Electronics Repair Questions? Ask an Electronics Technician
Thank you for allowing me to assist you, my name is Joe and I will be happy to assist you with your concern today.
What is the model number of the tv itself?
Here is a link to download the service manual which contains the info on the pcb: http://www.manuals-in-pdf.com/download-42HDT50-HITACHI-p-117407.html
Thank you!- Joe
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If you need any further assistance you can reply back at any time for my help.I'd be happy to answer any other questions you have even if not related.
It seems like there are a common failure among these boards, is this the same problem you are experiencing as they make a simplified repair kit for it.
No problem, I'm going to open this up to other experts.
Hi , i`m Jack and i can help you with this
I have the complete service manual which includes that schematic .
Let me know when you are ready to receive it as i wont leave it long online so i will give it to you once you reply
Never mind that , its another version of power board
I`m opting out as well
This time i do have the schematic for the MPF7409L but i will wait for your reply
O.k then give me a few , was expecting you yesterday so i have this stashed away
I`ll start b saying that normally the 42HDT50 model you listed uses the MPF7404L not the MPF7409L , not sure what happened in your case but that is what made it difficult to find and figure.
The MPF7409L is normally used in the models
You can see that at the link here , look at the lower right of the page ; http://www.shopjimmy.com/hitachi-ha01262-power-supply-unit.htm
Now I got the service manual for the models
They all use that power board , look on page 59 for a full schematic then near then end of the manual there is plenty of info`s and troubleshooting guide for that board.
click the link below and if that link opens a login window popup then just close it with the upper corner X or the "no thanks . continue to view"The manual is behind that and one opened use the DOWNLOAD button on that page to retrieve it to your PC
If that does it for you then please do not forget to rate by clicking on the star icons at the top, then click on Submit so i get paid for my time helping you .Also note that it will not close this post , you can come back here at any time if you have questions.
In any case if you have the manual for the hdt50 then you also have the other boards and this one is definitely the 7409
You asked for the manual and i delivered now the meter is in your hands
That attachment won`t open and the manual you have is what comes from the company .
If you can figured the voltages by following the voltage s indicated at the connectors in reverse then all the better , i mean this is not a video circuit you`re working on here its plain power switching and regulation .
I`ll take a look for that part list but the schematics won`t change
That schematic is plenty enough for a tech. to work with , it is easy to figure out what should be at such and such lines if you only look at the output connectors where it is indicates which voltages .
That schematic is a map with part locations number indicated , not sure what more you want but i`m opting out now , spent enough time on this
No parts list either but if i go back to the top of the page you said quote " Only a schematic diagram to the power supply will suffice "