amp repair guys, eric, cecil

brenzbmr@sb · Post by **brenzbmr@sb** » Sun Feb 17, 2008 7:50 pm

well i was beating the crap out of my elite 12d on my 2125.

it plays pretty good.

i turned off the car and washed it. went cruising after that and while it played it turned off.

i wasnt playing it hard because my son was in the car,

anyway i get home and the ovr lite is on.

i checked for any burns on board none. fuses are good.

but i didnt check any tranistors or things like that

well i guess i need some pointers on fixing it or finding out what the hell happended to it..

i was running the elite parallel to the amp but i never had problems in the past.

aloha.

1moreamp · Post by **1moreamp** » Sun Feb 17, 2008 8:20 pm

Check Q122 and Q123 in the left channel and then check Q222 and Q223 in the right channel. These are the overload indicator transistors they may have failed..

You were bumping the amp and the drive level went out the windows with the sound

I have seen these fail before, but these may only be a symptom of the failure.

Take a look see if the led clip indicators are on foe either channel if they are I just replace the two transistors in each channel and retest.

I tell you about this because I have seen it several times before, and it cost less than a dollar to fix. If its still there after this I would say you may have stretched something a bit too far and it will have to benched to bring her back....C

brenzbmr@sb · Post by **brenzbmr@sb** » Mon Feb 18, 2008 12:07 am

its nice that everything is labled but damn i cant find them...

brenzbmr@sb · Post by **brenzbmr@sb** » Mon Feb 18, 2008 12:09 am

this is worse then finding waldo..........

i can find that four eyed little dood anytime...

brenzbmr@sb · Post by **brenzbmr@sb** » Mon Feb 18, 2008 12:13 am

found q223 and q222

hell yeah i found them all
now how do i test them?

what am i looking for?

thanks

arent these transistors?

i can honeslty say i was running the amp about 1.3 ohms bridged
pretty hard for burst....

but it was fine untill later when i turned it back on after sitting for an 20 minutes.

hmmmmmmmm

seandiguer · Post by **seandiguer** » Mon Feb 18, 2008 8:15 am

Umm.. did you unhook the sub from the amp and it still goes into overload? i use to have a 15" xs sub and my zx350 would go into protect like once a week and could never figure out why, and it ended up being my sub.

1moreamp · Post by **1moreamp** » Mon Feb 18, 2008 10:40 am

brenzbmr@sb without the sub and rcas connected , does you peak clip lights come on whne the amp is turned on ??? < this is very important

IF not then leave these transistors alone, if so them replave both of them in the channels the leds come on in. It should cost you less than 5 noting your location the island.

If the leds are not lite them its something else...LMK...cec

brenzbmr@sb · Post by **brenzbmr@sb** » Mon Feb 18, 2008 5:36 pm

the subs and rca are unplugged and the lite dont lite up.

just the ovr.

but ill check one more time

1moreamp · Post by **1moreamp** » Mon Feb 18, 2008 5:50 pm

The overload is the red led right, but not the clip leds.... hummm let me see.. OK I have checked my crib notes and you have issues and Q111 and Q211 is the signal transistor that has is stopping the transistors that accept the signal from the 510 ohm resistors in each channel that link back to the Bias circuitry.. You should start looking for open resistors and the two transistors are the clue to the bad channel to look into.

Look at this point I would say if you not used to this it time to consider where you draw YOUR line at working on these... just thinking in your best interests.
as the rest of this gets deeper and deeper. I would start ohming out all the ceramic resistors in each channel they look either green of grey bodied and have colors just like any other resistor, 1/4 watt size < small as the others> there are several of these and the are PGs secret protection, and I think you need one or more of these and possibly a driver or two, possibly a output transistor also..

If you want to go deeper lets go PM and e-mail on this as it will get way out of hand with posting, plus I gotta run fix a computer this evening < right now> I'll be back later though...C