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How do you disassemble a Belkin Tunebase?

I want to remove the case from my non-working Belkin Tunebase and would like a schematic.

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How do you remove a chuck from a Skil Model 569 drill? Thanks

If there is not a screw at the bottom its most likely threaded on, they will be left handed threads. I have never removed one of those but i would open the chuck as far as it can go, find a way to lock the motor up and use a strap wrench on the chuck. hope this helps.

Jun 20, 2014 | Car Amplifiers

1 Answer

Need the type of transisters for the schematic diaphraM for the vx2200d monoblock amp

open the case and look at the transistor itself.
all transistors have unique product id numbers.

and type in the transistor number in the search box.

select quantity and order your replacement part.

May 08, 2011 | Car Amplifiers

1 Answer

I need to repair my amplifier ..but the tecnition asks me to get the schematics of this amp due to that here in BSAS..ARGENTINA THERE IS NO INFO CONCERNED TO THIS ITEM..thereso...having this info we can...

I have few schematics of Rockford Fosgate units, let me know model number of amplifier to see if its schematics exist in my stock or not.
In case schematics does not exist in my stock, you need to contact Rockford Fosgate for required schematics.
Following schematics exist in my stock:
G800A2 Punch 801S PC4333
301M PC 4309H
551S PC4340A H500A2
600A5 PC1986E
Power 300SCH
Punch 2001X
Punch 500M

Nov 24, 2010 | Rockford Fosgate Car Amplifiers

1 Answer

Intermittent shorts in a Crate Limo TX50DE Guitar

turn that ****** on and get a can of freeze spray. coming and going type issues is usually related to a failing electrolytic capacitor. there may also be a bad mosfet, rectifier, diode, etc. i would be suspect to caps. schematics probably only available thru crate and you have to pay a couple bucks, but trust me its worth the couple bucks spent and having it on its way than wasting hours online not getting anywhere. by the way i checked my sources and came up with nada.

Feb 20, 2009 | Crate SPA1600 Power Amplifier - SPA Series...

1 Answer

Amp Stopped working.

I would suggest checking the unit for cold solder joints or bad solder joints. The onlt hope after that is a bad component. You will need a schematic and multimeter to do this with. Open the unit and measuer the main rail voltage this will provide the data you need to troubleshoot the unit with the use of the schematic.

Sep 13, 2007 | Jensen PS260 Car Audio Amplifier

1 Answer

No Power

Hello jasper100, Have you opened the unit to take a look inside? Since you dont have a blown fuse we cans assue the a short has not occured. Now I would chect to see if the voltage regulator in the amp has voltage coming from it. It may not in that case you may have to remover the old regulator and put in a new one just to get to the point of properly troubleshooting this amp. I would suggest that you get a schematic for this unit and use a multimeter to look at the voltages in the power supply section and see which sections have no rail voltage (12v supply voltage). I would also advise checking the remote to for regulator failure.

Sep 10, 2007 | Legacy Audio Blue Diamond LA580 Car Audio...

1 Answer

301x amplifier

Good luck. Rockford Fosgate does not sell or release any service parts/diagrams AT ALL. They want you to buy a new one or send it in to them to be repaired at an exhorbitant price. Also, from my experience, most RF amps are unrepaairable due to their construction design. the outputs are case soldered and cannot be removed individually. Time to upgrade.

Sep 07, 2007 | Rockford Fosgate Punch 301X Car Audio...

1 Answer


It sounds like you have blown your Output amplifier MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) You will see some components with metal tabs, these are some of those along with some secondary stage pre driver transistors also screwed to the metal case (heat sink). Ok you will need some pieces of equipment. First you will need a schematic of the unit (never work without a schematic), second you will need a volt ohmeter (yes I am old) you might call it a multimeter. Now this is the bare minimum of equipment you need. first open ope the scematic and find the main voltage rails and test points, these will be important as you traces the source of your problem down. I want you to take measure ments of the test points and compare them to the measurements in the schematic, the places where the diffences are dramatic are the places the problem may be. remeber take these measurements and compare them to the schematic and then try to isolate the problem down to the components that are truly bad. Also pick up a book on how to repair audio amplifiers. This is the best I can do over the internet, happy hunting my friend.

Aug 17, 2006 | JVC KS-AX4700 Car Audio Amplifier

2 Answers

One channel not working

could possible a bad bias resister. easy enough checked with a meter for ohm. also check around the circuit one the side that gets hot see if the transisters farther in are getting hot as well of if they seem out of range on a meter. One thing I have found is if you look carefully at an amplifier stage it is pretty bisymetrical. so use measurements from one side to compare to the other. Sometimes this will give clues.

Aug 04, 2006 | Verge VGA285 Car Audio Amplifier

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