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| | |-+  My JTM45 power indicator is not working		 « previous next »
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Author Topic: My JTM45 power indicator is not working  (Read 7164 times)
yagoo nana
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« on: December 09, 2008, 03:58:50 AM »
My JTM45 power indicator is no longer working.  It is labled 6V, and looks like it has an LED in the housing.

Can I change the "bulb" on these?
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dvidf556
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« Reply #1 on: December 11, 2008, 01:34:05 AM »
yes, I had the same probem on my plexi.  Nik sent me some replacements and I actually changed it out tonight.  the issue is that these indicators dont like and can't take a power surge.  Nik wrote that he is investigating another design that will not have this issue. 

simple enough to change out, drain the filter caps first.   
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yagoo nana
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« Reply #2 on: December 11, 2008, 05:50:40 AM »
I had read a few people had the indicators fail, but didn't realise this was the cause.  I wonder if it can easily be surge protected (by the simple addition of a cap, or something similar).
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M Fowler
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« Reply #3 on: January 01, 2009, 06:41:40 AM »
Use a 120V lamp wired to the bottom of the power switch with a MOV 130v across the pins for spike protection.  Otherwise have a bunch of bulbs handy.
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yagoo nana
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« Reply #4 on: January 01, 2009, 07:38:02 AM »
Sorry to be dumb, but what is a MOV?
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Evo
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« Reply #5 on: April 28, 2009, 10:18:39 PM »
Quote from: dvidf556 on December 11, 2008, 01:34:05 AM
yes, I had the same probem on my plexi.  Nik sent me some replacements and I actually changed it out tonight.  the issue is that these indicators dont like and can't take a power surge.  Nik wrote that he is investigating another design that will not have this issue. 

simple enough to change out, drain the filter caps first.   

What did the replacements exist of? Another led or a bulb?

I'm still building the amp, What whould be the correct way to install the LED? In parralel with the heater (if that's true Sad no wonder it breaks ) Huh?
« Last Edit: April 28, 2009, 10:26:51 PM by Evo » Logged
Evo
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« Reply #6 on: April 28, 2009, 11:34:12 PM »
Putting a 6V zener diode in parallel with the led light could be the solution
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Evo
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« Reply #7 on: May 14, 2009, 11:20:39 AM »
I ripped out the LED. And put in a 8V bulb.
Works!
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