Teac X-10 - 3-3 RECORDING PERFORMANCE; 13. RECORD HEAD AZIMUTH; 15. RECORD LEVEL; 16. DISTORTION

X-10R/X-10 |
3-3
RECORDING
PERFORMANCE
TEAC
test
tape:
YTT-8013:
For
recording
alignment
(blank)
MODE/ SIGNAL ADJUST
ITE
CONNECTION
OUTPUT
AC voltmeter
12-1|between BIAS Rec-pause mode L303/L304 Min. reading Bias freq.:
TRAP
TP
&
GND
100
kHz
+5
kHz
Rec-pause mode Min. reading
12.
Bias
trap
|12-2|Fig.
3-1
MONITOR
sw.—
L301/L302
(—45
dB
or
more
TAPE
(4.36
mV
or
less))
OUTPUT cont.—
CAL i
Check VU: no deflection
Do for both FWD
& REV heads
MONITOR sw.—
TAPE
Azimuth adj. Phase: ‘
screw/s of head | within 45 on
(Fig. 2-17) oscilloscope
(Fig. 3-3 )
10 kHz/-—-32 dB
(19.5 mV)
13. Record
head
azimuth
FWD & REV
Test tape:
YTT-8013
SPEED sw.—LOW
REC BIAS sw.—1
REC EQ sw.-1
MONITOR sw.—
TAPE
C301/C302 Over-bias value
(FWD) 3.5 dB +0.5 dB
C303/C304 (from peak)
(REV)
14. Record
bias
(position
1)
7 kHz/—22 dB
(61.5 mV)
Simultaneous monitoring
Same as above 400 Hz/—12 dB | R429/R430
SPEED
sw.—
(195
mV)
(FWD)
Spec.
REC
condition
HIGH
R431/R432
(REV)
—5 dB (436 mV)
16.
Distortion
Fig.
3-1
FWD
&REV
1
kHz/—12
dB
Spec. REC (195 mV) Check 0.8% or less
condition
FWD & REV 1 kHz/—12 dB HIGH:
17.
Signal
to
Fig.
3-1
Spec.
REC
(195
mv)
48
dB
min.
ratio
{Ratio
of
spec.
—5
dB
and
noise
ratio
condition
then
Check
LOW:
noise
SPEED— No signal 46 dB min. ratio
HIGH & LOW
FWD & REV
Spec. REC
1 kHz/—2 dB OUTPUT:
—63 dB or more
-Reference output level:
+5 dB
efficiency
condition
(436
uV
or
less)
|-The
worst
value
should
SPEED
sw.—
(68
dB
min.
be
within
spec.
HIGH
ratio)
L305/L306
OUTPUT:
~—60 dB or more
-Reference output level:
+5 dB
19. REC
FWD & REV
MUTE
Ss
(1.38
mV
or
less)
:
pec.
REC
‘
ss)
|
|
function
1
kHz
filter
condition
(65
dB
min.
ince,
should
ratio)
rec-mute mode
FWD &
REV
40
Hz~16
kHz/
|
(FWD)
40
Hz~16
kHz
20.
Frequency]
20-1|Fig.
3-1
Spec,
—32
dB
L307/L308
Reference:
400
Hz
REC
response
condition
40
Hz~20
kHz/
|
Check
40
Hz~20kHz
+3 dB
12