Troubleshooting.pdf

(2288 KB) Pobierz
749099703 UNPDF
4. Troubleshooting
4. Troubleshooting
4-1. Troubleshooting
1.
Check the various cable connections irst.
• 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.
2.
3.
4-1
749099703.014.png
4. Troubleshooting
4-1-1. 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.
Major
checkpoints
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.
1
3
2
LAMP off, power indicator
LED red color?
Yes
No
Check a connection a power cable.
Diagnostics
1
Does proper DC 13V appear at
pin21,22 of CN801?
No
Change a Assy PCB Power.
Yes
2
Does proper DC A3.3V appear at
C1131_NACH, C1132_NACH?
No
Check a IC1103_NACH.
Change a main PCB ass’y
Yes
Does proper DC 5V, 3.3V,
1.25V(B1.2VD), 1.5V, 1.8V(MT_DDRV)
appear at C1140, C1169,
C1163, C1167, C1174?
No
Check a IC1108, IC1107, IC1109
Change a main PCB ass’y
3
Yes
A power is supplied to set?
No
Check a other function.
(No picture part)
Replace a lcd panel.
Caution
Make sure to disconnect the power before working on the IP board.
4-2
-
-
-
-
749099703.015.png 749099703.016.png 749099703.017.png 749099703.001.png 749099703.002.png
4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
-
-
-
Check the PC source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
2
1
Power Indicator is off.
Lamp on, no video.
Yes
Diagnostics
Check a PC source and check
the connection of DSUB cable?
No
Input a analog PC signal and
connected cable(DPMS).
Yes
1
Does the signal appear at C3131,
C3133, C3136(R,G,B)
No
PC cable. Change a PC
cable. Change a main PCB ass’y.
Yes
2
Does the digital data appear at the
output of LVDS (RA5104~RA5109)?
No
Check a IC5105
Change a main PCB ass’y
Yes
Check a LVDS cable?
Replace a lcd panel?
No
Please, Contact Tech support.
Caution
Make sure to disconnect the power before working on the IP board.
4-3
749099703.003.png 749099703.004.png 749099703.005.png 749099703.006.png 749099703.007.png
4. Troubleshooting
WAVEFORMS
1
R,G,B Output Signal
4-4
749099703.008.png 749099703.009.png 749099703.010.png 749099703.011.png
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
-
-
-
Check the HDMI source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
3
2
1
Power Indicator is off.
Lamp on, no video.
Yes
Diagnostics
1
Check the connection
of HDMI cable?
No
Input a HDMI cable.
Yes
2
Does the digital data appear at
Pin17,18,20,21,23,24 of IC3108?
No
Check a IC3108.
Change a main PCB ass’y.
Yes
3
Does the digital data appear at output
of LVDS (RA5104~RA5109)?
No
Check a IC5105.
Change a main PCB ass’y.
Yes
Check the LVDS cable?
Replace the LCD panel?
No
Please, Contact Tech support
Caution
Make sure to disconnect the power before working on the IP board.
4-5
749099703.012.png 749099703.013.png

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin