Panasonic DVD-K29GCS - Manual (Page 27)

10.4.1.1. Adjustment procedure
1. While pressing PAUSE and OPEN/CLOSE buttons on the
main unit, press "5" on the remote control unit.
2. Confirm that "J_xxx/yyy_zz" is shown on the front display.
For your information:
"yyy" and "zz" shown to the right have nothing to do with
the jitter value. "yyy" is the error counter, while "zz" is
the focus drive value.
Note:
Jitter value appears on the front display.
3. Play test disc T30 (central periphery).
4. Adjust tangential adjustment screw so that the jitter value is
minimized.
5. Play test disc T30 (central periphery).
6. Adjust tilt adjustment screw 1 so that the jitter value is
minimized.
7. Play test disc T30 (central periphery).
8. Adjust tilt adjustment screw 2 so that the jitter value is
minimized.
9. Repeat adjusting tilt adjustment screws 1 and 2 alternately
until the jitter value is minimized.
10. Finally please reproduce T01 (inner periphery) and T43
(outer periphery) and check the jitter value. (Please
readjust, when the jitter value is extremely different.)
10.4.1.2. Important points
1. Make tangential adjustment first, and then make tilt
adjustment.
2. Repeat adjusting two or three times to find the optimum
point.
3. Finish the procedure with tilt adjustment.
Jitter value depends on the model:
1.
If the jitter value changes like B, the optimum point is easy to
find.
2. If the jitter value changes like A, set the optimum point near the
middle.
Note:
When FFC has covered the adjustment screw, please insert
a screwdriver, evading FFC(s).
10.4.1.3. Check after adjustment
Play test disc or any other disc to make sure there is no picture
degradation in the inner, middle and outer peripheries, and no
audio skipping. After adjustment is finished, lock each
adjustment screw in position using screw lock.
10.4. Optical adjustment
10.4.1. Optical pickup tilt adjustment
Measurement point Adjustment point Mode Disc
Tangential adjustment screw
Tilt adjustment screw T01 (inner periphery) play
T30 (central periphery) play
T43 (outer periphery) play DVDT-S15 or DVDT-S01
Measuring equipment Adjustment value
None (Main unit display for servicing is used.) Adjust to the minimum jitter value.
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DVD-K29GCS