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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Tuesday, 1 September 2020

LG FLATRON L1733TR, L1933TR COLOR MONITORS HOW TO ENTER THE SERVICE MODE OF , EDID DATA WRITING - SCHEMATIC DIAGRAM

Video Controller Part.
This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the

digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 135MHz.
This part consists of the Scaler, ADC convertor, TMDS receiver and LVDS transmitter.
The Scaler gets the video signal converted analog to digital, interpolates input to 1280 X 1024 resolution signal and
outputs 8-bit R, G, B signal to transmitter.

Power Part.
This part consists of the one 3.3V, and one 1.8V regulators to convert power which is provided 5V in Power board.
12V is provided for inverter, 5V is provided for LCD panel.
Also, 5V is converted 3.3V and 1.8V by regulator. Converted power is provided for IC in the main board.
The inverter converts from DC12V to AC 700Vrms and operates back-light lamps of module.

MICOM Part.
This part is include video controller part. And this part consists of EEPROM IC which stores control data, Reset IC and
the Micom.
The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.


SERVICE mode

Turn off the power switch at the front side of the display.

Wait for about 5 seconds and press MENU, POWER switch with 1 second interval.

The SVC OSD menu contains additional menus that the User OSD menu as described below.

Auto Color : W/B balance and Automatically sets the gain and offset value.

NVRAM INIT : EEPROM initialize.(24C08)

CLEAR ETI : To initialize using time.
AGING : Select Aging mode(on/off).
R/G/B-9300K : Allows you to set the R/G/B-9300K value manually.
R/G/B-6500K : Allows you to set the R/G/B-6500K value manually.
R/G/B-Offset : Allows you to set the R/G/B-Offset value manually.(Analog Only)
R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only)
MODULE : To select applied module.

ADJUSTMENT To apply the MSTAR Chip.

Operating System: MS Windows 98, 2000, XP
Port Setup: Windows 98 => Don’t need setup
Windows 2000, XP => Need to Port Setup.
This program is available to LCD Monitor only.

1. Port Setup
a) Copy “UserPort.sys” file to “c:\WINNT\system32\drivers” folder
b) Run Userport.exe

c) Remove all default number
d) Add 300-3FF

e) Click Start button.
f) Click Exit button.

2. EDID Read & Write
1) Run WinEDID.exe

2) Edit Week of Manufacture, Year of Manufacture,
Serial Number
a) Input User Info Data
b) Click “Update” button
c) Click “ Write” button.

Set-up

Schematic

Scaler

Power & wafer

Inverter

Power