plug it in and it goes from red standby to blue on and nothing?? I attached picture , where do I start?
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Re: hitachi p50s601 no clue where to begin>?
start by reading.. https://www.badcaps.net/forum/showthread.php?t=25810
and all stickys:: https://www.badcaps.net/forum/forumdisplay.php?f=31
itll give u a good idea of what u will be getting into..Last edited by bodaciuos; 04-06-2014, 06:39 PM.Comment
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Re: hitachi p50s601 no clue where to begin>?
This model has a common from with shorted buffers and two large caps on the PSU. However looking on your photo it seems the two 3300uf caps have already been replaced before.
Start by disconnecting one buffer board at a time and then test if the panel would turn on and you should get half a picture (ie: if you disconnect the top one, only the bottom picture will show and vice versa). However I wouldn't leave it on long like that, I've seen the good buffer go bad if left on too long.Attached FilesLast edited by Glitcher; 04-06-2014, 07:42 PM.Comment
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Re: hitachi p50s601 no clue where to begin>?
Thank you. You just helped me learn something I never knew before. People like you help me out a lot... I have been repairing tvs for 5 months now on my own. Didn't know anything and I plan to open a tv repair shop. And I'm learning as I go. Hopefully a yr from now. Ill be ready. I can fix a lcd no problem. But man I'm scared of plasmasComment
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Re: hitachi p50s601 no clue where to begin>?
so now I disconnected buffers one at a time and nothing, the tv used to go from stand by to on and fans kick on for a sec and click off, now it wont even goto on, just stays in standbyComment
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This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today.... -
Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated. -
Hello fellow tech geeks!
I've recently come into possession (a freebie!) of a Hitachi 42HXT12U LED TV which does not work.
It does the following:
- Plug in
- Standby LED flashes alternating RED and BLUE approx 6-7 times
- Does this approx twice
- Standby LED stays solid BLUE
I've opened it up and had a look at the PSU board (which is a 17IPS20 23145828) for any bulging caps and there aren't any.
Any ideas folks? If you suggest replacing the PSU board then I'll go ahead and do it - only about 30 quid off... -
Hi all.
I started a thread while back regarding TV power supply standby circuitry as it is something I am not quite on top of.
SMPS theory and function is becoming more familiar, however the standby part is still a bit of a mystery.
Anyway, a friend has this TV with the above mentioned power supply board which has no standby voltage, nor any other voltages leaving the board.
The mains AC comes in fine, gets filtered and rectified with power is on the main filter cap as well as the transformer and drain pins of the ICE3B0665J, but that's it.
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Hello forum. I've recently been given a Yamaha TSX 120 DAB radio and ipod dock. Its working well however when put on standby its using 6.3 watts. The manual states less than 1 watt on standby. I measured this with a plug in monitor which seems accurate with other items. In use it uses around 7.5 watts. Firstly has anyone who owns a similar radio also got a plug in monitor to check if this is normal with this unit? In the first half a second the monitor shows 0.3 watts which I suspect is what it should use but something is switching it to be almost fully powered. I've searched the manual for eco...03-01-2024, 07:25 AM
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