– 2 –
TABLE OF CONTENTS
Section
Title
Page
Specifications ................................................................................ 1
1. GENERAL
Location of Controls ............................................................... 3
2. ADJUSTMENTS
............................................................... 4
3. EXPLANATION OF IC TERMINALS
.......................... 5
4. DIAGRAMS
4-1. Circuit Boards Location ................................................... 7
4-2. Printed Wiring Boards ...................................................... 8
4-3. Schematic Diagram ........................................................ 11
5. EXPLODED VIEW
5-1. Front Section .................................................................. 15
6. ELECTRICAL PARTS LIST
........................................ 17
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 re-
turn to chassis, must not exceed 0.5mA (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
instruments.
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 voltmeter. The “limit” indication is 0.75V,
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)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
AC
Voltmeter
(0.75V)
0.15 F
µ
1.5k
Ω
To Exposed Metal
Parts on Set
MODEL NO.
ST-JX661
ST-SE200
FM STEREO/FM-AM TUNER
MODEL IDENTIFICATION
– Model Number Label –
US, Canadian model : AC 120
⁄
60Hz
UK, Australian model : AC 240
⁄
50Hz
AEP, German, Italian model : AC 220–230V
⁄
50Hz
E, Singapore, Chinese,
Malaysia, Saudi Arabia model : AC 110–120 V/220–240 V
⁄
50/60 Hz
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
!
SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
!
OR DOTTED LINE WITH
MARK
!
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 PUBLISHED BY SONY.
