Do you have a question about the Sanyo JA 5503 and is the answer not in the manual?
Steps for removing the main cabinet of the stereo amplifier.
Procedure for detaching the front panel from the unit.
Connect wires and set switches for calibration.
Feed 1kHz signal and adjust volume to achieve 8.94V.
Adjust SVR751 and SVR851 for dim 10W LED indication.