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Circuit Operating Descriptions
(20) Tape Counter Control
Fig. 14-16 is a simplified diagram of the tape counter control circuit. The tape counter in the u-COM counts the
control pulses derived from control head. The control signal on the control track of the tape is picked up by the
control head and supplied to pins 74, 75 of IC601. The control pulse is amplified by the u-COM IC. The u-COM
determines the tape direction so the counter counts up when the "CAP F/R"signal is Hi and the counter counts
down when the "CAP F/R" signal is Low. By counting the control pulse, the counter data is supplied to the VF
display. Counter displays the time and it is increased or decreased by one minute after counting 1800 control puls-
es. Counter mode is switched to clock mode when the display button is pushed or when the VCR goes to power
off mode. When the Clear button is pressed, the counter is reset to "00 : 00".
The tape counter has a memory stop function.
14-24
74
75
Fig. 14-16 Counter Display
LED DISPLAY
Drive IC
IC701
Pin 83 ~ 85
Samsung Electronics
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