Digital Pcb - LG 60PY2DR Training Manual

CIRCUIT DESCRIPTIONS

DIGITAL PCB

The digital board below is from the 60PY2DR, other models may differ slightly.
The digital PCB provides Digital Signal Processing (dsp) and controls the state of each FET on each
DRIVER B/D with R, G, B, each with 8bit input. This board contains the Cablecard slot and supporting
buffers which are shared with the Cablecard while it is in operation due to the data flow from the
cable headend to the card. This data flow constantly updates the channel list and the CP (Copy
Protect) data and the channel authorization list and the encription and descramble data. This is done
every ten to twenty seconds. This PCB also is host to the HDD (Hard Disk Drive) control circuit. This
circuit will recognize the HDD if it is programmed and formated correctly. These drives are setup
especially for this function, thus a drive from another vender will not function in this unit. This is
done for CP (Copy Protect) reasons. If the HDD is suspect of errors or video issues, power down the
unit and remove A/C and disconnect the IDE cable and power the unit back on. If the problem still
exists, the problem is not on the HDD. The unit can be used without the HDD connected. In this
situation the unit will function normally except any function related to the HDD or demo mode which
is stored on the HDD. This PCB also contains all of the Digital inputs. The analog to digital conversion
is done on this PCB as well.
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Plasma Training Adjustments