Pioneer ODR RS-D2 volume query

[dhamia]

Hi guys I have just picked up a Pioneer ODR RS-D2 cd tuner, ODR remote control and ODR pre amp.
I ran a quick test just to check for sound and basic functions, the units powered up fine, cd player plays cd and selects tuner, the front panel selects source,opens closes the face panel but the volume control does nothing?

Am I doing something wrong or is this a fault with the deck?
there appears to be no sound when hooked up to an amp, I figured it was because the volume is possibly turned off or all the way down?

Any help with this would be appreciated thanks