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pot knobs on amps
Posted: Fri Jul 17, 2009 1:54 pm
by knightrider358
Ok guys before I did my install recently when I got my black ZX450 and Ti600.2 I took the covers off and cleaned the boards and all. While I had the covers off I noticed a couple of small pot knobs on the boards of each amp jus wondering what are these for exactly? Ive seen them before on allot of other amps before but never figured out what they are for. Any replays would be greatly appreciated thanx in advance
Posted: Fri Jul 17, 2009 2:16 pm
by fuzzysnuggleduck
Are you maybe talking about the bias pots?
Posted: Fri Jul 17, 2009 2:58 pm
by knightrider358
prob what do they do
Posted: Sat Jul 18, 2009 12:57 pm
by Thumper88
BCAE1.COM wrote:Many times, there is a
bias adjustment potentiometer. It allows you to set the bias/idle current of the output transistors. If the bias is set too high, the outputs will run too hot and be more likely to fail. If set too low, the output could be distorted. There have been many instances where someone has gone into an amplifier and turned the bias pot up (thinking that they were increasing the power output of the amp). This caused the amp to fail. Unless a potentiometer is accessible from the outside of the amplifier, you should not turn it unless you know what it is. Having the bias current set too high is like having the idle setting on your car's engine set to 3000 RPMs instead of 750 RPMs.
Posted: Sat Jul 18, 2009 1:19 pm
by ttocs
F-it, crank it up and see what happens....
Posted: Sat Jul 18, 2009 4:47 pm
by knightrider358
ya'll are crazy I aint touchin those unless I see fact if they are my idle controll
Posted: Sat Jul 18, 2009 5:05 pm
by Jacampb2
The two pots at the top left hand side of the board are right and left bias control. The pot at the lower middle right, just to the left of the power supply riser card, is the pot that adjusts the current regulation of the amps power supply. None of them should be adjusted unless you know what you are doing.
Later,
Jason
Posted: Sat Jul 18, 2009 5:22 pm
by knightrider358
thanx jason
Posted: Sat Jul 18, 2009 5:29 pm
by ttocs
I know what I am doing, my dad is a tv repairman with a rightchus set of tools, I can fix it........
Posted: Sun Jul 19, 2009 3:28 am
by Jacampb2
ttocs wrote:I know what I am doing, my dad is a tv repairman with a rightchus set of tools, I can fix it........
Did you take it off some sweet jumps?
