LG 50PG6300-ZA (CHASSIS:PD85A) Service Manual ▷ View online
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)
Repeat A, B,C Process
Check +3.3V, +1.2V of U932,U935
Re-soldering or Change the
defect part(U932,U935)
Fail
Pass
Pass
Check the signal(TS_data, clk, str)
of U612
Re-soldering or Change the
defect part(U661)
Fail
Pass
Check the signal(data,clk,str,cavld)
of U662
Re-soldering or Change the
defect part(U612)
Fail
Pass
Check input source cable or Tuner(U661)
Check the signal input/output
Of U81
Re-soldering or Change the
defect part(U81)
Fail
Pass
Check the signal(CVBS,R,G,B)
of L821,L822,L823,L824
Re-soldering or Change the
defect part(U662)
Fail
Pass
26
10. No Sound – Component Input
- Check the condition of the Component cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
Check the signal(R,L)
of U211
No Sound
Check the signal (R,L) of U81
Re-soldering or Change the
defect part(U81)
Fail
Pass
Re-soldering or Change the
defect part(U211)
Fail
Check input source cable or Jack(JP351)
Pass
Pass
Check the signal (R,L) of U518
Re-soldering or Change the
defect part(U518)
Fail
Pass
Check the signal of Speaker
Check Speaker connector(JP516)
or harness
Fail
Pass
27
11. No Sound – PC Input
- Check the condition of the PC cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
Check the signal(R,L)
of U211
No Sound
Re-soldering or Change the
defect part(U211)
Fail
Check input source cable or Jack(JP377)
Pass
Pass
Repeat D Process
Pass
28
12. No Sound – AV3(CVBS/S-VIDEO) Input
- Check the condition of the RCA cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
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