10.4. Optical adjustment
10.4.1. Optical pickup tilt adjustment
Measurement point | Adjustment point |
| Mode | Disc |
| Tangential adjustment screw | T01 | (inner periphery) play | |
| Tilt adjustment screw | T30 | (central periphery) play |
|
|
| T43 | (outer periphery) play |
|
Measuring equipment |
| Adjustment value |
| |
None (Main unit display for servicing is used.) | Adjust to the minimum jitter value. |
| ||
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.)
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.
10.4.1.2. 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.
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