Read Sharp XL-DV50 (serv.man2) Service Manual online
XL-DV50H
2 – 1
Audio
XL-DV50H
Service Manual
XLDV50H
Market
E
CHAPTER 2.
ADJUSTMENTS
[1] ADJUSTMENT
1. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
2. DVD/CD SECTION
• Adjustment
Since this DVD/CD system incorporates the following automatic
adjustment functions, readjustment is not needed when replacing
the pickup. Therefore, different PWBs and pickups can be com-
bined freely.
adjustment functions, readjustment is not needed when replacing
the pickup. Therefore, different PWBs and pickups can be com-
bined freely.
Each time a disc is changed, these adjustments are performed
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF
450 kHz
1,620 kHz
T351
*1
AM Band
Coverage
Coverage
—
522 kHz
(fL): T306
1.1 ± 0.1 V
1.1 ± 0.1 V
*2
AM Tracking
990 kHz
990 kHz
T302
*3
*1. Input: Antenna
Output: TP302
*2. Input: Input is not connected
Output: TP301
Frequency
Display
Check
Point
Instrument
Connection
87.5 MHz
87.5 MHz
2.2V ± 1.0V
TP-VT
108 MHz
108 MHz
7.8V ± 1.0V
TP-VT
Frequency
Display
Adjusting
Parts
Instrument
Connection
98.00 MHz
(30 dB
(30 dB
µV)
98.00 MHz
VR351
Input: Antenna
Output: Speaker Terminal
Output: Speaker Terminal
Figure 1 ADJUSTMENT POINTS
CNP301
FE301
SO301
T302
AM
Tracking fL
AM BAND
COVERAGE fL
T306
T351
AM IF
FM MUTE
LEVEL
VR351
IC303
IC302
20
C393
TP301
TP302
R350
R357
R356
TUNER PWB-A2
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