CD-BA2000 (serv.man5). (updated July 2001) - Sharp Audio Service Manual (repair manual)

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SAFETY PRECAUTION FOR SERVICE MANUAL ...........................................................................................................  2
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) ..........................................................................................................  2
SPECIFICATIONS .............................................................................................................................................................  3
NAMES OF PARTS ...........................................................................................................................................................  4
OPERATION  MANUAL .....................................................................................................................................................  6
QUICK GUIDE (FOR U.K. ONLY) ......................................................................................................................................  7
DISASSEMBLY ..................................................................................................................................................................  9
REMOVING AND REINSTALLING THE MAIN PARTS ...................................................................................................  12
ADJUSTMENT .................................................................................................................................................................  13
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  19
WAVEFORMS OF CD CIRCUIT ......................................................................................................................................  20
BLOCK DIAGRAM ...........................................................................................................................................................  21
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................. 24
VOLTAGE ........................................................................................................................................................................  42
TROUBLESHOOTING .....................................................................................................................................................  43
FUNCTION TABLE OF IC ................................................................................................................................................  47
FL DISPLAY ...................................................................................................................................................................... 53
WIRING OF PRIMARILY SUPPLY LEADS (FOR U.K. ONLY) ........................................................................................  54
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING METHOD (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.

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
Prefomers Protection Act 1956, the Preformers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.

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The AEL (Accessible Emission Level) of Laser Power Output
for this model is specified to be lower than Class I 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.

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 buzzor sounds.

SHORT-CIRCUIT
AC POWER 
SUPPLY CORD

CONNECT THE PROBE
TO GND 

OF CHASSIS

SCREW

 PROBE

AC

UNIT

WITHSTANDING
VOLTAGE TESTER

+

-

OUT

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.

LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT

CHASSIS SCREW

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●

AC 230 V, 50 Hz

154 W

Width; 270 mm (10-5/8")
Height; 330 mm (13")
Depth; 355 mm (14")

8.7 kg (19.2 lbs.)

●

RMS; 200 W (100 W + 100 W )
            (10%  T.H.D)
            [Main  speaker  (woofer,
      tweeter and super tweeter);
            80  W  (40  W  +  40  W),
            Subwoofer; 
      120 W (60 W + 60 W)]
RMS; 184 W (92 W + 92 W )
            (0.9%  T.H.D)
            [Main  speaker  (woofer,
      tweeter and super tweeter);
            74  W  (37  W  +  37  W),
            Subwoofer; 
      110 W (55 W + 55 W)]

Speakers; 6 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)

Video/Auxiliary (audio signal);
500 mV/47 kohms

●

3-disc multi-play compact
disc player

Non-contact, 3-beam semi-
conductor laser pickup

1-bit D/A converter

20 - 20,000 Hz

90 dB (1 kHz)

●

FM; 87.5-108 MHz
AM; 522-1,620 kHz

●

50-14,000 Hz (Normal tape)

55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/playback)

0.3 % (WRMS)

●

4-way type [13 cm (5-1/4") sub-
woofer, 13 cm (5-1/4") woofer, 
5 cm (2") tweeter and super tweeter]

200 W

100 W

6 ohms

Width; 270 mm (10-5/8")
Height; 330 mm (13")
Depth; 264.6 mm (10-3/8")

4.7 kg (10.3 lbs.)/each

PMPO; 668 W
MPO; 334 W (167 W + 167 W )
(DIN 45 324)
[Main speaker (woofer, tweeter
and super tweeter);
134 W (67 W + 67 W),
Subwoofer; 
200 W (100 W + 100 W)]
RMS; 200 W (100 W + 100 W )
(DIN 45 324)
[Main speaker (woofer, tweeter
and super tweeter);
80 W (40 W + 40 W),
Subwoofer; 
120 W (60 W + 60 W)]
RMS; 184 W (92 W + 92 W )
(DIN 45 500)
[Main speaker (woofer, tweeter
and super tweeter);
74 W (37 W + 37 W),
Subwoofer; 
110 W (55 W + 55 W)]

0.35 % (DIN 45 511, playback)

Specifications for this model are subject to change without
prior notice.

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.

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