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HEAD AZIMUTH
ADJUSTMENT
(DECK 1/2)
1. Playback the azimuth adjustment portion (8kHz, —20dB)
of the test tape (QZZCFM).
Vary the azimuth adjusting
screw
until
the outputs
of the
L-CH
and
R-CH
are
maximized
and the lissajous
waveform,
as illustrated,
approaches 0 degrees.
Note: If L-CH and R-CH are not maximized at the same point,
adjust to the point where the levels of each channel
are maximized and equal.
2. Perform the same adjustment in the play mode.
3. After the adjustment,
apply screwlock
to the azimuth
adjusting screw.
TAPE SPEED ADJUSTMENT
(DECK 1/2)
Normal speed
1. Shift the edit-recording tape-speed selector to "X1".
2. Playback the middle portion of the test tape (QZZCWAT).
3. Adjust Deck 1=VR902
and Deck 2=VR903 so that the
output is within the standard value.
High speed
4. Shift the edit-recording tape speed switch to "X2".
5. Playback the middle portion of the test tape (QZZCWAT).
6. Adjust Deck 1=VR901
so that the output is within the
standard value.
Note: The Normal speed adjustment must be done before
the High speed adjustment.
E.HEAD
R/P. HEAD
Azimuth Screw
Azimuth Screw
Azimuth Screw
(Forward)
(Reverse)
{DECK 2)
(DECK 1)
Fig. 2
LINE OUT
Digital frequency
counter
(DECK 2)Standard value: 3000 + 15 Hz [Normal (X1)], 6000 + 600 Hz [High (X2), only confirmation]
(DECK 1)Standard value: 3000 + 15 Hz [Normal (X1)], 6000 + 30 Hz [High (X2)]
PLAYBACK
GAIN ADJUSTMENT
(DECK 1/2)
1. Playback the gain adjusted portion (315Hz, 0dB) of the
test tape (QZZCFM).
2. Adjust
Deck
1= VR3
(L-CH)
[[VR4 (R-CH)]]
and
Deck
2 =VR5 (L-CH) [[VR6 (R-CH)]] so that the output is within
the standard value.
Standard value: 0.4V+0.5dB
PLAYBACK
FREQUENCY
RESPONSE
(DECK 1/2)
1. Playback
the
frequency
response
portion
(315Hz,
12.5kHz~63Hz,
—20dB) of the test tape (QZZCFM).
2. Assure that the frequency response
is within the range
shown in Fig. 6 for both L-CH and R-CH.
LINE OUT
LINE OUT
4-4
+508
|_|+3B
+208
ae
048
:
;
—20B
4
--+}-|—34B
1
q
:
HE —54B
T
T
Littl
63Hz 100Hz 200Hz
[s00Hz
1kHz
2kHz2
4kHz
12.5kHz
315Hz
8kHz
Fig. 6
RS-X101
ERASE CURRENT
ADJUSTMENT
(DECK 2)
1. Insert the Metal blank test tape (QZZCRZ) and set the unit
to the Record Pause mode.
2. Adjust VR301 so that the output between
TP3
and GND
ERASE HEAD
EVM
is within the standard value.
.
R301 10
(Electronic
Standard value: 190+5mA (Metal)...EVM Reading: 190+5mV
Fig. 7
Voltmeter)
OVERALL
FREQUENCY
RESPONSE
(DECK 2)
Normal Overall frequency response chart (NR OUT)
1. Insert the Normal blank test tape (QZZCRA) and set the
unit to the Record Pause mode.
2. Apply a reference input signal (1kHz, —24dB) through an
attenuator.
3. Attenuate the signal by 20dB and adjust the frequency
from 50Hz~10kHz.
4. Record the frequency sweep.
5. Playback the recorded signal and assure that it is within
the range shown in Fig. 8 in comparison to the reference
50Hz 100Hz 200Hz
500Hz 1kHz 2kHz
frequency (1kHz).
6. If it is not within the standard range, adjust VR303
Fig. 8
(L-CH) and
VR302 (R-CH) so that the frequency level is
within the standard range.
CrO, Metal Overall frequency response chart (NR OUT)
¢ Level up in high frequency range
Increase the bias current.
¢ Level down in high frequency range ...Decrease the bias current.
7. Repeat steps 2~6 above using the CrO, tape (QZZCRX)
and the Metal tape (QZZCRZ) increasing the frequency
range to 12.5kHz (50Hz~ 12.5 kHz).
8. Assure that the level is within the range shown in Fig. 9.
+6dB
+4dB
+20B
0dB
—20B
—40B8
—6dB)
H
LINE IN
LINE OUT
SOHz
100Hz 200Hz
SOOHz
1kHz
2kHz
EVM Oscilloscope
Fig. 9
OVERALL GAIN ADJUSTMENT
(DECK 2)
. Insert the Normal blank test tape (QZZCRA) and set the
unit to the Record pause mode.
- Apply
a _ reference
input
signal
(1kHz,
-—24dB).
Attenuate the output so that its level becomes 0.4V.
. Record this input signal.
LINE IN
LINE OUT
. Playback the signal recorded in step 3 above, and assure
that the output is within the standard value.
. If it is not within the standard value, adjust VR7 (L-CH)
and VR8 (R-CH).
. Repeat the step 2~5 above until the output is within the
standard value.
Standard value: 0.4V+0.5dB
EVM
Oscitloscooe
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