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Model
XL-40
Pages
60
Size
2.19 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
xl-40.pdf
Date

Sharp XL-40 Service Manual ▷ View online

– 9 –
XL-40H/50H
MECHANISM SECTION
• Driving Force Check
Torque Meter
Specified Value
Play: TW-2412
Over 80 g
• Torque Check
Torque Meter
Play: TW-2111
30 to 60 g. cm
Fast forward: TW-2231
55 to 140 g.cm
Rewind: TW-2231
55 to 140 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
ADJUSTMENT
Specified Value
• Tape Speed
Figure 9-1 ADJUSTMENT POINT
TUNER SECTION
Figure 9-2 ADJUSTMENT POINTS
MAIN PWB
FM
ANTENNA
SOCKET
T351
R336
CNP301
AM
ANTENNA
SOCKET
FE301
VR351
FM Mute
Level
AM IF
TP301
SO301
T302
AM
Tracking fL
T306
AM Band
Coverage fL
MTT-111
Variable
3,000 
±
Headphone
resistor in
90 Hz
terminal
motor.(M901)
TAPE MECHANISM
M901
Tape
Motor
Variable
resistor
Adjusting
Parts
Display
Frequency
• Setting the Test Mode
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on POWER. Then, the frequency is initially set
in the memory as shown in Table. Call it with the JOG DIAL
knob to use it for adjustment and check of tuner circuit.
Preset No.
FM
Preset No.
AM
1
87.50 MHz
6
522 kHz
2
108.00 MHz
7
1,620 kHz
3
98.00 MHz
8
990 kHz
4
90.00 MHz
9
603 kHz
5
106.00 MHz
10
1,404 kHz
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Adjust so that an output signal appears.
Check Point
Instrument
Connection
Display
Frequency
87.5 MHz
87.5 MHz
2.2 V 
±
 0.7 V
TP301
108 MHz
108 MHz
7.3 V 
±
 1.0 V
TP301
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz
98.00 MHz
VR351*1
Input: SO301
(30 dB
µ
V)
Output: Speaker
Terminal
Instrument
Connection
*1. Input: Antenna,
Output: Speaker Terminal
*2. Input: Input is not connected,
Output: TP301
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF
450 kHz
1,620 kHz
T351
*1
 AM Band
522 kHz
(fL): T306
*2
Coverage
1.1 
±
 0.1 V
AM
990 kHz
990 kHz
(fL): T302
*1
Tracking
fL: Low-renge frequency
fH: High-renge frequency
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
XL-40H/50H
– 10 –
(Continued)
LIGHT M:
Classical Musical for general, rather
than specialist appreciation. Exam-
ples of music in this category are in-
strumental music, and vocal or cho-
ral works.
CLASSICS: Performances of major orchestral
works, symphonies, chamber music,
etc., and including Grand Opera.
OTHER M:
Musical styles not fitting into any of
the other categories. Particularly
used for specialist music of which
Rhythm & Blues and Reggae are
examples.
WEATHER: Weather reports and forecasts and
meteorological information.
FINANCE:
Stock Market reports, commerce,
trading, etc.
CHILDREN: For programmes targeted at a young
audience, primarily for entertainment
and interest, rather than where the
objective is to educate.
SOCIAL:
Programmes about people and things
that influence them individually or in
groups. Includes: sociology, history,
geography, psychology and society.
RELIGION: Any aspect of beliefs and faiths, in-
volving a God or Gods, the nature of
existence and ethics.
PHONE IN: Involving members of the public ex-
pressing their views either by phone
or at a public forum.
TRAVEL:
Features and programmes con-
cerned with travel to near and far
destinations, package tours and
travel ideas and opportunities. Not for
use for announcements about prob-
lems, delays, or road-works affecting
immediate travel where TP/TA should
be used.
LEISURE:
Programmes concerned with recrea-
tional activities in which the listener
might participate. Examples include,
Gardening, Fishing, Antique collect-
ing, Cooking, Food & Wine, etc.
JAZZ:
 Polyphonic, syncopated music char-
acterised by improvisation.
COUNTRY: Songs which originate from, or con-
tinue the musical tradition of the
American Southern States. Charac-
terised by a straightforward melody
and narrative story line.
NATION M: Current Popular Music of the Nation
or Region in that country’s language,
as opposed to international ‘Pop’
which is usually US or UK inspired
and in English.
OLDIES:
Music from the so-called “golden age”
of popular music.
FOLK M:
Music which has its roots in the mu-
sical culture of a particular nation,
usually played on acoustic instru-
ments. The narrative or story may be
based on historical events or the peo-
ple.
DOCUMENT: Programme concerned with factual
matters, presented in an investigative
style.
TEST:
Broadcast when testing emergency
broadcast equipment or receivers.
ALARM:
Emergency announcement made un-
der exceptional circumstances to give
warning of events causing danger of
a general nature.
NONE:
No programme type (receive only).
TP:
Broadcasts which carry traffic an-
nouncements.
TA:
Traffic announcements are being
broadcast at present.
Note:
When the unit is in the EON stand-by mode and
a programme is selected, the unit will display “TI”
instead of “TP” or “TA”.
3
4
2
7
1
5
6
11
10
14
15
12
13
16
9
8
Vdda
Vssa
MPXIN
TEST
TEST
CLK(4.332MHz)
OSC
XIN
XOUT
RDS-ID/
READY
RST
MODE
RDCL
RDDA
Vssd
Vddd
PLL
(57kHz)
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
RAM
(128-bits)
RDS-ID
DETECT
REFERENCE
VOLTAGE
ANTIALISING
FILTER
57kHz
BPF
(SCF)
SMOOTHING
FILTER
VREF
VREF
FLOUT
CIN
IC521  VHiLC72723M-1: RDS Circuit (LC72723M)
1
VREF
Reference voltage output (Vdda/2).
2
MPXIN
Baseband (multiplexed) signal input.
3
Vdda
Analog power supply (+5V).
4
Vssa
Analog ground.
5
FLOUT
Subcarrier output (filter output).
6
CIN
Subcarrier input (comparator input).
7
TEST
Test input.
8
XOUT
Crystal oscillator output (4.332MHz).
9
XIN
Crystal oscillator input (external reference signal input).
10
Vssd
Digital ground.
11*
Vddd
Digital power supply (+5V).
12
MODE
Read mode setting (0 : master, 1: slave).
13
RST
RDS-ID/RAM reset (positive polarity).
14
RDDA
RDS data output.
15*
RDCL
RDS clock output (master mode)/ RDS clock input (slave mode).
16*
RDS-ID/
RDS-ID/READY output (negative polarity).
READY
Pin
No.
Port
Name
Function
RDS
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not
connected to the outside.
RDS (Radio Data System) OPERATION
RDS is a broadcasting service which a growing
number of FM stations are now providing. It allows
these FM stations to send additional signals along
with their regular programme signals. For exam-
ple, the stations send their station names, and in-
formation about what type of programme they
broadcast, such as sports or music, etc.
When tuned to an FM station providing the RDS
service, RDS will appear, the station frequency (and
then the station name if sent) will be displayed.
The TP (Traffic Programme) will appear on the dis-
play when the received broadcast carries traffic an-
nouncements, and the TA (Traffic Announcement)
will appear whilst a traffic announcement is being
received.
EON will appear whilst the EON (Enhanced Other
Networks information) data is being broadcast.
Note:
When the TP and TA appear at the same time, an
announcement is being made.
When only the TA appears, an announcement is
not being made.
Information Provided by RDS
With the XL-40H/XL-50H, you can display two types
of RDS service. To show them in the display, press
the DISPLAY MODE button.
Each time you press the DISPLAY MODE button,
the display will change to show the following in-
formation.
Station names commonly 
known will be displayed.
"NO PS" appears if no 
signal is being received.
Programme type will be 
displayed.
"NO PTY" appears if no 
signal is being received.
Station frequencies.
PS 
(Programme Service): 
PTY 
(Programme Type): 
Station Frequency:
Descriptions of the PTY (Programme Type)
codes, TP (Traffic Programme) and TA (Traffic
Announcement)
With the XL-40H/XL-50H, you can search for and
receive the following PTY, TP and TA signals.
NEWS:
Short accounts of facts, events and
publicly expressed views, reportage
and actuality.
AFFAIRS:
Topical programme expanding or en-
larging upon the news, generally in
different presentation style or con-
cept, including debate, or analysis.
INFO:
Programmes whose purpose is to im-
part advice in the widest sense.
SPORT:
Programme concerned with any as-
pect of sport.
EDUCATE:
Programme intended primarily to
educate, of which the formal element
is fundamental.
DRAMA:
All radio plays and serials.
CULTURE:
Programmes concerned with any as-
pect of national or regional culture,
including language, theatre, etc.
SCIENCE:
Programmes about the natural sci-
ences and technology.
VARIED:
Used for mainly speech-based pro-
grammes usually of light-entertain-
ment nature, not covered by other
categories. Examples include: quiz-
zes, panel games, personality inter-
views.
POP M:
Commercial music, which would gen-
erally be considered to be of current
popular appeal, often featuring in cur-
rent or recent record sales charts.
ROCK M:
Contemporary modern music, usually
written and performed by young mu-
sicians.
EASY M:
Current contemporary music consid-
ered to be “easy-listening”, as op-
posed to Pop, Rock or Classical, or
one of the specialised music styles,
Jazz, Folk or Country. Music in this
category is often but not always, vo-
cal, and usually of short duration.
DISPLAY
MODE
– 11 –
XL-40H/50H
2. CD Test Mode (TEST 1)
In the CD test mode the operation of each step is enabled even when the LID-SW is off. However, if focus cannot be set in step
3 or any error processing is started, it is impossible to proceed to the next step. When the error processing is started, operations
other than termination of test mode by pressing the POWER button or return to the step 1 by pressing the STOP button are inhibited.
1. Step 1 Mode
When the CD test mode is turned on, the following indication lights, the processing (until turning-off of CD STB terminal of CD
initialization operation flow) is executed, and the next button input is waited.
After lighting for one second
If the following operation buttons are pressed in this state, the operation is performed as follows.
"POWER" ................. The test mode is turned off, the power is turned off, and the ordinary standby mode is set.
"FF/FWD" ................. After the pickup returns once to the innermost periphery, it slides toward the outer periphery while this
button is held down.
"REW/REV" .............. After the pickup returns once to the innermost periphery, it slides toward the inner periphery while this
button is pressed. However, if PU-IN is on, input is invalid.
"PLAY" ..................... Shift to step 2
"STOP" ..................... Invalid
"REC PAUSE" .......... Shift to step 5
* In case of initialization the pickup is moved toward the inner periphery. Any buttons other than "POWER" button are not
accepted until the shift of pickup to the inner periphery is completed at this time. If PU-IN SW ON cannot be detected within
10 seconds, the slide motor is stopped, and the following error indication appears. Press the POWER button to end the test
mode, or press the STOP button to return to step 1. Any other operations are inhibited.
TEST MODE
The test mode applied to this microcomputer has three modes, namely ordinary test mode to be used for adjustment or
measurement, aging test mode to be used for aging test, and self-diagnosis test mode for self-inspection in case of final product
inspection.
The test mode specification prescribes the microcomputer with RDS (RH-IX0026SJZZ) . There are two types of indication
examples; large ones for the microcomputer with RDS, and smaller ones for the microcomputer without RDS.
1.  Turning on the test mode
To turn on the specific test mode, press the POWER button, holding down the following two buttons in the ordinary stand-by
mode (power off state). In this case only the main unit button is valid. Even when the POWER of remote control button is set
to on, the test mode is not turned on.
[Ordinary test mode]
1. CD  Test Mode (TEST 1)…………………… Volume/JOG Dial Selector + FF/FWD
2. Tuner Test Mode (TEST 2)………………… Volume/JOG Dial Selector + Volume Select
3. Electronic volume Test Mode (TEST 3)…… REW/REV + FF/FWD
4. Timer Test Mode (TEST 4)………………… FUNCTION + Volume Select
5. LCD Test Mode (TEST 5)…………………… FUNCTION + FF/FWD
REW/REV + Volume Select
[Self-diagnosis Test Mode]
1.  Button input diagnosis test mode (TEST6).…
XL-40H/50H
– 12 –
The time display indicates always "0:00".
When the following buttons are pressed in this state, the operation is executed as follows.
"POWER" ................ The test mode is turned off, the power is turned off, and the ordinary standby mode is set.
"FF/FWD" ................ The pickup slides toward the outer periphery while this button is held down.
"REW/REV" ............. The pickup slides toward the inner periphery while this button is held down. However, if PU-IN is on, input
is invalid.
"PLAY" ..................... Shift to step 5
"STOP" .................... Return to step 1
"REC PAUSE" ......... Shift to step 5
*If the focus is disturbed, the process returns to step 1.
4. Step 4 Mode
The CLV servo ON command (8600) sending operation is performed, and the next button input is waited. (The disc is rotated
to perform CLV locking.)
When the following operation buttons are pressed in this state, the operation is executed as follows.
"POWER" ................ The test mode is turned off, the power is turned off, and the ordinary standby mode is set.
"FF/FWD" ................ The pickup slides toward the outer periphery while this button is held down.
"REW/REV" ............. The pickup slides toward the inner periphery while this button is held down. However, if PU-IN is on, input
is invalid.
"PLAY" ..................... If the focus has been set, shift to step 4 is executed. If the focus has not been set, acceptance is inhibited.
"STOP" .................... Return to step 1
"REC PAUSE" ......... Shift to step 5
*If the focus is disturbed after it has been set, the process returns to step 1.
3. Step 3 Mode
The laser is kept lighting. The processing (until turning-on of CLV servo of CD initialization operation flow) is executed, and
the next button input is waited. (The focus servo is turned on, and focus search is performed.)
The focus search is repeated until the focus is set.
If the following buttons are pressed in this state, the operation is performed as follows.
"POWER" ................ The test mode is turned off, the power is turned off, and the ordinary standby mode is set.
"FF/FWD" ................ The pickup slides toward the outer periphery while this button is held down.
"REW/REV" ............. The pickup slides toward the inner periphery while this button is held down. However, if PU-IN is on, input
is invalid.
"PLAY" ..................... Shift to step 3
"STOP" .................... Return to step 1
"REC PAUSE" ......... Shift to step 5
2. Step 2 Mode
When the "PLAY" button is pressed in this mode, the laser lighting command LDON (8400) is sent, and the laser is turned on.
Other operations are not performed.
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