LG CM7420 Service Manual page 62

2. MOTOR DRIVE WAVEFORM
SP- SL-
SP+ SL+
Figure 2-1. SP- & SP+ for driving Spindle motor Figure 2-2. SL- & SL+ for driving Spindle motor
IC408 pin17, pin18 IC408 pin11, pin12
Figure 2-3. LO- & LO+ for driving Tray motor
IC408 pin9, pin10
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