READ THE SAFETY PRECAUTIONS IN THIS MANUAL
CHASSIS LD21B
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
symbolrate
Specification
Symbolrate 4.0Msymbols/s to 7.2Msymbols/s
DVB-S2 8PSK / 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
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
4.1. Adjustment Preparation
4. Total Assembly line process
3.4 Function Check
5. HI-POT Test
4.3. Outgoing condition Configuration
6.1. Signal Table
6. Model name & Serial number D/L
7.1 MAC Address
7. MAC Address & CI+ key download
6.3. Method & notice
GP4LOW
7.2 LAN Inspection
7.3. LAN PORT INSPECTIONPING TEST
Only for training and service purposes
SCREW ASSEMBLY WORKING GUIDE
Screw specification and application situation
ח ͷͲͳͤͤͤͪͥͣ͢͡ ͙;ͤ͛ͽͥͦ͑͟͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ח ͣ͢ͶͲ
LG2111 A
Rear
Side
IC101
Side
Applied Model **LM580T, **560T, **LS350T, **CS460T
Rear
LG2111 A
Side
560S, **LS350S, **CS460S
Rear
LG2111 A
EXPLODED VIEW
Copyright 2012 LG Electronics. Inc. All rights reserved
Only for training and service purposes
GP4LS7LR22011.12.01
LGE Internal Use Only
VDDC
Normal Power
Only for training and service purposes
Normal
+3.3VNormal
FROM LIPS & POWER B/D
PowerDET
+1.5VDDR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
IR/LED and control for normal models
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
USB2DIODES
USB SIDE
USB1DIODES
Only for training and service purposes
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
HDMI
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
RGB-PC / SPDIF
Only for training and service purposes
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION
For Comsumer model, use 4PIN Wafer
RS-232C
COMMERCIAL/NonOS MODEL OPTION COMMERCIAL MODEL OPTION
Only for training and service purposes
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
LVDS for large inch
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
GP4LS7LR22011/06/03 DDR25612
Only for training and service purposes
S7LR2DIVXMS10
Copyright 2012 LG Electronics. Inc. All rights reserved
Copyright 2012 LG Electronics. Inc. All rights reserved
Serial Flash for SPI boot
Only for training and service purposes
LGE Internal Use Only
Copyright 2012 LG Electronics. Inc. All rights reserved
Headphone *Option HEADPHONE
Only for training and service purposes
LGE Internal Use Only
Only for training and service purposes
CI Region
Option name of this page CISLOT because of Hong Kong
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
Only for training and service purposes
H/W option ETHERNET
GP4LS7LR22011/06/14 ETHERNET21
ETHERNET
TU2602TU2603 TDSS-G101D TDSN-G301D
GP4RGLOBALTUNERBLOCK
Only for training and service purposes
TU2601
GP4LS7LR22011/11/02 DVBS27
DVB-S2 LNB Part Allegro
OptionLNB
Only for training and service purposes
Only for training and service purposes
SCART / COMPONENT&COMPSIT
FULL SCART / COMPONENT1
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC
AUDIO AMPSTA380BWE
Only for training and service purposes
Copyright 2012 LG Electronics. Inc. All rights reserved
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
Only for training and service purposes
A. Video error
voltages of Power
LCD TV
Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%
A. Video error
By using Digital signal level meter By using Diagnostics menu on OSD
Signal Quality Normal over 50%
LCD TV
A. Video error
→ Set-Top-Box, Different maker TV etc
LCD TV
A8/ A9
A. Video error
Check color by input -External Input COMPONENT -RGB
Vertical/Horizontal bar, residual image, light spot
External device screen error-Color error
A. Video error
LCD TV
Check Power On ‘”High”
B. Power error
Check Power LED
Measure voltage of each output of Power B/D
If Power Off mode is not displayed Check Power B/D voltage
B. Power error
Check Power Off Mode
POWEROFFABNORMAL1
LCD TV
C. Audio error
24V of Power
Check user menu Speaker off
LCD TV
C. Audio error
In case of External Input signal error Check and fix external device
Check audio B+ Voltage
LCD TV
D. Function error
1. Remote controlR/C operating error
Check & Repair
Y Check technical Signal information input? - Fix information
D. Function error
Check input signal
Recognition error
LCD TV
E. Noise
Identify nose type
F. Exterior defect
LCD TV