
– 72 –
1. Receiver Circuit
●
The light receiver unit receives the infrared signal from the wireless remote control. The receiver ampli
fi
es
and shapes the signal and outputs it.
2. Buzzer Circuit
Fig. 2-1 Buzzer Circuit
Fig. 2-2 Buzzer Operation
●
When the buzzer sounds, an approx.
3.9kHz square signal is output from buzzer
output pin of the microcomputer. After
the amplitude of this signal has been set
to 12Vp-p by a transistor, it is applied
to the buzzer. The piezoelectric element
in the buzzer oscillates to generate the
buzzer’s sound.
DESCRIPTION OF MAIN CIRCUIT OPERATION
MODEL RAI-25RPA, RAI-35RPA, RAI-50RPA
Fig. 1-1
83
Содержание RAM-36NP2A
Страница 45: ... 43 MODEL RAI 25RPA RAI 35RPA RAI 50RPA WIRING DIAGRAM INDOOR UNIT ...
Страница 46: ...Remote Control CIRCUIT DIAGRAM 45 ...
Страница 47: ...CIRCUIT DIAGRAM MODEL RAI 25RPA RAI 35RPA RAI 50RPA 47 ...
Страница 48: ... 49 ...
Страница 49: ... 51 ...
Страница 52: ... 57 ...
Страница 54: ... 61 ...
Страница 56: ... 65 ...
Страница 57: ... 67 ...
Страница 62: ... 73 ...
Страница 69: ... 80 ...
Страница 70: ... 81 ...
Страница 72: ... 83 1 Power does not come on no operation CHECKING INDOOR UNIT ELECTRICAL PARTS ...
Страница 74: ... 85 ...
Страница 75: ... 86 ...
Страница 76: ... 87 HOW TO CHANGE THE SHIFT VALUE for SETTING TEMPERATURE USING WIRED REMOTE CONTROLLER ...
Страница 77: ... 88 ...
Страница 78: ... 89 ...
Страница 79: ... 90 ...
Страница 80: ... 91 CHECKING THE REMOTE CONTROLLER ...
Страница 81: ... 92 PARTS LIST AND DIAGRAM INDOOR UNIT MODEL RAI 25RPA RAI 35RPA RAI 50RPA ...
Страница 85: ... 96 MODEL RAI ECPP PANEL ...
Страница 87: ...HITACHI PM NO 0530E Printed in Malaysia RAI 25RPA RAI 35RPA RAI 50RPA ...