Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Sorry, I got busy with car and house repairs. I ended up replacing the board and haven't circled back to diagnose the original failed board....
egoh
Member
Last Activity: 02-20-2024, 07:30 PM
Joined: 08-01-2016
Location: Austin, TX
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Will do, got delayed fixing my wife's car, but I'll post back soon. Thanks again for all the help!Leave a comment:
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Any idea what the specs are on C7906 (no markings) and D7910 (has a 202 on it)? I get a little nervous working with SMD stuff and not having a backup. Remember the good old days when everything had a schematic?
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Removed and tested D7904 and D7950. They tested fine once removed from the circuit. I think I'm leaning towards the IC being shorted. I'll have to save the C7906 and D7910 test for tomorrow. I have my 4 year old watching, but his patience is about up. Thanks so much for your help! It looks like I'll have to get an order together soon.Leave a comment:
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
IC7903 looks to be an A6069H. I found this data sheet: [url]https://cdn.badcaps-static.com/pdfs/4cbf5174b373556c65e64ffdd208375d.pdf[/url]
It's getting 161V between pins 8 and 3. I'm only measuring .031V between pins 5 and 3.
D7950 is testing strangely. Forward voltage drop is .315V, but when I test the reverse voltage, it hunts around in between -1.5V and -1.9V before it finally settles on 0. [Edit - tested OK once removed from the circuit]
I'm pretty sure D7904 is shorted with .012V drop in both...Leave a comment:
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Correct, no DCV on any any output pin. Sorry, I should have mentioned that I tested with the other boards disconnected last night. Just tested again to be certain. No output whatsoever even without load on the power supply....Leave a comment:
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Re: Sharp LC-60SQ15U TV DPS-167CP - No power
Thanks for the quick reply! R7900 is measuring 2.4 Ohms....Leave a comment:
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Sharp LC-60SQ15U TV DPS-167CP - No power
Hi everyone!
This Sharp LC-60SQ15U TV was hit by a near lightning strike. The Delta DPS-167CP power supply has no power output at all, thus no power to the screen, no LEDs, etc. My first order of business is to try to figure out why it doesn't have any 5V constant output.
The fuse at F7001 is fine. The large rectifier at BD7001 has 160.3VDC measured on the far leads. All the capacitors look visually OK and test OK with an in circuit ESR tester. A quick check of the resistors doesn't show any that are open circuit, but I haven't checked their exact measurements yet.... -
Re: New Members - please post your introductions here
Hi All! Greeting from Austin, Texas.
Just joined to find some info on a newer Sharp TV with a dead power supply. Been restoring audio equipment for a long time, especially 80's and 90's Bang & Olufsen.
Thanks for a great community!Leave a comment:
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