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SECTION
2
MECHANICAL ADJUSTMENTS
PRECAUTION
1.
Clean
the following
parts
with
a
denatured-alcohol-
moistened
swab:
record/playback
head
pinch
roller
erase
head
rubber
belts
capstan
idlers
Torque
Measurement
CQ-102RC
1.5—7g*¢cm
(0.020 — 0.096 oz « inch)
63 g * cm or more
(0.87 oz « inch or more)
SECTION
3
ELECTRICAL ADJUSTMENTS
1.
Demagnetize
the record/playback
and
erase
head
with
a
head
demagnetizer.
2.
Do not use a magnetized
screwdriver
for the adjustments.
3.
After the adjustments,
apply suitable locking compound
to
the
parts
adjusted.
4,
The
adjustments
should
be
performed
with
the
rated
power
supply
voltage
unless
otherwise
noted.
5.
The
adjustments
should
be performed
in the order given
in this
service
manual.
(As
a general
rule,
playback
circuit
adjustment
should
be completed
before
performing
recording
circuit
adjustment.)
6.
The
adjustments
should
be performed
for both
L-CH
and
R-CH.
e
Switches
and
controls
should
be set
as
follows
unless
otherwise
specified.
DOLBY
NR
switch: OFF
TAPE
select
switch: TYPE
1 (NORMAL)
(DECK-B)
Mode: record —
AF
OSC
6002 jing IN LINE OUT
315Hz
[ipattsel
|
108)
RECORD/PLAYBACK HEAD AZIMUTH
ADJUSTMENT|DECK A/DECK B
Procédure:
1.
Mode:
FWD
playback
test
tape
P-4-A100
(10kHz,
— 10dB)
R-CH
LINE
OUT
2.
Turn the adjustment
screw
and check output peaks. If the
peaks
do
not
match
for
L-CH
and R-CH,
turn
the
adjustment
screw
so
that
outputs
match
within
1 dB
of
peak.
output
level
within
1 dB
L-CH
R-CH
peak
peak
Screen
pattern
—~ screw
position
O@OO®Q®
:
h
45°
é
3
'i
in phase
90
135°
180
good
wrong
3.
After the adjustments,
apply suitable locking compound
to
the
parts
adjusted.
Adjustment
Location:
FWD
REV
rere eran
yoteemenerereemaneensd
Adjustment
screw
TAPE SPEED ADJUSTMENT/|DECK A/DECK B
Procedure:
Mode:
FWD
playback
speed
checker
or
digital
frequency
test
tape
WS-48B
counter
3kHz,
OdB
esaee
47kO
SE walk
LINE
OUT
1.
Connect
pin to with
the lead wire.
(CNP505)
Measurement limit : high speed
Speed checker
Digital trequency conter
0+0.3%
5960 + 20Hz
Frequency
difference
between
the beginning
and the end of
the
tape
should
be within
1.5%
(90Hz).
—
4 —
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