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