Question about Ricoh Aficio AP3800C Laser Printer

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Smearned Printing on Ricoh Aficio AP3800C Laser Printer

Hi, I work for a non-profit here in Tucson Arizona and we were recently donated a Ricoh ap3800c color laser printer. The printer worked fine for a while(1 month) but then it started giving a add black toner error even though the toner was full.
This was problem was resolved by cleaning the insides of the machine with compressed air. However after another week of use the machine suddenly started printing smeared pages and it no longer printed in black. The only colors that showed on a page were cyan, magenta and yellow.

After contacting ricoh tech support they said we needed to replace the black development unit, and so we did. Unfortunately this did not solve the problem.

Just to recap here are the main problems.

1. Pages print smeared

2. It doesn't print the color black.

Sidenote: The machine occasionally gives an SC error(261 or 380 I'm not sure ). This is resolved by restarting the printer.

P.S I attached a picture of the test page to show the smearing and the lack of black.

Any help would be greatly appreciated!


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Hi there the smudges are most likely down to the black PCU (Drum Unit) and following are the reasons for the two fault caode you have given me.

SC 261 LD HP sensor
not switched
off (for K only)
After the laser beam pitch was
changed, it takes more than
five seconds for the HP sensor
to switch off.
• Defective motor
• Defective sensor
• Mechanical problem
when switching the
actuator
• Brown fuse (FU81) on
the Power supply unit
1. Turn the main switch off and on.
2. Check the sensor actuator position of
the LD positioning motor.
3. Replace the LD positioning motor.
4. Replace the LD home position
sensor.
5. Check and/or replace the PSU.

SC 380 Black
development
motor error
SC 381 Color
development
motor error
When the motor speed is
within the target level, the
motor sends a lock signal
(High to Low at CN214-5) to
the BCU.
SC380 is detected under the
following conditions:
• The Lock signal stays High
2 seconds after the motor
turns on.
• The Lock signal stays Low 2
seconds after the motor
turns off.
• The Lock signal stays High
for more than 2 seconds
while the motor is on.
• Defective motor
• Defective BCU
1. Turn the main switch off and on.
2. Replace the motor.
3. Replace the BCU.

Hope this is any help

Thanks J

Posted on Feb 21, 2008

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