Re: AOC Envision 32 inch L32W761 no picture or sound
Finally received the parts a few days ago. (By the way D920 checked good after removal from the board, was picking up readings from R958). Replaced R933, R976, Q902 and IC902 on original and spare power boards. With original board installed tv came right on and works fine. (I'm surprised someone isn't selling a repair kit for this boards with above parts) My friend says thanks budm.
The spare inverter, t-con and main board all checked good.
But when I installed the spare power board, tv came on and...
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Re: AOC Envision 32 inch L32W761 no picture or sound
Ok, I'll removed q902, it reads 0.5 between S and D, 21.2 between D and G, and 21.2 between S and G.
I'll order ic902, q902, r933, r970, r976, and d920 (which I guess is bad) for both boards, with some spares, hehe. Thanks again budm your have a great night. I'll let ya know when I get the parts in, take it easy.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Desoldered r970 (on both power boards) and both are reading open. I'm glad I waited to order parts, seems like both boards have same exact problem. I was hoping to at least steal parts from one the make the other functional. But not looking that way now.
By the way;
(Original board). (Spare board)
d903; reads 596 and open 592 and open
d907; 748 and open 751 and open
d917; 594 and open 595 and open
zd902; 925 and open. 921 and open
D920; 010 and...Last edited by Bilbo; 04-05-2014, 11:17 PM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
With q902 installed in boards I'm getting .4 ohm original board and .9 ohms on the spare from pin s to d. Or should I remove them from the board for check out? Info you I need to desolder r933 because they may also be bad on both boards.Last edited by Bilbo; 04-05-2014, 08:30 PM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Disregard last post, I read back through post and found the component numbers. I'm researching parts now. Some are stated in other threads, Dynex DX-LCD32 Power Board, looks pretty close to the power board I'm working on. The Dynex is a -2 and mine in a -4.
Originally Posted by fleetwise
PlainBill is right. It is Digikey # 568-5344-1-ND for the TEA1532CT. I also found the mosfet shorted and 2 resisters burned open. I replaced the mosfet (STP10NK70FZP)at location Q902 with one rated for 800 volts. Digikey #...
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Re: AOC Envision 32 inch L32W761 no picture or sound
I'm not sure what you mean by MOSFET and which IC, (guess I need to look at the diagram for that side of the board to learn more) please let me know board location numbers and I'll get them on Order. Sorry kinda tired was a long day at work and getting late for me. Thanks again for all the help and you have a good one budm, night.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Spare board has no 24 volts also. Desoldered r976 from both boards and they are both open. Guess I'll pick up a couple resistors and go from there. Thanks a lot for your time and help.Last edited by Bilbo; 04-05-2014, 12:24 AM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Yes I have an iron, I'll check both to compare, give me a few minutes and I'll get right back to you.Last edited by Bilbo; 04-05-2014, 12:19 AM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Sorry, I'm still a little new at some of this, learning as I go, can ya explain please. Do I need to unsolder to check it?Last edited by Bilbo; 04-04-2014, 11:34 PM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
I thought the power supply diagram was on page 48 of the manual, link on 1st post, or to ya mean for individual part numbers?
I'll look at parts list and on power board for part numbers, thanksLast edited by Bilbo; 04-04-2014, 11:15 PM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Thanks for the reply budm, I'll slave the power board back in and give ya a reply shortlyLast edited by Bilbo; 04-04-2014, 09:25 PM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Ok, after restudying the diagrams, I noticed pin 11 at cn902 on power board is for ps on, which only has 1.87 vdc with power switch on and steady green led on light. With power switch off, at power board top side below cn902 (middle right side of pg 48 in manual) I'm getting 5.3 vdc (coming from +5v source) going into and out of r974, 5.3 at pin 1 and 4.5 at pin 2 on ic904. With power switch on I get 5.33 in and 1.21 out of r974, 1.21 at pin 1 and .07 at pin 2 on ic904. So I de-pinned pin 1 at cn903 on main board (wire coming...Last edited by Bilbo; 04-04-2014, 07:00 PM.
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Re: AOC Envision 32 inch L32W761 no picture or sound
Here's the main board bottom
[ATTACH]83738[/ATTACH]
By the way, sorry for putting picture on five different post, but seems like they are too large for one post. Anyway I've ordered an ESR tester and will check caps more when it arrives. Any suggestions in the mean time?Re: AOC Envision 32 inch L32W761 no picture or sound
Here's the main board bottom
[ATTACH]83738[/ATTACH]
By the way, sorry for putting picture on five different post, but seems like...Last edited by Bilbo; 04-02-2014, 07:55 PM.
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