service manual Ground Zero GZIA 2230 HPX

[xavlaur]

Hello !

Does anyone have the schematic / service manual from Ground Zero GZIA 2230 HPX?

Thanks

[xavlaur]

Hello !
I have a car amp whose scheme I can't find Ground Zero GZIA 2230 HPX but we can talk about a similar scheme - gzha-2350x.
This amplifier I suspect has a short or poor insulation in the power supply transformer because it has a very high idle current (6A).
FPQ 50N60 were tested, they had 1.5 V on low - direct polarization, I exchanged them with new ones, as well, high consumption without any load. The load is due to the low insulation of the source transformer.
The amplifier works perfectly fed separately differentially directly on capacitors.
Rectifier diodes are ok. With them removed, there is still a huge idle current consumed by the switching source. FPQ 50N60 is constantly incing.
On electrolytes there is a rectified voltage (the amplifier is powered by 2x12V / 50W in parallel which lights up 75% - so 75 W, so it would be a current of about 6A) but if it is supplied at 12 V directly, the transformer heats up and emits smoke.
I see no other load except the transformer which has a few turns on each winding.
In the primary it has 0.6 ohms.
In the secondary it has 0.2 ohms.
I am interested in who has the expertise on these transformers if the resistors are ok at 0.2 and 0.6 ohm.
It probably needs to be rewound.
I see no other explanation for such a big idle current with impeccable final stage.

Thanks