Panasonic TH-103PF9UK - Power LED Blinks 2 Times (SC Side)

15V line SOS P(Multi/SS), D, DN,SS,PB,DR1/2 Board
Trouble Mode Defective Board
Panel SOS – Power LED Blinks 2 Times (SC Side)
How to find the defective board
Power Supply / Protect Circuit
Note: The check point is the socket on the board ,
not the cable's connector.
No
Yes
Yes
Is pin 1 of
socket P23 shorted to
GND?
DS Board
Yes
Disconnect the unit
from AC Power.
Is pin 1 of
socket SC23 shorted to
GND?
Is pin 1 of
socket DS4 shorted
to GND?
P(SC)
Board
SC Side Troubleshooting
No
Is pin 6 of
socket DR1 shorted
to GND?
DR1 Board
Yes
No
Disconnect
CN DR11. Is pin 6 of
socket DR11
shorted to
GND?
DR2 Board
Yes
No
SC2 Board
26
Disconnect CN P23,
P5, and P12.
Disconnect CN SC23 and SC80.
Disconnect CN DS4
Disconnect CN DR1
SC Board
Yes
No