Pioneer pl-530 Service Manual page 36

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9.3 MOTOR RACES

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MOTOR $PEED ADJUSTMENTS

When it proves impossible to adjust the fine speed

controls to give the correct speeds, the motor may

be adjusted as foliows.

1. Set the frne speed adjustment controls on the'

stereo turntable to their mechanical centers

(approx. in the middle).

2. The separats volume-type controls on the P.C.

Board PWG-009 are accessible for both 33 and

45 rpm adjustments. Use a small screwdriver to

tum these preset controls to give synchroniza-

tion as indicated by the stroboscopie speed

indicator on the record player.

3. When even turning the controls fails' to give

the required adjustment, refer to Schematic

diagam on page 12, and change R223 (33-1/3

rpm) and R22e (45 rpm) within the range 1.5ksl

to 5.6k4 before repeating the adjustment.

Check the connections to terminals L3,

and 15.

Block 3 is defective.

Is the voltage between Q,. base on the

driving current control assembly and

terminal4 equal to 15V?

Block 2 is defective.