CD-BA250 (serv.man10) - Sharp Audio Service Manual (repair manual)

cd-ba250 (serv.man10) service manual
Model
CD-BA250 (serv.man10)
Pages
64
Size
3.93 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
cd-ba250-sm10.pdf
Date

Read Sharp CD-BA250 (serv.man10) Service Manual online

– 1 –
CD-BA250H/CD-BA2600H
No. S4126CDBA250H
 CONTENTS
Page
SAFETY PRECAUTION FOR  SERVICE MANUAL ........................................................................................................... 2
IMPORTANT SERVICE NOTES (CD-BA250H FOR U.K. ONLY) .....................................................................................  3
SPECIFICATIONS .............................................................................................................................................................  3
NAMES OF PARTS ...........................................................................................................................................................  4
OPERATION MANUAL ......................................................................................................................................................  6
DISASSEMBLY ................................................................................................................................................................  11
REMOVING AND REINSTALLING THE MAIN PARTS ...................................................................................................  14
ADJUSTMENT .................................................................................................................................................................  15
BLOCK DIAGRAM ...........................................................................................................................................................  19
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................. 22
VOLTAGE ........................................................................................................................................................................  38
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  39
TYPES OF TRANSISTOR AND LED ................................................................................................................................ 39
WAVEFORMS OF CD CIRCUIT ......................................................................................................................................  40
TROUBLESHOOTING .....................................................................................................................................................  41
FUNCTION TABLE OF IC ................................................................................................................................................  45
FL DISPLAY ...................................................................................................................................................................... 51
WIRING OF PRIMARILY SUPPLY LEADS (CD-BA250H FOR U.K. ONLY) .................................................................... 52
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING METHOD (CD-BA250H FOR U.K. ONLY)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
SERVICE MANUAL
SHARP CORPORATION
MINI COMPONENT SYSTEM
MODEL 
CD-BA250H
CD-BA250H Mini Component System consisting of
CD-BA250H (main unit) and CP-BA250H (speaker system).
MINI COMPONENT SYSTEM
MODEL 
CD-BA2600H
CD-BA2600H Mini Component System consisting of
CD-BA2600H (main unit) and CP-BA2600H (speaker system).
• Note for users in U.K.
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Performers Protection Act 1956, the Performers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
CD-BA250H/CD-BA2600H
– 2 –
SAFETY PRECAUTION FOR
SERVICE MANUAL
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 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 hazardous radiation exposure.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
CAUTION-INVISIBLE  LASER  RADIATION  WHEN  OPEN.  DO  NOT  STARE  INTO 
BEAM  OR  VIEW  DIRECTLY  WITH  OPTICAL  INSTRUMENTS.
VARNING-OSYNLIG  LASERSTRALNING  NAR  DENNA  DEL  AR  OPPNAD.  STIRRA
EJ  IN  I  STRALEN  OCH  BETRAKTA  EJ  STRALEN   MED  OPTISKA  INSTRUMENT.
ADVERSEL-USYNLIG  LASERSTRALING  VED  ABNING.  SE  IKKE  IND  I 
STRALEN-HELLER  IKKE  MED  OPTISKE  INSTRUMENTER.
VARO!  AVATTAESSA  OLET  ALTTIINA  NAKYMATON  LASERSATEILYLLE.
ALA  TUIJOTA  SATEESEEN  ALAKA  KATSO  SITA  OPTISEN  LAITTEEN  LAPI.
VARNING-OSYNLIG  LASERSTRALNING  NAR  DENNA  DEL  AR  OPPNAD.
STIRRA  EJ IN  I  STRALEN  OCH  BETRAKTA  EJ  STRALEN  GENOM  OPTISKT  
INSTRUMENT.
ADVERSEL-USYNLIG  LASERSTRALING  NAR  DEKSEL  APNES.  STIRR IKKE  
INN  I  STRALEN  ELLER  SE  DIREKTE  MED  OPTISKE  INSTRUMENTER.
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ
KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA ALTISTAA
KÄYTTÄJÄN TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE
LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN I DENNA
BRUKSANVISNING SPECIFICERAS. KAN ANVÄNDAREN UTSÄTTAS FÖR
OSYNLIG LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN FÖR
LASERKLASS 1.
(CD-BA250H for U.K. only)
(Except for U.K.)
– 3 –
CD-BA250H/CD-BA2600H
General
 
Amplifier (Except for U.K.)
 
CD player
Tuner
 
Cassette deck (Except for U.K.)
Power source
AC 230 V, 50 Hz
Power consumption
Power on: 124 W
Power stand-by: 0.6 W (*)
Dimensions
Width: 270 mm (10-5/8") 
Height: 330 mm (13") 
Depth: 340 mm (13-3/8")
Weight
6.7 kg (14.7 lbs.)
 ( * )
This power consumption value is obtained when the demonstration mode is 
cancelled in the power stand-by mode. cancel the demonstration mode.
Output power
PMPO: 480 W
MPO: 240 W (120 W + 120 W) (DIN 45 324)
RMS: 150 W (75 W + 75 W) (DIN 45 324)
RMS: 104 W (52 W + 52 W) (DIN 45 500)
Output terminals
Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Input terminals
Video/Auxiliary (audio signal): 500 mV/47 kohms
Type
3-disc multi-play 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)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Frequency response
50 - 14,000 Hz (Normal tape)
Signal/noise ratio
55 dB (TAPE 1, playback) 
50 dB (TAPE 2, recording/playback)
Wow and flutter
0.35 % (DIN 45 511)
Type
2-way type speaker system
 
5 cm (2") Tweeter
13 cm (5-1/4") Woofer
Maximum input power
150 W
Rated input power
75 W
Impedance
6 ohms
Dimensions
Width: 220 mm (8-11/16") 
Height: 330 mm (13") 
Depth: 217 mm (8-9/16")
Weight
3.0 kg (6.6 lbs.)/each
Amplifier (CD-BA250H for U.K.)
Cassette deck (CD-BA250H for U.K.)
Output power
RMS: 150 W (75 W + 75 W) (10 % T.H.D.)
RMS: 104 W (52 W + 52 W) (0.9 % T.H.D.)
Output terminals
Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)
Input terminals
Video/Auxiliary (audio signal): 500 mV/47 kohms
Frequency response
50 - 14,000 Hz (Normal tape)
Signal/noise ratio
55 dB (TAPE 1, playback) 
50 dB (TAPE 2, recording/playback)
Wow and flutter
0.3 % (WRMS)
SPECIFICATIONS
CD-BA250H/CD-BA2600H
IMPORTANT SERVICE NOTES (CD-BA250H 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.
Set name
set value
Withstanding Voltage Tester
Test voltage
4,240 VPEAK
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.
SHORT-CIRCUIT
AC POWER 
SUPPLY CORD
CONNECT THE PROBE
TO GND 
OF CHASSIS
SCREW
 PROBE
AC
UNIT
WITHSTANDING
VOLTAGE TESTER
+
-
OUT
CHASSIS SCREW
CP-BA250H/CP-BA2600H
Specifications for this model are subject to change without
prior notice.
CD-BA250H/CD-BA2600H
– 4 –
NAMES OF PARTS
CD-BA250H/CD-BA2600H
Front panel
1.  Disc Tray
2.  Timer Set Indicator
3.  On/Stand-by Button
4.  Tape 2 Cassette Compartment
5.  Tape 1 Cassette Compartment
6.  Equalizer Mode Select Button
7.  Volume Up and Down Buttons
8.  Extra Bass/Demo Mode Button
9.  Disc Tray Open/Close Button
10. Disc Skip Button
11. Tuning and Time Up Button
12. CD or Tape Stop Button
13. CD Button
14. RDS Programme Type/Traffic Information Search Button
15. RDS EON Button 
16. RDS ASPM (Auto Station Programme Memory) Button
17. Dimmer Button
18. Clock Button
19. Timer/Sleep Button
20. Headphone Socket
21. RDS Display Mode Selector Button
22. Video/Auxiliary Button
23. Tape (1 
 2) Button
24. Tuner (Band) Button
25. CD Play or Repeat, Tape Play Button
26. CD Track Up or Fast Forward, Tape 2 Fast Forward,
 Tuner Preset Up Button
27. Tuning and Time Down Button
28. Memory/Set Button
29. Tape 2 Record Pause Button
30. CD Track Down or Fast Reverse, Tape 2 Rewind,
 Tuner Preset Down Button
4
5
6
7
1
2
3
8
9
10
17
25
23
24
22
21
16
15
14
13
12
11
27
28 29
30
26
18
19
20
Display
1. RDS Indicator
2. Programme Type Indicator
3. Traffic Announcement Indicator
4. Extra Bass Indicator
5. FM Stereo Mode Indicator
6. Traffic Information Indicator
7. Traffic Programme Indicator
8. CD Play Indicator
9. FM Stereo Receiving Indicator
10. Dynamic PTY Indicator
11. EON Indicator
12. CD Repeat Play Indicator
13. CD Pause Indicator
14. Disc Number Indicators
15. Timer Play Indicator
16. Timer Recording Indicator
17. Tape 2 Record Indicator
18. Memory Indicator
19. Tape Play Indicator
20. Sleep Indicator
21. Spectrum Analyser/Volume Level Indicator
4
5
7
6
1 2 3
9 10 11 12 13
17
21
21
21
18 19
20
8
14
15
16
Page of 64
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Download Sharp CD-BA250 (serv.man10) Service Manual (Repair Manual)

Here you can read online and download Sharp CD-BA250 (serv.man10) Service Manual in PDF. CD-BA250 (serv.man10) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp CD-BA250 (serv.man10) 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.