Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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Re: Damaged cdp - suggestions

Posted by mikee55 (A) on October 15, 2005 at 04:12:53

In Reply to: Damaged cdp - suggestions posted by Soundripples on October 14, 2005 at 10:24:30:

Oops,This isn't the way a tweak should turn out!Hi,are you sure you can't temporarly reverse your handywork?It might be possible,I've had it where you've done a mod and don't want to undo it because you know its a significant twaek and you want it to work.A mental thing if you like.Try to reverse!As for testing surrounding parts,what do you think could be suspect?Are the components part of the audio side of things,or power supply?If you think you damaged the supply,measure the voltage.Can you Identify the circuit,bridge or diodes followed by smoothing caps,then possiby some sort of bypass parts and on to Regulators and audio circuits after.Check on the live PCB traces with a meter,plus and minus volts of the same voltage either side of GND.If the smoothy caps have say have 35 volts written on their jackets,the voltage reading you get would be under 35 volts.Can you Identify any regulators?High voltage on one lead,low votage(regulated)out on the other with GND in-between.
Resistors,Can you read coloured bands on them?Or are there any markings on them?If coloured bands,do a Google for Resistor Colour Chart.Put your meter on resistance(ohms) and take a reading to see if it matches with the numbers in the chart.
Capacitors,I don't know how to test these,so if you can read of a printed value,maybe you can replace it and see what it does.
How hot was your iron?I haven't used a powerful one in ages.Mines varible temperature to 50watt.Normaly I think heat damage would be visible.Unless you have surface-mount parts,which are smaller than normal parts.And I've never worked with them.
Sometimes a hot iron can lift a PCB track from the board,on close inspection,I've often lifted a pad,the ring of copper around a component lead,or just created a crack between it and the track,so get a magnifying glass out.Make sure you got a good source of light.It helps somtimes to view your work under Flourescent light or Daylight if weather is good.

Hope something has helped.And if your getting Irate and angry with it,go have a Smoke,Tea,Coffee or a Beer,relax and think of Beach or somthing.It problem could be stareing you in the face.

Let us know how your gettin on.Goodluck.mikee55

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