The Red Led Flashes (Display Abnormality Is Set) - Sharp PN-L803C Service Manual

8. THE RED LED FLASHES (DISPLAY ABNORMALITY IS SET)

To locate the abnormal position, perform a certain
operation or use a certain RS232C command and LAN
command to display the diagnosis result.
No NG
Any defect with the 5V Power Supply PWB?
OK
Any problem with the LED Power Supply PWB?
No abnormality
Check the connection cable.
No abnormality
Check the Main PWB and the related parts for any
abnormality.
- Check the connection cable.
- Check the fuse (Main Power : F2200) or breakage.
- Check the PWB.
9. THE LED LIGHTS UP IN ORDER OF RED -> GREEN -> RED -> GREEN (DISPLAY
ABNORMALITY IS SET)
To locate the abnormal position, perform a certain
operation or use a certain RS232C command and LAN
command to display the diagnosis result.
No NG
Check the Key PWB and the related parts for any
abnormality.
- Check the connection cable.
- Check the PWB.
No abnormality
Check the Main PWB and the related parts for
any abnormality.
- Check the connection cable.
- Check the fuse (Main Power : F2200) or breakage.
- Check the PWB.
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
PN-L803C/80TC3 TROUBLESHOOTING 7 - 5
NG
Is there any abnormality in the NG position?
Check the power for abnormality.
- Check the fuses (5V Power : F2100,
12V Power : F2101, 13V Power : F2102,
AMP Power : F2300) for breakage.
- Check the cable connection.
Replace the 5V Power Supply PWB.
Replace the LED Power Supply PWB.
Replace the abnormal part.
Replace the abnormal part.
NG
Is there any abnormality in the NG position?
Is the unit properly installed?
Abnormality
Replace the abnormal part.
Replace the abnormal part.
Replace the abnormal part.