Samsung LS17PEA Troubleshooting
4 Troubleshooting
4-1
4 Troubleshooting
4-1 No Power (17", 19")
When Pin 4 of CN600 is 0V
does proper DC 13V, 5V
appear at Pin 5 and 6, 7 of
CN600 separately?
Change IP Board.
Check Function Ass'y.
Yes
Yes
No
When Pin 1 of IC600 is DC 5V
does proper DC 3.3V appear at
Pin 3 of IC600?
Check IC600 and related circuit.
Yes
No
When Pin3 of IC602 is DC 3.3V
does proper DC1.8V appear at
Pin2 of IC602?
Check IC602 and related circuit.
No
* All locations of this page includes Main PBA.
Notes: 1. Before troubleshooting, setup the PC 's display as below.
• Resolution: 1024 x 768
• H-frequency: 61 kHz
• V-frequency: 75 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
• No raster appears: Function PBA, Main PBA, I/P PBA
• 5V develop but no screen: Main PBA
• 5V does not develop: I/P PBA
4. If you push and hold the " (Enter/Source)" button for more than 5 seconds, the monitor
automatically returns to the factory preset.
4 Troubleshooting
4-2
X400 oscillate properly?
4-2 No Video (ANALOG 17", 19")
1
Replace or check related circuit.
Check signal cable connection and
power.
Yes
No
Is there R, G, B input at
R101, R100 and R103?
Check input part.
Yes
No
Is there Hsync, Vsync waveform
at Pin 100, 1 of IC 400?
Check IC400 and related circuit.
No
2
3
Yes
Is there Hsync, Vsync waveform
at Pin 43, 44 of IC 200?
Check IC200 and related circuit.
No
Yes
Does the output signal appear
at Pin 17~20, 22~27 of CN400?
Check CN400 and related circuit.
No
Yes
There are DC 5V at Pin 1,
2 and 3 of CN400?
Check PANEL_EN SIGNAL at R222
is High(On:High) and BL_EN signal
at R603(ON:Low) is Low
No
Yes
Replace LCD Panel.
2
3
* All locations of this page includes Main PBA.
Loading...