CASSETTE CASSETTE
TAPE TAPE
PB • REC •
Signal Pin No. I/O EJECTED
LOADING UNLOADING
THREAD- UNTHREAD- STOP FF REW PB
PAUSE
SLOW × 2 CUE REVIEW REC
PAUSE
ING ING
CAM
MA-377
O Hi-Z H L H L *7 *7 *7 *7 *7 *7 *7 *7 *7 *7 *7
IC101id
MODE 1
MA-377
IH L L *1 *1 HHHHHHHH L HH
IC101if
MODE 2
MA-377
IH L L *1 *1 HHHLLLLL L LL
IC101ig
MODE 3
MA-377
IL L L *1 *1 HLLLLLLL H LL
IC101ih
MODE 4
MA-377
IL H H *1 *1 LHHLLLLL L LL
IC101ij
REC PRF
MA-377
IH *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2
IC101tg
T REEL
MA-377
I H/L H/L H/L H/L H/L H/L *3 *3 *3 H/L *3 *3 *3 *3 *3 H/L
IC101ik
S REEL
MA-377
I H/L H/L H/L *3 *3 H/L *3 *3 *3 H/L *3 *3 *3 *3 *3 H/L
IC101il
END-LED
MA-377 O
*4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4
IC101uf (O.D)
CAP RVS
MA-377
I L H L H/LHLHHHHH L HH
IC101od
T SENS
MA-377
I *4 *4 *4 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6
IC101qs
S SENS
MA-377
I *4 *4 *4 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6 *6
IC101qa
5-3. SYSTEM CONTROL – MECHANISM BLOCK INTERFACE (MA-377 BOARD IC101)
∗1. Uncertainty.
∗2. “L” when erasing protection tab is bent, “H” when not bent.
∗3. Pulse of period in proportion to reel rotating speed.
∗4. Approx. 2 msec period “H” pulse.
∗5. Pulse at tape running.
∗6. Normally “L”. 2 msec period “H” pulse when tape top or tape end is detected.
∗7. When transition to UNLOADING direction: L.
When transition to LOADING direction: H.
When CAM motor is stopped: Hi-Z.
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