– 69 –
Fig. 1-1
˭ˍˍˍ
ˮˍˍː
˭ˍˍˏ
˭ˍˍˎ
ˮˍˍˍ
ˮˍˍˑ
˟ˍˍˏ
˟ˍˍ˒
ˮ
ˍˍ
ˎ
˶ˠˍˍˍ
ˮˍˍ˒
ˮˍ
ˍ
˓
˟ˍˍˍ
˭ˍˍ˒
ˮˍˎː
ˮˍˎˍ
ˮˍˎˎ
ˮ
ˍ
ˎˏ
˭ˍˍˑ
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˥˟ˍˍˍ
ˎ
ˏ
˔
ˑ
˒
ː
˓
ˍ
˨751
ˮ631
˟ˍˏˎ
˶ˠˍˏˍ
˩
˟˪ˍˌ
ˍ
ˎ
ˏ
ː
ˑ
˒
C131
C751
C621
ˮ751
˩
˥ˢ˽
FM Rotation No.
Feedback
Indoor Fan
PWM Output
˟ˍ
ˌ
ˑ
ˇ
ˉ
˥˪˫˱˰
ˣ˪D
ˠˍˎˍ
ˉ
ˌ˲
ˇ
˶ˠˍˎˍ
ˮ
ˍ
ˍ
˔
˟ˍ
ˌ
ˏ
ˏˑ˲
˥˟ˬˎ
˟ˍˍˑ
˨ˍˍˍ
˟ˍˍː
ˠˍˍˍ
ˮ
ˍ
ˍ˕
˥˟ˬˍ
ˉ
ˉ
ˇ
˟ˍˌˎ
ˇ
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ˑ˲
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˥˟ˍˎˍ
˟ˍˎˏ
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˴˝ˉ˒ˬˉ˰
14
40
Power to operate indoor unit (DC35V) is generated at the power supply in outdoor unit and it is sent to indoor unit
through the connecting cord C and D.
Then, DC 12V (12V line) is generated using DC/DC converter from the voltage sent from outdoor unit, as the
control voltage of 12V is required to drive the auto sweep motor and others.
Furthermore, 5V (5V line), which is necessary to drive the microcomputer and to control the fan motor, is generated
using three-terminal regulator IC121.
1. Power circuit
MODEL RAS-25WX8, RAS-35WX8
DESCRIPTION OF MAIN CIRCUIT OPERATION
0V
35V
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