There is no picture but
It sounds to me as you have a defect Y sustain or Z sustain board.
In general it is alway the same steps no matter the defect or even the make of the plasma.
will need to remove the back cover to troubleshoot the plasma you will
also need a digital multimeter. I will bet you have a defective power
suplpy but you have to be sure you don't want to through your money away
by shotgunning the set with boards.
First look for
missing voltages at power on each connector (not just Vs and Ve look at
all the voltages they are marked on label near the top of the panel)
should be labeled with the proper voltage. If you have one start with
the missing voltage and troubleshoot back, it is hard to say what the
ultimate failed components would be but you should be able to track it
to one board.
Rule 1 is troubleshooting is "start with your sense"
4. Touch (not recommend)
these are the best give way, if it looks damaged it is if it smells burn it is, if it sounds wrong it is
1. Look - examine each component on the board look for something burnt, swollen or distorted, and look at the fuses.
2. Smell - Smell around the set see if you can smell a burning smell on any of the boards .
3. Listen- Listen for a buzz or an arc out of one of the board, it may be normal but unlikely if you have a defect.
4. Touch- Important because if the parts are getting hot then they are running, but if they stay cold they are not.
for touch not the best idea on a power supply there is a high risk of
shock, as some of the heat sink may not share ground and possible have a
potential to earth ground between 5-500 volts.
need a DMM to check the diodes and the transistor non should read a
short, if any do you will need to remove it and check it out of circuit
if the component is not shorted but the short is still in circuit use
the schematic to follow the leads to where else the short could be
coming from and repeat.
I would have to say unless you
are familiar with repairing with a schematic it can be complex. Your
best bet is to do what best buy techs do.... Replace The Board. It is
the fastest sure fire way to fix it.
Next remove the
connector connecting to Y sustain and the Z sustain to the power supply
and attempt to power the set on if the set powers with the connectors
disconnected you have more than likely identified the issue as a failed
sustain board now to go further.
THIS IS NOT YOUR SET BUT A GOOD EXAMPLE, I Do not have any picture of
the interior of this model yet as it is not list on the hitachi service
site yet, i made a request for it but yet to be posted.
reconnect the power connect to the y sustain and see if the set powers
remember you will not get a picture but the lights on the front should
If the y main connected causes the set to act
up remove the buffer boards and attempt again, if the y still causes the
issue you have a failed y board. If disconnecting the buffer resolved
the issue you have failed buffers and possible a failed panel, try
replacing the buffers.
If the Y board connected the set
still light normal disconnect the board and connect the z sustain and
test the same as the y, if that causes the issue replace the z, If both
board disconnected cause still no power replace power supply.
my personal experience I would at least have the set professional
examined most good shops charge less then $50 mine only charges $25 so
it would be worth at least getting an estimate.
Let me know,if needed further assistance.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!
on Nov 25, 2010