Question about Alpine MRD-M301 Car Audio Amplifier
Always turns on digital screen lights up menu works, no output power
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: Kenwood KAC-749S
Try to take out the lights that you put in yourself, but do it carefully, as you might have bridged out the power connectors that go through to your subs.
Posted on Aug 15, 2007
SOURCE: Lights on, nobody home
Appears to be an issue with current. Is the speaker the correct impedance for the amplifier ? Have you confirmed there are no short circuits in the wiring ? I'm not familiar with this particular product,
The alpine catalogue gives recommended amp/speaker combos. If you don't have an aplpine sub, then look at the specs and find a similar one. You may be trying to load the amp too heavily and it will protect itself.
Posted on Nov 21, 2007
SOURCE: 250/1 powers on but no output
If the amp is not going into protect, the power supply FETs have probably failed. In the corner of the amp near the toriodal transformer, there are 4 FETs against the heatsink. When these fail, the 47 ohm resistors at the base of the transistors often fail. If the resistors are dark, it generally means the FETs have failed. If you disconnect the amp from power and measure the resistance from leg 1 to leg 2 of the power supply FETs, a reading of near 0 ohms indicates the FETs have failed.
Posted on Dec 31, 2007
Tips for a great answer:
Jun 20, 2012 | Denon Avr1610 5.1-channel Home Theater...
Mar 06, 2012 | Audio Players & Recorders
Mar 31, 2009 | Pioneer GM-X722 Car Audio Amplifier
Mar 29, 2009 | MTX Thunder 4500 T4510-04 Car Subwoofer
Dec 24, 2008 | Sony XM-2200GTX Car Audio Amplifier
Mar 17, 2008 | Alpine MRV-T757 Car Audio Amplifier
51 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: