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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Tuesday 12 March 2019

TCL LED - 28T3520 SERVICE MODE

TCL LED - 28T3520 SERVICE MODE


Overview 
MS306C/D chassis is designed for Asia Pacific/South America market. Both Full HD panel and HD panel can be compatible. The signal sources include TV,AV,YPBPR/YCBCR,VGA,HDMI and USB. For YPBPR,HDMI source ,Format up to 1080p can be supported; USB support image, audio and video(up to H.264)playing; The whole process of alignment includes ADC calibration and White Balance adjustments.
Factory Menu 
Methods of Entering Method 1

Using the remote ,enter the “Picture” submenu in the OSD; choosing the “contrast” item and press the 9,7,3 and 5 in series, Factory Menu will appear in the left top of screen

Method 2
Press RETURN button when FACTORY HOTKEY is enabled  (ON). 
General introduction.
ITEMS
Default Setting
Description
Status
1-FAC  HOTKEY




OFF




 Factory hotkey Switch (OFF/ON).Should be OFF after factory alignment

OK



2-WARM UP








OFF
OFF:The set would enter standby mode after 15 minutes without input signal;
 ON : Aging mode. Aging time will display on the left bottom of screen.

OK









3-ADC


ADC calibration(refer as follow)

OK

4-WHITE BALANCE









White Balance data adjustment(refer as follow) The balance data is set by PE before the mass production. Do not need adjust.



OK


5-SHOP





DO





 Reset the set after production alignment;(This operation will remove all unnecessary factory value; The factory hotkey will be turn off)

OK




6-NVM reset




DO





System initialization. Restore all data except the White Balance and ADC data ;Only for R&D.

OK



7-SET FAC CH






DO







Preset specific factory channels for specific factory. Press left and right button to select the factory, and then press OK to confirm.


OK





8-POWER ON




LAST
ON: Always turns on TV when AC power on STB:Always goes to standby mode when AC power on LAST:Restore the status before the last AC power off

OK




9-USB UPDATE


USB update

OK
10 ReloadEFBItem…


This item only factory used,



Design Menu
Methods of Entering
 Method
1 Using the remote, enter the “Picture” submenu in the OSD; choosing the “contrast” item and press the 1,9,5,and 0 in series,Design Menu will appear in the left top of screen. Method
2: Press RETURN button when DESIGN HOTKEY is enabled (ON).

Service Menu
Methods of Entering

Using the remote, enter the “Picture” submenu in the OSD; choosing the “contrast” item and press the 9,7,0 and 5 in series, Service Menu will appear in the left top of screen.


Debugging
General Steps of debugging
According to the requirement of the order, below steps are needed for appropriate setting.
1) Enter the Factory Menu, enable FAC HOTKEY.
2) Check Project ID and the version of software, release date displayed at the bottom of Factory Menu.
3) Enter Design Menu, choose SERVICE MENU->Project ID, choose corresponding Project ID number of the product (Refer to the “V6-PROJECT -ID0**”in the BOM list).
4) Return to Factory Menu, check the Product model.
5) Choose Factory Menu->NVM RESET and press the right button of the remote and wait until prompt OK appears.
6) Restart the set
7) According to the requirement of the order, Set the items of SHOP INIT and Hotel Menu etc.
8) After aging under normal temperature, calibrate ADC and adjust white balance.
9) Choose Factory Menu ->SHOP and press the button of remote to initialize the set. Note: After step
9, Hotel Menu will be disabled by default. Therefore, if the order requires hotel function, it is necessary to enable hotel function by set Design MENU->Service Menu->HOTEL ENABLE to ON.
ADC Calibration
Steps of Calibration:
1). Access to the Factory menu->ADC
2). select RGB source and see the 5 MOSAIC appear on the screen
3). Select AUTO ADC , Press the right button on the your remote to calibrate the ADC automatically.
4). Select YPBPR source and Repeat step
When the OK appears the calibration has been finished successfully.
White Balance adjustments (Manual)
Before adjustment ,you must make sure the ADC status(only PC and YPbPr) is “success”and Color Analyzer has been calibrated .Only AV1,YPbPr,PC,HDMI1 need to be adjusted. HDMI1 should be the first.
Signal and generator
The pattern of the signal should be used are White (Chroma2329 pattern 113) and Grey (pattern 114). The format of signal are respectively 720P for HDMI1 (Chroma2329 Timing 69),PAL (Chroma2329 Timing38) for AV1,1024X768@60Hz(Chroma2329 Timing14) for VGA and 720P(Chroma2329 Timing79) for YPbPr.
Steps of adjustment
1).Enter the factory menu-> White Balance, select source HDMI 1 and Normal Temperature.
2).Input grey signal in 720p format.
 3).Change R-OFFSET and B-OFFSET to make sure the value of color coordination equal to (X=0.280 +/-0.015;Y=0.290 +/-0.015). 4).Input white signal in 720p format.
 5). Change R-GAIN and B-GAIN to make sure the value of color coordination equal to (X=0.280 +/-0.015;Y=0.290 +/-0.015). 6).Repeat step 2—5 until both of the value of color coordination of white and grey equal to (X=0.280 +/-0.015;Y=0.290 +/-0.015). For COOL and WARM color temperature, just repeat step 2—5.The color coordination we recommend for COOL and WARM color temperature is respectively(X=0.270 +/-0.015;Y=0.270 +/-0.015) and (X=0.300 +/-0.015;Y=0.305 +/-0.015).
After the adjustment of HDMI1, you can switch to other source AV, PC and YPbPr and repeat step 1—6 to do the WB adjustment.
Note: For some small size LED panel,the color coordination of specifications is not X=0.280/Y=0.290,and we recommend you adopt the values from panel specifications.
Software update Method of SW update: 1 Download the bin file “MS306C_TCL.bin or MS306D_TCL.bin”to the root directory of your USB device (DO not change the file name); Then insert the USB device to USB interface of TV set.
 Note
MS306C_TCL.bin software update file is for MS306C chassis.
MS306D_TCL.bin software update file is for MS306D chassis.

Upgrading method 1
1,using the remote, enter the “Picture” submenu of the OSD; choosing the “contrast” item and press 9,7,3 and 5 in series, Factory Menu will appear in the left top of screen.
2,Select the “USB UPDATE” item , press left or right key to enter the update box;
3,Select “YES” of the dialog box and press OK button to start the update, you will see a progress box on the screen. 4,After updating , the set will reset automatically.
Upgrading method 2
1
Press the “MEUN”button of Remote Control, then select the“Software Update(U..>” item in “Option”sub-menu, press left or right key to enter the update box.
2 Press left button Select “YES” of the dialog box and to start the update, you will see a progress box on the screen.
3 After updating , the set will reset automatically.
Project ID selecting
1) Press the Menu button of remote control, then select Contrast item of Picture submenu; press 1,9,5,0 consecutively, there you go the Design Menu.
2) Select the SERVICE MENU item, press OK and RIGHT button of the remote to enter submenu,
3)Select the PROJECT ID item, press OK or RIGHT button of the remote to enter the submenu;
4)Press the right or left button of the remote to select the ID you want;
5) After ID selection, press MENU button of the remote to exit DESIGN MENU.
6)Finally, do AC power on/off.