Panasonic AJSDX900P - 24P DVCPRO 50, Service Manual, Page: 59 / 421

MECH-18
1-24. Confirmation of Play Start Envelope
SPEC
Envelope Waveform signal should be rising up immediately at PLAY mode.
TEST POINT
Refer to item “6. Table of Test Point for each adjustment item.”
VTR MODE
REW/REV
→
PLAY, Loading completion
→
PLAY, FF
→
PLAY
TAPE M Cassette (66min, Recorded tape) Tape beginning portion
M.EQ
Oscilloscope
Click this button , then go to item “6. Table of
Test Point for each adjustment item.”.
NOTE:
Shift to PLAY after FF·REW stands up at high
speed. Not suitable beginning or end of tape
portion and low speed condition of mode
switchover condition.
This adjustment must be done after Envelope
Waveform Adjustment.
1. Confirm that the envelope appears immediately,
when the mode is changed from REW to PLAY,
REV to PLAY, FF to PLAY, and Lording to PLAY
mode.
2. If out of spec, adjust S4 post height. (refer to item
“1-1. Post Height Pre-Adjustment”)
Figure 1-24
1-25. REV mode Tape Path Limit Confirmation
SPEC
Each post limit shown in below figure
(Refer to Table 1-25 and Figure 1-25)
VTR MODE
REV
NTSC: VFM3580KM or Blank tape SD
PAL: VFM3580KM or Blank tape
TAPE
HD VFM3782KML or Blank tape
Tape Limit (Refer to figure 1-25)
Post Name
A B C D E F
S5 Post OK OK OK NG NG NG
S4 Post
(Tension Post)
NG OK OK NG NG NG
S1 Post OK NG NG NG NG NG
T1 Post OK OK OK NG NG NG
T3 Post NG NG OK NG NG NG
T4 Post OK OK OK NG NG NG
Table 1-25
1. Place unit into REV mode and confirm the each
post limits is within the specification.
2. If out of specification, adjust the post height by
following the each adjustment procedure (Refer to
Table 1-22 on item 1-22)
Figure 1-25
Click this button , then go to item “6. Table of
Test Point for each adjustment item.”.
(How to set REV mode)
A: UPPER B: FREE C: LOWER
D: CURL E: BEND F: DROP