JVC TD-X102 User Manual

KD-X1 A/B/C/E/G/J/U |
Main Adjustment
[1]
Equipment
and
measuring
instruments
used
for
5)
Reference
tapes
for
playback
(JVC
Test
Tape)
adjustment
VTT703 LL
(for
head
azimuth
adj.)
VTT712
(for
motor
speed,
wow
flutter
adj.)
1.
Electrical
adjustment
V11739
(for
playback
frequency
response}
1)
Electronic
voltmeter
6)
Resistor
600
22
(for
attenuator
matching)
2)
Audio
frequency
oscillator
(range:
30—20
kHz
and
output
0
dB
with
impedance
600
22)
2.
Mechanical
adjustment
3) Attenuator
1)
Torque
testing
cassette
gauge,
CTG-N.
4) Standard tapes for REC/PB
Maxell UD — Norom (SF) tape. . .
TDK SA —Chrome (SA) tape... . — or equivalent
JVC ME — Metal tape.........
[11] Mechanical adjustment
(Adjust the mechanism or confirm that it is in normal operating condition prior to the adjustment of the electrical circuit.)
Item Adjustment Adjusting | Standard Remarks |
point value
Adjusting 1. Connect an electronic voltmeter to Screw (A) Maximum} If the head is worn, disconnected or
record/play back the LINE OUT terminals. exceedingly magnetized so as not to
. Play back the VTT7O3L test tape.
. Adjust the head angle with the
screw @) until the reading of the
electronic voltmeter becomes maxi-
mum for both channels.
4. After adjusting, set the screw with
screw bond.
head position provide the necessary characteristics,
replace it with a new one.
After replacement, the head position
adjustment as well as the playback
level adjustment, the bias current ad-
justment and the recording level ad-
justment are all necessary.
If the output difference between the
left and right channels exceeds 3 —
4 dB, the head is defective. Replace it
with a new one.
WR
Adjustment erase
head height
. Turn the adjusting screw for align-
ing the erase head until it stops.
Then, turn the screw in the reverse
direction by 180° {a % revolution).
2. Employ a special cassette (C-120)
from which parts of the casing,
where the erase head, record/play-
es @) back head and capstan engage, has
| been cut away. Perform tape trans-
© 0) port with the cassette tape. Adjust
the screw until the tape runs in
| the center of the erase head tape
Be sure to perform this adjustment
after replacing the erase head.
Correct Incorrect
4 Tape guide
- Tape guide ~Tape
ae
Tape guide
[=
Semi- 3000 Hz | If the speed meter functions as a wow
fixed and flutter meter, also, connect the
resistor deck to the INPUT terminals of the
in the meter.
motor
guide.
-
Adjusting motor | Connect a speed meter (an electronic
speed counter) to the LINE OUT terminals.
Play back the VTT712 test tape.
Adjust the semi-fixed resistor in the
motor until the reading of the speed
meter is 3000 Hz.
-
4
+
+
+~
SS
Checking
wow
Connect
a
wow
and
flutter
meter
to
0.08%
If
the
reading
becomes
moving
value
and
flutter
LINE
OUT
terminals.
(WRMS)
|
even
if
conforming
to
the
standard,
a
Play
back
the
VTT712
test
tape.
0.2%
re-claim
may
be
raised.
Repaits
are
‘lps
to
see
if
the
reading
of
the
(DIN45500)
|
necessary.
meter
is
within
0.08%
(WRMS).
|
T
Checking
play-
Employ
a
torque
testing
cassette
tape
40-70
If
the
standard
torque
is
not
obtained,
back
torque
for
the
checking,
or
remove
the
cas-
gr-cm
replace
the
take-up
disc
assembly.
| sete
cover
and
use
a
torque
gauge.
ee
6 (No. 4243)

JVC TD-X102 Specifications

General

Brand	JVC
Model	TD-X102
Category	Cassette Player
Language	English