Sony TCM-900DV Service Manual ▷ View online
TCM-900DV
8
z
Waveforms
2
4
5
IC301 ql
IC401 ej
IC901 2
PB mode
VOLT/DIV : 1 V AC
TIME/DIV : 0.2
TIME/DIV : 0.2
µsec
PB (DPC AUTO) mode
VOLT/DIV : 1 V AC
TIME/DIV : 1
TIME/DIV : 1
µsec
REC/PB mode
VOLT/DIV : 1 V AC
TIME/DIV : 10
TIME/DIV : 10
µsec
– MAIN SECTION (1/3) –
– MAIN SECTION (3/3) –
– SW SECTION –
– MAIN SECTION (2/3) –
3.6 Vp-p
0.25
µsec
3.8 Vp-p
1.30
µsec
25
µsec
3.6 Vp-p
Note on Schematic Diagram: MAIN SECTION
• All capacitors are in
µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
• C : panel designation.
Note:
Note:
The components identi-
Les composants identifiés
fied by mark 0 or dotted par une marque 0 sont cri-
line with mark 0 are cri- tiques pour la sécurité.
tical for safety.
line with mark 0 are cri- tiques pour la sécurité.
tical for safety.
Ne les remplacer que par
Replace only with part
une piéce portant le
number specified.
numéro spécifié.
•
: B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PLAY (DPC OFF)
(
no mark : PLAY (DPC OFF)
(
)
: REC
<
>
: PLAY (DPC AUTO)
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
E
: PB
a
: REC
3.8 Vp-p
0.25
µsec
3
IC701 wh
REC/PB mode
VOLT/DIV : 1 V AC
TIME/DIV : 0.2
TIME/DIV : 0.2
µsec
SECTION 4
DIAGRAMS
1
T101
REC mode
VOLT/DIV : 5 V AC
TIME/DIV : 5
TIME/DIV : 5
µsec
30 Vp-p
20.0
µsec
9
9
TCM-900DV
4-1. BLOCK DIAGRAMS – MAIN SECTION (1/2) –
MIC901
S901
J101
RV401
T101
X401
Q111
Q101
RV601
RV602
RV603
RV604
M601
RV901
DPC
768kHz
MOTOR
FLAT MIC
MIC SENS
L
H
SPEED CONTROL
L
R
R
FWD
REV
RECORD/
FWD
REV
PB
REC
FWD
REV
FWD
REV
PB
REC
PB
REC
-
+
PRE +IN
PRE
AMP
RIPPLE
FILTER
FILTER
PRE OUT
PRE IN
RF OUT
RF IN
PB
REC
MIN
LPF20
LPF21
A IN
BUF OUT
BUF IN
A OUT
OSC1I
FIN
CP OUT
CP IN
CP REF
CP REF
XTLO
XTLI
RESETN
LPF1I
LPF1O
MOD0
MOD1
MOD2
MOD3
FXIN
OSC1O
OSC2I
OSC2O
SPEED CTL
PIC M
C1
PIC CTL
MOTOR CTL
PIC RST
OUT
VSP
IN+
S/S
COM
OSC
UOUT
VOUT
WOUT
VOUT
WOUT
L
HRPE901
HEAD
ERASE
PLAYBACK/
S102-2
S101-4
S102-1
S101-3
MIC
(PLUG IN POWER)
MIC
POWER
Q107
ATT
Q104
S101-2
BIAS
SWITCH
Q106
+1.8V
REG
S101-1
DIGITAL
PITCH CONTROL
D/A
A/D
LPF
LPF
DATA RAM
DSP
KEY SHIFT
CONTROL
TIMING
OSC
MICOM IF
MODE
REGISTOR
AUT
MODE
REGISTOR
COMP
Q405
Q403
Q404
SYSTEM
CONTROL
DETECT
SPEED
CURRENT
DETECT
DRIVE
PRE
OUTPUT
BIAS/
OSC
WAVEFORM
DETECT
SOFT
SWITCH
CONTROL
SERVO
+B
(BATT)
SPEED CONTROL
SPEED CONTROL
SPEED CONTROL
SPEED CONTROL
POWER
(+3.6V)
PRE AMP
REC
PIC
PIC
OSC
BIAS
Q105
+B
Q401
PB/REC
SWITCH
SWITCH
(PWR)
+B
(PWR)
SWITCH
Q112
GAIN
GAIN
MOTOR
BRAKE
BRAKE
SWITCH
INITIAL
Q603,608
Q601
MOTOR
BRAKE
BRAKE
Q602
Q109
Q607
Q606
Q604
Q402
TAPE
SPEED
TAPE
SPEED
TAPE
SPEED
TAPE
SPEED
9.6cm/s
4.8cm/s
2.4cm/s
1.6cm/s
POWER
(+3.6V)
+1.8V REG
COM
U
V
W
V
W
• Signal path.
E
: PB
a
: REC
TCM-900DV
10
10
4-2. BLOCK DIAGRAMS – MAIN SECTION (2/2) –
S902
S903
S904
J102
S701
J801
S801
Q306
Q113
Q114
Q115
Q103
Q202
D803
PH701
X301
X701
S702
Q301
L801
D901
SP901
(F/R GEAR)
POWER
REEL ROTATE
DET
4MHz
4MHz
(FF/REW)
(SPEAKER)
DPC
AUTO
MANUAL
OFF
REC TIME
NORMAL
DOUBLE
OFF
ON
REC
OSC2
SCK
SO
CS
CD
LCD
DRIVER
COM1-4
SEG1-18
DISPLAY
LIQUID
CRYSTAL
(3.6V)
B+
OSC1
LIN
AOUT
XT
XT
BUSY
SK
SO
SI
CS
STBY
INV
OUT
OUT
IN2
PWR
OUT2
OUT2
IN1
PWR
OUT1
+
+
REF.
+
-
-
+
POWER OUTA
POWER OUTB
POWER +INA
POWER -INA
POWER -INA
POWER +INB
POWER -INB
POWER
AMPA
POWER
AMPB
ALC
ALC IN
REP RST
REP CS
REP BUSY
REC CTL
REP ON
F/R GEAR
SW
VOR IN
DPC SW
JACK DET
PHOTO IN
TAPE SPEED SW
KEY IN
SP SW
W
AKE UP
VOR SW
LCD/REP DATA OUT
REP SI
LCD REP SCLK
LCD CS
PIC ON/OFF
X1
X2
RESET
REP QUE/REV
MUTE CTL
DRY BATTERY
SIZE "AA"
2PCS, 3V
(IEC DESIGNATION R6)
DC IN 3V
+
RESET
LCD901
VOL
-
-
11 14
15 32
IC REPEAT
A/D
TIMING
OSC
MUC I/F
RAM
ADPCM
ANALIZER
SYNTHESIZER
D/A
AMP
Q302-305
REPEAT,
QUE/REV BEEP OSC
MUTE
Q307
Q307
POWER
(+3.6V)
7
5
MUTE
ATT
Q102
Q110
AMP
3
1
POWER AMP
FILTER
RIPPLE
REF
VCC
FILTER
RIPPLE
+B(BATT)
Q201
PRE AMP,
POWER AMP
EAR
SYSTEM
CONTROL
POWER
(3.6V)
KEY MATRIX
S905-911
+3.6V REG
+3.6V REG
DC-DC
CONVERTOR
+B
(BATT)
+B
+B
+B
+3.6V
POWER
(+3.6V)
(PIC)
(PWR)
+B SWITCH
Q801-802
ATT
Q501
AMP
Q502
LED DRIVE
Q503
VOR
AMP
REC
PIC
PIC
RV301-1
RV301-2
Q702
Q701
RESET
Q108
POWER
(3.6V)
EVR
+B
(+3.6V)
D801
• Signal path.
E
: PB
a
: REC
11
11
TCM-900DV
1
S101
S102
CN101
C102
T101
C101
C128
R128
Q401
R125
C104
C108
C111
R118
R108
R102
C113 C126
C127
R117
R119
R116
R121
R122
R708
R123
D101
D102
R301
R303
C303
C304
C306
C307
C305
C308
X301
C310
R422
C301
C302
R420
R318
R304
R107
C116
C110
C118
C122
C124
C120
C115
R142
R111
C129
C121
R114
R305
R306
R307
R308
R309
R310
R311
R312
R313
R314
C311
C312
C313
C314
R133
R131
R132
C142
C145
C112
R134
R135
C138
R109
C132
C140
R137
R138
R139
R136
R106
C131
C109
RV301
C136
R141
C134
S701
R717
R714
R315
Q302
C141
R110
R115
C309
R144
C137
Q305
Q304
C143
C144
R103
C125
C427
R316
C139
C123
R710
R130
C103
R120
Q107
R127
Q303
R317
R126
C114
R104
J102
Q101
Q104
Q103
Q106
Q105
Q112
Q114
Q115
Q113
Q102
Q307
R101
J101
C105
Q402
Q306
Q301
Q111
C133
C130
R124
R143
R140
C135
R105
C107
Q108
Q110
R302
C117
R112
C119
R113
Q109
0.01
2200p
4700p
3.3k
HN1K02FU
47
47
4V
0.047
0.22
330
4.7k
2.2k
0.01
47
4V
47
4V
330
10k
22k
10k
470k
470k
100k
MA8056
MA8056
100k
220k
47p
1
6.3V
10
6.3V
10
6.3V
0.1
0.1
4MHz
10
6.3V
680k
0.1
0.1
100k
220k
680k
1k
3300p
1000p
10
6.3V
47
4V
47
4V
0.033
22
4V
2.2k
10k
1
10
6.3V
680k
470k
4.7k
4.7k
470k
470k
4.7k
4.7k
470k
1M
100
1000p
1000p
0.22
0.22
680k
100
100
0.1
1000p
0.22
330k
100
10
6.3V
15k
1
1
100k
100k
100k
100k
100k
1
0.22
50k
470p
22k
0.1
680k
680k
680k
XP4501
0.1
330k
47k
0.1
680k
1
2SK1830
2SK1830
1
6.3V
1
10k
0.1
1
680k
1
6.3V
1
100k
100k
2200p
3.3k
2SK1830
100
XP4501
100k
47
1
3.3k
2SD596
SWITCH
2SK1830
ATT
2SK1830
SWITCH
2SK2009
BIAS
SWITCH
2SD596
BIAS
OSC
2SK1830
GAIN
SWITCH
2SK1830
SWITCH
2SK1830
SWITCH
2SK1830
SWITCH
2SK1830
MUTE
2SK1830
MUTE
3.3k
0.1
UN9110
UN9110
SWITCH
SWITCH
2SK1830
SWITCH
2SK1830
SWITCH
1
0.1
220k
47k
22k
470p
1k
0.15
UN9110
2SK1830
ATT
470k
0.1
4.7
0.01
22
UN9217
1 2
3
4
5
6
7 8
9
10
11
12 13 14
15 16
17 18
19 20 21 22 23
24 25 26
27
28
29
29
-
+
+
-
-
+
POWER OUTA
POWER GND
POWER OUTB
TC
PRE +IN
SGND
POWER +INA
POWER -INA
POW
ER +INB
POWER -INB
POWER AMPA
POWER
PRE AMP
AMPB
RIPPLE
FILT
ER
ALC
GND
VCC
A OUT
A -
A +
B OUT
B -
B +
IC103
NJU7015R
L
R
R
FWD
REV
RECORD/
FWD
REV
XC62FP1802R
VSS
VOUT
VIN
IC102
AGND
SG
LIN
LOUT
AMON
AOUT
AIN
AVDD
DGND
TEST
TEST
TEST
RESE
T
XT
XT
DVDD
MGND
TEST
TEST
TEST
TEST
TEST
TEST
TEST
TEST
TEST
BUSY
SK
SO
SI
CS
MVDD
PB
REC
FWD
1
5
9
IC301
MS87V1021
IC101
NJM-2128M
PRE OUT
PRE IN
VCC
ALC IN
RF OUT
RF I
N
REV
L
HRPE
901
HEAD
PLAY
BACK
/
ERAS
E
VOL
IC REPEAT
AMP
PRE AMP,
POWER AMP,
AGC
+1.8V REG
AND
GATE
INVERTER
Q302-305
REPEAT,
QUE/REV BEEP OSC
MIC POWER
SWITCH
PB/ REC
INVERTER
-1
-2
-1
-2
-3
-3
-4
-3
-4
-1
-2
MIC
(PLUG IN POWER)
EAR
KEY IN
GND
GND
GND
GND
DIR
4-3. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) –
z
Refer to page 8 for Notes.
z
Refer to page 8 for Waveforms.
z
Refer to page 20 for IC Block Diagrams.
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