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Technics Quartz ST-G7 User Manual

Technics Quartz ST-G7
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@
FUNCTION
OF
TERMINAL
(MICRO
COMPUTOR
IC903
¢
MN1554STD)
@
FUNCTION
OF
LIQUID
CRYSTAL
PANEL
:
e
COMMON
|
aa
VO
Mark
Description
of
terminal
ei
as
1/0
Mark
Description
of
terminal
ete
1
INPUT
yT
CE1
Power
failure
detection,
De-
35]
INPUT
AD
Analog
digital
converted
tected
with
input
at
“L".
signal
is
put
in
from
IC902
®
terminal
14.
Power
“ON”
Power
*OFF”
4.
5v
36
|
INPUT
SD
This
input
terminal
detects
ie
the
reception
of
a
auto
tuned.
2.5V
with
a
broadcast
received,
ro
Tt
:
: ;
and
O
V
without
ivi
2,3
—_—
Not
used
in
this
unit
=
Broadens.
epee
sae
4
|
INPUT
CE2
Power
failure
reset
detection.
|
|
rive
“output”
!
Detected
with
input
at
‘"L”’.
—2.5V
Power
“OFF”
Power
“ON”
OV
10V
Auto
tuning
5V
;
:
.
37
Not
used
in
this
unit
_
|
&
|
INPUT
INT
Interrupt
request
signal
input
38
|OUTPUT|
KOQ9
Diode
matrix
key
scan
signal
e
SEGMENT
i
terminal.
Signal
from
control
output
|
input
bal
Is
put
in.
De-
39
}OUTPUT
HBL
Hi-blend,
High
frequency
—_—
tected
with
input
at
“L”.
cutting
command
output
=
IN.
i
en
Oe
aly!
during
weak
input
signal
91)
26
th
“a
Le
cH
|
reception,
Szbmsec_SB0msec
200meec
4
40
—_
Not
used
in
this
unit
6
JOUTPUT
SBT
Signal
output
of
transfer
re-
2
ference
clock
for
LCD
drive.
42
Waveforms
No.
(SV
alter
reference
clock
43
|OUTPUT|
DT
OUT;
Data
output
to
personal
com-
output)
puter.
2usec
5V
44
;OUTPUT|
RF
ATT;
Gain
control
output
of
RF
amplifier.
1v
+
45
oe
Not
used
in
this
unit
L
7
JOUTPUT
SBO
Reference
frequency
output.
a
(Data
output)
@
i
53
|
INPUT
OSsC1
Connection
terminals
of
8
|OUTPUT
SBI
ceramic
oscillator.
54
|
INPUT
OSC2
Oscillating
frequency
is
2
MHz.
55,
Not
used
in
this
unit
Microcomputer
reset.
Reset
9
INPUT
RST
with
input
at
“LL.
10
JOUTPUT
ae
Signal
output
for
key
scan
Termin
No.
of
1C904
Ground
terminal
FM/AM/REC
Q
17
KO7
58
|
OUTPUT
OUTPUT
Pulse
waveform
output
for
neg
FOWTPUT
Se
selector
a
the
beginning
and
the
end
[FM
|
AM
[REC]
:
;
of
each
data.
ary
1
[0
|
Pa
©
Common
output
waveforms
of
1C904
(LCD
drive)
@
Segment
output
waveforms
of
1C904
(LCD
drive)
19
Not
used
in
this
uni
o-ov
[811
[7
jo
|
;
=
—_
ot
used
in
this
unit
Terminals,
34
and
17
always
deliver
outputs
whose
24
60}
Not
used
in
this
unit
=
waveforms
are
shown
below.
+
:
61
|OUTPUT
IF
Normal/Super
narrow
select
—_
;
25
|
INPUT
VDD
Power
supply
terminal
|
for
FM
IF
Sane!
flow
34
terminal
(COM
1)
of
iC904
Between
34
terminal
of
IC904
and
other
terminals
26
es
Not
used
in
this
unit
Sao
¢|
output
"L"
(OV)
»FM
IF
(1,3
~5,7~13,
21,
22,
24
~
26,
29
~
32)
of
IC904
27
band
is
super
narrow
;
T
output
“'H”
(4V)
»FM
IF
!
i
1
28
JOUTPUT
|
333
Hz
Reference
signal
output
®
|
band
is
normal
for
record
level
check.
: - -
Segment
Segment
|
Segment
:
Segment
29
|
INPUT
KIO
Key
input
from
external
B2
=
mas
Netesed
in
Usunt
==
“ON”
“ON”
|
“OFF”
|
“OFF”
2 2
key
matrix.
©
63
|OUTPUT|
MONO
Stereo/Monaural
switching
—_—
32
KI3
signal.
(Monaural
-5V,
i
33
|
INPUT
VDD
Power
supply
terminal
Sishee
OY
;
64
|OUTPUT}
MUTE
Output
terminal
to
eliminate
34
|
INPUT
ST
anes
ee
oe
shock
noise
in
case
of
PLL
signal
with
input
at
:
lock
failure.
When
CE
terminal
is
at
low
level,
the
output
to
Segment
|
Segment Segment
Segment
this
terminal
is
at
high
level.
“ON”
“OFF”
"ON"
“OFF”
Ei
deel
en
17
terminal
(COM
2)
of
1C904
:
1.5sec
0.4v
Fate
Power
ON)
@
How
to
measure
the
waveform
rower
SOF,
of
each
segment
(NOTE)
For
the
output
waveform
of
each
Connect
common
segment,
the
potential
difference
terminal
of
IC904
from
that
of
COM
terminal
wave-
ees
Between
17
terminal
of
1C904
and
other
terminals
(1
~5,7~9,11~14,
29
~
33)
of
IC904
Oscilloscope
form
is
measured.
So,
do
not
con-
Connect
as
nect
the
groundign
wire
of
other
each
segment
—+_______]
equipment
to
the
oscilloscope.
terminal
of
Otherwise,
1C904
will
break
down.
1¢904
=
—16—

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Technics Quartz ST-G7 Specifications

General IconGeneral
BrandTechnics
ModelQuartz ST-G7
CategoryTuner
LanguageEnglish

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