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Sony TC-W345 User manual

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SERVICE
MANUAL
*
Dolby
noise
reduction
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
“DOLBY”,
the
double-D
symbol
O00
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.
Model
Name
Using
Similer
Mechanism
Tape
Transport
Mechanism
Type
TC-W345
US
Model
Canadian
Model
AEP
Model
E
Model
Australian
Model
TC-W31
(US,
Canadian,
E
model)
TC-W170
(AEP
model)
NEW
(Australian
model)
DECK-A
|
TCM-180VA-H3
DECK-B
|
TCM-180VB-H3
SPECIFICATIONS
Recording
system
4-track
2-channel
stereo
Fast-forward
and
rewind
time
Approx.
120
sec.
(with
C-60
cassette)
Bias
AC
bias
Signal-to-noise
ratio
(NAB,
at
peak
level)
Sa
ae
B-TYPE
ON
|
C-TYPE
ON
TYPE
IV
58
dB
66
dB
73
dB
TYPE
Il
57
dB
65
dB
72
dB
TYPE
|
55
dB
63
dB
70
dB
Total
harmonic
distortion
1.0%
(with
Sony
METAL-ES
cassette)
Frequency
response
(DOLBY
NR
OFF)
30-
15,000
Hz
(+3
dB)
TPE
IV
cassette:
|
49
_
44.000
Hz
(OVU
recording)
TYPE
Il
cassette
|
30-14,000
Hz
(+3
dB)
TYPE
|
cassette
|
30-13,000
Hz
(+3
dB)
Type
IV:
Sony
Type
IV
(METAL)
Type
II:
Sony
Type
II
(HIGH)
Type
|
:
Sony
Type
|
(NORMAL)
Cassette
Wow
and
flutter
+0.16%
W
Peak
(IEC)
0.11%
WRMS
(NAB)
+0.2%
W
Peak
(DIN)
\
:
RS
\,
XN
Reier
to
the
Inputs
Rated
output
level
0.44
V
(-5
dB)
at
a
load
impedance
of
47
k
ohms
Load
impedance
Over
10
k
ohms
Output
level
0.3
mW
at
a
load
impedance
of
32
ohms
Model
for
USA,
Canada
:
120
V
AC,
60
Hz
Model
for
European
countries:
220
-
230
V
AC,
50/60
Hz
Model
for
UK,
Australia
:
240V
AC,
50/60Hz
Model
for
other
countries:
120,
220,
or
240
V
AC
adjustable,
50/60
Hz
Power
consumption
18
W
Dimensions
Approx.
430
x
123
x
280
mm
(w/h/d)
(17
x
47/s
x
11'/s
inches)
including
projecting
parts
and
controls
Mass
Approx.
3.6
kg
(7
Ibs
15
oz)
Line
inputs
(phono
jacks)
Outputs
Line
outputs
(phono
jacks)
Headphones...
.
(stereo
phone
jack)
General
Power
requirements
Supplied
accessories
Audio
connecting
cords
(2)
Design
and
specifications
subject
to
change
without
notice.
STEREO
CASSETTE
DECK
ONY.
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.
SECTION
1
GENERAL
Co(svayijicersi
(ep
Mele
mi
ce)a)
Mm
orl
a(>)|
POWER
switch
[2]
Cassette
holder
(deck
A)
[3
|PEAK
LEVEL
METER
[4
|
DUBBING
SPEED
and
RECORD
indicators
[5
|
TAPE
COUNTER
and
RESET
button
[6
|
Cassette
holder
(deck
B)
[7
|Tape
operation
buttons
@
REC
(record)
button
(deck
B
only)
[>
(play)
button
<4
(rewinding)
button
bP
(fast-forward)
button
m4
(stop)
and
(eject)
button
il
PAUSE
button
REC
(recording)
LEVEL
control
[9
|
BALANCE
control
DUBBING
SPEED
button
HIGH/NORMAL
speed
button
DOLBY
NR
(Dolby
noise
reduction)
buttons
[12]
TAPE
SELECT
switches
HEADPHONES
jack
(stereo
phone
jack)
—
3—
This
section
is
extracted
from
instruction
manual.
SECTION
2
MECHANICAL
ADJUSTMENTS
PRECAUTION
1.
Clean
the
following
parts
with
a
denatured-alcohol-
moistened
swab:
record/playback
head
pinch
roller
erase
head
rubber
belts
capstan
idlers
Torque
Measurement
Bae
a
nel
motes
fesding
wo
|
:
30—
70
g*cm
athe
aes
(0.42
—
0.97
oz
«
inch)
FWD
CQ-102RC
p
PE
SREW
CQ-201B
1.5—7g*¢cm
(0.020
—
0.096
oz
«
inch)
63
g
*
cm
or
more
(0.87
oz
«
inch
or
more)
SECTION
3
ELECTRICAL
ADJUSTMENTS
1.
Demagnetize
the
record/playback
and
erase
head
with
a
head
demagnetizer.
2.
Do
not
use
a
magnetized
screwdriver
for
the
adjustments.
3.
After
the
adjustments,
apply
suitable
locking
compound
to
the
parts
adjusted.
4,
The
adjustments
should
be
performed
with
the
rated
power
supply
voltage
unless
otherwise
noted.
5.
The
adjustments
should
be
performed
in
the
order
given
in
this
service
manual.
(As
a
general
rule,
playback
circuit
adjustment
should
be
completed
before
performing
recording
circuit
adjustment.)
6.
The
adjustments
should
be
performed
for
both
L-CH
and
R-CH.
e
Switches
and
controls
should
be
set
as
follows
unless
otherwise
specified.
DOLBY
NR
switch:
OFF
TAPE
select
switch:
TYPE
1
(NORMAL)
(DECK-B)
Mode:
record
—
AF
OSC
6002
jing
IN
LINE
OUT
315Hz
[ipattsel
|
108)
RECORD/PLAYBACK
HEAD
AZIMUTH
ADJUSTMENT|DECK
A/DECK
B
Procédure:
1.
Mode:
FWD
playback
test
tape
P-4-A100
(10kHz,
—
10dB)
R-CH
LINE
OUT
2.
Turn
the
adjustment
screw
and
check
output
peaks.
If
the
peaks
do
not
match
for
L-CH
and
R-CH,
turn
the
adjustment
screw
so
that
outputs
match
within
1
dB
of
peak.
output
level
within
1
dB
L-CH
R-CH
peak
peak
Screen
pattern
—~
screw
position
O@OO®Q®
:
h
45°
é
3
‘i
in
phase
90
135°
180
good
wrong
3.
After
the
adjustments,
apply
suitable
locking
compound
to
the
parts
adjusted.
Adjustment
Location:
FWD
REV
rere
eran
yoteemenerereemaneensd
Adjustment
screw
TAPE
SPEED
ADJUSTMENT/|DECK
A/DECK
B
Procedure:
Mode:
FWD
playback
speed
checker
or
digital
frequency
test
tape
WS-48B
counter
3kHz,
OdB
esaee
47kO
SE
walk
LINE
OUT
1.
Connect
pin
to
with
the
lead
wire.
(CNP505)
Measurement
limit
:
high
speed
Speed
checker
Digital
trequency
conter
0+0.3%
5960
+
20Hz
Frequency
difference
between
the
beginning
and
the
end
of
the
tape
should
be
within
1.5%
(90Hz).
—
4
—
Adjustment
location:
DECK-A
side
RV501
DECK-B
side
RV503
2.
Remmove
the
wire
in
step
1.
(CNP505)
Measurement
limit:
normal
speed
|
Speed
checker
Digital
trequency
conter
040.3%
|
2,980
+
10Hz
|
Frequency
difference
between
the
beginning
and
the
end
of
the
tape
should
be
within
1.5%
(45Hz).
Adjustment
location:
DECK-A
side
RV502
DECK-B
side
RV504
3.
If
the
specifications
are
not
satisfied,
repeat
step
1
and
2.
PLAYBACK
LEVEL
ADJUSTMENT
DECK
A/DECK
B
Procedure:
Mode:
FWD
playback
test
tape
P-4-L300
(315kHz,
OdB)
be
LINE
OUT
Adjust,
DECK-A
side
RV101
(L-CH),
RV201
(R-CH)
DECK-B
side
RV102
(L-CH),
RV202
(R-CH)
so
that
the
specifications
are
satisfied.
Measurement
limit
:
LINE
OUT
level:
0.44V
(—5dB)
level
difference
between
the
channels:
within
0.5dB
RECORD
BIAS
ADJUSTMENT
|
DECK
B
Setting
:
TAPE
SELECT:
TYPE-I
(DECK-B)
Procedure:
1.
Mode:
record
tar
OSC
blank
tape
oa
CS-123
Pell
lak
T1000%
1,000
J
a]
a
LINE
IN
1)
315Hz
>}
0.025V
(—
30dB)
2)
10kHz
2.
Mode:
playback
recorded
portion
LINE
OUT
Playback
the
tape
recorded
in
step
1.
If
the
specification
is
not
satisfied,
adjust
CT301
and
repeat
steps
1
and
2.
Measurement
limit
:
The
LINE
OUT
level
of
10kHz
signal
relative
to
that
of
315Hz:
—0.5dB
to
0.5dB.
RECORD
GAIN
ADJUSTMENT
|
DECK
B
Setting:
TAPE
SELECT:
TYPE-I
(DECK-B)
Procedure:
1.
Mode:
record
AF
a]
blank
tape
10ka
CS-123
attenuator
“sale
6000
LINE
IN
315Hz,
0.25V
(-—10dB)
2.
Mode:
playback
recorded
Portion
b=
LINE
OUT
play
back
the
recorded
in
step
1.
If
the
specification
is
not
satisfied,
adjust
RV103
(L-CH),
RV203
(R-CH)
and
repeat
steps
1
and
2.
Measurement
limit
:
LINE
OUT
level:
0.44V
(—5dB)
Adjustment
Location:
Audio
Board
Conpoment
side.
RVIOI
RV201
RV102
RV202
——
_1C304
RV501
RV503
ey)
Sy)
RV504
RV502
A
CT30!
es
6
lee
RV103 RV203
CNPS5O5
L-CH
R-CH
TC-W345
SECTION
4
DIAGRAMS
4-1.
PRINTED
WIRING
BOARDS
«See
page
13
for
Semiconductor
Lead
Layouts.
ai
Or
Oe
On
i
I
Ie
is.
<
16.0
te
ek
6
Oe
A
20
8
¢
Semiconductor
Location
é
DECK
A
DECK
B
|
Location
||
Ret.
No.
|
Location
[
SWITCH(A)
BOARD]
SWITCH(B)
BOARD]
A
M90!
Roel
EE
M902
B-5
B-5
MOTOR
MOTOR
B-5
C-3
B-5
1-16
B-4
G-16
r_
B-4
H-16
F-13
HP9OI
PLAY
BACK
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SECTION
5
EXPLODED
VIEWS
a
The
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|
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critical
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delay
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number
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16
Ref.No.
Part
No.
Description
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|
Ref.No.
Part
No.
Description
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1
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LID
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7
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8
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1-558-945-21
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US)
9
1-548-596-61
COUNTER,
TAPE
(MIDDLE
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1-696-966-21
CORD,
POWER
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10
3-499-042-XX
BELT,
COUNTER
26
4-951-620-11
SCREW
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11
3-701-437-11
WASHER
27
3-704-366-01
SCREW
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12
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WASHER,
STOPPER
29
4-951-620-01
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13
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B)
*
31
A-2006-264-A
AUDIO
BOARD,
COMPLETE
14
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CND,
E,
US)
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BOARD)
*
3]
A-2006-619-A
AUDIO
BOARD,
COMPLETE
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15
3-318-688-31
FOOT
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AUS,
E)
(Including
HEADPHONE/METER
BOARD)
15
3-318-688-51
FOOT
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(CND,
US)
16
4-923-836-21
CUSHION
A\32
1-569-007-11
ADAPTER,
CONVERSION
2P
(E)
*
17
4-943-088-31
CASE
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AUS)
*
33
3-549-452-00
PULLEY,
SHUT-OFF
*
18
3-327-855-01
COVER
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A\S101
1-570-307-11
SELECTOR,
POWER
VOLTAGE
(VOLTAGE)
(E)
A\T901
1-449-682-11
TRANSFORMER,
POWER
(E)
*
19
1-574-727-11
WIRE,
FLAT
TYPE
(9
CORE)
*
20
1-574-725~-11
WIRE,
FLAT TYPE
(17
CORE)
AXT901
1-449-683-11
TRANSFORMER,
POWER
(CND,
US)
21
X-4941-291-1
FOOT
ASSY
(F58175S)
(CND,
US)
AT901
1-450-610-11
TRANSFORMER,
POWER
(AEP,
AUS)
21
X-4941-292-1
FOOT
ASSY
(F58175S)
(AEP,
AUS,
E)
.
*
22
3-346-265-31
HOLDER,
PC
BOARD