Harman Kardon DC5300 - Advanced Dual Deck Operations; Dual Cassette Play and Record Modes; Continuous Play and Record Setup; Sync Reverse Copying Functionality

ALIGNMENT
PROCEDURES
(REFER
TO
PAGES
11,
12,
23,
24
AND
25)
CASSETTE MECHANISM CONFIRMATION
Make sure to confirm conditons of the cassette mecha-
nism as follows before adjustment.
1. Confirmation of erase prevention function
* The switch should turn ON when a tape with erro-
neous erase preventive pawl is inserted. (Use a
tape which is 0.2 mm smaller than the minimum
size of 62.9 mm or a MAZ-0184-C gauge one.)
When the switch arm is moved back gradually from
the ON position, the switch turn OFF.
2. Confirmation of cassette pack detection function
The switch should turn ON when a tape is inserted.
(Use a tape whose minimum size is 63.5 mm or a
MAZ-0184-C gauge one.)
When the switch arm is moved back gradually from
the ON position, the switch should turn OFF.
.
3. Confirmation of eject function
The cassette compartment opens smoothy and no
abnormal noise should be heard while opening and
closing.
The eject lever opens smoothly without contacting
the chassis and damper.
The eject button can not be pressed during play-
back.
4. Confirmation of playback, fast forward and rewind
functions
The torque used in each of the playback, fast for-
ward and rewind modes should be within specifi-
cation.
Playback \..cc eee 35 gr:cm — 70 gr.cm
Fast Forward.......... 70 gr.cm — 150 gr.cm
REWING oo. eeeeeseeeeeee 70 gr.cm — 150 gr.cm
No abnormal noise should be heard during opera-
tion in any mode. The solenoid switching sound
should not be considered as a noise.
5. Confirmation of positions of record/playback head
and playback head
* Head height
a) Set the M-300 head gauge.
b) Set the unit in the playback mode and place the
adjustment chip on the head gauge as shown in
the Fig. 1. ‘
c) The adjustment chip should not contact the tape
guide of both record/playback head and playback
head.
TAPE GUIDE
CHIP?
HEAD GAUGE
net
r HEAD GAUGE
RECORD/PLAYBACK or PLAYBACK HEAD
HEAD AZIMUTH ADJUSTMENT SCREW
Fig. 1
* Head position
a) Set the M-300 head gauge.
b) Set the unit in the playback mode and place the
adjustment chip on the head gauge as shown in
the Fig. 2.
c) With both record/playback head and playback
head, the adjustment chip should be between MIN
and MAX of the M-300 head gauge.
RECORD/PLAYBACK or PLAYBACK HEAD
Fig. 2
HEAD GAUGE
ELECTRICAL
ADJUSTMENT
AND
CONFIRMATION
1. Before adjustment
*
Before
electrical
adjustment,
make
sure
that
con-
firmations
of
the
cassette
mechanism
are
all
com-
pleted.
*
After
the
power
switch
is
pushed
on,
wait
for
10
minutes
before
measuring
to
be
sure
of
the
most
stable
operation.
* Since head magnetization, dust accumulations, etc.
are likely to introduce errors in the various charac-
teristics,
it
is
very
important
that
the
heads
are
properly demagnetized and cleaned before com-
mencing
any
adjustment,
particularly
frequency
response and head azimuth adjustment.
2. Instruments required
* Low frequency oscillator
* AC VTVM or dual channel AC VITVM
* Oscilloscope
*« Wow/flutter meter
¢ Frequency counter
* Distortion meter
3. Test tapes
¢ Azimuth adjustment ............... MTT-114 or TCC-153
*
Tape
speed
adjustment
....
MTT-111DN
or
TCC-112
*
Playback
output
level
adjustment
.........ccccccsssseseseses
MTT-150 or TCC-130
* Playback frequency characteristic confirmation
seveisvascaeevsaseass
TCC-1216
or
TCC-162C
and
TCC-262C
« Reference tapes
Note:
C-90 differes with C-60 in the thickness and bias is of
unequal, so adjust with the tape whose bias in of
Specified Value.
4.
General
conditions
(unless
otherwise
noted)
Controls and Switches
Dolby NR Off
Input Level Maximum
MPxX Filter Off
Bias Fine Trim Center
Input Balance Center
Azimuth Adjustment
When
the
maximum
level
point
of
R
channel
does
not
equal
that
L
channel,
connect
the
oscilloscope
as
shown
in
Fig.
3
and
proceed
with
azimuth
adjustment
so
that
L and R channels are in phase.
a)
Connect
L
channel
tape
out
to
“X
(or
V)”
and
R
channel
to
“Y
(or
H)”.
Observe
the
lissajouss
wave-
form.
Set
L
and
R
channels
to
monaural.
Adjust
vertical
and
horizontal
gain
so
that
the
waveform
becomes
45 degree.
c)
Adjust
azimuth
so that
the
measurement
of
“a”
becomes
maximum
and
the
measurement
of
”b”
becomes
minimum
against
the
45
degree
line.
b
=
Oscilloscope
!
PLAYBACK
FREQUENCY
CHARACTERISTIC
COPY/PLAYBACK
FREQUENCY
CHARACTERISTIC
TEST TAPE : TCC-162C, TCC-262C
100Hz 315Hz
RECORD/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE : SCC-502, SCC-1360, SCC-565
DOLBY NO : OFF
0
-3dB
100Hz 315Hz 18kHz
Fig. b
TEST TAPE: TCC-262C TO SCC-502
TCC-162C SCC-1360
SCC-565
0
-3dB
100Hz 315Hz 4kHz 15kHz
(TYPE IV)
Fig. c
HI-SPEED COPY/PLAYBACK FREQUENCY CHARACTERISTIC
TEST TAPE: TCC-262C TO SCC-502
TCC-162C SCC-1360
SCC-565
100Hz 315Hz