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Old August 31st 08, 05:05 PM
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anyone seen a surface mount part only markings on it are d k 9 z.it's on a kenwood handheld tranceiver of mine which has burnt out.would appreciate any info?
many thanks
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Old August 31st 08, 11:02 PM posted to rec.radio.amateur.homebrew
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Is it a plastic bodied component? Does it have one terminal at each end?
If yes, I'm guessing it's a diode.

-Joe


In article ,
confused wrote:

anyone seen a surface mount part only markings on it are d k 9 z.it's on
a kenwood handheld tranceiver of mine which has burnt out.would
appreciate any info?
many thanks

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Old September 1st 08, 08:50 AM
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Quote:
Originally Posted by Joe LeKostaj View Post
hi joe thanks for your response.it has 3 pins on one side and on thicker pin like a small heatsink looks like this http://images.google.co.uk/imgres?im...icial%26sa%3DG
i'd appreciate any help on where to get another or an equivalant.i've looked through shed loads of smt code books online cant find same code.i've tried contacting kenwood????

thankyou
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Old September 1st 08, 02:00 PM posted to rec.radio.amateur.homebrew
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Ahh, so its a transistor

Do you have a schematic? Is there another transistor with the same
markings?

A lot of times transistors are pretty generic and you can throw in "any old
thing". If that is the case, you should be able to tell from the schematic.
If not, and you have another, perhaps someone has a semiconductor analyzer
and can measure the parameters of a good one, and then you can figure a
replacement based on the parameters.

Of course, you would hope that Kenwood would be anxious to help

...

"confused" wrote in message
...

Joe LeKostaj;644551 Wrote:
Is it a plastic bodied component? Does it have one terminal at each end?

If yes, I'm guessing it's a diode.

-Joe


In article ,
confused
wrote:
-
anyone seen a surface mount part only markings on it are d k 9 z.it's
on
a kenwood handheld tranceiver of mine which has burnt out.would
appreciate any info?
many thanks-


hi joe thanks for your response.it has 3 pins on one side and on
thicker pin like a small heatsink looks like this
http://tinyurl.com/5ltz2j
i'd appreciate any help on where to get another or an equivalant.i've
looked through shed loads of smt code books online cant find same
code.i've tried contacting kenwood????

thankyou




--
confused



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Old September 1st 08, 02:50 PM posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Jul 2007
Posts: 3
Default info wanted

In article ,
confused wrote:

hi joe thanks for your response.it has 3 pins on one side and on
thicker pin like a small heatsink looks like this
http://tinyurl.com/5ltz2j
i'd appreciate any help on where to get another or an equivalant.i've
looked through shed loads of smt code books online cant find same
code.i've tried contacting kenwood????

thankyou


It could be a transistor as the other poster mentioned, but it could
also be a voltage regulator IC. Your best bet would be to obtain a
schematic and/or parts location diagram for your radio to help ID the
component. Then your next stop would be Digi-Key or Mouser to look for a
replacement.

Also, try to determine what caused the part to fail before installing
the new one so it doesn't meet the same fate.

-Joe


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Old September 1st 08, 03:07 PM posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Jul 2006
Posts: 250
Default info wanted

Joe LeKostaj wrote:
In article ,
confused wrote:
hi joe thanks for your response.it has 3 pins on one side and on
thicker pin like a small heatsink looks like this
http://tinyurl.com/5ltz2j
i'd appreciate any help on where to get another or an equivalant.i've
looked through shed loads of smt code books online cant find same
code.i've tried contacting kenwood????

thankyou


It could be a transistor as the other poster mentioned, but it could
also be a voltage regulator IC. Your best bet would be to obtain a
schematic and/or parts location diagram for your radio to help ID the
component. Then your next stop would be Digi-Key or Mouser to look for a
replacement.

Also, try to determine what caused the part to fail before installing
the new one so it doesn't meet the same fate.

-Joe

========================================
The OP did not mention the handheld radio model ,other than it is from
Kenwood. An instruction manual with circuit diagramme(s) of the
relevant radio can highly likely be found at : www.mods.dk

Frank GM0CSZ / KN6WH

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Old September 1st 08, 11:30 PM
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First recorded activity by RadioBanter: Aug 2008
Posts: 4
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Quote:
Originally Posted by Highland Ham View Post
Joe LeKostaj wrote:
In article ,
confused
wrote:
hi joe thanks for your response.it has 3 pins on one side and on
thicker pin like a small heatsink looks like this
http://tinyurl.com/5ltz2j
i'd appreciate any help on where to get another or an equivalant.i've
looked through shed loads of smt code books online cant find same
code.i've tried contacting kenwood????

thankyou


It could be a transistor as the other poster mentioned, but it could
also be a voltage regulator IC. Your best bet would be to obtain a
schematic and/or parts location diagram for your radio to help ID the
component. Then your next stop would be Digi-Key or Mouser to look for a
replacement.

Also, try to determine what caused the part to fail before installing
the new one so it doesn't meet the same fate.

-Joe

========================================
The OP did not mention the handheld radio model ,other than it is from
Kenwood. An instruction manual with circuit diagramme(s) of the
relevant radio can highly likely be found at : www.mods.dk

Frank GM0CSZ / KN6WH
hi,
thanks to all responders .there are three on the same board.the model is a th-26 handheld 2m.i've checked all the surrounding resistors and nearby passives .i think its a power supply problem.i dont want to power it up yet until i find out what this part doesi dont want to take another one of these ants lol out and check it out of circuit.smt is not my thing.i've searched for a free schematic so if anyone out there's got the schematic that'll be great .i'll take on board what you guys have said many thanks for taking the time.
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Old September 2nd 08, 01:49 AM posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Jul 2008
Posts: 242
Default info wanted

On Sep 1, 6:30*pm, confused wrote:
Highland Ham;644645 Wrote:





Joe LeKostaj wrote:-
In article ,
confused wrote:-
hi joe thanks for your response.it has 3 pins on one side and on
thicker pin like a small heatsink looks like this
http://tinyurl.com/5ltz2j
i'd appreciate any help on where to get another or an equivalant.i've
looked through shed loads of smt code books online cant find same
code.i've tried contacting kenwood????


thankyou-


It could be a transistor as the other poster mentioned, but it could
also be a voltage regulator IC. Your best bet would be to obtain a
schematic and/or parts location diagram for your radio to help ID the


component. Then your next stop would be Digi-Key or Mouser to look for
a
replacement.


Also, try to determine what caused the part to fail before installing


the new one so it doesn't meet the same fate.


-Joe-
========================================
The OP did not mention the handheld radio model ,other than it is from


Kenwood. *An instruction manual with circuit diagramme(s) of the
relevant radio can highly likely be found at : *www.mods.dk


Frank * GM0CSZ / KN6WH


hi,
thanks to all responders .there are three on the same board.the model
is a th-26 handheld 2m.i've checked all the surrounding resistors and
nearby passives .i think its a power supply problem.i dont want to
power it up yet until i find out what this part doesi dont want to take
another one of these ants lol out and check it out of circuit.smt is not
my thing.i've searched for a free schematic so if anyone out there's got
the schematic that'll be great .i'll take on board what you guys have
said many thanks for taking the time.

--
confused- Hide quoted text -

- Show quoted text -


More than likely your talking about a transistor maybe a mosfet
The center lead is the collector or drain.
Look for the same numbers on other parts
and measure the forward to back ratio. To determine the kind of
semi it is. should be quite ez. Mostly they using transistors like
this for switching or buffers
so I don't think it could be a darlington.
It's either a npn or pnp.
less likely a FET n channel or p channel
It could still be a zener or a dual diode
Zeners they connect the 2 leads together
And a dual diode will have the same reading on each junction.

73
n8zu
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Old September 2nd 08, 05:14 AM posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Apr 2008
Posts: 543
Default info wanted

========================================
The OP did not mention the handheld radio model ,other than it is from
Kenwood. An instruction manual with circuit diagramme(s) of the
relevant radio can highly likely be found at : www.mods.dk

Frank GM0CSZ / KN6WH


The Service Manuals are available either as a free download from various
places or can be bought online and shipped overnight for a decent price.
All I have seen have extensive parts lists and detailed schematics and board
prints. You head needs to be there if the part is unknown. It could be
bipolar, fet, or even a regulator. If you don't know what model radio you
have, why not?


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Old September 2nd 08, 10:41 AM posted to rec.radio.amateur.homebrew
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First recorded activity by RadioBanter: Sep 2007
Posts: 24
Default info wanted

On Sep 1, 2:05 am, confused wrote:
anyone seen a surface mount part only markings on it are d k 9 z.it's on
a kenwood handheld tranceiver of mine which has burnt out.would
appreciate any info?
many thanks

--
confused


you need to do it logically and scientifically, which is the basis of
our hobby.

1.Get the service manual.
2.Get the part no, try Kenwood, if no go, then
3.Look at circuit diagram, identify component, replace with similar -
its unlikely to be critical.

I suspect you are out of your depth at this stage in your amateur
career, and perhaps it would be wise to seek the help of a local
technician or knowledgeable amateur - your local club could probably
help with contact details...

Andrew VK3BFA.
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