Panasonic AJ-YA120AG, Service Manual

Page: 272 / 647

MECH-2
1-2. Post Height Pre-Adjustment
MODE
EJECT (POWER OFF)
TOOL
VFK1586 (Mech. Neutral Plate)
VFK1154 (Post Height Fixture)
VFK1149B (post Driver)
1. Confirm that the Reel Table is positioned for
M-Cassette and turn the power OFF.
Remove the Front Loading Unit and install the
Mech. Neutral Plate (VFK1586).
If the Reel Table position is not for M-Cassette,
insert an M-Cassette and eject it so that the
position is for M-Cassette.
2. Put the Post Height Fixture (VFK1154) on the
Mech. Neutral Plate, and adjust the Upper Limit
and Lower Limit as shown in figure 1-2-1.
3. Adjust the S3 and T5 Post Height to the lower limit
under the loading condition.
4. Adjust the S4 and T6 Post Height to the lower limit,
and turn them 1/4 rotation clockwise in order to
realize ‘Lower limit – 0.05mm’. (1 turn = 0.2mm)
Post Name Limit
S3 Post Lower Limit
S4 Post Lower Limit - 0.05mm
T5 Post Lower Limit
T6 Post Lower Limit -0.05mm
Figure 1-2-1
Note:
See page MECH-1 for post locations.
1-3. Photo Sensor Voltage Adj.
TP
T-side: TP2 (A_PROC Board: Slot 2)
S-side: TP1 (A_PROC Board: Slot 2)
ADJ.
T- side: VR400 (Mech. I/F Board)
S- side: VR401 (Mech. I/F Board)
MODE
STOP
TAPE
VFK1423
(Tape BEG./END Detect Adjustment Cassette)
SPEC.
2.2V ± 0.6V
1.
Connect the oscilloscope to TP2 or TP1.on the
A_PROC Board and then i
nsert the VFK1423
(Tape
Beg. /End Detect Adjustment Cassette).
2.
Adjust VR400 on the
Mech I/F Board
so that the
voltage at
TP2 (T-side) is in the specification and
VR401 on the Mech I/F Board so that the voltage
is in the specification.
Figure 1-3-1
1-4. Tension Adj. Flow Chart
Figure 1-4-1
1-5. Offset Voltage Adjustment
START
1-6. Neutral Position Adjustment
1-7. PLAY Voltage Adjustment
1-8. Tension Regulator Spring Adj.
1-9. REV Tension Confirmation
END
NG
OK
VFK1586
LOWER LIMIT
0V
This portion should be disregarded.
V