MECH-29
3-34. PB Head LISTA Sensitivity Adjustment and Sensitivity Detection
(25M Mode)
SPEC.
Sensitivity 100±10 (mV/µm)
MODE
SERVO Adjustment Menu “A17 : PBL GAIN 25”
! ATF (PB-L) TP6701 RF/CUE
" H SW (PB-L) TP232 SERVO (F1)
TEST POINT
# GND TG6001 RF/CUE
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 t
he LIST
A Main M
enu “(6)
A
T
F Error Si
gnal Monit
or” so
that the scr
een of
<A
T
F Error
Signal m
onitor>
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 L
ista Main Me
nu “(1) Sensit
ivity Meas
urement”
so that the screen o
f <A
T
F Error Signal m
onitor>
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
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