Read Sharp FV-DB2ES (serv.man3) Service Manual online
FV-DB2E
2 – 1
Audio
FV-DB2E
Service Manual
FV-DB2E
Market
E
CHAPTER 2.
ADJUSTMENTS
[1] Tuner section
fL: Low-range frequency
fH: High-range frequency
• Check FM VT
Signal generator: 400 Hz, 225 kHz dev., FM modulated
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Detection
Signal generator: 10.7 MHz FM sweep generator
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
*1 Input: Antenna Output: Pin 23 of IC301
[2] How to check the version number of the
system microcomputer
system microcomputer
1. Turn the power off.
2. With holding down “PRESET SELECT” and “PRESET2” buttons,
turn the power on.
3. The version number displays as below.
Version number display
Frequency
Display
Check
Point
Instrument
Connection
87.5 MHz
87.5 MHz
1.5 V
± 1.0 V
TP-VT
108 MHz
108 MHz
5.0 V
± 1.0 V
TP-VT
Frequency
Display
Instrument
Connection
98.00 MHz
98.00 MHz
Input: Antenna
Output: Speaker Terminal
Output: Speaker Terminal
Test
Stage
Frequency
Frequency
Display
Instrument
Connection
FM IF
10.7 MHz
98.00 MHz
Input: Pin 36 of IC301
Output: Pin 23 of IC301
Output: Pin 23 of IC301
Test
Stage
Frequency
Frequency
Display
Setting/
Adjustment
Parts
Instrument
Connection
FM Band
Coverage
Coverage
—
87.50 MHz
(fL): L307
1.5
1.5
± 0.1 V
*1
FM RF
98.00 MHz
(10 ~ 20 dB)
(10 ~ 20 dB)
98.00 MHz
L304
*1
Figure 1 ADJUSTMENT POINTS
L304
R311
L307
TP-VT
FM RF
FM BAND
COVERANGE fL
COVERANGE fL
36
23
IC301
TUNER PWB
Ver. 08C
← Version number of the system microcom-
puter
SHP_SER_V1. 7. 2
← Version number of DAB module
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