Sony TCM-400DV User manual

SERVICE MANUAL
CASSETTE-CORDER
E Model
Chinese Model
Tourist Model
Model Name Using Similar Mechanism New
Tape Transport Mechanism Type MT-400-175
SPECIFICATIONS
TCM-400DV
Ver 1.0 2001.10
9-873-336-01
2001J0200-1
© 2001. 10
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
Recording system
2-track 1 channel monaural
Tape speed
4.8 cm/s or 2.4 cm/s
Frequency range
250 - 6 300 Hz using nomal (TYPE
I) cassette (with REC TIME switch
at “NORMAL”)
Speaker Approx. 3.6 cm (1 7/16 in.) dia.
Power output
250 mW (at 10 % harmonic
distortion)
Input Microphone input jack (minijack)
sensitivity 0.2 mV for 3 kΩor
lower impedance microphone
Output Earphone jack (minijack) for 8 -300
Ωearphone
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) x 2/
External DC 3 V power sources
Dimensions (w/h/d) (incl. projecting parts and controls)
Approx. 86.7 x 114.4 x 35.4 mm
(3 1/2x 4 5/8x 1 7/16 in.)
Mass Approx. 160 g (5.7 oz.) (main unit
only)
Design and specifications are subject to change without notice.
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TCM-400DV
2
TABLE OF CONTENTS
1. GENERAL ................................................................... 2
2. DISASSEMBLY ......................................................... 3
3. MECHANICAL ADJUSTMENTS....................... 5
4. ELECTRICAL ADJUSTMENTS......................... 6
5. DIAGRAMS
5-1. Block Diagrams...................................................... 7
5-2. Printed Wiring Board –MAIN Board – ................. 8
5-3. Schematic Diagram ................................................ 9
5-4. Printed Wiring Board –LED Board – .................... 10
5-5. IC BLOCK DIAGRAMS....................................... 10
6. EXPLODED VIEWS................................................ 11
7. ELECTRICAL PARTS LIST ............................... 15
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
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.
SECTION 1
GENERAL
This section is extracted from
instruction manual.
MIC
VOL TAPE COUNTER
EAR
VOR
REC TIME
REC
DC IN 3V
REW/
REVIEW
STOP
PAUSE
REC
Flatmic
SPEED CONTROL
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TCM-400DV
3
2-1.CABINET (REAR), CASSETTE HOLDER ASSY
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
Cassette holder ASSY
Spring (cassette)
7
Claw
2
Claws
2
Strap, hand
4
3
6
Claws
2
Screws (B1.7X9)
1
Screws (B1.7X9)
1
Cabinet (front)
Cabinet (rear)
Flexible board (CN901
)
5
Cassette holdr ASSY LED board
Belt (cap), belt (pulley), M901 (capstan/reel motor), HRP901 (REC/PB head),
HE901 (erase head)
Set Cabinet(rear) MAIN Board,Mechanism Deck
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TCM-400DV
4
2-3. MAIN BOARD, MECHANISM DECK
Cabinet (front)
Mechanism dec
k
Main board
4
6
Screws (M1.4)
3
Screws (IB lock)
5
Remove solder
(four places)
2
Remove solder
(two places)
Lever (pause)
Knob (pause)
Note: To install, position the Knob
(pause) and the lever (pause)
respectively.
1
2-2. LED BOARD
Cassette holder Assy
Screw(1.7)
3
LED board
Flexible board
5
Screws(1.7)
Freame
(cassette holder)
1
2
4
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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TCM-400DV
5
SECTION 3
MECHANICAL ADJUSTMENTS
Tape Tension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belt
capstan
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.
Mode Torque Meter Meter Reading
1.97 – 3.92mN•m
FWD (20 – 40 g•cm)
CQ-102C (0.28 – 0.55 oz•inch)
0.05 – 0.49 mN•m
Forward Back (0.5– 5 g•cm)
Tension (0.007 – 0.069 oz•inch)
FF, REW CQ-201B more than 4.91 mN•m
(more than 50 g•cm)
(more than 0.69 oz•inch)
Mode Tension Meter Meter Reading
FWD CQ-403A more than 50 g
(more than 1.76 oz)
2-4. BELT (CAP), BELT (PULLEY), M901 (CAPSTAN/REEL MOTOR),
HRP901 (REC/PB HEAD), HE901 (ERASE HEAD)
HRP901
(REC/PB head)
Attaching belt (CAP)
and belt (pulley)
z
Belt (CAP)
Belt (CAP)
Belt (pulley)
Belt (pulley)
Screws (M1.4)
3
M901
(Capstan/reel
motor)
4
1
8
7
Fly ASSY,
capstan
Washer
6
Washer
5
0
qs
9
2
Washer
(stopper N)
Screws
HE901
(Erase head)
qa
Screw
Torque Measurement
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TCM-400DV
6
SECTION 4
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Mode: playback
Procedure:
1. Set [REC˚TIME]switch (S902) to NORMAL (4.8 cm/s) posi-
tion, and playback the tape (WS-48A) .
2. Adjust RV601 so that frequency counter reading becomes 3,000
Hz.
Specification values: 2,990 to 3,010 Hz
3. Set [REC˚TIME]switch (S902) to DOUBLE (2.4 cm/s) posi-
tion.
4. Playback the tape from the beginning for two minutes, then
adjust RV602 so that frequency counter reading becomes 1,500
Hz.
Specification values: 1,495 to 1,505 Hz
Confirm that deflection of the frequency counter reading between
the beginning and the end of tape is within 2% (NORMAL: approx.
60 Hz, DOUBLE: approx. 30 Hz) .
Setting:
• Supplied voltage: 2.5 V
• Switch and control position
VOL contorl (RV101) : mechanical center
PAUSE switch (S601) : OFF
SPEED CONTROL (RV603): center click
VOR switch (S901) : OFF
TestTape
0 dB=0.775 V
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
frequency
counter
test tape
WS-48A
(3 kHz, 0 dB) 32 Ω
EAR jack (J101)
set +
–
RV602
Tape Speed Adjustment
(Double Speed)
RV601
Tape Speed Adjustment
(Normal Speed)
Adjustment Location:
– MAIN BOARD (Conductor Side) –
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TCM-400DV
77
5-1. BLOCK DIAGRAMS
SECTION 5
DIAGRAMS
S101 (1/6)
REC
R
PB
S101(3/6)
PB
r
REC
S101 (2/6)
REC
R
PB
Q501
RV101
wVOL
S101(5/6)
REC
R
PB S101(4/6)
PB
r
REC
B+ 3V
B+ 3V
6
7
4
VOLTAGE DET
IC301
MIC901
FLAT MIC
J102
MIC
(PLUGIN POWER)
15 14
11
1
16
4
7
PRE/POWER AMP
IC101
MIC POWER
Q101
PRE
DRIVE
OUTPUT
SOFT
SWITCH
WAVEFORM
DETECT
SPEED
DETECT
BIAS
OSC
CURRENT
DETECT
MOTOR
BRAKE
Q602
MOTOR
BRAKE
Q603
INITIAL
SWITCH
Q604,605
LED
DRIVE
Q305
LED
ON/OFF
Q304
B+
SWITCH
Q302
BATT LED
DRIVE
Q303
REC LED
ON/OFF
Q301
ATT
ALC
ATT
LIPPLE FILTER
REC B+
SWITCH
Q102
MUTE
Q103
MUTE DRIVE
Q104
3
6
6
5
J101
EAR
SP901
SPEAKER
HRP901
RECORD/PLAYBACK
HEAD
HE901
ERASE HEAD
S902 (2/2)
REC TIME
DOUBLE
R
NORMAL
5
6
1
VOR CONTROL
IC501 4
11
13
14
16 17
12
5
6
SERVO
CONTROL
IC601
D501
S901
V·O·R
H
R
L
R
OFF
15 IN+
VREF
UOUT
VOUT
WOUT
S/S
VSP
OSC
COM
OUT
M
M901
CAPSTAN/REEL
MOTOR
BATT B+
U
V
W
Q601
INVERTER
S101(6/6)
REC
R
PB
S902 (1/2)
REC TIME
DOUBLE
R
NORMAL
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
DC IN 3V
!
J103
S102
POWER
S601
PAUSE.
OFF
r
PAUSE
REC
BATT
E
D902
D901
D903
REC B+
RV603
SPEED CONTROL
RV602
TAPE SPEED 2.4cm
RV601
TAPE SPEED 4.8cm
REC B+
• Signal path.
E: PB
a: REC
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TCM-400DV
88
D101 B-8
D501 D-7
IC101 C-7
IC301 F-6
IC501 E-7
IC601 F-8
Q101 C-8
Q102 D-8
Q103 C-8
Q104 D-8
Q301 E-7
Q302 F-6
Q303 F-7
Q304 F-7
Q305 E-6
Q501 D-7
Q601 F-8
Q602 F-7
Q603 F-7
Q604 F-8
Q605 F-7
5-2. PRINTEDWIRING BOARD –MAIN BOARD –
Ref.No. Location
• Semiconductor
Location
Note:
•X: parts extracted from the component side.
•a: Through hole.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthe pattern facesideseen
(Side B) fromthepattern face are indicated.
Pattern face side: Parts on the parts face side seen
(Side A) from the parts face are indicated.
MAIN BOARD (SIDE B) MAIN BOARD
(SIDE A)
11
(11)
1-682-639-
11
(11)
1-682-639-
DC IN 3V
!
M
BCE
BCE
BCE
ECB ECB
ECB
BCE
BCE
BCE
BCE
BCE
BCE
BCE
BCE
ECB
IC101
IC501
IC301
L301
IC601
R316
R315
R314
R313
R311
R312
R302
R151
R152
R122
R121
R607
C503 C504
C502
C302
C303
S102
C506 C127
C101
C102
C122
C121
C103
C104
C130
R301
R101
C131
C505
C301
C126
C501
C133
Q102
Q602
Q603
Q605
Q604
Q301
Q101
Q501
D501
R153
Q302
Q601
Q305
C305
R308
Q303
Q304
R603
R604
R605
C605
C606
RED
BLK
ORG
WHT
C607
C608
R602
C601
C602
C604
R621
R622
C610
R601
R623
R606
R614
R611
C109
C110
C112
R113
R116
C132
C123
R128
R129
R102
R103
R104
R105
R106
R107
R108
C105
C106
C108
C129
R110
R124
R125
R126
R127
R123
C124
C125
R130
R501
R502
R503
R504
R505
R507
R506
R303
R304
R305
R306
R307
R309
RV601 RV602
R115
R615
C609
C107
C113
Q103
C136
C128
Q104
R612
1
5
10 11
15
20
1
8
1
8
5
1
4
5
10
15
22
9
16
R120
R109
R119
D101
R131
R132
C135
THP60
C154
C155
C114
TP28
C611
C153
C134
C304
J101
J102
HRP901
RECORD/PLAYBACK
HEAD
HE901
ERASE HEAD
S101
REC T PB
S601
PAUSE.
OFF
r
PAUSE
-1
-2
-3
-6
-5
-4
S102
POWER
A
LED
BOARD
CN902
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
J103
M901
CAPSTAN/REEL
MOTOR
EAR
MIC
(PLUGIN POWER)
RV101
wVOL
CN901
23 4 5 6 7 89
A
1
B
C
D
E
F
G
H
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TCM-400DV
99
5-3. SCHEMATIC DIAGRAM
• See page 10 for Notes.
• See page 10 for IC Block Diagrams.
D901
D902
D903
S902(1/2)
S902(2/2)
S101(6/6)
C101 C103
C102
R102
R101
C104
R103
R104
R105
C105
C106
C114
R106
R107
R108
C107
R109
R119
Q101
R110
R120 C108
C109
S101(1/6) S101(2/6)
R501
IC501
R502
C501 R504 R505
R503
C502
C503
C504
C505
R506
C506
R303
R305
R304
Q302
Q304
C301
R301
C302 R306
R307
R309
C303
R311
Q305
R312
C304
C305
R315
R314
R601
C601
C602 C604
R604
R603
R602
C605
C606
C609
R606
R605
C608
R615
RV602
THP601
R612
R611
C610
R607
Q603
Q602
Q605
R622
R621
Q604
C611
R623
R131
R132 C135
S101(3/6)
R128 R129 C129 C130
Q103
C136
C132 C133 C134 R130
S101(4/6)
S601
S101(5/6)
R153
R152
J101
R151
J103
S102
C154
C155
C153
C127
C126
C125
R126
R125
C128
R124
C124
R123
R122
C123
C122
C121
R121
C110
R115
C112
R116
R113
D101
CN901
CN902
R127
IC601
C607
R614
CN101
IC101
RV101
R308
R313
L301
100uH
Q303
IC301
RV601
Q601
Q102
S901
V O R
..
R302
C113
C131
J102
Q104
D501
SP901
Q301
Q501
RV603
R316
MIC901
SML-210LT
SML-210LT
SML-211YT
0.1 0.22
0.047
47k
4.7k
1000p
1k
2.2k
2.2k
4.7
10V
4.7
10V
1000p
2.2k
4.7k
4.7k
2.2
10k
22k
2SC4213
3.3k
3.3k 10
6.3V
1
4.7k
NJM2072M
1k
10
10V 1k 100k
68
0.1
0.1
1000p
22
4V
4.7k
0.22
330
1.5k
22k
UN5114
UN5214
22
4V
1.5k
0.01 15k
68k
470
1
470
UN5214
22k
10
6.3V
0.1
150k
220k
2.2k
0.047
0.047 10
10V
1M
1M
1M
0.047
0.047
2.2
100k
10k
0.047
470
2.2k
3.3K
6.8k
1k
0.47
1k
2SA1745
2SA1745
UN5114
100
100
UN5214
10
6.3V
10k
10k
4.7k 10
10V
10k 4.7k 1000p 1000p
2SC4213
0.01
0.01
47
6.3V
47
6.3V 47k
68
22
22
1000p
1000p
220
4V
1
10
10V
0.01
2.2
2.2k
10
10V
4.7
0.1
2.2k
680
0.22
0.47
0.47
220
4700p
33k
0.01
6.8k
10k
MA111-TX
22P
22P
2.2M
LB1979V
0.22
33k
NJM2775A-TE2
10k
330
68
UN5117
MM1251M
4.7k
UN5214
UN5114
22
2.2
6.3V 10
10V
UN5114
MA111-TX
2SD1819A
UN5215
10k
10k
EAR
AMP
1
2
3
4
VCC
U
V
W
HRP901
HE901
OFF
(A)
(D)
(F)
(E)
(C)
(B)
REC
BATT
DC IN 3V
(POWER)
PRE/POWER
VOL
DOUBLE
NORMAL
DOUBLE
NORMAL
S902
L
H
FLAT MIC
PB REC
PB REC
PB REC
PB REC
PB REC PB REC
DRY BATTERY
SIZE"AA"
2PCS,3V
(IEC DESIGNATION R6)
MIC AMP
MIC
(PLUG IN POWER)
ON/OFF
REC LED
ON/OFF
LED
DRIVE
LED
DRIVE
BATT LED
+B
SWITCH
VOR CONTROL
VOLTAGE
DET
MOTOR
DRIVE
TAPE SPEED
2.4cm
TAPE SPEED
4.8cm
INVERTER
MOTOR
BRAKE
SWITCH
Q602,603
Q604,605
INITIAL
MOTOR
M901
CAPSTAN/REEL
PAUSE
OFF PAUSE
SWITCH
REC B+
MUTE
DRIVE
HEAD
RECORD/
PLAYBACK
HEAD
ERASE
CONTROL
SPEED
REC
TIME
SPEAKER
PAUSE
MUTE
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4 2
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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TCM-400DV
10 10
5-4. PRINTEDWIRING BOARD - LED BOARD -
• See page 12 for Circuit Boards Location.
LED BOARD
11
(11)
1-682-640-
MIC901
FLAT
MIC
S901
V·O·R RV603
SPEED CONTROL
S902
REC TIME
SP901
SPEAKER
H
R
L
R
OFF
DOUBLE
R
NORMAL
REC BATT E
CN902
D902
D901
D903
A
MAIN BOARD
CN901
122
23 4
A
1
B
C
IC301 MM1251BFBE
5-5. IC BLOCK DIAGRAMS
IC501 NJM2072M (TE2)
IC601 LB1979VS-TLM
235
4678910
1
11
12
13
14
15
16
17
181920
SOFT
SW MIX
CURRENT/MOTIVE
LOGIC
WAVEFORM
DETECT
PRE
DRIVER
OUTPUT
CURRENT DETECT
SPEED
DETECT
REFERENCE VOLTAGE
FOR SPEED CONTROL
POWER SUPPLY
BIAS
REFERENCE
VOLTAGE
OSCILLATOR
CIRCUIT
MOTIVE POWER
DETECT
+
–
FC GND FC RI OUT VSP IN+ VREF S/S COM OSC
WB
VCC
NC
U OUT
V OUT
W OUT
P-GND
VB
UB
GND
BOOSTER
CIRCUIT
NC
CT
GND
OUT
NC VCC VS HYS
21 3 4
678 5
+
–
+
–
1
2
3
4
8
7
6
5
GND
AMP OUT
GAIN CONT
INPUT VCC
OUTPUT2
OUTPUT1
RECOVERY
TIME CAP
Note on schematic diagrams
• All capacitors are in µF unless otherwisenoted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
• A: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply frombattery terminal .
• Voltages are dc with respect to ground under no-signal
conditions.
no mark :PLAY
( ) : REC
• Voltagesaretakenwith a VOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
Note:
•X: parts extracted from the component side.
•a: Through hole.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthe pattern facesideseen
(Side B) fromthepattern face are indicated.
Pattern face side: Parts on the parts face side seen
(Side A) from the parts face are indicated.
• Signal path.
E: PB
a: REC
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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