Panasonic AJ-YA120AG, Service Manual

Page: 401 / 647

MECH-11
1-17. A/C Head Azimuth and X-Value Adjustment
TP
TP105: R/P L ENV (RF EQ Board: Slot 1)
TP5: R/P L HSW (RF EQ Board: Slot 1)
TP102: CUE (RF CUE Board: Slot 2)
TP4: CTL (A PROC Board: Slot 2)
M. EQ
Oscilloscope
SPEC.
1. HDLP Mode: 250us
≤
t1, t2
≤
+250us
50M Mode: 125us
≤
t1, t2
≤
+125us
2. X-Value: 27 or Less
(Select "X-Value HDLP" on the Service
Mnuand confirm the X-Value.)
TOOL
VFK0357 (Eccentric Driver)
VFK1148A (Hex Driver)
ADJ.
A/C Head VFK1209A (Torque Driver)
MODE
See below VFK0912 (Post Axis Driver)
TAPE
VFM3582KM or VFM3582KL
Figure 1-17-1
1. Play back the X-Value Alignment Tape in the 50M mode.
2. Adjust the Azimuth so that the reference CTL matches with non-recorded portion of the CUE in the phase (t2).
(Refer to the Paragraph “1-13. A/C Head Adjustment Procedure”)
3. Confirm the non-recorded portion of R/P ENV, and select proper HSW.
4. Adjust X-Value so that the reference of HSW matches with the CTL frame lead trigger in the phase (t1). To
adjust X-value, loosen the screws (C) and (D), and adjust the hole (E) by using the Eccentric Driver. At this time
adjust the phase simultaneously with the Azimuth so that the CTL and CUE phase is kept.
5. After tightening the every screw on the A/C Head, tap the top plate (portion as shown in figure 1-13-3) of A/C
Head, and then confirm the phase does not shift.
6. Select the SERVO ADJUST menu on the Service Menu, and select the item “A13: X-VALUE HDLP”.
7. Play back the Alignment Tape, and press the “F” button and confirm that the “PLAY ALIGNMENT TAPE OK?”
message appears.
8. Press the “F” button for more than 3 seconds so that the measuring value is displayed on the screen.
(1) R/P ENV
(2) R/P HSW
(3) Cue
(4) CTL
Reference of HSW
t1 (CUE Phase Shift)
Frame Lead Trigger
Set Center of variation of CTL
t2 (CTL Phase Shift)