Sony tc c 521 service manual

Page 2

TC-CS/ C521 TABLE OF CONTENTS

Section E P_a,g§
SAFETY CHECK-OUT SERVICE NOTE

SECTION 1, GENERAL ...................................................... 5

After correcting the original service problem,
perform the following safety check before releasing SECTION 1 DISASSEMBLY """" """"""""""""""""""" 6
the set to the customer:
Check the antenna terminals, metal trim, metallized

knobs, screws, and all other exposed metal parts for SECTION 4. MECHANISM OPERATION ........................ 13
AC leakage. Check leakage as described below.

SECTION 3. DIAGRAM - -10

SECTION 5, ADJUSTMENTS .......................................... 17

LE
AKAGE TEST SECTION 6. DIAGRAMS

The AC leakage from any exposed metal part to 6-1. Primed Wiring Boards
earth ground and from all exposed metal parts to any -Audio/System comm Section Former Type-IN 21
exposed metal part having a return to chassis, must 5.2. Primed Wiring Boards
not exceed 0.5 mA (500 microampers). Leakage -Audio/SySIem Comm] Section New Type-
current can be measured by any one of three 6-3. Schematic Diagram-System Control Section
methods [C Block Diagram ...................................

1, A commercial leakage tester, such as the 6-4. Circuit Boards Loom, .................... .. ................. 33
Simpson 229 or RCA WT-S40A. Follow the 66. Schematic Diagram-Audio Section- ........... . ...... 33
manufacturers instructions to use these instru- 6-6. Printed Wiring Board-TC Section!
ments. Fluorescent Indicawr Tube

2. A battery-operated AC milliammeter. The Data Semiconductor Lead Layouts ................................. 40
Precision 245 digital multimeter is suitable for
this job. SECTION 7. EXPLODED VIEWS

7.1. Drum Section

3. Measuring the voltage drop across a resistor by
means of a VOM or batteryroperated AC volt-

7-2. Front Panel Section

meter. The limit" indication is 0.75 V, so 7'3~ 513d 5mm """""""""""""""""""""""""""" 43
analog meters must have an accurate low- 74. Chassis Section ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
voltage scale. The Simpson 250 and Sanwa 7-5. Mechanism Section]
SH-63Trd are examples of a passive VOM that 7-6. Mechanism Section2
is suitable, Nearly all battery operated digital
multimeters that have a 2 V AC range are SECTION 8~ ELECTRICAL PARTS LIST """""""""""" '47
suitable. (See Fig. A)
MODEL IDENTIFICATION TC 05
-Specification Label- Tc-0521

To 'Exposed Metal

"8 a 3" S ONE MODEL NO. m

-1 STEREO CASSETI'E DECK
C W
0.15M: gum / CID/mm,
(0.75 w
' SERIAL NO.

MADE IN JAPAN

"7 Earth Ground US, Canadian model: AC120V Gon 20W
AEP, Germany model: A0220»230V~50/60Hz
Fig. A. Using an AC voltmeter to check AC leakage. UK model; A0240V~50/60Hz

E model: A0120, 220, 240V~50l60Hz 20W

SAFETY-RELATED COMPONENT WARNING ATTENTION AU~COMPOISANT AYANT RAPPORT

COMPONENTS IDENTIFIED BY MARK A on DOTTED A LA SECER'TE!

LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
AND IN THE PARTS LIST ARE CRITICAL To SAFE SUR LEs DIAGRAMMES SCHEMATIOUES ET LA LIsTE
OPERATION. REPLACE THESE COMPONENTS WITH DES PIECES SONT CRITIQUES POUR LA SECURITE
souv PARTS WHOSE PART NUMBERS APPEAR AS DE FONCTIONNEMENT. NE REMPLACER CES COM-
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- POSANTS QUE PAR DES PIECES SONY DONT LEs
LISHED By SONY. NUMERos SONT DONNEs DANS CE MANUEL ou

DANS LES SUPPLEMENTS PUBLIEs PAR SONY.