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TC-K333ESA/K990ES
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denaturedalcohol—moist-
ened swab:
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback and erase head with a
head demagnetizer.
3. Do not
use a magnetized screwdriver for the adjust-
ments.
4. After the adjustments, apply suitable locking compound
to the parts adjusted.
5. The adjustments should be performed with the rated
power supply voltage unless otherwise noted.
capstan
tape guide (S)
pinch roller (T)
pinch roller (§}
erase head
REC/PB head
Tape Path Adjustment
*Refer to Adjustment Position on page 12.
Note:When
using the adjustment methods
for other than
replacement reasons, please do not tamper unnecessary
with the adjustment screws or the erasehead because
either the supply
pinch
roller guide
or the re-
cord/playback head will be made the standard tape
paths. Moreover, when it is necessary to adjust and
replace two or more of any of the heads and/or pinch
rollers, replace them one by one, completely taking out
first tape path, and then replacing second one.
Preparation:
1. Mirror cassette CQO09C 8-909-—708-01
(or CQ012C 8-909-—708-—02)
If one dose not have this, cut out the sections of a 120
—minute
cassette shell as indicated below and use that
cassette.
2. Phillips screwdriver (medium-size):
For the head adjustment screws
Blade —type screwdriver (large-size):
For the supply pinch roller adjustment screws
3. Pen light
4. WS-48B(3 kHz, 0 dB)
5. P-4~A100(10kHz, -10dB)
Definition of Terms: The figures are of a record/playback
head.
Height
Declination
Depth
Adjustment method:
Note: Only perform this adjustment when the supply pinch
roller is to be replaced.
1. Insert the mirror cassette and put the unit in record/play-
back mode.
2. Check
to see whether
the tape is curling at the re-
cord/playback head guide or the pinch roller guide.
If it is curling, remove the curl by adjusting the ® tape curl
adjustment screw. Then, check that the tape is running past
the middle of the erasehead.
Record/playback Head
Note: Only perform this adjustment when the record/play-
back head is to be replaced.
1. Insert the mirror cassette and put the unit in record/play-
back mode.
2. (Height Adjustment)Check to see if the tape is curling at
the tape guide of the head. If it is curling, tighten screws @ ,
, and @,
respectively by the same angle, moving the
head so that it remains at the same angle throughout the
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