Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 13 March 2019

MITSUBISHI - WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927 - OPTICAL ENGINE ADJUSTMENT

TEST SIGNAL ACTIVATION

Press “MENU-2-4-5-7” (Service Mode)
Press “REW” (Test Pattern).

Mechanical Optical Engine Adjustments are made using the UNIT-ADJUSTER shown in Figure.The UNIT-ADJUSTER is mounted under the Light Engine on the Engine Plate. It is accessed from the front of the set through the opening for the Card Reader. Refer to the model specific Disassembly Instructions and remove the:
Back Cover
Speaker Grille
Card Reader

ACCESSING MECHANICAL ADJUSTMENTS

WD-52627 / 62627 / 52628 / 62628

Pull Speaker Grille out.
Remove (2) screws (A) and pull Card Reader to access adjustment.

WD-62827

Remove (6) screws (A) to remove card reader cover.
Remove (2) screws (B) to remove card reader.

WD-62927

Pull Pedestal Cover out. Adjustment is now accessible.

WD-73727 / 73827

Pull the Panel Caps from the unit to remove them.

Remove (4) screws (A) to pull out entire Card Reader Unit.

WD-73927

Remove (16) screws (A). 8 on each side. (Remove only the outside screws. Do not remove inside screws; they are for the Screen Frame)

Pull Front Panel Escushions from unit.

Remove (8) screws (B) and remove the Pedestal Cover. Mechanical adjuster is now accessible

Locking Screws and Wedge Removal

Before mechanical adjustments can be made, locking screws must be loosened.

[B-1] is located on the front of the UNIT-ADJUSTER.

In 52” and 62” models [B-2] is accessible from the rear of the unit on the right side of the Optical Engine

WARNING: DO NOT loosen [B-2] too far. The nut on the other side may drop off. Then Optical Engine must be removed to re-install the nut.

In 73” models, loosen the 4 screws [C] in the Joining Bracket.

Remove the rubber wedge shown in

ADJUSTMENT PROCEDURES

Adjustment Locations

The Mechanical Adjustments are accessed though the opening for the Card Reader. Locations of the Adjustments are shown below

CAUTION: Do Not force an adjustment past the end of it’s range, UNIT-ADJUSTER damage may result.

Rotation Adjustment

Horizontal Keystone Adjustment

Adjust [A-2] to remove any picture rotation.

Vertical Keystone Adjustment

Adjust [A-3] to remove horizontal keystone distortion. NOTE: Vertical Positioning may shift.

Adjust [A-1- To remove vertical keystone distortion. [A-1] can only be accessed by the front access hole shown above. NOTE: Horizontal Positioning may shift.