Pioneer DVH-3900MP/XZ/EW5 Service Manual page 70

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Figure 24 (Stepping motor phase signal A+, A-, B+, B- when sled move to origin point)
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Figure 25 (Voltage condition about DAC IC)
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CH1 CN1201(2)
CH2 CN1201(3)
CH3 CN1201(1)
CH4 CN1201(4)
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CH1 IC1401(5)
CH2 IC1401(6)
CH3 IC1401(10)
CH4 IC1401(4,9)
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