Sharp XL-MP9H Service Manual

XL-MP9H
2 – 1
XL-MP9H
Service Manual
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
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1.Adjiust so that an output signal appears.
• Setting the Test Mode
Keeping the REW/REV button and BASS/TREBLE button pressed,
turn on POWER. Then, the frequency is initially set in the memory
as shown in Table. Call it with the PRESET button to use it for
adjustment and check of tuner circuit.
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,602 kHz T351 *1
AM Band
Coverage
— 531 kHz (fL): T306
1.1 ± 0.1 V
*2
AM Tracking 990 kHz 990 kHz T302 *3
*1. Input: Antenna Output: Speaker terminal
*2. Input: Input is not connected Output: TP301(IC302 20Pin)
Frequency Display Check
Point
Instrument
Connection
87.5 MHz 87.5 MHz 2.2V ± 1.0V TP301
108 MHz 108 MHz 7.3V ± 1.0V TP301
Frequency Display Adjusting
Parts
Instrument
Connection
98.00 MHz
(30 dBµV)
98.00 MHz VR351*1 Input: CNP301
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
MAIN PWB-A1
Preset No. BAND FM STEREO
1 FM STEREO FM 87.50 MHz
2 FM 108.00 MHz
3 FM 98.00 MHz
4 FM 90.00 MHz
5 FM 106.00 MHz
6 AM AM 522 kHz
7 AM 1620 kHz
8 AM 990 kHz
9 AM AM 603 kHz
11~25 —————
26 FM MONO FM 106.00 MHz
27 FM 90.00 MHz
28 FM 98.00 MHz
29 FM 108.00 MHz
30 FM 87.50 MHz

Sharp XL-MP9H Specifications

General

Brand	Sharp
Model	XL-MP9H
Category	Stereo System
Language	English