Adjustment - Sharp SM-SX100 Service Manual

SM-SX100
Measure the noise distribution between the set output terminals (Lch+, Lch- and Rch+, Rch-), and adjust VRA1 to VRA4.
The VRA adjustment sequence is the same as that of the offset voltage adjustment.
Measuring instrument: Yokokawa Electric brand SA2400
Measurement range : Refer to Fig. 10-2. 1
250Hz to 100kHz within ±3dB from the standard noise curve
Adjustable range: 2
(Noise strength of 125Hz) — (Noise strength of 250Hz)
AC POWER
SUPPLY
UNIT
Speaker terminal
Apply the analyzer between Lch+ and Lch-,
and between Rch+ and Rch-.
Figure 10-1
Standard noise floor curve
(Frequency range 1)
20dBV ¨ "

ADJUSTMENT

Specter
Analyzer
Figure 10-2
20dB
– 10 –