Disc Sensor Level Adjustment; Disc/Table Sensor Check - Sony DVP-CX850D Service Manual
Hide thumbs
Also See for DVP-CX850D:
- Service manual (124 pages) ,
- Operating instructions manual (88 pages) ,
- Operating instructions manual (85 pages)
Advertisement
7-2. SO-11 BOARD POSITION
ADJUSTMENT
Adjustment Procedure:
1.
Enter the test mode. Select "2. Drive Manual Operation" from
the test menu.
2.
Select "8. 200CHG MechaCon 2" from the operation menu.
3.
Press the r button to release chucking.
4.
Press the PAUSE button so that the disc table rotates
continuously in the clockwise direction.
5.
Loosen the screw fixing the SO-11 board.
6.
Turn RV701 on the TS-150 board fully counter-clockwise.
7.
Observe the SI-E signal, T. SENS2 signal and T. SENS3 signal
at pins-2, -4 and -5 of CN704 on TS-150 board. Confirm that
the phase difference between the peak position of the SI-E signal
and the center position of the period when both the T. SENS2
signal and T. SENS3 signal are High, is 2.5 ms or less. If this
specification is not satisfied, adjust the position of the TS-150
board until the above-described specification is satisfied.
8.
Tighten the screw fixing the SO-11 board.
RV701
Fig. 7-4
Fig. 7-5
Adjust the position (angle) of the TS-150 board until the top peak
of the SI-E signal (pin-2 of CN704 on TS-150 board) is positioned
at the center of the period when both the T. SENS2 signal and T.
SENS3 signal are High.
(Clockwise direction when viewed from the top: turning to the right)
T.SENS2
T.SENS3
SI-E
SI-E : Peak = 0 ± 2.5 mS
(0 : Center of T.SENS2 = "H" and T.SENS3 = "H")
7-3. DISC SENSOR LEVEL
ADJUSTMENT
Adjustment Procedure:
1.
Enter the test mode. Select "2. Drive Manual Operation" from
the test menu.
2.
Select "8. 200CHG MechaCon 2" from the operation menu.
3.
Press the r button to release chucking.
4.
Press the PAUSE button so that the disc table rotates
continuously in the clockwise direction.
5.
Observe the SI-E signal at pins-2, -4 and -5 of CN704 on TS-
150 board. Adjust RV701 on the TS-150 board so that the duty
ratio of the waveform becomes 4:1.
SI-E signal at
pin-2/CN704
7-4. DISC/TABLE SENSOR CHECK
Adjustment Procedure:
1.
Enter the test mode. Select "2. Drive Manual Operation" from
the test menu.
2.
Select "8. 200CHG MechaCon 2" from the operation menu.
3.
Remove the disc from the disc table.
4.
Confirm that, when you press the CLEAR button, the Disc
Count indicates 0, and the disc table rotates so that the Disc
No. 2 comes to the front of the door and stops.
— 3 —
Peak
Peak
Fig. 7-6
VH = 3 V (saturated)
VL = 1.5 ± 0.5 V
Fig. 7-7
Advertisement
