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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Friday 15 March 2019

VESTEL 17MB18 - TFT LCD TV CHASSIS - ADJUSTMENTS & ALIGNMENTS _ SERVICE MODE

17MB18 - TFT LCD TV CHASSIS - ADJUSTMENTS & ALIGNMENTS _ SERVICE MODE


PW1306 - SERVICE MENU
In order to work with PW service menu:
  1. Press “Menu” (M) and “4” ”7” “2” “6” buttons of RC respectively.
  2. Make the desired settings.
  3. Press “Menu” (M) from RC to turn off the PW Service menu
  4. The menu has the following structure:
CLICK ON THE PICTURES TO ZOOM IN
# This value indicetes the horisontal positioning of the picture.
##   In this row “Software version and date is mentioned”
###  These will be changed according to the DI.
  • It is possible to move by using ▲, ▼, ◄, ► and “RIGHT” RC buttons in this menu structure.
UOC Horizontal Position
  • Press▼ RC button at “Service Submenu 1” to highlight “UOC H position”
  • Set the proper value to fit the applied pattern to screen by using ◄/► buttons.
UOC Calibration
  • Apply 11 Vertical bar Grey-scale pattern with black on the left and white on the right side of the picture(as seen below) from CVBS input.
  • Press RC “AV” button, and switch to CVBS input and observe the pattern applied.
  • Enter to PW1306 service menu.
  • Press RC “DOWN” button at “Service Submenu 1” and highlight “UOC Calibration”.
  • Press RC “RIGHT” button to start calibration.
DCXO Alignment
If this alignment has not properly been done, some front end RF problems can be observed such as Nicam stereo / mono sound switching, low RFreception and color separation performance.
Test Set-up
This alignment will be performed just after Tuner AGC Alignment. Apply “NICAM Stereo” and 60 dB PAL B/G RF signal from pattern generator. Frequency must be set to 224.25 MHz.
Turn on the TV.
  • Enter UOC service menu (as described above), and go to “DCXO Auto” setting.
  • Set “DCXO Auto” value to “1” by pressing “Volume +”.  TV will automatically align the DCXO (Digital Controlled Xtal Oscillator) value.  Then TV automatically re-sets “DCXO Auto” value to “0”. This indicates that DCXO Alignment successfully completed.
Tuner AGC Alignment. [A TV pattern generator with RF output and volt-meter are needed for this alignment.]
Test Set-up
“NICAM Stereo” and 60 dB PAL B/G RF signal from pattern generator will be applied.  Frequency must be set to 224.25 MHz.
Turn on the TV and measure the AGC voltage from Tuner Pin1 without plugging in any RF input (Around 4.12V).
  • Apply “NICAM Stereo” and 60 dB(1 mV) PAL B/G RF signal to the tuner input.
  • Enter UOC service menu (as described above), and go to “AGC Take over” setting by pressing “1” “1” “8”. 
  • Measure AGC voltage from Tuner Pin1. By pressing Volume +/-; adjust AGC voltage so that the measured value at this step should be 0,5V less than the value measured at first step (Around 3.5V).
PW1306 PC Input ADC Calibration
  1. Connect your TV with your PC and press RC “PC” button and observe the image.
  2. Press “M” to display Menu and select “Options” by using right button of RC.
  3. Press “Down” button of the RC and activate “auto adjustment”.
  4. Press right button of the RC to perform “auto adjustment” and press “M” to exit from Menu.
  5. Apply black on the left, white on the right(as seen below) XGA@60Hz (1024x768) pattern from PC.
  6. Enter PW1306 service menu as described above.
  7. Press RC “DOWN” button at “Service Submenu 1” and highlight “ADC Calibration”.
  8. Press RC “RIGHT” button to start calibration.
To initialize [Init] NVM
Press RC “RIGHT” button at “Service Submenu 1” and switch to “Service Submenu 2”
Press RC “DOWN” button and highlight “”Init NVM”
Press RC “RIGHT” button to set TV to initial settings. Next time TV is turned on, default settings will be loaded to TV.
To Initialize [Init] APS
Press RC “RIGHT” button at “Service Submenu 1” and switch to “Service Submenu 2”
Press RC “DOWN” button and highlight “”Initial APS”
Press RC “RIGHT” and “LEFT” buttons to set Initial APS to “on” or “off”.(When Initial APS is to “on” TV will display “Initial APS” menu at first time it is turned on.
Country
Press RC “RIGHT” button at “Service Submenu 1” and switch to “Service Submenu 2”
Press RC “RIGHT” button at “Service Submenu 2” and switch to “Service Submenu 3”
Press RC “DOWN” button and highlight ”Country”
Press RC “RIGHT” and “LEFT” buttons to set the desired country option.
Language
Press RC “RIGHT” button at “Service Submenu 1” and switch to “Service Submenu 2”
Press RC “RIGHT” button at “Service Submenu 2” and switch to “Service Submenu 3”
Press RC “DOWN” button and highlight ”Language”
Press RC “RIGHT” and “LEFT” buttons to set the desired language option.
Menu Background
Press RC “RIGHT” button at “Service Submenu 1” and switch to “Service Submenu 2”
Press RC “RIGHT” button at “Service Submenu 2” and switch to “Service Submenu 3”
Press RC “DOWN” button and highlight “Menu Background”.
Press RC “RIGHT” and “LEFT” buttons to set menu background to “opaque” or translucent.
Remote Control
Press RC “RIGHT” button at “Service Submenu 1” and switch to “Service Submenu 2”
Press RC “RIGHT” button at “Service Submenu 2” and switch to “Service Submenu 3”
Press RC “DOWN” button and highlight ”Remote Control”
Press RC “RIGHT” and “LEFT” buttons to set the desired remote control option.
Panel Type Change Shortcut
As 17MB18 software supports from 14” to 20” panel types, it is possible not to see anything on the screen after Init NVM as the default panel type is 15” in the software. That s why, a hidden menu is needed to change supported panel from a hidden menu which is not shown on the  screen.  In order to work with PW panel type selection shortcut service menu:
  • Press “menu” ‘M’ and 4-7-2-7 buttons of the remote control respectively. [No visual Menu will appear on the screen].
  • Press individual panel type selection digit to select the panel [Details given below].  When the TV turns ON again, it will come with new panel settings.
HIDDEN MENU PANEL TYPES
Posted By: FRANK at 06:07
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