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
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Содержание KX-T7456 - Digital 24 Button Speakerphone Display
Страница 4: ...4 DISASSEMBLY INSTRUCTIONS 4 1 HOW TO REMOVE THE LOWER CABINET Procedure 1 4 ...
Страница 8: ...5 IC DATA 5 1 IC1 8 ...
Страница 11: ...11 ...
Страница 15: ...15 ...
Страница 20: ...7 4 DATA COMMUNICATION CIRCUIT 1 Function 20 ...
Страница 24: ...The reset signal is negledted 24 ...
Страница 29: ...8 TROUBLESHOOTING GUIDE 8 1 NO OPERATION 8 2 THE LCD DOES NOT OPERATE 29 ...
Страница 31: ...8 5 SPEAKER PHONE TROUBLE 8 6 TONE DIAL TROUBLE 8 7 TROUBLE OF OHCA 31 ...
Страница 32: ...8 8 HANDSET TROUBLE 9 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 32 ...
Страница 36: ...12 CABINET AND ELECTRICAL PARTS LOCATION 13 ACCESSORIES AND PACKING MATERIALS 36 ...
Страница 49: ...33 37 34 35 36 25 32 ...
Страница 55: ...SW301 CN301 1 2 3 ...
Страница 57: ...1 5 2 6 3 7 4 8 ...
Страница 58: ...9 13 10 14 11 15 12 16 ...
Страница 59: ...17 21 18 22 19 23 20 24 ...