Sony cfd 450 service manual

Page 1

CFO-450

SERVICE MANUAL

US Model

@ClfiEfE

DIGITAL AUDIO

MEGQBASS

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC
DlSTOFtTiON

With 4-ohm loads, both channels driven from 150-
15000 Hz: rated 7 W per channel minimum FtMS
power, with no more than 10% total harmonic
distortion in AC operation.

OTHER SPECIFICATIONS
CD player section
System Compact disc digital audio system

Material: GaAlAs

Wavelength 780 nm

Emission duration: Continuous
Laser output: less than 44.6 pW'

This output is the value measured at a distance
oi about 200 mm lrom the objective lens surlace
on the optical pick~up block.

20- 20.000 Hz :5 d8
Below measurable limit

Laser diode properties

Frequency response
Wow and flutter

Radio section
Frequency range FM: a7.&106 MHz

AM: 530-1710 kHz
Antennas FM: Telescopic antenna

AM: Bullt-in ferrite bar antenna

Tape recorder section and general
Recording system 4-traok 2-ohannel stereo
Frequency response 80- 10,000 Hz

(with TYPE I (NORMAL) cassette)

Speaker Wooten 8 cm die, cone type
Tweeter: 5 cm. cone type
inputs Mixing microphone input lack (minijack)
' Sensitivity 2.5 mV
n For low immdance microphone
MIC ROF I LM

Model Name Using CD Section CFD-440

Similar Mechanism Tape Section CFD-440
Optical Device Name KSM-ZIOIBAN
Tape Transport Mechanism Type MF-D4SOS-64RP

Outputs Headphones jack (stereo rninlieck)
For 16 - 68 ohms impedance headphones
Power requirements 120 V AC. 60 Hz
Dc 12 V. 8 size D (R20 ) batteries
Power consumption 30 W
Battery lite (hours)
FM recording Tape playback CD playing
Sony SUM-t (NS) approx 10 approx. 7 approx. 4
Sony Alkaline AM i (N) approx. 16 approx. 12 approx. 7
Dimensions 652 x 225 x 233 mm (w/h/d)
(251/. x 87/. x 9v. times)
incl. protecting pans and controls
Weight Approx. 7.4 kg indt batteries

(Approx. 16 lb 5 oz)

Supplied accessories AC power cord (1)

Design and specifications subject to change without notlce.

cn RAlllil CASSETTE-BORDER
S 0 NY;

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CFD-450

SAFETY CH ECK-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-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)

Ta Exposed Metal
Pans on Set

0.15m: {gram
'._1

'7 Earth Ground

A C
/ voltmeter
{0. 75 V)

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

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY 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 BY SONY.

TABLE OF CONTENTS

Section Title Page
1. SERVICING NOTES .............................. 3
2. GENERAL
2-1. Location and Function of Controls ................ 4
3. DISASSEMBLY
3-1. Front Cabinet Section
3-2. Pointer Setting .......................
4. MECHANICAL ADJUSTMENTS .................... 6
5. ELECTRICAL ADJUSTMENTS
5-1. Tape Recorder Section .......................... 6
5-2. Tuner Section .................................... 7
5-3. CD Section ...................................... 9
6. DIAGRAMS
6-1. Circuit Boards Location ........................ 13
6-2. Block Diagram .................................. 14
6-3. Semiconductor Lead Layouts .................... 17
6-4. Printed Wiring Boards-Tuner/Audio/
Mechanism Deck/ Power Section; .............. 18
6-5. Schematic Diagramiluner Section- ............ 21
6-6. Schematic Diagram-Audio/ Mechanism Deck/
Power Section- ................................ 23
6-7. Schematic Diagram-CD Section- . . .27
6-8. Printed Wiring Boards-CD Section- ............ 31
7. EXPLODED VIEWS
7-1. Cabinet Section
7-2. Front Cabinet Section ..
7-3. Tape Mechanism (1) Section ........... 37
7-4. TapeMechanism(2) Section 38
7-5. CD Block Section .............................. 39
7-6. Optical Pick-up Section .......................... 40
7-7. Speaker Section ................................ 41
8. ELECTRICAL PARTS LIST ................. ..... 42