Hyundai HSS-730 Service Manual page 19

HSS-730/830 & UFD505/515 SERVICE MANUAL
5.3. Key in front panel doesn't operate
Check that
Cable is connected between front and
main board.
CPU boots up correctly.
5.4. RF-Modulator doesn't operate (Option)
Check that
The type of RF Module is correct in menu.
The channel number is correct in menu.
TV/SAT LED in front panel is off (RF-Module is in modulation mode, not in bypass mode).
The power of RF Modulator (at pin 1, 4, 7).
Video and audio signal is input to RF Modulator (check RF video at pin 6, RF audio at pin
2).
Audio mute is off (if pin 2 is HIGH audio mute is on).
I2C2CLK, I2C2DATA which control
PLL-Type RF Module signal are input
to RF Modulator (I2C2DATA at RF
Modulator pin 3, I2C2CLK at RF
Modulator pin 5).
Ch1 LOW0 (STi5518 pin42)
Ch2 COL0 (STi5518 pin39)
Ch1 I2C1_CLK (STi5518 pin21)
Ch2 I2C1_DAT (STi5518 pin20)
HDT DVB SATELLITE STB
Page 19