Technics RS-615US-D - Page 11

MEASUREMENT & ADJUSTMENT
2. If the measured value increases at high frequency range, as shown in
fig. 19, PCB. ue points (A) should be unsoldered and con-
nection points (B) should be shorted (See fig. 22 on page 11).
+2.5dB
+ 2dB
OdB
— 2B
— 2.50B
330Hz 430Hz 6.3kHz = 10kHz
Fig.
The corrected value
4kHz 6 kHz
8kHz
1OkHz
about
—0.2dB
about
—0.8dB
about
—1.0dB
about
—1.5dB
Caution:
Please do not unsolder both connection points (A), (B)
to prevent oscillation.
3. If the measured value increases at middle frequency range, as shown
in fig. 20, P.C.B. connection points (C) should be shorted (See fig. 22
on page 11).
+2548
—
St 208
— 2dB
—2.5dB
333Hz 340Hz 6.3kHz —-10kHz
Fig. 20
The corrected value
LkHz | 2kHz | 4kHz 6kHz
about | about about about
—0.8dB —1.0dB —1.4dB ~1.4dB
4. If the measured value decreases at middle frequency range, as shown
in fig. 21, P-C.B. connection points (D) should be unsoidered (See fig.
22 on page 11).
333Hz 430Hz 6.3kHz 10kHz
Fig. 21
The corrected value
1 kHz 2kHz 4kHz
about about about
+0.3dB +0.7dB +0.8dB
REMARKS
10