Panasonic DVCPRO HD AJ-HDC27VP Service Manual page 573

4-5. 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: TP402
ADJ.
Tension Gain: VR401
MODE
STOP
TOOL
Digital Volt Meter
VFK1156 (Black: for PLAY position)
VFK1155 (Silver: for REV position)
1. Remove the Cassette Up Unit.
2. Set VFK1156 (black) at the position as shown in
figure 4-4-2.
3. Place the unit into the no tape loading mode.
4. Confirm that the DC voltage at the test point is
within the specification (PLAY).
5. If it is out of spec, adjust the VR so that the DC
voltage is within the specification (PLAY).
6. Set VFK1156 (Silver) at the position as shown in
figure 4-4-2.
7. Place the unit into the no tape loading mode.
8. Confirm that the DC voltage at the test point is
within the specification.
9. If it is out of spec, perform the Tension Arm
Position Adjustment again.
4-6. Tension Regulator Spring
Adjustment
SPEC
TEST POINT
ADJ.
MODE
TOOL
1. Remove the Cassette Up Unit.
2. Place the VTR into no tape loading mode.
3. Push the tension post to the direction R by the
tension gauge as shown in Figure 4-6 until the
voltage at the test point becomes 3.8V (If means
PLAY position).
4. Loosen the screw (C) and adjust the position of
hook (B) so that the indication (tension) of gauge
is within the specification.
Then fighten the screw (C) and reconfirm tension
is within the specification.
Loose
Tight
MECH-6
110 ± 10 mN-m (11 ± 1gf)
Tension: TP402
Tension Regulator Spring hook (B)
STOP
VFK1188A (Dial Tension Gauge)
Digital Volt Meter
Figure 4-6