Sony KV-VF21M40 service manual 103

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CAM UN LOAD IC402 9O HI-Z H L H L *7 *7 *7 *7 *7 *7 *7 *7 *7 *7 *7
CAM LOAD IC402 8OLLLLLLLLLLLLLLLL
MODE 1 IC402 @™ IHL L*1*1HHHHHHHHLHH
MODE 2 IC402 @¡ IHLL*1*1HHHLLLLLLLL
MODE 3 IC402 @º ILLL*1*1HLLLLLLLHLL
MODE 4 IC402 !ª ILHH*1*1LHHLLLLLLLL
C IN REC PRF IC402 !¶ I L *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2 *2
T REEL FG IC402 ^¢ 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
S REEL FG IC402 ^£ I H/L H/L H/L *3 *3 H/L *3 *3 *3 H/L *3 *3 *3 *3 *3 H/L
O
T/S LED IC402 #∞(O.D) *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4 *4
O
CAP STOP IC402 #¢ (O.D) LL LHHLHHHL*5HHHHL
CAP RVS IC402 &™ O L H L H/L H L H H H/*5 H H L H H
T SENS IC402 ^¡ I*4*4*4*6*6*6*6*6*6*6 *6*6*6 *6*6*6
S SENS IC402 ^™ I*4*4*4*6*6 *6*6*6*6*6*6*6*6*6*6*6
CASSETTE CASSETTE
TAPE TAPE PB · PICTURE SEARCH REC ·
Signal Pin No. I/O
EJECTED
LOADING UNLOADING
THREADING UNTHREADING
STOP FF REW PB PAUSE SLOW X2 CUE REVIEW REC PAUSE
Signal Pin No. I/O Function
ASURA RESET IC402 $º I Normally "H"."L"when service interruption is detected or restored.
ASURA CS IC402 $¢ I Chip select signal from the timer microprocessor. V period “L” pulse.
S IN 0 IC402 $∞I Serial communication data from the timer microprocessor. V period “L” pulse.
S OUT 0 IC402 $§ O Serial communication data to the timer microprocessor. V period “L” pulse.
S CLK IC402 $¶ I Serial communication clock with the timer microprocessor. V period “L” pulse.
A MUTE IC402 $ª OLL LL L*1HHHHHL L
(O.D)
TAPE TAPE PB · PICTURE SEARCH REC ·
Sigmal Pin No. I/O STOP FF REW LOADING
UNLOADING PB PAUSE SLOW X2 CUE REVIEW REC PAUSE
4-4. SYSTEM CONTROL-MECHANISM BLOCK INTERFACE (MA10 BOARD IC402)
*1. Uncertainty.
*2. “L” when the erasing protection tab is bent, “H” when not bent.
*3. Pulse of period proportionate to reel rotation speed.
*4. Apporx. 2 msec. period “H” pulse.
*5. Pulse in tape running.
*6. Normally “L”. 2 msec. period “H” pulse when tape top or tape end is detected.
*7. “L” when unloading to switchover. “H” when loading. “HI-Z” when CAM motor is stop.
4-5. SYSTEM CONTROL-SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA10 BOARD IC402)
4-6. SYSTEM CONTROL-AUDIO BLOCK INTERFACE (MA10 BOARD IC402)
*1. 30Hz 50% duty pulse approximately 5 msec. delayed from RF SW P.