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 !

Friday, 8 March 2019

SAMSUNG LE32A556 - LE37A556 - LE40A556 - LE46A556 - LE52A556 SERVICE MODE AND TROUBLE SHOOTING

SAMSUNG LE32A556 - LE37A556 - LE40A556 - LE46A556 - LE52A556 SERVICE MODE AND TROUBLE SHOOTING

SAMSUNG LE32A556 - LE37A556 - LE40A556 - LE46A556 - LE52A556 

SERVICE MODE AND TROUBLE SHOOTING 

Troubleshooting
Check the various cable connections first.
# Check to see if there is a burnt or damaged cable.
# Check to see if there is a disconnected or loose cable connection.
# Check to see if the cables are connected according to the connection diagram.
Check the power input to the Main Board.
Check the Power input to the FRC(Frame Rate Conversion) Board.
Check internal pattern of FBE3 if there is some picture noise.
FBE3: Factory mode(Info - Menu - Mute - Power on) > 4. Advanced Menu > Option Block > FBE3  > Patt-Sel >  Press right button of Remocon. FBE3 NG: change the main board.
No Power
SYMPTOM
The LEDs on the front panel do not work when connecting the power cord.
The SMPS relay does not work when connecting the power cord.
The units appears to be dead.
CHECK POINTS
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
Check the fuses of each part.
Check the output voltage of SMPS.
Replace the Main Board.
Does proper DC 13V appear at pin21,22 of CN801? >  Change a Assy PCB Power.
Does proper DC A3.3V appear at C1131_NACH, C1132_NACH? > Check a IC1103_NACH. Change a main PCB ass’y
Does proper DC 5V, 3.3V, 1.25V(B1.2VD), 1.5V, 1.8V(MT_DDRV) appear at C1140, C1169, C1163, C1167, C1174? > Check a IC1108, IC1107, IC1109 Change a main PCB ass’y
No Video (Analog PC signal)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINTS
Check the PC source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Does the signal appear at C3131, C3133, C3136(R,G,B) > PC cable. Change a PC cable. Change a main PCB ass’y.
Does the digital data appear at the output of LVDS (RA5104~RA5109)? > Check a IC5105 Change a main PCB ass’y
No Video (HDMI - Digital Signal
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINTS
Check the HDMI source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Does the digital data appear at Pin17,18,20,21,23,24 of IC3108? > Check a IC3108. Change a main PCB ass’y.
Does the digital data appear at output of LVDS (RA5104~RA5109)? > Check a IC5105. Change a main PCB ass’y.
No Video (Tuner_CVBS)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
 CHECK POINTS
Check the Tuner CVBS source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Does the signal appear at C1351? > Check a B+ voltage (#3 of Tuner) 5V, change a main PCB ass’y.
Does the signal appear at pin 9 of TU3101? > Check a TU3101 Change a main PCB ass’y.
Does the digital data appear at the output of LVDS (RA5104~RA5109)? > Check a IC5105 Change a main PCB ass’y
No Picture (S-VIDEO_Y,C)
SYMPTOM
Audio is normal but no picture is displayed on the screen
CHECK POINTS
Check the S-Video_Y,C source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Does the Y/C signal appear at C5104, C5105 of IC5105? > Check a connection harness.
Does the digital data appear at the output of LVDS (RA5104~RA5109)? > Check a IC5105 Change a main PCB ass’y
No Sound
CHECK POINTS
Check the RF Source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Does the signal appear at pin #6, #4, #5, #12(MCLK, BCLK, LRCLK, DATA) of IC2102? > Check a connection harness and headphone jack./Side AV Check Sound Processor IC2102 (MT8291)
Check the DC 12V BD2107 of IC2104? > Check a B12V Line. Change a main PCB ass’y.
Does the signal appear at Pin #47 or 48, #53 or 54(CH1_L, R Sound) And Pin #36 or 37, #30 or 31 (CH2_L, R Sound) of IC2104? > Check a B12V Line. Change a main PCB ass’y
Does the signal appear at Pin #47 or 48, #53 or 54(CH1_L, R Sound) And Pin #36 or 37, #30 or 31 (CH2_L, R Sound) of IC2104? >
Alignments and Adjustments
General Alignment Instuction
Usually, a color LCD-TV needs only slight touch-up adjustment upon installation.
Check the basic characteristics such as height, horizontal and vertical sync.
Use the specified test equipment or its equivalent.
Correct impedance matching is essential.
Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV. When inserting signal markers, do not allow the marker generator to distort test result.
Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.
Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.
To protect against shock hazard, use an isolation transformer.
Factory Mode Adjustments
Entering Factory Mode
To enter ‘Service Mode’ Press the remote -control keys in this sequence :
- If you do not have Factory remote - control
INFO > MENU > MUTE > Power on
- If you have Factory remote - control
PICTURE ON DISPLAY FACTORY
- The buttons are active in the service mode.
1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left Arrow Right, Menu, Enter, Number Key(0~9)
2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -, Menu, TV/VIDEO(Enter)
Panel Check
You have to check Panel Maker Because of different adjustments as follows.
First of all, Check the label rating!
1) Label Rating File
- LCD PANEL MARK
A:ACER(AUO),S : SEC,C : CMO
* If not printed you could consider S(sec) panel mark.
Method of Color Calibration (AV)
1) Apply the NTSC Lattice (N0. 3) pattern signal to the AV IN 1 port
2) Press the Source key to switch to “AV1” mode
3) Enter Service mode
4) Select the “Calibration” menu
5) Select the “AV Calibration” menu.
6) In “AV Calibration Off” status, press the “> ” key to perform Calibration.
7) When Calibration is complete, it returns to the high-level menu.
8) You can see the change of the “AV Calibration” status from Failure to Success.
Method of Color Calibration (Component)
1) Apply the 720p Lattice (N0. 6) pattern signal to the Component IN 1 port
2) Press the Source key to switch to “Component1” mode
3) Enter Service mode
4) Select the “Calibration” menu
5) Select the “DTV Calibration” menu.
6) In “DTV (Component) Calibration Off” status, press the “>” key to perform Calibration.
7) When Calibration is complete, it returns to the high-level menu.
8) You can see the change of the “Comp Calibration” status from Failure to Success.
Method of Color Calibration (PC)
1) Apply the VESA XGA Lattice (N0. 21) pattern signal to the PC IN port
2) Press the Source key to switch to “PC” mode
3) Enter Service mode
4) Select the “Calibration” menu
5) Select the “PC Calibration” menu.
6) In “PC Calibration Off” status, press the “ >” key to perform Calibration.
7) When Calibration is complete, it returns to the high-level menu.
8) You can see the change of the “PC Calibration” status from Failure to Success.
Method of Color Calibration (HDMI)
1) Apply the 720p Lattice (N0. 6) pattern signal to the HDMI1/DVI IN port
2) Press the Source key to switch to “HDMI1” mode
3) Enter Service mode
4) Select the “Calibration” menu
5) Select the “HDMI Calibration” menu.
6) In “HDMI Calibration Off” status, press the “>” key to perform Calibration.
7) When Calibration is complete, it returns to the high-level menu.
8) You can see the change of the “HDMI Calibration” status from Failure to Success.
USB Download Method
Samsung may offer upgrades for TV’s firmware in the future. Please contact the Samsung to receive information about downloading upgrades and using a USB drive. Upgrades will be possible by connecting a USB drive to the USB port located on located on the back of your TV. Insert a USB drive containing the firmware upgrade into the wiselink port on the side of the TV. (USB drive make folder “MT8226” and this folder download micom program.)
2. To enter factory mode.
Option Table -> Control -> USB then press the ENTER button.
The message USB Searching…
It may take up to 30 seconds is displayed.
Please be careful to not disconnect the power or remove the
USB drive while upgrade is being applied.
The message “Do you want upgrade?”
Press the left, right button to select “Yes”.
The TV will shut off after completing the firmware upgrade.
Please check the firmware version after the upgrade is complete.}
* How to check Program Version
1. To enter Factory mode
2. Check the main micom version of “3.Information”.
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Posted By: FRANK at 02:07
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