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3. DIGITAL CONTROL SECTION
Step
Adjustment item
Connection
Instrument required
Adjustment
terminal
locations
1
Preset memory
300D FM
FM SG
FM/AM SW
confirmation
ANT
[98MH' ± 1 kH'
l
70dBµ (75.2dBf)
MONO 1kHz
TUNING SW
100% MOD
MEMORY SW
AM ANT
AM dummy antenna
PRESET SW
AM SG
[1080kH' ±0.1kH']
80dBµ
400Hz, 30% MOD
2
Last channel
POWER SW
memory
confir-
mat ion
•TEST POINT
Main circuit board (1)
D
DD
D420
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R528
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IC415
IC414
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R503
R501
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R-70,/R-70M
Adjustment method
Rating or
Remarks
standard
CD
Memorige the PRE-
CD
Press the FM button
SET P1 at FM SG
and tuned the 98MHz
frequency.
with AUTO seach
® Memorige the PRE-
+
SET P2 at AM SG fre-
Press the Memory
quency.
button.
@Confirm that the fre-
t
quency memorized is
The Memory indicator
recalled.
lights about 3 seconds
t
Press the PRESET P1
during the Memory
indicator lights.
t
The PRESET LED of
P1 lights.
® Press the
AM
button
and tuned the 1080kHz
with
AUTO seach.
+
Press the Memory button
t
The Memory indicator
lights and the PRESET
LED of P1 flashes.
t
Press the PRESET P2
t
The Memory indicator
goes out and the PRE-
SET LED of P2 lights.
CD
Press the PRESET P1
®Turn the power
switch off.
@After about 5
seconds, turn the power
switch on.
©Confirm that the
@
The PRE-
PRESET P1 memorized
SET of P1 not
is
recalled.
lights
Tuner circuit board ( 1)
VR106
:0
FM FINE
IC107
I
IC106
5
T6mk4
TEST
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R159
~
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FRONT END
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T102 VC101
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DISCRI
DIST
CENTER
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VR103
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VR102
IT.P!l -
PILOT
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CANCEL
R152
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6
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