CHASSIS LD21C
SERVICE MANUAL
READ THE SAFETY PRECAUTIONS IN THIS MANUAL
http//aic.lgservice.com
CONTENTS
SAFETY PRECAUTIONS
SERVICING PRECAUTIONS
SPECIFICATION
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
SERVICING PRECAUTIONS
Electrostatically Sensitive ES Devices
IC Remove/Replacement
Replacement
Small-Signal Discrete Transistor Removal/Replacement
Removal
SPECIFICATION
4. Model General Specification
1. Application range
3. Test method
Symbolrate 4.0Msymbols/s to 7.2Msymbols/s
symbolrate
DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s
DVB-S 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
ADJUSTMENT INSTRUCTION
Boot file Download
1. Application Range
2. Designation
3.1. ADC Process
3.3. EDID data
3.2. EDID Download
7. ADC Calibration
3.4 Function Check
4. Total Assembly line process
4.1. Adjustment Preparation
4.5. Outgoing condition Configuration
4.2. EYE-Q function check
4.3. 3D function test
4.4. IR emitter inspection
6.1. Signal Table
5. HI-POT Test
6. Model name & Serial number D/L
5.1. HI-POT auto-check preparation
7. MAC Address & CI+ key download
7.1 MAC Address
7.2 LAN Inspection
7.3. LAN PORT INSPECTIONPING TEST
Rear
Side
LG2111 A
IC101
Applied Model **LM580T, **560T, **LS350T, **CS460T
LS350T/CS460T
TDSN
G301D
G001D
560S, **LS350S, **CS460S
LS350S/CS460S
EXPLODED VIEW
FROM LIPS & POWER B/D
PowerDET
+3.3VNormal
+1.5VDDR
LVDS for large inch
51Pin LVDS Connector For FHD 60Hz
30Pin LVDS Connector
FOR FHD REVERSE10bit
S7LR2DIVXMS10
GP4LS7LR22011/06/03 DDR25612
IC1201
H5TQ1G63DFR-H9C
Serial Flash for SPI boot
GP4LS7LR2
2011/06/03
SFLASH1MB
10067972-0500LF
CI Region
Option name of this page CISLOT because of Hong Kong
ETHERNET
H/W option ETHERNET
GP4LS7LR22011/06/14 ETHERNET21
IR/LED and control for on.y ’12 sub without IR-OUT
IR/CONTROLW/OIROUT
GP4RGLOBALTUNERBLOCK
TU2602TU2603 TDSS-G101D TDSN-G301D
TU2601
TDSQ-G001D
DVB-S2 LNB Part Allegro
OptionLNB
GP4LS7LR22011/11/02 DVBS27
DCDCGND and AGND are connected
AUDIO AMPSTA380BWE
GP4LS7LR22011/11/16 AMPSTA380BWE
NAND FLASH MEMORY
Normal Power
VDDC
Normal
DDR3
USB SIDE
USB1DIODES
HDMI2EANON SIDE HDMI
HDMI1
For CEC
HDMI2
Full Scart
COMPONENT
SCART AUDIO OUT
SCART AUDIO MUTE
RS-232C 4PIN
GP4LS7LR22011/09/26
MSTAR DEBUG4PIN
MSTART DEBUG4PIN
2011/09/05
Page
Contents of LCD TV Standard Repair Process
Contents of LCD TV Standard Repair Process Detail Technical Manual
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Error symptom
Content
A. Video error
LCD TV
Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable
A2 Check Power Board 24v output
voltages of Power
Check various
Board 3.5V,12V,20V
or 24V…
Signal Quality Normal over 50%
By using Digital signal level meter By using Diagnostics menu on OSD
Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%
→ Set-Top-Box, Different maker TV etc
A8/ A9
Check color by input -External Input COMPONENT -RGB
※ Check
Link Cable
External device screen error-Color error
Vertical/Horizontal bar, residual image, light spot
Connect other external device and cable
Check color condition by input -External Input -Component RGB
B. Power error
Check Power LED
Check Power On ‘”High”
Measure voltage of each output of Power B/D
Check Power Off Mode
If Power Off mode is not displayed Check Power B/D voltage
POWEROFFABNORMAL1
POWEROFFCPUABNORMAL
C. Audio error
24V of Power
Check user menu Speaker off
Check audio B+
In case of External Input signal error Check and fix external device
Check audio B+ Voltage
Check & Repair
D. Function error
1. Remote controlR/C operating error
Check input signal
Y Check technical Signal information input? - Fix information
Recognition error
Replace Main B/D
E. Noise
Identify nose type
F. Exterior defect
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM 
SYMBOL MARK OF THE SCHEMETIC.