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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Saturday, 9 February 2019

SHARP LC-26GA5H/M/D _ SERVICE MODE _ SOFTWARE UPDATE PROCESS

SHARP LC-26GA5H/M/D _ SERVICE MODE _ SOFTWARE UPDATE PROCESS



ENTERING AND EXITING ADJUSTMENT [SERVICE] MODE

  • Before entering the adjustment process mode, press the "TV RESET" button or execute the AV position RESET in the video adjustment menu.
  • Unplug the AC cord from the outlet to make a forced shutdown.
  • While holding down the "VOL (–)" and "TV/VIDEO" keys at a time, plug the AC cord and turn on the power.  (The "VOL (–)" and "TV/VIDEO" keys should be pressed and held until the display appears.) The letter " K " appears on the screen.
  • Next, hold down the "VOL (–)" and "CH (DN)" keys at a time.  Multiple lines of blue characters appearing on the display indicate that the unit is now in the adjustment process mode.  When you fail to enter the adjustment process mode (the display is the same as normal start-up), retry the procedure.
  • To exit the adjustment process mode after the adjustment is done, unplug the AC cord from the outlet to make a forced shutdown. (When the power was turned off with the remote controller, once unplug the AC cord and plug it again. In this case, wait 10 seconds or so before plugging.).
Caution: Use due care in handling the information described here lest your users should know how to enter the adjustment process mode. If the settings are tampered in this mode, unrecoverable system damage may result.

REMOTE CONTROL KEY OPERATION IN SERVICE MODE

Remote controller key
Main unit key
Function
CH (UP/DN)
CH (UP/DN)
Moving an item (line) by one (UP/DOWN)
VOL (+/–)
VOL (+/–)
Changing a selected item setting (+1/–1)
Cursor (UP/DOWN)
  --------------------
Turing a page (PREVIOUS/NEXT)
Cursor (LEFT/RIGHT)
  --------------------
Changing a selected line setting (+10/–10)
TV/VIDEO
TV/VIDEO
Input switching (toggle switching).
(TV =>INPUT1=>INPUT2=>INPUT3)
ENTER
  ----------------------
Executing a function



##  Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.

SOFTWARE UPDATE

The adjustment values are set to the optimum conditions at the factory before shipping. If a value should become improper or an adjustment is required due to part replacement, make an adjustment according to the following procedure.


AFTER REPLACING ANY PWB UNIT AND/OR IC FOR REPAIR.
  • LCD CONTROL unit:

DUNTKC807FEB7 (LC-26GA5M)
DUNTKC807FEB8 (LC-26GA5X)
DUNTKC807FEB9 (LC-26GA5H)
  • CPU unit:

DUNTKC427FE47

UPGRADING OF EACH MICROPROCESSOR SOFTWARE

Caution: Never "POWER OFF" the unit when software upgrade is ongoing.  Otherwise the system may be damaged beyond recovery.


SOFTWARE VERSION UPGRADE
  • The model employs the following software. [1] Main software [2] Monitor microprocessor software.
The main software and the monitor microprocessor software can be upgraded by using a general-purpose SD memory card.
The followings are the procedures for upgrading, explained separately for each of the main software, the monitor microprocessor software.

MAIN SOFTWARE VERSION UPGRADE

TOOLS
  • SD memory card of 8MB or higher capacity
  • PC running on Windows 98/98SE/ME/2000/XP operating system
  • SD memory card formatting software
  • Downloadable by this link 
PREPERATIONS

To upgrade the main software, it is necessary to get ready the SD card for version upgrade before you start.
Follow the steps below and create the SD card for version upgrade.
  • Insert the SD card into the SD card reader/writer. Start the SD card formatting software. Click [Format].  (When you have the drive options, select the drive where the SD card is inserted before you proceed.)
  • When the formatting is over, the following window appears. Click [OK].



  • Click [Exit] to finish the formatting.
  • When you are done, take out the SD card once to make sure it is finished, and then insert it again.
  • Copy the binary image file KA1UAxxx.SDC (named temporarily) for version upgrade to the root directory (folder) of the SD card drive.
  • Note: In the SD card drive, do not store other folders or unrelated files, or more than one binary image files for version upgrade.
  • Now the SD card for version upgrade is ready.
TO UPGRADE
  • Shut off the AC power (i.e. unplug the AC cord).
  • Insert the SD card for version upgrade (prepared as above) into the service socket located below left of the right side cooling fan in the rear of the unit, in a way that the cut corner of the SD card comes at the right-hand side. 
  • Note: If the SD card is inserted in a wrong way, the card will go deep inside the unit beyond retrieval. Take due care to insert the SD card correctly.
  • While depressing the "SYSTEM RESET" button located below the RS-232C connector in the rear left side of the unit, turn on the AC power (i.e. plug in the AC cord).  
  • Note: After the unit is started, you may release the SYSTEM RESET button.
  • After the unit start up  the system upgrade screen as shown below appears within 10-20 seconds.
  • Even a single failure in the process will trigger the upgrade failure screen as shown below. The word "NG" changes to red for the item failed.  
  • Note: In the event of a failure, repeat the upgrading process. If the process repeatedly fails, it is likely that the hardware is troubled.
  • Upon completion of the whole process, the upgrade success screen as shown below appears. You can check the new software version on this screen. The version information appears after the upgrade is complete.
  • Shut off the AC power to the unit (unplug the AC cord), and remove the SD card for version upgrade.
    Now the software version upgrade is complete.  
  • Note: When you are done with the software version upgrade, start the set, go to the top page of the adjustment process screen and check the main software version information.
MONITOR MICROPROCESSOR SOFTWARE VERSION UPGRADE
  • Create the SD card for monitor microprocessor software version upgrade in the same manner as explained in the "Main software version upgrade". Copy the binary image file for monitor microprocessor software version upgrade to the SD card drive.
During the monitor microprocessor software version upgrade, the progress of upgrading is not shown on the display screen. The upgrading process is seen in the blinking of the power LED.
  • Shut off the AC power to the unit (i.e. unplug the AC cord).
  • Insert the SD card for version upgrade (prepared as above) into the service socket located below left of the right side cooling fan in the rear of the unit, in a way that the cut corner of the SD card comes at the right-hand side.  
  • Note: If the SD card is inserted in a wrong way, the card will go deep inside the unit beyond retrieval. Take due care to insert the SD card correctly.
  • While depressing the "SYSTEM RESET" button located in the rear left side of the unit, turn on the AC power (i.e. plug in the AC cord).  
  • Note: After the unit is started, you may release the "SYSTEM RESET" button.
Caution :: The moment this operation is done, the upgrading of the monitor microprocessor software starts.  While the upgrade is ongoing, never power off the unit. Otherwise the upgrade will fail and the system may have a serious damage beyond recovery (inability to start).
  • After the unit startup, the power LED starts blinking in green within 10-20 seconds.
  • Wait until the power LED stops blinking, the unit restarts automatically, and the normal startup screen appears (it will take 2-3 minutes).
  • Shut off the AC power to the unit (unplug the AC cord), and remove the SD card for version upgrade.
  • Now the software version upgrade is complete.
Note: When you are done with the software version upgrade, start the set, go to the top page of the adjustment process screen and check the monitor microprocessor software version information.
Posted By: FRANK at 02:27
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