Envelope Waveform Adjustment; Post Limit Confirmation (Play) - Panasonic AJ-SDX900P Service Manual

1-11. Envelope Waveform
Adjustment
V1/Vmax, V2/Vmax, V3/Vmax ≥ 0.8
SPEC
TEST
Refer to item "6. Table of Test Point for each
POINT
adjustment item."
ADJ.
S1, T1 Post Height
VTR
SD VTR & CAM
MODE
HD CAM
TAPE
SD VTR & CAM
HD CAM
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
PLAY (ATF) (25M mode)
PLAY (ATF)
NTSC: VFM3582KM
PAL :VFM3682KM
VFM3782KML
MECH-7
1-12. Post Limit Confirmation
(PLAY)
SPEC Post limit is shown in the following table.
Curl does not appear on tape edge
VTR
SD VTR & CAM
MODE
HD CAM
TAPE
Blank tape
TOOL
VFK1149B (Post Driver)
VFK1151A (Nut Driver)
1. Confirm that the
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
S5 Lower l or Upper limit
S4 Lower limit
S1 Upper limit
T1 Upper limit
T3 Lower limit
T4 Upper, Free or
Lower limit
A: UPPER
D: CURL
Figure 1-12
PLAY (ATF) (25M mode)
PLAY (ATF)
tape path limit
Adjustment Method
Post Height Pre-Adj.
Envelope waveform Adj.
Post Height Pre-Adj.
B: FREE C: LOWER
E: BEND F: DROP
meets