Sherwood RX-772, Руководство по обслуживанию

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Measuring methods are based on IHF and IEC standard 268-3
Measurements conditions, unless otherwise noted :
Output resistive load = (8) ohms / Both channel driven
Tone(Bass, Treble), Balance, EQ control : Center Position , Other SW's : OFF
Nominal input level : 5mV for MM, 0.5mV for MC, 220mV for general purpose inputs
Power figures should be kept minimum 10min. between 15 and 35
℃
Terminator : 100ohm for MC, 1kohm for MM and general purpose inputs
Filter : IHF-A filter R/O = Rated Output
Power supply : 230V / 50Hz(RDS), 220V / 60Hz(K)
●
FRONT AMP SECTION ( 2-CH STEREO RECEIVER )
DESCRIPTION INPUT FREQ. REMARK UNIT NOMINAL L/R LIMIT L/R
INPUT SENSITIVITY EXT 1kHz mV 200±30 200±50
@ 1kHz , 47k Ω (RDS) MIC 1kHz mV - -
(K) MIC 1kHz mV 3±0.5 3±1
CHANNEL BALANCE EXT 1kHz R/O TO -40dB dB ±0.5 ±2
RESIDUAL NOISE, IHF-A FILTER 1kHz VOL min.
≤ 0.2 ≤ 0.5
AT INPUT SHORTED 1kHz VOL max. mV
≤
1.5
≤
2
TOTAL HARMONIC DISTORTION 20Hz %
≤
0.02
≤
0.08
1kHz %
≤ 0.02 ≤ 0.08
20kHz %
≤
0.05
≤
0.1
CONTINUOUS AVERAGE POWER 20Hz W 103 100
at (0.08)% THD 1kHz W 103 100
20kHz W 103 100
S/N RATIO, IHF-A FILTER EXT 1kHz R/O dB
≥ 95 ≥ 92
CHANNEL SEPARATION 1kHz dB
≥
65
≥
55
AT INPUT SHORTED 10kHz dB
≥
45
≥
40
FUNCTION CROSSTALK
AUX → CD
1 kHz dB 75 70
AT INPUT SHORTED CD
→
AUX 1 kHz dB 75 70
FREQUENCY RESPONSE (-3dB)
1kHz Ref
15~90 Hz~kHz EXT 10~100
R/O
R/O
8
1W
EXT
9
6
7
R/O TO -3dB
5
EXT 8ohms
3
EXT
4
EXT
SPECIFICATION
No.
1
2