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Old 17th January 2009, 08:41 AM   #1
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Default Strange resistor color codes

Hi,

I opened an old CD player and came across these strange resistors which have 5 color bands:

white-gold-gold-blue(violet?)-green
on light green background.
(black circled on image)

They just don't make sense, do they?

By the way I found all the diodes of the bridge bypassed with 22 nF ceramics: I believed this solution was only typical of DIYers! (red circled)
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Old 17th January 2009, 09:03 AM   #2
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They are probably inductors.

http://www.elexp.com/t_induct.htm

Cheers!
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Old 17th January 2009, 09:04 AM   #3
raindog is offline raindog  Romania
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Hi,

Indeed very strange ( gold is usualy used to indicate 5% tolerance ); I guess the simplest way to determine the value in this case is to take one out and measure it . By the way bypassing rectifier diodes it's common practice in electronic equipement ( DIY didn't invent electronics , we just try to use the best technical solutions available )
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Old 17th January 2009, 09:05 AM   #4
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Hmmm, sounds strange because they are marked Rxxx on the PCB...

BTW they get quite hot while the cd player keeps seeking (in fact they are a bit elevated from the pcb)
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Old 17th January 2009, 09:06 AM   #5
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Quote:
Originally posted by Davide82
Hmmm, sounds strange because they are marked Rxxx on the PCB...
OK, then they are low ohm resistors, probably military types.

I couldn't see the designation from the pic.

Cheers!
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Old 17th January 2009, 09:46 AM   #6
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Could they be small value inductors?
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