READ THE SAFETY PRECAUTIONS IN THIS MANUAL
CHASSIS LD21C
SERVICE MANUAL
http//aic.lgservice.com
SERVICING PRECAUTIONS
CONTENTS
SAFETY PRECAUTIONS
SPECIFICATION
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
SERVICING PRECAUTIONS
Electrostatically Sensitive ES Devices
Small-Signal Discrete Transistor Removal/Replacement
IC Remove/Replacement
Replacement
Removal
1. Application range
SPECIFICATION
4. Model General Specification
3. Test method
symbolrate
Specification
Symbolrate 4.0Msymbols/s to 7.2Msymbols/s
DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s
5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported
5. Video resolutions 2D
5.1. Component Input Y, CB/PB, CR/PR
5.3. HDMI InputPC/DTV
PCDVI
1. Application Range
ADJUSTMENT INSTRUCTION
Boot file Download
2. Designation
3.2. EDID Download
3.1. ADC Process
3.3. EDID data
7. ADC Calibration
3.4 Function Check
4. Total Assembly line process
4.1. Adjustment Preparation
5. HI-POT Test
4.3. Outgoing condition Configuration
6.1. Signal Table
6. Model name & Serial number D/L
7.1 MAC Address
7. MAC Address & CI+ key download
6.3. Method & notice
GP4LOW
7.2 LAN Inspection
7.3. LAN PORT INSPECTIONPING TEST
LG2111 A
Rear
Side
IC101
Side
Applied Model **LM580T, **560T, **LS350T, **CS460T
Rear
LG2111 A
Side
560S, **LS350S, **CS460S
Rear
LG2111 A
EXPLODED VIEW
+3.3VNormal
FROM LIPS & POWER B/D
PowerDET
+1.5VDDR
30Pin LVDS Connector
LVDS for large inch
51Pin LVDS Connector For FHD 60Hz
Only for training and service purposes
GP4LS7LR22011/06/03 DDR25612
Only for training and service purposes
S7LR2DIVXMS10
Copyright 2012 LG Electronics. Inc. All rights reserved
GP4LS7LR2
Serial Flash for SPI boot
Only for training and service purposes
2011/06/03
Only for training and service purposes
CI Region
Option name of this page CISLOT because of Hong Kong
Copyright 2012 LG Electronics. Inc. All rights reserved
Only for training and service purposes
H/W option ETHERNET
GP4LS7LR22011/06/14 ETHERNET21
ETHERNET
Copyright 2012 LG Electronics. Inc. All rights reserved
IR/LED and control for on.y ’12 sub without IR-OUT
Only for training and service purposes
LGE Internal Use Only
TU2602TU2603 TDSS-G101D TDSN-G301D
GP4RGLOBALTUNERBLOCK
Only for training and service purposes
TU2601
GP4LS7LR22011/11/02 DVBS27
DVB-S2 LNB Part Allegro
OptionLNB
Only for training and service purposes
GP4LS7LR22011/11/16 AMPSTA380BWE
AUDIO AMPSTA380BWE
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
LGE Internal Use Only
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
NAND FLASH MEMORY
VDDC
Normal Power
Only for training and service purposes
Normal
Only for training and service purposes
USB SIDE
USB1DIODES
Copyright 2012 LG Electronics. Inc. All rights reserved
HDMI1
HDMI2EANON SIDE HDMI
Only for training and service purposes
For CEC
COMPONENT
Full Scart
Only for training and service purposes
SCART AUDIO OUT
Copyright 2012 LG Electronics. Inc. All rights reserved
RS-232C 4PIN
Only for training and service purposes
LGE Internal Use Only
GP4LS7LR2
MSTART DEBUG4PIN
Only for training and service purposes
2011/09/05
Page
Contents of LCD TV Standard Repair Process
Error symptom
Contents of LCD TV Standard Repair Process Detail Technical Manual
Continue to the next page
Content
Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable
A. Video error
LCD TV
A2 Check Power Board 24v output
Only for training and service purposes
A. Video error
voltages of Power
LCD TV
Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%
A. Video error
By using Digital signal level meter By using Diagnostics menu on OSD
Signal Quality Normal over 50%
→ Set-Top-Box, Different maker TV etc
A. Video error
LCD TV
LCD TV
A8/ A9
A. Video error
Check color by input -External Input COMPONENT -RGB
Vertical/Horizontal bar, residual image, light spot
External device screen error-Color error
A. Video error
LCD TV
Check Power On ‘”High”
B. Power error
Check Power LED
Measure voltage of each output of Power B/D
If Power Off mode is not displayed Check Power B/D voltage
B. Power error
Check Power Off Mode
POWEROFFABNORMAL1
LCD TV
C. Audio error
24V of Power
Check user menu Speaker off
LCD TV
C. Audio error
In case of External Input signal error Check and fix external device
Check audio B+ Voltage
LCD TV
D. Function error
1. Remote controlR/C operating error
Check & Repair
Y Check technical Signal information input? - Fix information
D. Function error
Check input signal
Recognition error
Identify nose type
E. Noise
LCD TV
F. Exterior defect
LCD TV