Read Sharp SD-CX1 (serv.man4) Service Manual online
SD-CX1H
CONTENTS
Page
SAFETY PRECAUTION OF MD SECTION FOR SERVICE MANUAL .............................................................................. 2
SAFETY PRECAUTION OF CD SECTION FOR SERVICE MANUAL .............................................................................. 3
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) .......................................................................................................... 3
SPECIFICATIONS ............................................................................................................................................................. 4
NAMES OF PARTS ........................................................................................................................................................... 5
OPERATION MANUAL ...................................................................................................................................................... 7
DISASSEMBLY ................................................................................................................................................................ 12
REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 15
DESCRIPTION OF CIRCUIT FOR 1-BIT AMP. UNIT ..................................................................................................... 17
TO CHECK AND CANCEL PROTECT CIRCUIT DETECTION LINE .............................................................................. 18
TEST MODE .................................................................................................................................................................... 19
ADJUSTMENT ................................................................................................................................................................. 24
ERROR MESSAGE LIST ................................................................................................................................................. 33
EEPROM WRITING PROCEDURE ................................................................................................................................. 34
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 37
TYPES OF TRANSISTOR AND LED ............................................................................................................................... 37
BLOCK DIAGRAM ........................................................................................................................................................... 38
SCHEMATIC DIAGRAM .................................................................................................................................................. 42
WIRING SIDE OF P.W.BOARD ....................................................................................................................................... 56
WAVEFORMS OF 1 BIT AMP. CIRCUIT ......................................................................................................................... 69
WAVEFORMS OF MD CIRCUIT ..................................................................................................................................... 70
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 72
TROUBLESHOOTING ..................................................................................................................................................... 74
FUNCTION TABLE OF IC ................................................................................................................................................ 83
FL DISPLAY .................................................................................................................................................................... 101
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
SAFETY PRECAUTION OF CD SECTION FOR SERVICE MANUAL .............................................................................. 3
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) .......................................................................................................... 3
SPECIFICATIONS ............................................................................................................................................................. 4
NAMES OF PARTS ........................................................................................................................................................... 5
OPERATION MANUAL ...................................................................................................................................................... 7
DISASSEMBLY ................................................................................................................................................................ 12
REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 15
DESCRIPTION OF CIRCUIT FOR 1-BIT AMP. UNIT ..................................................................................................... 17
TO CHECK AND CANCEL PROTECT CIRCUIT DETECTION LINE .............................................................................. 18
TEST MODE .................................................................................................................................................................... 19
ADJUSTMENT ................................................................................................................................................................. 24
ERROR MESSAGE LIST ................................................................................................................................................. 33
EEPROM WRITING PROCEDURE ................................................................................................................................. 34
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 37
TYPES OF TRANSISTOR AND LED ............................................................................................................................... 37
BLOCK DIAGRAM ........................................................................................................................................................... 38
SCHEMATIC DIAGRAM .................................................................................................................................................. 42
WIRING SIDE OF P.W.BOARD ....................................................................................................................................... 56
WAVEFORMS OF 1 BIT AMP. CIRCUIT ......................................................................................................................... 69
WAVEFORMS OF MD CIRCUIT ..................................................................................................................................... 70
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 72
TROUBLESHOOTING ..................................................................................................................................................... 74
FUNCTION TABLE OF IC ................................................................................................................................................ 83
FL DISPLAY .................................................................................................................................................................... 101
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
SERVICE MANUAL
SHARP CORPORATION
No. S2112SDCX1H//
• In the interests of user-safety the set should be restored to its original
condition and only parts identical to those specified should be used.
SD-CX1H(BL)
SD-CX1H(GR)
SD-CX1H(GR)
SD-CX1H 1-Bit Digital Audio System consisting of SD-CX1H (main
unit) and CP-CX1H (speaker system).
unit) and CP-CX1H (speaker system).
MODEL
1-BIT DIGITAL AUDIO SYSTEM
SD-CX1H
– 2 –
SAFETY PRECAUTION OF MD SECTION FOR SERVICE MANUAL
The AEL (Accessible Emisson Level) of the laser power output is less than class 1 but the laser component is capable of emitting radiation
exceeding the limit for Class 1. Therefore it is important that the following precautions are observer during servicing to protect your eyes
against exposure to the laser beam.
1) When the unit case cover is removed and LOADING SW (SW 1956) is turned on and then PLAY SW (SW 1954 mechanism PWB) is turned
exceeding the limit for Class 1. Therefore it is important that the following precautions are observer during servicing to protect your eyes
against exposure to the laser beam.
1) When the unit case cover is removed and LOADING SW (SW 1956) is turned on and then PLAY SW (SW 1954 mechanism PWB) is turned
on in a few second.
The laser will light for several second to detect a disk.
2) The laser power output of the pickup unit and replacement service parts are all factory pre-set before shipment.
Do not attempt to re-adjust the laser pickup unit during replacement or servicing.
3) Under no circumstances stare into the pickup lens at any time.
4) If laser optical unit becomes faulty, replace the complete laser optical unit.
5) CAUTION-Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous
2) The laser power output of the pickup unit and replacement service parts are all factory pre-set before shipment.
Do not attempt to re-adjust the laser pickup unit during replacement or servicing.
3) Under no circumstances stare into the pickup lens at any time.
4) If laser optical unit becomes faulty, replace the complete laser optical unit.
5) CAUTION-Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous
radiation exposure.
VARO !
Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING!
Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
Precaution to be taken when replacing and servicing the laser pickup.
The following precautions must be observed during servicing to protect your eyesvagainst exposure to the laser.
Warning of possible eye damage when repairing:
If the AC power plug is connected when the inner cover of the unit is removed, the laser will light up during focus access (about
1 second) (Fig. 2-1).
During this operation, the laser will leak from the opening between the magnetic head and cartridge holder (Fig. 2-2).
In order to protect your eyes, you must not look at the laser during repair.
Before repairing, be sure to disconnect the AC power plug.
The following precautions must be observed during servicing to protect your eyesvagainst exposure to the laser.
Warning of possible eye damage when repairing:
If the AC power plug is connected when the inner cover of the unit is removed, the laser will light up during focus access (about
1 second) (Fig. 2-1).
During this operation, the laser will leak from the opening between the magnetic head and cartridge holder (Fig. 2-2).
In order to protect your eyes, you must not look at the laser during repair.
Before repairing, be sure to disconnect the AC power plug.
Figure 2-1
Figure 2-2
Magnetic Head
Optical Pickup
,,
Magnetic Head
Optical Pickup
Spindle Motor
Laser Beam
Cartridge Holder
Mechanism
Chassis
Chassis
WARNINGS
Laser Diode Properties
●
Material: GaAlAs
●
Wavelength: 785 nm
●
Pulse time:
Read mode: 0.8 mW Continuous
Write mode: max 10 mW 0.5S
Read mode: 0.8 mW Continuous
Write mode: max 10 mW 0.5S
min cycle 1.5S
Repetition
Repetition
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA MAI
NITULLA TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1
YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
NITULLA TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1
YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN I DENNA BRUKSANVISNI
NG SPECIFICERAS. KAN ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG LASERSTRÅLNING,
SOM ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.
NG SPECIFICERAS. KAN ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG LASERSTRÅLNING,
SOM ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.
CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED
AVOID EXPOSURE TO BEAM .
AVOID EXPOSURE TO BEAM .
VARNING - OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR
ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
ADVARSEL - USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS
BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VARO! AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA
NÄKYMÄTÖN LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEN.
NÄKYMÄTÖN LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEN.
VARNING - OSYNLIG LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN
ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVARSEL - USYNLIG LASERSTRÅLING VED ÅBNING NÅR SIKKERHEDSAFBRYDERE
ER UDE AF FUNKTION. UNDGÅ UDSETTELSE FOR STRÅLING.
ER UDE AF FUNKTION. UNDGÅ UDSETTELSE FOR STRÅLING.
– 3 –
SD-CX1H
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser
beam.
(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser
beam.
(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer
than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to
shipping.
(3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup Lens at any time.
(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in
(4) Under no circumstances look directly into the Pickup Lens at any time.
(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
(For U.K.)
(Except for U.K.)
WARNINGS
SAFETY PRECAUTION OF CD SECTION FOR SERVICE MANUAL
IMPORTANT SERVICE NOTES (FOR U.K. ONLY)
Before returning the unit to the customer after completion of a
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.
Set name
set value
Withstanding Voltage Tester
Test voltage
4,240 VPEAK
3,000 VRMS
3,000 VRMS
Set time
6 secs
Set current (Cutoff current)
4 mA
Unit
Judgment
OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzer sounds.
NG: The “NG” lamp lights and the buzzer sounds.
PROBE
AC
OUT
UNIT
SHORT-CIRCUIT
AC POWER
SUPPLY CORD
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
TO GND OF CHASSIS
SCREW
WITHSTANDING
VOLTAGE TESTER
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
SD-CX1H
– 4 –
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
TO THE OPERATION MANUAL.
SPECIFICATIONS
SD-CX1H
Specifications for this model are subject to change without prior notice.
CP-CX1H
General
Amplifier
CD player
Power source
AC 230 V, 50 Hz
Power consumption
Power on: 42 W
Power stand-by: 0.6 W (*)
Power stand-by: 0.6 W (*)
Dimensions
Width: 330 mm (13")
Height: 208 mm (8-3/16")
Depth: 190 mm (7-1/2")
Height: 208 mm (8-3/16")
Depth: 190 mm (7-1/2")
Weight
5.0 kg (11 lbs.)
( * )
This power consumption value is obtained when the demonstration mode is can-
celled in the power stand-by mode. Cancel the demonstration mode.
celled in the power stand-by mode. Cancel the demonstration mode.
Amplification system
64fs 1-bit switching
(Remarks: fs = 44.1 kHz)
(Remarks: fs = 44.1 kHz)
Rated output power
RMS: 40 W (20 W + 20 W) (DIN 45 324)
A/D noise shaping
7th-order (delta - sigma) modulation
Output terminals
Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Input terminals
Auxiliary: 500 mV/47 kohms
Type
1-disc vertical compact disc player
Signal readout
Non-contact, 3-beam semiconductor laser pickup
D/A converter
1-bit D/A converter
Frequency response
20 - 20,000 Hz
Dynamic range
90 dB (1 kHz)
MiniDisc
Tuner
Type
MiniDisc Recorder
Signal readout
Non-contact, 3-beam semiconductor laser pickup
Rotation speed
400 - 900 rpm CLV, Approx.
Error correction
ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Quantization
20-bit linear (A/D converter)
Coding
ATRAC (Adaptive TRansformed Acoustic Coding),
ATRAC 3
ATRAC 3
Sampling frequency
44.1 kHz
Recording method
Magnetic modulation overwrite method
Frequency response
20 - 20,000 Hz
D/A converter
1-bit D/A converter
Wow and flutter
Unmeasurable (less than 0.001% W. peak)
Signal/noise ratio
95 dB (1 kHz)
Dynamic range
90 dB (1 kHz)
Audio channel
Stereo: 2 channels (SP, LP2, LP4)
Monaural: 1 channel (MONO)
Monaural: 1 channel (MONO)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
AM: 522 - 1,620 kHz
Type
2-way type speaker system
2 cm (13/16") Tweeter
12 cm (4-3/4") Woofer
2 cm (13/16") Tweeter
12 cm (4-3/4") Woofer
Maximum input power
40 W
Rated input power
20 W
Impedance
6 ohms
Dimensions
Width: 170 mm (6-3/4")
Height: 300 mm (11-13/16")
Depth: 186 mm (7-3/8")
Height: 300 mm (11-13/16")
Depth: 186 mm (7-3/8")
Weight
2.0 kg (4.4 lbs.)/each
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