Chapter 2. Adjustments; Adjustment; Figure - Sharp XL-DV5 Service Manual

XL-DV5/DV50
E Market XLDV50/5 Service Manual XL-DV5/DV50 Audio
CHAPTER 2.
ADJUSTMENTS

[1] ADJUSTMENT

1. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency Frequency
IF 450 kHz 1,602 kHz
AM Band — 530 kHz
Coverage
AM Tracking 990 kHz 990 kHz
*1. Input: IC301 1Pin Output: IC301 23Pin
*2. Input: Input is not connected
*3. Input: Antenna Output:IC301 23Pin
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency Display
87.5 MHz 87.5 MHz 3.4V ± 1.0V
108 MHz 108 MHz 7.8V ± 1.0V
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency Display Adjusting
98.00 MHz 98.00 MHz VR351
(30 dBµV)
• FM Detection
Signal generator: 10.7 MHz FM sweep generator
Test Frequency Frequency
Stage Display
FM IF 10.7 MHz 98.00 MHz
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Frequency Frequency
Stage Display
FM OSC. — 87.50 MHz
FM RF 98.00 MHz 98.00 MHz
(10 ~ 20dB)
*1. Input: Antenna Output: 18 Pin of IC303
Setting/ Instrument
Display Adjusting Connection
Parts
T351 *1
(fL): T306 *2
1.1 ± 0.1 V
T302 *3
Output: TP-VT(IC301 28Pin)
Check Instrument
Point Connection
TP-VT
TP-VT
Instrument
Parts Connection
Input: Antenna
Output: Speaker Terminal
Setting/ Instrument
Adjusting Connection
Parts
T304 Input: Pin 1 of
IC301
Output: Pin 18
of IC303
Setting/ Instrument
Adjusting Connection
Parts
(fL): L303 *1
3.4 ± 0.1 V
L302 *1
T351
AM IF
IC303
TP302
Figure 1 ADJUSTMENT POINTS
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.
Each time a disc is changed, these adjustments are performed
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
2 – 1
TUNER PWB-A2
20
TP301
C393
L303
FM OSC.
VR351
FM MUTE
LEVEL
T304
FM IF
CNP301
L302
FM RF
T302
T306
AM
AM BAND
Tracking fL
COVERAGE fL