SD-SG11 (serv.man7) - Sharp Audio Service Manual (repair manual)

sd-sg11 (serv.man7) service manual
Model
SD-SG11 (serv.man7)
Pages
68
Size
4.32 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
sd-sg11-sm7.pdf
Date

Read Sharp SD-SG11 (serv.man7) Service Manual online

SD-SG11H
SERVICE MANUAL
SHARP  CORPORATION
No. S8154SDSG11H/
 • 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.
The power of this unit is supplied from the amplifying unit via the
system connection cable. It does not operate by itself.
The Service Manual is for the SD-SG11H, which is a minor-modification model of the SD-NX10H. This manual, therefore, describes only the
changed points from the service manual. Please refer to the SD-NX10H service manual (S2109SDNX10H/) together with this manual.
SD-NX10H
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) ...........................................................................................................................................  3
REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................................................  18
WIRING PROCESS DIAGRAM ........................................................................................................................................................................  22
ADJUSTMENT ..................................................................................................................................................................................................  22
ERROR MESSAGE LIST ..................................................................................................................................................................................  32
EEPROM WRITING PROCEDURE ..................................................................................................................................................................  33
DESCRIPTION OF CIRCUIT FOR 1-BIT UNIT ................................................................................................................................................  35
TO CHECK AND CANCEL PROTECT CIRCUIT DETECTION LINE ...............................................................................................................  36
TEST MODE .....................................................................................................................................................................................................  37
WAVEFORMS OF 1-BIT CIRCUIT ...................................................................................................................................................................  78
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................................................  79
CD OPTICAL PICKUP LENS CLEANING ........................................................................................................................................................  81
TROUBLESHOOTING ......................................................................................................................................................................................  82
FUNCTION TABLE OF IC .................................................................................................................................................................................  86
FL DISPLAY ....................................................................................................................................................................................................  100
 CONTENTS
Page
SAFETY PRECAUTION FOR  SERVICE MANUAL ..........................................................................................................  2
SPECIFICATIONS .............................................................................................................................................................  3
NAMES OF PARTS ...........................................................................................................................................................  4
OPERATION MANUAL ......................................................................................................................................................  6
DISASSEMBLY ................................................................................................................................................................  13
ADJUSTMENT .................................................................................................................................................................  16
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  17
TYPES OF TRANSISTOR AND LED ...............................................................................................................................  17
BLOCK DIAGRAM ...........................................................................................................................................................  18
WIRING SIDE OF P.W.BOARD .......................................................................................................................................  25
SCHEMATIC DIAGRAM ..................................................................................................................................................  36
VOLTAGE ........................................................................................................................................................................  50
FUNCTION TABLE OF IC ................................................................................................................................................  51
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
SD-SG11H
MODEL
1-BIT DIGITAL AUDIO COMPONENT
SD-SG11H
– 2 –
SAFETY PRECAUTION FOR
SERVICE MANUAL
The AEL (ACCESSIBLE EMISSION 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
(SW1932) is turned on and then PLAY SW (SW1934
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 preset before shipment.
    Do not attempt to readjust 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.
(For U.K.)
(Except for U.K.)
Laser Diode Properties
Material: GaAIAs
Wavelength: 785 nm
Pulse time:
Read mode: 0.8 mW Continuous
Write mode: max 10 mW 0.5S
min cycle 1.5S
Repetition
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA MAI
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.
CAUTION - INVISIBLE  LASER  RADIATION  WHEN  OPEN  AND  INTERLOCKS  
DEFEATED AVOID  EXPOSURE  TO  BEAM . 
VARNING - OSYNLIG  LASERSTRÅLNING  NÄR  DENNA  DEL  ÄR  ÖPPNAD  OCH  
SPÄRRAR ÄR  URKOPPLADE.  STRÅLEN  ÄR  FARLIG.
ADVARSEL - USYNLIG  LASERSTRÅLING  NÅR  DEKSEL  ÅPNES  OG  SIKKERHEDSLÅS
BRYTES.  UNNGÅ  EKSPONERING  FOR  STRÅLEN.
VARO!  AVATTAESSA  JA  SUOJALUKITUS  OHITETTAESSA  OLET  ALTTIINA
NÄKYMÄTÖN  LASERSÄTEILYLLE.  ÄLÄ  KATSO  SÄTEESEN.
VARNING - OSYNLIG  LASERSTRÅLING  NÄR  DENNA  DEL  ÄR  ÖPPNAD  OCH  SPÄRREN
ÄR  URKOPPLAD.  BETRAKTA  EJ  STRÅLEN.
ADVARSEL - USYNLIG  LASERSTRÅLING  VED  ÅBNING  NÅR  SIKKERHEDSAFBRYDERE
ER  UDE  AF  FUNKTION.  UNDGÅ  UDSETTELSE  FOR  STRÅLING.
– 3 –
SD-SG11H
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. 3-1).
During this operation, the laser will leak from the opening between the magnetic head and cartridge holder (Fig. 3-2).
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 3-1
Magnetic Head
Optical Pickup
,,
Magnetic Head
Optical Pickup
Spindle Motor
Laser Beam
Cartridge Holder
Mechanism
Chassis
Figure 3-2
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
General
Power source
AC 230 V, 50 Hz
Power consumption
Power on: 54 W
Power stand-by: 0.6 W
Dimensions
MD/CD/tuner unit
Width: 318 mm (12-9/16") 
Height: 210 mm (8-5/16") 
Depth: 93 mm (3-11/16")
Amplifier unit
Width: 160 mm (6-5/16") 
Height: 210 mm (8-5/16") 
Depth: 153 mm (6)
Weight
MD/CD/tuner unit
3.7 kg (8.2 lbs.)
Amplifier unit
3.7 kg (8.2 lbs.)
Input/output terminals
MD/CD/tuner unit
Auxiliary  input: 500 mV/47 kohms
Digital input (optical)
System output (RCA)
Line output: 500 mV/47 kohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
System control (SD-SG11H amplifier unit only)
Amplifier unit
System input (RCA)
Speakers: 4 ohms
System control (SD-SG11H MD/CD/tuner unit only)
Amplifier
CD player
MiniDisc
Tuner
Amplification system
64fs 1-bit switching
(Remarks:fs = 44.1 kHz)
Rated output power
RMS: 50 W (25 W + 25 W) (DIN 45 324)
A/D noise shaping
7th-order       (delta - sigma) modulation
   
Type
1-disc slot-in type 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)
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
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)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Specifications for this model are subject to change without
prior notice.
SD-SG11H
– 4 –
NAMES OF PARTS
MD/CD/tuner unit front panel
1. CD Eject Button
2. CD Stop Button
3. CD Play/Pause Button
4. CD Fast Reverse/Tuning Down Button
5. CD Fast Forward/Tuning Up Button
6. MD Record Button
7. MD Stop Button
8. MD Play/Pause Button
9. MD Recording Level/MD Fast Reverse Button
10. MD +10 Track Up Button
11. MD Recording Level/MD Fast Forward Button
12. MD Eject Button
13. On/Stand-by Button
14. Tuner (Band) Button
15. Auxiliary Button
16. MD Record Mode Button
17. Erase Button
18. CD/MD Play Mode Select Button
19. Volume Up and Down Buttons
20. CD/MD Cover Open/Close Button
21. CD Compartment
22. MD Compartment
23. Timer Indicator
24. Sleep Indicator
25. Monaural Recording Indicator
26. Power Indicator
27. Stereo Recording Indicator
28. 2 times Long Recording (stereo) Indicator
29. 4 times Long Recording (stereo) Indicator
30. Remote Sensor
1 2 3
5
6
8
10 11
9
12
13 14 15
16 17 18 19
20
21
23
24
25
28 29
27
30
26
22
7
4
Multi-function LCD display
1. Level Meter/Character Information/Frequency Indicator
2. Function Indicator
3. Record Indicator
4. CD/MD Play Indicator
5. Top Position Indicator
6. RDS Indicator
7. Traffic Programme Indicator
8. Traffic Announcement Indicator
9. MD Record Pause Indicator
10. Dynamic PTY Indicator
11. CD/MD Repeat Indicator
12. EON Indicator
13. Programme Type Indicator
14. Traffic Information Indicator
15. Random Play Indicator
16. Programme Play Indicator
17. Sound Synchronised Recording Indicator
18. Track Edit Indicator
19. TOC Indicator
20. FM Stereo Indicator
21. FM Stereo Mode Indicator
22. Sleep Indicator
23. Timer Play/Recording Indicator
2
1
3
4
5
6
8
10
9
11 12 13 14
15
17 18
19
20
21
22
23
16
7
Page of 68
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Here you can read online and download Sharp SD-SG11 (serv.man7) Service Manual in PDF. SD-SG11 (serv.man7) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp SD-SG11 (serv.man7) System. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.