9
9
D-FS18
•
Switch Location
VOLUME
: MAX
MEGA BASS : OFF
AVLS
: NORMAL
[AM]
BAND: AM
[FM]
BAND : FM
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620kHz
CT3
1,400kHz
TUNER SECTION
Put the lead-wire
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
AM RF signal
generator
0.01
µ
F
FM RF signal
generator
FM IN
point
75kHz(100%) amplitude modulation
by 1kHz signal.
Output level: as low as possible
16
Ω
set
level meter
i
jack (J302)
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
520kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
86.5MHz
CT1
109.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
86.5MHz
Adjustment Location:
Main board
0 dB = 1
µ
V
•
Repeat the procedures in each adjustment several times for the
maximum level meter indication.
•
The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
SECTION 5
DIAGRAMS
• Waveforms
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
b
: Pattern from the side which enables seeing.
Note on Schematic Diagrams:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
H
: adjustment for repair.
•
A
: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM
<
> : CD
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
f
: AM
J
: CD
• Abbreviation
CND : Canadian model
Note:
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
1
IC601
of
XTAO
3.6 Vp-p
4MHz
2
IC801
ul
XIN
3
IC601
ua
RFAC
4
IC61
uf
XOUT
5
T81 C86
VOLT/DIV: 0.1 V AC
TIME/DV: 0.1
µ
sec
VOLT/DIV: 0.1 V AC
TIME/DV: 0.1
µ
sec
VOLT/DIV: 1.2 V AC
TIME/DV: 10
µ
sec
VOLT/DIV: 10 V AC
TIME/DV: 0.2
µ
sec
2.3 Vp-p
16.9MHz
VOLT/DIV: 1.2 V AC
TIME/DV: 20 nsec
400 – 500
mVp-p
2.4 Vp-p
13.3
µ
sec
30 Vp-p
480 nsec
T1 AM IF adjustment
L3
CT3
AM TRACKING
adjustment
L1
CT1
FM TRACKING
adjustment
L2 FM FREQUENCY
COVERAGE
adjustment
L4 AM FREQUENCY
COVERAGE
adjustment
Summary of Contents for Sports D-FS18
Page 14: ...14 14 D FS18 5 4 SCHEMATIC DIAGRAM TUNER SECTION IC B D ...
Page 15: ...15 15 D FS18 5 5 SCHEMATIC DIAGRAM CD SECTION 1 4 ...
Page 16: ...16 16 D FS18 5 6 SCHEMATIC DIAGRAM CD SECTION 2 4 IC B D ...
Page 17: ...17 17 D FS18 5 7 SCHEMATIC DIAGRAM CD SECTION 3 4 IC B D ...
Page 18: ...18 18 D FS18 5 8 SCHEMATIC DIAGRAM CD SECTION 4 4 IC B D ...
