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TC-WE475
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. RE-
PLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
Ã- LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 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 CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks 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
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). Leak-
age 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 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15µFTo Exposed Metal
Parts on Set
1.5k-„¦AC
voltmeter
(0.75V)
Earth Ground
General
Power requirements
U.S.A.and Canadian models:
120 V AC, 60Hz
European models:
230 V AC, 50/60Hz
Australian models:
240 V AC, 50/60Hz
Other models:
120/220/230-240 V AC, 50/60Hz
Adjustable with voltage selector
Power consumption
18 watts
Dimensions (w/h/d)
Approx. 430 × 120 × 300 mm
Mass 4.2 kg
Supplied accessories
Audio connecting cords (2)
Control A1II cable (1)*
*Supplied for Canadian models only
Design and specifications are subject to change
without notice.
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TC-WE475
PARTS No. MODEL
4-232-514-0sUS model
4-232-514-1sCND model
4-232-514-2sAEP model
4-232-514-3sUK model
4-232-514-4sSP model
4-232-514-5sAUS model
MODEL IDENTIFICATION
-“Back panel-“
Part No.
- Abbreviation
CND : Canadian model
SP : Singapore model
AUS : Australian model
TABLE OF CONTENTS
1. GENERAL
.......................................................................... 4
2. DISASSEMBLY
2-1. Case ...................................................................................... 5
2-2. Front Panel Assy ................................................................... 5
2-3. Cassette Lid Assy (Deck A/B) .............................................. 6
2-4. Mechanism Deck Assy (Deck A/B) ...................................... 6
3. SERVICE MODE .............................................................. 7
4. MECHANICAL ADJUSTMENTS ................................. 8
5. ELECTRICAL ADJUSTMENTS ................................. 8
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 12
6-2. Printed Wiring Board -“ MAIN Section -“ ............................ 14
6-3. Schematic Diagram -“ MAIN (1/4) Section -“ ...................... 15
6-4. Schematic Diagram -“ MAIN (2/4) Section -“ ...................... 16
6-5. Schematic Diagram -“ MAIN (3/4) Section -“ ...................... 17
6-6. Schematic Diagram -“ MAIN (4/4) Section -“ ...................... 18
6-7. Printed Wiring Board -“ DECK A Section -“ ........................ 19
6-8. Schematic Diagram -“ DECK A Section -“ ........................... 19
6-9. Printed Wiring Board -“ DECK B Section -“ ........................ 19
6-10. Schematic Diagram -“ DECK B Section -“ ......................... 19
6-11. Schematic Diagram -“ DISPLAY Section -“ ....................... 20
6-12. Printed Wiring Board -“ DISPLAY Section -“ .................... 21
6-13. Schematic Diagram -“ PANEL Section -“ ........................... 22
6-14. Printed Wiring Board -“ PANEL Section -“ ........................ 23
6-15. Schematic Diagram -“ POWER Section -“ ......................... 24
6-16. Printed Wiring Board -“ POWER Section -“ ...................... 25
6-17. IC PIN FUNCTION .......................................................... 26
7. EXPLODED VIEWS
7-1. Case Section ........................................................................ 27
7-2. Chassis Section ................................................................... 28
7-3. Cassette Holder Section ...................................................... 29
7-4. Front Panel Section ............................................................. 30
7-5. Tape Mechanism Section .................................................... 31
8. ELECTRICAL PARTS LIST ........................................ 32
