Page 2 - CONTENTS
- 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ................................................
Page 3 - General Guidance; isolation Transformer should always be used; Before returning the receiver to the customer,; AC leakage current check; Leakage Current Cold Check(Antenna Cold Check); Do not use a line Isolation Transformer during this check.; Leakage Current Hot Check circuit; IMPORTANT SAFETY NOTICE; SAFETY PRECAUTIONS
- 3 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is e...
Page 4 - SERVICING PRECAUTIONS; CAUTION
- 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this ...
Page 5 - IC Remove/Replacement; Removal; Circuit Board Foil Repair; At IC Connections
- 5 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the cir- cuit foil. When holes are...
Page 6 - SPECIFICATION; Requirement for Test
- 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LCD TV used LD23E ch...
Page 9 - ADJUSTMENT INSTRUCTION; MAIN PCBA Adjustments
- 9 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 1. Application Range This spec. sheet applies to LD2FF Chassis applied LCD TV all models manufactured in TV factory. 2. Designation (1) Because this is not ...
Page 10 - SET
- 10 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.3. LAN Inspection 3.3.1. Equipment & Condition ▪ Each other connection to LAN Port of IP Hub and Jig 3.3.2. LAN inspection solution ▪ LAN Port connection with PCB▪ Network ...
Page 13 - ▪ W/B Adj. must begin as start command “wb 00 00” , and
- 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ▪ Adj. Map 4.2.5. Adjustment method (1) Auto WB calibration 1) Set TV in ADJ mode using P-ONLY key(or POWER ON key) 2) Place optical probe on the center of the display - It need ...
Page 14 - Check Commercial features
- 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4.4. Wi-Fi Test Step 1) Turn on TV Step 2) Select Network Connection option in Network Menu. Instart menu -> Menu -> Network Setup Step 3) Select Start Connection button in...
Page 15 - AUDIO output check
- 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5.2. IR Out and DC Power Outlet (12V) (1) Equipment & Condition ▪ Jig (commercial check JIG) ▪ Special 232C Cable for commercial check Jig ▪ Power only mode ▪ PCB mode (insta...
Page 16 - Optional adjustments
- 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 8. USB S/W Download(Service only) (1) Put the USB Stick to the USB socket. (2) Automatically detecting update file in USB Stick. - If your downloaded program version in USB Stick...
Page 17 - TROUBLESHOOTING GUIDE; Power-Up Boot Fail Trouble Shooting guide
- 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes TROUBLESHOOTING GUIDE 1. Power-Up Boot Fail Trouble Shooting guide 2. No OSD Trouble Shooting guide Check P2401 All Voltage Level (3.5V, 12V, 24V). Check P2401 All Voltage Level ...
Page 18 - Analog RF Video Trouble Shooting guide; Check MTK LVDS output.
- 18 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3. Analog RF Video Trouble Shooting guide Check RF cable & signal. Check tuner 3.3V power L6502. Check tuner 5V power R6513. Check MTK LVDS output. Check TU6500 Pin8. (Video ...
Page 19 - Digital RF Trouble Shooting guide; Check DIF Signal
- 19 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4. Digital RF Trouble Shooting guide Check RF cable & signal. Check DIF Signal TU6500 Pin#10,11. Check IIC Signal TU6500 Pin#3,4. Replace IC105. Check tuner 5V power R6513. C...
Page 20 - AV Video Trouble Shooting guide
- 20 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. AV Video Trouble Shooting guide Check input signal format. Is it supported? Check the input of MTK(IC105). Measure waveform at C616 because it’s more easy to check. Can you se...
Page 21 - HDMI Video Trouble Shooting guide
- 21 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 6. HDMI Video Trouble Shooting guide Check input signal format. Is it supported? This board has big problem because Main chip (MTK) have some troubles. After checking thoroughly ...
Page 23 - Analog RF Audio Trouble Shooting guide; Check Audio AMP output L5402,
- 23 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 8. Analog RF Audio Trouble Shooting guide Check RF cable & signal. Check IC5400. Check Audio AMP output L5402, L5403, L5404, L5405. Replace IC105. Check TU6500 Pin6. (SIF out...
Page 25 - HDMI Audio in Trouble Shooting guide; Check input signal format.
- 25 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 10. HDMI Audio in Trouble Shooting guide Check input signal format. Is it supported? This board has big problem because Main chip (MTK) have some troubles. After checking thoroug...
Page 26 - BLOCK DIAGRAM; LG; pe; ear
- 26 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes BLOCK DIAGRAM LG E2 11 2 (E U C om m er ci al ) SP D IF O U T N A N D Fl as h (1 6G b) U SB C VB S( M ) D IF (+ /-) U S B 1 PC -R G B E xt . S PK S PD IF LA N SY ST EM D D R 3 X ...
Page 27 - EXPLODED VIEW
- 27 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes LV 1 300 200 540 521 530 401 550 810 120 500 570 501 510 400 900 910 A2 A4 A10 * Set + Stand * Stand Base + Body EXPLODED VIEW Many electrical and mechanical parts in this chassi...
Page 28 - H D C P E E P R O M
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 29 - PLACE AT JACK SIDE
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 34 - F R O M L I P S & P O W E R B / D; F O R L P B D o w n l o a d
T H E R M A L THERMAL THERMAL THERMAL T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W ...
Page 35 - H P D S W I T C H
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 39 - U S B T o S E R I A L I / F
USB DOWN STREAM USB DOWN STREAM THERMAL THERMAL THERMAL T H E R M A L T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C ...
Page 43 - O p t i o n F O R M T K
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 45 - L V D S
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 47 - D o n ’ t C o n n e c t P o w e r A t V D D I
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 49 - E X T _ S P K A M P; E X T _ S P K O P A M P
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 51 - S M D G A S K E T
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...
Page 52 - Ethernet Block; L A N 2
T H E R M A L T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G ...
Page 53 - E X T E R N A L _ P O W E R O U T 5 V / 1 2 V; E X T E R N A L _ P O W E R D E T E C T I O N
THERMAL THERMAL T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N ...
Page 54 - P o w e r
T H E S Y M B O L M A R K O F T H I S S C H E M E T I C D I A G R A M I N C O R P O R A T E SS P E C I A L F E A T U R E S I M P O R T A N T F O R P R O T E C T I O N F R O M X - R A D I A T I O N .F I L R E A N D E L E C T R I C A L S H O C K H A Z A R D S , W H E N S E R V I C I N G I F I S E S S ...