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2. LED blinking
3. Power board
Yes
Yes
Yes
Yes
POWER_LED is blinking red.
No 5VSTB(CN502#1).
PC0N (CN502#2) and +5V (CN502#3) are measured
simultaneously.
Before PCON is set to "L", +5V has not carried out
voltage drops.
Where CN502 is removed, 5VSTB (CN502#1) is not
outputted.
Check abnormalities of the connection circuit of +5V.
(Such as Q512,Q505)
Defect parts should be exchanged.
When there are no abnormalities in a POWER board,
MAIN PCB can be exchanged.
Abnormality of the board for MAIN, replace the MAIN
board
PC0N (CN502#2) and +12VA (CN502#9) are
measured simultaneously.
Before PCON is set to "L", +5V has not carried out
voltage drops.
There are no abnormalities in the connection circuit of
+5VSTB.
(Such as D509,U503,U502,U505,L550)
Check abnormalities of the connection circuit of +12V.
(Such as D511,Q510,Q509,Q508,Q507,ZD503)
Defect parts should be exchanged.
When there are no abnormalities in a POWER board,
MAIN PCB can be exchanged.
Abnormality of the board for MAIN, replace the MAIN
board
Abnormality of the board for MAIN, replace the MAIN
board.
Check abnormalities of the circuit of a primary side.
(Such as D501,D502,D503,D504,Ce501,Q501,U501)
Defect parts should be exchanged.
No
No
No
No
