors for a short circuit to ground/chassis, then switch on.
If you see again the SC-5XX message, lucky you, if not, check power supply or a DC board...

[KeviM]

Hi

Like the previous tech mentioned if you swapped the fuser unit and you sure that the unit is working, then you need to look at the power supply unit. Alternatively... This is a long shot, try swapping the controller unit.

[Phil B.]

Hi
I am having an issue with a Ricoh MP1900 machine. Initially it used to power on and display SC542 and switch off by itself. As the code refers to the fuser, I removed the fuser and checked the lamps are OK, removed the thermistors and cleaned it for toner deposits. After i put it back, it no longer powers on, no display , the power supply just makes a click noise, I presume for the relay and then dies.

I swapped with another fuser and the problem remains the same.

Any suggestions.

Thankks

Did you clear the error in service mode after swapping the fuser?

Sent from my SM-G960U using Tapatalk

[davel]

Did you clear the error in service mode after swapping the fuser?

Sent from my SM-G960U using Tapatalk

If it won’t power up how can he enter SP mode. As others have said, probably blown PSU.

[TonerMunkeh]

The more alarming this is the OP said the machine switched on, displayed the SC, then switched off by itself?

Never seen a Kir do that.

[slimslob]

I have had shorted dc motors, solenoids and clutches take down the 24V power supply during engine initialization.