Sony cfd 50 service manual

Page 1

US Model
Canadian Mode/

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS (US model)

Full-range speakers:

With 3.2~ohm loads, both channels driven from
15045000 Hz: rated 2.3W per channel mini-
mum RMS power, with no more than 10% total
harmonic distortion in AC operation.

OTHER SPECIFICATIONS

CD player section
System
Laser diode properties

Frequency response
Wow and llutter

Tuner section
Frequency range

Compact disc digital audio system

Material: GaAIAs

Wavelength 780 nm

Emission duration: Continuous

Laser output: less than 44.6 pW

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

20-20900 Hz 2? dB

Below measurable limit

FM: 87.6-108 MHz
AM: 530~1.710 kHz

Tape recorder section and general

Recording system
Frequency response

Speaker
Power output
(Canadian model)

4-track 2-channel stereo

7O - 10.000 HZ

(with TYPE l (NORMAL) cassette)

Full~range speakers: 10 cm die. cone type
Full-range speakers: 2.3W+2.3W (at 32 ohms,
315 Hz. 10% harmonic distortion)

Model Name Using CD Section CPD-60

Similar Mechanism fgrgggégggg Bic-$55} """"

Optical Device Name KSM-21OBAN
"fiéefiéhsééR'Mé'cfiéhi'sh'fi'yfiéw Melis'dfiiifiB

Inputs Mixing microphone input jack (minijack)
Sensitivity 2.5 mV
For low impedance microphone
Outputs Headphones jack (stereo minijack)

For 16-68 ohms impedance headphones

Power requirements 120 V AC. 60 Hz

DC 9 V, 6 size D (R20) batteries

Power consumption AC 25 W
Battery lite Batteries for radio cassette-comer (hours)
FM Recording Playback
Sony SUM-1 (NS) approx. 11 approx. 8
Sony Alkaline AM1 (N) approx. 17 approx. 12

Dimensions 590 X 172 X 200 mm (w/h/d)
(23% X 67/; X 77/; inches)
incl, projecting parts and controls
Weight Approx. 46 kg, incl. batteries

(Approx. 10 ID 2 oz)

Supplied accessories AC power cord (1)

Design and specifications subject to change without notice.

[ID RADIO CASSETTE-

BORDER

ONY;

Page 2

CFD-50

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.

I. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. 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 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Part: on Set

r.
0.75/4}: L 7.5m /

._J

'7' Earth Glound

AC
voltmeter
I0. 75 VI

F fg. A. Using an AC voltmeter to check AC leakage.

TAB LE OF CONTENTS

Section % Page
Specifications ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1
Safety Checkout ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2
1. SERVICING NOTES

Notes on Handling the Optical Pickup

Block or Base Unit 3

Notes on LaserDiode Emission Check - - 3

Chuck Plate Jig on Repairing ~~~~~~~~~~~~ 3

Laser Diode and Focus Search

Operation Check ~~~~~~~~~~~~~~~~~~~~~~~~ 3
2. GENERAL ............................. 4
3. DISASSEMBLY ------------------------ 4
4. MECHANICAL ADJUSTMENTS

Tape Recorder Section ---------- 6
5. ELECTRICAL ADJUSTMENTS
5-1. Tape Recorder Section 7
5~2. Tuner Section ~~~~~~~~~~~~~~~~~~~~~~~~~~ 8
53. CD Section ----------------------------- 9
6. DIAGRAMS
6-1. CD Section Block Diagram ~~~~~~~~~~~~~~~~~ 13
6-2. Tuner, Audio Section Block Diagram IS
63. Printed Wiring Boards -------------------- 17
6-4. Tuner, Audio Section Schematic Diagram - ~ - ~ 21
6-5. CD Section Schematic Diagram ------------- 25
7. EXPLODED VIEWS ~~~~~~~~~~~~~~~~~~~~ 29
B. ELECTRICAL PARTS LIST ~~~~~~~~~~~~ 3S

SAFETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED av MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR As
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED av SONY.
ATTENTION AU COMPOSANT AVANT RAPPORT
A LA SECURITEI

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sUR LEs DIAGRAMMEs SCHEMATIOUES Er LA LISTE
DEs PIECES sour CRITIQUES POUR LA SECURITE
DE FONCTIONNEMENT. NE REMPLAOER CEs COM-
POSANTS oUE PAR DES PIECES SONV DONT LEs
NUMERos som DONNEs DANS CE MANUEL ou
DANs LES SUPPLEMENTS PUELIEs PAR SDNV.