bizhub c350 trouble reset

February 26, 2009

1.how to imaging unit reset:

the real life of drums and IUs is at least 100k - but chips are set to end at most 50k -good reason to reset it with chip reseter

2. how to reset transfer unit :

the real life of transfer unit is at least 300k

to reset use a 80 mA fuse fuse

2.foggy background and blurred text :

-remove waste box, remove trnsfer belt, remove all IUs and clean with alcohool LED bars- under IUs.

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bizhub 420 c2804 reset

February 25, 2009

Description:

Too low toner density(in developing unit) -read from ATDC sensor

Posible causes:

1.Defective toner supply mechanism - defective TONER CONVEYANCE GEAR p/n 26NA 3268 0

Solution: grease with silicone vaseline toner conv gear and worm gear (at Motor M4) or replace toner conv gear if broken

2. tubby noise -toner sub hooper overflow -use vaccum cleaner -clean all toner inside hooper

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bizhub 420 c2403

February 25, 2009

Trouble code:

C2403 (C-2403).

PROBABLE CAUSES:

1. When an empty toner bottle is rotated while removing it from the machine, the alignment tab goes out of home position. Then, when a new bottle is

inserted, it does not insert correctly and it does not rotate —pull out and insert it correctly —Push again(until clack) toner bottle after insert it.

2. Toner sensor position ps28 contaminated with toner— use vaccum cleaner and clean all parts around toner bottle esspecially ps28.

3.Defective toner bottle

3.Defective toner rotate mechanism claws

toner-claw

Note : To reset C-2403 after replacing the toner bottle, perform the following:

a. Power OFF main SW, inside front door.

b. Slide the toner bottle cradle and remove spent toner bottle.

c. Prepare new toner bottle per instructions and place toner bottle in the cradle (line up the two notches at the rear so the cartridge is laying level in the

cradle).

d. Turn bottle completely around and line up the arrow at the 12 o’clock position clockwise or counterclockwise and push cradle in and lock toner door.

e. The power should be re-enabled to ON while holding the Utility key; the Konica Minolta blue screen within 2 minutes, then the white screen with Trouble

Reset. Touch and OK will appear. f. Power OFF/ON and should go to Ready. This procedure may have to be redone several times.

2. Toner bottle is not turning.

Ensure that the toner bottle does not have any manufacturing defects. Also ensure that the pressure spring inside the pressure assembly (p/n 26TA-3332) is

applying sufficient pressure when locked into place.

3. Excessive pressure from the Toner Bottle Door.

Remove the two pressure springs located in toner door.

4. The toner bottle position sensor (PS28) may have shifted when the drive section on the back of the machine was removed or installed. As a result, PS28

cannot detect rotation of the toner bottle.

Install a new mounting plate (p/n 50GA33161E) and stopper seal (p/n 447042481) for PS28. These parts prevent PS28 from becoming dislodged. Complete

5. Contact between parts around the bottle guide section.

Please install the Toner supply auxiliary cover countermeasure as explained in the attached Parts Modification Notice.

6. If toner bottle is not installed correctly and the customer forces it then it may cause tearing of the drive tabs on the toner bottle. This will cause the bottle

not find the home position generating this error.

Please ensure that the toner bottle is inserted correctly.

7. Even though the correct procedure was used p, there still may be burrson theflange tips at neck of the toner bottle.Also,PS4

and PS28 may not be sensing properly.

Verify the correct operation of PS4 and PS28. Check for burrson theflange tips at neck of the toner bottle. Remove the burrs on the

toner bottle.

Note : The service documentation does not include a procedure for checking PS4 (Toner Bottle Sensor) and the PS28 (Toner Bottle Position Sensor). To

check:

a. Enter the State Confirm mode=>’Service Mode screen’; press [State Confirmation].

b.’State Confirmation screen’; press [Sensor check].

c. ‘Sensor Check screen’; press [Check Code] and, when entering the sensor check code in 3-digit format through the copy count setting button, a state

(ON/OFF) or value is displayed in the Result area.

d. For the multi-mode, press [Multi Code] and enter a three-digit multi-code through the copy count setting key. When conducting the sensor check of other

signal sources, repeat stepscand d.

IMPORTANT : Code 57, multi-mode 2, which is not listed in the bizhub 420/500 Service Manual, is used to monitor the output signals ofPS4 (Toner Bottle

Sensor), and multi-mode 3 for monitoring the output signal ofPS28 (Toner Bottle Position Sensor). These sensors are located at the rear of the hopper

assembly at the 11 o’clock position forPS28 and at the 12 o’clock position forPS4. The state of these sensors will switch from 0 to 1 if the bottle is moved.

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