Very nice, that's clean and clear.
Now, start with the procedure for bias:
- connect the voltmeter on the rectangulars, adjust do 17mV. Keep in mind that you need to made several turns of the bourns to make first reading on the voltmeter.
- after obtaining readings for all four test points of roughly 17mV, proceed to DC adjustments
- connect the voltmeter on the TP1 and TP2...first between out and out, on the 5-pin connector (pins 2 and 5 as seen on the picture), and adjust at minimum. This is DC hot-cold, adjust with 100 Ohms trimmers, right and left trimmers on the most upper corners of the picture
- reconnect now to "G" and one at the time "outs" (pins 2 and 3 and 3 and 5), also adjust at minimum obtainable, but now using the 500 Ohms trimmer, the other one(s) on the upper corner.
- repeat for the other channel...
When done, at this time, the protection circuit should be released (an "click" should be hear).
Repeat ll the procedures as you want - either as described, or on the speaker terminals, but now after preheating as described previously