Teac X-1000 - 3-3 Recording Performance Checks; 14. Bias Trap Adjustment; 15. Record Head Azimuth Adjustment; 16. Record Bias Adjustment

X-1000M/X-1000
12
MODE/
INSTRUCTION
ITEM CONNECTION
SIGNAL
SOURCE
ADJUST
(or CHECK)
RESULT
LH and EE
Spec. PB condition
Use fully erased tape
(Use bulk tape eraser)
11. Signal to
noise ratio
TAPE sw-—-LH-I
SPEED—19cm/s
PLAY HEAD sw—4T
(Reset to 2T after-
wards)
. Frequency
response
(4T play-
back head)
[X-1000M]
12-1 | Fig. 3-1
TAPE sw—LH-IT
SPEED—38cm/s
EQ sw—lEC
For EQ switch
location, refer to Fig.
. Frequency
response
(1EC)
[X-1000M]
13-1| Fig. 3-1
YTT-8013
and
YTT-8053
YTT-1003
YTT-1004
Check
IMPORTANT: After completion of step 13-1, set EQ sw as below:
For USA, Canada, Australia and General Export models — NAB position
For Europe and U.K. models — IEC position
between BIAS
TRAP TP (TP1/
TP2) & GND
Rec-pause mode
MONITOR—TAPE
OUTPUT con.—CAL
LH-I, -Il:
38cm/s 50dB
19cm/s 50dB
9.5em/s 49dB
EE:
38cm/s 52dB
19cm/s 52dB
9.5cem/s 52dB
50Hz ~ 14kHz
+7dB
{Ref.: 400Hz)
-Ratio of spec. —5dB to
noise
-Change-over the polarity
of the AC Line plug. The
' worse reading should be
within spec.
Level difference against measured value in
step 8-1 at each frequency point (3) should
be as shown approximately:
63Hz
+2.1dB
10kHz
—2.7dB
20kHz
—3.0dB
TEAC test tape: YTT-8013: For recording alignment (blank) for LH-IL
YTT-8053: For recording alignment (blank) for EE
SIGNAL
SOURCE
15. Record
head
azimuth
MONITOR—TAPE
SPEED—19cm/s
10kHz/—32dB
(19.5mvV)
16. Record 16-1| Fig. 3-1 19cm/s
bias [X-1000M]
or
9.5cm/s
J [X-1000]
MONITOR
TAPE
7kH2z/—22dB
(61.5mV)
ADJUST
(or CHECK)
L303/L304
Azimuth
adj. screw/s
of head
(Fig. 2-14)
R515/R516
RESULT
Min. reading
Min, reading
(4.36mV or
less))
VU: no deflec-
tion
Phase:
within 45° on
oscilloscope
(Fig. 3-3)
Over-bias value
2.5dB +1dB
(3dB +1dB for
X-1000) from
Over-bias value
3dB +1d0B
(4dB +1dB for
X-1000) from
peak
(—45dB or more
REMARKS
Bias freq.:
100kHz +5kHz
-Simultaneous monitoring
-First set adjustor fully
CCW (C) ), then adjust.
Fig. 3-6 EQ switch location (X-1000M only)
+4
+2
to)
-2
~4
(dB)
fe
mn4
+308
0
+
LH-II
2
_.!
—
LYTT-8013
ed
4-463
(dB)
Be
40
400
Tex
22k
(Hz)
YTT-8053
20k
Fig. 3-7 Overall frequency response (9.5cm/s)
race LH-It
yl YT YTT-8013
-3¢1 —3 dB (38 om/s)
. “4-6 dB (190m/s) EE
40 400 "~~". YTT-8053
20k 30k (Hz}
26k
Fig. 3-8 Overall frequency response (38cm/s, 19cm/s)