REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Monday 18 March 2019

EPSON L800 - EPSON L801 - PRINTER HOW TO ADJUST [PG] (PLANTEN GAP) -

HOW TO ADJUST [PG] (Planten Gap) - EPSON L800 - EPSON L801 - PRINTER



PG ADJUSTMENT
   Adjust the distance between the head surface and the Paper Guide Front Assy (platen) properly and adjust the parallelism on the 0th column side and on the 80th
columns side to ensure reliable print quality.  Once the Carriage Assy and/or Adjustment Bushes have been removed or whenever necessary for any other reason, make this adjustment to correct the deviation of the platen gap.

Position

PG Size (mm)
Application for Printing (selected from PG flag list for
normal/head rubbing)
Sequence
Application
PG-APG Home

1.2
EPSON special thick paper
PGPP, Postcards, Matte, etc.
Cleaning
CR measurement,
VH detection
CR home position
Seek
PG typ. Mechanical
default

1.7
Plain paper
EPSON special thin paper, SF, etc.
Rubbing with PG1.2 is avoided

PG+

2.35
Envelopes
Rubbing with PG1.2 and 1.7 is avoided

PG++
4.2
CD-R printing
At ink replacement

TOOLS
Thickness gauge:  1.15 mm (x2).  1.3 mm (x2) & Phillips screwdriver.
The thickness gauge to be used must be free from dust and dirt and from deformation. Be sure to clean it before use.
Take care that the Print Head is not soiled or scratched.
To ensure high accuracy of adjustment, install the Adapters in the carriage, and move the carriage right and left by pulling the belt without holding the carriage.
  • Make this adjustment after installing the Printer Mechanism and CISS section. (Install the Linear Scale after adjustment.)
  • With L800/L801, four stages of PG setting are available by means of the APG Mechanism. However, make this adjustment with the mechanism in the minimum PG position (PG-: 1.2 mm). (Refer to “1.5.4 APG Unit” (p.41) and below.)
PG POSITION AT  PG ADJUSTMENT

Adjustment procedure
Specified PG value: 1.2 ± 0.1 mm
  • Install new ink cartridges in the carriage.
  • Remove the Cable Holder Frame.
  • Check that the APG Assy and the carriage are in the PG-position.
  • Move the carriage to the center of the platen, and place 1.15 mm thickness gauge on the left aligning its left edge with the second rib of the Front Paper Guide. And place another 1.15 mm thickness gauge on the right aligning its right edge with the rightmost rib of the Front Paper Guide.
NOTE: The thickness gauge must not be set over the leftmost rib on the Front Paper Guide.
  • Pull the Timing Belt to move the carriage to the left end.
  • If the carriage comes in contact with the gauge, adjust the Left Parallelism Bush to raise the carriage to a position where the Printhead does not come in contact with gauge.
  • Pull the Timing Belt to move the carriage to the right end.
  • If the carriage comes in contact with the gauge, adjust the Right Parallelism Bush to raise the carriage to a position where the Printhead does not come in contact with gauge.
  • Move the carriage to the middle area of the platen, and place 1.3 mm thickness gauges at the left and right ends of the platen.
  • Pull the Timing Belt to move the carriage to the left end.
  • If the carriage does not come in contact with the gauge, make the adjustment again.
  • Pull the Timing Belt to move the carriage to the right end.
  • If the carriage does not come in contact with the gauge, make the adjustment again.
  • Mark the indicated graduation position of the right and left Parallelism Bush, and tighten the screws. (Screw tightening torque: 0.8±0.1 N•m)
CLICK ON PICTURES TO ZOOM IN
Posted By: FRANK at 03:17
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