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!

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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 9 October 2020

LG42LN5200, LG42WT30, LG42WL10 , PANASONIC TH42LRU60, SANYO DP42D23, LGL42L80, LG47GA6400 T-CON BOARDS TIMING CONTROL BOARDS INTERCONNECTIONS SCHEMATICS

 42LN5300 Interconnect:  TV Models: LG 42LN5200 5300 5400 5700, LG 42WT30, LG 42WL10, Panasonic TH-42LRU60, Sanyo DP42D23 P42D23-00 & P42D23-11

PANEL P/N: EAJ62310701

Part Number: 6871L-3403A

T-con Board P/N: 6870C-0452A

DESC or Panel Sticker Number: LC420DUE-SFR5, LC420DUE-SFR1 (similar to LC500DUE-SFR1)

Warning: Be sure to install the screws in the T-CON board before applying power. Damage to the board will occur.

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.



LG 42LN5300 P1100 (Mainboard) CN1 (T-CON board) Connector Video Waveforms

All LVDS signals are taken with SMPTY Color Bar signal input (1080P)

Component Input. All LVDS signals are “Differential Pairs”. The ones shown are the “Positive” signal of the pair. The Negative signal looks exactly the same but flipped 180 degree. Scope Settings are 100mV per/division, 2.5uSec per/division.

42LV5500 Interconnect:  TV Models: LG 42LV5400, LG 42LV5500, LG 42LW5300

PANEL P/N: EAJ61749101

Part Number: 6871L-2693A

T-con Board P/N: 6870C-0358A

DESC or Panel Sticker Number: LC420EUF-SDA1 (V6 32/42/47 FHD 120Hz)

Warning: T-CON Board under shield. Be to reinsert screws before operating set with shield removed.

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

Note: Before doing the Panel Test, make sure their backlight can lit/operating normally.

 


 

42SL80 Interconnect: TV Models: LG 42SL80

PANEL P/N: EAT60667401

Part Number: 6871L-1828A

T-con Board P/N: 6870C-0259A

DESC or Panel Sticker Number: LC420WUD-SBM4 (42/47 Slim & Narrow 240Hz CONTROL)



47GA6400 Interconnect:  TV Models: LG 47GA6400

PANEL P/N: EAJ62270801

Part Number: 6871L-3264A

T-con Board P/N: 6870C-0444A

DESC or Panel Sticker Number: LC470EUN-SFF2 (DESC: LC470DUE-SFR1)

Warning: Return the screws when servicing the T-CON board with shields removed.

Concerning Quick Start:  If Quick Start is turned on in the Options Menu, T-CON 12V will be available during STBY, but there will be no video to process. Also, no Backlight.

CN2: Global Dimming

(1) Scan 1, (2) Scan 2, (3) Scan 3, (4) GND.  Pins are inverted on inverter.

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




Posted By: FRANK at 08:03
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