LG LSS-3200A Service Manual page 42

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(C1)
Check input stream existence.
Any problem?
NO
Any problem in selecting
ATSC and DSS?
NO
Any decoding problem?
NO
End
FIG. 06
Input Stream to IC400
When DTV is main
Stream Input Check (IC401, 402,403) FIG. 06
YES
Terr. : check VSB/ QAM tunner (TU300) block.
DSS: check TPN- II (IC800 ) block.
YES
Check voltage of IC401(1), 402(1),
403(1). ATSC: 3.3V, DSS: 0V
Check signal strength.
YES
If OK, check system clock 27MHz.
ATSC: IC600(9), DSS: IC605(5)
Check HD 2 chip Interrupt request
signal (R418) FIG. 07
FIG. 07
Interrupt Request Signal on R418
3-33
OK

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