Troubleshooting.pdf

(27016 KB) Pobierz

4. Troubleshooting

4. Troubleshooting

4-1. Troubleshooting

4-1-1. Previous check

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.

2.

4-1

749099310.057.png

749099310.068.png

4. Troubleshooting

4-1-2. No Power

-

-

-

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.

Symptom

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.

-

-

-

-

Major

checkpoints

Lamp(Backlight) Off,

power indicator LED on?

Yes

No

Change the 30P power cable

or IP board

Does proper Stand-By DC

A5V_PW appear at TP2004?

No

Yes

Does proper Main B12VS_PW,

B13V_PW, B5V_PW appear at

TP2007~8, TP2020~2, TP2013~6?

No

Diagnostics

Change the Main Assy

Yes

No

Does proper A3.3V_PW

appear at R2028?

Yes

Does proper B3.3V_PW, B1.9V_PW,

B1.25V_PW appear at

C2607, C2590, C2105?

No

Yes

Does proper PANEL_VCC_PW

appear at LVDS connector Pin #1~5

of T-con b’d?

No

Change the LVDS cable

Yes

No

Change the T-con b’d

Does proper DC B12V

appear at F1 of T-con b’d?

Yes

Check a other function

(No picture part)

Replace a LCD Panel

No

A power is supplied to set?

Make sure to disconnect the power before working on the IP board.

Caution

4-2

749099310.088.png

749099310.001.png

749099310.009.png

749099310.010.png

749099310.011.png

749099310.012.png

749099310.013.png

749099310.014.png

749099310.015.png

749099310.016.png

749099310.017.png

749099310.018.png

749099310.019.png

749099310.020.png

749099310.021.png

749099310.022.png

749099310.023.png

749099310.024.png

749099310.025.png

749099310.026.png

749099310.027.png

749099310.028.png

749099310.029.png

749099310.030.png

749099310.031.png

749099310.032.png

749099310.033.png

749099310.034.png

749099310.035.png

749099310.036.png

749099310.037.png

749099310.038.png

749099310.039.png

749099310.040.png

4. Troubleshooting

B5V_PW

GND

GND

GND

GND

B12VS

B12VS

GND

GND

GND

GND

B5V

B5V

B5V

B5V

GND

GND

GND

B13V B13V

B13V

ANA_DIM_OUT NC

SW_INVERTER PWM_DIM_OUT

NC

NC

NC

SW_POWER

LAMP_DETECT

MAINBOARD(B)

B3.3V_PW

B1.2V_PW

A1.9V_PW

PANEL_PW

A3.3V_PW

MAINBOARD(T)

Pin #1~5

F1

T-CON

4-3

749099310.041.png

749099310.042.png

749099310.043.png

749099310.044.png

749099310.045.png

749099310.046.png

749099310.047.png

749099310.048.png

749099310.049.png

749099310.050.png

749099310.051.png

749099310.052.png

749099310.053.png

749099310.054.png

749099310.055.png

749099310.056.png

749099310.058.png

749099310.059.png

749099310.060.png

749099310.061.png

749099310.062.png

749099310.063.png

749099310.064.png

749099310.065.png

749099310.066.png

749099310.067.png

749099310.069.png

749099310.070.png

749099310.071.png

749099310.072.png

749099310.073.png

4. Troubleshooting

4-1-3. No Video (Analog PC signal)

Symptom

-

Audio is normal but no picture is displayed on the screen.

-

-

-

Check the PC source

Check the Arsenal, Check the Chelsea.

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Major

checkpoints

Check a set

in the ‘Stand-by mode’ or

‘DPMS mode’

No

Power indicator LED is off.

Lamp(Backlight) on, no video

Yes

Input the analog

PC signal properly.

No

Check the PC source and

check the connection of D-SUB

Diagnostics

Yes

Does the signal appear at TP5002,

5003, 5004, 5006, 5008?

Check CN5001, PC cable.

Change the Main Assy

No

1

Yes

Does the digital data appear at

Pin #19,20,34,35 (LVDS Data clk)

of LVDS connector?

No

Check IC4010 (Saturn4)

Change the Main Assy

2

Yes

Check the LVDS cable?

Check the T-Con B’d?

Replace the LCD panel?

No

Please, Contact Tech support.

Caution

Make sure to disconnect the power before working on the IP board.

4-4

749099310.074.png

749099310.075.png

749099310.076.png

749099310.077.png

749099310.078.png

749099310.079.png

749099310.080.png

749099310.081.png

749099310.082.png

749099310.083.png

749099310.084.png

749099310.085.png

749099310.086.png

749099310.087.png

749099310.089.png

749099310.090.png

749099310.091.png

749099310.092.png

749099310.093.png

749099310.094.png

749099310.095.png

749099310.096.png

749099310.097.png

749099310.098.png

749099310.002.png

749099310.003.png

4. Troubleshooting

LVDS

P C RGB

HV sy nc

MAINBOARD(B)

4-5

749099310.004.png

749099310.005.png

749099310.006.png

749099310.007.png

749099310.008.png

Plik z chomika:

Inne pliki z tego folderu:

Cover.pdf (1331 KB)
Disassembly & Reassembly.pdf (11468 KB)
Exploded View & Part List.pdf (2519 KB)
Firmware Matrix 2009 (LCD 5 Series).xls (8515 KB)
Precaution.pdf (546 KB)

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin