Jigs And Tools - Sony DVP-NS300 Training Manual

Testing - TE traverse check:
Earlier you checked the FE signal for symmetry (equal
amount of signal above and below the center Vc point. That
proved the A-D detectors were balanced (equal output) at
normal PB levels. The Traverse waveform (Figure 5-9)
checks the balance of the same detectors dynamically at a
higher light level such as when the optical assembly is
moving to another track or layer.

Jigs and Tools

Extender cable package J6090-116A permits you to move
the Mechanism Deck so you can access areas underneath. You can also access under the MB board and
see the Mechanism operation from the bottom. See Figure 5-10.
FIGURE 5-10 - USING THE TRANSPORT EXTENSION JIG J6090-116A
Figure 5-9 - Traverse waveforms quickly checks the detectors
dynamically. TE is disabled (turned OFF) from Figure 9 -18 screen to
produce this waveform. Signal level approx. 1,6 Vpp SL disc. DC level in
relation to „VC" is ~780 mV.
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5. Testing