pro8432wt troubleshooting

Pro8432WT Troubleshooting Ver.7.3

June 14th, 2017

Oki Data Corporation

Contents

■ Paper handling

1. Turned up at the top of media

2. Exit jam

3. Induce exit jam

4. Multi feed

5. Hopping jam

6. Skew

7. Curl

8. Irregular stack

■ PQ

9. High resistance media : Circular faded mark

10. PQ issue due to adhesion of coating

10-1. Some specific coated media : faded print

10-2. Horizontal streaks of EP drum cycle

10-3. Vertical White Line

11. EP Drum unit : horizontal streak

12. Uneven density around the top of media

13. Uneven pattern printout

14. Pickup-roller mark

15. Clack

16. Wrinkle

17. Vertical Line caused by storage under high temperature

environment

18. Faded print

19. Dirty side edge

Symptom 1 - Turned up at the top of media

(Two sheet type media) Transfer layer of two sheets type media turns up at the top of media.

Since this media is two sheets type, the issue does not affect a printed result after transfer to textiles.

Turned up at the top of media

Occurrence

Conditions

All environments.

It occurs rarely in low temperature and low humidity environment.

Causes This phenomenon occurs when the media after fusing rubs against the

conveying rib of the paper guide.

Solution Stock the media in the environment of low temperature and low humidity.

Possible Side

Effect

Nothing.

Symptom 2 - Exit JAM

If you print curled media, it occurs turned up at the top of media, and it causes exit JAM.

Exit JAM

Occurrence

Conditions

Using of transfer media left in high humidity

Causes Transfer media has been waved or curled before printing. And curled media

after fusing rubs against the conveying rib of the paper guide. As a result,

the load of feeding increases and JAM occurs.


Possible Side

Effect

Nothing.

Jamming paper

Curled paper before print

Symptom 3 - Induce exit JAM

Jam occurs when the bottom edge of the paper sticks to separation blade of fuser unit.

Induce exit JAM

Occurrence

Conditions

Not specified.

The amount of deposition of glue of transfer media or toner will be

increased each time printing with the media.

Causes Adhere glue of transfer media or toner to separation blade of fuser unit.

Herewith, when any media has been exited, the media tends to stick to the

separation blade.

Solution Clean separation blade using cotton soaked with alcohol.

Also, make a margin of 15mm from the bottom end of the page when create

and print design.

Possible Side

Effect

Nothing.

Glue or tonner adhered to separation blade

Glue or tonner adhered to jam paper

Clean tip of the separation blade using cotton soaked with alcohol.

Open the guide of fuser unit after fuser unit has been cooled down enough.

How to clean the separation blade

Symptom 4 - Multi feed

Multi feed

Occurrence

Conditions

High temperature and low humidity environment.

All environment may occur.

Causes Static Electricity.

Surface condition of the media.

Solution Set media to a tray one by one.

Possible Side

Effect

Nothing.

Symptom 5 - Hopping JAM

When one sheet of media has been set on a tray, the sheet can't be fed.

Hopping JAM

Occurrence

Conditions

Characteristic of media.

NN/HH/LL

Causes The frictional force between the cork part of Hopper assembly and media is

large.

Solution Hide the cork part of Hopper assembly by piece of paper.

Possible Side

Effect

If hide the cork part, multi feed may occur when set multiple sheet.

Hide the cork by a piece of paper.

Cork

Piece of paper (Taped)

(Size : 30x90mm)

Tape

Fit the back side to the chamfering line.

(See below figure)

Roller

Cork

Piece of paper Tape

Align to the Chamfering line

Symptom 6 - Skew

Skew

Occurrence

Conditions

High temperature and high humidity environment.

Causes The rigidity of the media is weakened by absorbing moisture and the guide

effect of the paper guide is reduced.


Possible Side

Effect

Nothing

Symptom 7 - Curl

The media after printing is curled.

Curl

Occurrence

Conditions

All environments.

Causes Characteristic of media, the material between front and back side will be

different.

Solution Even if printing is curled, there are no issue with the printing quality. Please

open and use.

Same level as Pro9420WT(C9WT)

Possible Side

Effect

Nothing

Symptom 8 - Irregular stack

Irregular stack

Occurrence

Conditions

1. The media of film material.

2. Moisture absorbed media.

Causes 1. The sheets adhere by static electricity each other.

2. Curling occurred and push out the stacked medium.

Solution Take out media one by one from stacker.

Possible Side

Effect

Nothing

Symptom 9 - High resistance media : Circular faded mark

Circular faded marks could appear on toner image when high resistance media is used. This problem occurs during toner transfer.

Circular faded mark

Occurrence

Conditions

High resistance media

Normal to low humidity environment (NN/NL/LL)

Causes Discharge at the toner transfer process to medium

Solution In case of two-sheet-type transfer medium whose adhesion layer is white

and prepared as separated sheet, circular faded mark is hardly visible on

garment thanks to the white adhesion layer that masks circular faded mark.

In case of one-sheet-type transfer medium whose adhesion layer is usually

transparent, circular faded mark is sometimes visible on garment.

If circular faded mark is still visible on garment, try followings

1. Press scroll button ▲ or ▼ to display “Functions.”

2. Select [Menus] and press [Enter].

3. Select [Print Adjust] and press [Enter].

4. Select [Paper Color Setting] and press [Enter].

5. Adjust level +1 using scroll button ▲.

6. Press [Enter] to select the level. Check mark appears next to the level

and change is now applied.

7. Check print result. Repeat procedure above until you get desirable

result.

Possible Side

Effect

Dirty side edge could appear. If circular faded mark and dirty side edge occur

at the same time, improve circular faded mark by “Paper Color setting” as +1

or +2 and cut the paper side edge to remove the dirty side edge.

Symptom 10-1 - Some specific coated media : Faded print

The print will appear faded on the page when printing low coverage contents.

Faded print

Occurrence

Conditions

This could occur under high humidity environment.

Causes Adhesion of coating material on some specific coated media surface to EP

Drum surface

Solution To avoid this symptom, open media package just before use and use this

kind of media under low humidity environment only.

If this symptom happens, clean surface of EP drum using cotton soaked with

alcohol.

In order to clean all of surface of the EP drum, the appeared surface position

of the EP drum has to be changed. To make it realized, repeat the below

processes five times.

- Open top cover.

- Detach the EP unit.

- Clean the appeared surface of the EP drum.

- After the alcohol dries, return the EP unit and close the top cover.

Possible Side

Effect

When you clean the EP drum surface, take care followings.

Light exposure.

※When the EP drum is exposed to light for a long time, Horizontal band

may appear.

Uneven cleaning.

※If some area of EP drum surface is not cleaned enough, horizontal band

may appear.

Symptom 10-2 - Horizontal streaks of EP drum cycle

White or black horizontal streaks could appear on printing area. When these appear in the cycle of the EP drum, the glue or coating of the transfer media adhered to the EP drum.

94mm

enlarged photo

Name Horizontal streaks of EP drum cycle

Occurrence

Conditions

・After printing transfer media covered with glue or coating.

・Printing low coverage contents on transfer media.

・Using of transfer media left in high humidity.

Causes This phenomenon occurs when the glue or coating of the transfer media

adhere to the EP drum.

Solution Clean surface of EP drum using cotton soaked with alcohol.

In order to clean all of surface of the EP drum, the appeared surface position

of the EP drum has to be changed. To make it realized, repeat the below

processes five times.

- Open top cover.

- Detach the EP unit.

- Clean the appeared surface of the EP drum.

- After the alcohol dries, return the EP unit and close the top cover.

Possible Side

Effect

Attention to light exposure.

※When exposed to light for a long time, Horizontal band may appear.

Attention to uneven cleaning.

※Horizontal band may appear.

Symptom 10-3 - Vertical White Line

Vertical white line could appear on printing area

enlarged photo

Name Vertical White Line

Occurrence

Conditions

・After printing transfer media covered with glue or coating.

・Printing low coverage contents on transfer media.

・Using of transfer media left in high humidity.

Causes This phenomenon occurs when the glue or coating of the transfer media

entered the EP unit.

Solution Execute “VL Cleaning” from operation panel.




4. Select [VL Cleaning] and press [Enter].

5. Confirm [Execute] has been selected, and press [Enter].

Possible Side

Effect

EP unit life will be shortened by 2 page count at one time.

Symptom 11 - Horizontal White Lines

There is a possibility that streaks with a EP drum cycle appear in a halftone area of white toner.

SampleA ( Less than 120 prints per day )

Print pattern Garment after transfer

SampleB ( More than 120 prints per day )

Print pattern Garment after transfer

Name Horizontal White Lines

Occurrence

Conditions

・All environments.

・Halftone area of white toner.

・It is usually “SampleA” or better.

If you print more than 120 sheets per day, you may get worse up to

“SampleB”.

Causes This phenomenon occurs due to the material characteristics of the EP unit.

Solution If lines have appeared, please enable “Drum Cleaning” mode which can be

set from operation panel.




4. Select [Drum Cleaning] and press [Enter].

5. Select [On] and press [Enter].

Please disable “Drum Cleaning” mode next morning.

Possible Side

Effect

EP unit life will be shorten when “Drum Cleaning” mode has been enabled.

Symptom 12 - Uneven density around the top of media

Uneven density and Ghost around the top of media by element parts in the EP unit.

Pro8432WT(C8WT) Pro9420WT(C9WT)

【Reference】

38mm 50mm

Cyan 100%

Name Uneven density around the top of media

Occurrence

Conditions

・All environment

・Printing high coverage contents

Causes This phenomenon occurs when there is a difference in the charging of toner

in the element part cycle.

Solution Same level as Pro9420WT(C9WT).

Possible Side

Effect

Nothing

Pro8432WT(C8WT) Pro9420WT(C9WT)

【Reference】

38mm 50mm

Ghost pattern

Symptom 13 - Uneven pattern printout

After print on this media, uneven pattern printout appears.

Uneven pattern

printout

Uneven pattern printout

Occurrence

Conditions

NN/HH

Causes Ingress of moisture from high humidity environment to media

.

Solution Stock the media at a place of low humidity.

The issue does not affect a printed result after transfer to textiles.

Possible Side

Effect

Nothing

Magenta+White 100% Magenta 100%

After transfer to textile

Symptom 14 - Pickup-Roller mark

In the top of the page, Pickup-Roller mark could appear.

Pickup-Roller mark

Occurrence

Conditions

Set multiple sheets on the MPT, it could occur on the second and

subsequent sheet.

Causes Feeding from the MPT, the back side of the first sheet rubs against the

surface of the second sheet.

Solution Set the media on a tray one by one.

Or

Set the media on Tray1.

Possible Side

Effect

Nothing

Symptom 15 - Clack

After print on this media, some clacks appear on the media.

Clack

Clack

Occurrence

Conditions

All Conditions

Print Duty 200% or more

Causes Characteristic of media

Solution A crack occurs to a layer of an upper toner

C7WT or C9WT also have the issue, but the issue has not been pointed out

from customers so far.

In addition, since the issue does not affect a printed result after transfer to

textiles.

Possible Side

Effect

Nothing

Not visible after transfer to textile

Paper

Clack

Textile

Clack

White Magenta

Symptom 16 - Wrinkle

After print on this media, some wrinkles appear on the media.

Wrinkle

Wrinkle

Occurrence

Conditions

HH/NN

Causes Ingress of moisture from high humidity environment to media

Solution Stock the media at a place of low temperature and low humidity.

Possible Side

Effect

Nothing

Symptom 17 - Vertical Line caused by storage under high

temperature environment.

Vertical line could appear on printing area

enlarged photo

Name Vertical Line caused by storage under high temperature environment.

Occurrence

Conditions

After EP durm is stored for 2 weeks or more under the environment that

max temperature in a day reaches about 60℃.

※Only white toner.

Causes Toner is cohered by high temperature.

Solution Execute “VL Cleaning” from operation panel.




4. Select [VL Cleaning] and press [Enter].

5. Confirm [Execute] has been selected, and press [Enter].

6. Print.

Repeat the process ”1～6” about 5 times.

Possible Side

Effect

EP drum life will be shortened by 3 pages at the process ”1～6”

Symptom 18 - Faded print

Faded print could appear on toner image when high resistance medium is used. This problem occurs during toner transfer.

Faded print

Occurrence

Conditions


All environment

Causes Toner transfer problem from EP drum to medium.

Solution You can manually adjust using printer control panel.





5. Adjust level +1 using scroll button ▲.




result

Possible Side

Effect

Dirty side edge could appear. If faded print and dirty side edge occur at the

same time, improve faded print by increasing “Paper Color setting” and cut

the paper side edge to remove the dirty side edge.

Symptom 19 - Dirty side edge

Dirty side edge could appear when high resistance medium is used. This problem occurs during toner transfer.

Dirty side edge

Occurrence

Conditions


All environment

Causes Discharge at the side edge of medium during toner transfer process

Solution You can manually adjust using printer control panel.





5. Adjust level -1 using scroll button ▼.




result

Medium’s edge

Possible Side

Effect

Faded print could appear. If faded print and dirty side edge occur at the

same time, improve faded print by increasing “Paper Color setting” and cut

the paper side edge to remove the dirty side edge.

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