the amp controls will be: volume, input selector, treble control, bass tone control.
all components are easy to find.
There are a few adjustments to make: the amplifier bias and the vumeter level calibration.
Bias amply :
turn trimmer to reach 50mV on R18 resistor
Design of a "vintage" style integrated amplifier, modular with plug-in cards, power of about 25 watts / 8 ohm per channel 50watt / 4ohm, all the circuitry is transistorized. The modules that make up the amp are: PSU, pre-line, tone control, MM phono pre-phono to fet, driver x vumeter, relay input control and the two amplifier modules.
For operation, a transformer or two separate secondaries of 36vac 100VA and 24vac 10VA are required.
YOU can enlarge every image to view hires and click on bom to view the components list of every pcb.