I love older radio's and the service manuals that are sometimes hard to find. Was able to find a manual quite easily on this site.
Text excerpt from page 4 (click to view)
TRANSISTOR ILLUSTRATION
C
G
B E
S D
2SC3326 2SC4116 RN1304 RN1307 RN1310
2SJ106
ADJUSTMENT
1. Tape Speed Adjustment Settings: � Test tape: TTA�100 (Tape center) � Test point: Phones Jack (J102) � Adjustment location: SFR301 � PAUSE: OFF � VOLUME: Maximum � TAPE SPEED: Normal (Speed volume center) Method: Play back the test tape and adjust SFR301 for 3000Hz ± 10Hz. 2. Azimuth Adjustment Settings: � Test tape: TTA�330 � Test point: Phones Jack (J102) � Adjustment location: Head azimuth adjustment screw � PAUSE: OFF � VOLUME: Maximum � TAPE SPEED: Center Method: Play back the test tape and adjust screw so that the output become maximum.