This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
Text excerpt from page 64 (click to view)
3-2. PRIOR ADJUSTMENT OF THE PATH (ADJUSTMENT OF PG)
a. Connect the Channel 1(CH1) of the Oscilloscope to TP01-3(Head Switching Pulse) and CH2 to the VIDEO OUT. And align the Tracking VR on the center. b. Playback the Stairstep Signal Tape (DN 2). c. Turn the PG Volume and adjust the gap between the Switching signal and the V-Sync signal to be 6.5H Â± 0.5H.
3-3. ADJUSTMENT OF STRAIGHTNESS
Connect the Channel 1(CH1) of the Oscilloscope to the TP01-2(CTL Pulse) and CH2 to the TP01-4 (Envelope Wav and EXT.Trigger to the TP01-3 (Switching Pulse). And then, playback the test tape of the SP Mode. 3-1) Height Adjustment for the Ace Head a. adjust the Tracking VR to maximize the FM signal of the test tape. b. Make the entrance and exit side Envelope Wave same as the Picture 5-6 by adjusting the S/T-Guide Roller (4 and 8 of Picture 5-1).
a : Envelope Maximum Output b : Envelope Minimum Output