LG Electronics 55LA625C-ZA Trouble Shooting Guide, Check the booting Voltage, Digital TV Video

Page 16
TROUBLE SHOOTING GUIDE

TROUBLE SHOOTING GUIDE

1. Check the booting Voltage

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑΄ΥΒΟΕ͞ΓΪ͑·ΠΝΥΒΘΖ

ͿΠ

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑΁ΠΨΖΣ͑

Ί ΖΤ

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑ΕΚΤΔΠΟΟΖΔΥΚΠΟ͑ΠΗ͑

ΊΖΤ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑

΁ͥͤ͑ͪ͡ίͣ͢ΡΚΟ͑ͫ͑ͤͦ͜͟· ΐ΄΅͑

 

ʹΠΟΟΖΔΥΠΣ

 

;ΒΚΟ͑ΓΠΒΣΕ͑ͤͦ͟· ͑ΔΚΣΔΦΚΥ

 

ʹΚΣΔΦΚΥ͑ΓΠΒΣΕ

Ί ΖΤ

 

 

 

 

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑;ΚΔΠΞ͑ΧΠΝΥΒΘΖ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͽͥͥ͡

 

 

 

 

 

 

 

 

 

 

ͽͥͥ͑ͫ͑ͤͦ͜͟͡· ΐ΄΅͑

 

 

 

 

 

 

Ί ΖΤ

 

 

 

 

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑ʹͽͼ͑ΠΗ͑Ήͣ͢͡

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑Ήͣ͢͡

 

 

 

 

 

 

 

 

 

ͺΤ͑ͣͥ;͹Ϋ

 

 

 

 

 

 

Ί ΖΤ

 

 

 

 

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑΁Έ΃ΐ΀Ϳ͑ΠΗ͑΁ͥͤ͡

ͿΠ

΃Ζ͞ΕΠΨΟΝΠΒΕ͑ΠΗ͑ͷΚΣΞΨΒΣΖ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑;ΤΥΒΣ͙ͺʹ͚͢͢͡

 

 

͢ΡΚΟ͑ͫ͑ͤͤ͟·

 

 

 

΀Σ͑;ΒΚΟ͑ΓΠΒΣΕ

 

 

Ί ΖΤ

 

 

 

 

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑;ΦΝΥΚ͑·ΠΝΥΒΘΖ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ΔΚΣΔΦΚΥ͑ΓΠΒΣΕ

 

 

 

 

 

 

 

 

 

΁ͥͤ͑ͣ͡ΡΚΟ͑ͫ͑ͣͥ· ͑ͨ͢͝ΡΚΟ͑ͫ͑ͣ͢·

Ί ΖΤ

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑΀ΦΥΡΦΥ͑·ΠΝΥΒΘΖ͑ΠΗ͑ͺʹ͑ͥͣͤͨ͡͠͠

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͺʹͥͣͤͨ͑͡͠͠͝

΂ͥͤ͡

ͺʹͥͣ͑ͫ͑ͣͦ͟͡· ͑͝ͺʹͥͤͫ͑͢͟͢͡· ͑͝ͺʹͥͨ͑ͫ͑ͦ͢͟͡· ͑͝΂ͥͤ͑ͫ͑ͤͤ͟͡·

 

 

 

Ί ΖΤ

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑ΧΠΝΥΒΘΖ͑ΠΗ͑ͽ· ͵΄͑΁ΠΨΖΣ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑΂ͥͪ͡

΂ͥͪ͑ͫ͑ͣ͢͡·

Ί ΖΤ

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑ΠΦΥΡΦΥ͑ΠΗ͑;΄΅Ͳ΃͑ͽ·͵΄

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑;ΤΥΒΣ͙ͺʹ͚͢͢͡

 

΀Σ͑;ΒΚΟ͑ΓΠΒΣΕ

 

 

Ί ΖΤ

 

 

;ΒΜΖ͑ΤΦΣΖ͑ΥΙΖ͑ͺΟΧΖΣΥΖΣ͑ΔΠΟΥΣΠΝ͑ΒΟΕ͑ΖΣΣΠΣ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ΔΚΣΔΦΚΥ͑ΠΣ͑ΔΙΖΔΜ

΁ͥͤ͑ͩ͢͡ΡΚΟ͑ͫ͑͹ΚΘΙ͑ͣͥ͝ΡΚΟ͑ͫ͑ͽΠΨ

 

΅ΙΖ͑ͽʹ͵͑ΞΠΕΦΝΖ

Ί ΖΤ

 

 

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͽʹ͵͑;ΠΕΦΝΖ

 

 

2. Digital TV Video

ʹΙΖΔΜ͑ΥΙΖ͑΄ΥΒΟΕ͞ΓΪ͑·ΠΝΥΒΘΖ

΁ͥͤ͑ͪ͡ίͣ͢ΡΚΟ͑ͫ͑ͤͦ͜͟· ΐ΄΅͑

Ί ΖΤ

 

 

ʹΙΖΔΜ͑ΥΙΖ͑΅ΦΟΖΣ͑ͤͤ͟· ͑

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͽͤͨͤ͡

 

 

ͬ͑ͽͤͨͤ͡

 

 

Ί ΖΤ

 

 

ʹΙΖΔΜ͑ΥΙΖ͑΅ΦΟΖΣ͑ͩ͢͟·

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑ͺʹͤͨͤ͡

 

ͺʹͤͨͤ͑ͣ͡ΡΚΟ͑ͫ͑ͩ͢͟·

 

 

Ί ΖΤ

 

 

ʹΙΖΔΜ͑ΥΙΖ͑ͺͷΐ΁͠Ϳ͑Τ ΚΘΟΒΝ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑΅ΦΟΖΣ

 

΅Άͤͨͥ͑͢͢͢͡͡͠ΡΚΟ

 

 

Ί ΖΤ

 

 

ʹΙΖΔΜ͑ΥΙΖ͑ͽ· ͵΄͑ΠΦΥΡΦΥ͑ΤΚΘΟΒΝ͑ΠΗ͑;ΤΥΒΣ͑ͺʹ

ͿΠ

ͶΩΔΙΒΟΘΖ͑ΥΙΖ͑;ΤΥΒΣ͙ͺʹ͚͢͢͡

΀Σ͑;ΒΚΟ͑ΓΠΒΣΕ

 

 

Copyright ©

LG Electronics. Inc. All rights reserved.

- 16 -

LGE Internal Use Only

Only for training and service purposes

 

 

Image 16
Contents SERVICE MANUAL READ THE SAFETY PRECAUTIONS IN THIS MANUALLED TV MODEL 55LA625C 55LA625C-ZAOnly for training and service purposes CopyrightLG Electronics. Inc. All rights reserved LGE Internal Use OnlySAFETY PRECAUTIONS General GuidanceBefore returning the receiver to the customer Leakage Current Cold CheckAntenna Cold CheckSERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesIC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement RemovalSPECIFICATION 4. Model General Specification1. Application range 3. Test methodSymbolrate 4.0Msymbols/s to 7.2Msymbols/s DVB-TGuard IntervalBitrateMbit/s 1/4, 1/8, 1/16, 1/325. Video resolutions 2D 5.1. Component Input Y, CB/PB, CR/PR5.2. RGB Input PC - HD Model 5.3. RGB Input PC - FHD Model5.3. HDMI InputPC/DTV PCDVIADJUSTMENT INSTRUCTION 1. Application Range2. Designation 3. Main PCB check processAfter downloading, have to adjust Tool Option again 3.1. ADC Process3.2. EDID Download 3.3. EDID data4.1. White Balance adjustment 4. Total Assembly line process3.4 Function Check 5. GND and HI-POT Test 6. Model name & Serial number D/L6.1. Signal Table 4.5. Outgoing condition Configuration7. CI+ key download 6.3. Method & notice7.1. Communication Prot connection 7.2. CI+ Key Download8.1. External speaker8OHM, 1W, Single-End 8. Check Commercial Features8.2. IR OUT 1. Check the booting Voltage TROUBLE SHOOTING GUIDE2. Digital TV Video 3. Analog TV Video 4. AV Video5. RGB Video 6. HDMI Video7. Audio of All iput 8. TV Audio9. AV Audio 10. RGB AudioS7LR2 LGE211A-T8 BLOCK DIAGRAMTuner DVB- T/C EXPLODED VIEW 2012 . 11 2013 S7LR2Copyright 2013 LG Electronics. Inc. All rights reserved SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF ISVDDC NormalFROM LIPS & POWER B/D PowerDET+1.5VDDR +3.3VNormal780 mAIC501 NTP-7500LTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATIONTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC CONTROL IR & LEDLVDS 51Pin LVDS Connector For FHD 60Hz30Pin LVDS Connector FOR FHD REVERSE10bit Change in S7LRHDMI EEPROM HDMI1HDMI2 For CECRS232C RS - 232CHEADPHONE RGB PCSIDE USB PC AUDIOS7LRDIVXMS10 DDR256DDR13331GHYNIX EAN61828901SFLASH REAR COMPONENT PHONE JACK F u l lS c a r t SCART AUDIO MUTEEXTSPEAKERAMP SPEAKER OUT JACKEXTSPK IC1800CI POWER ENABLE CONTROL CI RegionOption name of this page CI SLOT because of Hong Kong PCMCIGP4RGLOBALTUNERBLOCK TU2602TU2603 TDSS-G101D