Printed Wiring Board -Led Board; Ic Block Diagrams - Sony TCM-400DV Service Manual

TCM-400DV
Q Q
3 7 6 3 1 5 1 5 0
5-4. PRINTED WIRING BOARD - LED BOARD -
• See page 12 for Circuit Boards Location.
2
1
MAIN BOARD
A
LED BOARD
S901
V·O·R
1
H
R
L
R
B
MIC901
OFF
FLAT
MIC
T E
L 1 3 9 4 2 2 9 6 5 1 3
C
REC BATT
w w w
3
CN901
A
RV603
22
SPEED CONTROL
REC TIME
DOUBLE
NORMAL
11
1-682-640-
(11)
E
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: Parts on the pattern face side seen
(Side B) from the pattern face are indicated.
Pattern face side: Parts on the parts face side seen
(Side A) from the parts face are indicated.
x a o
. i
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Note on schematic diagrams
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1 / W or less unless otherwise
4
4
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

5-5. IC BLOCK DIAGRAMS

IC301 MM1251BFBE
SP901
SPEAKER 8 7 6
–
+
S902
+
Q Q
3 7 –
R
1 2
IC601 LB1979VS-TLM
20
CURRENT DETECT
WAVEFORM
CURRENT/MOTIVE
1
u 1 6 3
y
10 10
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2 4
8 9 9
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
E
: PB
a
: REC
IC501 NJM2072M (TE2)
5
INPUT
1
GAIN CONT
2
AMP OUT 3
BOOSTER
GND
CIRCUIT 4
6 3 1 5 1 5 0 8 9
3 4
19 18 15
17 16 14 13
POWER SUPPLY
+
– BIAS
SPEED
REFERENCE
DETECT
REFERENCE VOLTAGE
FOR SPEED CONTROL
OUTPUT
DETECT
PRE
MOTIVE POWER
DRIVER
DETECT
LOGIC
SOFT
MIX
SW
5 8
2 3 4 6 7
m
c o
.
2
8 9 9
VCC
8
OUTPUT2
7
6 OUTPUT1
RECOVERY
5
2 4 9 8 2 9 9
TIME CAP
12 11
OSCILLATOR
CIRCUIT
VOLTAGE
9 10