Panasonic AJD440 - DVCPRO PLAYER, Service Manual

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2-20
[ Adjustment Procedure ]
1. If case of model of TYPE E, F, G and H, adjust
both channels envelope by connect the test point
alternately Lch and Rch.
2. In case of AJ-D940, open the SERVO ADJUST
MENU on Service Menu and select the item “A14
: END SEL 25M”. (this item should be set to
PBL13.)
3. Playback the alignment tape.
4. Adjust S1 and T1 post height so that the envelope
signal is within the specification.
5. When the S1 and T1 posts are adjusted, first
raise the post height and make small the entrance
and exit side of the envelope, then down the post
until envelope becomes flat.
6. With order to adjustment, basically adjust T1 post
for makes flat at exit side of envelope first and
adjust S1 post.
7. After finish this adjustment, unload the tape and
load the tape again, then confirm the shape of
Envelope waveform does not changed.
Figure 3-11-2
3-12. Post Limit Confirmation
(PLAY)
SPEC
Post limit shown in the table
curl does not appear on tape edge
MODE PLAY
TAPE Blank tape
TOOL VFK1149 (Post Driver)
VFK1151 (Nut Driver)
1. Confirm that the tape pass limit follow the as
shown as below table and adjust it in case of
need.
2. Confirm that the kinds of D, E and F condition do
not appeared on the tape as shown in figure.
Post Limit Adjustment
S5 Lower limit or
Free
S5 Post Height
S4 Lower Limit S4 Post Height
S1 Upper Limit Envelope waveform
T1 Upper Limit Envelope waveform
T3 Lower Limit T3 Post Height
T4 Lower limit or
Free
T4 Post Height
Figure 3-12
A: B: FREE C: LOWER
D: CURL E: BEND F: DROP