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Old 7th May 2013, 06:57 PM   #31
Mooly is offline Mooly  United Kingdom
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I can't make the package type out from the scanned manual. I take it that it is an SMD (surface mount) package.
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Old 7th May 2013, 07:23 PM   #32
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yes it seems to be SMD (from 1982). some pictures:
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Old 7th May 2013, 07:29 PM   #33
Mooly is offline Mooly  United Kingdom
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Easy... once you have a bit of experience

Use solder braid to remove most of the solder first and then jewellers screwdriver to gently lift each leg as it is heated with the iron.

Its a bit different to this but you get the idea,
Working with SMD. How to do it without specialised tools.
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Old 7th May 2013, 08:15 PM   #34
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nice manual, looks easy. well, I will try it. unfortunately no time for this yet, but I must to do it. nothing to loose :-)
thank you
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Old 7th June 2013, 08:16 PM   #35
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hello, I am back again.
IC-503 changed and it helps not. the spindle motor is still spinning
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Old 9th June 2013, 06:24 PM   #36
Mooly is offline Mooly  United Kingdom
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Sorry, not ignoring your post I'd have to study the circuit again... as nothing obvious came to mind.
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Old 9th June 2013, 07:50 PM   #37
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hello,
you do not have to apologize. today I have placed the "wrong" IC-503 to the other board where I get the "good" IC-503 and this board is working good (spindle motor is not spinning without reason) so I am sure the IC-503 was OK.
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Old 27th June 2013, 04:18 PM   #38
chartz is offline chartz  France
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Is the little red connector in the middle plugged?
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Old 27th June 2013, 07:04 PM   #39
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yes it is, you probably mean symetric voltage connector.
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Old 27th June 2013, 10:24 PM   #40
chartz is offline chartz  France
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Since with it unplugged the motor will go full throttle at power-up, I was wondering...
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