CD-BA3000 (serv.man3). Part 1 - text - Sharp Audio Service Manual (repair manual)

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................ 2
SPECIFICATIONS .............................................................................................................................................................  3
NAMES OF PARTS ...........................................................................................................................................................  4
OPERATION MANUAL ......................................................................................................................................................  6
DISASSEMBLY ..................................................................................................................................................................  7
REMOVING AND REINSTALLING THE MAIN PARTS ...................................................................................................  10
ADJUSTMENT .................................................................................................................................................................  11
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  14
BLOCK DIAGRAM ...........................................................................................................................................................  15
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................. 18
VOLTAGE ........................................................................................................................................................................  36
WAVEFORMS OF CD CIRCUIT ......................................................................................................................................  37
TROUBLESHOOTING (CD SECTION) ...........................................................................................................................  38
FUNCTION TABLE OF IC ................................................................................................................................................  42
FL DISPLAY ...................................................................................................................................................................... 48
REPLACEMENT PARTS LIST/EXPLODED VIEW

• In the interests of user-safety the set should be restored to its

original condition and only parts identical to those specified be
used.

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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.

Laser Diode Properties

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

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●

AC 230 V, 50 Hz

Power consumption: 180 W
Dimensions:

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

9.8 kg (21.5 lbs.)

●

PMPO; 880 W (Total)
MPO; 440 W (220 W + 220 W)
(DIN 45 324)
RMS; 300 W (150 W + 150 W)
(DIN 45 324)
RMS; 236 W (118 W + 118 W)
(DIN 45 500)

Speakers; 6 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Video/Auxiliary (audio signal);
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)

3-way type [20 cm (8") woofer,
8 cm (3") tweeter and super tweeter]

300 W

150 W

6 ohms

Width; 250 mm (9-7/8")
Height; 330 mm (13")
Depth; 335 mm (13-1/4")

6.1 kg (13.4 lbs.)/each

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.

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