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Kenwood KC-206 Stereo Control Amp repair

 
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Ron



Joined: 22 May 2005
Posts: 1
Location: Baton Rouge
PostPosted: Sun May 22, 2005 12:55 pm    Post subject: Kenwood KC-206 Stereo Control Amp repair Reply with quote
Hey gang,

Anyone ever tried to troubleshoot a Kenwood KC-206? I have one that has lost one of its output channels. The bad channel is still sort of there, but crackles a lot and frequently disappears completely. I have been out of electronics repair for a long time, but am still handy with a soldering iron. Any suggestions would be appreciated. The unit is about 20 years old.

Thanks,

Ron
_________________
Pilots say "If you want to go up - pull back. If you want to go down - pull back some more!"
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James Sweet
Guest
PostPosted: Tue Sep 12, 2006 4:04 am    Post subject: Re: Maytag Neptune motor not running! Reply with quote
elacesar wrote:
Quote:
Hopefully i can get some help with my Neptune here. My problem is
that i was changing the drain pump on my washer which was no problem
but when i connected it and started it i noticed a spark from a cut
orange wire which leads to the drive motor board and i saw that the
10 amp fuse was blown. I disconnected, repaired the wire, and i
replaced the fuse but once i start the washer the motor will start
for a second then the fuse blows. The washer will drain the water
but the motor will not spin. I checked the rest of the wires for any
shorts and i am stuck at this spot.. Could someone give me a little
help? Thanks



Sounds like you blew one of the MOSFETs on the motor drive board. Do you
have the old through-hole board or the newer surface mount one in the
plastic box? Either way they're essentially VFDs driving a 3 phase
induction motor. The MOSFETs are replaceable, though it may have also
blown the driver chip. In my case I got very unlucky with one of these
and it blew not only half the MOSFETs and two of the driver chips but
took out the large custom controller chip as well, it was time for a new
motor board.
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James T. White
Guest
PostPosted: Thu Sep 14, 2006 3:19 am    Post subject: Re: Maytag Neptune motor not running! Reply with quote
"elacesar" <no@spam.invalid> wrote in message
news:12gc14ol9gjpj5b@news.supernews.com
Quote:
Hopefully i can get some help with my Neptune here. My problem is
that i was changing the drain pump on my washer which was no problem
but when i connected it and started it i noticed a spark from a cut
orange wire which leads to the drive motor board and i saw that the
10 amp fuse was blown. I disconnected, repaired the wire, and i
replaced the fuse but once i start the washer the motor will start
for a second then the fuse blows. The washer will drain the water
but the motor will not spin. I checked the rest of the wires for any
shorts and i am stuck at this spot.. Could someone give me a little
help? Thanks

Sounds like you shorted out one of the output phases of the motor drive
board. From what I've seen, you will likely need to buy a replacement
board as faults like this generally damage more than just the output
MOSFETS.

--
James T. White
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Dave Plowman (News)
Guest
PostPosted: Fri Nov 10, 2006 5:19 pm    Post subject: Re: 8mm video Reply with quote
In article <12l8oojku7ij9ee@news.supernews.com>,
dougreed <no@spam.invalid> wrote:
Quote:
Hi again, this forum did so well on identifying the tuner malfunction
on my TV that now I have a question about a Sony 8 mm video PLAYER. I
have an old 8mm player ( player only, no record mode ) that never got
much use, but one day it just started playing tapes in the slow tape
speed and will kind of jump like it's trying to switch to the higher
tape speed. Everything else about it seems to work fine, and when
it's not trying to jump to the next speed the slow motion is nice.
Any manual, electric or optical switch that may be at fault? or what?
I like to use it instead of the camera to watch my tapes...thanks,
dougreed

First thing I'd look at would be the control track head - this is a fixed
head that reads pulses off the tape. Some types of players use one which
is stacked with the linear audio one. A good clean wouldn't harm.

--
*I wished the buck stopped here, as I could use a few*

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
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