Toshiba D-VR3SU Service Manual page 123

Circuit Operating Descriptions
(21) Timer/OTR Control
The timer can preset 12 programs in one month including daily and weekly programs.
Express recording lets the operator record up to 4 hours without programming the timer.
(22) Clock Display
The clock generator inside of the u-COM counts the oscillation signal of XT601 for the timer clock data.
(23) Power Failure Detection
u-COM goes to the power failure mode when the 88 port is lower than 4/5 of AD Vcc level.
(24) 4H'D Control
During trick play (still,slow,F-advance), it is necessary to control pre-amp,video circuit. the micom control pin 98
(C-ROTARY), pin 99 (HD-AMP) of the IC601 during PB period in Slow mode.
These port is applied to video IC to operate the trick play.
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