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.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday, 5 March 2020

REPAIR / SERVICING TV LG M2762DL

Technical description and composition of the LG M2762DL TV, panel type and applicable modules. The composition of the modules.
LG
Model: M2762DL PC
Chassis / Version: LD93A
Panel: M270H1-L01 Rev. C1
Inverter (backlight): integrated into PSU
PWM Inverter: OZ9938GN
Trans Inverter: TMS94493CT
Power Supply (PSU): PLLM-M901D P / N: 3PAGC20002A-R Rev.1.0
PWM Power: STR-W6253
MainBoard: EAX62848101 (1) M20 / 22/23 / 2762D-PZL
IC MainBoard: LMD9201A-LF-SD, AP1W084D, 1006B, K4T51163QG-HCF7, 24C512, 24C08W, MX25L12845EM, LGE40RC-LF, WJCE6355, MAX232, LVC541A, TAS5709, 24C02B, APW70 AZ, AZW70 AZD8070
Control: KB33871424
Appearance
LG M2762DL
General recommendations for repairing TV LCD
If the TV does not turn on, the indicators on its front panel do not light up and do not blink, just as if the TV does not respond to the remote control and buttons, does not emit any sounds or any signs of operability when connected to the network, there is a certain probability of a PLLM-M901D power supply module and he needs repairs. Sometimes with similar manifestations a problem can only occur in the absence of standby power. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch in the STR-W6253 is detected, which is integrated with the PWM controller. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip STR-W6253 or broken resistors in its bundle.
PLLM-M901D includes a power converter for display backlight lamps - an inverter.
Sometimes the LG M2762DL TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the inverter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter by the inverter power. When disabling the inverter protection (to enable diagnostics), special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Diagnosis and repair of the EAX62848101 motherboard usually begins with a test of the performance of the stabilizers and power converters of the module chips. In some cases, a software update is required. Board repair and chip replacement LMD9201A-LF-SD, AP1W084D, 1006B, K4T51163QG-HCF7, 24C512, 24C08W, MX25L12845EM, LGE40RC-LF, WJCE6355, MAX232, LVC541A, TAS5709, 24C0210 AZG, AZD, AVI, WZGZZZZ, AVZ, AVZ, AVI, AVZ equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can sometimes be localized by the heating method.
Once again, remind users! Attempts to self-repair the LG M2762DL TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram ------------->  LG M2762DL Chassis LD93A 

 CHASSIS : LD93A; MODEL : M2762D, M2762D-P(W)ZL


 The appearance of the MainBoard EAX62848101 is shown in the figure below:
EAX62848101
The appearance of the power supply
Main features of the device LG M2762DL:
Installed matrix (LCD panel) M270H1-L01 Rev. C1.
To power the backlight, a converter is used, combined with a power supply, controlled by the OZ9938GN PWM controller. The transformer TMS94493CT is installed in the inverter converter.
The necessary supply voltages for all nodes of the LG M2762DL TV are generated by the PLLM-M901D power module or its analogs using STR-W6253 microcircuits.
MainBoard - the main board (motherboard) is an EAX62848101 module, using the LMD9201A-LF-SD, AP1W084D, 1006B, K4T51163QG-HCF7, 24C512, 24C08W, MX25L12845EM, LGE40RC-LF, WJCE6355C590, MAX322, MAX232, IC2 chip APW7080, LM324G, AZ1117D, AZ1085Z and others.
Additional technical information about the panel:
Brand: CMO
Model: M270H1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 27.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 597.888x336.312 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 0.8 / 2.6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V

Posted By: FRANK at 06:13
TAG: , , , ,