Ricoh MPC 2000 - printing bad copies.

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

If there is no toner entering the tube the problem could be the nozzle assembly on the back of the toner hopper assembly PN B2233205.

noted, will have a check on the nozzle as well

[Oze]

Re: Ricoh MPC 2000 - printing bad copies.

Just to clarify...
Does the machine tell you "Independent toner supply" on the screen or is the machine still trying to load toner...with the Load Toner message on the screen?

[Oze]

Re: Ricoh MPC 2000 - printing bad copies.

noted, will have a check on the nozzle as well

If you changed just the pump and NOT the hose you may have a toner nugget blocking it.
Try and vacuum out the hose from the pump side...leave it attached to the machine but pull it away from the pump and vacuum the hose or replace it if that fails.
The pump comes with a new hose.

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

Just to clarify...
Does the machine tell you "Independent toner supply" on the screen or is the machine still trying to load toner...with the Load Toner message on the screen?

it says independent toner supply Oze.

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

If you changed just the pump and NOT the hose you may have a toner nugget blocking it.
Try and vacuum out the hose from the pump side...leave it attached to the machine but pull it away from the pump and vacuum the hose or replace it if that fails.
The pump comes with a new hose.

i took the entire pump unit off the machine, cleaned it outside. And the hose as well.

i still am not sure if the pump is faulty or some other part has failed.

appreciate your inputs on this.

will post back with progress again

[hossam]

Re: Ricoh MPC 2000 - printing bad copies.

Check the toner end sensor

[hossam]

Re: Ricoh MPC 2000 - printing bad copies.

Check the toner end sensor

attached

[skynetto]

Re: Ricoh MPC 2000 - printing bad copies.

Credit goes to someone on this forum (forgot who wrote it the first time...sorry)

Toner End Detection

[Cause]

1. Toner End Sensor(s) mounted between the toner bottle and attraction pump not seeing toner.
2. Clogged or defective Toner Supply mechanism
3. Abnormal readings from either of the TD sensors
4. Faulty NVRAM data

[Action]
To determine where the problem may be occurring you can check the following readings;
1. Check SP3044-001 (Toner Supply Mode) and check that it is set at 3 (default)if set at 1 or 2:

• If set at 1 this indicates a problem with the TD Sensor check SP7403-001 (SC History) to determine where fault may lie.
• If set at 2 this indicate a problem with the ID Sensor check SP7403-001 (SC History) to determine where fault may lie.
• If set at 3 proceed to next step

2. Check the Toner End Sensor with SP5803 - 035 (K) / 036(M) / 037(C) /0 38(Y) should read 0 with toner present and 1 with no toner present

• If SP for affected color reads 1 and no toner is present at the Toner End Sensor
  • Check that affected the Toner Bottle Clutch engages by watching the rotation of the Toner Bottle
  • If the Bottle Rotates check that the gearing and shutter open properly
  
  
• If SP for affected color reads 1 and toner is present
• Check and/or replace the Toner End Sensor
• check and/or replace the Toner End Sensor
• If SP for the affected color reads 0 and no toner is present

3. TD sensor check for VT Display in SP3201 numbers 001(B), 002(M), 003(C), 004(Y ).

• These values should be compared against VTREF Display SP3222 001(B), 002(M), 003(C), 004(Y ).
• Normally VT display should be slightly below (.1 to .2) then the VTREF value, the more VT is above VTREF the less toner is being seen in the developer unit, when VT is .5 above VTREF a Toner End Condition is indicated if Toner Near End has been detected first.
• If VT display is high open and close the front door to perform Toner End Recovery or try a forced toner feed SP3015 to add toner and lower VT.
• If VT remains high check the Toner Attraction Pump and/or the supply tube (may be clogged or crimped) .

4. If VT is below VTREF, the Toner End Sensor has toner and reads 0 in step 2, the Toner Cartridge has been changed, and the front door has been opened and closed or the machine cycled off and on, then there may be problem with the NVRAM try:

• Holding down the "./*" and # pound key for ten seconds to perform a soft reboot of the machine
• If the condition still persists perform SP5801-002 (Engine Memory clear)

[Oze]

Re: Ricoh MPC 2000 - printing bad copies.

SP 5051-001 set to OFF.
Reboot machine

[impetus73]

Re: Ricoh MPC 2000 - printing bad copies.

Is the black developer unit rotating the dev roller? Use your finger to make a "mark" in the developer on the roller, then start the machine, then take the dev unit out, and see if it rotated any. If not, you have a faulty developer drive clutch or gear. I had this same problem once.

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

Is the black developer unit rotating the dev roller? Use your finger to make a "mark" in the developer on the roller, then start the machine, then take the dev unit out, and see if it rotated any. If not, you have a faulty developer drive clutch or gear. I had this same problem once.

I have noticed that the developer unit is rotating.

Everything seems to be fine, yet something is wrong i feel.
Fuser 1.jpgfuser 2.jpgfuser 3.jpgthem 1.jpgtherm 2.jpg
i checked the fusing unit.Thermistor has 203 K to 200 K ohm when i checked for its continuity. And when i touch it, its value changes. it drops from 203 to 160 k ~ 170k

However, the thermistor fuser dint give me any values. I wonder if i am measuring it right.

Pics posted as well. Any inputs- appreciated.

are both thermistor and fuser okay? or you seniors suggest them to be replaced? or any other whacko ideas? let me know

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

I have noticed that the developer unit is rotating.

Everything seems to be fine, yet something is wrong i feel.
[ATTACH=CONFIG]29473[/ATTACH][ATTACH=CONFIG]29474[/ATTACH][ATTACH=CONFIG]29475[/ATTACH][ATTACH=CONFIG]29476[/ATTACH][ATTACH=CONFIG]29477[/ATTACH]
i checked the fusing unit.Thermistor has 203 K to 200 K ohm when i checked for its continuity. And when i touch it, its value changes. it drops from 203 to 160 k ~ 170k

However, the thermistor fuser dint give me any values. I wonder if i am measuring it right.

Pics posted as well. Any inputs- appreciated.

are both thermistor and fuser okay? or you seniors suggest them to be replaced? or any other whacko ideas? let me know

ANd i forgot to add, the range in the meter is in Mega Ohms, so each reading is in Kohm range. ( 201 K,206k,147k like that)

[impetus73]

Re: Ricoh MPC 2000 - printing bad copies.

What does the thermistor has to do with this problem? If it's the thermistor, you will get a SC554 or so.
To check a thermistor, you need to apply heat and cooling to the thermistor, to see the resistance increase or decrease.

It can be the charge power on the dev unit, and it can be the transferbelt unit that is failing due to a broken black power wire.
The wires there tends to corrode due to high voltage, arching and sparking, and they break with some green goo on the ends of the broken part.

Try swapping over a dev unit from another machine, and then the ITB unit if that fails.

if all fails, roll the machine out in the parking lot, put it on fire, and yell for it to die :-D At least you get some frustration out.

[pradeep.n]

Re: Ricoh MPC 2000 - printing bad copies.

What does the thermistor has to do with this problem? If it's the thermistor, you will get a SC554 or so.
To check a thermistor, you need to apply heat and cooling to the thermistor, to see the resistance increase or decrease.

It can be the charge power on the dev unit, and it can be the transferbelt unit that is failing due to a broken black power wire.
The wires there tends to corrode due to high voltage, arching and sparking, and they break with some green goo on the ends of the broken part.

Try swapping over a dev unit from another machine, and then the ITB unit if that fails.

if all fails, roll the machine out in the parking lot, put it on fire, and yell for it to die :-D At least you get some frustration out.

it also gave me a SC565 hence did this bit as well. and about putting machine the on fire, customer might summon me later. :P

[slimslob]

Re: Ricoh MPC 2000 - printing bad copies.

SC 565 is usually something to do with the pressure temperature. Use your multi meter and check the pressure thermostat and pressure roller heater lamp. One of those is probably open. You will still have to deal with the print quality issue unless it was caused by bad fusing.