Panasonic AJSDX900P - 24P DVCPRO 50, Service Manual

Page: 46 / 421

MECH-5
1-8. Tension Confirmation
SPEC
PLAY: 0.06N ± 0.01N (6gf ± 1gf)
REV: 0.09N ± 0.02N (9gf ± 2gf)
MODE
PLAY, REV
×
1
TAPE
63 min M size blank tape
TOOL
VFK1145A (Tension Meter)
♦
Please calibrate Tension Meter before tension
measurement by the following procedure.
<Calibration of Tension Meter>
1. Attach the 7 grams calibration plumb to DVCPRO
tape. (It’s tape and plumb are included in
VFK1145.)
2. Set the above tape to the Tension Meter as
shown in figure 1-8-1.
3. Pull up the tape as speed of 33mm/sec and
adjust the Tension Meter so that the meter shows
7 grams (0.07N).
♦
To calibrate Tension Meter the tape must be pulled
up as the direction of tape path of VTR as shown in
figure 1-8-1.
Figure 1-8-1
1.
Play back the beginning portion of the tape.
2. Insert the tension meter between S3 post and S4
post as shown in figure 1-8-2.
3. Confirm that the tension value is within the
specification.
Figure 1-8-2
4. Place the unit in REV x1 mode. (To see how to
set REV x1 mode, refer to 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.”.
5. Insert the tension meter between S4 post and S5
post as shown in figure 1-8-3. (Direction is
reverse)
6. Confirm that the tension value is within the
specification. (Read the meter from rear side as
shown in figure 1-8-3.)
7. If it is out of specification, please perform the
Tension Arm Adjustment.
Figure 1-8-3
NOTE :
Play attention not to give some tape damage.
1-9. Photo Sensor Voltage
Adjustment
SPEC
2.2 VDC ± 0.6 VDC
TEST POINT
Refer to item “6. Table of Test Point for
each adjustment item.”
ADJ.
Refer to item “6. Table of Test Point for
each adjustment item.”
MODE
STOP
TAPE
VFK1423
(Tape Beg./End M Cassette)
M. EQ
Oscilloscope
Click this button , then go to item “6. Table of
Test Point for each adjustment item.”.
1. Open the service menu and select item T
PHOTO or S PHOTO.(To see how to select T
PHOTO or S PHOTO, refer to 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.”.
2. Insert the VFK1423 and measure the voltage
which is shown on the menu.
3. Adjust the VR so that the voltage is within the
specification.
Plumb