Sansui TU-X30Ii Service Manual

DIGITAL SYNTHESIZER TUNER
CAUTION
SERVICE MANUAL
1. Parts identified by the A\ symbol on the schematic diagram and the parts list
are critical for safety.
Use only replacement parts that have critical characteristics recommended by
the manufacturer.
2. Make leakage-current or resistance measurements to determine that exposed
parts are acceptably insulated from the supply circuit before returning the appli-
ance to the customer.
eSPECIFICATIONS
FM Section
Tuning range................... 87.5 to 108 MHz
Usable sensitivity |
Mono IHF.................. 11.2 dBf
Di inachar eae 2.0 pV
50 dB quieting sensitivity _
MONOas Ec tuseicaseteics 18.0 dBf
SUCT CO: <.tccscncwesatscors hives 38.0 dBf
Signal to noise ratio at 85 dBf
MOU O eesiutretecutot antes 79 dB
StEPOO oo... ec eec eee eeeeeeees 73 dB
Distortion at 65 dBf-
WONG sxe si) scusrceneanctintes less than 0.1% at 1,000 Hz
i) 1 <0 seusere less than 0.2% at 1,000 Hz
Alternate channel selectivity (at 400 kHz)
sagas Mesudsuntpeleendottewereeeee ius 75 dB
Image response ratio....... 45 dB
Spurious response ratio... 75 dB
Stereo separation ............ 40 dB at 1,000 Hz
Frequency response
S(EfeO ised ics eo artemis 30 to 15,000 Hz
+0.3 dB, —0.8 dB
Antenna input impedance 300 ohms balanced
: 75 ohms unbalanced
AM Section
Tuning range................... 530 to 1,600 kHz
Usable sensitivity (TU-X301i)
sha teko me desialdnaddeeanmuinne 50 dB/m
Signal to noise ratio........ 50 dB (85 dB/m)
Image response ratio....... 45 dB at 1,000 kHz
TU-X301iL
LW Section
_ Tuning range................... 153 to 281 kHz
Usable sensitivity ............ 60 dB/m
Others
Output voltage and impedance
Biel aechateatscm cman aptadi naa tiaey 775 mV/2.2 kohms
Power requirements ........ 120/220/240V
50/60 Hz
For U.S.A. and Canada 120V (60 Hz)
Power consumption ........ 10 watts
_ Dimensions......... alaceteane? 430 mm (16-15/16")W
60 mm (2-3/8")H
257 mm (10-1/8")D
Weight ..................cccceeeees 2.8 kg (6.2 Ibs) net
3.4 kg (7.5 lbs) packed
* Design and specifications subject to changes without notice for im-
provements.
* In order to simplify the explanation illustrations may sometimes differ
from the originals.