Table of Contents
Advertisement
QQ
3 7 63 1515 0
6. ADJUSTMENT
6.1 CD SECTION
Note : There is no information to be shown in this CD adjustment.
6.2 TUNER SECTION
6.2.1 FM Tuner Section
• Set the mode selector to FM BAND.
• Connect the wiring as shown in Fig. 1, 2.
Step
Adjustment
No.
Title
DET. waveform
1
Coil Adjustment
6.2.2 AM Tuner Section
• Set the mode selector to AM BAND.
• Connect the wiring as shown in Fig. 1, 2.
TE
L 13942296513
Step
Adjustment
No.
Title
Vt
1
(Tuning Voltage
Adjustment)
2
IFT Adjustment
Tracking
3
Adjustment
www
.
http://www.xiaoyu163.com
FM SG (1kHz, ± 75kHz dev.)
Frequency
Level
(MHz)
(dBmV)
98
60
AM SG (400Hz, 30% Mod.)
Frequency
Level
(kHz)
(dBmV/m)
−
531
−
1602
999
S/N about 10dB
50
603
(S/N about 10dB)
1404
x
ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
Reception
Adjustment
Frequency
Location
Display
98MHz
L7
Q Q
3
6 7
1 3
Reception
Adjustment
Frequency
Location
Display
• Adjust L2 so that the voltage between TP6 (+) and TP7
531kHz
L2
(−) becomes 1.0V.
−
• Set the reception frequency to 1602 kHz and confirm
1602kHz
that the voltage is about 6.1V.
1. Connect an electrolytic capacitor of about 10µF to TP9
(TP9 side is +), and terminate with TP10 by a resistor
of about 47kΩ. Connect the sweep input to the both
ends of terminated resistor.
2. Adjust T1 so that the marker of 450kHz ± 3kHz
999kHz
T1
becomes the same level (single-peak characteristic of
IF becomes symmetrical).
3. Input 74dBµV from the SSG, confirm the waveform of
output signal so that the output level is −27 ± 2dBV
and THD is about 1 ± 0.5%. And confirm that the
"TUNE" indicator in the LCD is turned on.
Connect an oscilloscope to TP3 (L) and TP4 (R), and
L1
603kHz
adjust L1 (603kHz) and TC1 (1404kHz) repeatedly so that
TC1
1404kHz
the output level becomes maximum.
.
9 4
2 8
Specifications
• Adjust L7 so that the voltaghe between TP8 (+)
and TP9 (−) becomes 0V ± 50mV.
• Check the waveform with the oscilloscope, and
confirm so that the output level is about −11 ±
2dBV and THD is about 0.5 ± 0.1%.
Confirm that the "TUNE" indicator in the LCD is
turned on.
1 5
0 5
8
2 9
9 4
Specifications
m
co
X-HX700
9 9
2 8
9 9
33
Advertisement
Table of Contents
