Hyundai HSS-730 Service Manual page 25

HSS-730/830 & UFD505/515 SERVICE MANUAL
5.14. 22kHz doesn't output.(view circuit diagram)
Check that
LNB_ENT at pin 193 STi5518 is good operation.
HIGH -> 22kHz On, LOW -> 22kHz Off.
At Pin 14 of Digital tuner module, 22kHz signal generate good.
The switching TR is good.
5.15. Bad or No Signal (View circuit diagram)
Check that
Satellite is selected correctly in menu.
LNB setting is correct in the satellite (LNB Power On, L/O Value..).
Antenna cable is connected to 'SATANT IN' Port of digital tuner.
I2C bus operate good.
NIM30V, NIN5V, POWER3.3V input to Digital tuner module.
HDT DVB SATELLITE STB
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