Remote Control - Sharp PC-1211 Service Manual

T
20
Deactivation of the· relay
(cassette to stop running)
Lr
\
QA-u
\ Activation of the relay
(cassette to start running)
~Startup of the cassette operation ~ Termination of the cassette operation
Sl4----i--~~~~~~~~~__.r--
The TC 4528P is a mono-stable multivibrator which can perform trigger operation and reset
operation and two circuits are contained in the same chip.
"A" outputs a pulse which is dependable on the time constant of CR at the falling edge of the input
signal, and "B" outputs a pulse which is dependable on the time constant of CR at the rising edge of
the input signal. The relay operates ON and OFF according to the current flow to the coil, and it is
activated when "A" is active and deactivated when "B" is active.
NR-5711
-----..,
5
ru_
I
L------~
0.04.:7PF
470Kn
100
2
Kn
4
Ain Q
6
2SA733
MT
A
REMOTO
5
Bin QA
7
74'W
(Sl4)
TC4528BP
33n
3
0.047µF
VGG
100
8 14
Kn
8
in
QB
10
2SA733
83
B
GND
11
Bin
QB
9
14w
TC4528BP
330
13
The CEl 21 will control the REMOTE terminal in automatic manner against the record, playback
and check commands.
5-3. Remote control