Ricoh MP C4000 NO POWER!

[jonbonse]

I went to a Ricoh MP C4000 with no power today but could not get it going again.

On the power supply, fuse FU1 (8a 250v) was blown so I replaced with the same but it blew it out again!

In these cases I would normally replace the PSU but uncertain that it would be a good move as I have no circuit diagram for this machine.

I have the SM but cannot see the circuit diagram.

The customer tells me it is less than a year old so was wondering if this would be covered via Ricoh waranty?

Any advise on this kind of fault finding is appreciated.

John

[KenB]

The factory warranty is 90 days, at least last I knew.

[tcs04]

We did have an mp4500 blowning fuses due to a short in the wiring inside the right hand door.

[Eric1968]

I would remove all connectors from the PSU and check if the fuse still blows. If it doesn't blow the PSU should be OK.

[TonerMunkeh]

Change the PSU and the IH coil PSU as a pair. I've had a few do this and this, unfortunately, is the final fix.

[jonbonse]

Change the PSU and the IH coil PSU as a pair. I've had a few do this and this, unfortunately, is the final fix.

Thanks TonerMunkeh

Do you have part numbers for these?

The PSU and the IH PSU? What about the IH Coil?

[TonerMunkeh]

AZ24 0136 for the main PSU and the coil PSU is D029 5172. I've never had to change the coil itself.

[jonbonse]

AZ24 0136 for the main PSU and the coil PSU is D029 5172. I've never had to change the coil itself.

Thanks!

Is this also known as the IH Inverter?

[jonbonse]

Hi

Just an update:

I returned to investigate further and performed the following:

Unplugged all connectors on the PSU at the bottom rear of the copier and switched on. The fuse did not blow.

U plugged in all connectors one at a time and turning on after eCh one.

The fuse FU1 on the main PSU did not blow until I plugged in the cable which goes to the IH PCB.

I then unplugged it an switched on again and it powered up.

I then switched off and unplugged the black connector cn982 on the IH, powered up and it was ok.

The copier will blow FU1 on the main PSU only when this is connected...

I can't find any shorted wires any where even in the Fuser.

My guess is that the IH coil is shorting out somewhere?

I think the main PSU is ok?

What do you think?

[brodera]

Hi

Just an update:

I returned to investigate further and performed the following:

Unplugged all connectors on the PSU at the bottom rear of the copier and switched on. The fuse did not blow.

U plugged in all connectors one at a time and turning on after eCh one.

The fuse FU1 on the main PSU did not blow until I plugged in the cable which goes to the IH PCB.

I then unplugged it an switched on again and it powered up.

I then switched off and unplugged the black connector cn982 on the IH, powered up and it was ok.

The copier will blow FU1 on the main PSU only when this is connected...

I can't find any shorted wires any where even in the Fuser.

My guess is that the IH coil is shorting out somewhere?

I think the main PSU is ok?

What do you think?

This has hapend to me recently. Check the for *What do you call these* "Electrical spikes" '
You can try after the fuse-change plugg the powercontact in to a separate PSU Station..

[jonbonse]

AZ24 0136 for the main PSU and the coil PSU is D029 5172. I've never had to change the coil itself.

TonerMunkeh

I hear there is a Tech Bulletin for this kind of fault (RTB 029051 ). .. . . . I dont suppose you have it so I could take a look?

Also I hear you have to replace the Main PSU, IH Inverter and IH Coil to completely cure this fault?. . . . .

My manual doesn't list the IH Coil so was hoping you could give that too?

Thanks for all your help!

[teebee1234]

RTB No.: RD029051 :
IH invertor improvement
Details<Symptom>
Fuse on PSU can brow out at the following timing.
- Main switch ON
- Front door or duplex unit close
Answer
Old part number D0295172
New part number D0295173
Change
A capacitor on IH invertor has been changed.
Reason
The following issue can occur.
<Symptom>
Fuse on PSU can brow out at the following timing.
- Main switch ON
- Front door or duplex unit close

<Cause>
A broken element device on IH invertor.
Temporary blackout can cause over voltage. As the result, it causes the element to break.

<Solution>
Action required at the field
Change IH invertor.

[mabawser]

Had the IH inverter board cause this to blow on numerous occasions, fit a new fuse to the power supply and order up the inverter board and fit this and you should be ok.