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e FL Circuit
From when the REP is switched on until the REP seg-
ments light up
When the REP is switched on, when the G1 output is
high, then a high signal is input to Pin 30 of IC201 to let
IC 201 know that the REP switch was pressed. 1C201 sets
the KS pin (Pin 11) low and outputs data to IC12 through
Pins KD0-KD4. IC12 receives this data, verifies that the
PROGRAM
REPEAT
RANDOM
DISC
=
mahal
GND
-26V AAPA
4.4Vrms
FL output
(Filament output)
IC i2
PD3053A
(System control)
SCK : Serial data clock
SD_:
Serial data
KS:
Key strobe
IKEY ON
STS
: Status
Signa! receivable|
Receiving serial data
G2
G3
| STEP
| alia lo
L min Ae see apa
Cy
i SIG,
1C201 PD4063 (FL control)
STS pin of IC201 is high, then outputs from Pins SCK
and SD the instruction to IC201 to light up the REP seg-
ments. IC201 receives this instruction (the STS pin goes
low) and if the G1 pin is high, outputs a high level signal
at the A pin (Pin 10) to light up the REP segments. (See
the Figure.)
G
ral
TICAICAICA
§
Digitgrid output
22
|
29
ofl, SL
a
rae
33
32
31
30
Fig. 8-1
FL circuit
7O
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