Monday, May 20, 2013

PANASONIC TH-42PX75U - H-50PX75U - TH-42PX77U - TH-50PX77U - PLASMA TV - TROUBLEHOOT - LED BLINKS 1,2,3,4 &5 TIMES


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.
LED BLINKING TIMING [Click on table to Magnify]
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.
Trouble Mode => Communication Error
Defective Board => A Board
To find the defective board:
The A board is defective.
LED BLINKS 2 TIMES
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
Trouble Mode => .3V down SOS
LED BLINKS 4 TIMES
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.