Question about Alpine MRD-M1001 Car Audio Amplifier

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Amp keeps blowing fuses (alpine mrdm1001

I have just bought this amp . it has four 20 amp fuses on it and when i try to connect power to it 2 of the four fuses keep blowing. I have tried it in several different cars and it still does the same thing. The only way i got this to work was by changing the blown fuse for 30 amp fuses. I tried this for about 1 minute and it seemed to work fine but i disconnected it because i did not want to damage the amp. after i disconnected everything i tried to put the 20 amp fuses back in but it blew them even with no power going to the amp
does anybody know why

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Hello prabh_dusanj,

First make sure that the amp is not operating into too low of an impedance. If the load is OK, it's most likely a short in the output transistors.

Hope this helps.

Posted on Sep 12, 2009

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My four-wheel drive is blowing fuses I unplugged the trany the front axel and it still blows


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T -case fuse #2 20 amp I/P fuse box , #4 gauges fuse 10 amp I/P fuse box Both of these power control module for 4X4 . 4WD fuse # 24 25 amp I/P fuse box .

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Amp keeps blowing fuses


Blowing fuses, was caused by many thing.
Short of rectifier,resistor,elco,tube heater,tube pin, and also trafo itself (primary or secondary winding). It must check step by step.
CAUTION :
THIS IS HIGH VOLTAGE AREA.
RISK OF ELECTRIC SHOCK THAT CAN KILL.
DON'T DO THIS IF YOU ARE NOT TECHNICIAN OR NOT FAMILIAR WITH VACUM TUBE CIRCUIT. THE CIRCUIT MAY STILL CONTAINS ELECTRIC SHOCK EVEN IF IF THE AMP IS NOT POWER PLUGGED.


The simple steps (see picture) are:
  1. Disconnect all connection from secondary of power trafo (PLV,PDCH,PACH and PHV).
    Power ON the amp. If fuse is not blowing,trafo is good.
  2. Power OFF the amp. Unplug the cord.
    Connect PLV1-PLV2-PLV3 (this are Bias voltage,+/-15VDC and Backlight PCB voltage) to power trafo.Power ON the amp. If fuse is not blowing,PLV circuit is good.If fuse blowing,there are parts is damage (dioda,elco,7815/7915,resistor) in this PLV circuit.
  3. If step 2 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV circuit stay connected,connect PDCH 1-2 and PACH 1-2 to power trafo. Power ON the amp.
    If fuse is not blowing,PDCH and PACH circuit is good and all tubes heater/filaments are lights after a few seconds.
    If fuse blowing,there are parts is damage (dioda,elco,tube heater pins) in this PDCH/PACH circuit.
  4. If step 3 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV,PDCH,PACH circuit stay connected,connect PHV 1-2 to power trafo.
    Power ON the amp. CAUTION: HIGH VOLTAGE AREA is ON.
    If fuse is not blowing,PHV circuit is good.
    If fuse blowing,there are parts is damage (dioda,elco,tube pins) in this PHV circuit.
.amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-0.jpg
Notes:
  • Steps had to be done sequentially from 1 to 4, not upside down.
  • If tube/heater pin is short,it can't be repair. The tube must be replacing.
  • PDCH circuit is voltage for V1-2-3-4 heater/filaments.
  • PACH circuit is voltage for V5-6-7 heater/filaments.
  • Always replace fuse with same type.

amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-1.jpg

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1 Answer

Why does the ATC fuse keep blowing


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What do you do when your amp keeps blowing fuses


First off which fuse is it? The inline fuse from the battery or the amplifiers power supply fuse? Blowing the main fuse from the battery is caused by either the load (your amp) drawing too much current or you have a short to ground somewhere. Maybe there is a tear in the 12Vdc line and it is shorting to the chassis of your car. If the amps power supply fuse is blowing as soon as it turns on your amp has a shorted power supply. This will require internal component changes by a technician. If it is blowing after operation at high volumes I would say change the impedance that the amp is driving. If you are at 2 ohm try to rewire your speakers for four ohm. (go from parallel to series wiring then bridge mono or operate the amp in stereo mode)

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temporarily and see if it blows the slightlty larger fuse. if it does it's more likely to be something wrong with the ciggarette lighter socket if it doesn't blow the fuse it's more likely to be the power supply. Ebay for another one perhaps ??

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1 Answer

Keeps blowing fuses!!!


HI ..PUT AN AMP METER IN LINE TO SEE WHAT THE AMP IS DRAWING..WHEN IT IS CRANKED UP ..IS 20 AMP WHAT IT CALL FOR ON THE AMP IF SO I WOULD NOT GO ANY HIGHER.....BUT IF YOU HAD JUST USED 20 AS A STARTING POINT FOR AN AMP-AGE...SOMETIMES IT IS BETTER THAT THE FUSES BLOW ONCE IN AWHILE THAN THE AMP...ALSO CHECK FOR A LOOSE GROUND.....GOOD LUCK

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1 Answer

1700 watt fog machine keep tripping GFC and blowing fog machine fuse


the fog machine needs to be on a dedicated line because of the wattage it does and the amp is rated as a 15 means the circuit breaker on this line needs to be 15 min safe at 20....
the fog machine is like a mircrowave and any major appliance needs dedicated lines not shared with lights or outlets besause it draws a lot of power to start and run and depends how long watts is simular to power the more light bulbs connect to a circuit breaker adds up 4 75w light bulbs adds up to 300 watts and that not includling outlets that may be connected....
not a gfci Unless dedicated at 20a....

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2 Answers

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Here are some answers:

1. Make sure your amp does not have a higher amp rating then the fuse, For example, an 18 amp amplifier will blow an 15 amp fuse, so connect it to a 20 amp fuse

2. you have a connection issue, where something is shorting out

3. you are pushing the amp or car to it's limit with how loud you put it, and thus blowing it, fixed by getting a more powerful amp and a better fuse.

4. or there is something very wrong and cannot help you and you would have to bring it into a shop.

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1 Answer

Lanzar amp


If it keeps blowing fuses then #1 its internally damaged or "blown" .. Or #2 i would make sure you have the battery power hooked up to the + terminal and the ground wire running from the car body to the - terminal.. so if its hooked up correctly and keeps blowing fuses then it requires repair.. I wish i had better news but thats all it can be...

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