MECH-7
1-11. Envelope Waveform
Adjustment
SPEC
V1/Vmax, V2/Vmax, V3/Vmax
≥
0.8
TEST
POINT
Refer to item “6. Table of Test Point for each
adjustment item.”
ADJ.
S1, T1 Post Height
SD VTR & CAM
PLAY (ATF) (25M mode)
VTR
MODE
HD CAM
PLAY (ATF)
NTSC: VFM3582KM
SD VTR & CAM
PAL :VFM3682KM
TAPE
HD CAM
VFM3782KML
M.EQ
Oscilloscope
TOOL
VFK1149B (Post Driver)
Click this button , then go to item “6. Table of
Test Point for each adjustment item.”.
1. Playback the alignment tape.
2. Adjust S1 and T1 post height so that the envelope
signal is within the specification.
3. To adjust the S1 or T1 posts, at first raise the post
height. Then the envelope at the entrance or exit
side becomes small. Then down the post hight
until envelope becomes flat.
4. As the order of adjustment, adjust T1 post to
make it flat at exit side of envelope first and then
adjust S1 post.
5. After finish this adjustment, unload the tape and
load the tape again, then confirm the shape of
Envelope waveform does not change.
Figure 1-11
1-12. Post Limit Confirmation
(PLAY)
SPEC
Post limit is shown in the following table.
Curl does not appear on tape edge
SD VTR & CAM
PLAY (ATF) (25M mode)
VTR
MODE
HD CAM
PLAY (ATF)
TAPE
Blank tape
TOOL
VFK1149B (Post Driver)
VFK1151A (Nut Driver)
1. Confirm that the tape path limit meets
specification in following table. If not, adjust it.
2. Confirm that the D, E and F condition do not
appear on the tape as shown in figure.
Post Limit Adjustment
Method
S5
Lower l or Upper limit
S4 Lower
limit
Post Height Pre-Adj.
S1 Upper
limit
T1 Upper
limit
Envelope waveform Adj.
T3 Lower
limit
T4
Upper, Free or
Lower limit
Post Height Pre-Adj.
Figure 1-12
A: UPPER
B: FREE
C: LOWER
D: CURL
E: BEND
F: DROP
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