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I JUST CHANGED THE LASER(PRINTHEAD) ON A T612 AND NOW HAVE A 78.94 ERROR CODE. IT ALSO CONTINUOUSLY PRINTS OUT PAGES WITH HORIZONTAL TEST STRIPES

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Upon investigation from my friends there saying and I agree with them that this is a control board issue, its like $200 bucks for the part. I do not know if you had plans but I do not want to ruin them with my information.

Your best bet here is the following:


Try to puchase the part secound hand and put it in yourself, OR recycle the printer for a newer model. I hate to bring people bad news I am only calling out what was confirmed by them.

Your choices are the above, Thanks for your question and please do click the accept button for my effort.

Posted on Aug 05, 2010

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Error sc 329


This is for a Ricoh copier. You did not indicate machine.

SC 329: Laser Beam Pitch Adjustment Error
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The LD unit home position sensor does not detect an on condition while changing the LD unit position for correcting the LD position or changing the DPI.


Instructions from the Service Manual below...

.

5.4.3 LASER BEAM PITCH ADJUSTMENT
There are two laser beam pitch adjustment procedures: one for 400 dpi, and one
for 600 dpi. These adjustments use the following SP modes.
· SP2-109-1: Laser Beam Pitch Adjustment - 400 dpi
· SP2-109-2: Laser Beam Pitch Adjustment - 600 dpi
· SP2-109-3: Laser Beam Pitch Initial Setting - 400 dpi
· SP2-109-4: Laser Beam Pitch Initial Setting - 600 dpi
· SP2-902-2, no.12: IPU Test Pattern - Cross Stitch - 400 dpi
· SP2-902-2, no.13: IPU Test Pattern - Cross Stitch - 600 dpi

1. Perform SP2-109-8 (Beam Pitch Data Reset).

2. Input the value for 400 dpi that is printed on the LD unit into SP2-109-1.
Use the value printed after "P" on the new LD unit as shown below.
NOTE: Do not use values printed after a "V".

(These value numbers are on a sticker inside the machine with a UPC code on it. The numbers are just under the UPC barcode. And example number looks like this: "15980300151P: 120, 172", so the example 400 dpi value here is "120".)

3. Press the "Enter" key.

4. Perform SP2-109-3.

5. Print the 400-dpi test pattern onto A3 (11"x17") paper using SP2-902-2 no.12
(cross stitch). (See Service Tables - Test Pattern Printing - Section 4.2.3, pasted below.)

6. Write the value of SP2-109-1 on the test pattern which was input at step 2.

7. Change the value of SP2-109-1 and print another test pattern, repeating steps
2 to 5. Print about 5 patterns with different values for SP2-109-1 (e.g. "48", "96",
"192", "240").

8. Check this test pattern. If the laser beam pitch is not correct, the image looks
like a black vertical stripe pattern.
NOTE: If the laser beam pitch is correct, the vertical stripe is not so noticeable.
If the value is not correct, the vertical stripe pattern is darker.

9. Adjust the laser beam pitch position until the thin lines are of uniform thickness
(no striping effect should appear on the printout), doing steps 2, 3, and 4. (In
step 2, input a value which is estimated to be correct, then do steps 3 and 4,
then if necessary go back to step 2 and try another value.)

10. After adjusting the laser beam pitch for 400 dpi, adjust the laser beam pitch for
600 dpi, using the same procedure as for 400 dpi (use the SP modes for 600
dpi).

.

4.2.3 TEST PATTERN PRINTING (SP2-902)
NOTE: Do not operate the machine until the test pattern is printed out completely.
Otherwise, an SC may occur.

1. Access the SP mode which contains the test pattern you need.

2. Press exit, then touch the "Copy Mode" key on the operation panel to access
the copy mode display.

3. Select the paper size.

4. Press the "Start" key to print the test pattern.

5. After checking the test pattern, exit copy mode by touching the "SP Mode" key.
Reset the test pattern to 0.

6. Exit the SP mode.

.
Test Pattern Table (SP2-902-2: Test Pattern Printing - IPU)
No. Test Pattern
-
0 None
1 Grayscale 1
2 Grayscale 2
3 Grayscale 3
4 Grayscale 4
5 Grayscale 5
6 Vertical Lines (256-greyscale) 13 Cross Stitch (600 dpi)
7 Vertical Lines (1-dot)
8 Vertical Lines (2-dot)
9 Hatch Pattern
10 Cross Pattern
11 Slant Pattern
12 Cross Stitch (400 dpi)
.

Test Pattern Table (SP2-902-3: Test Pattern Printing - Printing)
No. Test Pattern
-
0 None
1 Vertical Line (1-dot)
2 Horizontal Line (1-dot)
3 Vertical Line (2 dot)
4 Horizontal Line (2-dot)
5 Grid Pattern (Single-dot)
6 Grid Pattern (Double-dot)
7 Alternating Dot Pattern
8 Full Dot Pattern
9 Black Band
10 Trimming Area
11 Argyle Pattern
12 16 Grayscales (Horizontal)
13 16 Grayscales (Vertical)
14 16 Grayscales (Vert./Hor.)
15 16 Grayscales (Vert./Hor Overlay)
16 Not used
17 Horizontal Line (1-dot)
18 Grid Pattern (Single-dot)
19 Grid Pattern (Double-dot)
20 Alternating Dot Pattern
21 Blank Page

.

These adjusments listed in the manual require removal of a service panel and mechanical adjustment of the laser mounts, so it should be done by a qualified technician.

However, these test procedures can indicate whether or not this is the problem with your printer.

Sep 05, 2012 | Office Equipment & Supplies

1 Answer

HORIZONTAL LINES ACROSS T644 PRINTER AND 930.00 ERROR CODE


Hello,

The error code 930.00 indicates a problem in the laser print head section of the printer. This will cause error in the printouts like you are having. This type of problem is not user serviceable and will require an authorized service dealer to obtain and install the printhead assembly. This is directly from page 2-24 of the service manual.

Jul 24, 2012 | Lexmark T644 Laser Printer

1 Answer

Lexmark x544 108.02 printhead error


1. Power off the printer/MFP, wait 30 seconds, and then power it on again. Did the error message return?
Yes: Continue to Step 2.No: Print a test page. If the page prints, the printer is working correctly.
If possible, connect the printer/MFP's power cord directly into a grounded wall outlet. In rare instances, a surge protector or uninterruptible power supply (UPS) can generate false error messages.Did the error message return?
Yes: Contact Lexmark @ 1-800-(539-6275) No: Print a test page. If the page prints, the printer is functioning correctly.

Aug 16, 2011 | Lexmark X544n All-In-One Laser Printer

1 Answer

Lines on print. There's are three lines on picture print only. Can't see the line on document. It's about 1/4 inch wide and going throught top to bottom.


Have ou gone into your menus. Into troubleshooting, then image quality.
You will want to run both the eliminate light stripes and eliminate smears procedures. that will purge the print head, blow air through the jets and hopefully resolve the problem. I do believe the 8550 has a Jet Substitutin procedure where you can do a workaround and make other jets make up for the light areas.
here are some directions, Will forward more

  1. Press the [Up] or [Down] arrow button on the Control Panel to select [Troubleshooting] on the Display Screen, and then press the [OK] button.
  2. Press the [Up] or [Down] arrow button to select [Print Quality Problems], and then press the [OK] button.
  3. Press the [Up] or [Down] arrow button to select [Troubleshooting Print Quality Page], and then press the [OK] button.
  4. Evaluate the 'Light Stripes Test' page for missing printhead jets, such as missing Cyan, Magenta, Yellow or Black color bars. The 'Light Stripes Test' page is the last page of the Troubleshooting Print Quality Page that printed.

    WARNING: To avoid injury, do not touch the sharp metal strip attached to the clear rubber wiper blade in the Maintenance Kit.

  5. Use a clean lint-free cloth or a new paper coffee filter to gently clean the maintenance unit's clear rubber wiper blade, use only a wiping motion across the entire length of the wiper blade, and then empty the waste tray. A dirty maintenance kit wiper blade can cause white lines and weak or missing printhead jets.


  6. 8500-wiper-blade-clean.jpg

  7. Repeat step 3 to reprint the Troubleshooting Print Quality Pages. If there are no missing or partially missing color bars then the print quality problem has been resolved. If there are missing or partially missing color bars then the printhead cleaning procedure will need to be performed. Continue with the next section.
To clean the printhead using the basic eliminate light stripes procedure:
  1. Press the [Up] or [Down] arrow button on the Control Panel to select [Troubleshooting] on the Display Screen, and then press the [OK] button.
  2. Press the [Up] or [Down] arrow button to select [Print Quality Problems], and then press the [OK] button.
  3. Press the [Up] or [Down] arrow button to select [Eliminate Light Stripes], and then press the [OK] button.
  4. Press the [Up] or [Down] arrow button to select [Basic], and then press the [OK] button. The printer will perform a head cleaning, which will take about five minutes. The printer will then print a cleaning page and a light stripes test page.
  5. Repeat steps 1 - 4 one more time. If there are no weak or missing jets then the print quality problem has been resolved. If there are still weak or missing jets after two basic light stripe cleanings, continue with step 6.

    NOTE: Do not try the Advanced Eliminate Light Stripes Cleaning mode without performing two basic cleanings first.

    To clean the printhead using the advanced eliminate light stripes procedure:

  6. Press the [Up] or [Down] arrow button to select [Advanced], and then press the [OK] button.
  7. Select the missing jet color and number. If necessary, check the light stripes test page to determine the color and jet number of the missing jet.

    NOTE: Only perform the advanced light stripe cleaning once. If weak or missing jets still persist, continue with step 8.


  8. Print the Troubleshooting Print Quality Page. Evaluate the Light Stripes Test page for missing printhead jets, such as missing Cyan, Magenta, Yellow or Black color bars. If necessary, perform the basic eliminate light stripes procedure one more time. If the Advanced Eliminate Light Stripes procedure does not resolve the weak or missing jets, perform the Enable Jet Substitution Mode. See the Related Items below.

Feb 05, 2010 | Xerox Phaser 8550DP Printer

3 Answers

I have a Lexmark E450dn displaying a "935.15 Service Printhead" error message and will not print. Seeing as Laser Printers do not have printheads, instead they have Scanners and Fusers, which should I be...


a 935 printhead error is a fatal error which means the scanner motor has failed to initialize. the term printhead is short for printhead scanner. this error can be caused by either the engine board or the scanner % wise 40%engine board 60% scanner ive done 120 repairs on lexmark laser for the last 7 years trust me one of these is the problem

Jun 16, 2009 | Lexmark E450dn Laser Printer

1 Answer

Pages printing blank


Resolving white, light lines or streaks (eliminate light stripes)

From the printer, print the Troubleshooting Print Quality Pages.
With Troubleshooting highlighted, press the OK button.
Scroll to Print Quality Problems by pressing the Up or Down Arrow button. Press OK.

Scroll to Troubleshooting Print Quality Page. Press OK.
Evaluate the Light Stripes Test page for missing printhead jets (missing cyan, magenta, yellow or black color bars).

Clean the maintenance unit's wiper blade and empty the waste tray. A dirty maintenance drawer wiper blade can cause white lines and weak or missing printhead jets. Using a clean lint-free cloth or a paper coffee filter, gently clean the blade with a wiping motion across the entire length of the wiper blade.

Dec 20, 2008 | Xerox Phaser 8400 Laser Printer

2 Answers

SC 329 code Aficio 550


SC 329: Laser Beam Pitch Adjustment Error
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The LD unit home position sensor does not detect an on condition while changing the LD unit position for correcting the LD position or changing the DPI.


Instructions from the Service Manual below...

.

5.4.3 LASER BEAM PITCH ADJUSTMENT
There are two laser beam pitch adjustment procedures: one for 400 dpi, and one
for 600 dpi. These adjustments use the following SP modes.
· SP2-109-1: Laser Beam Pitch Adjustment – 400 dpi
· SP2-109-2: Laser Beam Pitch Adjustment – 600 dpi
· SP2-109-3: Laser Beam Pitch Initial Setting – 400 dpi
· SP2-109-4: Laser Beam Pitch Initial Setting – 600 dpi
· SP2-902-2, no.12: IPU Test Pattern – Cross Stitch – 400 dpi
· SP2-902-2, no.13: IPU Test Pattern – Cross Stitch – 600 dpi

1. Perform SP2-109-8 (Beam Pitch Data Reset).

2. Input the value for 400 dpi that is printed on the LD unit into SP2-109-1.
Use the value printed after “P” on the new LD unit as shown below.
NOTE: Do not use values printed after a “V”.

(These value numbers are on a sticker inside the machine with a UPC code on it. The numbers are just under the UPC barcode. And example number looks like this: "15980300151P: 120, 172", so the example 400 dpi value here is "120".)

3. Press the “Enter” key.

4. Perform SP2-109-3.

5. Print the 400-dpi test pattern onto A3 (11”x17”) paper using SP2-902-2 no.12
(cross stitch). (See Service Tables - Test Pattern Printing - Section 4.2.3, pasted below.)

6. Write the value of SP2-109-1 on the test pattern which was input at step 2.

7. Change the value of SP2-109-1 and print another test pattern, repeating steps
2 to 5. Print about 5 patterns with different values for SP2-109-1 (e.g. “48”, “96”,
“192”, “240”).

8. Check this test pattern. If the laser beam pitch is not correct, the image looks
like a black vertical stripe pattern.
NOTE: If the laser beam pitch is correct, the vertical stripe is not so noticeable.
If the value is not correct, the vertical stripe pattern is darker.

9. Adjust the laser beam pitch position until the thin lines are of uniform thickness
(no striping effect should appear on the printout), doing steps 2, 3, and 4. (In
step 2, input a value which is estimated to be correct, then do steps 3 and 4,
then if necessary go back to step 2 and try another value.)

10. After adjusting the laser beam pitch for 400 dpi, adjust the laser beam pitch for
600 dpi, using the same procedure as for 400 dpi (use the SP modes for 600
dpi).

.

4.2.3 TEST PATTERN PRINTING (SP2-902)
NOTE: Do not operate the machine until the test pattern is printed out completely.
Otherwise, an SC may occur.

1. Access the SP mode which contains the test pattern you need.

2. Press exit, then touch the “Copy Mode” key on the operation panel to access
the copy mode display.

3. Select the paper size.

4. Press the “Start” key to print the test pattern.

5. After checking the test pattern, exit copy mode by touching the “SP Mode” key.
Reset the test pattern to 0.

6. Exit the SP mode.

.
Test Pattern Table (SP2-902-2: Test Pattern Printing – IPU)
No. Test Pattern
-
0 None
1 Grayscale 1
2 Grayscale 2
3 Grayscale 3
4 Grayscale 4
5 Grayscale 5
6 Vertical Lines (256-greyscale) 13 Cross Stitch (600 dpi)
7 Vertical Lines (1-dot)
8 Vertical Lines (2-dot)
9 Hatch Pattern
10 Cross Pattern
11 Slant Pattern
12 Cross Stitch (400 dpi)
.

Test Pattern Table (SP2-902-3: Test Pattern Printing – Printing)
No. Test Pattern
-
0 None
1 Vertical Line (1-dot)
2 Horizontal Line (1-dot)
3 Vertical Line (2 dot)
4 Horizontal Line (2-dot)
5 Grid Pattern (Single-dot)
6 Grid Pattern (Double-dot)
7 Alternating Dot Pattern
8 Full Dot Pattern
9 Black Band
10 Trimming Area
11 Argyle Pattern
12 16 Grayscales (Horizontal)
13 16 Grayscales (Vertical)
14 16 Grayscales (Vert./Hor.)
15 16 Grayscales (Vert./Hor Overlay)
16 Not used
17 Horizontal Line (1-dot)
18 Grid Pattern (Single-dot)
19 Grid Pattern (Double-dot)
20 Alternating Dot Pattern
21 Blank Page

.

These adjusments listed in the manual require removal of a service panel and mechanical adjustment of the laser mounts, so it should be done by a qualified technician.

However, these test procedures can indicate whether or not this is the problem with your printer.

Dec 12, 2008 | Xerox WorkCentre 490CX All-In-One InkJet...

1 Answer

I have a Lexmark T632 that is used very often. Constantly printing over 1000 pages daily and I always get the error message Print head Error 934 - Lost Lock condition but once I shut down the printer and...


These error codes indicate a problem with the mirror motor circuit in
the printhead assembly or the mirror motor cable to the system board
cable or system board assembly. Check the continuity of the mirror
motor cable connected to J5 on the system board. If incorrect,
replace the cable. The voltage at J5-7 measures approximately
+24 V dc. If incorrect, replace the system board. If correct, replace
the FRUs in the following order:
• System board
• Printhead assembly

Dec 10, 2008 | Lexmark T632 Laser Printer

1 Answer

Horizontal line print errors


  1. Hold the cartridge upside down, with the bar-code label facing you.
  2. Take a damp paper towel and use it to wipe the printhead of the cartridge on the bottom (where the ink comes out). Wipe the printhead horizontally in one direction only (left to right).
  3. Continue doing this until the printhead looks clean.
  4. Then dab the cartridge on the towel to make sure the ink is flowing.
  5. Next, look inside the printer and locate the carrier that holds ink cartridges. Caution: Make sure the cartridges are not installed at this point.
    1. Look for a shiny piece of metal underneath the contacts at the back of the carrier.
    2. Take a damp cotton swab (use water only!) and wipe along the bottom of the shiny metal piece. Note: You may need more than one swab.
    3. And then perform This

  6. Press the Mode button on the operator panel until the Copy light comes on.
  7. Press the Menu button once to enter the menus.
  8. Press the down arrow button until you see Clean Cartridges.
  9. Press Select. The 'Clean nozzles' page will now print.

Oct 16, 2008 | Lexmark P4350 All-In-One InkJet Printer

2 Answers

Horizontal stripes on images


may be the ink level in ur ink jet printer is low try and use genuine ink for ur printer . i also have the same problem . when i replaced with original ink it gets ok

Dec 03, 2007 | Canon BubbleJet i560 InkJet Printer

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