WM-EX651
12
12
WM-EX651
For schematic diagrams.
Note:
• All capacitors are in
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
•
%
: indicates tolerance.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
no mark : PLAY
• Voltages and waveforms are dc with respect to ground in
playback mode.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
Caution:
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
For printed wiring boards.
Note:
•
X
: parts extracted from the component side.
•
x
: parts extracted from the conductor side.
•
®
: Through hole.
•
: Pattern from the side which enables seeing.
6-1. IC BLOCK DIAGRAMS
IC301 TA2123AF (EL)
PRE A
PRE B
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
PW OUT-R
PW OUT-C
PW OUT-L
VCC
RF OUT
REF OUT
BST NF
BST OUT
PW IN C
LPF
EQ-L
PW NF-L
PW IN-L
PW IN-R
PW NF-R
3
REV IN-L
5
PRE NF-L
6
PRE OUT-L
7
MTL DRV-L
8
MTL DRV-R
9
PRE OUT-R
10
PRE NF-R
11
AMS IN
12
REV IN-R
4
FWD IN-R
2
FWD IN-L
1
21
20
19
18
17
GND
16
AMS DET
15
AMS MIX
14
AMS SW
13
22
23
24
38
CAMP SW 37
PW SW 42
MT SW 41
F/R SW 44
BST SW
43
M/N SW 46
PRE GND 47
VREF IN 48
PRE SW 45
AMS OUT 40
BEEP 39
26
27
28
29
30
31
32
33
34
AGC DET
36
AGC IN
35
+
–
+
–
+
–
+
–
+
–
+
–
EQ-R
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH
COMPARATOR
MTL DRV
IC601 MM1279XVBE
V
1
PW
2
W
3
GND
4
OSC
5
DR
6
VREF
7
START
8
VSP
9
IN+ 10
PV
20
U
19
PU
18
GND
17
VCC
16
FC
15
TC1
14
TC2
13
R1
12
OUT
11
MOTIVE
CONTROL
CIRCUIT
MOTIVE/
OSC
MOTIVE
LOGIC
SOFT SWITCH
PRE DRIVER
INVERTER
BIAS
REFERENCE
VOLTAGE
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
+
–
SECTION 6
DIAGRAMS
• Waveforms
30 Vp-p
10
µ
sec
1.3 Vp-p
30
µ
sec
20 mVp-p
1.5 msec
1V/DIV, 5
µ
s/DIV
0.5V/DIV, 10
µ
s/DIV
20mV/DIV, 0.5 ms/DIV
1
IC702
4
LX
2
IC701
wk
XTO
3
IC601
5
OSC
