Alpine MRP-F240

[Perry Babin]

Check the resistor and zener diode connected to the base (leg 3).

 

[mike49504]

The Diode is defective..

Do you know what diode it is or what one i can use to replace it?

 

[Perry Babin]

It's a 16v Zener.

 

[mike49504]

So a 1N4745 or 1N5264B should work ?

 

[Perry Babin]

the 4745 and the 5246 (not 5264) would work but you need to use the one that's as large as or larger than the original.

 

[mike49504]

would the IN4744 work right now for testing Its a 15 volt zener or not ?

 

[mike49504]

Ok I found a 1N4745A i will solder it in and see what happens

 

[mike49504]

Amp powers up an plays audio now Thanks again..

 

[Daviey]

My Alpine mrp f240 amp, has no audio when the car engine shuts off and turns back on. The power light is on, 12.8-14.5 volts is at the remote and battery terminals. When this happens I have to disconnect the B+ from the amp for a few seconds and then reconnect, and the audio comes back. Has to be done with the radio on. Please help as this is sometimes frustrating to do, Everytime the car has to be started

 

[Perry Babin]

Please don't post in a repair thread that was started by someone else unless you are trying to help them.

Start a new thread if you need help with a repair of your own.