Read Sharp SD-EX100H (serv.man21) Service Manual online
SD-EX100H
– 14 –
TUNER SECTION
Item
Point to be adjusted
Setting value
IF
Set the display of T51
Maximize the IF
to 1,620kHz.
waveform (450kHz).
Frequency
fL: T21 (530kHz)
fL : 1.3V
±
0.1
coverage (voltage Set the display to 530kHz. fH : 8.5V
±
1.3V
of TP301VT line) fH: (1,620kHz)
(Just check fH.)
Tracking
fL : T20 (990kHz)
Maximize the output of
the headphone terminal.
the headphone terminal.
fL: Low-range frequency
fC: Middle-range frequency
fH: High-range frequency
fC: Middle-range frequency
fH: High-range frequency
• Adjusting and checking AM IF/RF
ADJUSTMENT
Figure 14-1AM IF/FREQUENCY COVER
Electric
Voltmeter
GND
AM Loop Antenna
AM signal oscillator
Loop Antenna
UNIT
IF : Headphones
Frequency Cover : TP301
Frequency Cover : TP301
Frequency
Display
Adjusting
Parts
Instrument
Connection
90 MHz
90 MHz
VR31
Input: SO101
(28 dB)
Output: Headphones
(EMF.)
Terminal
• FM Mute Level
Signal generator: 400 Hz, 22.5 kHz, FM modulated
Signal generator: 400 Hz, 22.5 kHz, FM modulated
Electric
Voltmeter
GND
FM Signal Oscillator
UNIT
Headphones
Terminal
SO101
Figure 14-2 FM MUTE LEVEL
Figure 14-3 ADJUSTMENT POINT
AM IF
FM MUTE
LEVEL
AM
TRACKING fL
SO101
ANTENNA
TERMINAL
ANTENNA
TERMINAL
AM BAND
COVERAGE
VR31
T51
T20
T21
FE10
FM
GND
GND
AM
TUNER PWB
TP301
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