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o2thx
Joined: 14 Jan 2007
Posts: 10
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 Posted: Sun Jan 14, 2007 11:45 pm Post subject: Hitachi 50UX58B Dead w/ Red Light |
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A friend just gave me his Hitachi 50UX58B because it died and he used that as an excuse to get a new TV.
I told him I'd take it and see if I can get it working myself, I've always like to tinker with electronics.
The symptoms are that when I plug it in, the Red LED turns on for a few seconds, then disappears. It won't power up at all, it's dead.
As I've read through other topics in this mb, I've come across some people saying that I should replace the c707 and e994 fuses.
I haven't looked at the circuit board yet to find where those are, but does anyone know where I can buy those fuses? Are they standard type fuses that I can pick up at any Electronics store? Are they hard to find on the board?
Any other suggestions that might be the cause for this dead TV?
Thank you for any help! |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Sun Jan 14, 2007 11:54 pm Post subject: |
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| C707 and e994 fuses are a good place to start. Convergence IC's are also a common failure. Tritronicsinc.com is a great place to look up parts. |
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o2thx
Joined: 14 Jan 2007
Posts: 10
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| Posted: Mon Jan 15, 2007 12:25 am Post subject: |
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| Got any tips on where to look for these fuses when I am looking at the board? Any easy way to find them? |
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o2thx
Joined: 14 Jan 2007
Posts: 10
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o2thx
Joined: 14 Jan 2007
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o2thx
Joined: 14 Jan 2007
Posts: 10
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| Posted: Fri Jan 19, 2007 6:36 am Post subject: |
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| minnie wrote: | He's the suggested repair.
Replace R905 p#0148009, Volt.Reg.IC901 p#2373343, D906 30v Z.Diode p#46-861664-3, D907 9.1V Z.Diode p#46-861159-3, I 902,903 p#2913945 |
Minnie, I saw you post this on another thread.
I replaced my c707 and it still doesn't work.
The e994 is in tact, isn't "popped" or anything like that. When I plug the TV in, I hear things start up, 5 out of the 6 green LED's that I can see turn on, but the green LED that is closest to the e994 protector doesn't turn on and then the other 5 green LED's turn off as the red "Protect" LED flashes on and off.
Any suggestions on my next step? If one of those parts that you listed in the quote above were bad, would I be able to tell just be visual inspection?
Thank you for your help! |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Fri Jan 19, 2007 10:45 pm Post subject: |
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| Did you check E996? Check all your pico fuses and let me know. |
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o2thx
Joined: 14 Jan 2007
Posts: 10
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| Posted: Sat Jan 20, 2007 1:03 am Post subject: |
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| minnie wrote: | | Did you check E996? Check all your pico fuses and let me know. |
Well, upon visual inspection, it seems fine, intact. I haven't noticed any others around that area that look damaged.
Could something be damaged without being to visually see "proof" of damage. like a crack in it or something? |
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o2thx
Joined: 14 Jan 2007
Posts: 10
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| Posted: Sat Jan 20, 2007 2:31 am Post subject: |
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After looking more closely at the green LED's on the board, I see that they are all labeled on the board.
The one green LED that does not light up is labeled "+B 120V"
Does that give any insight into what's wrong? |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Sat Jan 20, 2007 4:30 pm Post subject: |
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| Is it D940? |
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