[TechAssist] Re: JVC AV-36980 Loud Squeel
- From: "Tim Poole" <tdp13158@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 2 Dec 2004 19:46:17 -0500
Thanks Eric,
Yes this cap has been replaced as well as the regulator. Set had both bad,
but after replacing them both the set powers up but has a loud squeel and
shuts down after playing a few minutes. I checked all diodes and caps but
cant go any further without a print. Thanks, Tim
Tim Poole tdp13158@xxxxxxxxxxx
dba A-Mobile TV Shop & Precision TV Service
Fredericktown, Ohio 43019
419-756-3443
740-694-8585
fax 740-694-1032
----- Original Message -----
From: <tvman@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 02, 2004 1:08 PM
Subject: [TechAssist] Re: JVC AV-36980 Loud Squeel
> Hi Tim make sure you replace this cap in the power supply it may be
> leaking
> fluid
> on the board..Eric
> AV36980 DEAD NO CLICK C926 1000-35V
> E M Electronics
> Deer Lake NL
> Canada
> tvman@xxxxxxxxxxxxxxx
> eric.manuel@xxxxxxxxx
> ----- Original Message -----
> From: "Tim Poole" <tdp13158@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, December 02, 2004 2:07 PM
> Subject: [TechAssist] Re: JVC AV-36980 Loud Squeel
>
>
>> Do you have a print of the power supply you or someone could send me? I
> have
>> replaced the regulator with another one and checked all diodes with no
>> success. Any help would be greatly appreciated. Thanks, Tim
>>
>> Tim Poole tdp13158@xxxxxxxxxxx
>> dba A-Mobile TV Shop & Precision TV Service
>> Fredericktown, Ohio 43019
>>
>> 419-756-3443
>> 740-694-8585
>> fax 740-694-1032
>> ----- Original Message -----
>> From: "Shoreline Electronics" <jstielau@xxxxxxxx>
>> To: <techassist@xxxxxxxxxxxxx>
>> Sent: Tuesday, November 16, 2004 9:09 AM
>> Subject: [TechAssist] Re: JVC AV-36980 Loud Squeel
>>
>>
>> > You didn't take the chassis? Tsk tsk.....
>> >
>> > In the primary of the smps , check ALL diodes. I had one of these a
>> > few
>> > months back but didn't make note of the location...you will find one in
>> > there that is shorted/leaky. Your STR should be OK.
>> >
>> > ==========================
>> > Jeff Stielau
>> > Shoreline Electronics Repair
>> > 344 East Main Street
>> > Clinton,CT 06413
>> > 860-399-1861
>> > 860-664-3535 (fax)
>> > jstielau@xxxxxxxx
>> > ========================
>> > "If you push something hard enough it will fall over."
>> > Fudd's First Law of Opposition - Sir Sidney Fudd
>> >
>> >
>> > ----- Original Message -----
>> > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
>> > To: <techassist@xxxxxxxxxxxxx>
>> > Sent: Wednesday, December 15, 2004 6:22 PM
>> > Subject: [TechAssist] Re: JVC AV-36980 Loud Squeel
>> >
>> >
>> >> Not sure if this is the same problem? From: http://wa6ati.com/Jvc.html
>> >>
>> >> "Customer complains of an intermittent "whistle" or high pitch squeal
>> >> noise coming from the set. This procedure is not on the JVC website as
>> >> of now, but is provided by JVC Field Support. This noise problem may
>> >> be
>> >> caused by the focus element in the CRT. To verify the problem,
>> >> disconnect the H-Pulse going to CN00Q on the DAF (Dynamic Auto Focus)
>> >> and test the unit for an extended time. Note: the corner focus will
>> >> not
>> >> be as clear with this line disconnected. Change C2701 on the DAF board
>> >> to a .27uf/50v Mylar capacitor, (JVC part # QFV71HJ-274). Changing the
>> >> value of this capacitor lowers the amplitude of the horizontal pulse
>> >> going to the DAF circuit. After replacing this capacitor, focus
> touch-up
>> >> is necessary. This should solve the squeal problem."
>> >>
>> >> David Lessard
>> >> Alexandria, Ontario. Canada
>> >> mr_fixit@xxxxxxxxxxxx
>> >>
>> >> -----Original Message-----
>> >> From: techassist-bounce@xxxxxxxxxxxxx
>> >> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Poole
>> >> Sent: Tuesday, November 16, 2004 4:00 AM
>> >> To: techassist@xxxxxxxxxxxxx
>> >> Subject: [TechAssist] JVC AV-36980 Loud Squeel
>> >>
>> >> I replace the STRF6626 regulator and electrolytic cap in power supply
>> >> and set now comes on with loud squeel and then shuts down after
>> >> several
>> >> minutes of operation. Set will then come back on when unpluged and
>> >> then
>> >> pluged back in after it cools down. Anyone seen this? I may have a bad
>> >> new regulator but wanted to check before I went back out to the
>> >> customers house to replace it. Thanks, Tim
>> >> Tim Poole pooletim@xxxxxxxxxxx tdp13158@xxxxxxxxxxx
>> >> dba A-Mobile TV Shop & Precision TV Service
>> >> 17626 Shady Lane
>> >> Fredericktown, Ohio 43019
>> >>
>> >> 419-756-3443
>> >> 740-694-8585
>> >> fax 740-694-1032
>> >>
>>
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