Denon AVR-3803S Service Manual

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20
ADJUSTING AND CHECKING THE
ELECTRICAL SECTION
® Caution on adjusting
(1) Before adjusting, clean the head surface, capstan and the
pinch roller with a gauze or a cotton swab moistened with
alcohol. :
(2). Demagnetize the R/P HEAD and the E. HEAD with a head
eraser.
(3) Completely demagnetize the adjustment screwdriver.
(4) Unless instructed otherwise, set the’ various controls as fol-
lows.
© INPUT volume ............00..0.00.. cece eee maximum
© DOLBY NR switch..... 2.0. OFF
© BIAS FINE volume................. Center click position
© BALANCE volume................. Center click position
1. Tape Transport Check
Load
the
transport
check
cassette.
In
the
operational
mode,
illu-
minate
the
fixing
guides
of
the
R/P
HEAD
with
a
lamp
and
check
to
make
sure
the
tape
edge
does
not
come
in
contact
with
the
tape
guide
section.
The
tape
transport
is
the
most
important
element
in
determining
the
performance
of
a cassette
deck.
Avoid
moving
the
various
adjustment
screws,
nuts,
etc.,
as
much
as
possible.
Refer
to
the
pages
on
‘Adjusting
and
Checking
the
Mechanism
Section”
when
replacing
or
adjusting
the
R/P
HEAD.
2. Adjusting the Azimuth
(1)
After
completing
the
tape
transport
check,
load
the
test
tape
(A-BEX
TCC-153).
Fig.
2-1
(2) Playback (both FWD side and REV side) the test tape: adjust
the
azimuth
screw
so
that
section
A
of
the
resurge
wave
form is maximum and section Bis minimum. Fig. 2-2
EQUIPMENT FOR ADJUSTING
AND CHECKING
1)
MEASURING
TAPE
........
TYPE
NAME,
BRAND
AND
USES
TYPE
NAME
BRAND
USES
TW-2111A/2121A
SONY
Checking
the
Take-up
Torque
and
Back
Tension.
TY-2231
SONY
=
Checking
the
FF
and
REW
Torque.
HD-7£/60
DENON
Checking
the
FF
and
REW
Times.
TCC-153 A-BEX Adjusting the Azimuth.
TY-224
SONY
Checking
and
Adjusting
the
Tape
Speed
TCC-130 A-BEX Adjusting the Playback Level.
TCC-162/262B
A-BEX
Checking
the
Playback
Frequency
Response.
TCC-902
A-BEX
Transport
checking
cassette
tape.
(2) MEASURING INSTRUMENT
Tension gauge
Audio signal generator
Variable resistance attenuator
Electronic voltmeter
Oscilloscope
Frequency counter
Adjustment screwdriver
Trap coil adjustment square stick
OSCILLOSCOPE
Fig. 2-1
RESURGE WAVE
Fig. 2-2

Denon AVR-3803S Specifications

General

Brand	Denon
Model	AVR-3803S
Category	Tape Deck
Language	English