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 !

Tuesday, 5 February 2019

JVC DYNAPIX HD LCD TV – LT26X70 – LT32X70 – LT40S70 – LT40DS7 LED BLINKING CODES - SERVICE MODE AND ADJUSTMENTS – SMPS SCHEMATIC

JVC DynaPix HD LCD TV – LT26X70 – LT32X70 – LT40S70 – LT40DS7 LED blinking codes - Service mode and adjustments – SMPS schematic

Applicable to: JVC DynaPix HD LT-26X70BU, LT-26X70SU, LT-32X70BU LT-32X70SU, LT-40S70BU, LT-40S70SU, LT-40S70ZU, LT-40DS7BJ, LT-40DS7BJ/P, LT-40S70BU, LT-40S70BU/P, LT-40S70SU, LT-40S70SU/P, LT-40S70ZU, LT-40S70ZU/P – Power Supply –SMPS circuit diagram, Service Mode, Memory replacement, LED Blinking codes - Universal Remote control set-up codes to check with JVC brand TVs and more..
SYSTEM SETTING
Be sure to carry out the following operation at the end of the procedure
(1) Press the [INFORMATION] key and [MUTING] key simultaneously, then enter the SERVICE MODE.
(2) When the Main Menu is displayed, press [2] key to enter the self check mode.
(3) Turn off the power by pressing the [POWER] key on the remote control unit.
HOW TO IDENTIFY MODELS
Except "/P" models : "AE" is added to the serial No. after at the Rating label.
"/P" models : "PE" is added to the serial No. after at the Rating label.
LCD PANEL
This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the conventional CRT (Cathode Ray Tube), as a display unit.
Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.

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.
CAUTION AT DISASSEMBLY
• Be sure to perform the SYSTEM SETTEING, at the end of the procedure.
• Make sure that the power cord is disconnected from the outlet.
• Pay special attention not to break or damage the parts.
• When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers) makes service procedure manageable.
• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.
MEMORY IC REPLACEMENT
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
MEMORY IC TABLE
MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting values.
3. Power on
Connect the power plug to the AC outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.
5. User setting
Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING INSTRUCTIONS and set the items as described.
Smps SFL-9045A-U2 schematic
Sub Power
DC-DC circuit
SMPS PWB
SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary Refer to the SERVICE ADJUSTMENT for setting.
SETTINGS OF FACTORY SHIPMENT
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.
[Before enter the SERVICE MODE, press the [MODE] key to confirm that "TV" position is indicated. If it is in a wrong position, the SERVICE MODE operation cannot be performed.
When a number key other than the [1] 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 MODE
This mode is used to adjust the VIDEO CIRCUIT and the MTS CIRCUIT.
HOW TO ENTER THE ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [1] key to enter the ADJUSTMENT MODE.
ZOOM MODE
State of the SCREEN SIZE or MULTI PICTURE is displayed.
SETTING ITEM NAME
Setting item name are displayed. For the setting item names to be displayed, refer to "INITIAL SETTING VALUES IN THE SERVICE MODE".
SETTING ITEM NO.
Setting item numbers are displayed.
CHANGE AND MEMORY OF SETTING VALUE
SELECTION OF SETTING ITEM
• [FUNCTION Up / Dn] key.
For scrolling up / down the setting items.
S001...S009 <->T001...T003 <-> M001...M224 <->
F001...F002 <-> D001 <->  Z001 <-> return to S001
CHANGE OF SETTING VALUE (DATA)
• [FUNCTION Up/Dn] key.
For scrolling up / down the setting values.
MEMORZE the SETTING VALUE (DATA)
Changed setting value is memorized by pressing [MUTING] key.
HOW TO ENTER THE SELF CHECK MODE
Before enter the SELF CHECK MODE, press the [MODE] key to confirm that "TV" position is indicated. If it is in a wrong position, the SELF CHECK MODE operation cannot be performed.
(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] key to enter Page 2 of the SELF CHECK MODE.
*Use the [GREEN] key to toggle between Page 1 and Page 2.
[When a number key other than the [2] key is pressed in the SERVICE MODE screen, the other relevant screen may be displayed.  This is not used in the SELF CHECK MODE. Press the [MENU] key to return to the MAIN MENU SCREEN.]
HOW TO EXIT THE SELF CHECK MODE
Turn off the power by pressing the [POWER] key on the remote control unit.
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.
FAILURE HISTORY
Failure history can be counted up to 9 times for each item. When the number exceeds 9, display will remain as 9. Failure history will be stored in the memory unless it has been deleted.
[Only SYNC (with/without sync signals) will be neither counted nor stored.]
METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT [Blinking Codes]
In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED
If error is detected, the power is turned off.
Shortly after a power is turned off, POWER LED will be blinked.
Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.
Universal remote control set-up codes for JVC Televisions
0007 0018 0075 0103 0123 0154 0163 0170 0182 0214 0225 0409 0433 0465 0657 0670
Posted By: FRANK at 07:33
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