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 !

Saturday, 9 March 2019

JVC LT-32D50BJ SERVICE MODE AND ADJUSTMENTS

JVC LT-32D50BJ SERVICE MODE AND ADJUSTMENTS


JVC LT-32D50BJ

 SERVICE MODE AND ADJUTANTS 


SERVICE INSTRUCTIONS
FEATURES
DVB-T (DIGITAL TERRESTRIAL BROADCASTING)
This TV can receive both Digital terrestrial broadcasting (DVBT) and Analogue terrestrial broadcasting.
D.I.S.T. (Digital Image Scaling Technology)
This system uses line interpolation to double the number of
scanning lines and achieve high resolution, flicker-free picture.
COLOUR MANAGEMENT
This function ensures dull colours are compensated to produce natural hues.
PICTURE MANAGEMENT
This function makes it easier to see the dark areas when a picture has many dark areas, and makes it easier to see the bright areas when a picture has many bright areas.
ZOOM
This function can change the screen size according to the picture aspect ratio.
DIGITAL VNR
This function cuts down the amount of noise in the original picture.
SUPER DIGIPURE
This function uses the latest in digital technology to give you a natural-looking picture.
MOVIE THEATRE
This function displays a cinema film picture more smoothly and naturally on the screen.
3D CINEMA SOUND
You can enjoy sounds with a widerambience.
PIXEL FAULT
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting on and off. For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.
DARK FAULT
In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting. For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.
FLICKER FAULT
In the pixel fault, a cell that should light originally or not light originally is flashing on and off. For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on and off.
HOW TO ENTER THE SERVICE MODE
(1) Press [INFORMATION] key and [MUTING] key on the remote control unit simultaneously to enter the SERVICE MODE SCREEN.
(2) In the SERVICE MENU, press the [1] key to display ADJUSTMENT MODE SCREEN.
NOTE:
# Before entering the SERVICE MODE, confirm that the setting of VCR/TV/DVD switch is at the "TV" side. If the switches have not been properly set, you cannot enter the SERVICE MODE.
# When a number key other than the [1] to [3] key is pressed  in the SERVICE MODE SCREEN, the other relevant screen
may be displayed. This is not used in the adjustment procedure. Press the [MENU] key to return to the SERVICE MODE SCREEN
HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.
ADJUSTMENT
A-D OFFSET 625i
(1) Receive a 625i component ramp pattern signal.
(2) Set "PICTURE MODE" to STANDARD.
(3) Set "ZOOM" to FULL.
(4) Set "COLOUR TEMP." to NORMAL.
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031> (G DRIVE)
and < S032 > (B DRIVE) to "133".
(7) Set < S001 >(adjustment setting mode change to set "8" and it change to the 625i A-D offset adjustment setting mode.
(8) Adjust < S008 > (625i Cb offset) and < S009 > (625i Cr offset) to lose the gap (red line, green line and blue line) which appears at both ends of a white part at the centre of the screen.
(9) Set < S001 > to set "0" and it change to the normal mode.
(10) Press the [MUTING] key to memoirze the set value.
BRIGHTNESS
(1) Receive a 1125i (50Hz) gray scale pattern signal.
(2) Set "PICTURE MODE" to STANDARD.
(3) Set "ZOOM" to FULL.
(4) Set "COLOUR TEMP." to NORMAL.
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031> (G DRIVE) and < S032 > (B DRIVE) to "133".
(7) Set < S001 > (adjustment setting mode change) to set the values "12" and it change to the 1125i black level adjustment setting mode.
(8) Adjust < S012 > (1125i brightness) to set the 0% black part in the upper half of the screen to be brightest.
(9) Set < S001 > to set "0" and it change to the normal mode.
(10) Press the [MUTING] key to memoirze the set value.
A-D OFFSET 1125i (50Hz)
(1) Receive a 1125i (50Hz) 30% all white pattern signal.
(2) Set "PICTURE MODE" to STANDARD.
(3) Set "ZOOM" to FULL.
(4) Set "COLOUR TEMP." to NORMAL.
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Set < S030 > (R DRIVE), < S031> (G DRIVE) and < S032 > (B DRIVE) to "133".
(7) Set < S001 > (adjustment setting mode change) to set "13" and it change to the 1125i A-D offset adjustment setting mode.
(8) Adjust < S013 > (1125i Cb offset) to minimize the blue noise in the upper half of the screen.
(9) Set < S014 > (1125i Cr offset) to minimize the blue noise in the upper half of the screen.
(10) Set < S001 > to set "0" and it change to the normal mode.
(11) Press the [MUTING] key to memoirze the set value
SUB SCREEN A-D OFFSET
(1) Set "PICTURE MODE" to STANDARD.
(2) Set "ZOOM" to FULL.
(3) Set "COLOUR TEMP." to NORMAL.
(4) Set "MULTI SCREEN" to 2 pictures.
(5) Receive a PAL 30% all white pattern signal on the Right screen. At the same time, set the Left screen in VIDEO-1 mode (No signal).
(6) Select "1.ADJUST" from the SERVICE MODE.
(7) Set < S030 > (R DRIVE), < S031> (G DRIVE) and < S032 > (B DRIVE) to "133".
(8) Set < S001 > (adjustment setting mode change) to set "17" and it change to the sub screen A-D offset adjustment setting mode.
(9) Adjust < S016 > (Sub screen cb offset) to minimize the blue noise in the upper half of the screen.
If you select an adjustment item < S016 >, then the screen automatically turn to twin pictures mode.
(10) Adjust < S017 > (Sub screen cr offset) to minimize the red noise in the upper half of the screen.
(11) Readjust < S016 > and < S017 > to set the upper half of the screen to be the blackest.
(12) Set < S001 > to set "0" and it change to the normal mode.
(13) Press the [MUTING] key to memoirze the set value.
WHITE BALANCE (HIGHLIGHT)
(1) Receive a PAL 75% all white signal.
(2) Set "PICTURE MODE" to STANDARD.
(3) Set "ZOOM" to FULL.
(4) Set "COLOUR TEMP." to NORMAL.
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Adjust to Keep one of < S030 > (Red drive), < S031 > (Green drive) or < S032 > (Blue drive) unchanged, then lower the other two so that the all-white screen is equally white throughout.
NOTE: Set one or more of < S030 >, < S031 >, and < S032 > to "85".
(7) Check that white balance is properly tracked from low light to high light. If the white balance tracking is deviated, adjust to correct it.
(8) Press the [MUTING] key to memoirze the set value.
HOW TO ENTER THE SELF CHECK MODE
Before entering the SERVICE MODE, confirm that the setting of VCR/TV/ DVD switch is at the "TV" side. If the switches have not been properly set, you cannot enter the SERVICE MODE.
(1) Press the [INFORMATION] key and [MUTING] key simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key SELF CHECK MODE.
(3) Press the [RED (ZOOM)] key to enter Page 2 of the SELF CHECK MODE.
Use the [GREEN (3D SOUND)] key to toggle between Page 1 and Page 2.
NOTE: When a number key other than the [1] to [3] key is pressed in the SERVICE MODE screen, the other relevant screen may be displayed.
This is not used in the adjustment procedure. Press the [MENU] key to return to the MAIN MENU SCREEN.
HOW TO EXIT THE SELF CHECK MODE
To Save Failure History:
Turn off the power by unplugging the AC power cord plug when in the Self check display mode.
To Clear (Reset) Failure History:
Turn off the power by pressing the [POWER] key on the remote control unit when in the Self check display mode.
Posted By: FRANK at 04:38
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