Sony TC-K222ESG - Page 9

| TC-K222ESG/K850ES
(Preliminary Azimuth Adjustment) 3. (Height adjustment) Turn screws ®,@, and @ all
After demagnetizing and cleaning the adjustment by the same angle so that the portions of the
head, play back WS-48B (3 kHz, 0 dB). erasehead visible at top and bottom are nearly
Turn screw @ so that the reading on the level of equal width. If the width at the top is greater,
meter of the unit or that of the level meter tighten the screws; if the width at the bottom
connected to LINE OUT is maximized. is greater, loosen the screws.
If the screw . turned at least half a revolution, Erasehead (The erasehead as seen through the
repeat the adjustments from step 1. :
mirror cassette.)
6. (Tape Path Check) Connect the oscilloscope to
LINE OUT and play back P-4-A100 (10 kHz, -10 a a
dB) to display a resurge waveform. After 20
seconds of record/playback (after the tension
within the loop has been increased sufficiently),
make sure the variation in the resurge is within
+ 90 degrees (within + 45 degrees is desired).
If the variation is greater than this, it is because
the declination and/or the height adjustment is A,
not perfect. Repeat the adjustments from step 1.
Tape —»
Se ee aes
Make these the same width.
(Declination Adjustment) Leaving it in the
playback position, put the back tension to 0 and
make certain the erasehead part and supply pinch
roller guide part do not shift. If there is a shift,
turn the screw ® and change the declination.
Looking at it using the mirror cassette, if the
tape shifts up, tighten the screw, and if it shifts
down, loosen the screw.
5. Repeat the adjustments beginning with step 2 and
fine adjust the height and declination. And make
sure the tape does not curl up on the pinch roller
guide or the guide part of the record/ playback
head.
6. (Depth Adjustment) In order to make the entire
head play the tape smoothly, and to make sure
the depth of the erasehead is neither too shallow
nor too deep, loosen screw @ a bit.
test tape
P-4-100S :
(10 kHz, —10 dB) Oscilloscope
L-CH 47kQ
UNE CUT
Oscilloscope Resurge Waveform
OOAO®VO®
In Phase 45° eee ee, 180°
eer he
Good Bad,
a Gal 0.56 mm
Note:
Only
perform
this
adjustment
when
the
Normal
TO
erasehead is to be replaced. i
head
1. Insert the mirror cassette and put the unit in
record/ playback mode. |
2.
(Azimuth
Adjustment)
Adjust
the
azimuth
of
the
Not
deep
enough
Too
deep
erasehead by adjusting screws @ and @ so that
the tape runs as evenly as possible.
pay be — |
Check to make sure that there are no curls or
shifts throughout the whole tape path and that
the tape runs smoothly.
2. Reapply the locking compound to the adjusted
e : ; screws. (The locking compound should only be
Normal Tighten @ Tighten @ applied to screw © after the azimuth has been
Loosen @ Loosen @ adjusted.)
(The erasehead as seen when erasing the mirror
cassette.)