•
Switch Location
VOLUME
:
MAX
MEGA BASS :
OFF
AVLS
:
NORMAL
[AM]
BAND: AM
Signal generator
[FM]
BAND : FM
Signal generator
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
J301 (LINE OUT)
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 µV
T1 AM IF adjustment
CT3
L3
AM TRACKING
adjustment
CT1
L1
FM TRACKING
adjustment
L2 FM FREQUENCY
COVERAGE
adjustment
L4 AM FREQUENCY
COVERAGE
adjustment
•
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.
— 9 —
— 10 —
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 µF unless otherwise noted. pF: µµF
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.
•
U
: 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
AUS
: Australian model
JE
: Tourist model
FR
: French model
E13
: AC 220-230V area model
E33
: AC 100-240V area model
HK
: Hong Kong model
KR
: Korean model
E92
: AC 120V area model
AR
: Argentina model.
CH
: Chinese model.
G
: German model.
EE
: East European model.
EA
: Saudi Arabia 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
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
