AP4510 VSP 005

[xtega]

I have a Ricoh AP4510 that VSP value is 005 or 007 or 009, this value I understand that has to be about 040 but I can't adjust to this value.


VSG value is 401 (4V) and Vt Prev Copy (I think that this is the current voltage) is 409.

I've changed ID sensor, OPC Drum, Developer, Development unit (with TD sensor), IOB board, BICU board, Drawer Harness - Development, upgraded firmware and I've tried other NVRAM from other machine but it still fails, displaying SC390, SC391, SC350, SC990 and SC998 randomly.


I'm going to check the ID sensor cable extensor but it seems to be difficult because is in the deeper part of the machine and I can't view physicaly where It's connected (I think that it goes directly to the BICU board).


Now I'm waiting that Ricoh sends me a new NVRAM and a new toner hopper unit.
What else can I do?




(Sorry about my english, I'ts a little oxidized :P)

Greetings from Spain

[TonerMunkeh]

There's something else going on here. Take the back panel off the machine, take the HV board, the drum flywheel and the gear that sits behind the drum with the belt on it. Check that gear to see if the drive key has snapped. In the middle of the gear there's a little plastic lug that drives the drum. Check that before throwing any more parts at this.

[xtega]

Thanks for your answer TonerMunkeh.
I've checked the gear and the drive key and it's ok.

I think if it was the problem the drum won't rotate and printer wouldn't print correctly.

Any suggestion else?

[xtega]

Now I've changed the toner hopper unit and now the printer works fine but VSP value still keeps at 005.

I'm going to try a the new NVRAM...

I hope this works

[Jomama46]

005 (0.05) is just slightly overtoned. How does your print look?
You could test it by removing the toner and running a dozen very dark copies, Vsp should then rise to perhaps 100 (1.00) or so. You cant set Vsp, it is the result of reading a patch that the machine makes to judge when to add toner.
The patch is not applied each copy but either 10 or 50 copies. What is yours set for?
You can always clean the ID sensor then run 3001-2 to reset and read the result at 3003.

[xtega]

005 (0.05) is just slightly overtoned. How does your print look?
You could test it by removing the toner and running a dozen very dark copies, Vsp should then rise to perhaps 100 (1.00) or so. You cant set Vsp, it is the result of reading a patch that the machine makes to judge when to add toner.
The patch is not applied each copy but either 10 or 50 copies. What is yours set for?
You can always clean the ID sensor then run 3001-2 to reset and read the result at 3003.

Yes, I did this procedure, but the VSP value didn't change.

After changing NVRAM, VSP now is displaying newer values (ID sensor now really works) but the printer tends to be overtoned.
When I make again this procedure, printer works fine about 200 sheets, but it fails again displaying SC304 (before that, it prints 2 white sheets).

I've changed the charge roller and I'm going to change a new OPC drum. If it still fails I'll put a new developer...

P.S.: When I change the machine value in pixel count mode It doesn't display this SC

[TonerMunkeh]

I suppose it's possible the new dev unit has a bad TD sensor. Try one, while you're ordering parts order the ID sensor board and possibly a BICU board too (expensive I know).

[xtega]

I've changed the TD and ID sensor, I've changed the development case and the PCU unit, power supply, the high voltage board, upgraded firmware on the new nvram, BICU (2) and IOB (2) but the SC304 doesn't disappear.

Only thing that I didn't change were the printer wheels.

[Jomama46]

Jack up the serial number and stick a new machine under it.

[TonerMunkeh]

I think it's time you moved onto harnesses. Either that or burn the bastard.

[xtega]

Well, I've changed the printer wheels and it worked

I've changed all boards to an other printer, reseted nvram again, changed the charge roller and now it seems to work fine.

I hope this machine works for at least 2M copies more (or it wont be profitable xD)

Thanks a lot for your answers and sorry again about my english.

[tcs04]

Did you cover the toner entrance hole on the dev unit when fitting dev? if not. the machine may add toner to the unit during setup which can result in a very low VSP reading. the VT reading would show as normal.

Also, was there a lot of toner spilled BELOW the toner hopper and on top of the laser unit? If so, there may be toner on the laser diodes. this can cause SC320 / 990 codes as they are adjusted to their maximum. Check the laser power readings in SP mode. If they are up at about 62 - 54 you may need a new laser diode pcb.

[tcs04]

RULE#1

Read page 2 before posting!!!

[Jomama46]

If they are up at about 62 - 54 you may need a new laser diode pcb.

This is also an indication of defective door switches (above the fuser)

[tcs04]

Chicken or egg?

Door switches would be fried by blowing toner s a result of poor seals / VSP errors etc,

but I see where you're coming from.