Sony TRINITRON KV-VF21M70, Руководство по обслуживанию

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4-2. SYSTEM CONTROL-VIDEO BLOCK INTERFACE (MA10 BOARD IC402)
TAPE TAPE PB · PICTURE SEARCH REC ·
Signal Pin No. I/O STOP FF REW THREADING UNTHREADING PB PAUSE SLOW X2 CUE REVIEW REC PAUSE
REC CTL IC402
7
O HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z *1 HI-Z
O HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z
CAP STOP IC402
#¢
(O.D)
L
(O.D) (O.D) (O.D) (O.D) (O.D)
L *3
(O.D) (O.D) (O.D) (O.D) (O.D)
STEP PLS IC402
(ª
O L L L L L L L *2 L L L L L
PB CTL IC402
^¶
I H *6 *6 *1 H/L *2 *6 *6 *6 *1 H
DRUM PG IC402
^•
I *4 *1 *1 *5 *5 *1 *1 *1 *1 *1 *1 *1 *1
DRUM FG IC402
^ª
I *4 *7 *7 *5 *5 *7 *7 *7 *7 *7 *7 *7 *7
CAP FG IC402
&º
I H/L *6 *6 *5 *5 *6 H/L *2 *6 *6 *6 *6 H/L
CAP DA IC402
&£
O *8 *8 *8 *8 *8 *9 *8 *8 *9 *9 *9 *9 *8
DRUM DA IC402
&¢
O *10 *10 *10 *10 *10 *10 *10 *10 *10 *10 *10 *10 *10
CTL RESET IC402
0
I/O HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z *11 HI-Z HI-Z HI-Z HI-Z HI-Z
RF SW P (SW30) IC402
1
O *1 *1 *1 *1 *1 *1 *1 *1 *1 *1 *1 *1 *1
Q VD IC402
4
O L L L L L *2 *3 *3 *3 *3 *3 L L
V SYNC IC402
^§
I *4 *4 *4 *5 *5 *5 *5 *5 *5 *5 *5 *5 *5
TAPE TAPE PB · PICTURE SEARCH REC ·
Signal Pin No. I/O STOP FF REW THREADING UNTHREADING PB PAUSE SLOW X2 CUE REVIEW REC PAUSE
*1. 30Hz 50% duty pulse synchronizing with drum rotation.
*2. Normally “L” . “H” when the video signal is not detected.
*3. V period “H” pulse.
*4. “H” in the LP mode. Selected according to the recording mode.
*5. Selected according to the tape recording mode.
4-3. SYSTEM CONTROL-SERVO PERIPHERAL CIRCUIT INTERFACE (MA10 BOARD IC402)
*1. 30Hz 50% pulse.
*2. Pulse in tape running.
*3. Reverse logic pulse of STEP PLS.
*4. “L” when drum rotation stops.
*5. Unstable period pulse.
*6. Pulse of Period proportionate to tape speed.
*7. 360Hz pulse.
*8. Pulse in tape running.
*9. Approx. 2 msec. period “H” or “L” pulse.
*10. Approx. 1.5 msec. period “H” or “L” pulse.