LG 32LC7D (CHASSIS:LB73A) Service Manual ▷ View online
- 9 -
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied to all of the 32" LCD TV,
LB73A Chassis
LB73A Chassis
2. Notes
(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 equipment.
transformer will help protect test equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of
(3) The adjustments must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
there is no specific designation.
(4) The input voltage of the receiver be must kept 220V~,
60Hz when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
* Perform preliminary operation after receiving White Pattern.
* White Pattern entry method
* White Pattern entry method
- Turn the power on.
- 100% FULL WHITE PATTERN appears if pressing the
- 100% FULL WHITE PATTERN appears if pressing the
Power on key of adjustment remote control.
* Set is activated HEAT RUN without signal generator in this
mode.
Notice) If you turn on a still screen more than 20 minutes
(Especially Digital pattern, Cross Hatch Pattern), an
afterimage may occur in the black level part of the screen.
(Especially Digital pattern, Cross Hatch Pattern), an
afterimage may occur in the black level part of the screen.
3. EPLD Download
(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click
‘program icon’.
(5) End after confirming.
4. MST3361M-Set Adjustment
4-1. Synopsis
MST3362M-Set adjustment to set the black level and the Gain
of optimum with an automatic movement from the analog =>
digital converter.
of optimum with an automatic movement from the analog =>
digital converter.
4-2. Test Equipment
Service R/C, MSPG-925 Pattern Generator
(480i, 1080i 60Hz Color Bar Pattern output will be possible
and the output level will accurately have to be revised with
0.7±0.1V
(480i, 1080i 60Hz Color Bar Pattern output will be possible
and the output level will accurately have to be revised with
0.7±0.1V
P-P
)
4-3. Adjustment
(1) How to adjustment the Component1
1) Select Component1 as the input with Color Bar Pattern
in 480i 60Hz mode and select ‘Component1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘1. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.
and select the ‘1. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.
3) When the adjustment is over, 'Component1 Adjustment
OK’ is displayed. If the adjustment has errors,
'Component1 Adjustment Failed! Try Again!’ is
displayed.
'Component1 Adjustment Failed! Try Again!’ is
displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the Component2, RGB
1) Select Component2, RGB-DTV as the input with Color
Bar Pattern in 1080i 60Hz mode and select
‘Component2’ on screen.
‘Component2’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘2. ADC 1080i Comp2/RGB’. Pressing
the Vol+ Key to adjust the component2.
and select the ‘2. ADC 1080i Comp2/RGB’. Pressing
the Vol+ Key to adjust the component2.
3) When the adjustment is over, 'Component2 Adjustment
OK’ is displayed. If the adjustment has errors,
'Component2 Adjustment Failed! Try Again!’ is
displayed. and If the adjustment has errors, 'RGB
Adjustment Failed! Try Again!’ is displayed.
'Component2 Adjustment Failed! Try Again!’ is
displayed. and If the adjustment has errors, 'RGB
Adjustment Failed! Try Again!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
5. Video(uPD)-Set adjustment
5-1. Synopsis
This is a adjustment to reduce the color difference of video
signal Main/Sub Display.
signal Main/Sub Display.
5-2. Required Equipment
Service R/C, MSPG-925 Pattern Generator.
LCD TV SET
<Fig. 1> Connection Diagram of CPLD Download
(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern
5-3. Adjustment
(1) How to adjustment the uPD PAL
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in PAL mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘3. uPD PAL(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD PAL.
and select the ‘3. uPD PAL(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD PAL.
3) When the adjustment is over, 'uPD64015 PAL Main
Adjustment OK’ and ‘uPD64015 PAL Sub Adjustment
OK’ is displayed. If the adjustment has errors,
'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main
Error!’ is displayed.
OK’ is displayed. If the adjustment has errors,
'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main
Error!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the uPD NTSC
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in NTSC mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘4. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.
and select the ‘4. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.
3) When the adjustment is over, 'uPD64015 NTSC Main
Adjustment OK’ and ‘uPD64015 NTSC Sub Adjustment
OK’ is displayed. If the adjustment has errors,
'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC
Main Error!’ is displayed.
OK’ is displayed. If the adjustment has errors,
'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC
Main Error!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
6. EDID
(The Extended Display Identification Data)
/DDC
(Display Data Channel)
Download
This is the function that enables “Plug and Play".
6-1. Required Test Equipment
(1) PC, Jig for adjusting DDC.
(PC serial to D-sub Connection equipment)
(2) DVI to HDMI Connector.
6-2. Setting of Device
6-3. EDID DATA
(1) EDID DATA PORT1 for HDMI
(2) EDID DATA PORT2 for HDMI
(3) EDID DATA for RGB
- 10 -
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 25 4E 00 31 40 45 40 61 40 D1 C0 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 18 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 97
20 09 48 4C 25 4E 00 31 40 45 40 61 40 D1 C0 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 18 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 97
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93
10 14 07 16 23 15 07 50 65 03 0C 00 10 00 01 1D 00
20 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
30 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
40 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
50 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
60 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
70 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 CC
20 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
30 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
40 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
50 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
60 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
70 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 CC
Analog EDID
D-sub to D0sub
HDMI EDID
DVI-D to HDMI or HDMI to HDMI
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 25 4E 00 31 40 45 40 61 40 D1 C0 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 18 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 97
20 09 48 4C 25 4E 00 31 40 45 40 61 40 D1 C0 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 18 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 97
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93
10 14 07 16 23 15 07 50 65 03 0C 00 20 00 01 1D 00
20 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
30 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
40 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
50 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
60 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
70 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 BC
20 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
30 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
40 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
50 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
60 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
70 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 BC
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 0E 10 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 25 4E 00 D1 C0 01 01 01 01 01 01 01 01
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30
50 40 80 37 00 C4 8E 21 00 00 1C 00 00 00 FD 00 38
60 4B 1F 44 0A 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 77
20 09 48 4C 25 4E 00 D1 C0 01 01 01 01 01 01 01 01
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30
50 40 80 37 00 C4 8E 21 00 00 1C 00 00 00 FD 00 38
60 4B 1F 44 0A 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 77
- 11 -
7. Adjustment of White Balance
7-1. Required Equipment
(1) Color analyzer (CA-210 or similar product)
(2) Automatic adjustor (with automatic adjustment hour
(2) Automatic adjustor (with automatic adjustment hour
necessity and the RS-232C communication being possible)
7-2. Connection Diagram of Equipment
for Measuring
(Automatic Adjustment)
7-3. Process of automatic adjustment
(1) As using the white pattern for adjustment the inner part,
HDMI connection need not. But as lower part, the RS-232C
Command is used.
Wb 00 00 start of automatic adjustment the white balance.
Wb 00 10 Start of gain adjustment.(inside pattern)
Ja 00 ff
Wb 00 10 Start of gain adjustment.(inside pattern)
Ja 00 ff
Adjustment Date.
Jb 00 c0
...
Wb 00 1f Ending gain adjustment.
As occasion demands , adjust the offset.
( Wb 00 20(Start) , Wb 00 2f(end))
...
Wb 00 1f Ending gain adjustment.
As occasion demands , adjust the offset.
( Wb 00 20(Start) , Wb 00 2f(end))
Caution) When you adjust automatically, RS-232C
Command is used.
* Baud Rate : 115200
Command is used.
* Baud Rate : 115200
[ RS-232C Command
(Automatic Adjustment)
- Operate the automatic adjustment by using ‘power only’ key
on service remote control. And set the Baud Rate to 115200.
- It must start to “wb 00 00”, complete to “wb 00 ff”.
- Adjust offset.
- Adjust offset.
7-4. Adjustment of White Balance
(Passivity Adjustment)
O
Operate Zero Calibration of the CA-210.
O
Manual adjustment is also possible by the following sequence.
(1) Enter to ‘7. White-Balance’ by pressing the ADJ key on the
service remote control.
(2) Select Test Pattern White with ADJ key and HEAT RUN at
least 15 minutes.
(3) Select picture control condition to ‘Dynamic’.
Stick the sensor on center of screen. And select ‘6.White-
Balance of ‘Ez- Adjust’ with ADJ key on service remote
control and Enter to adjustment mode by pressing right
key(
Balance of ‘Ez- Adjust’ with ADJ key on service remote
control and Enter to adjustment mode by pressing right
key(
G
).
(4) Adjust with Volume ± key.
- Value of bright : High Level -> 216gray
[Cool]
Color coordinates : X; 0.272±0.015 Y; 0.278±0.015
Color temperature: 12000°K ±1000°K
dUV: ±0dUV
Color coordinates : X; 0.272±0.015 Y; 0.278±0.015
Color temperature: 12000°K ±1000°K
dUV: ±0dUV
[Medium]
Color coordinates : X; 0.285±0.015 Y; 0.293±0.015
Color temperature: 9300°K±1000°K
dUV: ±0dUV
Color coordinates : X; 0.285±0.015 Y; 0.293±0.015
Color temperature: 9300°K±1000°K
dUV: ±0dUV
[Warm]
Color coordinates : X; 0.313±0.015 Y; 0.329±0.015
Color temperature: 6500°K±1000°K
dUV: ±3dUV
Color coordinates : X; 0.313±0.015 Y; 0.329±0.015
Color temperature: 6500°K±1000°K
dUV: ±3dUV
(5) After adjustment is completed, move to ‘Ez-Adjust’ by
pressing
A
key exit the adjustment mode by pressing the
ADJ key.
216 FULL WHITE
MSPG-925 series
Window
COLOR
ANALYZER
TYPE; CA-210
HDMI signal input
LCD TV part
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
CENTER
(DEFAULT)(Hex)
00
00
00
FE
FE
FE
7f
7f
7f
Min
Max
C0
C0
C0
3F
40
40
Cool
C0
C0
C0
3F
40
40
Mid
C0
C0
C0
3F
41
41
Warm
RS-232C COMMAND
[CMD ID DATA]
jg
jh
ji
Cool
ja
jb
jc
Mid
jd
je
jf
Warm
- 12 -
TROUBLESHOOTING
1. Power Board
1-1. The whole flowchart which it follows in voltage output state
Start check
Manufacture enterprise
meaning of a passage
1. Check the Power Off
condition.
Doesn't the
screen whole come
out?
Is it identical
with Power Off
condition?
Yes
Yes
No
No
No
No
No
2. Check the Interface
signal condition.
Is the Interface
signal operated?
Yes
3. Check the St-by 5V
signal circuit.
Doesn't the
low pressure output
come out?
Doesn't the
St-by 5V signal
come out?
Yes
Yes
No
4. Check the 5V Monitor
signal circuit.
Doesn't the
5V Monitor signal
come out?
Yes
7. Check the VSC Vs-ON
signal
Doesn't the
high tension output
come out?
Doesn't the
VSC signal Vs-ON
come out?
Yes
Yes
Does
high tension
output voltage Drop
occur?
When the
Y B/D Module
input connector is
removed, does output
voltage drop
occur?
When the
Y, Z B/D Module
input connector is remove,
does Power Board high tension
output voltage Drop
occur?
Yes
No
No
9. Check the Power
Board Output high
tension circuit
Yes
10. Check the Z B/D
Module output circuit
Yes
When the
Z B/D Module
input connector is
removed, does output
voltage Drop
occurs?
11. Check the Y B/D
Module output circuit
Yes
No
8. Check the Vs, Va
voltage output circuit.
Doesn't the
Vs, Va voltage output
come out?
Yes
No
No
5. Check the VSC RL-ON
signal.
Doesn't the
VSC signal RL-ON
come out?
Yes
6. Check the VSC low
pressure output
Doesn't the
VSC low pressure
output come
out?
Yes
Click on the first or last page to see other 32LC7D (CHASSIS:LB73A) service manuals if exist.