Sony DVP-S300 Training Manual page 101

MB board. B. LOADING MOTOR: It has to be 7-12 ohm at CN011 between Pin 1
& Pin 2 on MB board.
(Refer to the figure below)
If motor is below 7 ohm, then, the motor may become defective. If this is the case,
replace OPTICAL PICKUP.
DESCRIPTION PART NUMBER
KHM-220AAA/J1RP 8-820-081-03