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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..............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 !

Friday, 9 October 2020

PHILIPS 42PFL7403-F7, VIZIO SV420XVT1A, VIZIO SV431XVT, LG42LH20, LG42LH50, LG42LH90 T-CON BOARDS WIRINGS SCHEMATICS



 42LG70, 42LG7000, PHILIPS 42PFL7403-27, PHILIPS 42PFL7403-F7, VIZIO SV420XVT1A, VIZIO SV431XVT, LG42LH20, LG42LH50, LG42LH90 T’Con boards interconnection details

42LG70 Interconnect

TV Models: LG 42LG70, LG 42LG7000, Philips 42PFL7403D/27, Philips 42PFL7403D/F7, Vizio SV420XVT1A

PANEL P/N: EAT56803001

Part Number: 6871L-2040D

T-con Board P/N:6870C-0202B

DESC or Panel Sticker Number: LC420WUF-SAA1



T-con PWB under shield. Be sure to reinsert screws before operating set with shield removed.

LD1:

Set In Stby: LD1 Off (Anode 0V, Cathode 0V)

Power On: LD1 Lit (Anode 12V, Cathode 0V)

Set On: LD1 Off (Anode 12V, Cathode 9.6V)

42LH20 Interconnect:  TV Models: 42LH20

PANEL P/N:

Part Number: 6871L-1596A

T-con Board P/N: 6870C-0240C

DESC or Panel Sticker Number: LC-420WXN/LC370WXN (or LC420WXESBA1)

Warning: T-con board under shield. Be sure to reinsert screws before operating set with shield removed.

P801 Pin-3 PWM-DIM, 3.15V (Max 100%) to 0.6V (Min 0%) Customer’s MENU backlight setting. However, this is not used on the T-CON Board.

Set In Stby: LED1 Off (Anode 0V, Cathode 0V)

Power On: LED1 Lit (Anode 3.3V, Cathode 0V)

Set On: LED1 Off (Anode 3.3V, Cathode 1.3V)

42LH50 Interconnect:  TV Models: LG 42LH50, LG 42LH5000, LG 42LH5010, VIZIO SV421XVT, SV422XVT

PANEL P/N:

Part Number: 6871L-4700F

T-con Board P/N: 6870C-4100D

DESC or Panel Sticker Number: LC420/470WUF-SBM1_SBL


Set In Stby: LD1 Off (Anode 0V, Cathode 0V)

Power On: LD1 Lit (Anode 3.3V, Cathode 0.7V) 30 seconds later,

Set On: LD1 Off (Anode 3.3V, Cathode 1.38V)

42LH90 Interconnect:  TV Models: LG 42LH90

PANEL P/N: EAT60665101

T-con Board P/N: 6870C-4000H

DESC or Panel Sticker Number: LC320/420/470/550WU_120Hz Control (LC420WUL-SBM1)

42LK520 Interconnect:  TV Models: LG 42LK520_530, LG 42CS570

PANEL P/N:

Part Number: 6871L-1973H

T-con Board P/N: 6870C-0309D

DESC or Panel Sticker Number: LC420WUF-SCA2 (DESC: V5 LC370/420WUD)


Panel Test:  To run the T-CON “Panel Test, remove the LVDS cables. Jump 12V to the 12V fuse. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black patterns show on screen.

Posted By: FRANK at 08:09
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