[TechAssist] bad again!,Sanyo DS25330 unusual symptom/fix for dead set,R409 ID?
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 08 Nov 2004 11:10:58 -0500
Thought I fixed this problem with the STR30130 IC.(see original thread
below)
Ran all day. Turned it off, then tried to turn it on. No go. Same issue
as before. Dead. I am replacing C007 (4.7@160V) and R005 (220K) both ib
the PS near the str30130. Maybe they go bad under load, or warm.
I also have a 2 watter R409 I pulled and need to check:. Reads about 7K
but I need it's value.
Thanks.
Phil Bader
Phil Bader wrote:
>Originally set was said to be dead after storm. Tho it powered up OK on
>the bench, there were many,many bad solder connections and overheated
>areas of the board. Thoroughly resoldered, tested, and sent home.
>Customer said it never did run at home after repair. Customer returned
>it. Plugge it in. Ran good immediately. Powered on with my remote
>(customer has none) and with the front power button OK.
>I plugged it into the power strip on the test area and dead. Plugged it
>into my Sencore PoweriteII PR570 isolation transformer , and also dead.
>Even tried increasing/decreasing the line voltage.No help.
>Plugged it back in on the bench, works!
>Here's the thing:
>My bench uses a single outlet 1:1 isolation transformer that I always
>plug in the TV under test. The set WORKS with that isolated outlet.
>Plugging in direct into the UN-isolated power strip next to it DOES NOT
>let it power up. My Sencore PR570 DOES NOT let it power up.It's
>isolated! Only my small 1:1 isolation transformer at the bench lets it work.
>I replaced the STR30130 regulator, and problem cleared. Fixed! Note: The
>old str30130 outputted exactly +130 volts DC with perfect picture.
>Now I would understand it working with the isolation and not the direct
>wall outlet,(leakage) but wouldn't even power on with my Sencore
>isolation unit. Strange.
>Phil Bader
>
>
>
--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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