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Konica 7025 I have a problem for my copier Konica 7025 i can not calibrate the Developer on HV simulation the message in LCD is F-26-3. Can you help me to solve this problem?

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  • Christopher Pielago
    Christopher Pielago Jul 17, 2008

    I install new DV Box Unit,TDC Sensor, Developer, Drum, Cleaner Blade in Konica 7025. the problem is disame F-26-3 the Developer can not calibrate i try all simulations i reset all the counter but still same problem. the problem is the machine wont calibrate the new Developer. is there other way to solve this problem? can you help me to solve this problem?




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The guest it correct. The TDC sensor controls the developer. They do go bad and should be replace if you can't get it to calibrate.

Posted on Aug 07, 2008


You have a toner detect problem.You will probably need to replace the TDC sensor in the developer unit.If you want you might be able to check the data control,mode 47-01&02.or 47-57 for the toner level power signal.

Posted on Jul 13, 2008


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Konica 7020

Did you blow it up, probably not.

Click this link for the everything.
  1. Choose the Category "Office Systems"
  2. Choose the model "7020"
  3. Click the error next to the Model dropdown box.
  4. Choose the 1876KB user manual called "User Manual for 7020, 7025, 7030 and 7035"
Or click on this link for the specific manual.

The error codes you seek are not in the manual, you'll have to call Konica to tell you what they are ... call Konica at (860) 683-2222.

Hope this helps. Rate a fixya!

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Sir/mam, you might have a bad drum density sensor or it was not cleaned or was destroyed by static electricity, if a vacuum cleaner was use to remove the old developer, NEVER use a vacuum cleaner for that procedure. Remove the drum and will see a small sensor near where the cleaning blade sits need to clean it replace it. Worse case the main control board is bad that what sensor talks to .Was the L Detect procedure run after the developer was replaced, and before you replaced the developer did you clear the developer counter, to let machine know it has new developer, because clearing the counter is the only way the copier has new developer, did you clear the counter for the new drum? The machine use the counters to determine voltages for certain assemblies. If L detect was not run and copies or prints where made get new developer and start over.

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Yes I stated what I recommended to do in your last post!

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remove the drum assy. and have the the drum and developer replaced along with having the drum and developer assy. cleaned and the senors that are on the assy, then have the proper procedures run after the developer and drum are installed, ALSO have the counters reset to let the copier know that new developer and drum have been replaced

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Konica 7022 F-26-3/2 L detect 0004 Konica 7022

Details Subject:
Background, overtoning, and/or F26-x codes.
Background, overtoning, and/or F26-x codes.
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).
To check the TDS, perform the following:
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.
Check all machine filters to verify they are not clogged. Clogged cooling fan filters prevent proper ventilation which can cause the adhesive on the write unit glass cleaner to melt due to high internal temperature, causing smears on the glass.
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
you should revue all the information
hope that helps

Oct 07, 2008 | Office Equipment & Supplies

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