Re: Re: KC not working
Did you get about 5.6V at the output of the TL431?
Anyway without proper +/-5V supplies the clock will never work.
Observe the orientation of the TL431 and the BC550.
atenolol50 said:
i tapped the digital supply from the cdp, obtained +/-11v at C813 and C814.
i got -5v at the output of BC560. however at the output of BC550C i get a -0.8v
is my 550 fried?
Did you get about 5.6V at the output of the TL431?
Anyway without proper +/-5V supplies the clock will never work.
Observe the orientation of the TL431 and the BC550.
i get a -0.4v at the output of TL431.
i changed both the BC550 and TL431. same results. -0.8v at the output of BC550.
when testing the module, i did not connect the pcb output to the cdp, could that be the cause of the wrong voltages?
the pcb gnd goes to the cdp gnd though.
the version-6 that i'm building has optional components, namely the diodes 1N4004 and 12000uF caps.
i inserted the diodes but left out the caps. is that ok?
i removed the diode across BC550 and tested. same results.
i changed both the BC550 and TL431. same results. -0.8v at the output of BC550.
when testing the module, i did not connect the pcb output to the cdp, could that be the cause of the wrong voltages?
the pcb gnd goes to the cdp gnd though.
the version-6 that i'm building has optional components, namely the diodes 1N4004 and 12000uF caps.
i inserted the diodes but left out the caps. is that ok?
i removed the diode across BC550 and tested. same results.
Still Problems
atenolo50,
Remove the comparator from the PCB and repair the +5V regulator. Only when you have +5V output reinstall the comparator.
The problem you have is not due to the diodes or the 12000µF caps.
Check for solder splashes, shortcircuits and orientation of the parts.
Clean the solder side of the PCB with an old toothbrush and some solvent like acetone, isopropylalcohol.
Check if you have +11V at the input of the regulator that is at the collector of the BC550C.
atenolol50 said:
atenolo50,
Remove the comparator from the PCB and repair the +5V regulator. Only when you have +5V output reinstall the comparator.
The problem you have is not due to the diodes or the 12000µF caps.
Check for solder splashes, shortcircuits and orientation of the parts.
Clean the solder side of the PCB with an old toothbrush and some solvent like acetone, isopropylalcohol.
Check if you have +11V at the input of the regulator that is at the collector of the BC550C.
its fixed
problem's due to the BC550 i used. it was marked 550 but was a PNP instead of NPN.
replaced it with the correct BC550C and tada ....
must thank ganck for pointing out the wrong component.
i've gone thru 2 CDs now.
my untrained ears can't tell the difference between stock and kwak clock mod, but i don't care ... its working!!
thanks everyone.
problem's due to the BC550 i used. it was marked 550 but was a PNP instead of NPN.
replaced it with the correct BC550C and tada ....
must thank ganck for pointing out the wrong component.
i've gone thru 2 CDs now.
my untrained ears can't tell the difference between stock and kwak clock mod, but i don't care ... its working!!
thanks everyone.
That's great. Who is ganck?atenolol50 said:its fixed
problem's due to the BC550 i used. it was marked 550 but was a PNP instead of NPN.
replaced it with the correct BC550C and tada ....
must thank ganck for pointing out the wrong component.
i've gone thru 2 CDs now.
my untrained ears can't tell the difference between stock and kwak clock mod, but i don't care ... its working!!
thanks everyone.
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