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1-10. Stepping motor circuit
The motor is driven by magnetism formed in the areas of the coils and the stator. Rotation begins when a HIGH signal is
applied to MICOM Pin 33 of IC10 (TA7774F). This causes an output of HIGH and LOW signals on MICOM pins 34 and 35.
Explanation)
The stepping motor is driven by sending signals of 3.33 mSEC via MICOM pins 33, 34, and 35, as shown in
the chart below. These signals are output via terminals 10, 11, 14, and 15 via input terminals 3, 6, and 8 of
IC10 (TA7774F), the motor drive chip. The output signals allow the coils wound on each phase of the stator to
form a magnetic field, which causes rotation. Input to the terminals INA and INB of IC10 as shown in the chart
below drives the motor.
EXPLANATION FOR MICOM CIRCUIT
- 39 -
TA7774F
CON9
R56
R57
R58
INA
INB
A
B
A
B
CCW (Reverse rotation)
(Positive rotation) CW
Содержание GR-B277
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Страница 52: ...EXPLANATION FOR MICOM CIRCUIT 52 ...
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Страница 54: ...EXPLANATION FOR MICOM CIRCUIT 54 ...
Страница 55: ...2 3 DISPLAY ASSEMBLY part diagram 1 GR L267 G267 P277 LCD Display EXPLANATION FOR MICOM CIRCUIT 55 ...
Страница 56: ...2 GR L267 G267 P277 LED Display EXPLANATION FOR MICOM CIRCUIT 56 ...
Страница 57: ...3 GR B277 EXPLANATION FOR MICOM CIRCUIT 57 ...
Страница 58: ...2 4 DISPLAY circuit diagram 1 GR L267 G267 P277 LCD Display EXPLANATION FOR MICOM CIRCUIT 58 ...
Страница 59: ...2 GR L267 G267 P277 LED Display EXPLANATION FOR MICOM CIRCUIT 59 PWB ASSEMBLY DISPLAY ...
Страница 60: ...3 GR B277 EXPLANATION FOR MICOM CIRCUIT 60 ...
Страница 63: ...2 GR B277 EXPLANATION FOR MICOM CIRCUIT 63 ...
Страница 64: ...EXPLANATION FOR MICOM CIRCUIT 64 ...
Страница 69: ...CIRCUIT 69 3854JD1110A ...
Страница 70: ...CIRCUIT 70 3854JD1110A ...
Страница 71: ...CIRCUIT 71 3854JD1110A ...
Страница 119: ...6 BLOCK DIAGRAM TV RADIO 119 ...
Страница 134: ...P No 3828JD8793E FEB 2005 Printed in Korea ...