need help quick!

[SPL140.2 5,000+ posts]

did you check the rcas with the dmm to see if its putting anything out

 

[Lil_KB 10+ year member]

no.

and its obviously been blown before...but i dont see any marks on the actual board. pics uploading, you'll see what i mean.

 

[Lil_KB 10+ year member]

 

[Lil_KB 10+ year member]

well, sent him a PM. it seemed like he was a cool guy, so i don't think this was an attempt at a scam...hopefully he's understanding.

 

[dinty01 10+ year member]

yea i think that amp is smoked honestly after seeing the pics. I highly doubt it has been repaired yet, good luck with the amp, youll probably have to send it to Memphis to get it fixed unless the seller will take it back. But if you send it to Memphis make sure you put your name on the heatsink, when I returned 2 of my amps they both came back with shittier headsinks, mine were nice and I got ones with corrosion inbetween the fins(older ST style amps), good luck---Dinty

 

[Lil_KB 10+ year member]

ya, im hoping he'll take it back and give me a refund or trade for one of the other mojo's he has.

 

[PowerNaudio 10+ year member]

that amp has seen better days. you can tell that the filter caps have over heated and the plastic on the top is either shrunk from heat or the cap is gone. some of the resistor going to the power transistors have heated up to the point where they have burnt the pcb. i would most defenetly return it to the seller for a full refund.

good luck bro.

 

[Lil_KB 10+ year member]

i know its kinda beating a dead horse, but how do i check the RCAs with a DMM? what kind of signal am i looking for?

just don't want to leave anything out.

 

[dinty01 10+ year member]

hmm dont know how to test that, Im sure someone on here does though

 

[PowerNaudio 10+ year member]

to check for a signal on the RCAs with a DMM. all you do is set the DMM to a/c reading and play some music or test tones. it will give you an alternating readings while playing music, and a steady value while playing testones. if playing a test tone IMO to get an accurate reading you should play a 60Hz sine wave. since thats the freq that the dmm was designed to read most acurate. but all you really need to know is if there is a voltage swing on the rca's.

 

[SPL140.2 5,000+ posts]

to check for a signal on the RCAs with a DMM. all you do is set the DMM to a/c reading and play some music or test tones. it will give you an alternating readings while playing music, and a steady value while playing testones. if playing a test tone IMO to get an accurate reading you should play a 60Hz sine wave. since thats the freq that the dmm was designed to read most acurate. but all you really need to know is if there is a voltage swing on the rca's.

x2, put one probes on the male part and put the other probe on the outside outer ring

 

[dinty01 10+ year member]

cool, definitely good to know info, thanks for the insight on that guys //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Lil_KB 10+ year member]

i get no voltage from the RCAs....

i've never used this H/U on a system before, so that might be the problem...

 

[Lil_KB 10+ year member]

ok, i put the + DMM probe on the red male probe for the RCAs, and the - DMM probe on a solid ground.

playing music it just alternated back and forth between .02 and .03 volts...does that mean i'm not getting a signal?

i've got another H/U coming to test it on...