Konica Minolta C6500 Machine Adjustments

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Field Service Ver.2.0 Mar. 2009

9.3 Machine adjustment

9.3.1 Restart Timing Adjustment (Printer Adjustment)

Adjust the image leading edge timing.This adjustment changes the restart timing of the registration roller to adjust the image position in sub-scanningdirection.

Note

• Be sure the "FD-mag. Adjustment (Printer Adjustment)" have been adjusted before performing this

adjustment.

(Refer to P.149)

A. Procedure

1. "Service Mode Menu screen"Press [01 Machine Adjustment].

2. "Machine Adjustment Menu screen"Press [01 Printer Adjustment].

3. "Printer Adjustment Menu screen"Press [01 Restart Timing Adjustment].

4. "Restart Timing Adjustment screen"Press [ ] or [ ] to select the item you want to adjust, and press [COPY].This adjustment can be per-formed for each feed tray (trays, ADU), paper size (large, small), and paper type (plain paper, thick paper).

Note

• Large size: 300 mm and more (sub-scanning direction)

• Small size: Less than 300 mm (sub-scanning direction)

• Thick paper: Paper weight 106 g/m2 and more

5. "Copy screen"Set the copy according to the item that has been adjusted and press the Start key to output a test pattern(No. 16).

6. Check the leading edge timing.Standard value 20 ± 0.5mm

7. When the value is not within the standard value, press the [SERVICE].

8. "Restart Timing Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -60 (shorter) to +60 (longer) 1 step = 0.1 mm

9. Repeat steps 4 to 8 until the standard value can be obtained.

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5501 9.3.2 Centering Adjustment (Printer Adjustment)

Adjust the image mis-centering in main scanning direction on the printer. This adjustment changes the laser writing start timing.

Note

• Be sure the "CD-mag. Adjustment (Printer Adjustment)" have been adjusted before performing

this adjustment.

(Refer to P.150)

A. Procedure



3. "Printer Adjustment Menu screen"Press [02 Centering Adjustment].

4. "Centering Adjustment screen"Press [ ] or [ ] to select the item you want to adjust, and press [COPY].This adjustment can be performed for each feed tray (trays, ADU), paper size (large, small, 81/2 x 51/2 (trays1 to 5) ), and paper type (plain paper, thick paper).

Note





6. Fold the output page in half in main scanning direction, and check the discrepancy from the center line ofthe print.Standard value 0 ± 1.5mm or less

7. When the value is not within the standard value, press [SERVICE].

8. "Centering Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -40 (image in back) to +40 (image in front) 1 step = 0.1 mm


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9.3.3 FD-Mag. Adjustment (Printer Adjustment)

Adjust the magnification in sub-scanning direction.This adjustment changes the speed of the polygon motor and adjusts the image magnification.

Note

• There are the following two methods to adjust the magnification of the printer in sub-scanning direction.

(1)FD-Mag. Adjustment (Printer Adjustment)

Perform this adjustment when the magnification in sub-scanning direction has changed because of the worn

registration roller or paper shrinkage by heat.

(2)Belt Line Speed Adj. (Printer Adjustment)

Perform this adjustment under the conditions not mentioned above.

• Magnification adjustment on back side in sub-scanning direction is not reflected to the image in default. WHEN

ADJUSTING the magnification on back side, enter "User Setting - Common Setting" and turn the "Side 2 Lens

Adjustment mode" [On]. However, since the polygon motor speed is switched for back side, the print speed is

reduced up to 3/4.

A. Procedure



3. "Printer Adjustment Menu screen"Press [03 FD-Mag. Adjustment].

4. "FD-Mag. Adjustment screen"Select the item you want to adjust, and press [COPY].This adjustment can be performed for both sides at a time (all trays) or for back side (each tray).

5. "Copy screen"Select A3 or 11 X 17 paper and press Start key to output the test pattern (No. 16).

6. Check the magnification in sub-scanning direction.Standard value: 0.5% or less (when in life-size)205.7 ± 1 mm or less


8. "FD-Mag. Adjustment screen"Setting range • Printer FD-Mag. (both sides at a time): -100 (shorter) to +100 (longer)

• Other than the above: -80 (shorter) to +20 (longer)1 step = 0.01%

9. Enter a value through the numeric buttons and press [<<SET].


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5501 9.3.4 CD-Mag. Adjustment (Printer Adjustment)

Adjust the magnification in main scanning direction.This adjustment changes the magnification in image processing prior to the laser exposure.

A. Procedure



3. "Printer Adjustment Menu screen"Press [04 CD-Mag. Adjustment].

4. "CD-Mag. Adjustment screen"Select the item you want to adjust, and press [COPY].This adjustment can be performed for both sides at a time (all trays) or for back side (each tray).


6. Check the magnification in main scanning direction.Standard value: ± 0.5% or less (when in life-size)190 ± 1 mm or less


8. "FD-Mag. Adjustment screen"Setting range: -100 (shorter) to +100 (longer) 1 step = 0.01%

9. Enter a value through the numeric buttons and press [<<SET].


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9.3.5 Lead Edge Erase Adjustmet (Printer Adjustment)

Adjust the image erasure amount of the leading edge.

Note

• This adjustment is for C6501/C5501 (copier version) but not for C6501P/C65hc (printer version).

A. Procedure



3. "Printer Adjustment Menu screen"Press [05 LeadEdge Erase Asjustment].

4. "Lead Edge Erase Adjustment screen"Press [COPY].

5. "Copy screen"Set the test chart to the original glass, choose a paper A3 or 11x17, and press Start key.

6. Check the leading edge erasure amount.Standard value a: 4 mm or less


8. "Lead Edge Erase Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -20 (narrower) to +40 (wider) 1 step = 0.1 mm


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5501 9.3.6 Registration Loop Adj. (Printer Adjustment)

Adjust the paper loop amount in the registration roller section to remove paper skew and wrinkle, or paper jam-ming in the registration section.

A. Procedure



3. "Printer Adjustment Menu screen" Press [06 Registration Loop Adj.].

4. "Registration Loop Adjustment screen"Press [ ] or [ ] to select the item you want to adjust, and press [COPY].This adjustment can be performed for feed tray (trays, ADU), paper size (large, small, 150 mm or less ofwidth), and paper type (plain paper, thick paper).

Note





6. If the problem is not solved, press [SERVICE].

7. "Registration Loop Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -99 (smaller) to +99 (larger) 1 step = 0.1 mm


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9.3.7 Pre-registration Adj. (Printer Adjustment)

Adjust the paper loop amount in the pre-registration roller section to remove paper skew and wrinkle, or paperjamming in the pre-registration section.

A. Procedure



3. "Printer Adjustment Menu screen"Press [07 Pre-registration Adj.].

4. "Pre-registration Adjustment screen"Press [ ] or [ ] to select the item you want to adjust, and press [COPY].This adjustment can be performed for feed tray (trays, ADU) and paper size (large, small).

Note




6. If the problem is not solved, press [SERVICE].

7. "Pre-registration Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -99 (smaller) to +99 (larger) 1 step = 0.1 mm


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5501 9.3.8 Belt Line Speed Adj. (Printer Adjustment)

Adjust the magnification in sub-scanning direction.This adjustment charges line speed of the transfer belt.

Note

• There are the following two methods to adjust the magnification of the printer in sub-scanning

direction.

(1) FD-Mag. Adjustment (Printer Adjustment)

Perform this adjustment when the magnification in sub-scanning direction has changed because

of the worn registration roller or paper shrinkage by heat.

(2) Belt Line Speed Adjustment (Printer Adjustment)

Perform this adjustment under the conditions not mentioned above.

A. Procedure



3. "Printer Adjustment Menu screen"Press [08 Belt Line Speed Adj.].

4. "Belt Line Speed Adjustment screen"Press [COPY].


6. Check the magnification in sub-scanning direction.Standard value: ± 0.5% or less (when in life-size)205.7 ± 1 mm or less


8. "Belt Line Speed Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -100 (shorter) to +100 (longer) 1 step = 0.01%

Note

• Setting range is available from -100 to +100, but the optimum value is from -5 to -35. An error

code may occur by entering the value that is not within the optimum value.


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9.3.9 Writing Init. Pos. Memory (Printer Adjustment)

Perform this adjustment after replacing the write unit.

A. Procedure

9.3.10 Color Registration Adj. (Printer Adjustment)

Perform this adjustment when there is a color registration error. Main Scan, Sub Scan, Horizontal (main scanningdirection magnification), and skew of color registration misalignment of Y, M, and C are automatically adjustedrelative to K.

Note

• This adjustment has a large correction area than that of the color registration adjustment in the user

mode. If the malfunction code C-4520 appears, perform this adjustment.

A. Procedure



3. "Printer Adjustment Menu screen"Press [09 Writing Init. Pos. Memory].

4. "Writing Init. Pos. Memory screen"Select the color of the replaced write unit and press [Start].



3. "Printer Adjustment Menu screen"Press [10 Color Registration Adj.].

4. "Color Registration Adjustment screen"Press [Start].

5. The color registration adjustment starts and a message "Completed" is shown in about 2 minutes.If the error message appears, perform an error correction referring to the below.• Error 1: It does not converge within the standard value.

The patch density may be too light. Check around the drum unit and perform the auto gamma0. Then conduct this adjustment again.

• Error 2: The difference of the color registration is too much.Check the installation position of the write unit.

• Error 3: OtherThe other malfunction other than the auto color registration adjustment may occur. Restart themain body in the normal mode to check for malfunction code.

6. "Color Registration Adjustment screen"Misalignment amounts of Y, M, and C of "Main Scan", "Sub Scan", "Horizontal", and "Skew" relative to Kare displayed on the panel. (unit: pixel)

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9.3.11 Color Registration/Manual (Printer Adjustment)

Measure the misalignment amount of Y, M, and C relative to K of "Main Scan", Mag.(ALL) (whole magnification inmain scanning), "Mag.(PART)" (partial magnification in main scanning), "Sub Scan", "Incline" (skew), and "Scan

Bend" (main scanning), and adjust Mag.(PART) manually.

Note


Adjust C6501P/C65hc (printer version) by "Color Registration Adj. (Printer Adjustment)”.

• Be sure the "FD-Mag. Adjustment (Printer Adjustment)" have been adjusted before performing

this adjustment.

(Refer to P.149)

• Be sure the "CD-Mag. Adjustment (Printer Adjustment)" have been adjusted before performing

this adjustment.

(Refer to P.150)

• Complete the "Color Registration Adj. (Printer Adjustment)" have been adjusted before performing

this adjustment.

(Refer to P.155)

A. Procedure



3. "Printer Adjustment Menu screen"Press [11 Color Registration/Manual].

4. "Color Registration Manual Adjustment screen"Press [COPY].

5. "Copy screen"Select A3 or 11 X 17 paper and press Start to outputthe test pattern. Place the outputted test pattern [1]on the original glass securely against the originalpositioning plate /Lt [2] and the original positioningplate /Rr [3], and close the DF or original cover.

Note

• When placing the test pattern onto the original

glass, be sure to take care of the setting direc-

tion (with printing face down) and position.

• Check that the settings for all colors (Y, M, C, K)

in the [Test Pattern Output Mode] is set to 255. If

not, it will cause an error.

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6. Press [SERVICE].Press [Start] to scan the test pattern using the scanner.

7. Shows the misalignment amount of Y, M, and C relative to K of "Main Scan", "Mag.(ALL)" (whole magnifi-cation in main scanning), "Mag.(PART)" (partial magnification in main scanning), Sub Scan, "Incline"(skew), and "Scan Bend" (main scanning) at "Rest" section on the touch panel. (unit: pixel).

8. Make sure that "OK" is displayed for all the items. If the value is out of standard, "NG" and an error codewill appear.If "NG" appears for "Main Scan", "Mag.(ALL)", "Sub Scan", or "Incline", perform the Color registrationadjustment again.

9. If "NG" appears for "Main Scan", "Mag.(ALL)", or"Mag.(PART)", open the toner supply section andloosen 2 screws [1] located beside the developing unitof a color from which an "NG" is displayed, and slidethe adjusting plate [2] up and down to adjust the"Mag.(PART)" (partial magnification in main scanning).Moving the adjusting plate [2] upward increases the"Rest" of the "Mag.(PART)" (positive) and moving theplate downward reduces the "Rest" (negative).

• Adjustment guidelineMove the adjusting plate [2] by referring to the "Rest"of "Mag (PART)" (unit: pixel) displayed at the touchpanel. The scale of the adjusting plate [2] changes the"Rest" approx. 0.5 pixel per notch.

Error code Descriptions Causes

Error 1 Cannot detect the chart pattern Chart misplacement

Error 2 The chart is placed upside down Chart misplacement

Error 3 Cannot detect the chart pattern Different chart is placed

Error 4 Adjustment impossible Software bug

Error 5 Value is out of standard Retry the adjustment

Error 6 Non-volatile data abnormality Check the installation position of the NVRAM board

Error 7 Accessing to unassigned memory Software bug

Error 8 Memory-related abnormality Software bug

Error 9 Program error Software bug

Error 10 Chart is skewed Chart misplacement

Error 11 Image header information read error Software bug

Error 12 Arguments setting error Software bug

Error 13 Measurement error Chart misplacement or chart fail-ure

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9.3.12 Adjustment when replacing multi feed detection board (PF)

Perform this adjustment when replacing the PF multi feed detection board (MFDTB) or the PF drive board(PFDB), as well as when multi feeding is not detected properly for special papers (thin paper, thin coated paper,thick paper, etc.).

Note

• The multi feed detection board/S and /R are adjusted in the manufacturing process as a pair of

upper and lower. Be sure to replace them as a pair.

• Be sure to perform the adjustment under normal room temperature (20 to 30 °C) that is similar

to the real environment where the machine is operated because the temperature sensor output

level varies with its surface temperature. (When you bring in a replacement part from a place

under a different temperature, leave the part and wait for the sensor surface temperature to reach

the room temperature before performing the adjustment.)

A. Procedure

10. Press [Return] to return to [Printer Adjustment Menu] screen.

11. Perform the Color registration adjustment (printer adjustment) with reference to "9.3.10 Color RegistrationAdj. (Printer Adjustment)".

12. Repeat steps 3 to 11 until "OK" is displayed.



3. "Printer Adjustment Menu screen"Press [12 PFU DFeed Detect Adj.].

4. Open the front door [1] of the PF, and open the jam.processing guides PF2 [2] and PF5 [3] in the horizon-tal conveyance section.

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5. Insert a sheet of paper [1] (part No. 65AA-991#, fus-ing adjustment paper, 16 sheets/A3) while turning thenkob PF4 [2], and close the jam processing guidesPF2 [3] and PF5 [4].(When there isn’t paper [1], use 200 to 300 g/m2

paper.)

6. "PFU DFeed Detect Adjustment screen"Press "start"

7. If the multi feed detection adjustment is normally completed, "Completed" is displayed. If abnormally com-pleted, "Error" is displayed. When the error message is is displayed, repeat steps 4 to 6.

Note• When an error occurs, the adjustment data is not written but the data before the adjustment still

remains.

8. Remove the paper inserted in step 5.

9. Turn on the sub power switch and enter the I/O check mode.

10. Enter "18" with the numeric buttons. Confirm that "18-00" is displayed in the message display area.

11. Press Access button.

12. Enter "04" with the numeric buttons. Confirm that "18-04" is displayed in the message display area.

13. Insert a sheet of paper that the customer uses mainly (paper weight: 50 to 300 g/m2) and press Start key. Make sure that "0" is displayed on the panel.

14. Insert one more sheet of paper (total: 2 sheets) that the customer uses mainly.Make sure that "1" is displayed on the panel.

15. Remove the papers and install the removed parts.

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5501 9.3.13 CD Skew Adj. (Printer Adjustment)

Adjust the CY2 lens in the write unit/K and corrects the image distortion of K in main scanning direction.

Note

• Image distortion of K in main scanning direction cannot be corrected by the Color registration

adjustment. (Adjusts YMC only.)

• Image distortion of K in main scanning direction can also be changed by conducting [Chart

Adjustment] of [Both Side Adj.] in the user mode.

A. Procedure



3. "Printer Adjustment Menu screen"Press [13 CD Skew Adj.].

4. "Crosswise Direction Skew Adjustment screen"Press [COPY].


Note

• When the Start key is pressed, CY2 lenses of YMCK are adjusted and the Color registration

adjustment is automatically started. When the adjustment is complete (approx. 2 minutes), test

pattern (No. 16) will be printed.

6. Check the skew in main scanning direction.Standard value: ± 0.3% or less (difference between280mm diagonal lines "a. b" is 0.84 mm or less)

7. If the value is out of spec, press [SERVICE].

8. "Crosswise Direction Skew Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -30 to +30 1 step = 0.01 mm


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9.3.14 Recall Standard Data (Printer Adjustment)

Restore the printer adjustment set values to factory initial data or installation initial data.

Note

• Adjustment data of "Color Registration Adj.", "Color Registration/Manual", "PFU Dfeed detect

Adj.", and "CD Skew Ad." are not restored.

A. Procedure



3. "Printer Adjustment Menu screen"Press [14 Recall Standard Data].

4. "Recall Standard Data screen"Press [Factory Initial Data] or [Installation Initial Data].

Note

• Selecting [Factory Default Data] restores various set values to factory initial data.

• Selecting [Installation Initial Data] restores to the adjustment values stored when I/O check

mode (code "91-00") was conducted.

5. Press [Yes] to restore standard data.Press [No] to cancel the operation.

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9.3.15 Restart Timing Adjustment (Scanner Adjustment)

Adjust the image leading edge timing when scanning in platen mode.This adjustment changes read start timing when scanning original in sub-scanning direction.

Note

• Be sure the "Restart Timing Adjustment (Printer Adjustment)" have been adjusted before perform-

ing this adjustment.

(Refer to P.147)


A. Procedure


2. "Machine Adjustment Menu screen"Press [02 Scanner Adjustment].

3. "Scanner Adjustment Menu screen"Press [01 Restart Timing Adjustment].

4. "Scanner Re-start Timing Adjustment screen"Press [COPY].

5. "Copy screen"Select A3 or 11 x 17 paper. Set the test chart to the original glass and press Start key.

6. Check the leading edge timing.Standard value: 0 ± 1.5mm


8. "Scanner Re-start Timing Adjustment screen"When the value is not within the standard value, press [SERVICE].Setting range: -10 (image faster) to +20 (image slower) 1 step = 0.1 mm


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9.3.16 Centering Adjustment (Scanner Adjustment)

Adjust the image mis-centering of the main scan direction when scanning from the original glass and DF.

Note

• Be sure the "Centering Adjustment (Printer Adjustment)" have been adjusted before performing

this adjustment.

(Refer to P.148)


A. Procedure



3. "Scanner Adjustment Menu screen"Press [02 Centering Adjustment].

4. "Scanner Centering Adjustment screen"Select the item you want to adjust, and press [COPY].

5. "Copy screen"When you select [ADF Centering Adj-Front] or [ADF Centering Adj-Back], set the "Adjustment chart" onthe DF, select A3 or 11 X 17 paper and press Start key. When you select [Orig. Glass Left Image], set the"Test chart" on the original glass, select A3 or 11 X 17 paper and press Start key.

6. Fold the output page in half in main scanning direction, and check the discrepancy from the center line ofthe print.Standard value (platen mode): 0 ± 1.5mm or lessStandard value (DF mode): 0 ± 2.0mm or less


8. "Scanner Centering Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -30 (image in front) to +30 (image in back) 1 step = 0.1 mm


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9.3.17 FD-Mag. Adjustment (Scanner Adjustment)

Adjust the magnification in sub-scanning direction in platen mode and DF mode.This adjustment changes scan speed.

Note

• Be sure the "FD-Mag. Adjustment (Printer Adjustment)" have been adjusted before performing

this adjustment.

(Refer to P.149)


A. Procedure



3. "Scanner Adjustment Menu screen"Press [03 FD-Mag. Adjustment].

4. "Scanner FD-Mag. Adjustment screen"Press [COPY].

5. "Copy screen"Place a test chart on the original glass, select A3 or 11 X 17 paper and press Start key.

6. Check the magnification in sub-scanning direction.Standard value: 0.5% or less (same size)200 ± 1 mm or less


8. "Scanner FD-Mag. Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -40 (shorter) to +40 (longer) 1 step = 0.05%


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9.3.18 Recall Standard Data (Scanner Adjustment)

Restore the scanner adjustment set values to factory initial data or installation initial data.

Note


A. Procedure



3. "Scanner Adjustment Menu screen"Press [04 Recall Standard Data].


Note





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9.3.19 Scanner smooth tone/color (Quality Adjustment)

Conduct the gradation correction of the scanner. When color reproduction is a poor condition, usually conductthe "Auto gamma adjustment" of the "Process Adjustment".

Conduct this adjustment if color reproduction is a poor condition (especially in a high light area) after replacingthe CCD unit, exposure lamp (L1), original glass or each scanner mirror.

Caution:

• Scanner gradation (gamma) has been adjusted for each machine at factory. Please be noted that

the scanner gradation data is overwritten to the average value if the [Adj. data reset] in the "Scan-

ner Smooth Tone/Color Adjustment screen" is pressed.

• Once [Adj. data reset] is pressed, previous data cannot be restored.

Note


A. Procedure

1. After replacing the part(s), set a "Color chart" on the original glass, A3 or 11 X 17 paper and press Startkey.

Note

• Press the hard key on the operation panel, not the soft key on the touch panel.

2. Check if there is no image background or problem in color balance.

3. If there is abnormality, enter Service mode.


5. "Machine Adjustment Menu screen"Press [03 Quality Adjustment].

6. "Quality Adjustment Menu screen"Press [01 Scanner smooth tone/color].

7. "Scanner Smooth Tone/Color Adjustment screen"Press [Adj. data reset].

8. Press the [YES] key to overwrite the scanner gradation data to average value. Press [No] to cancel theoperation.

Caution:

• Scanner gradation (gamma) has been adjusted for each machine at factory. Please be noted

that the scanner gradation data is overwritten to the average value if the [Adj. data reset] in

the "Scanner Smooth Tone/Color Adjustment screen" is pressed.

• Once [Adj. data reset] is pressed, previous data cannot be restored.

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9.3.20 Printer gamma adjustment (Quality Adjustment)

When the color reproduction is in poor condition, conduct this adjustment to correct the gradation.

Note

• Be sure the "Auto gamma adjustment" have been adjusted before performing this adjustment.

(Refer to P.190)

(1) Printer Gamma Offset Adj.

Conduct this adjustment when the color reproduction varies with copy modes to adjust the gradation and thebackground density in a high light area.

Note

• To adjust the printer gamma of C6501/C5501 (copier version), perform the "Printer Gamma Offset

Auto Adj." (Refer to P.169). Only perform this adjustment when you want to make fine adjustments

manually or for C6501P/C65hc (printer version).

a. Procedure



3. "Quality Adjustment Menu screen"Press [02 Printer gamma adjustment].

4. "Printer Gamma Adjustment Menu screen"Press [01 Printer Gamma Offset Adj.].

5. "Printer Gamma Offset Adjustment screen"Press [Next] or [Previous] to select the screen you want to adjust.

Note

• Line1, Line2, Dot1 and Dot2 correspond to the screen names in user mode.

• Contone is a screen used in the character section of Line1, Line2, Dot1, and Dot2.

• ED is a screen used when "Compression" is selected in user mode.

• Contone does not require the adjustment.

6. Press [COPY].

7. Select A4 or 81/2 X 11 paper and press Start key to print a test pattern.

8. Check the printed test pattern.• Make sure that the high light density starting section

of C and K is uniform, and even between the grayreference lines [1].

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5501 9. If they are not even, press [SERVICE].

10. "Printer Gamma Offset Adjustment screen"Press the button of a color (C or K) you want to adjust, enter a value through the numeric button and press[<<SET].Setting range: -128 (lighter) to +127 (darker)


12. Take notice of the gray gradation pattern [1] createdin C, M and Y, make sure that the gray balance at thesquare marks line [2] and [3] is the same.

13. If the gray balance is not the same, press the color (Y or M) you want to adjust, enter a value through thenumeric buttons and press [<<SET].Setting range: -128 (lighter) to +127 (darker)

• How to match the gray balance.Take notice of the gray block [4] made up of 49 patches created in C, M and Y. In the 49 patches, M getsdarker toward right. And Y gets darker downward. C remains unchanged. The patch [5] at the center isthe same color as the gray [2]. The patches [6] positioned at the 4 corners of the patch [5] is the samecolor as the gray [3]. Out of the 49 patches, select a gray of the same gray balance as the gray [6].e.g.) When a patch on the lower right side is more suitable than the patch [5] at the center: Adjust M and

Y in the darker direction.e.g.) When a patch on the upper left side is more suitable than the patch [5] at the center: Adjust M and Y

in the lighter direction.

14. Press [COPY].

15. Select A4 or 81/2 X 11 paper and press Start key to print a test pattern.


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(2) Printer Gamma Offset Auto Adj.

Conduct this adjustment when the color reproduction varies with copy modes to adjust the gradation and thebackground density in a high light area.

Note

• To adjust the printer gamma, perform this adjustment. Perform "Printer Gamma Offset Adj." (Refer

to P.167) when you want make fine adjustments manually.

• This adjustment is for C6501/C5501 but not for C6501P. Adjust C6501P by "Printer Gamma Offset

Adj.".

a. Procedure




4. "Printer Gamma Adjustment Menu screen"Press [02 PrinterGammaOffsetAutoAdj.]

5. "Printer Gamma Offset Automatic Adj. screen"Press [Next] or [Previous] to select the screen you want to adjust.

Note

• The adjustable screens are the same as the ones in Printer Gamma Offset Adjustment.

• The printer gamma offset value of each YMCK displayed are the current values, and they are

linked with the "Printer Gamma Offset Adj." values.

6. Press [Readjust]. To readjust press [Yes], and press [No] to cancel the operation.

Note

• When the gradation in high light area is way off, press [Adj. data reset] and reset the printer

gamma offset value to 0, then press [Readjust].

7. Press [COPY].

8. "Copy" screenSelect the A4 (for metric machine) or 81/2 x 11 (for inch machine) paper and press START key to print a testpattern.

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5501 9. "Printer Gamma Offset Automatic Adj. screen"

Returns to the adjustment screen automatically whentest pattern is printed. Place the outputted test pattern [1] on the originalglass securely against the original positioning plate/Lt[3] and the original positioning plate/Rr [4].

Note

• Set the test pattern so that the green triangular

mark [2] comes to the left side.

(printed side face down)

10. Place 10 sheets of copy paper (white) on top of the test pattern and close the DF or the original cover.

Note

• Be sure to use white copy paper. Otherwise, the printer gamma cannot be corrected properly.

11. Press [Start].

12. The test pattern is scanned and the current YMCK values are updated.

Note

• Since the scanned result at the first scan is not examined, a "Completed" message does not

appear after the first scan.

• The quality judgement is made from the second scan. Make sure to repeat step 8 to 11 until the

"Completed" message appears.

13. "Printer Gamma Offset Automatic Adj. screen"Press [COPY].

14. Perform the steps 8 to 11.

15. Confirm that "Completed" is displayed. If message other than "Completed" is displayed, repeat steps 13to 14.

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(3) Printer gamma sensor adj.

When a poor color reproduction results even after the "Auto gamma adjustment" of the "Process Adjustment",conduct this adjustment to correct gradation.

The printer gamma correction that is performed automatically on regular basis uses PGC sensor to read the pat-tern on the transfer belt and there is a possibility that due to characteristic changes of PGC sensor, correctionmay not be precise. This adjustment uses the scanner to correct the PGC sensor, enabling precise printergamma correction.

Note

• Use plain paper or color copy paper to carry out this adjustment. The color of test pattern

changes according to the colored paper, therefore precise adjustment cannot be gained.

• To reset the data to factory default, press [Adj. data reset]. Press [Yes] to reset the printer gamma

sensor adjustment to the factory default data, and [No] to keep the current data.


a. Procedure




4. "Printer Gamma Adjustment Menu screen"Press [03 Printer gamma sensor adj.].

5. "Printer Gamma Sensor Adjustment screen"Select the screen you want to adjust.

Note

• The adjustable screens are the same as the ones in Printer Gamma Offset Adjustment.

• Whichever screen adjustment is carried out, perform the Contone adjustment together.

6. Press [COPY].

7. Select the A4 (for metric machine) or 81/2 x 11 (for inch machine) paper and press START key to print a testpattern.

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5501 8. "Please load output paper...screen"

Returns to the adjustment screen automatically whentest pattern is printed.Place the outputted test pattern [1] on the originalglass securely against the original positioning plate /Lt [3] and the original positioning plate /Rr [4].

Note

• Set the test pattern so that the green triangular

mark [2] comes to the left side. (printed side

face down)

9. Place 10 sheets of copy paper (white) on top of the test pattern and close the DF or the original cover.

Note

• Be sure to use white copy paper. Otherwise, the printer gamma cannot be corrected properly.

10. Press [Start].

11. If the chart is scanned and it is normal, the gamma sensor adjustment will be carried out, printer gammacorrection is executed and "Completed" message will be displayed.

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12. When an abnormality occurs, an error code is displayed for every cause. Correct the error referring to thefollowing and repeat steps 6 to 11.

Error code Descriptions Causes

Error 1 A crossmark cannot be detected Chart misplacement

Error 2 The chart is placed upside down Chart misplacement

Error 3 Cannot detect the chart pattern Different chart is placed

Error 4 Adjustment impossible Software bug

Error 5 Value is out of standard Retry the adjustment

Error 6 Non-volatile data abnormality Check the installation position of the NVRAM board

Error 7 Accessing to unassigned memory Software bug

Error 8 Memory-related error Software bug

Error 9 Program error Software bug

Error 10 Chart is skewed Chart misplacement

Error 11 Image header information read error Software bug

Error 12 RBG data error Chart is different, or software bug

Error 13 Arguments setting error Software bug

Error 31 Sensor value error Retry the adjustment

Error 51 Regression calculation error Retry the adjustment

Error 52 Sequential number overflow Software bug

Error 53 Regression order error Software bug

Error 54 Select screen information error Software bug

Error 55 Color information error Software bug

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5501 (4) Printer Screen Gradation Adj

Adjust tone jump (in which gradation is not continuous).

Note

• Perform this adjustment after replacing the image processing board (IPB).

a. Procedure




4. "Printer Gamma Adjustment Menu screen"Press [04 Printer Screen Gradation Adj.].

5. "Printer Screen Gradation Adjustment screen"Press [COPY].

6. Select A4 or 81/2 X11 paper and press Start key to print a test pattern.

7. 5 sheets will be printed automatically so check that there are no tone jumps on the test patterns.

8. If tone jump has occurred, press [SERVICE].

9. "Printer Screen Gradation Adjustment screen" Select the color that the tone jump has occurred in.

10. Enter the number subtracted one from the current value and press [<< SET]. Setting range: -3 to +1

11. Repeat steps 5 to 10 until there is no tone jump.

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9.3.21 Sharpness adjustment (Quality Adjustment)

Conduct the sharpness adjustment or, this is carried out when moire reproduced.Perform this adjustment to change the center value of the sharpness adjustment in user mode.

Note

• This adjustment is only effective for images scanned by the scanner.


A. Procedure

9.3.22 Contrast adjustment (Quality Adjustment)

Adjust the contrast. Perform this adjustment to change the center value of the contrast adjustment in user mode.

Note



A. Procedure



3. "Quality Adjustment Menu screen"Press [03 Sharpness adjustment].

4. "Sharpness Adjustment screen"Press [COPY].

5. "Copy screen"Place a "Color chart" on the original glass, select A3 or 11 X 17 paper, and press Start.

6. Press [SERVICE].

7. Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (soft/less moire) to +5 (sharp/more moire)

8. Repeat steps 4 to 7 until the appropriate value can be obtained.



3. "Quality Adjustment Menu screen" Press [04 Contrast adjustment].

4. "Contrast Adjustment screen"Press [COPY].

5. "Copy screen"Place a "Color chart" on the original glass, select A3 or 11 X 17 paper, and press Start.

6. Press [SERVICE].

7. Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (contrast increase) to +5 (contrast decrease)


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9.3.23 Image Distinction Level (Quality Adjustment)

Adjust the threshold value of original image distinction.

Note

• The scanned image is distinguished into text, photo, dot, and colored text areas in image process-

ing, and a screen to be used is determined according to the distinction.

• This adjustment is used to increase the distinction accuracy of the original that the areas are

incorrectly distinguished once.

• To increase the distinction range of photo, perform the adjustment in user mode.



(1) Dot detect adjustment

Adjust the dot distinction threshold value of the original image.

a. Procedure



3. "Quality Adjustment Menu screen"Press [05 Image Distinction Level].

4. "Image Distinction Level Menu screen"Press [01 Dot detect adjustment].

5. "Dot Detect Adjustment screen"Press [COPY].

6. Place an original you want to adjust on the original glass, select A3 or 11 X 17 paper, and press Start key.

7. Dot detect pattern will be printed.By this output pattern, you can find out what this image was distinguished into. Cyan section: Distinguished as dot White section: Distinguished as photo Black section: Distinguished as black text Magenta section: Distinguished as colored text

8. Press [SERVICE].

9. "Dot Detect Adjustment screen"Select the color you wish to adjust, enter a value through the numeric buttons and press [<<SET].Setting range: -5 (dot area decrease) to +5 (dot area increase)


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(2) Color text adjustment

Adjust the color text distinction threshold value of the original image.Perform this adjustment to change the center value of the color text distinction function in user mode.

a. Procedure




4. "Image Distinction Level Menu screen"Press [02 Color text adjustment].

5. "Color Text Adjustment screen"Press [COPY].


7. Color text detect pattern will be printed.By this output pattern, you can find out what this image was distinguished into. Black section: Distinguished as black text Magenta section: Distinguished as colored text

8. Press [SERVICE].

9. "Color Text Adjustment screen" Enter a value through the numeric buttons and press [<<SET]. Setting range: -5 (color text area decrease) to +5 (color text area increase)


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5501 (3) Dot/Text area adjustment

Adjust the dot distinction and text distinction threshold values of the original image.Perform this adjustment to change the center value of the text photo distinction function in user mode.

a. Procedure




4. "Image Distinction Level Menu screen"Press [03 Dot/Text area adjustment].

5. "Dot/Text Area Adjustment screen"Press [COPY].


7. Dot/text detect pattern will be printed.By this output pattern, you can find out what this image was distinguished into. Cyan section: Distinguished as dot White section: Distinguished as photo Black section: Distinguished as black text Magenta section: Distinguished as colored test

8. Press [SERVICE].

9. "Dot/Text Area Adjustment screen" Enter a value through the numeric buttons and press [<<SET]. Setting range: -5 (dot area increase/text area decrease) to +5 (dot area decrease/text area increase)


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9.3.24 ACS adjustment (Quality Adjustment)

Perform this adjustment when ACS (Automatic color selection) function does not work properly.

Note



A. Procedure



3. "Quality Adjustment Menu screen"Press [06 ACS adjustment].

4. "Place original and touch [SCAN] screen"Place an original that the ACS does not work properly on the original glass and press [Scan].

5. Next to the "JUDGE:", the result "COLOR" or "BLACK" will be displayed.

6. Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (black) to +5 (color)


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9.3.25 Density adjustment (Quality Adjustment)

Adjust the AES density, copy density, background density, and B-side (see-through image) density.This adjustment moves in parallel with shade direction without changing the printer gamma curve form and

adjusts the copy density.

Note



(1) AES adjustment

Adjust to change the center value selected in automatic copy density function in user mode.

a. Procedure



3. "Quality Adjustment Menu screen"Press [07 Density adjustment].

4. "Density Adjustment Menu screen" Press [01 AES adjustment].

5. "AES Adj. -Set value then touch [SCAN] screen"Place an original that you want to change the AES density on the original glass and press [Scan].

6. Next to the "RESULT:", the numeric value will be displayed.

7. If the "RESULT" is other than 0, enter a value through the numeric buttons and press [<<SET].(e.g.: If the "RESULT" is 2, input -2).Setting range: -5 to +5

8. Repeat steps 5 to 7 until the "RESULT" becomes 0.

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(2) Copy density adjustment

Adjust the density for copying. Perform this adjustment to change the center value of the "Original Density Shift" in user mode.

a. Procedure




4. "Density Adjustment Menu screen"Press [02 Copy density adjustment].

5. "Copy Density Adjustment screen"Press [ ] or [ ] to select the item you want to adjust.

6. Press [COPY].

7. "Copy screen"Select the mode to adjust, select A3 or 11 X 17 paper, place a "Color chart" on the original glass, andpress Start key.

8. Press [SERVICE].

9. "Copy Density Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (lighter) to 5 +(darker)


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5501 (3) Adjust Background

Adjust the background density (density of highlighted area) for copying. In user mode only a batch adjustment is enabled. Therefore, it is impossible to perform individual adjustment for

original settings or color modes.

a. Procedure




4. "Density Adjustment Menu screen"Press [03 Adjust Background].

5. "Background Adjustment screen"Press [ ] or [ ] to select the item you want to adjust.

6. Press [COPY].

7. "Copy screen"Select the mode to adjust, select A3 or 11 X 17 paper, place a "Test chart" on the original glass, and pressStart key.

8. Press [SERVICE].

9. "Background Adjustment screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (lighter) to 5 +(darker)


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(4) B-side Prevent

Adjust the density of see-through image on back side of paper (density for shadow area) for copying. In user mode only a batch adjustment is enabled. Therefore, it is impossible to perform individual adjustment for

original settings or color modes.

a. Procedure




4. "Density Adjustment Menu screen"Press [04 B-Side Prevent].

5. "B-Side Prevent screen"Press [ ] or [ ] to select the item you want to adjust.

6. Press [COPY].

7. "Copy screen"Select the mode to adjust, select A3 or 11 X 17 paper, place a text chart on the original glass, and pressStart key.

8. Press [SERVICE].

9. "B-Side Prevent screen"Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (lighter) to 0


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9.3.26 Tone adjustment (Quality Adjustment)

Conduct the tone adjustment of red, green or blue.Perform this adjustment to change the center value for the "Hue-Fine Adjustment" in the user mode.

Note



(1) Red

Adjust the density of red.

a. Procedure



3. "Quality Adjustment Menu screen" Press [08 Tone Adjustment].

4. "Tone Adjustment Menu screen"Press [01 Red].

5. "Red screen"Press [COPY].

6. Select A3 or 11 X 17 paper, place a "Color chart" on the original glass, and press Start key.

7. Press [SERVICE].

8. Enter a value through the numeric buttons and press [<<SET].Setting range: -5 (lighter) to 5 +(darker)

9. Repeat steps 5 to 8 until it is appropriate.

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(2) Green

Adjust the density of green.

a. Procedure

(3) Blue

Adjust the density of blue.

a. Procedure




4. "Tone Adjustment Menu screen"Press [02 Green].

5. "Green screen"Press [COPY].


7. Press [SERVICE].






4. "Tone Adjustment Menu screen"Press [03 Blue].

5. "Blue screen"Press [COPY].


7. Press [SERVICE].



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5501 9.3.27 Recall standard data (Quality Adjustment)

Restore the quality adjustment set values to factory initial data or installation initial data.

Note

• Adjustment data of "Scanner smooth tone/color" is not restored.

A. Procedure



3. "Quality Adjustment Menu screen"Press [09 Recall standard data].


Note





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9.3.28 Non-Image Area Erase Check

When installing the copier or moving its installation location, check to see if the "Non-Image Area Erase" of theapplication function works satisfactorily. This also automatically adjusts sensitivity to correctly detect the non-

image area.

Preparation • Open the DF or the original cover fully. • Do not put anything on the original glass. • Clean the original glass.

A. Procedure


2. "Machine Adjustment Menu screen"Press [04 Non-Image Area Erase Check].

3. "Non-Image Area Erase check screen"Press [Start].

4. Check that the message below is displayed.

NORMAL adjustment selected.

The machine is set to appropriate parameters for Non-image Area Erase.

If any other message appears, refer to "B. Error message and Handling", and perform the Non-IimageArea Erase Check again.

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5501 B. Error message and Handling

If an error is detected in the Non-Image Area Erase Check, error message as the following is displayed.

(1) Error message -1

Adjust for Moderate Brightness.

The Non-image area erase function may not operate correctly with dark (density) originals.

Handling 1When the "Non-image area erase" function is not used very frequently, or when copy originals that have a darkbackground are not copied very frequently in non-image area erase, the copier can be used in the current instal-lation location. However, when copy originals that have a dark background are frequently copied, install thecopier in a location where less external light gets in (darker) than the present location, and check the non-imagearea erase check mode again.

(2) Error message -2

Adjust for Extreme Brightness.

In many case, the non-image area erase function will not operate correctly.

Handling 2When the"Non-image area erase" function is not used very frequently, the copier can be used in the currentinstallation location. However, if the "Non-image area erase" function is frequently used, install the copier in alocation where less external light gets in (darker) than the present location, and check the non-image area erasecheck mode again. At this time, when there is a bright light source such as a fluorescent light installed directlyabove the copier, reconsider the installation location, or take some measures to shield the light source andcheck the mode again.

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9.4 Process Adjustment

9.4.1 1st transfer manual adj. (High Voltage Adjustment)

Do not conduct this adjustment in the field.

9.4.2 2nd transfer manual adj. (High Voltage Adjustment)


9.4.3 HV adj. (separation AC) (High Voltage Adjustment)

Must not be used during maintenance/repair.

9.4.4 HV adj. (sepration DC) (High Voltage Adjustment)


9.4.5 Pre-transfer Guide HV check (High Voltage Adjustment)

Do not use this adjustment in the field.

9.4.6 Blade setting mode (Drum Peculiarity Adj.)

Perform this adjustment when changing the belt cleaning blade or the transfer belt. In this mode, toner is appliedonto the transfer belt then cleaned with the belt cleaning blade. This prevents the damages of the transfer beltand the belt cleaning blade.

A. Procedure

1. "Service Mode Menu screen"Press [02 Process Adjustment].

2. "Process Adjustment Menu screen"Press [02 Drum Peculiarity Adj.].

3. "Drum Peculiarity Adjustment Menu screen"Press [01 Blade setting mode].

4. "Blade Setting Mode screen"Press [Start]. This process completes in about 15 seconds and complete message is shown on thescreen.

Konica Minolta C6500 Machine Adjustments

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Transcript of Konica Minolta C6500 Machine Adjustments