Question about Zapco Reference 750 Car Audio Amplifier

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I have a 750.2 zapco amp the two resistors for the speaker wires got heated up bad need help to figure out what is the purpose of them and can i find them

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1 Answer

How do i reset kicker kx 850.2 from protect mode ?


If it goes into protect and your speakers and wires are good, chances are you have bad output transistors that will need to be replaces.

May 12, 2014 | Zapco Reference 750 Car Audio Amplifier

1 Answer

I installed a 400 watt zapco competition amp\ front speakers play ...back woofers don't?


are you sure you didnt wire the amplifier the front and rear to
left/ right?

check your deck settings to see that the rear speaker rca are connected.
check all wires are connected.
push the mono or bridge buttons are off.

provide more info.

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I need a manual for a zapco PEQ 9 band (old school) equalizer. can you help me?


i got a wiring paper that comes with the peq plug,its not a manual but it shows how to wire up a zapco peq

Nov 07, 2010 | Zapco Car Audio & Video

1 Answer

I have a zapco refrence 750.2 has no sound output when bridged but works fine when i run a speaker to each channel. any ideas on whats wrong?


check your settings on your stereo and the amp make sure you have changed to 1 ohm on the amlifier for a briged connection to a subwoofer and change from lpf to hpf on the amp there should be a switch.

Jun 07, 2010 | Zapco Reference 750 Car Audio Amplifier

1 Answer

Zapco DC Reference 750.2 problem


If the amp uses TIP35Cs and TIP36Cs, those will be the output transistors. Measure the resistance between legs 2 and 3 for each of the output transistors. Do any read near 0 ohms?

If you're new to repairing amps. The following page should help.
http://www.bcae1.com/repairbasicsforbcae1/repairbasics.htm

Nov 16, 2009 | Zapco Reference 750 Car Audio Amplifier

1 Answer

The protect led has turned on and will not allow the amp to work. I've tried re-wiring the whole unit, changed the fuse to a high wattage, I've given it time to cool off in case it was over heating. Ive...


mosfet have a built in shut off incase of a blown resistor, if the resistor blows,it will shut down the amp, the resistors job is to inhibit power to prevent overheating, you will have to check the OHMS of each resistor to find out which one has gone......hope this was helpfull

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1 Answer

Amp powers up but just hums


The output transistors are probably shorted. There should not be any DC voltage going to the speakers. DO NOT run it this way for long or you will damage the voice coils of the speakers. This unit needs service. Expect a parts cost in the $25-$40 range.

Dan

Jul 25, 2009 | Audio Players & Recorders

1 Answer

What is the wiring orderfor the zapco seq


the basic wirings are for inputs, power and for the speakers (front and rear). If you open up the device and trace the wires to the fader control (electrically), those are for the speaker outputs. The power supply line is much easier to locate through the power capacitor..maybe. watch out for the remote wire if it has one (this triggers the device to power ON). gudluck!

Apr 10, 2009 | Car Audio & Video

1 Answer

Repair service for AG1000 Zapco Amp.


Is it blowing the three 30 amp on-board fuses?

To have 3 speakers bridged, each speaker must have at least a 12 ohm impedance (assuming that all speakers are connected in parallel). If you're running a load lower than 4 ohms (mono), the amp will likely fail.

The fuses don't blow right away because they are cold at first. As they heat up, they can blow more easily (even though the current draw hasn't increased).

Aug 10, 2008 | Car Audio & Video

2 Answers

Zapco 18 band eq


You will need to call the manufacturer, ZAPCO - 209-577-4268, or email them at tech support [email protected] , in order to purchase the part you are missing. It is possibel to hard wire the RCA parts you need and creat a homemade fix, but in all honesty it is not worth it, and it will probably introduce a lot of interference in to the quality of your signal path rendering it a bad option. Give them a call / email. If they will only sell the part to a dealer, call Car Depot @ 615 - 269-8080 and they can have the part purchased and delivered to you for a small fee. Good luck.

Feb 01, 2008 | Car Audio & Video

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