DOWNLOAD Sharp CD-DP2500 (serv.man27) Service Manual ↓ Size: 5.13 MB | Pages: 74 in PDF or view online for FREE

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ...........................................................................................................  2
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) ..........................................................................................................  3
SPECIFICATIONS .............................................................................................................................................................  4
NAMES OF PARTS ...........................................................................................................................................................  5
WIRING OF PRIMARILY SUPPLY LEADS (FOR U.K. ONLY) ..........................................................................................  7
OPERATION MANUAL ......................................................................................................................................................  8
DISASSEMBLY ................................................................................................................................................................  11
REMOVING AND REINSTALLING THE MAIN PARTS ...................................................................................................  14
ADJUSTMENT .................................................................................................................................................................  15
TEST MODE ....................................................................................................................................................................  18
RDS OPERATION ...........................................................................................................................................................  18
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  22
BLOCK DIAGRAM ...........................................................................................................................................................  23
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................. 26
VOLTAGE ........................................................................................................................................................................  46
WAVEFORMS OF CD CIRCUIT ......................................................................................................................................  47
TROUBLESHOOTING (CD SECTION) ...........................................................................................................................  48
FUNCTION TABLE OF IC ................................................................................................................................................  52
FL DISPLAY ...................................................................................................................................................................... 58
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (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.

Manufactured under license from Dolby Laboratories Licens-
ing Corporation.
DOLBY, the double-D symbol 

 and "PRO LOGIC" are

trademarks of Dolby Laboratories Licensing Corporation.

 • Note for users in UK

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.

– 2 –

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.

Laser Diode Properties

Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

– 3 –

NG: The “NG” lamp lights and the buzzor sounds.

OK: The “GOOD” lamp lights.

Judgment

Unit

Set current (Cutoff current)

Set time

Set name

Withstanding Voltage Tester

Test voltage

Set value

4,240 VPEAK

3,000 VRMS

6 secs

4 mA

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.

PROBE

AC

OUT

UNIT

SHORT-CIRCUIT
AC POWER
SUPPLY CORD

CONNECT THE PROBE
TO GND OF CHASSIS
SCREW

WITHSTANDING

VOLTAGE TESTER

●

This Mini Component System is classified as a CLASS 1
LASER product.

●

The CLASS 1 LASER PRODUCT label is located on the
rear cover.

●

Use of controls, adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.

As the laser beam used in this compact disc player is harm-
ful to the eyes, do not attempt to disassemble the cabinet.
Refer servicing to qualified personnel only.

Laser Diode Properties

Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

Screw

– 4 –

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

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

●

AC 230-240 V, 50 Hz

Power consumption: 155 W
Dimensions:

Width; 270 mm (10-5/8")
Height; 330 mm (13")
Depth; 332 mm (13-1/16")

8.2 kg (18.0 lbs.)

●

PMPO; 600 W (Total)

Front speakers;
MPO; 200 W (100 W + 100 W)
(DIN 45 324)
RMS; 120 W (60 W + 60 W)
(DIN 45 324)
RMS; 96 W (48 W + 48 W)
(DIN 45 500)
Centre speaker;
MPO; 50 W (DIN 45 324)
RMS; 30 W (DIN 45 324)
RMS; 24 W (DIN 45 500)
Surround speakers;
MPO; 50 W (25 W + 25 W)
(DIN 45 324)
RMS; 30 W (15 W + 15 W)
(DIN 45 324)
RMS; 24 W (12 W + 12 W)
(DIN 45 500)

RMS; 120 W (60 W + 60 W)
(10 % T.H.D.)
RMS; 96 W (48 W + 48 W)
(0.9 % T.H.D.)
Centre speaker;
RMS; 30 W (10 % T.H.D.)
RMS; 24 W (0.9 % T.H.D.)
Surround speakers;
RMS; 30 W (15 W + 15 W)
(10 % T.H.D.)
RMS; 24 W (12 W + 12 W)
(0.9 % T.H.D.)

   (For AUSTRALIA/

MPO; 200 W (100 W + 100 W)

(10 % T.H.D.)
RMS; 120 W (60 W + 60 W)
(10 % T.H.D.)
RMS; 96 W (48 W + 48 W)
(0.9 % T.H.D.)
Centre speaker;
MPO; 50 W (10 % T.H.D.)
RMS; 30 W (10 % T.H.D.)
RMS; 24 W (0.9 % T.H.D.)
Surround speakers;
MPO; 50 W (25 W + 25 W)
(10 % T.H.D.)
RMS; 30 W (15 W + 15 W)
(10 % T.H.D.)
RMS; 24 W (12 W + 12 W)
(0.9 % T.H.D.)

Front speakers; 6 ohms
Centre speaker; 6 ohms
Surround speakers; 12 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Video/Auxiliary (audio signal) 

×

 2;

500 mV/47 kohms

●

3-disc multi-play compact disc player

Non-contact, 3-beam semiconductor
laser pickup

1-bit D/A converter

Frequency response: 20 - 20,000 Hz
Dynamic range:

90 dB (1 kHz)

●

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)

0.35 % (DIN 45 511)

 0.3 % (WRMS)

●

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

120 W

60 W

6 ohms

Width; 240 mm (9-1/2")
Height; 330 mm (13")
Depth; 255 mm (10-1/16")

3.9 kg (8.5 lbs.)/each

●

10 cm (4") full-range speaker

60 W

30 W

6 ohms

Width; 260 mm (10-1/4")
Height; 140 mm (5-1/2")
Depth; 155 mm (6-1/8")

0.9 kg (2.0 lbs.)

●

10 cm (4") full-range speaker

30 W

15 W

12 ohms

Width; 200 mm (7-7/8")
Height; 93 mm (3-11/16")
Depth; 170 mm (6-3/4")

0.5 kg (1.1 lbs.)/each