Double checking my diagnosis for Hitachi P50s601.

4047 Views 7 Replies 4 Participants Last post by Plasmajunkie, Jul 25, 2013

chaz

Discussion Starter · Aug 10, 2012

Hi all,

Thanks to your forum I've been able to somewhat deduce my issues, but I wanted a 2nd or 3rd opinion before I proceeded with buying a replacement board.

I received the prevalent 3-blinking light pattern a week or so ago.

So after opening it up I noticed the two 3300uf capacitors on the power supply were bloated, and I have already replaced those. Powered the TV back up and I still receive the 3-blinks.

I continued my diagnosis through the 'removing a board from the equation' method of testing, as I don't have a multimeter on hand at the moment.

First, I disconnected the SDR-U and SDR-D boards separately, but the TV would still go into the 3-blinking light pattern.

Secondly, I disconnected the Y-SUS board. After that, the TV went into a 4-blink pattern.

I then reconnected the Y-SUS board (and buffer boards) and disconnected the X-SUS board. With the X-SUS board disconnected, the blue power light now stays on and does not go into a blink pattern.

So, those who have been doing this for awhile, does that mean my X-SUS board is indeed the problem? And is there anything on the board itself that can be replaced/repaired, or should the whole board be replaced?

Thanks for any assistance or additional information you all can provide!

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wgmontgomery

· #2 · Aug 12, 2012

Welcome to HTS!!!

I'm sorry that I can't offer more input on your question, but I did not want you to feel ignored. This may help.

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lcaillo

· #3 · Aug 13, 2012

I do not recall the troubleshooting procedures for this set so I can't answer your question directly, chaz. I would download the service manual for it (try elektrotanya.com) and review it carefully for diagnostic procedures if there are any.

There are parts on the boards that can be replaced but without some troubleshooting skills and the right tools you are unlikely to get very far. Most problems with these sets seem to be on the buffer boards, y-sus, and power supply. I would not assume based upon what you have provided that the x-sus is the problem. You might read the related threads...

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chaz

Discussion Starter · #4 · Aug 13, 2012

Thanks for the reply, guys. I have read the related threads, but have not seen the specific blinking issue in my situation, which is why I created this thread.

3-blinks with all the boards plugged in.
0-blinks with just the Y-SUS plugged in.
0-blinks with Y-SUS AND SDR boards (one at a time and together) plugged in.
0-blinks with no X-SUS or Y-SUS or SDR boards plugged in.
4-blinks with just the X-SUS plugged in.

If I'm getting an error pattern when the X-SUS is plugged in, in both the 3-blink and 4-blink pattern, why would I not assume it's the X-SUS if I've already replaced the power supply caps? It seems logical, based on the blinking error report system.

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chaz

Discussion Starter · #5 · Apr 29, 2013

Just thought I'd update everyone. My diagnosis was correct, it was my X-SUS board that had to be replaced, as well as my SDR-D board.

Found both for about $55 each and my TV has been up and running perfectly ever since.

Cheers!

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lcaillo

· #6 · Apr 30, 2013

Great! Thanks for the follow up. It may help someone else.

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Plasmajunkie

· #7 · Jul 8, 2013

chaz said:
Just thought I'd update everyone. My diagnosis was correct, it was my X-SUS board that had to be replaced, as well as my SDR-D board.

Found both for about $55 each and my TV has been up and running perfectly ever since.

Cheers!

I have mine apart, saw the bloated caps but my screen is flashing then shutting down, no half screen problems.I already removed and ordered the new caps $10.88.I sure hope this fixes it.I'll let ya know when the cap's make it from Hong Kong.Glad to find this forum, ya just cant find techjunkies just anywhere.I'm a Hydraulics Engineer with an Electrical Controls Degree but there is nothing like fixing your own Tech Issues:help:

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Plasmajunkie

· #8 · Jul 25, 2013

Put the caps in and the power comes on, fan's start then nothing.Power light stays on.Gonna take my time and resolder.I am new at this ....Changed a million cards but repairing them is something completely different.

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