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Technics QUARTZ SA-GX100 Service Manual page 14

Synthesizer am/fm stereo receiver

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SA-GX100
Wi TERMINAL FUNCTION OF IC
© 10901 (LC6554H4097): Microcomputer
uo
Division
Peas [ 0 | seamen si ou
PAO
|
Key return signal input
5
PA3
w
#3]
|
< cm
De TUNING 0
TUNING 1
Key return signal input
STAND
BY
Power supply terminal
1
Power ON/OFF det. terminal
0
(Not used, open)
OG
STEREO
38
LOUDNESS
sofa
F
A
B
vp
Stereo signal det. terminal
Received signa! det. terminal
Cassette deck contro! terminal
13
[a
Cassette deck contro! terminal
1
DECK
|
(Not used, connected to GND)
> > EY
OPT1 (IN)
et
Not used, connected to GND
OPT1 (OUT)
$1
FM AUTO/MONO
select signal
MONO
-
Output
Muting contro! output for tuner
circuit
Muting contro! output for amplifier
$12
circuit
Muting control output for amplifier
circuit
Not used, connected to GND
Ground terminal
Oscillator terminal
Reset signal input
Not used, connected to GND
27 | DATA (PFO)
a oO
nN
L (PF 1)
CE (PF2)
INT
g
i
v0
Functi
Division
yncuen
lo
|
Level shift contro! output
Not used, connected to GND
LED drive control signal for
O
rotary tuning
(Not used, connected to GND)
oO
Loudness ON/OFF
signal output
fe)
Volume motor drive output
Rotary tuning control signal
(@)
output
(Not used, connected to GND)
Power supply terminal
(negative voltage)
oO
Segment'signal output
Power supply terminal
(positive voltage}
Digit signal and key scan signal
output

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