Samsung RSE8KPAS Dokumentacja Strona 79

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79
Circuit Descriptions
12
-6) Key Scan and Display Circuit
1) Key Scan and display operation.
The model uses a decorder IC which 4 inputs and 9
outputs. If the IC 9 decorder (TC4028BP) receivesd
signals from MICOM pins (36), an output signal per
2 miliseconds comes out from Q3, Q41, Q8, Q6, Q9,
Q7, Q0, Q2, and Q4 pin in sequence. This signal
enters to a driver IC input terminal of the CoolSelect
Zone
TM
PCB and IC5 (TD 62783AP), then approximate
11V peaks will generate from an output terminal as
shown on the next page.
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