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 !

Friday 29 March 2019

APEX LD4688 - 46 INCH LCD TV - SOFTWARE UPGRADE - SMPS SCHEMATIC

APEX LD4688 - 46 Inch LCD TV - SOFTWARE UPGRADE - SMPS SCHEMATIC

Firmware update procedure_Power supply circuit diagram_ APEX LD4688 46" LCD TV

FIRMWARE UPDATE PROCEDURE

Set up the driver
1: First set up MProg 2.3/Drivers/CDM_Setup.exe, After set up, the PC can identify the CV2232.
2: Plug the USB port of the CV2232 to the PC, Set up the user settings. Open the MProg 2.3/ EEPROM_DATA/ MSTAR.ept, then point the button

put the data update to the EEPROM.

3: When update the software, please dip switch assigned to the end DEBUG.

Such as the picture connection
1 Make sure the CON2 (USB port) is connected with ， PC support 5v power for CV2232.
2 Using the VGA wire to connect the VGA-OUT with the VGA port of CV318.
3 The position of the button such as the picture. ALL down!
4 Last, make sure the CV318. plug into 12V power.

SOFTWARE TOOL
The software update tool is ISP_TOOL V4.4.0.4of Mstar: ISP_TOOL V4.4.0.4.exe, This software is portable software , no install ,direct copy the file to PC ,t hen you can use it , if the hardware is connected , please according to this step to update the software.

SETUP
If it is the first run the program, need setup ,point “Connect”button:
Point “Connect”button , If the hardware board plug into 5V power. ISP_TOOL V4.4.0.4 will be auto select the USB port. You must select the speed yourself, but the max speed not to exceed more than the 420KHZ. The picture as that is OK.

Select the Flash style, point the“Connect”button, the software Tool will be auto select the Flash. Then the connect is OK, you can go to the next step.

Point “Read”, read the program need to burn.

Point ”Auto”button ,enter burning interface Now ,point the interface of the ”Run” button ,can begin to burn the program at once . At the burning process ,make sure the TV power already connect and in boot-strap state.

Caution: if you operate the step 3, can’t select the device type, such as First , make sure the wire is connected, check the hardware. And check the CV119x plug into 12V power.Then you can pull out the USB port ,and insert the USB port once again, as well as the plug power of CV318, or close the ISP_TOOL V4.4.0.4 , and open it.Time after time. And check the speed don’t be more than the 420KHZ, reduce the speed.

Upgrade by U-disk
1 Format the U-disk(remark: pls save all the date in the U-disk before format)
2 Copy software to the U-disk root corresponding (software :bin document)
3 Insert U-disk into SERVICE interface on condition of turn off power
4 Power on and then procedure can upgrade automatic.
5 After upgrading ,disconnect U-disk ,upgrading will be finish when restart power (upgrading finish after blue light stop glinting )

How to access factor

Enter the motherboard:INPUT+2580

SMPS SCHEMATIC