JVC TD-WS305TN A User Manual

)-W304BK/-W305TN.
Asa/ore/oisiu
4.
Electrical
circuit
adjustment
procedure
Perform
the
tape
transport
checks
and
head
azimuth
adjustment
before
following
checks
and
adjustments.
Adjustment
should
be
performed
in
the
order
of
alignment
steps.
In
the
steps
marked
with
an
asterisk
(
*
),
adjustment
should
be
performed
after
replacing
the
heads.
Perform
this
adjustment
with
the
NR
switch
set
to
OFF.
Check and Adjustment
Checking
|
;
Input
signal
(Frequency,
level)
Output
raise
value,
deviation
value
DOLBY
Signal
input:
LINE
IN
1
kHz,
Cal.
—40
dB
|
+5.7
dB
+
2dB
circuit
4
5
DOLBY
B
(Rec
mode)
me
enel:
ae
(Rec)
5
kHz,
Cal.
-20
dB
+3.5
dB
+
1.5
dB
(BIAS
-
CUT)
;
1
kHz,
Cal.
“OdB
+05
dB
Output
terminal:
NR.
—1i
TP
1
kHz,
Cal.
—40
dB
+16.2
dB
*3
dB
DOLBY
C
ICAO1
@1)
&
@2
aes
5
kHz,
Cal. —20
dB
+2.9
dB
+
2.5
dB
TkHz,Cal.
0dB+1dB
; Adjusting ~ Standard
Se
Playback
Play
back
VTT724,
then
confirm
|
Deck
—8
dBs
+
0.5dB|
When
the
head
is
replaced,
adjust
level
adjust-
|
that
the
level
at
LINE
OUT
is
L:
VR101
|
playback
gain
level.
ment
—8dBs
+0.5
dB.
R:
VR201
Adjust
VR101,
VR201
and
VR103,
|
Deck
VR203
so
that
LINE
OUT
level
be-
L:VR103
comes
—8
dBs.
-
R:
VR203
Headphone
output:
—24
+
2
dBs
*3
|
Playback
Play
back
TMT735
test
tape,
and
|
Deck
0.5+0.5
dB
frequency
adjust
VR102,
VR202
(deck
BI)
L:
VR102
“response
and
VR104,
VR204
(deck"[A})
so
R
:
VR202
adjustment
|
that
deviation
of
12.5
kHz
to that
|
Deck
of
1
kHz
is
0.5
+
0.5
dB.
L:
VR104
Then, play back VTT739 test tape R : VR204
to confirm that deviation of 63 Hz
to 1kHzis +2 £3 dB.
Connect a frequency counter to the
body of C825 and adjust L801 so
that the counter reads 95 kHz.
Bias
frequency
adjustment
Deck 95 kHz + 1 kHz
L801
7
This step must be performed after
_ Slave
oscillation
the
bias
frequency
adjustment.
L-ch:
LB301
(HX
PRO)
|
Load
a
metal
tape
and
set
the
deck
|
R-ch:
LB401
adjustment
|
to
the
recording
mode.
Adjust LB301 and LB401 to mini-
mize respective voltages of both
sides of RB303 and RB403.
10 (No. 4325-1)

JVC TD-WS305TN A Specifications

General

Brand	JVC
Model	TD-WS305TN A
Category	Cassette Player
Language	English