Panasonic AJSD955B - DVCPRO50 STUDIO DECK, Руководство по обслуживанию, Страница: 108 / 562

MECH-29
3-34. PB Head LISTA Sensitivity Adjustment and Sensitivity Detection
(25M Mode)
SPEC.
Sensitivity 100±10 (mV/
µ
m)
MODE
SERVO Adjustment Menu “A17 : PBL GAIN 25”
!
ATF (PB-L) TP5701 RF (F8) (not TP6701 (R/P-L ATF))
"
H SW (PB-L) TP232 SERVO (F7)
TEST POINT
#
GND TG102
ADJUSTMENT
SERVO Adjustment Menu: “A17 : PBL GAIN 25”
TAPE
NTSC: VFM3581KM or VFM3581KL(LISTA)
(PAL: VFM3681KM or VFM3681KL(LISTA))
1. Open the Service Menu and select “A17: PBL GAIN 25” in the “SERVO ADJUST” menu. Set the Lista software
in 25M mode. 25M and 50M mode can be changed by “0” key.
2. Playback a LISTA alignment tape (VFM3581KM or VFM3581KL).
3. Select the LISTA Main Menu “(6) ATF Error Signal Monitor” so that the screen of <ATF Error Signal monitor>
appears. Then press Enter to start the software.
4. When the picture is appeared as shown in figure 3-34-3, adjust ATF Gain (A17: PBL GAIN 25) so that the “Sens.
Value:” is in the Specification.
5. After finishing the Adjustment, press ESC key to return the main menu.
6. Select the Lista Main Menu “(1) Sensitivity Measurement” so that the screen of <ATF Error Signal monitor>
appears (refer to 3-34-2).
7. Playback a Lista alignment tape and press “ENTER” to start the Sensitivity measurement.
8. Confirm that the sensitivity value is within the specification. (refer to figure 3-34-3).
9. If it is out of specification, return to item 3.
In case “ATF Error Signal Monitor”
or “sensitivity Measurement” is selected.
Select for sensitivity detection
Select for Linearity adjustment
Select for sensitivity
adjustment
Figure 3-34-1
Figure 3-34-2