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Search: Posts Made By: moss99
Forum: Troubleshooting Power Supplies and Power Supply Design 11-02-2017, 02:30 PM
Replies: 1
Views: 329
Posted By moss99
Re: CIT 700 w EN60950

not sure if this helps , its the voltages at the ic pins .
165555
Forum: Troubleshooting Power Supplies and Power Supply Design 11-01-2017, 08:55 AM
Replies: 1
Views: 329
Posted By moss99
CIT 700 w EN60950 +5 vsb only

Hi , i have been trying to fix the above atx psu ,I think it got quite hot , there was a LOT of dust inside the case and i the fan was not turning freely so may be was stopped .
There were some...
Forum: Troubleshooting Audio Equipment 03-08-2017, 01:44 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Hi guys , im about ready to give up on this , i thought i had found something , i noticed when i moved this coil the led would flicker green/ red , i took the capacitor out next to it ,(circled in...
Forum: Troubleshooting Audio Equipment 03-05-2017, 06:29 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Unfortunately apex have said the could not get the driver to this board , typical they have schematics for the good boards ,,
Forum: Troubleshooting Audio Equipment 03-05-2017, 03:27 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

152938

These readings are with the relay removed , its an earlier photo .

On pin 1 (with the ground probe on center pin of J6) .3 v dc , on pin 2: -12 vdc .
with red probe on pin 1...
Forum: Troubleshooting Audio Equipment 03-04-2017, 07:41 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

152846

This pad on the top side of the board goes to ground .
Forum: Troubleshooting Audio Equipment 03-03-2017, 01:37 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

yes i have dc voltage on both speaker leads , it started at 5 vdc and is slowly climbing it got to 7.5 and i powered off , led is green .
Forum: Troubleshooting Audio Equipment 03-03-2017, 01:06 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Here is a photo of under the relay ( top side of board) should any of these pads be connected ?
152803
Forum: Troubleshooting Audio Equipment 03-01-2017, 12:51 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

preamp top bottom pics .

152645

152646
Forum: Troubleshooting Audio Equipment 03-01-2017, 12:40 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Hi , yes i replaced the relay with a new one , the top of the board does have a pad for each pin but i dont see how they could have been soldered at the top , under the relay . Or how i could solder...
Forum: Troubleshooting Audio Equipment 02-28-2017, 01:32 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

im not sure which the preamp is , if you look at my first post , 1st pic i thought is the power output board , 2nd photo is power input , is preamp the board in the last photo ? thats the board with...
Forum: Troubleshooting Audio Equipment 02-26-2017, 02:56 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

1, not working with audio source , i have an svs cylinder sub set up and working on my main system , playing a set up test tone so i know there is definitely output form the source ,, no sound .
2 ,...
Forum: Troubleshooting Audio Equipment 02-25-2017, 10:10 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Hi , yes the power switch to on , led is green , switch to auto , led turns red , i have not tried it with the 12 volt trigger , ( i dont have a suitable lead handy ),
I did touch up a couple of...
Forum: Troubleshooting Audio Equipment 02-25-2017, 08:03 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Bit of an update , i was looking at the pins of the mosfets i removed for testing and noticed they were not all that clean , (flux residue and gunk) , so i gave them a good clean up and now i have a...
Forum: Troubleshooting Audio Equipment 02-19-2017, 06:06 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

the lower pin on the relay in the photo is earth , and there is 12 v on one side of Q17 , so should 12 v be going across Q17
Forum: Troubleshooting Audio Equipment 02-19-2017, 06:03 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

I took out the relay and it tested a bit differently across the pins with ohm meter so i swapped it with the new one still the same , the old relay i found clicks when i put 12 volts across pins...
Forum: Troubleshooting Audio Equipment 02-18-2017, 02:38 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

I have noticed a slight buzzing / frying sound in the area shown in this pic , i cant really pinpoint it though . is that normal ?

152003
Forum: Troubleshooting Audio Equipment 02-17-2017, 03:00 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

the negative pin of C42 (see pic)

151967
Forum: Troubleshooting Audio Equipment 02-17-2017, 02:30 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

power board top / bottom

151953

151955
Forum: Troubleshooting Audio Equipment 02-17-2017, 02:25 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

these are the relay volts , the speaker cables are soldered in , see photo .

151950
Forum: Troubleshooting Audio Equipment 02-17-2017, 01:07 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

These are the voltages on CN3A not sure which is 1 ..
Im using the - pin of the large capacitor on the output board for the negative probe on my meter , is that ok ?

151938
Forum: Troubleshooting Audio Equipment 02-17-2017, 11:48 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Hi , this is the reply i got from them regarding the rest of the schematics " Unfortunately we don’t. Everything I sent you before is all we have. Some of the suppliers we used to use for our amps...
Forum: Troubleshooting Audio Equipment 02-16-2017, 01:28 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Hi , i have taken this cap out (circled in red ,in photo) and have an ESR reading of 0 , its a 1000 uf 25 v

151879
Forum: Troubleshooting Audio Equipment 02-14-2017, 12:21 PM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

Ok , a bit strange , i was just looking at the voltages again and heard the relay click and the led turned green , i also noticed the transistors on the power board are getting quite hot so i powered...
Forum: Troubleshooting Audio Equipment 02-14-2017, 07:21 AM
Replies: 68
Views: 3,128
Posted By moss99
Re: powered sub wont come out of standby

No I took these out to test them
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