Panasonic tc-22lh1 technical guide Service Manual

 
Main CPU 
The Main CPU, located on the DG board, handles all analog operations of the unit via 
the IIC bus lines. It provides the OSD vertical and horizontal sync to the Pixel converter. 
The OSD RGB signals are buffered and output to the Global Core IC, IC4004, for 
mixing with the picture information. It also provides the data for resizing the LCD screen. 
It monitors additionally the safety circuits responsible for shutting down the unit in the 
event of a component failure. 
 
Audio Control Circuitry 
The audio control circuitry handles all available sound adjustments and stereo sound 
separation (MTS decoder). 
 
DG Board  
The main function of this board is to process the incoming video signals and format 
them in order to provide the necessary data for addressing the active matrix LCD 
display.  
 
HDMI-DVI Interface 
The DV Board contains the HDMI-DVI Interface. HDMI (High Definition Multimedia 
interface is considered to be the first all digital consumer electronics A/V interface that 
supports several uncompressed standard, enhanced and high definition video format as 
well as existing multi-channel audio format.  DVI currently does not support audio.  
 
Note: If the external device has DVI output only, use a DVI to HDMI adaptor cable to
 

connect to the HDMI jack on the TV. Also, connect the Audio Out signal from

 

the external device (set top box or DVD player) to the Audio In jacks. An HDMI

 

DVI conversion cable (TY-SCH03DH) is available at the Panasonic parts

 department.

 

 

19