Chapter 7. Troubleshooting; The Power Is Not Supplied (The Led Does Not Light Up) - Sharp PN-L803C Service Manual

CHAPTER 7. TROUBLESHOOTING

No

THE POWER IS NOT SUPPLIED (THE LED DOES NOT LIGHT UP)

1
THE REMOTE CONTROL DOES NOT WORK
2
THE DISPLAY DOES NOT WORK/ DISPLAY ABNORMALITY
3
THE BACKLIGHT DOES NOT LIGHT UP
4
SOUND IS NOT OUTPUTED/ OUTPUT SOUND ABNORMALITY
5
DISPLAYPORT(DP) OUTPUT IS NOT MADE / DISPLAY ABNORMALITY
6
CAN NOT CONTROL LAN CONNECTION (LAN FOR DISPLAY)
7
THE RED LED FLASHES (DISPLAY ABNORMALITY IS SET)
8
THE LED LIGHTS UP IN ORDER OF RED 3 GREEN (TEMPERATURE ERROR)
9
TOUCH PANEL ABNORMALITY
10
TOUCH PEN ABNORMALITY
11
1. THE POWER IS NOT SUPPLIED (THE LED DOES NOT LIGHT UP)
Is the AC cord properly inserted?
No abnormality
Is the power SW turned ON?
Is the power SW free from any abnormality?
No abnormality
Is the fuse of AC Relay PWB (F1, F2) blown?
No abnormality
Is BU_5V outputted from the 5V Power Supply PWB?
No abnormality
Are the powers 12V and 13V outputted from the LED
Power Supply PWB?
(CAUTION)
- If the signal input is not supplied, the power save
function is operated to interrupt the output of
12V/13V.
Yes
Check the Main PWB and the related parts for any
abnormality.
- Check the power cable.
- Check the fuses. (Main Power : F2200,
AMP Power : F2300, CTL Power : F2302)
- Check the MAIN I/F PWB.
No abnormality
Check the Key PWB and the related parts for any
abnormality.
- Check the Connection cable.
- Any problem with the Key PWB?
Description
TOUCH PEN CANNOT BE OPERATED / RECOGNIZED
TOUCH PEN IS NOT FUNCTIONAL / RECOGNIZED
THICKNESS OF BRUSH LINE CAN'T BE CHANGED
PERFORM SENSOR CHECK
No
Abnormality
Abnormality
No
No
Abnormality
Abnormality
PN-L803C/80TC3 TROUBLESHOOTING 7 - 1
Insert the AC cord properly.
Replace the abnormal part.
Replace the defective part.
Check the PWB and the related parts listed
below for any abnormality:
- Fuse (5V Power : F2100) (Is this blown out?)
- 5V Power Supply PWB
- Switch cable
- AC cord
Yes
Replace the abnormal part.
Check the PWB and the related parts listed
below for any abnormality:
- Fuses (12V Power : F2101,
13V Power : F2102) (Are they blown out?)
- LED Power Supply PWB
- Switch cable
- AC cord
Yes
Replace the abnormal part.
Replace the abnormal part.
Replace the abnormal part.