Search found 923 matches
- Fri Sep 30, 2016 3:03 pm
- Forum: Car Audio
- Topic: Phoenix Gold xs4600 repair help
- Replies: 21
- Views: 12893
Re: Phoenix Gold xs4600 repair help
If you are testing the amplifier outside the heat sink then that will cause any device that is/was attached to the sink to fail.
- Fri Sep 30, 2016 3:02 pm
- Forum: Car Audio
- Topic: Mps2500 burnt resistor
- Replies: 8
- Views: 5197
Re: Mps2500 burnt resistor
Well one amplifier is 500watts (the mps2500) and the other is 1200watts, so of course you'll notice a difference in output. How do you know the resistor is burnt? Did you ohm it with a meter? Replacing a resistor is as easy as replacing a capacitor, so if you can do one you can do the other. I under...
- Thu Sep 29, 2016 2:40 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
You might as well then remove all the mosfets, and test the bridge rectifier diodes (two devices attached to the sink, next to the fets). If the rectifier diodes are shorted then those devices will have to be replaced as well as the mosfets and perhaps the protection diode.
- Thu Sep 29, 2016 4:49 am
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
If D9 has current flow both ways (test leads flipped) then it's bad.
By same two pins you are talking about the middle pin and the one on the right (3rd pin)?
Also did you check the diode that was near the transformer?
By same two pins you are talking about the middle pin and the one on the right (3rd pin)?
Also did you check the diode that was near the transformer?
- Tue Sep 27, 2016 5:15 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
Yes check the fets for shorts, if one of them has a short on all between all three pins then go ahead and remove it and retest the remaining fets. There is also a large diode that is in parallel to the B+ and ground right near the transformer, remove from circuit and test as well to see if current f...
- Tue Sep 27, 2016 5:10 pm
- Forum: Car Audio
- Topic: Phoenix Gold xs4600 repair help
- Replies: 21
- Views: 12893
Re: Phoenix Gold xs4600 repair help
28v on the primary or secondary caps? If measuring the rails (secondary) voltage then I go right to the center pin of the rectifiers. You should have same positive and negative voltage on the rails when using secondary ground as a reference point. Can you be a bit more specific as far as which two c...
- Tue Sep 27, 2016 6:16 am
- Forum: Car Audio
- Topic: Phoenix Gold xs4600 repair help
- Replies: 21
- Views: 12893
Re: Phoenix Gold xs4600 repair help
Okay that's a clear indicator that there is an issue in the xover circuit, next is to see if the noise is there only in the LP or HP or both. There are several components (op amps and resistors) that make up the xover filters, having a bench scope will help find what component is causing the squeal.
- Mon Sep 26, 2016 11:49 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
You may have a bit of a hard time removing the devices that are attached to the heat sink, use the largest allen key you can fit in the device's screw/mounting hole and slowly pry the allen key towards the center of the board (downward). Just enough to separate the device from the sink, don't bend i...
- Mon Sep 26, 2016 11:42 pm
- Forum: Car Audio
- Topic: Phoenix Gold xs4600 repair help
- Replies: 21
- Views: 12893
Re: Phoenix Gold xs4600 repair help
There could be an issue with the xover-preamp board, is the squealing noise coming from one channel (bad channel?) or all channels? Does the noise increase if xover is bypassed?
Also what channel is shorted/bad?
Also what channel is shorted/bad?
- Mon Sep 26, 2016 4:44 pm
- Forum: Car Audio
- Topic: Phoenix Gold xs4600 repair help
- Replies: 21
- Views: 12893
Re: Phoenix Gold xs4600 repair help
Best bet is to replace all the diodes and transistors as well as the two main outptut mosfets in that channel. You'll spend about 5-6 bucks in all the components needed in one channel and will pretty much guarantee a successful repair. Here's a link to the LPL44 info. http://download.phoenixphorum.c...
- Mon Sep 26, 2016 3:04 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
Remove the board completely then check them again, perhaps there was a short between the chassis and device. If Q9 is still showing a short then remove it completely and check out the remaining 3 (there's a chance you'll have more than one shorted fet, best to replace all four). Once removed from th...
- Mon Sep 26, 2016 9:13 am
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
Check the middle pin of the fets in the power supply with one of the test leads on the chassis ground. Is there any shorts or low resistance between them? Perhaps of one of the silpads got damage and the fella who recapped it just didn't know or bother.
- Mon Sep 26, 2016 12:33 am
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
D8-D9 are the part of the bridge rectifier (these rarely fail), the fets Q7-10 should not have any shorts between the middle pin and either outer leg/pins. Are you checking it with the dmm set to ohm or diode mode?
- Fri Sep 23, 2016 8:21 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
Right now you are not looking for voltage you are looking for shorts (dead shorts) between the pins of each device, no power applied to the amplifier. I asked about the fuse because I don't know if you have a current meter/clamp and wanted to know if there was excessive current draw upon trying to p...
- Fri Sep 23, 2016 8:11 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
Check the fets and fet gate resistors in the power supply, check for any shorted output devices (mounted on the heat sink).
- Fri Sep 23, 2016 6:56 pm
- Forum: Car Audio
- Topic: ms2240 cap info
- Replies: 35
- Views: 18968
Re: ms2240 cap info
It's already recapped, the rails are original but are not 16v are 25v. I saw this amp as soon as it was posted a week ago for 140.00 and offered the seller 120.00 for it and he never did replied (so kinda bummed out that he ended up listening for 120.00 without any notice lol, oh well). I can say th...
Re: ZPA0.3
Doubt it...because that's one of gold plexi screw they left on the amp...the one right on the switch.ttocs wrote:yup so as he said if you got it non-working there is a good chance if you power it up and hold that switch it will work. as long as the caps don't explode.....
Re: strapping
Those sockets on MS series amps are so the power supply PWM controllers can all switch at the same time. One amp becomes the master, and the others all use the masters clock signal. This is to help with AM radio reception (which was a concern back in the day). It has absolutely nothing to do with t...
Re: strapping
Nope...it was not for strapping amps together for more power just to sync the switching power supplies (by allowing one amplifier's PWM to run all amps that are strapped together).
- Sat Sep 17, 2016 5:01 pm
- Forum: Car Audio
- Topic: Tantrum amp repairs
- Replies: 5
- Views: 4375
Re: Tantrum amp repairs
If you could get the datasheet for the tripath that would help out tremendously as they usually always have a diagram of the internal components.
- Sat Sep 17, 2016 4:59 pm
- Forum: Car Audio
- Topic: PG MS2250 inline fuse for power
- Replies: 5
- Views: 4579
Re: PG MS2250 inline fuse for paower
Then a 60-80amp should be plenty.
- Fri Sep 16, 2016 4:43 pm
- Forum: Car Audio
- Topic: Tantrum amp repairs
- Replies: 5
- Views: 4375
Re: Tantrum amp repairs
And that is why am hesitant to take any boards by themselves for repair. I just don't know how careful or tedious the owner will be when assembling them, not to mention I had a board come in for repair and turned out they used two TO220 insulators for the large Toshiba outputs with tiny areas of the...
- Sun Sep 11, 2016 1:32 pm
- Forum: Car Audio
- Topic: Attempting repair on a burned SA3.0X
- Replies: 27
- Views: 18001
Re: Attempting repair on a burned SA3.0X
Am curious to what predrivers you used, I have a few NOS in stock but would be nice to know for a suitable sub.
- Fri Sep 09, 2016 2:32 pm
- Forum: Buyer & Seller Ratings
- Topic: jeffg
- Replies: 2
- Views: 10444
Re: jeffg
Same here, great packaging skills. Great communication, great seller. Thanks.
- Thu Sep 08, 2016 8:37 pm
- Forum: Car Audio
- Topic: Subwoofer box size have any noticeable effect on cabin gain?
- Replies: 8
- Views: 6591
Re: Subwoofer box size have any noticeable effect on cabin g
Now now, you may hear a difference if you fill up your small SUV with a ton worth of sand bags. lol.