Capacior leak on my GK 800RB

jeyvi · 22nd December 2005, 03:59 AM

i thought my power transformer smoked. when i plugged it again and opened the cover. after 3 seconds one of the 470uf 63v capacitors emitted smoke. it has leak!

will it be possible to order a capacitor here in the GK site store?

if i can get the capacitor here... is it ok if i only change the one with a leak or i have to change all 4 capacitors?

and... there's a capacitor with the same values but its a vertical one. but the one on the 800RB head is a horizontal type capacitor.
will it be ok if i replace it with a vertical type?

i need your help GK guys ASAP!

thanks very much!!!

Zero Cool · 23rd December 2005, 02:06 PM

If one is bad, the other 3 are almost bad. If it was my amp, i would replace all 4.

scottnixon · 23rd December 2005, 02:40 PM

I agree out replacing all 4, but I'd up the voltage to a 75v cap. The 100w amp section (which the 470/63 are for) runs 60v rails. A cap higher than 63V might survive better.

jeyvi · 23rd December 2005, 08:38 PM

alright...

i've replaced the one that leaked. and i plugged it to see if it works. then again... after 3-5 seconds... the other 3 capacitors smoked!

now i dont know whats causing them capacitors to blow and smoke.

im afraid if i replace all 4. the other 4 bigger capacitors might get smoked as well.

theres no service center here... so i'll probly just have it checked by a good technician.

damn... i havent even used the amp yet.

thanks very much

jeyvi · 26th December 2005, 09:24 AM

bump

Netlist · 26th December 2005, 09:46 AM

A few possibilities come to mind:
You reversed the polarity of the cap. Electro's don't survive that.
More probably, as the old one died as well, is a broken rectifier diode before the cap. Replace it anyway, as I have found myself in the situation that a perfectly good diode seemed to behave badly under working conditions.

/Hugo

22nd December 2005, 03:59 AM	#1
jeyvi diyAudio Member Join Date: Dec 2005 Location: Philippines	Capacior leak on my GK 800RB i thought my power transformer smoked. when i plugged it again and opened the cover. after 3 seconds one of the 470uf 63v capacitors emitted smoke. it has leak! will it be possible to order a capacitor here in the GK site store? if i can get the capacitor here... is it ok if i only change the one with a leak or i have to change all 4 capacitors? and... there's a capacitor with the same values but its a vertical one. but the one on the 800RB head is a horizontal type capacitor. will it be ok if i replace it with a vertical type? i need your help GK guys ASAP! thanks very much!!!

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23rd December 2005, 02:06 PM	#2
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	If one is bad, the other 3 are almost bad. If it was my amp, i would replace all 4.

23rd December 2005, 02:40 PM	#3
scottnixon diyAudio Member Join Date: Mar 2001 Location: High Point, NC	I agree out replacing all 4, but I'd up the voltage to a 75v cap. The 100w amp section (which the 470/63 are for) runs 60v rails. A cap higher than 63V might survive better.

23rd December 2005, 08:38 PM	#4
jeyvi diyAudio Member Join Date: Dec 2005 Location: Philippines	alright... i've replaced the one that leaked. and i plugged it to see if it works. then again... after 3-5 seconds... the other 3 capacitors smoked! now i dont know whats causing them capacitors to blow and smoke. im afraid if i replace all 4. the other 4 bigger capacitors might get smoked as well. theres no service center here... so i'll probly just have it checked by a good technician. damn... i havent even used the amp yet. thanks very much

26th December 2005, 09:24 AM	#5
jeyvi diyAudio Member Join Date: Dec 2005 Location: Philippines	bump

26th December 2005, 09:46 AM	#6
Netlist diyAudio Moderator Join Date: Jan 2003	A few possibilities come to mind: You reversed the polarity of the cap. Electro's don't survive that. More probably, as the old one died as well, is a broken rectifier diode before the cap. Replace it anyway, as I have found myself in the situation that a perfectly good diode seemed to behave badly under working conditions. /Hugo

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