11
11
M-740V
5-1. BLOCK DIAGRAM
J101
MIC
MIC901
MIC
(PLUG IN POWER)
MIC
ALC CONTROL
Q101
HRPE901
REC/PB/ERASE
HEAD
REC/PB
SWITCH
Q102
VOR
SWITCH
Q104
VOICE MIRROR
SWITCH
Q106
VOICE MIRROR
DRIVE
Q107
NF CONTROL
Q103, 116
DIR
SWITCH
Q117
PB
REC
S101 (2/4)
(REC/PB)
PB
REC
S101 (1/4)
(REC/PB)
(REC/PB)
(ERASE)
HRPE902
REC/PB/ERASE
HEAD
(REC/PB)
(ERASE)
1.2cm
2.4cm
S602 (2/2)
TAPE SPEED
26
15
21
27
5
4
1
29
28
2
REC/PB AMP
IC101 (1/2)
+
-
+
-
+
-
+
-
MIC IN
MIC
EQ
PRE NF
ALC CONT
REC OUT
VREF OUT
VREF
EQ IN
MIC VCC
MUTE
R.F
VCC
3
REC IN
PRE OUT
VOX
VOX DELAY
B+
(3V)
ALC
MIC
VCC
S101 (3/4)
(REC/PB)
PB
REC
PB REC
OFF
L
H
S102
VOR
RV101
VOL
24
11
14
PWR IN
PWR OUT2
12
16
1
13
11 14
15
19
2
20
22
PWR OUT1
GVM OUT
GVN VREF
GVN CONT
POWER AMP
IC101 (2/2)
LED DRIVE
23
P/R SW
P/R
PAUSE
M
B+
(+3V)
M901
MOTOR
S101 (4/4)
(REC/PB)
J102
EAR
+
SP901
SPEAKER
LED UNIT
B+
B+
DRY BATTERY
SIZE "AA"
(IED DESIGNATION R6)
2PCS, 3V
DC IN 3V
CN101
S103
(POWER)
S604
(DIR)
Signal path
: PB
: REC
REC
MUTE
Q120
MUTE
SWITCH
Q119
Q108
VREF
MUTE
SWITCH
Q112
PAUSE
SWITCH
Q118
MUTE
GEN
Q111
S603
PAUSE
OFF
ON
UOUT
VOUT
IN+
S/S
VSP
OUT
DR
12
VREF
WOUT
2.4cm
1.2cm
S602 (1/2)
TAPE SPEED
RV601
TAPE
SPEED
1.2cm
RV602
TAPE
SPEED
2.4cm
SPEED
1
2
POWER AMP
POWER AMP
VOX
7
DRIVER
STARTUP
DIR LOGIC
WAVEFORM
DET
LOCKING
PROTECT
STARTUP
DET
CURRENT
DET
SPEED
DET
REF V
OSC
BIAS
REC/BATT
INVERTER
Q603
+
-
+
MOTOR SERVO
IC601
20
19