TCM-500DV
14
14
Note on schematic diagrams
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W 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
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
E
: PB
a
: REC
IC101 NJM2128M-TE2
6-7. IC BLOCK DIAGRAMS
IC103 LM4863MTX
IC401 MM125BFBE
+
–
+
–
7
8
1
9
ALCIN
PRE
AMP
+
–
POWER
AMP
POWER
AMP
PRE +N
2
SGND
3
POWER +INA
POWER -INB
POWER +INB
RFOUT
RFIN
4
POWER -INA
11 POWER OUTB
10 TC
12 POWER GND
15 PREOUT
16 PRE -IN
V+
13
POWER OUTA
14
5
6
RIPPLE
FILTER
ALC
7
8
1
9
GND
GND
SHUTDOWN
2
GND
3
+OUT (A)
-OUT (A)
-IN (A)
GND
+IN (A)
GND
GND
4
VDD
20k
20k
20k
20k
20k
50k
50k
VDD
11
BYPASS
10
+IN (B)
12
-IN (B)
VDD
VDD/Z
15
GND
16
HP-IN
-OUT (B)
+OUT (B)
14
19
18
17
20
20k
5
AMP 2A
+ –
AMP 1A
+ –
AMP 2B
+ –
AMP 1B
+ –
6
13
BOOSTER
CIRCUIT
NC
CT
GND
OUT
NC
VCC
VS
HYS
2
1
3
4
6
7
8
5
+
–
+
–
IC501 NJM2072M (TE2)
1
2
3
4
8
7
6
5
GND
AMP OUT
GAIN CONT
INPUT
VCC
OUTPUT2
OUTPUT1
RECOVERY
TIME CAP
IC601 LB1979VS-TLM
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
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
