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!

©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

SAMSUNG T23A750 T27A750 TFT-LCD MONITOR SERVICE MODE – SOFTWARE UPGRADE

SAMSUNG T23A750 T27A750 TFT-LCD MONITOR SERVICE MODE – SOFTWARE UPGRADE

Service Mode – USB software upgrade – Main software upgrade – Color calibration – SAMSUNG TFT-LCD MONITOR Connector Voltages & connecting cables details
[US/Canada]:  System: NTSC 3.58, ATSC, Sound: M
[EU/CIS/Australia/New Zealand/Singapore]:  System: PAL, SECAM, NT 443, ATSC Sound: BG/DK/I/L/L’
[Brasil]: System: PAL, NTSC 3.58, ATSC  Sound: M/N
HOW TO DISCONNECT THE Double Locked LVDS CABLE
Flip up the locking tab on top of the connector.
Squeeze the edge of the connector to release the second tab lock and gently pull the connector away.
LVDS connection faults
When the monitor is turned on, only a full black screen is displayed continually regardless of the signals. This fault occurs due to a fault or incorrect connections of the LVDS cable. Replace or reconnect the LVDS cable correctly.
HOW TO ENTER THE SERVICE MODE
[Power Off > MUTE > 1 > 8 > 2 > Power On]
Key Functions
Channel ∧∨, ▲ ▼ Key : Select an option.
Volume ＋－◄ / ► Key : Increase or decrease the value for an option.
Menu key: Save the current settings to EEPROM [Electrically Erasable Programmable Read Only Memory]  and return to the previous mode.
Number (0~9) keys: Change the channel.
TV/AV key: Switch to AV mode.
Initial display in service mode Mode : DTV , RES : NOTSUPPORT
Button functions in service mode
Menu  Full Menu Display/Move to Parent Menu
Direction Keys ▲/▼  Item selection by Moving the Cursor
Direction Keys ◄/►  Data Increase / Decrease for Selected Item
Source  Cycles through the active input source that are connected to the unit.
Sub-Page of Service
COLOR CALIBRATION METHOD - PC
Apply the VESA XGA Lattice (N0. 21) pattern signal to the PC IN port
Press the Source key to switch to “PC” mode
Enter Service mode
Select the “Calibration” menu
Select the “PC Calibration” menu.
In “PC Calibration Off” status, press the  ► key to perform Calibration.
When Calibration is complete, it returns to the high-level menu.
You can see the change of the “PC Calibration” status from Failure to Success.
FIRMWARE UPGRADE - USB
Samsung may offer upgrades for Monitor’s firmware in the future.  Upgrades will be possible by connecting a USB drive to the USB port located on your Monitor.
Insert a USB drive containing the firmware upgrade into the USB port on the rear of the Monitor.
Press the MENU button to display the menu. Press the ▲ or ▼ button to select "Support", then press the ENTER button.
Press the ▲ or ▼ button to select "Software Upgrade", then press the ENTER button to select "By USB". The message "Scanning for USB. It may take up to 1 minute." is displayed.
The message "Upgrade version XXXX to version XXXX?  The system will be reset after upgrade." is displayed.  Press the ◄ or ► to select the "OK", then press the ENTER button.
Be careful to not disconnect the power or remove the USB drive while upgrades are being applied. The Monitor will turn off and turn on automatically after completing the firmware upgrade.  Please check the firmware version after the upgrades are complete. When software is upgraded, video and audio settings you have made will return to their default (factory) settings.  We recommend you write down your settings so that you can easily reset them after the upgrade.mware upgrade.
PROGRAM UPGRADE - MAIN
If you select MENU  Support  Software Upgrade on remote control, you’ll see below picture.
Press ENTER, then you’ll see below picture. Select Yes
FigMicom program is now upgrading as below picture.
After Software Upgrade is process by 100%, the monitor is automatically turn off and on.
Enter the Factory Mode and select the “SVC” menu.
Select the “MICOM UPGRADE” menu.
Press the “ ►” button on the remocon and wait the completion of upgrade. The system will be reset after upgrade.
[WARNING] Don’t turn off the monitor until the upgrade is completed.
CONNECTOR Voltages & connecting cables DETAILS
General Troubleshooting
When turning on the Power button after connecting the power, the LED at the front of the monitor does not operate.
> Check the IP board power fuse and the IP board output power.
> Check the connections for the IP board and the Main board inside the monitor.
> Check the LED of Power & IR function board and connections between the function assy and main board.
> Check the Main board power part and check also whether there is any abnormal output at other output terminals.
Though the LED power turns on, the screen is blank when connecting the VGA cable.
> Check the D-sub cable connections.
> Check whether the LVDS cable is connected correctly to the panel.
> Check whether the lamp connector of the panel is connected correctly to the IP board.
> Check the circuit related PC input and scaler operation.
The LED power turns on but the screen is blank when the DVI cable is connected.
> Check the DVI cable connections.
> Check whether the LVDS cable is connected correctly to the panel.
> Check whether the lamp connector of the panel is connected correctly to the IP board.
> Check the circuit related DVI input and scaler operation.
DVI signals are not recognized.
This fault occurs when the PC does not recognize the mode information because the DVI DDC has not been input to the monitor.  Input the DVI DDC to the monitor.
When the monitor is turned on, only a full white pattern is displayed continually regardless of the signals.
This fault occurs when only the lamp power is supplied and no video signals are input to the panel due to a fault or incorrect connections of the LVDS cable.  Replace or reconnect the LVDS cable correctly so that video signals can be supplied to the panel.  [A full white pattern is a feature of the TN panel and is displayed when no video signals are supplied.]
Posted By: FRANK at 05:12
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