Panasonic DVC PRO Studio AJ-D950P Service Manual page 813

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3-6-21 A/C Head Azimuth and Horizontal Position Adjustment
Specification 25MMode -250us<=t1, t2<=+250us
50MMode -125us<=t1, t2<=+125us
A/C Head
Adjustment
Mode Playback
Tape
VFM3582KM (A/C Head H. Position)
1. Set the VTR in 25M Mode and playback an Alignment Tape (A/C Head H. Position).
2. Adjust Azimuth so that the CTL and CUE drop portion is match (Refer to Azimuth Adjustment).
3. Connect a scope CH1 to TP201 on H3 board and CH2 to TP722 on F1 board. Then find the R/P ENV lack
portion, and remember the H_SW is High or Low at the portion. (H_SW High or Low is changed at each
tape loading.)
4. Adjust A/C Head Horizontal Position so that the memorized H_SW and CTL trigger at the frame start is
matched. The frame start CTL is located at the falling edge between 6:4 and 5:5 portion. To adjust the
Horizontal position loosen screw C and D then adjust horizontal position by eccentric driver at hole E.
5. After adjustment, hit gently at L portion to remove the mechanical distortion. Then tighten the screws and
confirm the above specification.
6. Set VTR into 50M PB Mode, and confirm the timing is in the specification. If it is not adjust this item again.
R/P ENV R/P ENV
TP201:H3 TP201:H3
H_SW H_SW
TP722:F1 TP722:F1
CUE CUE
TP101:H1 TP101:H1
CTL CTL
TP30:F1 TP30:F1
5 5 5 5
‚ k
Lo Lo
Hi Hi
t1:CUEˆÊ'ŠƒYƒŒ t1:CUEˆÊ'ŠƒYƒŒ
t1 :CUE Phase Gap
4 6 4 6 6 4 6 4
TP201 R/P ENV L(RFEQ:H3)
Test Point
TP722 R/P HSW (SERVO:F1)
TP101 CUE AUDIO (CUE:H1)
TP30 CTL (SERVO:F1)
M. EQ.
Oscilloscope
Tool VFK0357(Eccentric Driver)
t2:CTLˆÊ'ŠƒYƒŒ t2:CTLˆÊ'ŠƒYƒŒ
t2 :CTL Phase Gap
5 5 5 5 5 5 5 5 5 5 5 5