Panasonic AJSDX900P - 24P DVCPRO 50, Service Manual

Page: 56 / 421

MECH-15
1-19. Compensation Adjustment Of
X Value
Please refer to item “3. Compensation Adjustent of X
value” about X value compensation.
Click this button , then go to item “3.
Compensation Adjustmnet of X value.”
1-20. REV Tape Path Confirmation
and Adjustment
(T4 Post Height Adjustment)
SPEC
!
. C1, C2
≥
Cp1, Cp2
×
0.75
NOTE:
C1, C2: CTL output REV (-1) mode
Cp1, Cp2: CTL output PLAY (+1) mode.
"
. Lower limit at T3 post on REV mode.
#
. Curl does not appear on tape at T3 and T4
post.
TEST
POINT
CTL:
Refer to item “6. Table of Test Point for each
adjustment item.”
ADJ.
T4 post height
SD VTR & CAM 25M mode
HD CAM
CTL output level
confirmation mode
VTR
MODE
To see how to set PLAY and REV x1 mode,
refer to item “6. Table of Test Point for each
adjustment item.”
NTSC: VFM3582KM SD VTR & CAM
PAL: VFM3582KM
TAPE
HD CAM VFM3782KML
M.EQ
Oscilloscope
TOOL
VFK1151A (Nut Driver)
Click this button , then go to item “6. Table of
Test Point for each adjustment item.”
1. Confirm that the CTL level on 25M mode(SD VTR
& CAM) or CTL output level confirmation mode(HD
CAM).
2. Place unit into REV X1 mode and confirm the CTL
output level becomes more than 75% at play mode.
Confirm the tape path limit becomes lower limit at
T3 post and the tape does not have curl at T3 and
T4 post.
3. If it is out of specification, adjust T4 post by
following procedure.
4. Turn the Nut of T4 post clockwise or
counterclockwise by the tape limit condition at T3
post. The maximum rotation angle should be 45
degree.
5. However if still it is out of specification, adjust T4
post height by following the item “4-1. Post Height
Pre-adjustment procedure”.
[T4 Nut Adjustment Direction]
Direction CTL Level
Condition of lower
limit on T3 Post
Tighten Increase Tape touch to strong
Loosen Decrease Tape touch to weak
[Post limit]
Post A B C D E F
T3 NG NG OK NG NG NG
T4 OK OK OK NG NG NG
Figure 1-20-1
Figure 1-20-2
A: UPPER B: FREE C: LOWER
D: CURL E: BEND F: DROP