Sony cfd 250 service manual

Page 1

CFD-ZSfl/ZBD

SERVICE MANUAL

Photo : CFO-260

US Model
Canadian Model

CFD-Z50/ 260

Australian Model

CPD-250

E Model

CFO-260

MEGABASS

SPECIFICATIONS

CD Section

CFD-703

Model Name Using
Similar Mechanism

Tape Section

CFD-250 CFS-W304

CPD-250 MF-250-64
Tape Transpm D k A MP 260 64PB
Mechanism Type CPD-260 ..... e_c .................... I ......... T. .............
Deck B MF-260-102
Optical Pickup Block Type KSM-SSOAAM

AUDIO POWER SPECIFICATIONS (US model)
POWER OUTPUT AND TOTAL HARMONIC DlSTORTION
With 3-ohm loads, both channels driven from 15o-1o,ooo Hz: rated 3.5 W per channel-minimum
RMS power, with no more than 10% total harmonic distortion in AC operation.

Other Specifications

CD Player section
System
Laser diode properties

Spindle speed
Error correction

Number of channels
Frequency response
Wow and flutter

Compact disc digital audio system

Materlal: GaAIAs

Wave length 780 nm

Emission duration: Continuous

Laser output: Less than 44.6;4W'

'This output is the value measured at
a distance of about 200 mm from the
objective lens surface on the optical
pick-up block.

200 r/min (rpm) to 500 r/min (rpm) (CLV)

Sony Reilnd Super Strategy Cross

Interleave Head Solomon Code

2

20 - 20,000 Hz 1:1 dB

Below measurable limit

Radio sectlon
Frequency range

Antennas

FM: 87,6 - 108 MHZ
AM: USA and Canadian models
580 ~1,710 kHz
Other models
531 - 1,602 kHz
FM: Telescopic antenna
AM: Built-in ferrite bar antenna

Tape recorder section and general

Recording system
Fast winding time

Speaker

4-track 2-channel stereo

Approx. 120 Si with Sony cassette
HF60

Full range: 8cm dia.. cone type

-Continued next page-

cn RADlll CASSETTE-BORDER
SONY®

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Frequency response
TYPE | (normal) cassette:
50 -12.000 Hz (EIAJ)

Inputs Mixing mlcrophone input jack (mlnijack)

Sensitivity 2.45 mV

For low impedance microphone
Outputs Headphones jack (stereo miniiack)
For 8 -32 ohms impedance
headphones
Taiwan model:
4.5 W + 4.5 W

Power output

(at 3 ohms, 10% harmonic distortion in

AC operation)
Other models (except USA model):
4.5 W + 4.5 W

(at 3 ohms, 10% harmonic distortion in

DC operation)

For CD radio cassette-corder
Australian model: 240 V AC, 50 Hz
Other models: 120 V AC, 60 Hz
DC 12 V, 8 size D (R20) batteries

For clock/timer/memory
DC 6 V, 4 size AA (R6) batteries

For remote commander
DC 3 V, 2 size AA (R6) batteries

Power requirements

Power consumption Canadian model: 27 W
Taiwan model: 31 W
Other models: 25 W
Battery life

Batteries for CD radio cassette corder

FM Recardlng Tape Playback CD.playing

Sony SUM-1 (NS) approx. 4h approx. 2h approx. 1h

Sony Alkaline AMt approx. 12h approx. 5.5h approx. 3h

For clock/timerlmemory: approx. 1 year

Dimensions 572 x 185 x 230 mm (w/h/d)

(225/. x 72/; x 9']; inches)

incl. projectlng parts and controls

Weight CPD-250 6.4kg (14 lb. 2 oz.)
CPD-260 6.9kg (15 lb. 3 oz.)
(incl. batteries; excl. supplied
accessories)

Supplied acceessories AC power cord (1)
Remote commander (1)

Design and specificatlons subject to change without notice.

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK & ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!

LES comeosmrs IDENTIFIES PAR UNE MAROUE A
sun LES DIAGRAMMES SCHEMATIOUES er LA LISTE
DES PIECES SONT cnlnouEs POUR LA sécunn'é
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIECES SONY DONT LES
NUMéRos som ooNNés DANS cs MANUEL ou
DANS LES SUPPLEMENTS Pueués PAR SONY.

SAFETY CHECK-OUT

After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:

Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.

1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-S40A. Follow the
manufacturers instructions to use these instru-
ments.

2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.

3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The limit indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are
suitable. (See Fig. A)

To Exposed Metal
Parts an Se!

AC
0.15uF 1.5m / minim,
10.7w;

._l

5? Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.