5-2
5-3. SYSTEM CONTROL — MECHANISM BLOCK INTERFACE (MA-339 BOARD IC162)
*1. “L” when erasing protection tab is bent. “H” when not bent.
*2. Pulse of period in proportion to reel rotating speed.
*3. Approx. 2 msec period “H” pulse.
*4. Normally “L”. 2 msec period “H” pulse when tape top or tape end is detected.
*5. Hi-Z
Signal
CAM
MODE 1
MODE 2
MODE 3
MODE 4
REC PRF
T REEL
S REEL
END LED
T SENS
S SENS
Pin No.
MA-339
IC162 #£
MA-339
IC162 @ª
MA-339
IC162 @•
MA-339
IC162 @¶
MA-339
IC162 @§
MA-339
IC162 #º
MA-339
IC162 *º
MA-339
IC162 &ª
MA-339
IC162 @º
MA-339
IC162 7
MA-339
IC162 6
I/O
O
I
I
I
I
I
I
I
O
I
I
EJECTED
M
H
H
L
L
L
H/L
H/L
L
*3
*3
CASSETTE
LOADING
H/M
—
—
—
—
*1
H/L
H/L
L
*3
*3
CASSETTE
UNLOADING
L/M
—
—
—
—
*1
H/L
H/L
L
*3
*3
TAPE
THREADING
H/M
L
L
H
H
*1
H/L
*2
*3
*4
*4
TAPE
UNTHREADING
L/M
L
L
H
H
*1
H/L
*2
*3
*4
*4
STOP
M
H
H
H
L
*1
H/L
H/L
*3
*4
*4
FF
M
H
H
L
H
*1
*2
*2
*3
*4
*4
REW
M
H
H
L
H
*1
*2
*2
*3
*4
*4
PB
M
H
L
L
L
*1
*2
*2
*3
*4
*4
REC
M
H
L
L
L
*1
*2
*2
*3
*4
*4
5-4. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-339 BOARD IC162)
Signal
RESET
NICAM DATA
TUNER
NICAM CLOCK
TUNER
Pin No.
MA-339
IC162 #¢
MA-339
IC162 $™
MA-339
IC162 $¡
I/O
I
O
O
I/O level
Normal “H” , “L” when seryvice Interruption is detected or restored.
Serial communication data to Tuner.
Serial communication clock with Tuner.
Signal
A MUTE
Pin No.
MA-339
IC162 ^£
I/O
O
STOP/
FF/REW
L
TAPE
LOADING
L
TAPE
UNLOADING
L
PB
L
REC
L
REC/PAUSE
H
5-5. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-339 BOARD IC162)
To Next Page
Loading...
Need help?
General
