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i
i
form, as illustrated,
i
is within the standard value.
maximized
and the lissajous wavefo
illu
AeottG
(Electronic
adjust to the point where the levels of each channel
are maximized and equal.
Fig. 1
2. Perform the same adjustment in the play mode.
3. After the adjustment, apply screwlock to the azimuth
E. HEAD (DECK 2) R/P. HEAD (DECK 2)
OVERALL FREQUENCY RESPONSE
(DECK A)
Normal Overall frequency response chart (NR OUT)
adjusting screw.
P. HEAD (DECK 1)
. Insert the Normal blank test tape (QZZCRA) and set the
unit to the Record Pause mode.
. Apply a reference input signal (1kHz, —24dB) through an
attenuator.
. Attenuate the signal by 20dB and adjust the frequency
from 50Hz~10kHz.
Azimuth Screw (Forward)
Azimuth Screw (Reverse)
. Record the frequency sweep.
. Playback the recorded signal and assure that it is within
Fig. 2
the range shown in Fig. 8 in comparison to the reference
50Hz 100Hz 200H2
S00H2 1kHz 2KHz
frequency (1kHz).
. If it is not within the standard range, adjust VR303
Fig. 8
Malden bles ADJUSTMENT
(DECK A/B)
(L-CH) and
VR302 (R-CH) so that the frequency tevel is
:
:
eee
within the standard range.
CrO, Metal Overall frequency
response chart (NR OUT)
1. Shift the edit-recording tape-speed selector to "X1".
* Level up in high frequency range
Increase the bias current.
;
i
Aaa
2. Playback the middle portion of the test tape (QZZCWAT).
¢ Level down in high frequency range ...Decrease the bias current.
3. Adjust Deck B=VA902 and Deck A=VR903 so that the
LINE OUT
:
7. Repeat steps 2~6 above using the CrO, tape (QZZCRX)
standard value.
.
Fig. 9
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).
PLAYBACK GAIN ADJUSTMENT (DECK A/B)
Attenuate the output so that its evel bacemes 0.4V.
1. Playback the gain adjusted portion (315Hz, 0dB) of the
LINE OUT
. Record this input signal.
:
LINE IN
LINE OUT
test tape (QZZCFM).
A
. Playback the signal recorded in step 3 above, and assure
2. Adjust
Deck
B= VR3
(L-CH)
[[VR4 (R-CH)]] and
Deck
q
that the output is within the standard value.
A=VRS5 (L-CH) [[VR6 (R-CH)]} so that the output is within
'
Ss
. If it is not within the standard value, adjust VR7 (L-CH)
the standard value.
and VR& (R-CH).
. Repeat the step 2~5 above until the output is within the
Standard value: 0.4V+0.5dB
standard value.
Standard value: 0.4V+0.5dB
PLAYBACK
FREQUENCY
RESPONSE
(DECK A/B)
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
63Hz 100Hz 200Hz
|500Hz
1kHz
2kHz
4kHz
315Hz
Fig. 6
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