Hifonix BRZ1200.1D issue

mbates14

Member
2002-06-02 2:14 am
non
This one has a weird issue that I cant pin down.

It works, but it has really low volume. I have to turn the gain all the way up before it begins to beat the subs. Then when I do this, it starts clipping only at certain frequencies, and when this occures it starts cooking the sub, B+ rails drop during clipping.

Idle no clipping I have +/-65V rails. they sag to about 30v when clipping. And its burning the sub when it clips.
 
Last edited:

mbates14

Member
2002-06-02 2:14 am
non
Quick measurements gave me this:

100Hz Sinewave tone into RCAs. 0.4VAC input on RCAs.

R201 couples the pre-amp/crossover stage to the Class D driver board. the Driver board side with gain turned all the way up is 0.8VAC.

Pre-amp side of resistor is about 6.5VAC. Resistor measures fine.

is this normal? or is the class D driver bad. Both 8 pin SOIC-W ICs are scratched off. Both get really hot.

any ideas?
 

Perry Babin

Member
Paid Member
2003-11-20 11:01 am
Louisiana
www.bcae1.com
See attached.
 

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