Question about Hitachi 42EDT41 42 in. HD-Ready Plasma Television

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Missing voltage? according to hitachi guide, y-sus board should have vsc,-vy and vsetup. I get -vy(75 dc) but vsc (12dc should be 200) and vsetup(40 dc should be 190dc). Can not adjust? All reading on the y-sus board

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Re: missing voltage?

Alot of voltage adjustments at that high voltage are likely from another source that develops it like the the swith-mode power supply upstream on power supply board that feeds it ..look for burnt resistors in this case.. I bet your in the wrong circuit but u can test all wires and pins coming in for 200 volts. get a schamatic of it and find a good tech if u dont know what i am saying. ty crazylarry

Posted on Jun 27, 2007

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Vy and vsc voltage are not stable what to do??

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Sep 29, 2016 | Flat Panel Televisions

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Standby light is light red when the power button is pressed. The power light turns blue and flashes 7 times on the seventh time stays solid blue. The panel doesn't light up or anything. I can hear the...

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

Jun 16, 2015 | Flat Panel Televisions

1 Answer

My 50" lg plasma has

first thing you you need to do is open the back cover for trouble shooting. then check the normal connection of all the connectors and then look for the back light if their is a maldischarge from the module.disconnect all the connectors to isolate excessive voltage. turn on the tv and check the Y board if normal the Va, Vs, -Vy and Vsc voltage are all present.the same thing with the Z board the Vzb, Vs and Va voltage if normal,check if no blown fuse.there are FET at control board check the 3.3v, 1.8v and careful always especially in performing voltage checking.

Apr 26, 2011 | LG Flat Panel Televisions

1 Answer

My hitachi P50H401 will not turn on. No sound no

check your sdr boards. you can test them with a multi meter. they are known for going bad. what happens is the two caps by the output go bad on the power supply and they make the sdr boards burn out. you can replace the two caps and save lots of money. then please check out this web page

This web page has info about repairing these. The 4 flashing lights maybe the x sus or the y sus but it's still a good idea to check the sdr boards since its a common failer. I had one tv with a bad sdr board flash 3 time and another set it was flashing 4 times.

Nov 16, 2009 | Hitachi P50H401 50 in. Plasma HDTV

2 Answers

I have a Hitachi tv and tonight the screen went blank but the voice remained on. does anyone know how I can fix it????

Usually it is the Y-sus that has the problem. This is one of the boards that sustain the picture on the screen.

For this particular issue, there could also be issues with the y-drives and Z-sus. The way to find out for sure is to take the voltages (Va, Vs, Vcc, etc) on the boards and matching them up with the specified values on the panel.

Oct 13, 2009 | Hitachi 42EDT41 42 in. HD-Ready Plasma...

2 Answers

Vizio p50hdm red flashing pixels

Try to adjust the Vs voltage on the power supply by lower it a little bit or increase it a little bit. It will help to decrease the red pixel flashing.

Apr 24, 2009 | V, Inc. Vizio P50HD Plasma Television

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Vizio P50HDM is dead

Measure the -Vy and Vsc on the Y Sus board. If there are no voltage reading then you have to replace both of them.

Hope this will help!

Feb 17, 2009 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

No picture

send an email with the schematic and I'll try to point you in the right direction.

Jun 28, 2007 | Hitachi 42EDT41 42 in. HD-Ready Plasma...

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