Sony TC-204SD User manual

Power requirements:
Power consumption:
Recording system:
Tape speed:
Fast forward and
rewind time:
Record Bias
frequency:
Signal to noise
ratio:
Total harmonic
distortion:
Frequency response:
SPECIFICATIONS
100, 110, 120, 127, 220 or 240V ac,
50/60 Hz (E and AEP Model)
240V ac, 50Hz (UK Model) Inputs:
8W
4-track 2-channel stereo
4.8cm/s (1-7 ips)
Approx. 90 seconds (by C-60)
Outputs:
105 kHz
DOLBY NR OFF
With Ferri-Chrome Cassette
59 dB at peak level (NAB)
50 dB (DIN)
With chromium dioxide cassette
55 dB at peak level (NAB)
With regular cassette
53 dB at peak level (NAB)
DOLBY NR ON
Improved 5dB at 1 kHz, 10 dB above 5kHz
1.7%
DOLBY NR OFF
With Ferri-Chrome Cassette and chromium
dioxide cassette
20-16,000 Hz (NAB)
40-15,000 Hz +3 dB (NAB)
40-15,000 Hz (DIN)
With regular cassette
20-14,000 Hz (NAB)
40-12,000 Hz (DIN)
‘Dolby’ and the double-D symbol are the trade marks
of Dolby Laboratory Inc.
Noise reduction system
Manufactured under license from Dolby Laboratory Inc.
Wow and flutter:
Record/playback connector:
Dimensions:
Weight:
0.09 % (RMS. weighted NAB)
+0.2 % (DIN)
MIC (phone jacks) .......cccceeesesseereeree ee 2
sensitivity -72dB (0.2 mV)
for low-impedance microphone
LINE
IN
(stereo
binaural
jack)
..........
1
(PhONO jacks) ........eceeeeee eee 2
sensitivity -22dB (0.06 V)
input impedance 100 k2
LINE
OUT
(phono
jacks)
.......ceeeeee
2
output
level
OdB
(0.775
V)
at
load
impedance
100
k2
with
LINE
OUT
level
control
at
“10”
suitable
load
impedance
more
than
10
k2
HEADPHONES.
........c:seeeeeeeereeeeerentnee
ott
1
suitable
load
impedance
8
22
Input impedance fess than 10 kQ
Output impedance less than 10 kQ
Approx. 430(w) x 160(h) x 325(d) mm
16 7h(w) x 6 14(h) x 12 34(d) inches
Approx. 8kg (17 tb 10 0z)
SERVICE MANIIAL

TC-204SD
SECTION 1
OUTLINE
1-1. BLOCK DIAGRAM
D3
a
Nay,
LINE IN HEADPHONES
FRONT Vx? METER AMP
LINE IN [Qe WW
(STEREO)
LEVEL
METER
MIG
Q103, 104, 106}
LINE
R181 By
LINE QUT
RPH101 =~
R405
PLAYBACK
LEVEL
y
PB EQ
T301
VOLTAGE _ | D801~304
REP es B+ REGULATOR =| Se
Q301 =» POWER Ac IN
oe
MOTOR
SERVO. my
D 3
MOTOR 306~309
D-O13F
1-2. NOTES ON THE MOLDED CHASSIS
The TC-204SD uses a molded chassis. The
following notes should be taken in serving the set.
1) Use the Diamond Oil No. 440 or equivalent.
2) Use the SONY Grease No. SG-101 or equivalent.
3) Do not tighten PTPWH washer-head self-tapping
screws excessively. Use larger-size(larger diameter)
screws when the screw holes of the molded
chassis becomes loose.
4) The spring which winds round the capstan-shaft
bearing should contact between the reel-table
frame and the pinch roller for the chassis-ground-
ing purpose.

TC-204SD
SECTION 2
ADJUSTMENT
2-1.
MECHANICAL
ADJUSTMENTS
Head
Height
Adjustment
1.
Make
an
adjustment
cassette
as
shown
below.
ome
=
Cut out hatched
portions.
C-120
tape cassette
2.
Viewing
from
the
top,
tape
curl
and
tape
bends
should
not
exist
at
the
arrowed
portions.
—
Playback
Mode
—
teas
erase
head
pinch
roller
record/playback
head
3.
When
a
tape curl
exists
at
the
record/playback
head,
adjust
the
head
height
by
using
adjustment
shim
or
washer.
record/play back
head
adjustment shim:
3-§13-237-01
t=0.1mm
1
3-513-237-1711
t=0.2mm
|
es)
2
—
adjustment shim or washer
4.
When
a
tape
curl
exists
at
the
erase
head,
adjust
the
head
height
by
adjusting
the
screw
at
the
tape
guide
side.
Fast
Forward
and
Rewind
Torque
Adjustment
Specification:
Fast
Forward
and
Rewind:
55—95
g-cm
(0.77—1.32
oz-inch)
If
necessary,
bend
the
spring
as
shown
below.
flywheel
spring
Back Tension Torque Adjustment
— Playback and PAUSE modes —
tape cassette
for adjustment
Wrap tape 10 turns.
oN
A( YS
/ ‘ /
Ke eee
,
\
Cut out here.
2.5~49-cm (0.03~0.06 oz: inch)
at 4.8cm/s (173 ips)
209 tension gauge
Unplug power cord and adjust spring hooking
position to obtain the specified value.
supply reel spindle.
adjust spring
hooking position.
tension lever

TC-204SD
2-2. ELECTRICAL ADJUSTMENTS AND
MEASUREMENTS
PRECAUTION
1. Clean the following parts with an alcohol
moistened swab: ;
* record/playback head * pinch rollers
* erase head « rubber belts
* cap stans * idlers
2. Demagnetize record/playback head with a
head demagnetizer.
3. Do not use magnetized screwdriver for
adjustments.
4. After the adjustments, apply a small amount
of a locking compound to the parts adjusted.
5. The adjustments should be performed in the
order arranged in this service manual.
6. The adjustments and the measurements
should be performed for both L-CH and R-CH
with rated power supply voltage unless
otherwise specified.
7. The record and playback level adjustments
should be carefully performed.
8. Tapes required:
1) blank tapes (completely erased with bulk
eraser)
SONY CS-10 (HF)
CS-20 (CrO2) with two extra holes
CS-30 (Fe-Cr)
2) test tapes
SONY P-4-A81S (6.3 kHz, -10 dB)
P-4-A82 (10 kHz, -10 dB)
P-4-L81 (333 Hz, 0 dB)
WS-48 (3 kHz, 0 dB)
9. The switches and the controls should be set
as follows unless otherwise specified.
DOLBY NR switch: OFF
LIMITER switch: OFF
LINE control: MIN
MIC control: MIN
TAPE SELECT switch: NORMAL
LINE OUT control: MAX
10. Standard record:
Supply the specified input signal level to the
input jack and set the MIC or LINE control
to obtain the specified output signal level.
Set the LINE control to MIN when MIC
input is used or set MIC control to MIN
when LINE IN is used.
Normal Input Level
die
3000 10K
input level Svnde ~104B
(0.77 mV) (0.25 V)
Normal Output Level
Pine ou]
load impedance 100 kQ
0dB
Tape Speed Adjustment
Procedure:
Mode: Playback
speed checker
SONY LMF-30
WS-48
(3kHz, 0dB)
LINE OUT
WS-48 sat
(3kHz,
OdB)}
digital
frequency
counter
LINE OUT
Adjust R602 (R607) to obtain specified value.
Specification:
speed checker digital frequency counter
Frequency difference between beginning and end
of tape should be within | % (30Hz).
Adjustment Location:
R602
(R607)
servo board
R607: Serial No. 17651 and later (E Model)
Serial No. 15651 and later (AEP Model)
Serial No. 17151 and later (UK Model)

_TC-2045D _
PAUSE Timing Adjustment
— Stop Mode —
1.
The
take-up
reel
and
the
pinch
roller
should
stop
at
the
same
time.
If
necessary,
bend
the
spring
as
shown below.
pinch roller (lo 0)
;
Adjust by bending here.
Motor
Switch
(S603)
Position
“Adjustment
—
Stop
Mode
—
1.
Loosen
the
adjustment
screw
and
adjust
the
switch
position
so
that
the
switch
leafs
becomes
6
+0.5mm
(1342)
as
show
below.
_
After
the
adjustment,
secure
the
screw
with
a
suitable
looking
compound.
motor switch (S603)
adjustment
screw
brake release plate
Muting Switch (S602) Position Adjustment
— Stop Mode —
1. Loosen the adjustment screw and adjust the switch
position so that the gap of the switch contacts
becomes 1.0 + 0.5 mm.
1.040.5mm muting switch (S602)
contact
record lock plate
Timing Switch (S601) Position Adjustment
— Stop Mode —
1. Loosen the adjustment screws and adjust the posi-
tion of the timing switch circuit board so that the
muting lever just contacts the switch hole and the
switch starts to move.
2. After the adjustment, secure the screws with a
locking compound.
timing switch
(S607)
adjustment screw
adjustment
screw

TC-204SD
MEMO

oe
|
T¢C-204SD
TC-204SD
|
thas
4. Playback Equalizer Adjustment 6. Record Level Adjustment
3. Playback Level Adjustment
2. Record/playback Head Azimuth Adjustment
Procedure: Procedure: Procedure: Procedure:
1. Mode: Playback 1. Mode: Playback 1. Mode: Standard record (See page 6 .)
1. Mode: Playback
P-4-L81
TAPE
SELECT
switch:
NORMAL
af
oie
ne
(333
Hz,
0
dB)
P-4-A82
chy
ose
(10kHz,
-10aB)
10kQ.
oO
attenuator
P-4-A81S
otto
Mi
psezoke)
-A81
(6.3kHz, -10dB)
O
LINE OUT
2dB (0.95 V) LINE OUT ei, 1081026 Vi
: rede 2. Mode: Playback
Adjust R125 (L-CH) and R225 (R-CH) to obtain _ Mode: Playback racers . ie
portion
2 dB (0.95 V) VTVM reading.
TAPE SELECT switch: CrO2 or Fe-Cr
. Assure that the LINE OUT level does not change
when the mode is changed from playback to stop
several.times.
P-4-A82
(10kHz, -10dB)
LINE OUT
kE
OdB (0.775 V)
Adjust R153 (L-CH) and R253 (R-CH) to obtain
0dB (0.775 V) VTVM reading.
3. Change the blank tape to CS-20 and CS-30, and
perform the same record and playback procedure.
Measure LINE OUT level.
Specification:
LINE OU
LINE OUT level: 1.5~2.5 dB T
-9.5dB (0.26 V)
(0.92 ~ 1.05 V)
Level difference between channels:
adjustment
|
in
phase
aoe
less
than
1
dB
Adjust
R124
(L-CH)
and
R224
(R-CH)
to
ee
Y)
“
O
eer
on
obtain
the
LINE
OUT
voltage
2.5-6.5
dB
lower
fenhase rac og phase (B-CH) than that obtained in step 1 above.
patter (L) (R) (L)(R)
around the (Fe Pa Sh ny
highest Level drop
VTVM should be within
readings. 0.5 dB.
Oscilloscope patterns
azimuth [Allowance]
Specification:
SONY tape LINE OUT level
eae -0.5 ~+0.5 dB
(0.74 ~ 0.84 V)
Note: If R124 and R224 are moved too much,
repeat the playback level adjustment on
page 7.
.
Assure
that
LINE
OUT
level
difference
does
not
5.
VU
Meter
Calibration
change when the mode is changed from playback
to stop several times. Procedure:
R253
(R-CH)
R153
(L-CH)
1. Mode: Standard record (See page 6.)
af osc
ey VTVM
attenuator 10 kQ 100 kQ. Ee
O
. After adjustment, apply locking compound to the
screw.
record/playback
+ @
pinch roller
LINE OUT
LINE
IN
OaB
(0.775
V)
333 Hz, -10dB (0.25V)
adjustment
screw
2. Adjust R145 (L-CH) and R245 (R-CH) to make
OVU indication.
Specification:

SD TC-204SD |
4. Playback Equalizer Adjustment
Procedure:
1. Mode: Playback
TAPE SELECT switch: NORMAL
P-4-A82
(10kHz, -10dB)
LINE OUT
—5 0B (0.44 V)
2. Mode: Playback
TAPE SELECT switch: CrO2 or Fe-Cr
P-4-A82
(10kHz, -10dB)
LINE OUT
~9.5dB (0.26 V)
Adjust R124 (L-CH) and R224 (R-CH) to
obtain the LINE OUT voltage 2.5-6.5 dB lower
than that obtained in step 1 above.
Note: If R124 and R224 are moved too much,
repeat the playback level adjustment on
page 7.
5. VU Meter Calibration
Procedure:
1. Mode: Standard record (See page 6.)
af ose
€°) VTVM
attenuator 10 kX 100 kQ. #4
oO
LINE OUT
OdB (0.775 V)
LINE IN
333 Hz, -10dB (0.25V)
(@,)| 2. Adjust R145 (L-CH) and R245 (R-CH) to make
OVU indication.
Specification:
6. Record Level Adjustment 7. Record Bias Adjustment
Procedure: Procedure:
1. Mode: Standard record (See page 6 .) 1. Mode: Standard record (See page 6 .)
af osc
af osc blank tape blank tape
€)
SONY
CS-10
€)
SONY
CS-10
Oo
attenuator
Oo
attenuator
oe —_—_—_—_
EAC)
N
333 Hz, —10dB (0.25 V)
LINE IN
1. 1kHz, -10dB (0,25 V)
2.
Mode:
Playback
2
10kHz,
-10dB
(0.25
V)
recorded
portion
LINE OUT
k
OdB (0.775 V)
Adjust R153 (L-CH) and R253 (R-CH) to obtain
0 dB (0.775 V) VTVM reading.
. Change the blank tape to CS-20 and CS-30, and
perform the same record and playback procedure.
Measure LINE OUT level.
2. Mode: Playback
recorded
portion
LINE OUT
Adjust C154 (L-CH) and C254 (R-CH) to obtain
10 kHz-signal level 0.5 dB lower than that of 1 kHz.
Specification:
SONY tape LINE OUT level
ei A -0.5 ~+0.5 dB
Note: When 10kHz output level is too low,
turn the trimmer capacitor counter-
clockwise.
10 kHz signal level is
0dB + 1 dB lower
than that of 1 kHz
signal.
Specification:
CS-20
a0 (0.74 ~ 0.84 V)
C154
(L-CH)
R253 R153
(R-CH) (L-CH)
8. 19kHz Filter Adjustment
Procedure:
1. Mode: Standard record (See page 6 .)
af osc
©) attenuator
oO
LINE OUT
MIC
19 kHz £20 Hz
(-60 dB, 0.77 mV)
Adjust L105 (L-CH) and L205 (R-CH) for
minimum VTVM reading.
TC-204SD

TC-204SD
|
4
|
T¢c-204SD
_TC-204
SECTION 3
DIAGRAMS
Note:
3-1. MOUNTING DIAGRAM @ B+ pattern Serial No.
. E Model Up to 17650
— Conductor Side — AEP Model Up to 1565
. :
UK
Model
Up
to
1715¢
[SERVO AMP BOARD]
i918
rc
)
—~{
20~28
29~32 > 29~32
*
i
aa
hts
‘
[AUDIO
AMP
BOARD]
‘
2
urine
wur/ver
|
WHT/6RW
15,
Ri8i, 281
LINE OUT BRN EL
“4
‘si PL4 PL3 PL2
REC TAPE METER
|WHT/BLK
40,
41
WHT/BRN 1302
HEADPHONES:
ren
he
7301
BRN
C309
ob 1
F | Pp comes cael a Poy
—{29~35 -—— a {29-31
32 Be 38
VY
O g 3 PLS
20 (reo) =) o| SI (S) doce we
a Neal een ton s] g} Fa f (SWITCH
&
WHT/BLK ensor Kok ne
(EFI35-36) “Torey
(REDD
22) WHT
WeRY) (RED)
WHT 4
RED
9
RED =>
[> art te
(WHT) (WHT)
RPHIOL. 201 Gery)) tery)
(PF145-3602A)
50 N28
VU METER(L)'
BRN) (YEL!
50,51) ~<50, 51 EL
scone
21> REO
16 17
£16, 17
WHT WHT/ EBLK
86 TAPE
BIAS ——— SELECT
Low N
WBRND) (GRY)
S3 DOLBY NR ON(FILTER OFF) SS LIMITER ON NORM F
RUB, 213 RI, 21 a t
vv OFF HIGH c
SOKtA) 20K (A) OFF

TC-204SD TC-204SD S<
vt : Note:
Serial No. a
E Model 17651 and later
AEP Model 15651 and later
Note:
Note:
UK
Model
17151
and
later
;
Serial
No.
B+
pattern
E
Model
Up
to
17650
AEP
Model
Up
to
15650
’
UK
Model
Up
to
17150
Q
CSERVO AMP BOARD
[SERVO AMP BOARD]
20~28 TAPE_SPEED
neocon
ORG 4VIO vio
4
(nokta,
Qe 9) (OOOO)
©B®D 0)
69
MOOD)
Op®
FI
98, fOWER 160m4
o
lial an Ce
Co
Q102, 202
Q103, 203
} 2SC632A
[E MODEL]
Q303~305
Q110~112
Q210~212 ; 2SC634A
Q104~108
Q204~208 Q302: 2S8C1384 1C101, 201: CX-064
(UK AEP MODEL)
—
/ PLAN oh AR,
:
EcR,
10111213141516
1718
CN F
(Top view}
Q101, 201 2501362 Q301: 2SC1760 IC601: CX-065
Q109, 209 Q601
2
Q601, 602: 2SC1363 pee etal
WHT/BLK
vio
WHT/Vio.
3
c
ae “K) 12345678
E y Hf €
z
\
CX-O65A
OLB: BoE
ee 30, D101, 201 234564
POLANBRNY
D103,
203
;
1T40
D301~304
$1B01-02
pewio)20
D310,
312,
313
D306~309
D102, 202: 1T22 D305: EQA01-02R D311: SLP2?4B
WHT
(99
cathode
cathode
(BLU) BRND -
ok cathode. ande
ay
i
GD
oh
ae
anode anode
cathode
mode
x sé TAPE
BIAS ——— SELECT. £@
Low pis
$3 DOLBY WR SOMIETLTER OFF) SS LIMITER ON NORM FeCr
oN
OFF HIGH Cr
or q

3-2. SCHEMATIC DIAGRAM
C102
41/25V
Q109 ZR
2SC1362 ioe
101
Mic
R102 15k
Clol
oot
“a
i Paes 120k
R104
2.2k
ROG 3Z0K(NI| EV
IV
RUIZ. 50k (A)
UNE IN | R283
120k
(R)
| [AUDIO AMP BOARD] L-CH
QiOl 281362 al02 2SC632A
TC-204SD
TC-204SD
Q106 2SC634A
{ SWITCH BOARD ) L-CH vader
>
$5-1 oN
ee S31 us ONO = OFF
EQ DOLBY NR OFF (FILTER OFF)
CrO2——-Fe-Cr =-NORM oY =— ON-OFF
(FILTER OFF)
ok: age, aN
| R395
47k
ey ~ "Thes 100K $ 1 Y—di0s ascé32n Q104 25C634A “0105 2scesaa bide 1122
7 1
C10 CX-064 at to r 01 IT40
859 1/50 Lt
RI68
3.3k | 120k
RIG4
t
cll4 0056
CIS5 10/16V
——_{h-
C4501 R198 2.2k
C140 47/10V
eT
R
cur
68
Ci
0.0033
Cu9 0.0022
(yr
ci2e | Ct)
OA7/S0V| O6v-”
ate — |}
ort TSS,
% C138. 82p 5OOV | PLAYBACK y¥V
Rrustecon
|
|
Se"
i
:
S-4 S83
QI08
R308
S| REC/PB_ 2108 2scs344 “i
PLAYBACK PECORD
0.01/100V
EH 301
EFI35-36 4 C306
3 0.015
‘a | 100vV
{RO
LINE OUT | RIO
Kk
R310
22k
RI3t
18k |
Sh 3I0 1740
a
R315 R316
33k
33k
RI45 47k
RIB} 20k] (8)
stor LINE OUT
s60}-1 PRYBA
33)
(IG
201 wi
mic(RL
C201
001 Ae
' L
R-CH ‘
| CMIC_AMP_BOARD }
Note:
©
All
capacitors
are
in
uF
unless
otherwise
noted.
50
or
less
e
working
volts
are
omitted
except
for
electrolytic
type.
e
p=
wuF
e
e All resistors are in 2, % W, unless otherwise noted.
k=1,000 M=1,000k
Rooo
Rooo
°
ook = ookQ
(2%)
(42%)
e
REF NO-- FROM 201
RPH 201
PFI45- 36024
i; lea AS L-CH )
=
© jew
R392
120
(ew)
R393
270
(vew)
13
(N) indicates a low-noise resistor.
wumme indicates B+ circuit.
Voltages are DC with respect to ground unless otherwise
noted. Readings are taken under no-signal conditions with
a VOM (20k9/V). Readings in [| | are in record mode.
Voltage variations may be noted due to normal produc-
tion tolerances.
AC voltage readings on bias oscillator circuit are taken
with a VITVM.
e@ Switch Mode
%* REC/PB (L-CH)
%* REC/PB (R-CH)
DOLBY NR
TAPE SELECT EQ
LIMITER
* REC: record
PB: playback
~ §2-9
Q603 2SCI76I Q602 2SC1363
302
I} HADEPHONES
"309 0.00!
Note:
Serial No.
E Model 17651 and later
AEP Model 15651 and later
UK Model 17151 and iater
oe 4s Note:
i Serial No.
E Model Up to 17650
r AEP Model Up to 15650
UK Model Up to 17150
I
1 7301
t POWER
TRANSFORMER
a
03032 ne
BRN HOV
4
ON(FILTER 0
Lu en
299 | br nee
PU PB DOLBY NR $3-2
<VOLTAGE CONNECTION)
TAPE SELECT BIAS
TIMING
MUTING
MOTOR
POWER
en

TC-204SD TC-204SD
SECTION 4
EXPLODED VIEWS
4-1,
|
|
{
i X-3544-506-0
| Case Ass’y, wooden
|
Pte
ee
:
i \ 3-544-523-00 1-526-528-00 {
i
1-518-115-XX
Panel,
rear
Outlet,
ac
3-701-682-00
|
Lamp, tape i] Strain Relief, power cord
i BAX 25 | RQ ie :
) PRR) Ra he Se RB Ls ak
| SIT
| |
| | |
|
|
|
u 1-534-487-00 (E model)
| 1-534-819-00 (UK model)
_D PSW 3x6 < | Cord, power
B 4x25 |
AS
2.051-912.00
das
ae
3-434-212-00 Cover, top
Clamp (A), lead wire
Felt, top cover 3-513-211-00
i U
3-422-204-00 Lable, DOLBY NR
| IB ig TINK Heat Sink Label (B), caution (UK model only) ;
i -518-115-. 3-544-522-00 (E model}
| Holder, lamp Lamp, meter A-2020-047-A _ ; 3-544-524-00 (AEP, UK model)
| PTT 3x6 Complete Circuit Board, audio Label, specification
i 3-544-529-00
| h Panel, ara cl)
: \ (AEP, UK mode
i 7-623-508-01 je
3.534-863-00
Lug
\p
Paper.
‘stele
4-812-134-00
Cushion
Sees
Rivet,
plastic
| scarry Back B 1-442-191-00 (E model)
|
rinted
Circuit
Board,
LED
AES.
mode
Hl
1-442-170-00
(AEP,
UK
model)
7
2.068-009-00
| Bracket, chassis Transformer, power 7-623-508-01 is is i Nut, screw terminal
: Lug, e hae
| DANY 2.068-007-00
i PTT 3x6 7 Screw Terminal, ground
I 1-532-078-00 racket, circuit board; fuse
Cover,
VU
meter
Fuse,
1A
,
(AEP,
UK
model
only)
2-068-008-00
i
PIP
26x6
"
(AEP,
UK
model
only)
1-509-427-12
(E
mocel)
Washer,
screw
terminal
1-516-315-00
:
A-2022-005-A__
.
1-532-074-XX
S
1-509-482-00
(AEP,
UK
model)
|
Switch,
rocker;
POWER
(S8)
Complete
Circuit
Board,
mic
amp
Fuse,
200
mA
(F2)
>
a
selector
i
1-507-415-XX
y
ia)
1-224-431-00 Jack, binaural; HEADPHONES (J302) PIT3x6 \
i
Resistor,
variable;
20
k
(B)
3-472.278-00
Dy
&
ra.
B
278: A 3 E
: INE OUT (R181,:281/ hog 4:2023-094-4 ; Clamp, lead wire 5 AF és ‘ 1-507-433-00 3-701-760-00
b+, Complete Circuit Board, switch ON —~_ j 6 ¢ Jack, phono; 4p Nut, screw terminal
j " 1-509-546-00 (LINE IN/LINE OUT)
( Connector, AC IN; 3p A-2025-030-A ~~
yy | . = BOT MEK 4-8:12-134-00 (AEP, UK model only) Complete Circuit Board, line in/out
Jack,
binaural;
:
ty
ee
i
PSW
3x6
p
4
Rivet,
plastic
EINES
IN
(301)
(AEP,
UK
model
on
Ly
{
BX
y
'
i
co
Rod,
record
i
PTT
3x6
A-2021-019-A.
|
Zh
!
PS
3x5
nh
Complete
Circuit
Board,
fuse
i
Supplied
with
variable
resistor
3.707-808-00
-~4-507-448-00
(AEP,
UK
model
only)
|
‘
S : A Cover: encatsilsted Jack, stags sek (J101, 201) 2 H
SY Supplied with “51 . Plate, record
. Switch, lever/slide; é
8 . HEADPHONES/LINE IN DOLBY NR/LIMITER/EQ/
DS BIAS (S3~6)
PTT 2.6x5 954700 08 4-812-499-XX
<1 & Resistor, variable; 50k (A), LINE Spring 163) 26
. P 113,
X-3504-504-1
Ne
Boe
1-224-701-00
Knob Ass’y, LINE OUT A. Resistor, variable; 20k (A); MIC
SD Ze (R111, 211) X-3544-502-0
O ‘ 1-520-241-21 Arm (B) Ass’y, record
iN) dy Meter, VU 3-465-184-00
S 5 . . Absorber, noise
N Aly PTT 3x6 Supplied with MIC jack paca JA
QA 3-451-128-00 Subchassis, front X-3544-501-0
<& WS) Spacer (A), insulation; Arm (A) Ass‘y, record*
Ls ay S jack; LINE IN
Q
neN
Se
.
Py
Plate,
bottom
3-544-513-00
:
N,
'
PS
2.6x5
Spring
(AEP, UK model. only)
3-465- 184-00
Absorber, noise
SF
X-2047-209-6 \ DN JS ae
Knob Ass’y, POWER/DOLBY NR/ Supplied with variable resistor I
,
(6
3-472-233-00
PTT
3x6
LIMITER/BIAS/EQ
go)
Sia)
statin
ck
;
SN
7
i
pn
ef
8
: X-3544-505-1 (AEP, UK model} WX a a le | X-4089-£08-X ° PS 4x14
:
X-3544-505-2
(E
model)
WY
£08.
Knob (B) Ass’y, MIC/ LINE ) © Foot Ass'y
: X-3544-507-2 (E model)
X-3544-507-3 (AEP, UK model) X-3544-508-1
Panel Ass’y Escutcheon Ass'y, VU meter
: see 4) (aera ml
. : le . er
ip
Note:
o
Items
without
part
number
and
description
Knob (C), MIC/LINE
are not available.
o All screws are Phillips (cross recess) type
unless otherwise noted.
(-) =slotted head
© (QOT) shows the number of coils in spring.

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| Te-2048D
4-4.
X-3544-004-1 (Canada model)
X-3544-004-2 (PX, USA model}
Lid Ass’y, cassette
E25
Ce
ts
B2x3
r
Fide ec ‘ B2x3
Holder Ass‘y, cassette
Stopper
3-543-906-00
Lever, lock
E25
B26x4
3-543-917-00
Guide
{L),
cassette
3-491-201-00
Rubber, stopper
—
3-543-920-00
Spring
(A),
cassette
3-543-916-00
Guide (R), cassette
\
3-§43-920-00
3-491-201-00
nA
Spring
{A},
cassette
Rubber,
stopper
oe
E25
|
ae
Protector,
cassette
‘ B2x3
1
B2x3
Spring (B), cassette
£25
5,
|
“~e@
~~
2.
3
Za
Sale
|
¢/
[Af
[em
>
iS Oe
3-541-238-00
Spring
included in cassette holder Ass‘y
X-3543-904-0
Arm Ass‘y, cassette holder
IHumination,
cassette
lamp
7-632-202-50
Tape, aluminum
Note:
o
Items
without
part
number
and
description
‘are
not
available.
o
All
screws
are
Phillips
(cross
recess)
type
unless
otherwise
noted.
(-)
=slotted
head

TC-204SD
SECTION 5
ELECTRICAL PARTS LIST
Ref. No. Part No. Description
COMPLETE CIRCUIT BOARDS
A-2021-019-A fuse (AEP, UK model)
A-2020-047-A audio
A-2022-005-A mic amp
A-2023-094-A — switch
A-2025-030-A line in/out
servo amp: See page 24.
SEMICONDUCTORS
Transistor
Q101,201 28C1362
Q102,202
2
103,203 SC632A
eas 2SC634A
Q204~208
Q109,209 2S8C1362
Q301 2SC1760
Q302 2SC1384
Q303~305 28C634A
Q601,602 28C1363
Q603 28C1761
1C101,201 Integrated Circuit CX-064
Diode
Di01,201 1T40
D102,202 1T22
D103,203 1T40
D301~304 SIBO1-02
D305 EQA01-21R
D306~309 SIB01-02
D310 1T40
D311 SLP24B
Thé01 1-800-200-11 Thermistor, S-3K
Ref. No.
1L104,204
L105 ,205
1L106,206
L191,291
L192,292
L193,293
T101,201
T301 {
T302
C101,201
C102,202
C103,203
C104,204
C105 ,205
C106,206
C107,207
C108,208
C109,209
C110,210
C111,211
C112,212
C113,213
C114,214
C115,215
C116,216
C117,217
C118,218
Part No.
Description
COILS
1-407-212-XX
1-407-240-00
1-407-211-XX
1-407-203-XX
1-407-202-XX
1-407-201-XX
33 mH microinductor
22 mH, variable inductor
27 mH, microinductor
5.6 mH microinductor
4.7 mH microinductor
3.9mH microinductor
TRANSFORMERS
1-427-284-00
1-442-170-00
1-442-191-00
1-433-132-14
output
power (AEP, UK Model)
power (E Model)
Bias osc
CAPACITORS
1-101-455-11
1-121-410-11
1-121-651-11
1-102-074-11
1-121-398-11
1-102-106-11
1-102-074-11
1-121-913-11
1-121-404-11
1-107-123-11
1-121-395-11
1-121-927-1411
1-108-813-12
1-108-798-12
1-108-814-12
1-107-127-11
1-129-794-11
All capacitors are in uF unless otherwise indicated.
50 or less working volts are omitted except for
electrolytic type. (elect = electrolytic, p =zyuF)
0.001 cermic
47 25 V elect
10 16V elect
0.001 cermic
10 25V elect
100p cermic
0.001 cermic
3.3 25V elect
33 25V elect
47p
4.7 25V elect
47 10V elect
0.056 mylar
0.0033 mylar
0.068 mylar
68 p
0.0033 100V plastic
silvered mica *
silvered mica

Ref. No.
C119,219
C120,220
C121,221
C122,222
C123,223
C124,224
C125 ,225
C126,226
C127,227
C128,228
c129,229)
C130,230
C131,231
C132,232
C133,233
C134,234
C135,235
C136,236
C137,237
C138,238
C139,239
C140,240
C141,241
C142,242
C143,243
C144,244
C145 ,245
C146,246
C147,247
C148,248
C149,249
C150,250
C151,251
C152,252
C153,253
C154,254
C155,255
C191,291
C192,292
Part No.
1-108-829-12
1-121-391-11
1-102-074-11
1-121-651-11
1-107-125-11
1-121-398-11
1-121-651-11
1-121-726-11
1-121-392-11
1-121-391-11
1-121-726-11
1-121-391-11
1-105-684-12
1-121-450-11
1-121-651-11
1-121-726-11
1-121-395-11
1-102-113-11
1-107-037-i1
1-121-391-11
1-121-352-11
1-121-986-11
1-108-816-12
1-108-810-12
1-131-214-11
1-108-816-12
1-121-479-11
1-121-402-11
1-121-450-11
1-121-651-11
1-121-450-11
1-121-404-11
1-108-816-12
1-108-807-12
1-108-808-12
1-141-069-XX
1-121-651-11
1-108-809-12
1-108-808-12
Description
0.0022 mylar
1 SOV elect
0.001 cermic
10 16V elect
56p silvered mica
10 25V elect
10 16V elect
0.47 SOV elect
3.3 25V elect
1 50V elect
0.47 50V elect
1 50V elect
0.082 mylar
2.2 50V elect
10 16V elect
0.47 SOV elect
4.7 25V elect
390p cermic
82p 500V__ silvered mica
1 50V elect
47 10V elect
2.2 50V elect
0.1 mylar
0.033 mylar
0.68 35V solid tantalum
0.1 mylar
22 16V elect (E Model)
33 10V elect (AEP, UK
Model)
2.2 50V elect
10 16V elect
2.2 50V elect
33 25V elect
0.1 mylar
0.018 mylar
0.022 mylar
20~120p trimmer
10 16V elect
0.027 mylar
0.022 mylar
| T¢-204SD
Ref. No. Part No. Description
C193,293 1-105-523-12 0.068 mylar
C194,294 =: 1-105-525-12. 0.1 mylar
C195,295 1-108-809-12 0.027 mylar
C196,296 1-105-666-12 0.0027 mylar
C301 1-121-388-11 1000 35V elect
C302,303 =—-1-121-733-11 470 25V elect
C304 1-131-214-11 0.68 35V solid tantalum
C305 1-108-626-12 0.01 100V.— mylar
C306 1-108-628-12 0.015 100V mylar
C307 1-129-710-11 0.0047 630V__ plastic
C308 1-121-736-11 1000 10V elect
C309,310 1-101-455-11 0.001 cermic
C311 1-108-837-12 0.01 mylar
C312 1-121-450-11 2.2 50V elect
C313 1-121-391-1111 50V elect
C314 1-121-970-1147 16V elect
C315 1-121-391-11 1 50V elect
C601 1-121-352-1147 10V elect
C602 1-121-651-11 10 16V elect
C603 1-121-413-11 100 6.3V elect
C604 1-121-414-11 100 10V elect
RESISTORS
All resistors are in ohms. Regular type % W carbon
and composition resistors are omitted.
Check schematic diagram for the resistance values.
k=1000, M=1000k
R111,211
R113,213
R124,224
R125 ,225
R145,245
R148,248
R150,250 {
R153,253
R175,275
R181,281
1-224-701-00
1-224-702-00
1-224-641-XX
1-224-646-XX
1-224-644-XX
1-210-874-11
1-210-850-11
1-210-861-11
1-224-647-XX
1-244-868-11
1-224-431-11
20k (A), variable; MIC
50k (A), variable; LINE
470 adjustable
22k adjustable
4.7k adjustable
1.2k YW 2%
300 %W 2% (E Model)
220 ’W 2% (AEP, UK
Model)
47k adjustable
620 “Ww
20 k/20 k (B) variable; LINE OUT

-Tc-204SD
Ref. No.
R301
R302
R303
R391
R392
R393
R602
S8
S601
$602,603
J101,201
J301
J302
Fl
F2
F3
Part No. Description Ref. No. Part No. Description
1-206-662-11 820 2W metal oxide 1-507-433-00 Jack, phono; 4 p (LINE IN/
1-244-817-11 4.7 “Ww LINE QUT)
1-244-821-11 6.8 ww 1-509-546-00 Connector, AC IN; 3p (UK, AEP}
1-509-549-00 Connector, REC/PB
1-244-853-11 150 AW 1-520-241-21 Meter, VU
1-244-851-11 120 “WwW 1-526-528-00 Outlet, ac (E Model)
1-244-859-11_ 270 *W 1-533-102-00 Holder, fuse (E Model)
1-221-663-11 2k adjustable
1-534-487-00 Cord, power (E Model)
1-534-819-00 Cord, power; 3p (UK Model)
1-548-502-21 Counter, tape
SWITCHES 1-582-999-00 Printed Circuit Board, LED
1-514-976-21 Slide, record/playback Gian wee Reece tencee ue oNeease ae case saseee ee
1-516-620-00 Lever Slide, DOLBY NR/ Serial No.
1 LIMITER/EQ/BIAS pirspeaes ig ss Medic 56
t
1-516-315-00 rocker, POWER UK Model Up to 17150
PSEC SI O0. Paver ales, Gniing A-2020-016-A Complete Circuit Board, servo am
1-516-270-00 Leaf, muting/motor
Q601,602 28C1363
Q603 2SC1761
ee C601 1-121-352-1147 10V_ elect
C602 1-121-651-1110 16V_ elect
1-507-448-00 phone, MIC C603 1-121-413-11 100 6.3V elect
1-507-477-XX binaural, LINE IN; front cat 1-121414-11 100 = 10-V_ elect
1-507-415-XX binaural, HEADPHONES
R602 1-221-663-11 2k, adjustable
Th601 1-800-200-11 Thermistor, S-3 k
FUSES Serial No.
{ 1-532-425-00
1-532-079-00
Fuse, 160 mA (E Model)
Fuse, 160 mA (AEP, UK Model)
E Model 17651 and later
AEP Model 15651 and later
UK Model 17151 and later
A-2020-019-A Complete Circuit Board, servo amy
1-532-074-XX Fuse, 200mA (AEP, UK Model) Q601 28C1761
1-532-078-00 Fuse, 1 A (AEP, UK Model) IC601 CX065A
C601 1-121-398-11 10 25V_ elect
C602 1-105-515-12 0.015 mylar :
MISCELLANEOUS C603 1-108-550-12 0.082 mylar
C604 1-121-651-1110 16V_ elect
1-231-057-31 Encapsulated Component C605 1-121-450-11. 2.2 50V_ elect :
8-825-506-00 Head, erase; EF135-36
8-834-013-50 Motor D-013F C606 1-121-970-1147 16V_ elect
1-518-115-XX Lamp, 6V 35mA C607 1-121-395-1147 25V_ elect
8-825-584-00 Head, record/playback; PF145-3602A
1-509-427-12 | Voltage Selector (E Model) R601 1-244-871-31 820 ’W
{ 1-509-482-00 Voltage Selector (AEP, UK Model) R607 1-221-630-00 20k, adjustable

| Te-204sD
SECTION 6
HARDWARE
Part No. Description Part No. Description
SCREWS
WASHERS
All
screws
are
Phillips
(cross
recess)
type
unless
7-623-107-02
2.6
(small)
otherwise
indicated.
(-):
shotted
head
7-623-107-12
2.6
7-623-108-12 3 (middle)
7-621-770-96 B2x8 7-623-108-22 3 (lage)
7-621-772-00
B2x3
7-6
23-207-22
2.6,
spring
7-621-773-65 B2.6x4
7-627-505-69 (-) P2x4
RETAINING RINGS
7-628-254-05 PS 2.6x5
7-628-254-35 PS 2.6 x 10 7-624-101-01 E1.2
7-682-547-09 B3x6 7-624-102-01 E1.5
7-682-646-01 PS3x5 7-624-104-01 E2
7-682-647-01 PS3x6 7-624-106-01 E3
7-682-664-01 PS4x14 7-624-118-01 E2.5
7-682-947-01 PSW 3 x6 7-624-171-51 G3
7-682-948-01 PSW 3x8
7-685-103-21 P 2x5, self-tapping MISCELLANEOUS
7-687-133-21 PTP 2.6 x6
7-687-204-21 PTPWH 2x6 7-623-507-01 Lug 2.6
7-687-205-21 PTPWH 2 x8 7-6 23-5 08-01 Lug 3
7-687-233-21 PTPWH 2.6 x 6 7-632-202-50 Tape, aluminum
7-687-401-31 PTT 2.6x5 7-671-113-01 Steel Ball 3
7-687-411-31 PTT 3x6 7-684-023-01 Nut 3
Part No. Description
ACCESSORIES
X-3701-018-0 Cleaning Tips
1-534-049-51 Cord, connection; RK-74 H
3-780-784-1141 Manual, instruction
3-793-075-14 Card, warranty (E, AEP Model)
3-794-520-82 Card, guaranty (UK Model)
8-890-060-00 Tape, cassette; Fe-Cr; C-60

— Hardware Nomenclature —
Pan Head Screw SC — Set Screw
Pan Head Screw E — Retaining Ring (E Washer)
with Spring Washer
W — Washer
SW — Spring Washer a
LW — Lock Washer
N — Nut
— Example —
P 3x10 7
L-Vength inmm(L)
Diameter in mm (D) Pe
Type of Head
Sony Corporation
© 1975
80G06
9-954-362-01 9G Printed in|