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carroll
carroll

Posted: Wed Jun 15, 2011 1:22pm

Post Subject: bukh 20 diodes

having trouble with thediode/resister circuitry on the back of the bukh control panel.Do you know which components are used in this panel? Carroll

Tony-B
Tony-B

Posted: Wed Jun 15, 2011 3:29pm

Post Subject: bukh 20 diodes

I am afraid I only have data for the latest DV36 modification and at the moment I can not lay my hands on it - it may well be on the boat. I understand it also depends upon what alternator you have fitted so you need to sort that out. They are perfectly standard electronic components so you should be able to identify them form their markings. If not I think T W Marine at High Peak will be able to supply a suitable plate or perhaps give you the values for those components. As far as I can see the diodes are only used to allow three separate enders (charge, oil pressure & temperature) to operate the buzzer without back feeding to the other warning lamps. I would expect and small (say 500mA +, 30 volt) diode to work. The resistor(s) is/are used in parallel with the charge warning lamp to increase the current flowing to the alternator for energising. You could replace this with a small (say 12V 1.5W) bulb or a 47 ohm resistor (say 2 watt). Tony Brooks

carroll
carroll

Posted: Wed Jun 15, 2011 9:27pm

Post Subject: bukh 20 diodes

thanks Tony.Only one component is damaged.This is a diode marked MR 504 8021 and I would like to establishits spec and/or its equivalentin a modern diode. carroll

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