Hitachi 50 Plasma no picture has sound

[dbraffo]

Hello all. I'm a bit stumped on this one. I have a 50HDA39. It as a Sony PSU and LG everything else screen Y and X boards and Buffers. Here is what is happening.
Picture no, disconnect X and I get 1/2 of something see pic 1A
Sound yes
+ VA's are 60.4v
+ Vs's are 88.6v with X connected and 105.6 with X board disconnected
+ 5v's are 5.1.
with x connected, Y boards heat sinks are warm to the touch and x Board heat sinks are one warm one cold. testing around the cold voltages are bad. I am going to remove sink and inspect closer. with x board connect using the remote I get vertical bars only and they change when scrolling the input. In pic 1A the bars are there and to the right is the part of the picture that moves, this is one of the things that has me stumped. I did replace the 3 470mf250v caps on the PSU, only one was bad. Thanks in advance DAB

[ReeceyBurger123]

Re: Hitachi 50 Plasma no picture has sound

Ahh nice old plasma tv, you will firstly need to replace the blown caps on the psu as they wont be helping things however looks like the Zsus has failed more than likely its a failed ipm chip that mounted under the heatsinks. What soldering skills/equipment do you have ? I would suggest that you DO NOT buy a used Zsus but buying brand new ipms and soldering them into place as it will last a lot longer that way.

[tom66]

Re: Hitachi 50 Plasma no picture has sound

Z-sustain / X-main fault causing pink discharge
And Y-sustain or Y-buffer fault causing vertical lines
Probably not worth fixing tbh... quite old and likely to have "sparklies"

[dbraffo]

Re: Hitachi 50 Plasma no picture has sound

Thanks for the reply's. My soldering skills are good, have soldering stations, Oscilloscopes ect. will pull the chips today and buffer boards too and price it out. Might fix this one for fun if not to expensive. This TV is at my home in NC but I work in TX about 5 Miles from Coppell TV and travel back and forth. I'll report back in a few weeks with a update. again thanks for the quick reply's. DAB

[ReeceyBurger123]

Re: Hitachi 50 Plasma no picture has sound

Check the Y buffers however I dont think that they could be blown seen a Zsus issue cause very similar symptoms to the ones pictured.