Panasonic KX-HCM280, Service Manual

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The ZOOM motor, which type is a stepping motor, is driven with the motor driver (IC1002). The
drive system is Constant Current Drive 2W1-2 Phase Excitation Micro Step Drive. It works by 1
step to the direction set by ZMDIR signal, per 1 clock of ZMCLK signal given to IC1002. The motor
current flows as below. In phase A: 6V power Q1004 6pin Q1004 1pin ZAP signal
motor phase A ZAN signal IC1002 14pin IC1002 19pin R1005 GND, or, 6V power
Q1004 3pin Q1004 4pin ZAN signal motor phase A ZAP signal IC1002 16pin
IC1002 19pin R1005 GND In phase B: Q1005 3pin Q1005 4pin ZBP signal motor
phase B ZBN signal IC1002 11pin IC1002 6pin R1006 GND, or, 6V power
Q1005 6pin Q1005 1pin ZBN signal motor phase B ZBP signal IC1002 9pin
IC1002 6pin R1006 GNDThe motor driving direction is determined by ZMDIR signal.
14.2.3.3. Focus Motor Drive Block
FOCUS motor, which type is a stepping motor as ZOOM motor, and which drive circuit is also
same type as ZOOM motor, is driven with the motor driver (IC1001). The drive system is Constant
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