3-1
FWD-50PX3
Section 3
Troubleshooting
3-1. Self Diagnosis Operation
Check Items
Status
Panel communication error
Power Off
→
LED Blinking two times
Temp. abnormal
Power On
→
LED Blinking three times
FAN abnormal
Power Off
→
LED Blinking four times
Voltage abnormal
*
Power Off
→
LED Blinking five times
*
: There is abnormal state in any of 5 V/9 V/3.3 V/Vs/Va/12V that is output from the G board.
Raster symptoms (If LED is ok)
1. No raster
(First check back raster if plasma display
panel is on)
Cause 1: If it is ok, replace the A board.
Cause 2: If it is not, replace the G board or plasma
display panel.
2. No raster at special mode.
Cause 1: Replace the A board.
Cause 2: If there is no raster after inputting the DVI
signal, check EDID.
3. Abnormal raster
Cause 1: When you change A board, it is abnormal.
→
Plasma display panel has problem.
Sound Symptoms
1. You can not hear sound output
Cause 1: Check pins 1 and 3 of the P600 on the A board.
If it is not, replace the A board.
2. Abnormal sound
Cause 1: Replace the A board.
3-2. Check Point
3-2-1. A Board
LED symptoms
1. No LED flashing
Cause 1: G board can not supply 5 V.
(Check pins 3 and 4 of the P701 on the A
board.)
→
Check the connector or replace the G board.
Cause 2: Pattern on the A or H1 board is short.
→
Replace the A or H1 board.
2. Only red LED lighting (No power on)
Cause 1: Check the 5 V line from the G board to the A
board.
(Check pin 1 of the P701 on the A board.)
→
If the 5 V line is abnormal, check the
connector, or replace the G board. If it is ok,
replace the A board.
Cause 2: Microcomputer halt
→
Replace the A board.
3. Only amber LED lighting (No power on)
Cause 1: Microcomputer halt
→
Replace the A board.
4. Repeated blinking from red to green LED
flashing (No power on)
Cause 1: A board is damaged.
→
Replace the A board.
Cause 2: G board can not supply another voltage.
→
Replace the G board.
5. Blinking red LED many times.
Refer to Section 3-1.
Summary of Contents for FWD-50PX3 - 50" Plasma Panel
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Page 135: ...Printed in Japan Sony Corporation 2007 9 22 2007 FWD 50PX3 SY E 9 968 367 01 ...