Adjustment Of The Rev. Tension Sensor Position; Adjustment Of The Fg Head Gap - Panasonic AG-7350 Series Service Manual

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4-3-6. ADJUSTMENT OF THE REV.
TENSION SENSOR POSITION
<<TOOL>>
Tension Sensor Adj. Fixture ; VFK0578
Tension Post Adj. Plate ; VFK0236
Fine Adj. Screwdriver ; VFK0330
Digital Volt Meter ; Purchase locally
<<NOTE>>
Assemble a Tension Sensor Adjustment Fixture (VFK0578) and
a Tension Post Adj Plate (VFK0236) as shown in Figure M41.
Tension Sensor Adj. Fixture (VFK0578)
Tension Post Adj. Plate (VFK0236)
Figure M41
1. Remove the Top Plate and Cassette Holder Unit. (refer
to Disassemble Procedures)
<<NOTE>>
Do not disconnect 4Pin (exept 2P) flat wire from connector
P1508 on the right side of Cassette Compartment.
2. Push the Sub Wiper Arm (R) to direction of Cassette
loading.
Then the Sub Wiper Arm (R) goes down itsedlf and
mode of machine change to STOP.
3. Turn the Power switch off.
4. Remove the Cassette Compartment (refer to Dis-
assmbly Procedures) and disconnect 4Pin flat wire form
P1508.
5. Connect the V.T.V.M. or D.V.M. to TP2502 on the Reel
Servo C.B.A.
7. Place the Tension Post Position Adjustment Plate with
the Fixture over the reel tables as shown in Figure M42.
Figure M42
4-14
8. Turn the Power switch on.
9. Slightly loosen 2 screws (C). Insert a Fine Adj. Screw-
driver In the hold (D). (Figure M43)
~(D)
I
Tension Spring
Screw
(C)
Figure M43
10. Adjust the Rev Sensor Position so that measurement
becomes D.C. 2.0V to 2.5V.
11. Remove the Tension Sensor Fixture .
12. Reinstall the Cassette Compartment.
13. Confirm Playback picture (Rev Playback mode, Play-
back mode etc.)
4-3-7. ADJUSTMENT OF THE FG HEAD
GAP
<<SPEC>>
0.17mm to 0.18mm
1 . Slightly loosen 2 screws. (Figure M44)
2. Put the paper which is used for cover page of this vol-
ume into the gap between F.G. Head and Capstan rotor.
(The thickness of the cover page Is approx. 0.17mm).
3. After adjustment, tighten 2 screws.
Screws
Gap: 0.17mm-0.18mm
Figure M44
<<NOTE>>
Do not touch the surface of rotor and keep any magnetizable
material away.