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WM-EX422
Note on Schematic Diagram
• All capacitors are in µF unless otherwise noted. pF: µµF 50
WV or less are not indicated except for electrolytics and
tantalums.
1
• All resistors are in Ω and
/
W or less unless otherwise speci-
4
fied.
• C : panel designation.
•
: B+ Line.
• H : adjustment for repair.
• Power voltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground under
no-signal (detuned) conditions.
• no mark : PLAY
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal
path.
E
: PB
Note on Printed Wiring Board
• X : parts extracted from the component side.
•
: Through hole.
a
•
: 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 from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
Waveforms
z
1
1.0 Vp-p
125msec
IC701 9
VOLT/DIV : 1V AC
PHOTO CTRL
TIME/DIV : 20msec
2
1.3Vp-p
32.768 kHz
IC701 wl
VOLT/DIV : 0.5V AC
XT1
TIME/DIV : 10 µsec
12
5-4. IC BLOCK DIAGRAMS
IC301 TA2160FN (EL)
30
29
28
27
26
25
24
RF & REF
PRE A
PRE B
BST SW
1
2
3
4
5
6
7
IC601 MM1279XVBE
V
1
PW
2
MOTIVE
W
3
CONTROL
CIRCUIT
GND
4
MOTIVE
MOTIVE
LOGIC
OSC
5
/OSC
DR
6
INVERTER
BIAS
VREF
7
SPEED
REFERENCE
CONTROL
VOLTAGE
START
8
VSP
9
+
IN+
10
12
23
22
21
20
19
18
17
16
PW C
BST
AGC DET
PW A
PW B
AGC
8
9
10
11
12
13
14
15
PV
20
19
U
PRE
DRIVER
PU
18
17
GND
16
VCC
FC
15
SOFT
14
TC1
SWITCH
13
TC2
CURRENT
CONTROL
R1
OUTPUT
12
BIAS
11
OUT
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