Sony TCS TCS-30D User manual

SERVICE MANUAL
STEREO CASSETTE-CORDER
US Model
Canadian Model
AEP Model
E Model
Chinese Model
SPECIFICATIONS
TCS-30D
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MT-30D-118
Specifications
Recording system
4-track 2 channel stereo
Tape speed
4.8 cm/s or 2.4 cm/s
Frequency range
Recording: 250-6,300Hz
layback: 50-14,000Hz
using nomal (TY E I) cassette
(with REC TIME switch at
“NORMAL”)
Speaker
Approx. 3.6 cm (1
7
/
16
in.) dia.
Power output
350 mW (at 10 % harmonic
distortion)
Input
Microphone input jack (minijack)
sensitivity 0.3 mV for 3 kilo-ohms
or lower impedance microphone
Output
i (headphones) jack (minijack) for
8-300 ohms headphones
Variable range of the tape speed
From approx. +30% to –15% (with
REC TIME switch at “NORMAL”)
Power requirements
3 V DC batteries R6 (AA) × 2/
External DC 3 V power sources
Dimensions (w/h/d) (incl. projecting
parts and controls)
Approx. 91 × 112 × 39.2 mm
(3
5
/
8
× 4
1
/
2
× 1
9
/
16
in.)
Mass
Approx. 170 g (6.0 oz.)
Supplied accessories
Headphones (1)
Stereo microphones (1)
Design and specifications are subject
to change without notice.
Battery life (Approx. hours) (EIAJ*)
Sony Sony
alkaline R6P
LR6 (SG) (SR)
Playback 92
Recording 12 3
* Measured value by the standard of
EIAJ (Electronic Industries
Association of Japan). (Using a Sony
HF series cassette tape)
Note
The battery life may shorten
depending on the operation of the
unit.
Ver 1.0 2000. 03

– 2 –
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 3
2. GENERAL ................................................................... 4
3. DISASSEMBLY ......................................................... 5
4. MECHANICAL ADJUSTMENTS....................... 8
5. ELECTRICAL ADJUSTMENTS......................... 9
6. DIAGRAMS
6-1. Block Diagram ................................................................ 11
6-2. Printed Wiring Boards..................................................... 13
6-3. Schematic Diagram ......................................................... 15
7. EXPLODED VIEWS................................................ 18
8. ELECTRICAL PARTS LIST ............................... 21
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

– 3 –
SECTION 1
SERVICING NOTES
THE OPERATION CHECK AND THE VOLTAGE CHECK
WHENTHE MAIN BOARD REMOVED
This set detects which button of [REC], [PLAY], [FF], or [REW]
was pressed using the POWER switch (S303).
However, this button operation cannot be detected if the MAIN
board is removed because the POWER switch (S303) is mounted
on the MAIN board.
Therefore, if the operation check and the voltage check are per-
formed with the MAIN board removed,the POWER switch (S303)
must be fixed to ON state.
on
S303
– MAIN BOARD (Conductor Side) –
TAP201
TAP101
TAP202
TAP102
TAP201
TAP101
TAP202
TAP102
IC302
–MAIN BOARD (Conductor Side) –
CHANGETHE SPECIFICATION (US Model Only)
For the mounted MAIN board (A-3021-325-A), the TAP101 and
201 patterns are opened.
This specification is for the Canadian,AEP, E, and Chinese mod-
els.
Accordingly for the US model, short the TAP101 and 201 with a
solder to change the specification.

– 4 –
SECTION 2
GENERAL This section is extracted from
instruction manual.
B
AA
DC IN 3V
AC power adaptor
Adaptador de alimentación
de CA
Transformador de corrente
CA
REC TIME
MIC
zREC
xSTOP
mREW/
REVIEW
PAUSE .
A
BATT
i
Built-in microphone
Micrófono incorporado
Microfone incorporado
Side A
Cara A
Tab for side A
Lengüeta de la cara A
Patilha do lado A
E
C
D
Capstan
Cabrestante
Cabrestante
Erase head
Cabezal de borrado
Cabeça de eliminaçao
Pinch-roller
Rodillo de
apriete
Roletes
Cotton swab
Bastoncillo de
algodón
Cotonete
Record/playback head
Cabezal de grabación/
reproducción
Cabeça de gravação
MIC (PLUG IN POWER)
VOL
Lever
Palanca
Alavanca
NPLAY
xSTOP
mREW/REVIEW
PAUSE .
SPEED CONTROL
MFF/CUE

– 5 –
CABINET (REAR), “LID BLOCK ASSY, CASSETTE”
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
SET CABINET (REAR),
“LID BLOCK ASSY, CASSETTE”
MAIN BOARD,
MECHANISM DECK (MT-30D-118) BELT
8lid block assy, cassette
INSTALLATION “SPRING, CASSETTE”
cabinet (front)
5strap, hand
3claw
3four claws
2screw
(IB lock)
4cabinet (rear)
1three screws
(B1.7 ×10)
7boss
7boss
6Remove five solders.
lid, cassette
spring, cassette
spring, cassette

– 6 –
MAIN BOARD, MECHANISM DECK (MT-30D-118)
BELT
6claw
2screw
(1.7)
3screw
(M1.4)
4MAIN board
7mechanism deck
(MT-30D-118)
5three screws
(IB lock)
1Remove two solders of
electret condenser microphone
(MIC901).
1Remove four solders of
magnetic head (HRP901).
1Remove two solders of
motor (M901).
Cabinet (front)
1belt (capstan)
2belt (FR)
capstan belt
FR belt pulley (FR) assy
flywheel assy
motor, DC

– 7 –
INSTALLATION MAIN BOARD
NOTE: On installation MAIN board, adjust to the
S301 and the S303.
screw
(1.7) screw
(M1.4)
MAIN board
S301 (REC/PB)
S303
(POWER)
lever (REC)

– 8 –
Mode Torque Meter Meter Reading
4.90 mN•m
FWD CQ-403C (more than 50 g)
(more than 1.76 oz)
Mode Torque Meter Meter Reading
FWD 2.16 - 4.7 mN•m
(22 - 48 g•cm)
CQ-102C (0.31 - 0.67 oz•inch)
FWD 0.05 - 0.29 mN•m
(0.5 - 3 g•cm)
Back Tension (0.007 - 0.04 oz•inch)
FF 4.90 mN•m
CQ-201B (more than 50 g•cm)
REW (more than 0.69 oz•inch)
SECTION 4
MECHANICAL ADJUSTMENTS
TapeTension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belt
capstan idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (2.5 V) unless otherwise noted.
Torque Measurement

– 9 –
SECTION 5
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Setting:
Procedure:
– Normal –
1. Set the [REC TIME] switch (S601) to [NORMAL] position.
2. Playback WS-48A (tape center) in the FWD state.
3. Adjust RV601 so that the frequency counter reading becomes
3,000 Hz.
Specified Value: 2,970 to 3,030 Hz
4. Check that deflection of the frequency counter reading between
the beginning and the end of tape is within 1.5% (approx. 45
Hz).
– Double (1/2 SPEED) –
1. Set the [REC TIME] switch (S601) to [DOUBLE] position.
2. Playback WS-48A (tape center) in the FWD state.
3. Adjust RV602 so that the frequency counter reading becomes
1,500 Hz.
Specified Value: 1,485 to 1,515 Hz
Adjustment Location:
PRECAUTION
1. Specified voltage : 2.5 V (DC)
2. Setting
SPEED CONTROL dial : center click
0 dB=0.775 V
TestTape
Record/Playback Head Azimuth Adjustment
Setting:
Mode: playback (normal speed)
Procedure:
1. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note: Several peaks may appear, but take the maximum.
2. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location:
Type Signal Used for
P-4-A063 6.3 kHz, –10 dB Head Azimuth Adjustment
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
level mete
r
test tape
P-4-A063
(6.3 kHz, –10 dB) US: 32 Ω
Except US: 16 Ω
set
ijack (J301)
+
–
adjustment screw
Press the N
button.
frequency counter
test tape
WS-48A
(3 kHz, 0 dB)
set
i
j
ack
(
J301
)
–
+
US: 32 Ω
Except US: 16 Ω
RV602
Tape Speed Adjustment
(Double)
J301
RV601
Tape Speed Adjustment
(Normal)
J302
– MAIN BOARD (Conductor Side) –

TCS-30D
– 11 – – 12 –
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM
• SIGNAL PATH
: PB
: REC
: MIC
R-CH: Same as L-CH.
L-CH
R-CH R-CH
HE901
(ERASE)
HRP901
(REC/PB)
PB PREAMP, MIC AMP, REC AMP
IC301
38 16
5
10
PB IN
A
MIC
A
REF
10
REC DRV
OUT A 9
REC DRV
IN A
LINE
OUT A
PB PREAMP
REF
MIC
AGC
ATT
LINE
AMP
AGC
DET
REC
AMP
REC/PB
SWITCH
HEADPHONES
AMP
1
S301-4
(REC/PB)
REC
PB
S301-2
(REC/PB)
REC
PB
REC BIAS
SWITCH
Q102
B+
R-CH
2GCA
MIC
AMP
R-CH
MIC901
MIC
PULG IN POWER
J302
PB/REC
SW
+
DISCHARGE
SWITCH
Q301
VOL
MUTING
RV301
IN A
OUT
A
IN A
IN B
MUTE
HEADPHONES AMP
IC302 (1/2) R-CH
+
INV
OUT
INVERTER
AMP
OUT
B
OUT
ASP901
(SPEAKER)
6
1
8
11
3
RIPPLE
FILTER
POWER
AMP
POWER
AMP
SPEAKER AMP,
RIPPLE FILTER
IC303
REF IN REF CNTL
STANDBY
J301
i
BATT B+ DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
2PCS. 3V
CN301
DC IN 3V
–+
S303
(POWER)
17
RIPPLE FILTER
Q308
MIC B+
STANDBY
SWITCH
Q304 S301-3
(REC/PB)
REC
PB
B+
PULG IN/OUT
MUTE SWITCH
Q307-1
SPEAKER AMP
SWITCHING
Q306
Q307-2
PAUSE
S302
BATT
D401
ON
OFF
+
MUTE PULSE
GENERATOR
(PAUSE ON)
Q309
+
MUTE PULSE
GENERATOR
(PAUSE OFF)
Q310
MUTING SWITCH
Q302, 303
D301
11 13
VR
BASE
PW
RIPPLE FILTER
IC302 (2/2)
RIPPLE
FILTER
POWER
ON/OFF
12
RIPPLE FILTER
Q305
13
13
+
MOTOR B+
CAPSTAN/REEL
MOTOR DRIVE
IC601
34 VOUT V+
VCONT
8
VSENS
MOTOR
DRIVER
TAPE SPEED
(DOUBLE)
RV602
THP601
S301-1
(REC/PB)
REC
PB
REC TIME
S601
NORMAL
DOUBLE
TH602
TAPE SPEED
(NORMAL)
RV601
SPEED
CONTROL
RV603
MM
M901
(CAPSTAN/REEL)
15
6