LG 50PG6300-ZA (CHASSIS:PD85A) Service Manual ▷ View online
21
5. No Display – HDMI 1/2/3 Input
-
Check the condition of the HDMI cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
-
Check the EDID data of EEPROM(U311,U326,U327)
Check the signal
input/output of U281
Repeat A, B Process
Check the signal input/output of U81
Re-soldering or Change the
defect part(U81)
Fail
Pass
Re-soldering or Change the
defect part(U281)
Fail
Check input source cable or
jack(JP311,JP326,JP327)
Pass
Pass
22
6. No Display – AV3(CVBS/S-VIDEO) Input
-
Check the condition of the RCA/S-VIDEO cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
Repeat A, B Process
Check the signal input/output of U81
Re-soldering or Change the
defect part(U81)
Fail
Pass
Check input source cable or jack(JP496,497)
Pass
23
7. No Display – AV1/2(SCART) Input
- Check the condition of the SCART cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
Repeat A, B Process
Check the signal input/output of U81
Re-soldering or Change the
defect part(U81)
Fail
Pass
Check input source cable or jack(JP436,466)
Pass
Check the signal(R,G,B/CVBS)
input/output of U397
Re-soldering or Change the
defect part(U397)
Fail
Pass
SCART CVBS Output
Check the signal input/output of U396
Re-soldering or Change the
defect part(U396)
Fail
Pass
Check the signal (SCART CVBS output)
of U81
Re-soldering or Change the
defect part(U81)
Fail
Pass
Check input source cable or jack(JP436,466)
-Level0(TV mode) : 0V to +2V
-Level1A(16:9 mode) : +4.5V to +7V
-Level1B(4:3mode) : +9.5V to +12V
-Level1A(16:9 mode) : +4.5V to +7V
-Level1B(4:3mode) : +9.5V to +12V
- CVBS mode : 0V to 0.4V
- RGB mode : 1V to 3V
- RGB mode : 1V to 3V
24
8. No Display – Analog TV Input
- Check the condition of the RF cable connection.
-
Check the system clock (27MHZ,Y171) and the Voltage of VCTP_P(U81)
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