Pioneer PD-TM2 Service Manual page 35

@ Objective To optimize the focus servo loop gain.
CHI CH2 @ Adjustment location | VR152 (FCS. GAN)
20 mV/division 5mV/division
[Procedure]
Pin 5 (FCS. IN) [O
Pin 4 (GND)
Figure 4
Focus Gain Adjustment
Higher gain Optimum gain . Lower gain
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