Sony cfd 58 service manual

Page 2

CFD-58

TABLE OF CONTENTS

Section Title Page

SAF ETY CH ECK'O UT SECTION 1 SERVICING NOTES .................................... 3

SECTION 2. DIS ASSEMBLY ...................... . ........ ........... 4

After 00th the original seTVice problem, SECTION 3. PIN DESCRIPTION ....................................... 7
perform the followmg safety check before releasmg

the set to the customer: SECTION 4. MECHANICAL ADJUSTMENT ~~~~~~~~~~~~~~~~~~~~~ 9

Check the antenna terminals, metal trim, metallized SECTION 5. ELECTRICAL ADJUSTNENT ........................ 9

knobs, screws, and all other exposed metal parts for

AC leakage. Check leakage as described below. SECTION 6 DIAGRAMS

6-]. Printed Wiring Boards" - 16
LEAKAGE TEST 6-2. Schematic Diagram-Tuner [Audio Section - n s 19
The AC leakage from any exposed metal part to 6-3. Schematic Diagram- CD Section - ~~~~~~~~~~~~~~~~~ 23
earth ground and from all exposed metal parts to any 64 Circuit Boards mum ...................................... 25
exposed metal part having a return to chassis, must ,
not exceed 05 mA (500 microampers) Leakage Semiconductor- Lead Layouts ........................... 26
current can be measured by any one of three SECTION 7. EXPLODED VIEWS
methods. 7-1. Front panel and Tuner Board Section ------------------- 27
1r A commercxal leakage tester, such as the 7-2. PC Boards 5M0" ............................................. 28
Simpson 229 or RCA WT-540Al Follow the
manufacturers instructions to use these instru- 7'3 CD sumo """""""""""""""""""""""""""" 29
merits. 7.4~ MD Section-l 30
2. A battery-operated AC milliammeter. The Data 7-5. MD Section-2 -------------- -- ~~~~~~~~~~~~~~~~~~~~~~ ' ~~~~~~~~~~~~ 31
flreciSiEn 245 digital multimeter is suitable for 7-6, Optical Pickup Block ..................................... 32
15,10 .
SECTION 8. ELECTRICAL PARTS LIST ~~~~~~~~~~~~~~~~~~~~~~~~ 33

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

. I SAFETY- ED OMPONENT 6!!
su1table. (See Fig. A) RELAT C WARNIN

COMPONENTS IDENTIFIED BY MARK A on DOTTED
LINE WITH MARK A oN THE scHEMATic DIAGRAMS
AND W THE PARTS LIST ARE CRITICAL To SAFE
To Exposedmm OPERATION. REPLACE THESE COMPONENTS WITH
Paman Set SONY PARTs WHOSE PART NUMBERS APPEAR AS

SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-

LISHED BY SONY.
/ AC ATTENTION AU COMPOSANT AVANT RAPPORT
é 1.5km voltmeter A LA SECURITE!

0.75uF
lo. 75 w ,

- LES COMPOSANTS IDENTIFIES PAR UNE MARaUE A

._' sun LEs DIAGRAMMES SCHEMATiouEs ET LA LISTE

DES PIEcEs SONT CRiTiouEs POUR LA SECURITE

DE FONCTIONNEMENT. NE REMPLACER CES COM-

? 55" 60 POSANTS QUE PAR DES PIEcEs SONY DONT LEs
4 . NUMERos som DONNés DANS cE MANUEL 0U
Fig. A. Usmg an AC voltmeter to check AC/eakage. DANS LES SUPPLEMENTS PUBLIés PAR SONY.