[TechAssist] Re: JVC AV-36980 Loud Squeel
- From: "Tim Poole" <tdp13158@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 16 Nov 2004 01:52:49 -0500
The set comes on and plays perfectly with this squeel until it shuts down.
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, December 15, 2004 6:39 PM
Subject: [TechAssist] Re: JVC AV-36980 Loud Squeel
> Shorted HOT? Shorted secondary diode?
>
> 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 4:29 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: JVC AV-36980 Loud Squeel
>
> Thanks for the reply, but this sound is coming from the power supply
> transformer.
> ----- 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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