Technics RS-BX606 - HX Pro and Overall Response Adjustments; Overall Gain Adjustment

| RS-BX606
HX PRO ADJUSTMENT
1.insert the Meta! blank tape (QZZCRZ) and set the unit to
the Record Pause mode.
2. Connect a DC voltmeter across TP5 (L-CH) and GND, TP6
(R-GH) and GND.
3. Adjust L301 (L-CH) and L302 (R-CH)so that the output is
the minimum value.
OVERALL FREQUENCY RESPONSE Normal Overall frequency response chart (NR OUT)
. 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 50H2~10kHz.
. Record the frequency sweep.
. Playback the recorded signal and assure that it is within
the range shown in Fig. 8 in comparison to the reference OOHz 200Hz 500H2 1kHz 2kHz
frequency (1kHz).
. If it is not within the standard range, adjust VR301 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~12.5kHz).
. Assure that the level is within the range shown in Fig. 9.
LINE IN LINE OUT
Fig. 9
OVERALL GAIN ADJUSTMENT
. 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. on
. If it is not within the standard vaiue, adjust VR5 (L-CH) AF cacinator ian dieciietees
and VR6 (R-CH).
. Repeat the step 2~5 above until the output is within the
standard value.
Standard value: 0.4V+0.5dB