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CHAPTER 3
CIRCUIT DESCRIPTION
3-1. POWER ON SEQUENCE
POWER-ON switch pressed
CSW-3 on SW-3 board)
IKX-PS3-
0
REMOTE signal
~---->
J
I
I
~---->
I
becomes ground level. Power
I
I __
t_u_r_n_s_o __
n_·~~------------~I.
+sv
supplied to SW-3 on
MPU-7 ooards.
CLOCK oscillation starts
CSOMHz, 32MHz, 20MHz).
I
PRESET si
oes
"H"
---->
______________
_..,.....__
________
_.
NWS-1510/1530/1580
3-1
Must be pressed until [end]
(approximately 2 seconds)
At this point, !Cl Cor Ql) on the
SW-3
board is off, so power is cut
.off if the POWER-ON switch is
released.
*
Power is supplied when the IKX-PS- 0
REMOTE signal is at ground or TTL "L"
level and cut off when it is OPEN or
at TTL "H" level.
Output goes "H" approximately
1 second after
+sv
is supplied
to IC77 (TL7705) on the MPU-7
board.
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