Tension Sensor Voltage Adjustment (1); Tension Sensor Voltage Adjustment (2) - Panasonic AJ-SD93P/E Service Manual

3-3. Tension Sensor Voltage
Adjustment (1)
SPEC. 2.5V ± 0.05V
TEST POINT TP201 (SERVO)
ADJ. VR1 (OFFSET) on the Mech. I/F board
MODE EJECT
TOOL Digital voltmeter
1. Connect the Digital voltmeter to TP201.
2. Adjust the VR1 on the Mech. I/F board so that the
DC voltage is in the specification.
Mech. I/F
Board
S Brake
Solenoid
VR2
GAIN
Mechanical
VR1 Chassis
OFFSET
Figure 3-3-1
3-4. Tension Sensor Voltage
Adjustment (2)
SPEC. Neutral position : 2.5V ± 0.1V
PLAY position : 3.8V ± 0.05V
TEST POINT TP201 (SERVO)
ADJ. Sensor Position, VR2 (GAIN)
MODE EJECT
TOOL Digital voltmeter,
VFK1208
(Neutral Position Tool, Black with hole)
VFK1156 (PLAY Position Tool, Black)
NOTE:
Do not use magnetized
screwdriver.
Do not touch the magnetize screwdriver to S-Reel
FG magnet portion, while adjusting the lever (D)
portion.
<Preparation>
1. Disconnect the connector P3 on the Carriage
Board of the Front Loading Unit.
2. Unscrew the 6 screws and remove the Top Plate
on the Front Loading Unit as shown in figure
3-4-1.
3. Connect the Flexible cable to P3 on the Carriage
Board of Front Loading Unit.
S Reel
tweezers and
MECH-4
<Adjustment Procedure>
1. Open the SERVICE MENU.
2. Select the A00: SERVO ADJUST and press the
"SET" button to open the SERVO ADJUST
MENU.
3. Select the A09 TENSION.
4. Install the VFK1208 (black with hole) as shown in
figure.
5. Connect the Digital voltmeter to TP201.
6. Rotate JOG dial clockwise pushing Search button
so that the mechanism shift to Loading mode.
("on" mark is displayed on A09 : TENSION)
7. Confirm the DC voltage at TP201 is 2.5V ± 0.1V
(Neutral position). If it is not, adjust the sensor
position as follows.
Loosen the screw (A) and move the lever (D) with
tweezers. After adjusting, rotate JOG dial counter
clockwise pushing Search button to set the
unloading position.
8. Remove the VFK1208 (black with hole), and
install the VFK1156 (Black) as same way as
VFK1208.
9. Rotate JOG dial clockwise pushing Search
bottom so that the mechanism shift to Loading
mode. ("on" mark is displayed on A09 :
TENSION)
10. Adjust the VR2 (GAIN) on the Mech. I/F board so
that the DC voltage at TP201 is 3.8V ± 0.05V
(PLAY position).
SCREW
Figure 3-4-1
VFK1156 (Black)
Play Position Tool
VFK1208 (Black with hole)
Neutral Position Tool
A
Figure 3-4-2
P3
SCREW
TOP PLATE
Touch surface
TENSION
POST
TENSION
REGULATOR
P.C.BOARD
D