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hoanglucky

Member Since 24 Jul 2013
Offline Last Active Feb 01 2014 04:11 AM
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Posts I've Made

In Topic: Problem with turn off transient

28 January 2014 - 08:11 PM

Hi Joust!
It's always pop on 2 channel and very large when I turn it off. I think turn on delay ok, about 6 s, it 's pop very low when relay is operate,  I think the problem relate to capacitor, I changed 2 big capacitor of good amp to old amp but it's still there. Did you seen the similar amp?

In Topic: macrotech 1200 amp

01 August 2013 - 11:30 AM

Hi!
you may check R103, after that you can change C140, C141, C105, C106.

In Topic: Crown 5000VZ help!

01 August 2013 - 09:26 AM

Thank for your support!
2 modules is the same, if I remove 2 resistor 8.2 ohm, 22ohm, Vcc is balance, Vcc is about +/-35V. when I sold 2 resistor again, it burt again, When I install 4 transistors output( 2 for low side, 2 for high side), sometime it start ok, sometime it start failure, DId you  ever checked Vbe of driver transistors when you didn't install output transistor? I think if the circuit is normal, two resistors isn't burnt! are'nt you?

In Topic: macrotech 1200 amp

25 July 2013 - 09:07 AM

There is secondary winding, the primary is power supply. It's about 17V AC and regulate to 15VDC.