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HSS-730/830 & UFD505/515 SERVICE MANUAL
4.
Electrical Specifications
4.1 Power Supply
Type
AC Line Voltage
AC Line Frequency
Power Consumption
Power ON/OFF
5.
Trouble Shooting
5.1. No display on FND with A/C power switch on (Booting Fail)
Check that
Power cable is connected to consent.
Front cable is connected between Front PCB to main board (CON12).
Fuse in SMPS is good.
Cable is connected between SMPS and main board.
Output voltage of SMPS is good.
27MHz clock input to pin 120 of STi5518.
The operation of Flash memory is good (chip select, read, write, address bus, data bus).
The operation of dram or sync dram is good (read, write address bus, data bus).
CPU boots up correctly.
5.2. Remocon doesn't operate
Check that
Battery in remocon is good.
Cable is connected between front and main board.
IR sensor in Front panels operate good.
Remocon signal is transferred from front to main board (at pin 21 of front panel connector).
CPU receives correctly remocon signal (at pin 127 of STi5518).
Switching mode power supply
88 to 264 V
47 to 63 Hz
30W max for operational, 5 W max for standby
Switch on the rear panel
HDT DVB SATELLITE STB
Page
18
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