DOWNLOAD LG 42LY99-ZC (CHASSIS:LD75C) Service Manual ↓ Size: 4.83 MB | Pages: 28 in PDF or view online for FREE

Model
42LY99-ZC (CHASSIS:LD75C)
Pages
28
Size
4.83 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42ly99-zc-chassis-ld75c.pdf
Date

LG 42LY99-ZC (CHASSIS:LD75C) Service Manual ▷ View online

- 10 -
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD75C chassis
manufactured at LG TV Plant all over the world.
2. Specification.
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 to
protect test instruments
2) Adjustment must be done in the correct sequence.
3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specified
designation.
4) The input voltage of the receiver must be kept between
100-220V~, 50/60Hz.
5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Channel Memory
1) Press ADJ key in Adjust remote control.
2) Select “System Control 3” by using 
D
/
E
(CH+/-) key, and
press 
A
(ENTER).
3) Select “Channel Recover” by using 
D
/
E
(CH+/-) key, and
press 
G
(VOL+).
4) When Channel Recover is completed, set will be turned off
and LED light og to stand-by model.
Tool option 1 and 2 are fixed. So, you need not chaange
these munbers.
4. ADC Calibration
- This process should be done at insert process. If ADC Cal. is
not done at whole assembly line , you should do this
process again.
<Caution>
- System control RS-232 Host should be “PC” for adjustment.
- Before AV ADC Calibration, execute the “Module selection”.
4.1. Adjustment of RF/AV/S-VIDEO
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has Video
Signal: 7 Color Bar Pattern shown in Fig. 1)
=> Model: 202 / Pattern: 65
(2) Method of Auto RF/AV/S-VIDEO Color Balance.
1) Input the Video Signal: 7 Color Bar signal into AV3.
2) Set the PSM to Dynamic mode in the Picture menu.
3) Press IN-START key on R/C for adjustment.
4) Press the 
G
(Vol.+) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
4.2. Adjustment of Component.
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has 720p/60Hz
YPbPr output Pattern shown in Fig. 1 )
=> Model:215/Pattern: 65
(2) Method of Auto Component Color Balance
1) Input the Component 720p/50Hz 7 Color Bar(MSPG-
925FS model:215, pattern:65) signal into Component.
2) Set the PSM to Dynamic mode in the Picture menu
3) Press the IN-START key on R/C for adjustment.
4) Press the 
G
(Vol.+) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
Model Name Tool option 1 Tool option 2 Maker Inch
Tool
42LY99
228087
1733
WCG
42
LY99
ADC
RF/AV/S-VIDEO
Component
RGB-PC
MSPG925FS PALJ
Model:215 (720P) Model: 3 
INPUT  SELECT     AV3
Pattern:65
(1024*768 60Hz)
Model: 202 (PAL-BGDHI) 720P/50Hz 
Pattern: 65
Pattern: 65
7 Color Bar
PAL 7 Color Bar
<Fig. 1>
- 11 -
4.3 Adjustment of RGB
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925F Pattern Generator
(Which has XGA [1024*768] 60Hz 8 Color Bar 100%
pattern shown in Fig. 1)
(2) Method of Auto RGB Color Balance
1) Input the PC 1024x768@60Hz 100% Color Bar pattern
(MSPG-925F model:37, pattern:33) into RGB. 
(Using D-sub to D-sub cable)
2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment
4) Press the 
G
(Vol.+) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
5. EDID
* Caution
1) Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
2) Never connect HDMI & D-sub Cable at the same time.
3) Use the proper cables below for EDID Writing.
4) Download HDMI1, HDMI2, HDMI3 separately because
HDMI1 is different from HDMI2, HDMI3.
5.1. EDID Data
5.2. Data
(1) ANALOG (128 bytes)
(2) HDMI 1 (256 bytes)=> 
(3) HDMI 2 (256 bytes)
(4) HDMI 3 (256 bytes)
-> Detail EDID Options are below (a, b, c, d, e-1, e-2, f-1)
(a) Product ID
(b) Serial No:  Controlled on production line.
(c) Month, Year: Controlled on production line:
ex) Monthly : ‘09’ -> ‘09’ 
Year      : ‘2006’ -> ‘10’
(d) Model Name(Hex): 42LY99 ->
000000FC0034323C5939390A202020202020
(e-1, e-2, f-1, f-2) Checksum: Changeable by total EDID data.
Item
Manufacurer ID
Version
Revision
Condition
GSM
Digital : 1
Digital : 3
Data(Hex)
1E6D
01
03
D-sub to D-sub
DVI-D to HDMI or HDMI ro HDMI
For HDMI EDID
For Analog EDID
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 0
FF
FF
FF
FF
FF
FF
0
1E
6D
0x01
01
03
01
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x02 11
49
4B
A5
6E
0
31
40
45
40
61
40
81
80
90
40
0x03 D1 C0
01
01
01
01
1A
36
80
A0
70
38
1F
40
30
20
0x04 35
00
E8
26
32
00
00
1A
DA
2F
78
E0
51
1A
25
40
0x05 59
98
14
00
E8
26
32
00
00
1A
00
00
00
FD
00
39
0x06 4B
1F
54
12
00
0A
20
20
20
20
20
20
0x07
-1
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
01
01
01
01
0x10
01
03
80
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x20 11
49
4B
A5
6E
00
31
40
45
40
61
40
81
80
90
40
0x30 A9
40
D1
C0
01
01
1A
36
80
A0
70
38
1F
40
30
20
0x40 35
00
E8
26
32
00
00
1A
1B
21
50
A0
51
00
1E
30
0x50 48
88
35
00
BC
86
21
00
00
1C
00
00
00
FD
00
39
0x60 4B
1F
54
12
00
0A
20
20
20
20
20
20
0x70
01
-2
0x80 02
03
21
F1
4E
81
02
03
15
12
13
04
14
05
20
21
0x90 22
1F
10
23
09
07
07
83
01
00
00
65
03
0C
00
10
0xA0 00
01
1D
00
80
51
D0
1C
20
40
80
35
00
BC
88
21
0xB0 00
00
1E
8C
0A
D0
8A
20
E0
2D
10
10
3E
96
00
13
0xC0 8E
21
00
00
18
2
3A
80
18
71
38
2D
40
58
2C
45
0xD0 00
06
44
21
00
00
1E
01
1D
80
18
71
1C
16
20
58
0xE0 2C
25
00
C4
8E
21
00
00
9E
4E
1F
00
80
51
00
1E
0xF0 30
40
80
37
00
BC
88
21
00
00
18
00
00
00
00
-1
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
0x10
01
03
80
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x20 11
49
4B
A5
6E
00
31
40
45
40
61
40
81
80
90
40
0x30 A9
40
D1
C0
01
01
1A
36
80
A0
70
38
1F
40
30
20
0x40 35
00
E8
26
32
00
00
1A
1B
21
50
A0
51
00
1E
30
0x50 48
88
35
00
BC
86
21
00
00
1C
00
00
00
FD
00
39
0x60 4B
1F
54
12
00
0A
20
20
20
20
20
20
0x70
01
-2
0x80 02
03
21
F1
4E
81
02
03
15
12
13
04
14
05
20
21
0x90 22
1F
10
23
09
07
07
83
01
00
00
65
03
0C
00
20
0xA0 00
01
1D
00
80
51
D0
1C
20
40
80
35
00
BC
88
21
0xB0 00
00
1E
8C
0A
D0
8A
20
E0
2D
10
10
3E
96
00
13
0xC0 8E
21
00
00
18
02
3A
80
18
71
38
2D
40
58
2C
45
0xD0 00
06
44
21
00
00
1E
01
1D
80
18
71
1C
16
20
58
0xE0 2C
25
00
C4
8E
21
00
00
9E
4E
1F
00
80
51
00
1E
0xF0 30
40
80
37
00
BC
88
21
00
00
18
00
00
00
00
-1
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
0x10
01
03
80
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x20 11
49
4B
A5
6E
00
31
40
45
40
61
40
81
80
90
40
0x30 A9
40
D1
C0
01
01
1A
36
80
A0
70
38
1F
40
30
20
0x40 35
00
E8
26
32
00
00
1A
1B
21
50
A0
51
00
1E
30
0x50 48
88
35
00
BC
86
21
00
00
1C
00
00
00
FD
00
39
0x60 4B
1F
54
12
00
0A
20
20
20
20
20
20
0x70
01
-2
0x80 02
03
21
F1
4E
81
02
03
15
12
13
04
14
05
20
21
0x90 22
1F
10
23
09
07
07
83
01
00
00
65
03
0C
00
30
0xA0 00
01
1D
00
80
51
D0
1C
20
40
80
35
00
BC
88
21
0xB0 00
00
1E
8C
0A
D0
8A
20
E0
2D
10
10
3E
96
00
13
0xC0 8E
21
00
00
18
02
3A
80
18
71
38
2D
40
58
2C
45
0xD0 00
06
44
21
00
00
1E
01
1D
80
18
71
1C
16
20
58
0xE0 2C
25
00
C4
8E
21
00
00
9E
4E
1F
00
80
51
00
1E
0xF0 30
40
80
37
00
BC
88
21
00
00
18
00
00
00
00
-1
- 12 -
* Before White-balance, the AV ADC should be done.
6. White Balance
* Test Equipment
Color Analyzer (42LY99-ZC use WCG Panel. If you use CA-
210, CH.12 should be selected)
: When you adjust LCD color temperature on Color analyzer
(CA-210), you should use Channel 9 in NCG Module and
Channel 12 in WCG. Matrix compensated (White, Red,
Green, Blue revised) by CS-1000 and can be helped in
accordance with White balance adjustment coordinate which
is specified on the next.
* Color temperature standards according to CSM and Module
Cool : 11,000k
Medium : 9,300k
Warm : 6,500k
* White balance adjustment coordinate and color temperature
- PC (for communication through RS-232C)
-> UART Baud rate : 115200 bps
- Luminance Y AV : upper 200 cd/m
2
≥ (Typ : 350 cd/m
2
)
-> Applying to Cool
* Connecting picture of  the measuring instrument
(On Automatic control )
: Inside PATTERN is used when W/B is controlled. Connect
to auto controller or push control R/C IN-START -> Enter the
mode of White-Balance, the pattern will come out.
- Measurement color analyzer : CS1000 or CA210(CH 12)
- Auto adjustment Map (RS-232C)
* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2) Adhere closely  the Color Analyzer (CA-210) to the
module less than 10cm distance, keep it with the surface
of the Module and Color Analyzer’s Prove
vertically.(80~100°).
3) Aging time  
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others,
check the back light on.
CS-1000
CA-210(CH 9)
CA-100+(CH9)
Cool
x
0.276±0.002
0.276±0.002
0.276±0.002
y
0.283±0.002
0.283±0.002
0.283±0.002
Temp.
11000
11000
11000
Δuv
0.000
0.000
0.000
Medium
x
0.285±0.002
0.285±0.002
0.285±0.002
y
0.293±0.002
0.293±0.002
0.293±0.002
Temp.
9300
9300
9300
Δuv
0.000
0.000
0.000
Warm
x
0.313±0.002
0.313±0.002
0.313±0.002
y
0.329±0.002
0.329±0.002
0.329±0.002
Temp.
6500
6500
6500
Δuv
0.003
0.003
0.003
<Fig. 2> Connecting picture (On Automatic Control)
Type
LD73C
Baud Rate
Data bit
Stop bit
Parity
115200
8
1
None
Index
Cmd 1 Cmd 2 Data Min Value
Max Value
R-Gain_Normal
j
a
00(00)
128(80)
G-Gain_Normal
j
b
00(00)
128(80)
B-Gain_Normal
j
c
00(00)
128(80)
R-Gain_Warm
j
d
00(00)
128(80)
G-Gain_Warm
j
e
00(00)
128(80)
B-Gain_Warm
j
f
00(00)
128(80)
R-Gain_Cool
j
g
00(00)
128(80)
G-Gain_Cool
j
h
00(00)
128(80)
B-Gain_Cool
j
i
00(00)
128(80)
R-Offset_Normal
l
j
00(00)
128(80)
G-Offset_Normal
l
k
00(00)
128(80)
B-Offset_Normal
l
l
00(00)
128(80)
R-Offset_Warm
l
m
00(00)
128(80)
G-Offset_Warm
l
n
00(00)
128(80)
B-Offset_Warm
l
o
00(00)
128(80)
R-Offset_Cool
l
p
00(00)
128(80)
G-Offset_Cool
l
q
00(00)
128(80)
B-Offset_Cool
l
r
00(00)
128(80)
w
b
00
Starting W/B ADJ
w
b
10
Using internal Pattern
w
b
ff
Ending W/B ADJ
- 13 -
6.1. Auto white Balance
(Set:RS-232, Host:PC, Baud Rate:115200bps, Download:Cortez)
Inside pattern is used when balance is controlled.
Connect as below figure and click the start button on W/B
execution program.
W/B is automatically processing Cool --> Medium --> Warm in
order.
When W/B is completed, you can see ‘OK’ on PC monitor.
6.2. Manual white Balance 
- One of R Gain / G Gain / B Gain should be kept on 80, and
others  are controlled lowering from 80 
1) Press ‘power on’ of the control R/C, set heat run to white by
pressing 
G
, and heat run over 15 minutes. (Set : RS-233
Host : PC, Baud Rate : 115200bps, Download : Cortez)
2) Zero Calibrate CA-210, and when controlling, stick the
sensor to the center of LCD module surface.
3) Double click In-start key on Controlling R/C and get in
‘white balance’.
4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times.)
5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.
* Color Temperature: Cool, Medium, Warm
1) When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80. 
2) When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
3) When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from 80.
One of R Gain / G Gain / B Gain should be kept on 80,
and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module)
7. Set information(Serial No & Model name)
(1) Setting up like bottom figure (After setting white balance,
this is set)
1) Press ADJ Key in the Adjust remocon.
2) Select  “System Control 2” by using 
D
/
E
(CH+/-) key,
and press 
A
(ENTER).
3) Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change (RS-232 Host : PC, Baud
Rate:115200bps, Download:Cortez)
(2) Bar-code scanning
1) Push the menu button in DTV mode. 
Select the STATION -> Diagnostics -> To set
2) Check the Serial Number.
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