Harman Kardon FL8400 - Page 22

FL8400
CIRCUIT ADJUSTMENT
Step | Connect Setting Adjust | Remarks
Focus Gain Adjustment
1 See figure 13 In TEST
MODE 2
2 To increase the focus gain, turn VR102 clockwise.
Tracking Gain Adjustment
1 See figure 14 In TEST
MODE 2
2 Place PHILIPS test disc 5A in the tray and play section with the 800;.m black dot, Confirm
there is no skipping.
3 If there is any skipping, adjust VR103 to reduce the tracking servo gain untill no skipping occurs.
To reduce the gain, turn VR103 rclockwise.
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Obtain a = ailve aa of about 200 O mV,
VOLT/DIV : 50 mV
TIME/DIV : 5 ms
Oscilloscope Set
R193 (FE) ¢
Figure 13. Focus Gain Adjustment
VOLT/DIV : 100 mV
TIME/DIV ; 1 ms
Oscilloscope Set
J304 (G)O
Figure 14. Tracking Gain Adjustment
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