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