DV-NC55S/H
DV-NC60H
3 Next, press the tracking button (+), (�) and change
the ATR signal waveform from max to min and fromPB CHROMA
min to max. At this time adjust the height of supplySignal
and take-up side guide roller with the adjustment
driver (JiGDRiVER-4) so that the ATR signal wave-
form changes nearly parallel.
4 If the tape is lifted or sunk from the helical lead
surface, the PB CHROMA signal waveform appearsHead switching pulse
as shown in Figure 8-35.Figure 8-34.
5 Press the tracking button (+), (�) and make sure that
the ATR signal waveform changes nearly parallel.4. A/C head X value adjustment
6 Finally check tape crease near the reverse guide. If1 Tentatively fix A/C head arm screws 1 and 2 by the
tape crease is found, remove it as stated in 8-20method described in 8-18 "Replacement 3".
"HEIGHT ADJUSTMENT OF REVERSE GUIDE"2 Playback the alignment tape VROCPSV, and
item 3.shortcircuit between TP5101 and TP5103. As a
result the auto-tracking is automatically cancelled,
so that the X value adjustment mode is set.
When the tape is above the helical lead.When the tape is below the helical lead.
Supply sideTake-up sideSupply sideTake-up side
Supply side guide rollerTake-up side guide rollerSupply side guide rollerTake-up side guide roller
rotated in clockwiserotated in clockwiserotated in counterclock-rotated in counterclock-
direction (lowers guidedirection (lowers guidewise direction (raiseswise direction (raises
roller) to flattenroller) to flattenguide roller) to make theguide roller) to make the
AdjustmentATR signal.ATR signal.tape float above the helicaltape float above the
lead. The supplyhelical lead. The take-up
side guide roller is thenside guide roller is then
rotated in the clockwiserotated in the clockwise
direction to flatten thedirection to flatten the
ATR signal.ATR signal.
Figure 8-35.
3 Move the A/C head with the X value adjustment gearNotes:
driver by the method shown in Figure 8-33, andWhen the A/C head X value adjustment is performed, be
adjust the A/C head so as to get the maximum sure to perform at first X value rough adjustment (refer to ATR8-
signal waveform. (Note: At this time adjust so as to21, 3-2).
get the maximum ATR signal waveform nearest the
A/C head position which has been set in case of X1
value rough adjustment as stated in 8-21, 3- 2.)2
4 Tighten finally the screws 1 and 2. Be sure to
tighten at first the screw 1 and then the screw 2.
Final tightening torque is 0.6Nám (If the screw 2 is
tightened first, the X value may deviate.)
5 Adjust the playback switching point (Refer to the
Figure 8-36.
electric adjustment method.)
6 Playback the self-picture-recorded tape, and check
the flatness of ATR signal waveform and sound.
31 |
ACEC
