QT-CD132H - Sharp Audio Service Manual (repair manual)

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Page

SAFETY PRECATION FOR SERVICE MANUAL ..............................................................................................................  2
IMPORTANT SERVICE NOTES (131H FOR UK ONLY) ..................................................................................................  3
SPECIFICATIONS .............................................................................................................................................................  3
NAMES OF PARTS ...........................................................................................................................................................  4
DISASSEMBLY ..................................................................................................................................................................  5
REMOVING AND REINSTALLING THE MAIN PARTS .....................................................................................................  6
ADJUSTMENT ...................................................................................................................................................................  7
BLOCK DIAGRAM .............................................................................................................................................................  9
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................  12
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  21
TYPES OF TRANSISTOR ...............................................................................................................................................  21
WAVEFORMS OF CD CIRCUIT ......................................................................................................................................  22
TROUBLESHOOTING (CD SECTION) ...........................................................................................................................  23
FUNCTION TABLE OF IC ................................................................................................................................................  26
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (131H FOR UK ONLY)

• 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.

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.

SURROUND

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The ael (ACCESSIBLE EMMISSION 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 cabinet is removed, the power is turned on

without a compact disc in position and the pick-up is on the
outer edge the laser will light for several seconds to detect
a disc. Do not look into the pick-up lens.

(2) The laser power output of the pick-up unit and replacement

service parts are all factory pre-set before shipment.

Do not attempt to re-adjust the laser pick-up unit during
replacement or servicing.

(3) Under no circumstances stare into the pick-up lens at any

time.

(4) CAUTION-USE of controls or adjustments, or pereformance

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.

LASER KLASSE 1

LUOKAN 1 LASERLAITE

KLASS 1 LASERAPPARAT

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

AC 230 - 240V, 50 Hz
DC 12 V [ "D" size (UM/SUM-1,
R20 or HP-2) battery x 8]
DC 3 V ["AA" size (UM/SUM-3, R6 or
HP-7) battery x 2 for tuner  memory]

Power consumption: 11 W
Output power:

PMPO; 28 W (total)

(131H Except for UK/ MPO; 8.4 W (4.2 W + 4.2 W)
132H)

(AC operation, DIN 45 324)
RMS; 4.6 W (2.3 W + 2.3 W)
(DC operation, DIN 45 324)

MPO (Max.); 8.4W (4.2 W + 4.2 W)

(AC operation)
RMS; 4.6 W (2.3 W +2.3 W)
(DC operation, 10 % T.H.D.)

10 cm(4" ) full-range speaker x 2

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

Width; 480 mm (18-15/16")
Height; 153 mm (6-1/16")
Depth; 254 mm (10")

3.2 kg (7.1 Ibs.) without batteries

    Radio

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

    Tape recorder

Frequency response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio:

50 dB

0.3 % (DIN 45 511)

0.25 % (WRMS)

DC 12 V electric governor

AC bias

Magnet erase

    Compact disc player

Compact disc

Non-contact, 3-beam semiconductor
laser pickup

2

16-bit linear quantization

4-tims oversampling digital filter

1-bit D/A converter

Unmeasurable
(less than 0.001% W. peak)

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

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.

PROBE

AC

OUT

UNIT

SHORT-CIRCUT
AC POWER
SUPPLY CORD

CONNECT THE PROBE
TO GND OF BATTERY 
SPRING

WITHSTANDING

VOLTAGE TESTER

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