System Control - Mechanism Block Interface (Ma-339 Board Ic162); System Control - System Control Peripheral Circuit Interface; System Control - Audio Block Interface - Sony SLV-SE70 Service Manual

5-3. SYSTEM CONTROL — MECHANISM BLOCK INTERFACE (MA-339 BOARD IC162)
Signal Pin No. I/O EJECTED
MA-339
CAM O M
IC162 #£
MA-339
MODE 1 I H
IC162 @ª
MA-339
MODE 2 I H
IC162 @•
MA-339
MODE 3 I L
IC162 @¶
MA-339
MODE 4 I L
IC162 @§
MA-339
REC PRF I L
IC162 #º
MA-339
T REEL I H/L
IC162 *º
MA-339
S REEL I H/L
IC162 &ª
MA-339
END LED O L
IC162 @º
MA-339
T SENS I *3
IC162 7
MA-339
S SENS I *3
IC162 6
*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
5-4. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-339 BOARD IC162)
Signal Pin No. I/O
MA-339
RESET I Normal "H" , "L" when seryvice Interruption is detected or restored.
IC162 #¢
NICAM DATA MA-339
O Serial communication data to Tuner.
IC162 $™
TUNER
NICAM CLOCK MA-339
O Serial communication clock with Tuner.
IC162 $¡
TUNER
5-5. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-339 BOARD IC162)
STOP/
Signal Pin No. I/O
FF/REW
MA-339
A MUTE O L
IC162 ^£
CASSETTE CASSETTE TAPE TAPE
STOP
LOADING UNLOADING THREADING UNTHREADING
H/M L/M H/M L/M
— — L L
— — L L
— — H H
— — H H
*1 *1 *1 *1
H/L H/L H/L H/L H/L
H/L H/L *2 *2 H/L
L L *3 *3
*3 *3 *4 *4
*3 *3 *4 *4
I/O level
TAPE TAPE
PB REC
LOADING UNLOADING
L L L L
FF REW PB REC
M M M M M
H H H H H
H H H L L
H L L L L
L H H L L
*1 *1 *1 *1 *1
*2 *2 *2 *2
*2 *2 *2 *2
*3 *3 *3 *3 *3
*4 *4 *4 *4 *4
*4 *4 *4 *4 *4
REC/PAUSE
H