Question about Diamond Audio D5-1200.1 Car Audio Amplifier

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Diamond Audio D5 1200.1 wont power up

I received a Diamond Audio board, D5 1200.1 board. It was missing some surface mount transistors, and might be missing some other parts, I am not sure. I have compared pics of my board to other working boards and it looks the same. When the fuses are removed, there is 13.8 volts throughout the board, but when the fuses are reinserted, the voltage drops to 0.55 or so and there is a buzz from the baord. The protect lights do not come on either. I need a good pic of the board, or some help on where to start troubleshooting. Heard of this before???

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Re: Diamond Audio D5 1200.1 wont power up

You have a dead short on the board If your missing parts I myself would not bother to fix but if your up to a callenge contact they can assist you in getting the parts and diagrams for you

Posted on Mar 31, 2006

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I have a Kicker KX-200.2 amplifier and need to know what transistors belong in the Q-15 and Q-18 locations on the main circuit board.

I have a 450.2 amp and Q15 has a tip42c transistor, and Q18 is missing from my amp (the reason I have the internals exposed..), but I'm fairly confident that it's a irfz44v mosfet chip. Hope that helps.

Oct 18, 2012 | Kicker KX1200.1 Car Audio Amplifier

1 Answer

R40 piece is missing is that a problem

Hello crzykd129,

If a piece of a resistor has broken off, it's value has changed which affects other things in the circuit. It needs to be replaced with a new component to restore proper operation. The remaining portion is being severly overburdened everytime you power it on and it's just a matter of time until it causes some other part to fail.

Resistors are generic so try locating it by resistance value (indicated by the color coded bands), and wattage and replace it. Here's a source for all types of electronic components.

Hope this helps.

Aug 08, 2009 | Legacy Audio Blue Diamond LA1480 Car Audio...

1 Answer

In the diamond audio d6 1500.1 there is a crossover board whit two 16 pin chips in it and they scratch the part number off the the chips i need to find the part nmbers for those chip

Do you know the orientation of the board? A friend of mine pulled it off and it will fit on either way, but I'm not sure wich direction is correct. could you help me

Jul 05, 2009 | Car Amplifiers

1 Answer

Output transistor is out in car amp

Hello nymnym999,

You did not specify which Fusion amp you have but if the insides looks like the Fusion PP-AM60020 image below, you'll have to "desolder" the transistor.

First remove the heat sink from the transistor case. You'll need a controlled heat soldering station, a desoldering vacuum tool commonly referred to as a "solder ******", and some desoldering braid. Be careful with the heat around other components.

After removing the transistor, use the desoldering braid to clean off any remaining solder from around and in the circuit board mounting holes. Position the new transistor and solder it to the board. Put a thin film of thermal compound on the heat sink and remount it to the new transistor. Use just enough of the compound to insure an air-free join between the transistor case and the heat sink. Reassemble the case and you're finished.

Hope this helps.

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1 Answer

Amp sucks sub in

The amp probably has shorted output transistors. The damage may include several surface mount components also. The output transistors are soldered to the mehsa insulator and are more difficult to change than those in other amplifiers. If you want to learn to do repairs, it may be worth the cost and effort to try to repair it. The parts are relatively inexpensive (average less than $15 - not including shipping). The tools to repair it are going to cost ~$35-50.

If you simply want the amp repaired, take it to a local repair shop.

Apr 14, 2008 | Rockford Fosgate Punch 301S Car Audio...

1 Answer

My bx2200 cut off as soon as it was turned on and started smoking?

It sounds like the power supply transistors have failed. You'll need to pull the clamps and get the numbers off of the transistors. It's also possible that the 47 ohm gate resistors have failed. After removing the old transistors, you need to check the resistors individually.

Since you're new to repair work, read the following page.

Basic Repair Introduction

Post the part numbers if they are incomplete and you can't find the correct replacements. is probably the best place to buy small quantities if you're in the US.

You also need to check the output transistors to see if any are shorted. If they are, the repair will be more difficult (especially if there is damage to the driver board).

Feb 15, 2008 | Hifonics Brutus BX 1605D Car Audio...

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Legacy amp in protect mode

What was the part number on the transistor you replaced?

Dec 14, 2007 | Legacy Audio Blue Diamond LA1880 Car Audio...

2 Answers

Can i fix it ?

If no one else offers any suggestions, remove the transistor. Set your multimeter to ohms. If the solder pad for the left-most leg of the transistor goes to the B+ terminal of the amp (possibly via a low value resistor) and the center leg goes to pins 8, 11 and/or 12 of the tl494/tl594, the transistor is likely a 2sb631 or a 2sb649. The transistor is used to switch power to the tlx94.

If there were more than 2 of the IRFZ44 transistors (the ones most commonly used by kicker) in the supply, you need to change all of them. It's very rare that any survive. When one goes, they all go.

Did you check the audio transistors to see if any had failed?

Dec 14, 2007 | Kicker 04KX250.2 Car Audio Amplifier

1 Answer

Diamond Audio Amp 1200.1 D5 Blows Fuses When Connected to Power!

if there was a misconnection polarity, you coud check fo shorted diode at power entrance circuit.

May 16, 2007 | Diamond Audio D5-1200.1 Car Audio...

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