[TechAssist] fix Mitsubishi CS-2720R low brightness, sides pulledin, C960,C957bad

The final fix is the regulator STRD3030, besides the two bulged caps ,

C960
(10mfd/160V) 
C957 (47mfd/200V)
These were connected to this IC, so the caps damaged the reg IC.
Replacement of STRD3030 restored the operation.Thanks, all.
phil Bader


Max Bonnell wrote:

>Phil,
>STR 3030 and STR 3130 both cross to NTE 1742 but STR 30130 crosses to
>NTE 1777. If you need a STR3130 let me know.
> 
>Max Bonnell
>Bonnell TV
>Robinson, IL
>
> 
>Sender: techassist-bounce@xxxxxxxxxxxxx From:
>premtech@xxxxxxxxxxxxxx(William=A0Rayburn) Date: Sat, May 29, 2004,
>8:41am (CDT-2) To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re:
>Mitsubishi CS-2720R low brightness, sides pulled in, C960, C957bad
>Reply=A0to: techassist@xxxxxxxxxxxxx 
>Phil, 
>Sure!! You'll simply be running 135v instead of 130 on your B+ which
>shouldn't harm anything for a quick verification. I wouldn't run it a
>long time, but for test purposes it should work just fine. The STRD3030
>also subs to an NTE1777 and the STR30130 will work as a permanent sub. 
>Bill 
>William H. Rayburn, CET
>NESDA Member
>Premium Technologies
>PO Box 442
>Long Beach, Wa. 98631 
>(360) 642-4993
>----- Original Message ----- 
>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Saturday, May 29, 2004 8:15 AM
>Subject: [TechAssist] Re: Mitsubishi CS-2720R low brightness, sides
>pulled in, C960, C957bad 
>I happen to have some STRD3035 ICs in stock (same package). Would these
>do as a temporary test for troubleshooting? In past diagnostics, I've
>subbed STR30135 for 30130's, etc. It was off by 5 volts and did no harm,
>but verified if the device was bad or not. Phil Bader 
>William Rayburn wrote: 
>Phil, 
>If C960 was bad and didn't correct the problem also replace the
>regulator IC951, Strd3030, which is most likely leaking and check R954
>for open or changed in value, (120ohm/30w). It's between IC951 and C957. 
>If that corrects the sides from pulling in but not the brightness check
>D210 off pin 8 of the FB for shorted. 
>Hope this helps
>Bill 
>William H. Rayburn, CET
>NESDA Member
>Premium Technologies
>PO Box 442
>Long Beach, Wa. 98631 
>(360) 642-4993
>----- Original Message ----- 
>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Saturday, May 29, 2004 6:20 AM
>Subject: [TechAssist] Re: Mitsubishi CS-2720R low brightness, sides
>pulled in, C960,
>C957bad 
>Thanks, but C460 is a 100mfd@35volts in the Vertical, and is fine. This
>seems to be a horiz. deflection or PS issue. I was also told to check
>C516 (no value given)but I can't locate that. Thanks anyway. 
>Phil Bader 
>Eric Manuel wrote: 
>Hi Phil check this tip Eric 
>
>A0Horizontal
>def INSUFFICANT, PIX MAY
>C460
>10/160,
>STRD3030 
>(MAY
>USE STR30130
>WITH 
>Eric Manuel
>A0Deer Lake Nfld 
>INSULATOR) 
>Phil Bader wrote: 
>The picture is low brightness with the horiz width pulled in several
>inches both sides. In the PS I found two bulged lytics: C960
>(10mfd/160V) 
>C957 (47mfd/200V)
>Replaced both no change.
>Nothing in archives I see.
>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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