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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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 !

Wednesday, 10 April 2019

TROUBLESHOOTING – LG TCON BOARDS - LC420WUN-SAA1 (6870C-4200C) - LC420WX5-SLA1 (6870C-0113A) - LC420WX7 (6870C-0150B) - LC470WU4-SLA1 (6870C-0120C) - LC520WU1-SLA1 (6870C-0152A)

Troubleshooting – LG TCON Boards - LC420WUN-SAA1 (6870C-4200C) - LC420WX5-SLA1 (6870C-0113A) - LC420WX7 (6870C-0150B) - LC470WU4-SLA1 (6870C-0120C) - LC520WU1-SLA1 (6870C-0152A)

LG -LC420WUN-SAA1 (6870C-4200C) - LC420WX5-SLA1 (6870C-0113A) - LC420WX7 (6870C-0150B) - LC470WU4-SLA1 (6870C-0120C) - LC520WU1-SLA1 (6870C-0152A)
A) LC420WUN-SAA1 (6870C-4200C)
LCD Panel Model: 42 inches HD Panel
Vcc input= 12V
1) PGAMMA: BUF22821.
If this IC failed, it will cause No Display or Missing Colors.
2) U35= CY25560.
If this IC failed, it will cause No Display.
3) UC1= TL2412MC.
If this IC failed, it will cause  No Display or Display Distortion problem.
4) U5= TPS65162 power management IC.
If this IC failed, it will cause No Display.
B) LC420WX5-SLA1 (6870C-0113A)
LCD Panel Model: 42 inches Panel
Vcc input= 12V
1) U7= TPS65161 is a power management IC.
 If this IC failed, it will cause No Display.
2) U5 is a SDRAM memory IC.
If this IC failed, it will cause No Display or Display Distortion problem.
3) UC1= R8A0102SFP.
If this IC failed, it will cause No Display or Rainbow Display problem.
4) U4 is an EEPROM IC.
If this IC failed, it will cause No Display or White Screen problem.
C) LC420WX7 (6870C-0150B)
LCD Panel Model: 42 inches Panel
Vcc input=12V
1) U7= TPS65162 is a power management IC.
If this IC failed, it will cause No Display.
2) U5 is a SDRAM memory IC.
If this IC failed, it will cause No Display or White Screen problem.
3) UC1= R8A01028AFP.
If this IC failed, it will cause No Display, White Screen or Rainbow Display problem.
D) LC470WU4-SLA1 (6870C-0120C)
LCD Panel Model: 47 inches Panel
Vcc input= 12V
1) U401 SDRAM.
If this IC failed, it will cause No Display or Display Distortion problem.
2) UC101= R8A00014BF.
If this IC failed, it will cause No Display or White Screen problem.
3) U101 EERPOM memory IC.
If this IC failed, it will cause No Display.
4) U202= TPS65161 power management IC.
If this IC failed, it will cause No Display.
E) LC520WU1-SLA1 (6870C-0152A)
LCD Panel Model: 52 inches Panel
Vcc input= 12V
1) PWM1= TPS65161 power management IC (DC-DC circuit IC).
If this IC failed, it will cause No Display.
2) UC8= EP2C35F484C7N.
If this IC failed, it will cause  No Displayor Display Distortion problem.
3) OSC1= 50MHz crystal.
If this component failed, it will cause No Display or Rainbow Display on the screen.
4) SDRAM1 is a SDRAM memory IC.
If this IC failed, it will cause  No Display or Rainbow Display problem.
Posted By: FRANK at 04:23
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