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5
4) Turn on the power in the test mode (F. Offset adjustment is found) and move the pickup to the vicinity of the
center of the disc.
5) Turn on the DVD LD and perform Focus Close.
6) Automatically adjust Tracking Balance and perform Tracking Close.
7) Observing RF waveform levels of an oscilloscope, slightly turn skew adjusting screw A and adjust the
oscilloscope so that the levels can be maximized. Repeat this operation three times and fix the levels where
they are maximized.
8) Mix agents A and B of adhesive 601 at a ratio of 1 to 1 and coat a specified part with both agents of the
adhesive. The adhesive is cured about 15 minutes. The coating position is shown in Fig.1.
Note) Do not apply the adhesive to the pickup section and the mechanical unit section other than the specified
part. Because heat is generated, do not mix a great number of adhesives at a time. Use the same number
of adhesives as the original one. Do not apply vibration until the adhesive is fixed.
9) Apply the screw lock to the head of the skew screw and secure it.
- Symptoms at incomplete adjustment
1) Deterioration of error rates
2) Large RF jitters: Waveforms are distorted.
3) Unstable tracking servo: There are such effects as leading-in and unstable servo.
- Connection Diagram
MAIN PCB(SIDE B)
5
6
IC1200
XDV-M8357ZT/UC
6
7
Oscilloscope
TP210
IC702
7
8
A
B
C
D
E
F
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