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