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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..............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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Friday, 29 March 2019

MAGNAVOX - SYLVANIA AND EMERSON- 40 INCH LCD TVS - SERVICE MODE AND ADJUSTMENTS – INITIALIZE – SMPS SCHEMATIC (CIRCUIT DIAGRAM)

MAGNAVOX - SYLVANIA and EMERSON- 40 Inch LCD TVs - Service Mode and Adjustments – Initialize – SMPS Schematic (Circuit Diagram)

40” 40MF430B/F7 MAGNAVOX _ 40” 40MF430B/F7 MAGNAVOX _ 40”LC407SS1 SYLVANIA _ 40” LC407SS1 SYLVANIA _ 40” LC407SS1 SYLVANIA _ 40” LC407EM1 EMERSON

Universal Remote control Set-up codes.

MAGNAVOX: 0018 0042 0049 0101 0152 0680

EMERSON: 0004 0042 0049 0065 0101 0113 0119 0145 0152 0166 0191 0214 0215 0225 0324 0378 0421 0456 0460 0604 0611 0654

SYLVANIA: 0392

ICs used in the main power regulator board [SMPS].

MIP2F30MSSCF (Switching) _ LTV817MCF (Opto-Coupler) _ HPA00651DR ( Switching Control) _ 2SK3561 (Switching FET) _ TK5A500 (Switching FET) _ TEA1611T (High-voltage Resonant Control)

SERVICE MODE
* Turn the power on.
* Press [MENU] button to display Setup menu.
* Select “Features”.
* Select “Current Software Info”.
* Press [0] [4] [2] [5] [7] [4] & [Info] buttons on the remote control unit in this order. The following screen appears.

PURITY CHECK MODE

This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
> Enter the Service mode.
> Each time pressing [7] button on the remote control unit, the display changes as follows.

WHITE BALANCE ADJUSTMENT

The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA

Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.

> Operate the unit for more than 20 minutes.
> Input the White Raster(70%=70IRE, 40%=40IRE)

> Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown. Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
> Enter the Service mode. Press [VOLUME DOWN] button on the remote control unit and select “C/D” mode.

CUT-OFF

* Press [1] button to select “COR” for Red Cutoff adjustment. Press [3] button to select “COB” for Blue Cutoff adjustment.
DRIVE
* Press [4] button to select “DR” for Red Drive adjustment. Press [6] button to select “DB” for Blue Drive adjustment.

* In each color mode, press [CHANNEL UP/DOWN] buttons to adjust the values of color.
Adjust Cutoff and Drive so that the color temperature becomes 12000°K (x= 0.272 / y=0.278 ±0.005).
To cancel or to exit from the White Balance Adjustment, press [PREV CH] button.

HOW TO INITIALIZE THE LCD TV

The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to select a language and program channels after the set has been initialized. To put the program back at the factory-default, initialize the LCD TV using the following procedure.
* Turn the power on.
* Enter the service mode. To cancel the service mode, press [POWER] button on the remote control unit.
* Press [INFO] button on the remote control unit to initialize the LCD television.
INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is completed.

POWER SUPPLY [SMPS] SCHEMATIC (Circuit Diagram)

Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F1601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail.