Troubleshooting - Samsung 510N Service Manual

5 Troubleshooting
Notes: 1. Before troubleshooting, setup the PC's display as below.
© Resolution: 1024 x 768
© H-frequency: 61 kHz
e \-frequency: 75 Hz
2. lf no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
¢ No raster appears: Function PBA, Main PBA, |/D PBA
¢ 5V develop but no screen: Main PBA
¢ 5V does not develop: |/D PBA
4. If you push and hold the "[a\Enter, Source)" button for more than 5 seconds, the monitor automatically returns
to the factory preset.
5-1-1 No Power (MJ15A*/MJ15B*)
Check Function Ass'y.
Yes
Change IP Board.
When Pin 4 of CN600 is OV
does proper DC 13V, 5V
appear at Pin 1, 2 and 6, 7 of
CN600 separately?
When Pin 3 of IC602 is DC 5V
does proper DC 3.3V appear at
Check |C602 and related circuit. |
Pin 4 of IC602?
Yes
does proper DC 3.3V appear at Check IC600 and related circuit.
When Pin 4 of IC600 is DC 5V 5 |
Pin 5 and 6 of IC600?
'
Yes
When Pin 2, 3 of IC601 is No
DC 3.3V does proper DC 4.3V Check IC601 and related circuit. |
appear at Pin 1 of IC601?
ar
Yes
DC 4.3V does proper DC 2.5V Check IC601 and related circuit.
When Pin 2, 3 of IC601 is 0 |
appear at Pin 4 of IC601?
Y
* QV means power on state.
When the monitor work well except DPMS and power switch off,
OV should be applied to number 4 of CN600.
MJ15AS*/MJ17AS*/MJ19AS*/ of
MJ15BS*/MJ17BS*/MJ19BS*