Sharp cd ba 250 service manual

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CD-BA250/CD-BA2600

SHARP SERVICE MANUAL

No. S1105CDBA250/

MINI COMPONENT SYSTEM

' O MODELCD-BA250

CD-BA250 Mini Component System consisting of
CD-BA250 (main unit) and CP-BA250 (speaker system).

MINI COMPONENT SYSTEM

[flow MODEL CD-BA2600
USE CD-BAZGOO Mini Component System consisting of
'G'TA" A°'° CD-BA2600 (main unit) and CP-BAZGOO (speaker system).
cn-R/RW/ /I/

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

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

/- CONTENTS %

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)
SPECIFICATIONS
NAMES OF PARTS ..
OPERATION MANUAL
DISASSEMBLY ............

REMOVING AND REINSTALLING THE MAIN PARTS..

ADJUSTMENT ...... 13
BLOCK DIAGRAM 17
SCHEMATIC DIAGRA .20
VOLTAGE .......................................... 36
NOTES ON SCHEMATIC DIAGRAM 37
TYPES OF TRANSISTOR AND LED. .37

WAVEFORMS OF CD CIRCUIT.
TROUBLESHOOTING .....
FUNCTION TABLE OF IC
FL DISPLAY .....................
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (FOR U.S.A, ONLY)

This document has been published to be used

SHARP CORPORATION for after sales service only.

The contents are subject to change without notice.

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CD-BA250/CD-BA2600

TO THE OPERATION MANUAL.

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

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)

Before returning the audio product to the user, perform the

following safety checks.

1. Inspect all lead dress to make certain that leads are not
pinched orthat hardware is not lodged between the chassis
and other metal parts in the audio product.

. Inspect all protective devices such as insulating materials,
cabinet, terminal board, adjustment and compartment covers
or shields, mechanical insulators etc.

. To be sure that no shock hazard exists, check for leakage
current in the following manner.

Plug the AC line cord directly into a 120 volt AC outlet.
Using two clip leads, connect a 1.5k ohm, 10 watt resistor
paralleled by a 0.1 SpF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.
Use a VTVM or VOM with 1000 ohm per volt, or higher,
sensitivity to measure the AC voltage drop across the
resistor (See diagram).

Connect the resistor connection to all exposed metal parts
having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.

9%

VTVM
'0 AC SCALE 0'

1 .5k ohms
1 OW

0.15 It F
TEST PROBE
To EXPOSED CONNECT To
METAL PARTS KNOWN EARTH
GROUND

AllcheckmustberepeatedwiththeAClinecord plugconnection
reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.

SPECIFICATIONS

CD-BA250/CD-BA2600

I General

I Tuner

Power source AC 120 V, 60 Hz

Frequency range FM: 87.5 - 108 MHz

Output power 75 watts minimum RMS per channel into 6 ohms from

60 Hz to 20 kHz, 10% total harmonic distortion

Output terminals Speakers: 6 ohms
Headphones: 16 - 50 ohms (recommended: 32 ohms)

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

Input terminals

Power consumption 128 W AM: 530 » 1,720 kHz
Dimensions Width: 10-5/8 (270 mm)
Height: 1 (330 mm)
Depth: 13-7/16 (340 mm) I Cassette deck
Weight 13-8 lbs. (6'3 kg) Frequency response 50 - 14,000 Hz (Normal tape)
Signal/noise ratio 55 dB (TAPE 1, playback)
I Ampllfler 50 dB (TAPE 2, recording/playback)

Wow and flutter 0.3 /s (WRMS)

CP-BA250/CP-BA2600

Type

2-way type speaker system
2" (5 cm) Tweeter
5-1/4 (13 cm) Woofer

I CD player Maximum input power 150 W
Type 3-disc multi-play compact disc player Rated input power 75 W
Signal readout Non-contact. 3-beam semiconductor laser pickup Impedance 6 ohms

_ Dimensions Width: 8-11/16" (220 mm)
D/A converter 1 bit D/A converter Height: 13,, (330 mm)
Frequency response 20 - 20.000 Hz Depth: 8-9/16 (217 mm)
Dynamic range 90 dB (1 kHz) Weight 6.6 lbs. (3 0 kg)/each

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