
4 Troubleshooting
4 Troubleshooting
Notes: 1. Before troubleshooting, setup the PC ’ s display as below.
•Resolution: 2560 x 1600
•
•
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, Inverter, Panel
•5V develop but no screen: Main PBA
•+24V, +18V does not develop: SMPS, Main PBA
4-1 No Power (SMPS)
Plug in the Power Cable
Stand by LED On?
Yes
No
No
Check related circuit with IC801S 1 Vcc and
3Aroind 20V at 2pin on
Yes
Check the Vcc Circuit from DS803
4Check DSW at ICM801S
Yes
Around 380V on CP803
Yes
Replace LCD Panel.
No
No
Change ICM801S and check the
related circuit
Check the related circuit whit ICP 801S
and QP801S
Check 24V output related circuit with
zener diode (DZM854)
Check IC 8008 DC/DC convertor for
5.4V output
Check ICM853(379Roo) for 18V output