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sidsparks
Joined: 25 Jan 2007 Posts: 8 Location: The Toon
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Posted: Thu Jan 25, 2007 1:25 pm Post subject: Sony CMT-CP101 Q330 |
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Have just replace Q330 with a PDTC124ET. Unit working fine.
I have more of these transistors available if anyone needs them. |
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Nibbos
Joined: 24 Oct 2007 Posts: 8
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Posted: Thu Oct 25, 2007 10:10 am Post subject: |
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Could any of the people who have successfully changed the transistor Q330 and jumper JW307 (or is it JW370?) please share with me the LOCATION of these parts, please?
I cannot find the appropriate service manula for diagrams and need some help in locating these items in the innards of my stereo!
Many thanks in advance.
Nibbos |
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sidsparks
Joined: 25 Jan 2007 Posts: 8 Location: The Toon
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Posted: Thu Oct 25, 2007 11:51 am Post subject: Q330 Location |
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If you remove the cover you will see a pcb on the right hand side with the surface mount components on the side facing you. If you take a picture and post it on here I will be able to locate the transistor for you. |
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Nibbos
Joined: 24 Oct 2007 Posts: 8
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Posted: Thu Oct 25, 2007 11:56 am Post subject: |
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will do, sidsparks, although model is actually cp101 and not cmt101 as originallythought. However, CP101 schematic also has q330 transistor, so I'll take a pic and post it anyway.
Could you also point out jumper that needs replacing with 470 ohm resistor, please?
Thanks
Nibbos |
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Nibbos
Joined: 24 Oct 2007 Posts: 8
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Posted: Thu Oct 25, 2007 12:41 pm Post subject: |
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OK, here it is:
http://www.flickr.com/photos/amstram/1744378569/
and
http://www.flickr.com/photos/amstram/1744379231/
I've put notes on the first to identify what I think are the right components - that's how they're labelled on the circuit board.
Now all I need is the transistor and to learn how to remove and replace very small components from these circuit boards.
Is there a tutorial anywhere on how to do this?
Thanks so far.
Regards
Nibbos |
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sidsparks
Joined: 25 Jan 2007 Posts: 8 Location: The Toon
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Posted: Thu Oct 25, 2007 1:27 pm Post subject: Q330 Location |
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Looks like you have identified the correct components. It looks like the same model that I replaced components in.
I'm sure there must be info already on web regarding replacing SM components. |
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Nibbos
Joined: 24 Oct 2007 Posts: 8
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Posted: Thu Oct 25, 2007 2:06 pm Post subject: |
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Thanks, sidsparks. It's good to know when you get something right!
I'll research the de-soldering and re-soldering bit.
Should I replace the transistor AND put a 470ohm resistor in place of the jumper, or jst do one of them?
Thanks again.
Nibbos |
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Nibbos
Joined: 24 Oct 2007 Posts: 8
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Posted: Thu Oct 25, 2007 4:34 pm Post subject: |
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Can I de-solder and replace with just a standard DIY soldering iron? it looks like the component is very small and there's lots of little solder points very close together!
Any advice?
Thanks
Nibbos |
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sidsparks
Joined: 25 Jan 2007 Posts: 8 Location: The Toon
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Posted: Thu Oct 25, 2007 6:54 pm Post subject: Replacing Q330 |
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You can use a standard soldering iron but make sure it has a fine tip. you will also need some fine solder.
Have a look at this.
http://www.sparkfun.com/commerce/present.php?p=SMD-HowTo-3
Use the same technique that is used for removing the 0603 resistor |
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sidsparks
Joined: 25 Jan 2007 Posts: 8 Location: The Toon
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Posted: Thu Oct 25, 2007 7:13 pm Post subject: |
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Nibbos wrote: | Should I replace the transistor AND put a 470ohm resistor in place of the jumper, or jst do one of them?
Nibbos |
I replaced both. |
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