Panasonic RQ-SX46 User Manual
PLAYBACK
NDIP
NDIP
NDIP
HEAD
TP98
TP6,7
( TP8,12
)
PRE
AMP
POWER
AMP
VR2
(VOLUME)
JK1
HEADPHONE
IC2
IC5
DC-DC
CONV
+B
+B
IC4
RESET
IC3
SYSTEM
CONTROL
BATT.
Notes
( ):Indicates pin No. Right channel.
TP98
MOTOR
:Playback signal line.
M
MOTOR
DRIVE
Break
Control
Q2,Q3,Q4
IC1
TP42
TP44
Q8
MOTOR START
DRIVE
VR1
(TAPE SPEED ADJ.)
RQ-SX56EG Block Diageram
Q10,11
Z1
TAPE
END
DET.
TAPE
MODE
Q12,13
Z2
A
NDIP
NDIP
NDIP
SCHEMATIC DIAGRAM-1
+ B Voltage Line
Playback Signal
HEAD CIRCUIT
B
Lch
PLAYBACK
HEAD
Rch
REV
FWD
FWD
REV
MOTOR
1
8
4
5
6
3
7
2
1
5
3
4
2
6
M
TP7
FWC1
1
5
3
4
2
6
1
VCC
2
3
4
W
5
U
6
V
7
TP1
C7
680P
C8
680P
TP8
MM1279XVBE
MOTOR
TP3
TP2
C38
IC1
0.1
TP6
C12
680P
TP4
PRE
DRIVER
START UP
CONTROL
C35
0.01
C37
0.01
GND
0
VccDRFC
SOFT
SW
START UP
LOGIC
START UP
DECILLATOR
OSC
0.1
C39
C40
0.47
C3
680P
TP18
C36
0.01
20 19 18 17 16 15 14 13 12 11
DRIVE
VPVPWUWPUGND
1 2
1.4V 0.7V 1.4V 0.2V 0V 0.5V 1V 0.3V 0.3V
A
E
C
D
B
R26
REFARENCEFWR/REV
10K
C41
0.22
TC1
VREF
1.5V
CURRENT
CONTROL
SPEED
CONTROL
TC2
START
C42
OUTPUT
BIAS
CONTROL
ERROR
VDDRIIN+
0.1
R28
100
AMP
0V1.4V 0V1.4V0.6V1.5V0.7V1.4V0.7V
OUT
109876543
TP9
Q2,3,4
B1ADMB000003
BREAK CONTROL
W
Q2
1.5V
3.4V
U
Q3
1.5V
1.5V
3.4V
270
R30
BREAK CONTROL
Q5
UN5216RTX
R31
3.8V
0
1.5V
270
4.7K
V
1.5V
Q4
R32
0
3.4V
270
2.3V
1.5V
4.7K
4.7K
2.3V
Q6
UN511LTX
BREAK CONTROL
Tape Speed
Adjustment.
D2
MA2SD1000L
R27
15K
VR1
10K
RRN3A08B14WA
R29
12K
C43
TP5
4V3.3
R61
8.2K
x
y
TP10
R25
8.2K
z
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