Sharp XL-MP10H - Laser Handling Procedures; Safe Laser Operation Guidelines

XL-MP10H
2 – 1
AudioXL-MP10HService ManualXLMP10HMarketE
CHAPTER 2. ADJUSTMENTS
[1] ADJUSTMENT
1. MECHANISM SECTION
• Driving Force Check
• Torque Check
• Tape Speed
2. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• 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
• FM Detection
Signal generator: 10.7 MHz FM sweep generator
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
3. CD SECTION
• Adjustment
Since this CD system incorporates the following automatic adjust-
ment functions, readjustment is not needed when replacing the
pickup. Therefore, different PWBs and pickups can be combined
freely.
Each time a disc is changed, these adjustments are performed
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
Torque Meter Specified Value
Play: TW-2111 Over 80 g
Torque Meter Specified Value
Play: TW-2111 30 to 80 g.cm
Fast forward: TW-2231 70 to 180 g.cm
Rewind: TW-2231 70 to 180 g.cm
Test Tape Adjusting
Point
Specified
Value
Instrument
Connection
MTT-111 Variable
Resistor in
motor.
3,000 ± 30 Hz Speaker Ter-
minal (Load
resistance: 6
ohms)
Figure 1
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,602 kHz L305 *1
AM Band
Coverage
— 522 kHz (fL): L306
1.1 ± 0.1 V
*2
AM Tracking 990 kHz 990 kHz L302 *3
*1. Input: IC301 1Pin Output: IC301 23Pin
*2. Input: Input is not connected Output: TP-VT(IC301 28Pin)
*3. Input: Antenna Output:IC301 23Pin
Frequency Display Check
Point
Instrument
Connection
87.5 MHz 87.5 MHz 1.5V ± 1.0V TP-VT
108 MHz 108 MHz 5.0V ± 1.0V TP-VT
TAPE MECHANISM
VARIABLE RESISTOR
IN MOTOR
Frequency Display Adjusting
Parts
Instrument
Connection
98.00 MHz
(30 dBµV)
98.00 MHz Input: Antenna
Output: Speaker Terminal
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM IF 10.7 MHz 98.00 MHz Input: Pin 36 of
IC301
Output: Pin 23
of IC301
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM Band
Coverage
— 87.50 MHz (fL): L307
1.5 ± 0.1 V
*1
FM RF 98.00 MHz
(10 ~ 20dB)
98.00 MHz L304 *1
*1. Input: Antenna Output: 23 Pin of IC301
Figure 2 ADJUSTMENT POINTS
CNP301
L306
IC301
L304
FM RF
L302
L307
L305
MAIN PWB-A1
AM IF
AM ANT.
FM OSC.
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
TP-VT=28Pin
AM
Tracking