Panasonic gp6d th-42px20u th-50px20u th-42pa20u th-37pa20u update information Service Manual

 

 

 
GP6 series plasma panels incorporate two NTSC tuners. The main tuner is used 
for primary picture operation. It provides a composite video and a multiplex audio 
output. The sub-tuner provides only a video output used for multi picture 
functions. The video outputs of the tuners are connected to the input switch IC on 
the H Board. The unit also contains three video inputs that are also connected to 
the input switch IC. The input switch IC selects one of the 5 video inputs for main 
picture operation and another for sub-picture operation. Selection is controlled by 
the MPU via the I

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C Bus (SDA & SCL). These two outputs are then connected to 

the main switch IC.  
 
The panel also contains three component inputs and a DVI or HDMI input 
(depending upon the model) that are connected to the main switch. The DVI or 
HDMI input connector, connected to the DG Board, outputs the digital signal to 
the DVI or HDMI receiver where it undergoes serial to parallel conversion. The 
output of the receiver is then converted to a Y, Pb, and Pr component signals 
before being applied to the Main switch. The MPU selects one of the 8 inputs for 
main picture operation and another for sub-picture operation.  
 
On the DG- Board, the global core IC (GC2M) converts the composite video 
signal of the main picture to RGB video signals. The GC2S IC processes the 
sub-picture information and combines it with the main picture. It performs 

 

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