Panasonic AJ-D400, Service Manual

Page: 31 / 104

2-14
3-5. Tension Arm PLAY and REV
Voltage Adjustment and
Confirmation
SPEC PLAY : 3.8 V ± 0.05 V
REV : 1.2 V ± 0.3 V
TEST POINT Tension :
Refer to item “2. Table of Test
Point”
ADJ. Tension Gain :
Refer to item “2. Table of Test
Point”
MODE STOP
TOOL Digital Volt Meter
VFK1156 (Black: for PLAY
position)
VFK1155 (Silver: for REV position)
<In case of model except CAM CORDER>
1. Unscrew the 2 screws and remove the Carriage
Support Panel on the Front Loading Unit.
2. Disconnect the connector P3 on the Carriage
Board of the Front Loading Unit.
3. Unscrew the 6 screws and remove the Top Plate
on the Front Loading Unit as shown in figure 3-4-
1.
<In case of model CAM CORDER>
1. Remove the Cassette Up Unit.
< Common procedure >
1. Set VFK1156 (black) as position as shown in
figure 3-4-2.
2. Place the unit into the no tape loading mode.
3. Confirm that the DC voltage at Test point is within
specification (PLAY).
4. If it out of spec, adjust the Adjustment VR so that
the DC voltage is within specification (PLAY).
5. Set VFK1156 (Silver) as position as shown in
figure 3-4-2.
6. Place the unit into the no tape loading mode.
7. Confirm that the DC voltage at Test point is within
specification.
8. If it out of spec, perform the Tension Arm Position
Adjustment again.
3-6. Tension Regulator Spring
Adjustment
SPEC 108 mN-m (11gf)
TEST POINT Tension :
Refer to item “2. Table of Test
Point”
ADJ. Tension Regulator Spring hook (B)
MODE STOP
TOOL VFK1188 (Dial Tension Gauge)
Digital Volt Meter
<In case of model except CAM CORDER>
1. Unscrew the 2 screws and remove the Carriage
Support Panel on the Front Loading Unit.
2. Disconnect the connector P3 on the Carriage
Board of the Front Loading Unit.
3. Unscrew the 6 screws and remove the Top Plate
on the Front Loading Unit as shown in figure 3-4-
1.
<In case of model CAM CORDER>
1. Remove the Cassette Up Unit.
< Common procedure >
1. Place the VTR into no tape loading mode.
2. Insert the tension gauge to push the tension post
to the direction R until the voltage at the Test
Point is 3.8V (PLAY position).
3. Loosen the screw (C) and adjust the position of
hook (B) so that the indication of gauge is within
specification.
Figure 3-6
Loose
Tight