Akai GX-77 Service Manual page 34

NOTES:
Bias Filter
Adjustment Test re Adjustment
Set TAPE SELECTOR to
Less than "EE". Tape Speed 7-1/2 ips.
-30 dBm Line Volume at MAX.
1 See NOTE 8.
Fig. 41
. Output Level Control should be at maximum.
. Except for Steps 7, 8 and 9, set Tape Speed to 7-1/2 ips.
. Use the following open measuring tapes:
NORMAL Tape: Maxell UD
EE Tape : Maxell XLII
TDK SA
is lit.