LG 50PG6300 Service Manual page 25

9. No Display – DTV Input
- Check the condition of the RF cable connection.
- Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
- Check the system clock (4MHZ, Y716) and the Voltage of Mojo(U662)
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Only for training and service purposes
Repeat A, B,C Process
Pass
Check +3.3V, +1.2V of U932,U935
Pass
Check the signal(TS_data, clk, str)
of U612
Pass
Check the signal(data,clk,str,cavld)
of U662
Pass
Check the signal(CVBS,R,G,B)
of L821,L822,L823,L824
Pass
Check the signal input/output
Of U81
Pass
Check input source cable or Tuner(U661)
Fail
Fail
Fail
Fail
Fail
­25­
Re-soldering or Change the
defect part(U932,U935)
Re-soldering or Change the
defect part(U661)
Re-soldering or Change the
defect part(U612)
Re-soldering or Change the
defect part(U662)
Re-soldering or Change the
defect part(U81)
LGE Internal Use Only