DOWNLOAD LG 42LX6500 / 42LX650N-ZD / 42LX6800 / 42LX6900-ZD (CHASSIS:LD03R) Service Manual ↓ Size: 5.77 MB | Pages: 54 in PDF or view online for FREE

Model
42LX6500 42LX650N-ZD 42LX6800 42LX6900-ZD (CHASSIS:LD03R)
Pages
54
Size
5.77 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lx6500-42lx650n-zd-42lx6800-42lx6900-zd-chassis-.pdf
Date

LG 42LX6500 / 42LX650N-ZD / 42LX6800 / 42LX6900-ZD (CHASSIS:LD03R) Service Manual ▷ View online

- 6 -
No.
Specification
Proposed
Remarks
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel Clock(MHz)
1.
720*400 
31.468 
70.08
28.321 
For only DOS mode
2.
640*480 
31.469 
59.94
25.17 
VESA
Input 848*480 60 Hz, 852*480 60 Hz
-> 640*480 60 Hz Display
3.
800*600
37.879
60.31
40.00 VESA 
4.
1024*768 48.363 60.00
65.00 VESA(XGA) 
5.
1280*768 47.78 59.87
79.5 
WXGA 
 
6.
1360*768 47.72
59.8
84.75 
WXGA
7.
1280*1024 63.595  60.0 
108.875
SXGA
FHD 
model
8.
1920*1080 66.587
59.93
138.625  WUXGA
FHD 
model
7. RGB (PC)
8. HDMI Input
(1) DTV Mode
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1.
720*400 31.468 
70.08 
28.321 
HDCP
2.
640*480 31.469 
59.94 
25.17
VESA  HDCP
3. 800*600
37.879
60.31 
40.00 
VESA 
HDCP
4.
1024*768
48.363
60.00 65.00 
VESA(XGA)
HDCP
5.
1280*768 47.78
59.87
79.5
WXGA  HDCP
6.
1360*768 47.72 59.8 84.75
WXGA  HDCP
7.
1280*1024 63.595
60.0  108.875  SXGA
HDCP/FHD 
model
8.
1920*1080 67.5 
60.00
138.625  WUXGA
HDCP/FHD 
model
(2) PC Mode
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1.
720*480 
31.469 /31.5 
59.94 /60
27.00/27.03
SDTV 480P
2.
720*576 31.25 
50
54 
SDTV 
576P
3.
1280*720 37.500 
50
74.25 
HDTV 
720P
4.
1280*720 
44.96 /45 
59.94 /60
74.17/74.25 
HDTV 720P
5.
1920*1080 
33.72 /33.75 
59.94 /60
74.17/74.25 
HDTV 1080I
6.
1920*1080 28.125 50.00
74.25 
HDTV 
1080I
7.
1920*1080 
26.97 /27 
23.97 /24
74.17/74.25 
HDTV 1080P
8.
1920*1080
33.716 /33.75
29.976 /30.00
74.25
HDTV 1080P
9.
1920*1080 56.250 50
148.5
HDTV 
1080P
10.
1920*1080 
67.43 /67.5 
59.94 /60
148.35/148.50 
HDTV 1080P
- 7 -
9. 3D Mode - HDMI & USB
(1) HDMI Input (1.4)
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
3D input proposed mode
1
1920*1080
53.95 / 54
23.98 / 24
148.35/148.5
HDTV 1080P
Frame packing
2
1280*720
89.9 / 90
59.94/60
148.35/148.5
HDTV 720P
Frame packing
3
1280*720
75
50
148.5
HDTV 720P
Frame packing
4
1920*1080
67.5
60
148.5
HDTV 1080P
Side by Side(half), Top and bottom
5
1920*1080
56.3
50
148.5
HDTV 1080P
Side by Side(half), Top and bottom
6
1280*720
45
60
74.25
HDTV 720P
Side by Side(half), Top and Bottom
7
1280*720
37.5
50
74.25
HDTV 720P
Side by Side(half), Top and Bottom
8
1920*1080
33.7
60
74.25
HDTV 1080i
Side by Side(half), Top and Bottom
9
1920*1080
28.1
50
74.25
HDTV 1080i
Side by Side(half), Top and Bottom
10
1920*1080
27
24
74.25
HDTV 1080P
Side by Side(half), Top and Bottom
11
1920*1080
33.7
30
89.1
HDTV 1080P
Side by Side(half), Top and Bottom
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
3D input proposed mode
1
1280*720
45.00
60.00
74.25
HDTV 720P
Side by Side, Top & Bottom
2
1280*720
37.500
50
74.25
HDTV 720P
Side by Side, Top & Bottom
3
1920*1080
33.75
60.00
74.25
HDTV 1080I
Side by Side, Top & Bottom
4
1920*1080
28.125
50.00
74.25
HDTV 1080I
Side by Side, Top & Bottom
5
1920*1080
27.00
24.00
74.25
HDTV 1080P
Side by Side, Top & Bottom, 
Checkerboard
6
1920*1080
33.75
30.00
74.25
HDTV 1080P
Side by Side, Top & Bottom, 
Checkerboard
7
1920*1080
67.50
60.00
148.5
HDTV 1080P
Side by Side, Top & Bottom, 
Checkerboard, Single Frame Sequential
8
1920*1080
56.250
50
148.5
HDTV 1080P
Side by Side, Top & Bottom,
Checkerboard, Single Frame Sequential
(2) HDMI Input (1.3)
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
3D input proposed mode
Remark
1.
1920*1080 
33.75
30.000
74.25
Side by Side
HDTV 1080P
Top & Bottom
Checkerboard
(3) USB Input
No.
Side by Side
Top & Bottom
Checkerboard
Single Frame Sequential
Frame Packing
1.
(4) 3D Input mode
R
L
L
- 8 -
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with
LD03R chassis.
2. Designation
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order. 
(3) The adjustment must be performed in the circumstance of
25 ºC ± 5 ºC of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation. 
(4) The input voltage of the receiver must keep AC 100-240
V~ 50 / 60Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15.
In case of keeping module is in the circumstance of 0 °C, it
should be placed in the circumstance of above 15 °C for 2
hours 
In case of keeping module is in the circumstance of below -
20 °C, it should be placed in the circumstance of above 15
°C for 3 hours.
[Caution] 
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong. Digital pattern
13ch and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. Automatic Adjustment
3.1. ADC Adjustment
(1) Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate
RGB deviation.
(2) Equipment & Condition
1) Jig (RS-232C protocol)
2) MSPG-925 Series Pattern Generator(MSPG-925FA,
pattern - 65)
- Resolution : 480i Comp1
1080P Comp1
1920*1080 RGB
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
- Image
(3) Adjustment
1) Adjustment method
- Using RS-232, adjust items listed in 3.1 in the other
shown in “3.1.(3).3)”
2) Adj. protocol
Ref.) ADC Adj. RS232C Protocol_Ver1.0
3) Adj. order
- aa 00 00  [Enter ADC adj. mode]
- xb 00 04  [Change input source to Component1(480i&1080p)]
- ad 00 10  [Adjust 480i Comp1]
- xb 00 06  [Change input source to RGB(1024*768)]
- ad 00 10  [Adjust 1024*768 RGB]
- ad 00 90  End adj.
3.2. MAC Address 
(1) Equipment & Condition
- Play file: Serial.exe
- MAC Address edit
- Input Start / End MAC address 
(2) Download method
1) Communication Prot connection
Connect: PCBA Jig-> RS-232C Port== PC-> RS-232C Port
Protocol
Command
Set ACK
Enter adj. mode
aa 00 00
a 00 OK00x
Source change
xb 00 40
b 00 OK40x (Adjust 480i, 1080p Comp1 )
xb 00 60 
b 00 OK60x (Adjust 1920*1080 RGB)
Begin adj.
ad 00 10
Return adj. result
OKx (Case of Success)
NGx (Case of Fail)
Read adj. data
(main)
(main)
ad 00 20 
000000000000000000000000007c007b006dx
(sub)
(Sub)
ad 00 21
000000070000000000000000007c00830077x
Confirm adj.
ad 00 99
NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj.
aa 00 90
a 00 OK90x
 
PCBA 
PC(RS-232C)
 
RS-232C Po rt
 
- 9 -
2) MAC Address Download
- Com 1,2,3,4 and 115200(Baud rate)
- Port connection button click(1)
- Load button click(2) for MAC Address write.
- Start MAC Address write button(3)
- Check the OK Or NG 
3.3. LAN
(1) Equipment & Condition
A
Each other connection to LAN Port of IP Hub and Jig
(2) LAN inspection solution
A
LAN Port connection with PCB
A
Network setting at MENU Mode of TV
A
setting automatic IP
A
Setting state confirmation
-> If automatic setting is finished, you confirm IP and
MAC Address.
3.4. LAN PORT INSPECTION(PING TEST)
Connect SET -> LAN port == PC -> LAN Port
(1) Equipment setting
1) Play the LAN Port Test PROGRAM.
2) Input IP set up for an inspection to Test 
Program.
*IP Number : 12.12.2.2
(2) LAN PORT inspection  (PING TEST)
1) Play the LAN Port Test Program.
2) Connect each other LAN Port Jack.
3) Play Test (F9) button and confirm OK Message.
4) Remove LAN CABLE
3.5. V-COM Adjust(Only LGD(M+S) Module)
- Why need Vcom adjustment?
A
The Vcom (Common Voltage) is a Reference Voltage of
Liquid Crystal Driving.
-> Liquid Crystal need for Polarity Change with every frame.
Row  Li ne
Column  Line
C
LC
C
ST
Pane l
S
Y
S
T
E
M
Gat
e
 Driv
e
 IC
So urce D r i v e  I C
Circuit Block
Ti m i n g  
Co nt r o ll e r
Po w e r  
Blo ck
V
COM
Ga mma
Re f e r e nce V o ltage
Gamm a R eference
Volta ge
Da ta (R ,G,B ) & C ont ro l s ignal
Con t rol si gnal
Data (R ,G,B ) &
Con t rol si gnal
In
te
r
fa
c
e
TFT
Po w e r  I n p u t
Power Input
Da t a  I n p u t
Da t a  I n p u t
V
COM
Liquid 
Crys tal
V
COM
SET
PC
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