Technics RS-B555

RS-B555
HEAD AZIMUTH ADJUSTMENT
1.Playback the azimuth adjusment portion (8 kHz, -20 dB)
of the test tape (QZZCFM). Vary the azimuth adjusting
screw until the outputs of the L-CH and R-CH are maxi-
mized and the lissajous waveform, as illustrated, ap-
proaches 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 piay mode.
3. After the adjustment, apply screwlock to the azimuth
adjusting screw.
Record/Playback Head
Azimuth Screw
Fig. 2
PLAYBACK GAIN ADJUSTMENT
1.Playback the gain adjusted portion (315 Hz, 0 dB) of the LINE OUT
test tape (QZZCFM).
2.Adjust VR1 (L-CH) and VR2 (R-CH) so that the output is
within the standard value.
Standard value: 0.4V+0.5dB
PLAYBACK FREQUENCY RESPONSE
1.
Playback
the
frequency
response
portion
(315Hz,
as
+5dB
12.5kHz~63Hz,
—20dB)
of
the
test
tape
(QZZCFM).
:
|
tl
_]+3a8
2. Assure that the frequency response is within the range ede
shown in Fig. 6 for both L-CH and R-CH. i
—2d0B
P-]-30B
'
t+
! -4-5dB
U
U i +
i t aaa
\
LINE OUT
q
63Hz 100Hz 200Hz2 |[500Hz 1kHz 2kHz 4kHz 12,5 kHz
5Hz 8kHz
Fig. 5
AC BIAS TRAP ADJUSTMENT
1. Insert the Metal blank test tape (QZZCRZ) and set the unit
to the Record mode.
2. Adjust L1 (L-CH) {[L2 (R-CH)]] so that the output voltage
between TP1 (TP2) and GND is less than the minimum
value.
R/P Head <> kp
ut (UH), L2 (R-CH)