SHUT-DOWN PROBLEMS
- Normally, when there is a power problem, shutdown occurs immediately. So, to resolve a power problem, voltage checks are necessary before shutdown.
- Check if the power comes up after disconnecting the suspected board. If power comes up after disconnecting a board, the board is defective. “Power comes up”equals “no shutdown”.
- After exchanging the following boards, voltage adjustment is required. P board, SC board, SS board.
TROUBLEHOOT FOR ONE TIME BLINK
- To confirm this, unplug the TV and disconnect connectors A5, A6, and A7 from the A board.
- The TV should turn on automatically and display a white screen.
Defective Board => A Board
To find the defective board:
The A board is defective.
LED BLINKS 2 TIMES
TH-50PX77U = SS33
TH-50PX77U = SS33
Trouble Mode => 5V down SOS
Defective Board (Possibility) => P, D, A, SC, SS Board (P > A, D, SC, SS)
TH-42PX75U = SS23
TH-42PX77U = SS23
TH-50PX75U = SS33
LED BLINKS 3 TIMES
Defective Board => D Board
Defective Board => D Board
Trouble Mode => .3V down SOS
LED BLINKS 4 TIMES
YES > Panel.
YES > Panel.
Trouble Mode è Power Supply SOS
Defective Board è Primarily P board or possible D board
Turn the unit on.
Is pin 12 of CN P25 of the P board high before shutdown?
NO > D Board.
YES > P Board
LED BLINKS 5 TIMES
Trouble Mode => 5V SOS
Defective Board => D, P, C, SC, SS board or Panel (DDIC)*1
Disconnect CN P12 of the power supply board. Measure the resistance of pin 1 of the lead cable to ground.
Is there a short to ground?
NO > Proceed to more extensive troubleshooting.
Warning: Disconnect AC Power prior to making any disconnection or connection.
Warning: Disconnect AC Power prior to making any disconnection or connection.
