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WM-AF22/AF28/BF22/BF28 |
SECTION
2
—.
MECHANICAL AND ELECTRICAL ADJUSTMENTS
MECHANICAL
ADJUSTMENTS
PRECAUTION
1, Clean the following
parts
with
a denatured—alcohol—
moistened
swab :
playback
head
capstan
idlers
rubber
belts
3
2. Demagnetize
the playback
head
with
a head demagne—
pinch
roller
tizer,
3. Do not use a magnetized
screwdriver
for the adjustments,
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,
|
Torque
Measurement
(0.31—0,.6302 + inch)
|
,
1—2.5g > cm
Tape
Tension
Measurement
c
CQ-403A
more
than 90g (1.260z)
Fast Forwand
55— 150g - cm
ELECTRICAL
ADJUSTMENTS
CASSETTE
SECTION
Playback
Head
Phase
Check
Note :When
replacing the head, check the both L-ch and R-ch
phases,
|
7
Procedure
:
Phase
Check
Mode : playback
test tape
:
P-4-A063
L-CH
(6.3kHz, —10dB)
180
oscilloscope
fn
i
headphones
jack
(earphones)
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