Technics SA-GX230 Service Manual

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AV Control Stereo Receiver
Service Manual ORDER NO. AD9206177C2
Receiver
Colour
Area
SPECIFICATIONS (DIN 45 500)
lI AMPLIFIER SECTION
Power output
DIN 1 kHz (T.H.D. 1%) 2x80 W (4 Q)
40 Hz~20 kHz continuous power output
both channels driven 2x50 М (80)
Total harmonic distortion.
rated power at 40 Hz~20 kHz - : 0.5% (8 О)
half power at 1 kHz
Intermodulation distortion
rated power at 60 Hz: 7 kHz—4:1, SMPTE
Power bandwidth
both channels driven, —3 dB
0.5% (8 О)
10 Н2--40 kHz (8 О)
Damping factor 40 (8 Q)
Input sensitivity and Impedance :
PHONO 3 mV/47 КО
CD, VCR 1 200 mV/22 КО
. VCR2, TAPE . 200 mV/22 kQ
PHONO maximum input voltage (1 kHz, AMS): 150 mV
S/N at rated power (8 ©) .
70 dB (ІНЕ, А: 80 dB)
РНОМО
CD, VCR 1 80 dB (IHF, A:90 dB)
VCR 2, TAPE 80 dB (IHF, A:90 dB)
Frequency response |
РНОМО RIAA standard curve
| +0.8 dB (30 Hz~15 kHz)
CD, VCR 1 10 Hz~40 kHz (+3 dB)
VCR 2, TAPE 10 Hz~40 kHz (+3 dB)
Tone controls |
Bass . 50 Hz, +10 dB— —10 dB
Treble 20 kHz, +10 dB— — 10 dB
Loudness control (volume at —30 dB) 50 Hz, +9 dB
Output voltage
VCR 1 OUT 200 mV
TAPE REC (OUT) 200 mV
Channel balance, 250 Hz~6.3 kHz +1 dB
Channel separation - . 55 dB
Headphones output level and impedance 430 mV/330 Q
Load impedance
40-160
80—16 Q
А ог В
А апа В
Technics
0.03% (8 Q) .
Suffix for
E ж
(ЕС) Germany and Italy. (К) (5)
ll FM TUNER SECTION
Frequency range
Sensitivity
SIN 30 dB .1.5 uV (75 Q)
SIN 26 dB 1.3шУ (75 О)
SIN 20 ав _ | 1.2uV (75 О)
IHF usable sensitivity 1.5 uV (IHF'58, 75 О)
ІНЕ 46 dB stereo quieting sensitivity . 22 uV/75 О
Total harmonic distortion
MONO . 0.2%
STEREO | 0.3%
S/N m ; cd
MONO 60 dB (75 dB, IHF)
STEREO 58 dB (71 dB, IHF)
Frequency response 20 Hz~15 kHz, +1 dB— —2 dB
Alternate channel selectivity i
87.50~108.00 MHz -
+400 kHz 65 dB -
Capture ratio 1.0 dB
Image rejection at 98 MHz 40 dB
IF rejection at 98 MHz 70 dB
Spurious response rejection at 98 MHz 70 dB
AM suppression 50 dB
Stereo separation
_1kHz - — 40 dB
Carrier leak
19 kHz —55 dB (—60 dB, IHF)
38 kHz —50 dB (—55 ав, ІНЕ)
Channel balance (250 Н2--6.3 06 + 1.5 ав
Limiting point 1.2 uV
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminals 75 О (unbalanced)