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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday, 28 March 2019

SHARP LC20D42U - LCD TV - HOW TO UPGRADE THE FIRMWARE - SERVICE MODE

SHARP LC20D42U - LCD TV - HOW TO UPGRADE THE FIRMWARE - SERVICE MODE

How to upgrade the Firmware - Sharp LCD TV LC-20D42U
ADJUSTMENT PROCEDURE
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 replacement of any PWB unit and/or IC for repair, note the following.
When replacing the following units, make sure to prepare the new units loaded with updated software. 
MAIN Unit:DUNKE001FMF1
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.
Main Software
Monitor microprocessor software.
The main software and the monitor microprocessor software can be upgraded by using a general-purpose USB Memory.
The followings are the procedures for upgrading, explained separately for each of the main software, the monitor microprocessor software.
MAIN SOFTWARE VERSION UPGRADE
Get ready before you start.
> USB Memory of 128MB or higher capacity.
> PC running on Windows 98/98SE/ME/2000/XP operating system.
> USB Memory reader/writer with USB connectivity.
Preparations
To upgrade the main software, it is necessary to get ready the USB Memory for version upgrade before you start.
Follow the steps below and create the USB Memory for version upgrade.
> Copy the file 42LTAxxx.USB(named temporarily) for version upgrade to the root directory (folder) of the USB Memory.
NOTE: In the USB Memory drive, do not store other folders or unrelated files, or more than one files for version upgrade.  Now the USB Memory for version upgrade is ready.
HOW TO UPGRADE THE SOFTWARE
> Unplug the AC cord. (Make sure AC power shut down more than 1 minute.)
> Insert the USB Memory for version upgrade (prepared as above) into the service socket located Right side from center at terminals, above HDMI4 terminal in the rear of the unit.
>>
Plug in the AC cord with power button pressing after 5 seconds later, release the power button. [SERVICE MODE]
> After the unit start-up, the system upgrade screen as shown below appears within 20-40 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.
> Unplug the AC cord and remove the USB Memory 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 UPGRADE
Create the USB memory for monitor microprocessor software version upgrade in the same manner as explained in the "Main software version upgrade".  Copy the file 42LTMxxx.USB and 42LTMxxx.BIN(named temporarily ) for monitor microprocessor software version upgrade to the USB memory.
How to upgrade the software
> Unplug the AC cord.(make sure AC power shut down more than 1 minute.)
> Insert the USB memory for version upgrade (prepared as above) into the service socket located Right side from center at terminals, above HDMI4 terminal in the rear of the unit.
> Plug in the AC cord while the power button pressing. After 5 seconds, release the power button. [SERVICE MODE]
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 monitor microprocessor software is upgrade, should perform the "Industry Init " by all mean.
> After the upgrade start-up, the power light will flash continuous.
> A failure in the process will trigger the upgrade failure screen. 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 set will restart automatically.
> Unplug the AC cord and remove the USB Memory 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 and panel size information.
LCD TV ADJUSTMENT ITEM
MICON SOFTWARE Writing
Monitor Micon and Main Micon software writing (Main PWB : QPWBXE001WJN1)
Adjustment item > Software writing
Adjustment conditions > Inspection mode file version checking.
Adjustment procedure > Connect the tool by using write MAIN soft to P9301 (TL9301,TL9302,TL9310 - TL9355,TL9357, TL9359,TL9375,TL9378,TL9380 - TL9383) that is mounted on the main PWB, and insert USB Memory by using MONITOR MICON to main PWB.MONITOR connect to TL8123,TL8124 that denoted figure. Load stated voltage to MAIN PWB, write the latest version MAIN SOFT to IC8451, and write the MONITOR MICON SOFT to IC2002, after all completed, turn off the AC power.
­NOTE: When the USB MEMORY can't insert to main PWB or read out is error, MAIN Miro software must be write again.