AC to DC step-down transformer 220AC to 15 & 30V - for spares or repair - in a non working state

This unit is for either spares or repair as it is not working correctly at present.

It is pre-owned.

The unit is an  AC to DC step-down transformer 220AC to 15 & 30V with analogue meters, mounted in a steel casing with a heat sink across the back.

The front has 2 meters :

DC 0-30V analogue Voltage voltmeter   

Analogue Micro Amper METER DC 0 - 500 uA 

Unit has been tested and there appears to be an issue with the voltage and ? current knobs as they don't seem to be working,  there might be a problem inside the unit with something else. 

Dimensions; Weight unpacked 4,2 kg, approx L 205 mm x W 135 mm (including heat sink)  x H 160 mm (including feet studs)

Top of casing

Bottom of casing