[TechAssist] Re: Kenwood KR594, need schematic
- From: "Dan Williams" <wizhd@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 24 Jun 2005 11:42:12 -0500
Blew up a yamahe receiver once, called yamaha and they said the bulb was the
reason why.
Wizard Electronics
Jacksonville, TX 75766
wizhd@xxxxxxxxxxxxxxxx
----- Original Message -----
From: "becyn" <becyn@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, June 24, 2005 11:01 AM
Subject: [TechAssist] Re: Kenwood KR594, need schematic
> You're right, but thats mostly a handfull of poorly designed combos or
> units with exotic power supplies. This is not one of those.
> It worked fine WITH the bulb. It was the "normal" mode with the fuse
> that caused it to fail.
>
> Usually the bulb is a great indicator of excessive bias or latch up
> without
> the attendant destruction of new components.
> I always check for correct Dc balance before attaching the loads.
>
> What amp of yours didn't like "the bulb"?
>
> Jim McVey
> McVey Alltronix
> 327 Broadway
> Newburgh N.Y. 12550
>
> "If it doesn't play...
> CALL MCVEY !!!!!!"
> Factory authorized
> service for over 20
> major brands.
> 845 561 8383
> (Last of the Mohegans)
>
> Dan Williams wrote:
>
>>"ran it with a current limiting bulb
>>in the
>>fuse slot." i HAVE TRIED THIS BEFORE AND SOME AMPLIFIERS DON'T LIKE IT!!
>>Sorry for shouting. You probably have leaky xistor in pre-amp and will
>>have
>>to replace all pre-amp as well as amp outputs. HTH
>>
>> Dan W
>>Wizard Electronics
>>Jacksonville, TX 75766
>>wizhd@xxxxxxxxxxxxxxxx
>>----- Original Message -----
>>From: "becyn" <becyn@xxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Friday, June 24, 2005 9:36 AM
>>Subject: [TechAssist] Kenwood KR594, need schematic
>>
>>
>>
>>
>>>Hello all,
>>>
>>>I got this in with a "simple" problem. The two outputs on one of
>>>channels were shorted and no resistors or pre drivers seemed to be
>>>defective. Changed the outputs, and ran it with a current limiting bulb
>>>in the
>>>fuse slot. It passed the load test under the current limited condition
>>>just fine.
>>>
>>>Once the fuse was inserted and ran up to full power, the same channel
>>>shorted it's
>>>outputs!
>>>
>>>Seems like I need to take a closer look...
>>>
>>>Jim McVey
>>>McVey Alltronix
>>>327 Broadway
>>>Newburgh N.Y. 12550
>>>
>>>"If it doesn't play...
>>>CALL MCVEY !!!!!!"
>>>Factory authorized
>>>service for over 20
>>>major brands.
>>>845 561 8383
>>>(Last of the Mohegans)
>>>
>>>
>>>
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>>
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