Saturday, October 17, 2015

SAMSUNG UN55B7000 TROUBLE SHOOTING AND SERVICE MODE

SAMSUNG UN55B7000

TROUBLE SHOOTING AND SERVICE MODE 

Troubleshooting
1.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.
2.Check the power input to the Main Board.
3.Check the Power input to the FRC(Frame Rate Conversion) Board.
Check internal Pattern both of FRC and FBE3 if there is some picture noise.
FRC: Factory mode(MUTE - BUTTON 1 - BUTTON 8 - BUTTON 2 - Power on) -> FRCM -> TP After DDR Press right button of Remocon.
FBE3: Factory mode(MUTE - BUTTON 1 - BUTTON 8 - BUTTON 2 - Power on) -> FBE -> Patt Sel -> Press right button of Remocon.
Case1: FBE3 ok,FRC NG: change the FRC Board Case2: FBE3 NG: change the main Board.
Check the LED lamp for source button on front.
If this LED blank 100mS frequently then FRC board is defective(communication problem via Main board) in this case change the FRC 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.
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 SDP84(ARSENAL)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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 SDP84(ARSENAL)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected
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 SDP84(ARSENAL)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected
No Picture (Video_CVBS)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINTS
Check the Video Source
Check the SDP84(ARSENAL)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
No Sound
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINTS
Check the RF Source
Check the SDP83(CHELSEA)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Alignments and Adjustments
General Alignment Instruction
1.Usually, a color LCD-TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync.
2.Use the specified test equipment or its equivalent.
3.Correct impedance matching is essential.
4.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.
5.Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.
6.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.
7.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
MUTE > Number Key(1) > Number Key(8) > Number Key(2) > 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.