SERVICE MANUAL
CHASSIS LD21B
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
Screw specification and application situation
SCREW ASSEMBLY WORKING GUIDE
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Side
Rear
LG2111 A
IC101
LS350T/CS460T
Applied Model **LM580T, **560T, **LS350T, **CS460T
TDSN
G301D
LS350S/CS460S
560S, **LS350S, **CS460S
G001D
EXPLODED VIEW
Copyright 2012 LG Electronics. Inc. All rights reserved
GP4LS7LR22011.12.01
to delete CI or gate for
for SYSTEM EEPROM
VDDC
Normal Power
Normal
DDR3
PowerDET
FROM LIPS & POWER B/D
+3.3VNormal
+1.5VDDR
IR/LED and control for normal models
USB1DIODES
USB SIDE
USB2DIODES
HDMI
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
RGB-PC / SPDIF
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
COMMERCIAL/NonOS MODEL OPTION COMMERCIAL MODEL OPTION
RS-232C
For Comsumer model, use 4PIN Wafer
LVDS for large inch
GP4LS7LR22011/06/03 DDR25612
S7LR2DIVXMS10
IC1201
H5TQ1G63DFR-H9C
SFLASHMAINMACRONIX
Serial Flash for SPI boot
SFLASHMAINWINBOND IC1401-*1 W25Q80BVSSIG
PHONE
Headphone *Option HEADPHONE
HEAD
Option name of this page CISLOT because of Hong Kong
CI Region
10067972-0500LF
GP4LS7LR22011/06/14 ETHERNET21
H/W option ETHERNET
ETHERNET
TU2602TU2603 TDSS-G101D TDSN-G301D
GP4RGLOBALTUNERBLOCK
TU2601
TDSQ-G001D
OptionLNB
DVB-S2 LNB Part Allegro
GP4LS7LR22011/11/02 DVBS27
DCDCGND and AGND are connected
FULL SCART / COMPONENT1
SCART / COMPONENT&COMPSIT
JK2801
PSC008-01
AUDIO AMPSTA380BWE
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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