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MODEL IDENTIFICATION
— Specification Label —
SONY.
STEREO
CASSETTE
DECK
Whitt
MODEL
NO.
TC-W345
US, Canadian model:
AC 120V
60Hz 18W
AEP model:
AC 220V~50/60Hz
18W
E model: AC 120, 220, 240V~50/60Hz 18W
Australian model : AC 240V~50/60Hz
18W
TABLE
OF CONTENTS
Section
Title
Page
1.
GENERAL
GON ING HS: PEM 55254 cs53h ca croneasscaszevunaeinconenedd auahepeartunetettacteaias
3
2.
MECHANICAL ADJUSTMENT..............: cece
4
3.
ELECTRICAL ADJUSTMENT ............: cscs
4
Record/ Playback Head Azinuth Adjustment
[Deck A/ Deck B]..
4
Tape Speed Adjustment
(Deck A/ Deck BJ...
ce ceceeseereeees
4
Playback Level Adjustment [Deck
A/ Deck
Bl......c.ccccesseens 5
Record Bias Adjustment [Deck Bl}... cecssesssesssessseeessessseseas
5
Record Gain Adjustment | Deck
BJ..........ccccsescceseeesseercsescseescsees 5
4.
DIAGRAMS
4-1.
Printed Wiring Boards ........... ce eceecessteeesstseeessseeesssserereees
6
4-2.
Schematic Diagram ........eceseescseessseeseevesecsserssesseeseeeeaes
9
4-3.
IC Block Diagrams... ccssecssecsesseneesssesssecsseeesessecsseesseanans 12
4-4.
Semiconductor Lead Layouts ..........cecscesecsseesseseeseeenes 13
5.
EXPLODED VIEWS
5-1.
Front Panel and Cabinet Assemblies ..............c:ccescssseeerees 14
5-2.
Mechanism Deck Section
(TCM-180VA-H3) (DECK A)
(TCM-180VB-H3) (DECK B) uu... cccecsessceeecsssesssesseeesessees 15
5-3.
Mechanism
Deck Section2
(TCM-180VA-H3) (DECK A)
(TCM-180VB-H3) (DECK B) .......cssscccsssersesssseuesesteverssentes 16
5-4.
Mechanism Deck Section3
(TCM-180VA-H3) (DECK A)
(TCM-180VB-H3) (DECK B) .......ccesccrecesestesssesseravenverserens 17
6.
ELECTRICAL PARTS LIST uo.
eeceeneeeees 18
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.
SAFETY
CHECK-OUT
(US model only)
After correcting
the original service problem, perform the
following 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). Leakage current can be measured by any one of
three methods.
1.
Acommercial 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 passive VOM thatis suitable.
Nearly all battery operated digital multimeters that have
a2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
| 7 {Ac
Pee
voltmeter
(0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES
PIECES SONT CRITIQUES
POUR
LA SECURITE
DE FONCTIONNEMENT.
NE REMPLACER
CES COM-
POSANTS
QUE
PAR
DES PIECES SONY
DONT
LES
NUMEROS
SONT
DONNES
DANS
CE
MANUEL
OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.
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