Panasonic AJ-YA120AG, Руководство по обслуживанию

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MECH-20
1-31. LISTA Linearity Adjustment and Waving Measurement
TP
TP405: ATF ERR RPL/TRL (RF/EQ Board: Slot 1), TP5: R/P L HSW (RF/EQ Board: Slot 1),
TG1: GND (RF/EQ Board: Slot 1)
ADJ.
S2 and T2 Post height
Service menu:
A09 RPL LIN HDLP
MODE
PLAY
TAPE
VFM3781KML (LISTA)
LISTA
AJ-HD1500 [100M: 1800rpm]
TOOL
VFK1149B (Post Driver)
SPEC.
Linearity: less than 3um, Waving: less than 1.5um
1. Select “<3> AJ-HD1500” [100M: 1800rpm] on the LISTA software.
2. Connect the LISTA cable to the Test Points.
3. Open the SERVO ADJUST Menu and select the
A09: RPL LIN HDLP menu.
4. Play Back the LISTA Alignment Tape.
5. Select the item “<2> Linearity Measurement” on the LISTA Main Menu, then Linearity Waveform appears.
6. When the waveform is displayed on the screen, press the “BS (Back Space)” key to cauterize the waveform.
Adjust S2 and T2 post heights by using the post driver so that the linearity waveform becomes as flat as
possible.
(
♦
Adjust linearity waveform between the red dot lines on the screen. Disregard the bending part at the exit
side and the square at the entrance side.)
7. After the Linearity Adjustment, measure the numerical value of linearity and waving by pressing the space key.
POINT:
The left side of waveform (entrance side) is adjusted by height of S2 post and the right side of waveform (exit
side) is adjusted by height of T2 post.
Lower part of above waveform is displayed as the cylinder lead.
When the post driver is removed from a post, linearity waveform may change.
After finishing this adjustment, eject the tape and insert the tape again to confirm that the shape of linearity
waveform does not change.