Visonik Help

lancer1978 · 1st July 2007, 07:51 AM

HI there guys and gals(if applicable)
I have a Visonik V900HC that I aquired, and recenetly the power supply has called it quits along with 16 Transistors(sanken 2SC3856) I am wondering if anyone can forward me to a either a place that can replicate a power supply(transformer) or how to rewind my own(I have tons of patience and time). I am a fairly newb newb, however am not afraid to get my hands dirty! Any help would be greatly appreciated! Thanks in advance and if theres anything I can post (pics, info etc) to make it easier Please just say the word!
http://ampguts.realmofexcursion.com/Visonik_V900HC/

audiobahnkid592 · 1st July 2007, 02:35 PM

to rewind it just make you you note the direction of the winds, gauge of the wire, and the number of wraps or lenth..what ever is easier for you. then just duplicate it.

lancer1978 · 1st July 2007, 04:10 PM

^^is it really just that easy? I know a freind of mine told me to do the same thing! Just keep track of everything, including the twists of the wire etc.

audiobahnkid592 · 1st July 2007, 04:15 PM

yes very easy. Im a newb (17 years old) and was able to fix a class d amp shown here under Audiobahn A18001Dt amp Help. If you want pics of my completed coil LMK.

lancer1978 · 1st July 2007, 09:56 PM

Thanks, I looked over your thread, doesn't seem to bad1

Perry Babin · 1st July 2007, 11:09 PM

Why do you believe the transformer is defective?

Rewinding should be be done ONLY if you can confirm that the windings are shorted and the short can not be removed.

lancer1978 · 2nd July 2007, 03:38 AM

I was told from a REpair place that the power supply and 16fets are done for, I rechecked the fets they are gone, but the power supply I would need to take them off the board to actually check them correct? What else would it be

Perry Babin · 2nd July 2007, 04:30 AM

What are you referring to when you say 'power supply'?

lancer1978 · 2nd July 2007, 05:25 AM

SEe thats where im lost, he wouldn't get specific and I was hoping to learn how to test more so before anything gets to far in, anyone care to show me a common problem (pic is easiest) and a way to test it?

Perry Babin · 2nd July 2007, 05:46 AM

In most amplifiers, the power supply is comprised of 40 or more components including resistors, transistors, transformers, inductors, capacitors... There is never an instance where all components are defective unless it's burned to a crisp in a fire or passed through a chipper/shredder.

Generally, when a power supply fails, the FETs fail. Sometimes the failed FETs destroy the driver resistors (connected to the first leg of the FETs) and the driver transistors.

Failure of the transformers is rare but it happens. Failure is generally due to shorted windings (sometimes intermittently shorted which can make troubleshooting difficult).

Since your amp had shorted output transistors, it's likely that the transformer is fine (unless you see enamel flaking off of it). The high current draw by the audio section likely destroyed the FETs in the power supply.

If you want to know more about the various parts of an amplifier, read through the amplifier page of my car audio site. Click the various parts of the amplifier (green board) and it will bring you to the respective pages that will provicde more details.
http://www.bcae1.com/amplfier.htm

1st July 2007, 07:51 AM	#1
lancer1978 diyAudio Member Join Date: Jul 2007	Visonik Help HI there guys and gals(if applicable) I have a Visonik V900HC that I aquired, and recenetly the power supply has called it quits along with 16 Transistors(sanken 2SC3856) I am wondering if anyone can forward me to a either a place that can replicate a power supply(transformer) or how to rewind my own(I have tons of patience and time). I am a fairly newb newb, however am not afraid to get my hands dirty! Any help would be greatly appreciated! Thanks in advance and if theres anything I can post (pics, info etc) to make it easier Please just say the word! http://ampguts.realmofexcursion.com/Visonik_V900HC/ __________________ Your never famous til your dead`

1st July 2007, 04:10 PM	#3
lancer1978 diyAudio Member Join Date: Jul 2007	^^is it really just that easy? I know a freind of mine told me to do the same thing! Just keep track of everything, including the twists of the wire etc. __________________ Your never famous til your dead`

1st July 2007, 09:56 PM	#5
lancer1978 diyAudio Member Join Date: Jul 2007	Thanks, I looked over your thread, doesn't seem to bad1 __________________ Your never famous til your dead`

1st July 2007, 11:09 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Why do you believe the transformer is defective? Rewinding should be be done ONLY if you can confirm that the windings are shorted and the short can not be removed. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

2nd July 2007, 03:38 AM	#7
lancer1978 diyAudio Member Join Date: Jul 2007	I was told from a REpair place that the power supply and 16fets are done for, I rechecked the fets they are gone, but the power supply I would need to take them off the board to actually check them correct? What else would it be __________________ Your never famous til your dead`


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1st July 2007, 02:35 PM	#2
audiobahnkid592 diyAudio Member Join Date: Mar 2007	to rewind it just make you you note the direction of the winds, gauge of the wire, and the number of wraps or lenth..what ever is easier for you. then just duplicate it.

1st July 2007, 04:15 PM	#4
audiobahnkid592 diyAudio Member Join Date: Mar 2007	yes very easy. Im a newb (17 years old) and was able to fix a class d amp shown here under Audiobahn A18001Dt amp Help. If you want pics of my completed coil LMK.

2nd July 2007, 04:30 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What are you referring to when you say 'power supply'? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

2nd July 2007, 05:25 AM	#9
lancer1978 diyAudio Member Join Date: Jul 2007	SEe thats where im lost, he wouldn't get specific and I was hoping to learn how to test more so before anything gets to far in, anyone care to show me a common problem (pic is easiest) and a way to test it? __________________ Your never famous til your dead`

2nd July 2007, 05:46 AM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	In most amplifiers, the power supply is comprised of 40 or more components including resistors, transistors, transformers, inductors, capacitors... There is never an instance where all components are defective unless it's burned to a crisp in a fire or passed through a chipper/shredder. Generally, when a power supply fails, the FETs fail. Sometimes the failed FETs destroy the driver resistors (connected to the first leg of the FETs) and the driver transistors. Failure of the transformers is rare but it happens. Failure is generally due to shorted windings (sometimes intermittently shorted which can make troubleshooting difficult). Since your amp had shorted output transistors, it's likely that the transformer is fine (unless you see enamel flaking off of it). The high current draw by the audio section likely destroyed the FETs in the power supply. If you want to know more about the various parts of an amplifier, read through the amplifier page of my car audio site. Click the various parts of the amplifier (green board) and it will bring you to the respective pages that will provicde more details. http://www.bcae1.com/amplfier.htm __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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