Head Base Stroke Adjustment - Nakamichi 480Z Service Manual

4.4,
Head Base Stroke Adjustment
Refer to Fig. 4.7.
Note: Before you conduct "Head Base Stroke Adjust-
(1)
(2)
(3)
(4)
ment", adjust with a "Tilt Check Gauge'' to insure
freedom from tilt on the record/playback head.
Load a Stroke Check Gauge M-9038 (DA09038A) in
the N-480Z.
Set the N-480Z in Play mode.
Check to insure whether the "P" pointer on the
Stroke Indicator locates between 2 lines as marked on
the Stroke Check Plate.
If the record/playback head stroke is noted to be mis-
aligned, adjustment can be made by moving the
stroke adjuster assembled in the head base assembly
(either forwardly or backwardly),
4.5. Tape Guides Adjustment and Erase Head Stroke
Adjustment
Remove Head Mount Base Ass'y referring to item 2.22.
Refer to Figs. 4.8 and 4.9.
(1)
(a)
(b)
(c)
(d)
(e)
(2)
(a)
(b)
(c)
(d)
(e)
Supply Tape Guide Height Adjustment
Load an EH Stroke Check Gauge M-9051 (DAO-
9051A) in the N-480Z.
Set the N-480Z in Play mode.
Slide the Supply Tape Guide Check Bar down against
the supply tape guide, thus check can be made on
supply tape guide height.
If the supply tape guide is misaligned, the Supply
Tape Guide Check Bar will not come into the supply
tape guide. If such is noted, turn to adjust the height
adjustment nut A till the Supply Tape Guide Check
Bar is accepted by the supply tape guide.
If the above are insured, set the N-480Z in Pause
mode, then in Play mode to see whether adjustments
are appropriately made. If not, (b) through (e) will
have to be repeated till satisfactory results are ob-
tained.
Take-up Tape Guide Height Adjustment
Load an EH Stroke Check Gauge M-9051 (DAO-
9051A) in the N-4802Z.
Set the N-480Z in Play mode.
Slide the Take-up Tape Guide Check Bar down
against the take-up tape guide, thus check can be
made on take-up tape guide height.
If the take-up tape guide is misaligned, the Take-up
Tape Guide Check Bar will not come into the take-up
tape guide. If such is noted, turn to adjust the height
adjustment nut C till the Take-up Tape Guide Check
Bar is accepted by the take-up tape guide.
If the above are insured, set the N-480Z in Pause
mode, then in Play mode to see whether adjustments
are appropriately made. If not, (b) through (e) will
have to be repeated till satisfactory results are ob-
tained.
aL
Play Mode
(3)
(a)
(b)
(c)
(d)
Fig. 4.7
Erase Head Stroke Adjustment
Load an EH Stroke Check Gauge M-9051 (DAO-
9051A) in the N-480Z.
Set the N-480Z in Play mode, thus check can be
made on erase head stroke through the EH Stroke
Indicator.
Check to insure whether the erase head surface is
aligned with red line on the EH Stroke Indicator. If
not, adjust the erase head stroke by loosening 2
screws B that assemble erase head and erase head
plate.
After completion of adjustment, 2 pcs. of screws
shall be locked with lock tight paint.
Supply Tape Guide Check Bar
Fig. 4.8
Take-up Tape Guide Check Bar
EH Stroke Indicator