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 !

Thursday 31 January 2019

LG 26LC7R, LG26LC7R-MD 26 INCH LCD TVS – HOW TO UPDATE THE FIRMWARE – EDID/DDC DATA DOWNLOAD - LP78B CHASSIS

LG 26LC7R, LG26LC7R-MD 26 Inch LCD TVs – How to update the firmware – EDID/DDC DATA download - LP78B chassis

 
PCB assembly adjustment items
1) Download the VCTP main software (IC500,VCT_Pro)
2) Channel memory (IC501,EEPROM)
3) Color carrier Adjustment SET assembly adjustment items
1) DDC Data input.
2) Adjustment of White Balance.
3) Factoring Option Data input
PCB assembly adjustment method (Using VCTP Download program)
Download program installation
(1) Extract a Zip file
(2) Visual I2C & LPT Driver Installation
Install the LPT Driver
Install the Visual I2C
Click on the pictures to magnify
LPT Port Driver (LptDrv) Setups : Program Files > Micronas > Visual I2C > Port_Driver
*Use for Windows 95/98 : Setup_LptDrv_v0104_9x.exe
*Use for Windows 2000/XP : Setup_LptDrv_v0202_XP_2000.exe
*Use for Windows NT : Setup_LptDrv_v0104_NT.exe
(3) Verification (Start > Programs > Micronas >Visual I2C or LptDrv)
(4) LPT delay setting (File > Preference > LPT preferences)
 (5) Exchange the bootloader.bat file.
=> Select the "Bootloader.bat" file(install > VCTP_download > Bootloader)
=> Push "OK"
=> Finish the program, after saving the file "download_cs.vi2c"  (if you click [X] , the massage appears automatically)
S/W program download
(1) Download method 1 (PCB Ass’y)
Connect the download jig to D-sub jack.
2) Execute ‘Download.vi2c’ program in PC, then a main window will be opened.
3) Double click the blue box and confirm "Bootloader Version"
4) Click the "Erase Flash" button.
5) Double click the download file low, then "edit" window will be opened.
6) Click the choice button in the “edit window”, then “file choice window” will be opened.
7) Choose the Hex file in folder and execute downloading with click " open" button.
8) Click OK button at the "edit window".
9) Under downloading process
10) If download is failed, for example "No acknowledge from slave". Execute download again from(1).
(2) Download method 2 (AV Plate Ass’y)
Push S/W ‘ON’(connect SCL to GND using switch at Jig) and connect the download jig to D-sub jack.
2) Supply the power (Stand-by 5V) and wait for 3 seconds.
3) Push the S/W off (Disconnect SCL to GND using switch at jig).
4) Execute ‘Download.vi2c’ program in PC, then a main widow will be opened.
5) Double click the blue box and confirm "Bootloader Version"
6) Click the "Erase Flash" button.
7) Double click the download file low then, "edit" window will be opened.
8) Chick the choice button I n the "edit window", then "file choice window’ will be opened.
9) Choose the Hex file in folder and execute downloading with click "open button"
10) Click OK button at the "edit window"
11) Under downloading progress.
12) If download is failed, for example "No acknowledge from slave", execute download again from (1).
(3) Download method 3 (SET)
1) Push the “Tilt” button in an Adjust Remote control Then the LCD TV will change a “slave mode”.
2) Connect Zig to TV using a D-sub cable.
3) Execute ‘Download_CS.vi2c’ program in PC, then a main widow will be opened
4) Click "GO" button
[If you don’t push the “go”, the Hex file would not be downloaded although the download proceeds normally at first glance.]
5) Double click the blue box and confirm "Bootloader Version"
6) Click the "Erase Flash" button
7) Double click the download file low then, "edit" window will be opened.
8) Chick the choice button I n the "edit window", then "file choice window’ will be opened
9) Choose the Hex file in folder and execute downloading with click "open button"
10) Click OK button at the "edit window"
11) Downloading
12) If download is failed, for example "No acknowledge from slave", execute download again from (1)
Chancel memory download
(1) Connect the download jig to D-sub jack.
(2) Execute ‘Channel.vi2c’ program in PC, then a main window will be opened
(3) Push the button change and select the Channel memory data
(4) Check the communication is OK or not.
=> Push the Read area (Ackn. Check) and check Cyan area is OK message.
(5) Push the Update NVM from File
Tool Option Area Option Change
Before PCBA check, have to change the Tool option and Area option
Option values are below
(If no changed the option, the input menu can differ the model spec.)
The input methods are same as other chastises (Use adj Key on the Adjust Remote control)
EDID (The Extended Display Identification Data ) /DDC(Display Data Channel) download
Caution
- Use the proper signal cable for EDID Download.
- Never connect HDMI & D-SUB Cable at the same time.
- Use the proper cables below for EDID Writing.
Required Test Equipment
(1) Adjusting PC with S/W for writing EDID data.(S/W : EDID TESTER ver.2.5)
(2) A Jig for EDID Download.
(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub 15Pin cable, DVI to HDMI cable.
Preparation for Adjustment
(1) As above Fig 5, Connect the Set, EDID Download Jig, PC&Cable.
(2) Turn on the PC & EDID Download Jig. And execute the S/W : EDID TESTER Ver.2.5.
(3) Set up the S/W option.
Repeat Number : 5
Device Address : A0
PageByte : 8
(4) Power on the Set.
Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data
2) Load the EDID data. (Open file)
[Analog - RGB : LP78B_RGB.ANA]
[Digital - HDMI1 : LP78B_HDMI1.DVI]
[Digital - HDMI2 : LP78B_HDMI2.DVI]
3)Set the S/W as below
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message. Adjustment of White Balance Purpose and Principle (1) Purpose: Adjust the color temperature to reduce the deviation of the module color temperature. (2) Principle: To adjust the white balance without the saturation,Fix the one of R/G/B gain to 80 and decrease the others. Adjustment mode Two modes of Cool and Warm (Medium data is automatically calibrated by the cool data)
 Required Equipment (1) Remote control for adjustment (2) Color Analyzer (CA-110 or CA-210 or same product) - ch9 (3) Auto W/B adjustment instrument(only for Auto adjustment)
Connecting diagram of equipment for measuring (For Automatic Adjustment)
Enter the adjustment mode of the white balance
Enter the white balance adjustment mode at the same time heat-run mode when pushing the power on by power only key.
Maintain the white balance adjustment mode with same condition of Heat-run. (Maintain after AC off/on in status of Heat-run pattern display)
(2) Release the white balance adjustment mode
Release the adjust mode after AC off/on or std-by off/on in status of finishing the Hear-run mode
Release the Adjust mode when receiving the aging off command(F3 00 00) from adjustment equipment
Need to transmit the aging off command to TV set after finishing the adjustment.
Standard color coordinate and temperature when using the CA-110 or CA210 equipment.
R/G/B GAIN Max value > 80
Luminance Min value is 200cd/m2 in cool mode [for LCD]
Adjustment of White Balance
(For Manual adjustment)
Adjustment mode : Two modes of Cool (Dynamic) and Warm(Mild) (Medium data is automatically calibrated by the cool data)
Color analyzer(CA110, CA210) should be used in the calibrated ch by CS-1000.(LCD : CH9)
For manual adjustment, it is also possible by the following sequence
Operate the zero-calibration of the CA-110 or CA-210, then stick sensor to the module when adjusting.
(1) Select white pattern of heat-run by pressing “POWER ON” key on remote control for adjustment then operate heat run longer than 15 minutes. (If not executed this step, the condition for W/B will be differ )
(2) Changing to the av mode by remote control.(av mode : av1 or av2 or av3)
(3) Display the internal pattern of the VCT-Pro IC by pushing the IN-START.
(4) Stick sensor to center of the screen and select each items (Red/Green/Blue Gain and Offset) using D/E(CH ±) key on R/C.
(5) Adjust R/ G/B Gain using F/G(VOL ±) key on R/C.
(6) Adjust two modes of Cool(Dynamic) and Warm(Mild) as below figure. (Fix the one of R/G/B and change the others)
1) Push the one time the in-start key : Dynamic(Cool)
2) Push the two more the in-start key : Mild(Warm)
Refer to the below case to know what value is fixed.
CASE
First adjust the coordinate much away from the target value(x, y).
 x,y > target
1) Decrease the R, G.
 x,y < target
1) First decrease the B gain.
2) Decrease the one of the others.
 In case of decreasing the x, decreasing the R: fix G
 In case of decreasing the y, decreasing the G: fix R
 x > target, y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R 
 x < target, y > target
1) First decrease B, so make x a little more than the target
2) Adjust x value by decreasing the G.
(7) When adjustment is completed, Exit adjustment mode using EXIT key on R/C.
Input the Shipping Option Data
1) Push the ADJ key in a Adjust Remote control.
2) Input the Option Number that was specified in the BOM, into the Shipping area.
3) The work is finished, Push Stp Key.
Posted By: FRANK at 16:00
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