Rev Tape Pass Confirmation And Adjustment (T4 Post Height Adjustment) - Panasonic AJ-D400P Service Manual

1-22. REV Tape Pass Confirmation and Adjustment (T4 post height adjustment)

C1, C2 ≥ Cp1, Cp2 × 0.75
SPEC.
Lower limit at T3 post on REV
mode
TEST POINT
TP30 (SERVO:F1)
ADJUSTMENT T4 post height
REV × 1
MODE
1. Place unit into REV mode, and confirm the post limit and CTL signal are in the specification. IF not, adjust T4
post follow the below procedure.
2. Turn the Nut of T4 post clockwise or counterclockwise follow the tape limit condition at T3 post. The maximum
rotation angle is 90 degree.
3. Place unit into REV X1 mode and confirm the CTL output level is become more than 75% on play mode.
Confirm the tape pass limit become lower limit at T3 post and the tape does not have curl at T3 and T4 post.
4.However out of specification, adjust T4 post height follow the Post Height Pre-adjustment procedure.
T4 Nut adjustment direction
Direction of adjustment nut of T4
post
Tighten direction
Loosen direction
Post Limit
Post Name
A
×
T3 Post
!
T4 Post
A: Upper
B: FREE
CTL level
mode
Increase
Decrease
Tape limit
B C D
× ×
!
×
! !
C: LOWER D: CURL
C1, C2:REV × 1
Cp1
C1
Cp1, Cp2:PLAY × 1
C2
Cp2
TAPE
VFM3580KM, VFM3680KM
M.EQ
Oscilloscope
TOOL
VFK1151 (Nut Driver)
on REV Lower limit at T3 post
On REV mode
Tape touch to strong
Tape touch to weak
E F
× ×
× ×
E: BEND
D: DROP