Sony HDV HVR-A1U, Руководство по обслуживанию

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6-108
HVR-A1J/A1U/A1N/A1E/A1P/A1C
3-2. TG2/TG4 Guide Coarse Adjustment
1) Play back the tracking standard (XH 2-1) (Ref. No. J-13).
2) Adjust the TG2 and TG4 guides until the RF envelope waveform
becomes flat. (Refer to Fig. 6-2-11.)
3-3. FWD Back Tension Adjustment
1) Set the mini DV torque cassette (Ref. No. J-23) and establish
the FWD mode.
2) Confirm that the S side torque cassette reading value is in the
range as shown below.
0.29 to 0.39 mN•m (3.0 to 4.0 gf•cm)
If the measurement value does not satisfy the specifications,
perform the following adjustment.
• If the measurement value is higher than the specification:
(Decreases the spring tension)
Move the tension coil spring hook to another spring stay in
the direction of
B
.
• If the measurement value is lower than the specification:
(Increases the spring tension)
Move the tension coil spring hook to another spring stay in
the direction of
A
.
3-4. TG2/TG4 Guide Fine Adjustment
1) Play back the tracking standard (XH 2-1) (Ref. No. J-13).
2) Adjust the TG2 so that the RF envelope has the larger amplitude
at the entrance side first, than adjust TG2 guide for flat
amplitude. (Refer to Fig. 6-2-11.)
3) Adjust the TG4 so that the RF envelope has the larger amplitude
at the exit side first, than adjust TG4 guide for flat amplitude.
(Refer to Fig. 6-2-12.)
Fig. 6-2-9
Fig. 6-2-11
Fig. 6-2-12
Fig. 6-2-10
TG2 guide,
Adjustment nut
TG4 guide,
Adjustment nut
TG6 guide
TG5 guide
TG4 guide
TG3 guide
TG2 guide
TG1 guide
Pinch roller
Drum
A
B
LS chassis ass'y
Tension regulator spring
Tenshion regulator
ass'y (TG1 guide)
Entrance side Exit side
Entrance side Exit side