Rockford fosgate drop in voltage source 10001bd

[boot35]

Hello, this is my first post, excuse my English I'm using a translator, I have a Rockford Fosgate 10001bd, Avia and been repaired previously, the problem is that it has low power output, to revise note that gives a voltage + - 32 vols, Bone 64 total volts with multimeter diodes in central legs, but the volume up with speakers connected the voltage drops to 50% with distortion, I'm testing with a battery of 900 cold cranking amps and 11.5 volts lose, nothing warms out than normal, any idea where I can start looking? Thanks in advance for your time, greetings from Mexico.

[seankane]

11.5 volts is a little low to be testing that amp. What is the voltage across the red and black wires?

Red probe on red wire and black probe on black wire.

[boot35]

hello, my battery brand 12.4 volts, but by working the amplifier to a load of 1 ohm multimeter drops to 11.5 volts to operate and amplficador 4 awg wiring, so the voltage supply (battery) do not think is the problem, I would assume that the driver of the power supply is not keeping the load voltage, since in reality there is little output power of + -32 volts, volts drops to +-12 ; consumption amplifier is 2 amps idling about, any ideas? I follow the slope

[Perry Babin]

I agree. You need to test this with a supply that can keep the voltage above 13v. If you're reading 11.5, it's actually lower than that.

If you have 64v between the center legs of the rectifiers, it's actually ±64v with this amp.

[boot35]

hi perry, test in car with engine running and the same results, new battery, 13.5 volts of power amplifier only sends 64 volts between central legs of the rectifiers. and driving lanes + -32 volts, by increasing the volume in Hu, voltage decrease dramatically, up to 30 volts, and in lanes drops to ± 12 volts, the battery remains new minimum 12.5 volts.

[Perry Babin]

Measure the voltage across the screws for the on-board fuse. What is the maximum voltage you read when the amp is loaded?

[boot35]

connecting fuse multimeter red probe and black probe to central leg rectifiers brand me +50 volts and -23 volts

connecting multimeter black probe negative conectos red tube rectifiers central leg brand me +38 volts and -36 volts

amplifier check in ralenti

[Perry Babin]

I think there is a communication problem.

Try this.

On Q5 with the black probe on leg 3 and the red probe on leg 1, what is the DC voltage when the amp is loaded?

When it's unloaded?

Do the same with the black probe on leg 3 and the red on probe on leg 2. Post the voltages.

[boot35]

El Q5 con la sonda negro en la pierna de 3 y la sonda roja en la pata 1, el voltaje de CC cuando el amplificador está cargado: es 4,52 voltios

Cuando se ha descargado? es 5,082 voltios

lo mismo con la sonda negro en la pierna de 3 y la sonda roja en la pierna 2.
descargada: 14,0 voltios

cargados: 13,2 voltios

conectado a 2 ohms
* placa madre modelo pc5445

[boot35]

perry, power supply use trans irfc60? is the problem, and resistor of 39 ohms