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
DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s
Symbolrate 4.0Msymbols/s to 7.2Msymbols/s
symbolrate
DVB-S 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
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
4. Total Assembly line process
4.1. Adjustment Preparation
3.4 Function Check
4.3. 3D function test
4.5. Outgoing condition Configuration
4.2. EYE-Q function check
4.4. IR emitter inspection
6. Model name & Serial number D/L
6.1. Signal Table
5. HI-POT Test
5.1. HI-POT auto-check preparation
7.2 LAN Inspection
7. MAC Address & CI+ key download
7.1 MAC Address
7.3. LAN PORT INSPECTIONPING TEST
LG2111 A
Rear
Side
IC101
TDSN
Applied Model **LM580T, **560T, **LS350T, **CS460T
LS350T/CS460T
G301D
560S, **LS350S, **CS460S
LS350S/CS460S
G001D
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
FOR FHD REVERSE10bit
IC1201
S7LR2DIVXMS10
GP4LS7LR22011/06/03 DDR25612
H5TQ1G63DFR-H9C
2011/06/03
Serial Flash for SPI boot
GP4LS7LR2
SFLASH1MB
CI Region
Option name of this page CISLOT because of Hong Kong
10067972-0500LF
H/W option ETHERNET
GP4LS7LR22011/06/14 ETHERNET21
ETHERNET
IR/LED and control for on.y ’12 sub without IR-OUT
IR/CONTROLW/OIROUT
TU2601
GP4RGLOBALTUNERBLOCK
TU2602TU2603 TDSS-G101D TDSN-G301D
TDSQ-G001D
GP4LS7LR22011/11/02 DVBS27
DVB-S2 LNB Part Allegro
OptionLNB
DCDCGND and AGND are connected
AUDIO AMPSTA380BWE
GP4LS7LR22011/11/16 AMPSTA380BWE
NAND FLASH MEMORY
Normal
Normal Power
VDDC
DDR3
USB SIDE
USB1DIODES
For CEC
HDMI2EANON SIDE HDMI
HDMI1
HDMI2
SCART AUDIO OUT
Full Scart
COMPONENT
SCART AUDIO MUTE
RS-232C 4PIN
GP4LS7LR22011/09/26
MSTART DEBUG4PIN
2011/09/05
MSTAR DEBUG4PIN
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
Board 3.5V,12V,20V
voltages of Power
Check various
or 24V…
By using Digital signal level meter By using Diagnostics menu on OSD
Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%
Signal Quality Normal over 50%
→ Set-Top-Box, Different maker TV etc
※ Check
A8/ A9
Check color by input -External Input COMPONENT -RGB
Link Cable
Connect other external device and cable
External device screen error-Color error
Vertical/Horizontal bar, residual image, light spot
Check color condition by input -External Input -Component RGB
Check Power On ‘”High”
B. Power error
Check Power LED
Measure voltage of each output of Power B/D
POWEROFFABNORMAL1
Check Power Off Mode
If Power Off mode is not displayed Check Power B/D voltage
POWEROFFCPUABNORMAL
Check user menu Speaker off
C. Audio error
24V of Power
Check audio B+
In case of External Input signal error Check and fix external device
Check audio B+ Voltage
D. Function error
1. Remote controlR/C operating error
Check & Repair
Recognition error
Check input signal
Y Check technical Signal information input? - Fix information
Replace Main B/D
E. Noise
Identify nose type
F. Exterior defect