Teac W-370C - Page 8

W-370C/W-375C/W-350/W-355/W-310Cr«1l/W-300m«ll
Oo-4 RECORDING PERFORMANCE
Deck
settings:
TEAC
recording
test
tapes:
DOLBY
NR
sw:
QUT
MIT-5571:
For
METAL
RECORDING
LEVEL
cont.
(L/R):
MTT-5561:
For
Cr02
Specified
position
(item
5)
MIT-5511:
For
NORMAL
ADJUST
MEASUR
ING
|
ITEM
SETTING
INPUT
SIGNAL
(or
CHECK)
POINT:
RESULT
|
REMARKS
Connection:
Fig.
5-5
T.P
L/R
(BIAS)
6.
BIAS
osc.
Tape:
MTT~5511
LINE
IN:
L301
10)
kHz
on
RECORD/PAUSE
mode
No
signal
frequency
counter
Specified
bias frequency
LINE IN:
400
Hz
&
10
kHz
OUTPUT:
7.
Record
bias
|
Tape:
MIT-5511
alternately/
Nearly
equal
level
Repeat
if
the
~42cB
(6.
15mV)
R14/R24
at
both
|
result
is
Record
and
frequencies
unsatisfactory
reproduce
them.
Measure output level
(record playback)
at “-" position then
at "+" position
Variation between
Tape: MIT-5511
BIAS FINE cont:
fully "-" position
8. BIAS FINE
contro! check
W-310Cmk I , W-370C
W-375C only
then fully "+" '-" ond "+
pos
ition
positions:
5 dB or more
OUTPUT:
W-310Cmk I , W-370C,
W-375C:
-7.5cB (327mV)
W-300nk I ’ W-355
10 kHz/-42 dB
—
R13/R23
LINE IN:
400
Hz/-12
dB
W-350:
(195m¥)
-6§.5cB
(367mV)
Record and
reproduce
them.
OUTPUT:
W-310Cmk
I
,
¥-370C,
W-375C:
Check
—7.5dcB+1.5
BB
|
(275mV
to
388mV)
W-300mk
I
,
W-355
|
W-350:
~§.5dB+1.5
oB
(308mV
to
436mV¥)
Tape: MIT-551]
9.Record level
| NR SYSTEM: IN & GUT
LINE IN:
10.Frequency
|
Tape:
MIT-5511
Required
|
If
out
of
spec.
response
Tape:
MTT-5561
frequencies:
Check
Standard:
recheck
#7
Tape:
MIT-5571
-42
dB
(6.
15mV)
Fig.5-8
to
Fig.5-9
Ratio of specified
output level:
+ W-310Cmk I, W-370C
Tape: MIT-5571 LINE IN:
11.Signal-to-
|
Tape:
MIT-5561
IkHz/-9dB
Check
W-375C:
noise
ratio
|
Tape:
MIT-5511
(275mV)
-4.5
dB
:
V
j
W-300mk
I
,
W-350
no
signal
[NORMAL
]
¥-355:
-3.5
cB
to
noise