Hitachi C32WD2TN2 TV power on problem

[Adam]

I have a Hitachi C32WD2TN2 TV and it is has a problem at power on. I
can take 1 to 20 attempts to get going but it is slowly getting worse
It switches back to standby just as the screen starts to show sings o
life. Sometimes it will try to power up again, three or four second
after failing without the remote being activated. It looks like a powe
supply ramping but not making it then ramping again on its own (limite
knowledge on this front). Once it does power on, it sometimes fail
again but comes on easier the next time it is tried. Once it has bee
on for 5 or 6 minutes it is OK for hours. I found a circuit diagram o
the net, but it is very limited and has no PCB layout for component I
etc. Have tried for bad joints without any luck. Has anyone any ide
where to start or is there anyway of bypassing the standby circuit a
it is never used

 

[[email protected]]

I have a Hitachi C32WD2TN2 TV and it is has a problem at power on. It
can take 1 to 20 attempts to get going but it is slowly getting worse.
It switches back to standby just as the screen starts to show sings of
life. Sometimes it will try to power up again, three or four seconds
after failing without the remote being activated. It looks like a power
supply ramping but not making it then ramping again on its own (limited
knowledge on this front). Once it does power on, it sometimes fails
again but comes on easier the next time it is tried. Once it has been
on for 5 or 6 minutes it is OK for hours. I found a circuit diagram on
the net, but it is very limited and has no PCB layout for component ID
etc. Have tried for bad joints without any luck. Has anyone any idea
where to start or is there anyway of bypassing the standby circuit as
it is never used.

Adam

Could be a 'dried up' electrolytic capacitor.
You can locate these by using a hairdrier on the suspect ones. When
these faulty caps are warm they will work ok for a little while. Just
long enough to determine which one.
Look for electrolytics near to heat sources. These dry them up over
time.

Also try this link, it's a database of many thousand of repair tips and
inherrent faults for CTV.
Im sure you'll find the fault here.

http://www.hamradio-badarc.co.uk/fault_database.htm

Steve Balstone
Stephen Balstone