Panasonic4

PANASONIC 42" PLASMA TV [REPAIR HINTS] [SERVICE EXPERIENCE]

Fault:

TV will turn ON.  Will turn OFF as soon as the picture appears.  Repeats the same, whenever switch ON.




     Checked all the voltages from
main power supply regulator board.  Set switched ON, after connecting
digital multimeter, set to voltage range [Auto range], between (+15)
Volt and ground. 




   Noted that, the (+15V) line drops
its voltage, when the set receive picture, goes very low, into
protection mode.  Checked all the related components.  Concentrated on
audio output stage circuit.  Disconnected the speakers by unplugging the
speaker wire from the socket.