A/C Head Tilt Adjustment; A/C Head Height Adjustment - Panasonic AJ-SDX900P Service Manual

1-14. A/C Head Tilt Adjustment

SPEC
Curl does not appear on tape edge.
Lower limit at T3 post
ADJ.
SCREW A, G (A/C Head)
VTR
SD VTR & CAM
MODE
HD CAM
TAPE
Blank tape (For the long time play models,
long time recorded tape should be used)
TOOL
VFK1148A, VFK1178A (Hex Driver)
CTL output level confiramation
procedure is mentioned on item "6. Table of Test Point
for each adjustment item."
Click this button , then go to item "6. Table of
Test Point for each adjustment item.".
1. Play back the tape and adjust the screw (A) for
adjustment of A/C Head tilt so that the tape path
has lower limit without curl at T3 post.
2. For adjustment, loosen the screw (G) and make
curl on tape at lower flange of T3 post by
loosening screw (A). And tighten the screw (A)
accordingly to find the point of curl disappeared.
After finish adjustment for screw (A), tighten the
screw (G) with 10cN-m (1.0Kg/cm) of torque.
NOTE :
1. In case of turn clockwise the screw (A).
→
Tape goes up at T3 post.
In case of turn counter-clockwise the screw
(A).
→
Tape goes down at T3 post.
2. When the screw (A) adjustment is finished,
screw adjustment should be finished in
tightening direction. And confirm that the
screw (A) isn't loose.
3. Adjustment and confirmation should be
performed alternately for each A/C head
adjustment (Azimuth and Height).
Figure 1-14
PLAY(25M mode)
PLAY(CTL output level
confirmation mode)
mode setting

1-15. A/C Head Height Adjustment

SPEC
See below
TEST
CUE AUDIO & CTL:
POINT
Refer to item "6. Table of Test Point for each
adjustment item."
ADJ.
SCREW B, H (A/C Head)
VTR
SD VTR & CAM
MODE
HD CAM
TAPE
SD VTR & CAM
HD CAM
M.EQ
Oscilloscope
TOOL
VFK1150A (Nut Driver)
VFK1190 (Hex Wrench)
CTL output
procedure is mentioned on item "6. Table of Test Point
for each adjustment item."
Click this button
Test Point for each adjustment item.".
<Specification of CUE and CTL output level>
Model
SD VTR
SD & HD CAM
1. Press and Lift up A/C Head lightly as indicated in
following figure, then confirm that the CTL and
CUE output level is within the specification.
2. If it is out of spec., loosen the screw H and adjust
the screw B until Cue output is maximized.
3. Confirmation of the level have to be done after the
screw (H) is tighten completely. (refer to A/C Head
Adjustment Method)
4. A/C head height adjustment should be done with
Azimuth and X Value adjustment alternately.
MECH-10
PLAY(25M mode)
PLAY(CTL output level
confirmation mode)
NTSC: VFM3582KM
PAL: VFM3682KM
VFM3782KML
level confiramation
, then go to item "6. Table of
CUE
C1, C2 ≥ 1.8 V
A = Amax
C1, C2 ≥ 220m V
A = Amax
Figure 1-15-1
Figure 1-15-2
mode setting
CTL