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Konica 7022 F-26-3 L detect 0004

I have a copier that went a little bit over the 100k with the original parts about 170k.

I cleaned it and after i changed the developer, developer sensor , drum , cleaning blade for drum and fuser it gets stuck at L-detect with 0004 and if i start it up it gives me an error like F-26-3.
I tried to reopen the drum and check if there are any other visible problems but there was nothing that seem to be bad in it.

If anyone has any kind of ideas please feel free and share them.

Thank you all.

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  • smdb Oct 06, 2008

    The copier has those exact parts in it , the blade seems to be in perfect shape(is new also).
    The problem is that before I changed the developer and the drum, blade and the fuser the copier went into a f-26-3 because i started it up without the fuser, I know how can you forget but in the same time i do tech support so you can imagine that my life is not that easy. With the old and the new fuser i get the same type of errrors


  • smdb Oct 06, 2008

    Thank you for your answer, I type it in and it didn' t show up on my other post

  • spyj2002 Nov 26, 2008

    when i switch on my konica 7022 photocopier,it gives me an error message that i should adjust L detect.

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Few things you want to check,could be your blade flpped,check TDS sensor wiring.
toner supply pound up preventing from adding to developer.or developer is bad or the wrong one
TDS part # 26na88040
toner supply part # 26wa-3200
developer # pcua -950254
hope that helps

Posted on Oct 06, 2008

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Details Subject:
Background, overtoning, and/or F26-x codes.
Description:
Background, overtoning, and/or F26-x codes.
Solution:
PROBABLE CAUSES:
1. Overtoned developer.
Install fresh developer (PCUA 950237) and run the L-detect adjustment. To run the L-detect adjustment, perform the following:
a. Enter the 36 mode (power the copier ON while pressing the 3 and 6 keys).
b. Press [1. HV adjustment].
c. Press [Next] several times until the display reads [HV adj (L detection adj)].
d. Press [Start].
e. When the adjustment is complete, the machine will stop and a value is displayed in [RESULT].
f. If the developer was sampled properly during the L-detect adjustment, the value displayed in [RESULT] will be in the 60-75 range.
g. If the L-detect adjustment [RESULT] value is outside of the 60-75 range, than the TDS (toner density sensor) should be checked.

2. Failed TDS (toner density sensor).
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a. Remove the IP unit (if an IP unit is installed).
b. Remove the rear and left rear side cover.
c. Remove the board cover/D (p/n 26NA73280) for access to the PRDB.
d. Enter the 36 mode (turn the machine ON, while pressing the 3 and 6 keys).
e. Select [1. HV adjustment].
f. Press [NEXT] several times until the display reads [HV adj. (Toner auto supply)].
g. Locate TP14 (TDS AN) in the middle of the PRDB above CN 25.
h. Using a voltmeter (20V DC range), place the red meter lead on TP14 and the black meter lead to frame ground.
i. Press the START button on the control panel.
j. The analog voltage reading on the volt meter during sampling should be (with properly toned developer) between 1.2 and 2.0VDC. If the voltage reaches 2.0VDC, M4 (toner addition motor) will turn on and add toner. When the toner auto supply adjustment is finished the voltage should read approximately 1.8VDC.
k. If the voltage reading is not within this range, replace the developer (PCUA 950237), TDS (p/n 26NA88040) and run the l-detect adjustment while monitoring TP14 on the PRDB.

3. Failed write unit (the TCSB monitors dot pattern patches created on the drum and adjusts the laser output for Maximum Power Control).
If developer has been replaced, L-detect run, the TDS voltage checks, and the developer is still overtoning (M4 continuously adds toner), replace the write unit (p/n 26NA-6503).

4. Clogged machine filters.
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Note: Information provided by Matthew Kennedy, Perry Corporation.
SPECIAL NOTE: Solution contribution by Don St. Onge, Workgroup/SSD

Attachments:this is additional information on f-26-2
and i have given you info on f-26-3
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