VintageKustom.com: Replacement Part Suggestions

Home » VintageKustom.com » Replacement Part Suggestions » K100B-5 (Greenpea Here...)

Show: Today's Messages :: Polls :: Message Navigator

Re: K100B-5 [message #25879 is a reply to message #25801]

Tue, 07 February 2017 20:59

chicagobill
Messages: 2006
Registered: April 2003

Senior Member

Start by disconnecting the amplifier circuit from the power supply. At the top of the two filter caps remove the red and green wires that connect to the power amp board. There should be only the red and green wires from the rectifier going to the filter caps and of course the ground connections.

Plug the amp into the limiter and plug the limiter into the wall. Time for the smoke test. Turn on the amp and watch the light bulb. It should briefly light up and then dim down to almost off. If it stays bright there is a problem with the power supply and you will need to test a few things. If the bulb dims, then you can read the voltages at the filter caps. You should get about 45 volts dc on each of the caps. Read to ground, the red wire will be positive and the green wire will be negative.

If you get that far, then the next step will be to test the two output transistors.

Report message to a moderator

[Message index]

		K100B-5 By: irish77060 on Fri, 27 January 2017 13:03
		Re: K100B-5 By: chicagobill on Fri, 27 January 2017 20:27
		Re: K100B-5 By: irish77060 on Fri, 27 January 2017 22:48
		Re: K100B-5 By: irish77060 on Mon, 30 January 2017 10:56
		Re: K100B-5 By: chicagobill on Mon, 30 January 2017 11:43
		Re: K100B-5 By: stevem on Sat, 28 January 2017 06:26
		Re: K100B-5 By: chicagobill on Sun, 29 January 2017 17:14
		Re: K100B-5 By: stevem on Mon, 30 January 2017 11:31
		Re: K100B-5 By: chicagobill on Mon, 30 January 2017 12:33
		Re: K100B-5 By: irish77060 on Mon, 30 January 2017 13:35
		Re: K100B-5 By: chicagobill on Mon, 30 January 2017 14:41
		Re: K100B-5 By: irish77060 on Wed, 01 February 2017 14:06
		Re: K100B-5 By: chicagobill on Wed, 01 February 2017 16:49
		Re: K100B-5 By: irish77060 on Thu, 02 February 2017 11:51
		Re: K100B-5 By: irish77060 on Thu, 02 February 2017 11:56
		Re: K100B-5 By: chicagobill on Thu, 02 February 2017 12:43
		Re: K100B-5 By: irish77060 on Thu, 02 February 2017 12:54
		Re: K100B-5 By: chicagobill on Thu, 02 February 2017 17:22
		Re: K100B-5 By: irish77060 on Tue, 07 February 2017 14:54
		Re: K100B-5 By: chicagobill on Tue, 07 February 2017 20:59
		Re: K100B-5 By: irish77060 on Wed, 08 February 2017 14:25
		Re: K100B-5 By: chicagobill on Wed, 08 February 2017 15:18
		Re: K100B-5 By: irish77060 on Wed, 08 February 2017 15:51
		Re: K100B-5 By: chicagobill on Wed, 08 February 2017 15:57
		Re: K100B-5 By: irish77060 on Wed, 08 February 2017 17:13
		Re: K100B-5 By: chicagobill on Wed, 08 February 2017 18:02
		Re: K100B-5 By: irish77060 on Fri, 10 February 2017 13:28
		Re: K100B-5 By: chicagobill on Fri, 10 February 2017 21:33
		Re: K100B-5 By: irish77060 on Sat, 11 February 2017 11:18
		Re: K100B-5 By: chicagobill on Sat, 11 February 2017 11:39
		Re: K100B-5 By: irish77060 on Sat, 11 February 2017 17:50
		Re: K100B-5 By: irish77060 on Sun, 12 February 2017 07:27
		Re: K100B-5 By: irish77060 on Sun, 12 February 2017 12:11
		Re: K100B-5 By: chicagobill on Sun, 12 February 2017 14:32
		Re: K100B-5 By: irish77060 on Sun, 12 February 2017 19:07
		Re: K100B-5 By: chicagobill on Sun, 12 February 2017 19:17
		Re: K100B-5 By: irish77060 on Mon, 13 February 2017 12:17
		Re: K100B-5 By: chicagobill on Mon, 13 February 2017 13:01
		Re: K100B-5 By: irish77060 on Mon, 13 February 2017 13:07
		Re: K100B-5 By: irish77060 on Mon, 13 February 2017 13:31
		Re: K100B-5 By: stevem on Mon, 13 February 2017 13:47
		Re: K100B-5 By: irish77060 on Mon, 13 February 2017 16:20
		Re: K100B-5 By: chicagobill on Mon, 13 February 2017 18:25
		Re: K100B-5 By: irish77060 on Tue, 14 February 2017 10:36
		Re: K100B-5 By: stevem on Tue, 14 February 2017 06:24
		Re: K100B-5 By: irish77060 on Tue, 14 February 2017 10:38
		Re: K100B-5 By: chicagobill on Tue, 14 February 2017 10:55
		Re: K100B-5 By: irish77060 on Tue, 14 February 2017 15:07
		Re: K100B-5 By: irish77060 on Tue, 14 February 2017 19:12
		Re: K100B-5 By: chicagobill on Wed, 15 February 2017 02:18
		Re: K100B-5 By: irish77060 on Wed, 15 February 2017 13:25

Previous Topic:	Speaker cables
Next Topic:	K200B-1 Bright switch kaput

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Mon Oct 14 03:10:07 EDT 2024