Panasonic AJ-D400, Service Manual

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2-27
3-18. A/C Head Azimuth and X-value Adjustment (50M)
TEST R/P ENV L
POINT R/P HSW L
CUE OUT
CTL OUT
Refer to item “2. Table of
Test Point. As shown in below figure.
25M mode : -250µs
≤
t1, t2
≤
+250µs
50M mode : -125µs
≤
t1, t2
≤
+125µs
M. EQ Oscilloscope
SPEC
TOOL VFK0357 (Eccentric Driver)
ADJ. A/C Head each screw VFK1148 (Hex Driver)
MODE See below VFK1209 (Torque Driver)
VFK1375 (Hex Bit) TAPE NTSC : VFM3582KM or VFM3582KL
PAL : VFM3682KM or VFM3682KL
(Classified list) (CTL Reference)
TYPE MODEL TYPE Reference (Trigger)
A AJ-D950, AJ-D950A B, C Rising edge : refer to below figure 1 (4a).
A Falling edge : refer to below figure 1 (4b).
B AJ-D90, AJ-D900W,
AJ-D910WA, AJ-PD900W
(VTR mode)
TYPE Mode
C AJ-D92, AJ-D94, AJ-D95DC A, C 25M/50M : ATF PLAY mode by RP Head. (refer to
Head Adjustment mode] on “Table of Test Point”.)
B 25M : 25M PLAY, 50M : 50M PLAY
1. Set the VTR mode on Service Menu with type A and C models.
2. Set the VTR in 25M mode and playback an X-value Alignment tape.
3. Adjust screw (F) so that the CTL and Lack part of CUE (t2) is match in the phase. (refer to A/C Head
Adjustment Procedure).
4. Confirm the lack track of envelope, and remember the HSW is high or low at the portion (H SW High or Low is
changed at each tape loading).
5. Adjust A/C Head Horizontal position so that the memorized HSW and CTL trigger at the frame start is match
in the phase (t1). The frame start CTL is located at the edge between 6 : 4 and 5 : 5 portion. To adjust A/C
Head Horizontal position, loosen the screw C and D, adjust the hole E by VFK0357. After adjustment tighten
the screw C and D with 24.5cN-m (2.5Kg) torque. At this time adjust the phase simultaneously with Azimuth so
that the CTL and CUE phase is kept.
6. Hit the top plate (portion L as shown in figure) of A/C Head lightly by a pointed end of Eccentric driver, then
confirm the phase is not shifted finally.
7. Set the VTR in 50M mode and confirm the timing is in specification. If it out spec., adjust this item again.
L