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Tracking Servo Loop Gain - Sony CDU31A Series Service Manual

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5-1-5 Tracking Servo Loop Gain
a.
Change the BNC (one end) cable connection location
to TE-2 from FE-2 tenninal. (Refer to Fig. 5-1-5)
b.
Change the BNC (one end) cable connection location
to _TE-3 from FE-3 tenninal. (Refer to Fig. 5-1-5)
c.
Set mode of Frequency Response Analyzer as below.
(Refer to Instruction Manual for detail)
Disturbance frequency
l .2kHz
Disturbance amplitude
Integration time
Analysis mode
Float
IOOmV nns
5 times
(both CH)
CH-1/CH-2
GND
d.
Select Play TNO by hitting the IFIOJ key in Test Mode
menu.
e.
Select No. 18 with arrow key, then hitlEnterJkey.
f.
Hit IMeasureJ button on the analyzer to start the
measurement of Tracking Servo Loop Gain.
g.
After for a while, check if the Tracking Servo Loop
Gain indicated on the analyzer, meets specification of
0
±
0.5dB.
h.
If the Tracking Servo Loop Gain does not meet the
specification, adjust the RVI04 so that its Gain is
within 0
±
0.3dB during above measuring.
BNC Cable (Application)
Frequency Response Analyzer
Fig. 5-1-5 Tracking Servo Loop Gain Adjustment
5-5

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