5-4. SYSTEM CONTROL – AUDIO BLOCK INTERFACE (MA-377 BOARD IC101)
STOP/ TAPE TAPE
PB • REC •
Signal Pin No. I/O FF/ THREAD- UNTHREAD- PB
PAUSE
SLOW × 2 CUE REVIEW REC
PAUSE
REW ING ING
AU RF
MA-377
I AF RF envelope signal input terminal for automatic tracking.
IC101qf
A MUTE
MA-377 O
Hi-Z Hi-Z Hi-Z Hi-Z H H H H H L L
IC101ul (O.D)
AF SWP
MA-377
O *1 *1 *1 *1 *1 *1 *1 *1 *1 *1 *1
IC101wd
FULL ERASE
MA-377 O
H H H HHHHHHLH
IC101oa (O.D)
REC P
MA-377
O
L L L LLLLLLHL
IC101os
NAPB
MA-377
O
L L L LLLLLLHL
IC101wa
∗1. 25 Hz (PAL), 30 Hz (NTSC) 50% duty pulse approx. 5 msec delayed from RF SW P.