Panasonic AJ-YA120AG, Service Manual

Page: 274 / 647

MECH-4
1-7. PLAY Voltage Adjustment
TP
TP3: A_PROC Board (Slot 2)
ADJ.
VR2: Mech. I/F Board
MODE
STOP
TOOL
VFK1588 (PLAY Position Fixture)
Digital Volt Meter
SPEC.
3.8 V ± 0.05 V
1. Set the VFK1588 (PLAY Position Fixture) as
shown in the figure 1-7-1.
2. Open the “SERVO ADJUST” menu in the Service
Menu and select the item “A07: TENSION”.
Place the unit in the loading completion mode
without cassette tape. (Refer the note in Paragraph
1-6.)
3. Adjust VR2 so that the voltage at TP3 is in the
specification.
Figure 1-7-1
1-8. Tension Regulator Spring
Adjustment
TP
TP3: A_PROC Board (Slot 2)
ADJ.
Tension Spring Adjust Screw
MODE
STOP
TOOL
VFK1188A (Dial Tension Gauge)
Digital Volt Meter
SPEC.
100mN ± 10mN (1gf ± 1gf)
1. Open the “SERVO ADJUST” menu in the Service
Menu and select the item “A07: TENSION”.
Place the unit in the loading completion mode
without cassette tape. (Refer the note in Paragraph
1-6.)
2. Push the tension post in the direction R by the
tension gauge under the loading condition until the
output voltage reaches 3.8V (Play position).
3. Adjust the Tension Regulator Spring Adjust Screw
while keeping the voltage 3.8V so that the
measured value by the Torque gauge is within the
specification. (Refer to the figure below.)
Figure 1-8-1
VFK1588
(PLAY Position Fixture)
R
Tension Tight
Tension Regulator Spring
Adjust Screw
Tension Loose
Tension Post