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Checks \ Steps To Do After Recapping ?

Try a 100W bulb and write what it does. It should dim almost completely out. There will still be a little glow to it but not much.
 
Not sure if this was asked before but was the unit working prior to doing this work?
Stupid question but, did you only correct the transistors that you had replaced and not the originals that you did not change?
Did you replace the relay?
 
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The unit worked fine , I just wanted to do recap
There are few transistors that I did not touch .
Everything I replaced I checked and also checked all capacitors I installed
Did not replace the relay
 
markthefixer said:
The lamp/bulb should be at least 100 watts for a spec amp, for any chance of dimming. The higher the wattage the better...

at least 40w, then 60w, but best 100w to start, possibly going up to 150w.

It obviously has to be an incandescent lamp.
Click to expand...

As Mark stated, 100W + Bulb
 
omri617 said:
The unit worked fine , I just wanted to do recap
There are few transistors that I did not touch .
Everything I replaced I checked and also checked all capacitors I installed
Did not replace the relay
Click to expand...

No Solder Bridges anywhere? A solder bridge is when the solder comes across the original solder joint and touches something it should not. Sorry, just putting suggestions out.
 
Tried it , the same
I must confess , that I also hooked the amp directly to electricity .
It did not not do anything , the same silence , no smoke no pop no pfff
Ain't it strange that fuse doesn't get any voltage from neither sides ?
 
omri617 said:
Ok , jampers done , triple checked the capacitors and diodes , checked all Pnp - Npn diodes and all gave me results more than 750
BUT
When I plug the amp to the DBT , and turn it on , the bulb Dims significaly and the amp does not make the relay click :(
Help!
Click to expand...

How did u check your transistors? Out of circuit or in? What meter setting?
Did you test them all 6 ways/
Results higher than 750? I just went and checked 10 of my KSC2383 and they were all around 0.625~0.637 vdc range.
 
omri617 said:
Tried it , the same
I must confess , that I also hooked the amp directly to electricity .
It did not not do anything , the same silence , no smoke no pop no pfff
Ain't it strange that fuse doesn't get any voltage from neither sides ?
Click to expand...

Pull the fuse and check for continuity. Are you checking for AC or DC voltage?
 
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Like this (bent the legs just to make a photo) it's one of the old ones I took out.
Pnp and Npn differ in the placement of the leads...
 

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omri617 said:
Checked , there is continuity . Fuse ok. Checked both (AC / DC) ground was taken from the amp's ground behind transformers
Click to expand...

For AC voltage check, you don't ground other lead. Touch the red lead to one side of fuse and the black lead to the other side. Have your meter on VAC and don't slip.

You should really wrap tape on those test leads leaving just a little open at the end.

That is a strange reading on your meter. Was there any beep sound?
 
Checked the way you said , nothing . 0.0
When I turn the amp on , the light in the room dims for a second - the same it did when it used to work ..
Also , got near the transformers and they have the regular noise in there... electricity noise...
at least transformers not fried..

When i checked the transistors , there was no beep sound at any situation.


I made the tests according to this :


first the PNP:
black lead to base, red lead to collector, result = 675
black lead to base, red lead to emitter, result = 688
red lead to base, black lead to collector, result = OL = No conduction
red lead to base, black lead to emitter, result = OL = No conduction
black lead to emitter, red lead to collector, result = OL = No conduction
red lead to emitter, black lead to collector, result = OL = No conduction

next the NPN:
black lead to base, red lead to collector, result = OL = No conduction
black lead to base, red lead to emitter, result = OL = No conduction
red lead to base, black lead to collector, result = 677
red lead to base, black lead to emitter, result = 680
black lead to emitter, red lead to collector, result = OL = No conduction
red lead to emitter, black lead to collector, result = OL = No conduction
 
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Connect your leads to where the amps unswitched outlet is, same way, on lead on one side and the other lead opposite and read the AC voltage

Check your DBT with a desk lamp or something else plugged into it besides the amp.
 
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Problem with DBT. Is hot lead or Neutral lead going to switch? If neutral, you might need to change the DBT around. Hot lead to the switch, then light bulb fixture, then DBT outlet. The neutral would then to go directly to DBT outlet. Not really sure that this matters though, but also, I have never delt with that type of outlet either.
 
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