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7.7. JOG DIAL CIRCUIT
1) Circuit Operation
This unit is equipped with the JOG switch, which makes the settings of the volume, function selection
speed dial, etc. easy and convenient. This JOG switch consists of 2-phase rotary encoder, and the
gate array of IC1 counts the number of the rotation to control. The sampling cycle is 1ms and
provided with the chattering protective circuit whose available pulse width is 1ms or more.
These are the rotary encoder inputs, and sampled 1 kHz (1 msec)/cycle. The built-in chattering
protective circuit neglects the input pulse of 1 msec or less. The high pulse of 2 msec or more is
available. The availability of the pulse with the width of 1~2 msec is not ensured.
The changed number of these 2-phase inputs is counted cumulatively. The maximum counting value
is 255.
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Summary of Contents for KX-T7453
Page 7: ...5 IC DATA 5 1 IC1 7 ...
Page 10: ...10 ...
Page 15: ...15 ...
Page 21: ...The reset signal is negledted 21 ...
Page 26: ...8 2 THE LCD DOES NOT OPERATE 26 ...
Page 28: ...8 5 SPEAKER PHONE TROUBLE 8 6 TONE DIAL TROUBLE 8 7 HANDSET TROUBLE 28 ...
Page 29: ...9 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 29 ...
Page 33: ...13 ACCESSORIES AND PACKING MATERIALS 33 ...
Page 39: ... 39 ...
Page 41: ...41 ...
Page 43: ...43 ...
Page 48: ...1 5 2 6 3 7 4 8 ...
Page 49: ...9 13 10 14 11 15 12 16 ...
Page 50: ...17 21 18 22 19 23 20 24 ...
Page 51: ...33 34 35 36 25 32 ...
Page 57: ...SW301 CN301 1 2 3 ...