LG 55LV5500-DD (CHASSIS:LT12E) Service Manual ▷ View online
- 5 -
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5.
5.
Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
1. Application range
This spec sheet is applied all of the 32”,42”,47”,55”,60”, 72”
LCD TV with LT12B/C/D/E/N chassis.
LCD TV with LT12B/C/D/E/N chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 ºC ± 5 ºC, CST : 40 ± 5 ºC
2) Relative Humidity: 65 ± 10 %
3) Power Voltage : Standard input voltage(100-240V~, 50/60Hz)
2) Relative Humidity: 65 ± 10 %
3) Power Voltage : Standard input voltage(100-240V~, 50/60Hz)
* Standard Voltage of each product is marked by models
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
accordance with BOM.
5) The receiver must be operated for about 20 minutes prior to
the adjustment.
3. Test method
1) Performance: LGE TV test method followed
2) Demanded other specification
2) Demanded other specification
- Safety : CE, IEC specification
- EMC: CE,IEC
- EMC: CE,IEC
- 6 -
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
- 7 -
4. General Specification(TV)
No
Item
Specification
Remark
32 wide Color Display Module
Resolution: 1920*1080
42 wide Color Display Module
Resolution: 1920*1080
47 wide Color Display Module
Resolution: 1920*1080
55 wide Color Display Module
Resolution: 1920*1080
65 wide Color Display Module
Resolution: 1920*1080
1.
Display Screen Device
72 wide Color Disp lay Module
Resolution: 1920*1080
2. Aspect Rat io 16: 9
32" TFT WUXG A LCD
42" TFT WUXG A LCD
47 TFT WUXG A LCD
55 TFT WUXG A LCD
3. LCD
M odule
42 ALEF
47 ALEF
55 ALEF
65
72 IOL
TFT
Temp. : 0 ~ 40 deg
Humidity : 0 ~ 85%
Humidity : 0 ~ 85%
ALEF
Temp. : 0 ~ 50 deg
Humidity : 20 ~ 90%
Humidity : 20 ~ 90%
4. Operating
Environment
IOL
Temp. : 0 ~ 50 deg
Humidity : 20 ~ 90%
Humidity : 20 ~ 90%
TFT
Temp. : -20 ~ 60 deg
Humidity : 10 ~ 90%
Humidity : 10 ~ 90%
ALEF
Temp. : -20 ~ 60 deg
Humidity : 10 ~ 90%
Humidity : 10 ~ 90%
5. Storage
Environment
IOL
Temp. : -20 ~ 60 deg
Humidity : 10 ~ 90%
Humidity : 10 ~ 90%
LGE SPEC
6.
Input Voltage
A C100 ~ 240V, 50/60Hz
32 50
W
Normal : LC320EUN-SDV 2 [32LV3700-DA]
42 90
W
Normal : LC420EUN-SDV 3 [42LV3700-DA]
FHD
60Hz
Edge LED
60Hz
Edge LED
47 90
W
Normal : LC470EUE-SDV1 [37LV3700-DA]
100 W
Normal : V315H3-LE8 [32LV 5500-DD]
60 W
Normal : LC320EUD-SDA 1 [32LV5500-DD]
32
60 W
PG : LC320EUD-SDF1 [32LW5700-DA ]
110 W
Normal : V420H2-LE6 [42LV 5500-DD]
90
100
110
W
Normal : LC420EUF-SDA1 [42LV5500-DD]
42
100 W
W
W
PG : LC420EUF-SDF1 [42LW5700-DA ]
Normal : LC470EUF-SDA1 [47LV5500-DD]
47
PG : LC470EUF-SDF1 [47LW5700-DA ]
FHD
120Hz
Edge LED
120Hz
Edge LED
55 14 0
W Normal : LC550EUF-SDA1 [55LV5500-DD]
42
110
W
SG : LC420DUC-SDS1 [42LW7700-DA]
47
160
W
SG : LC470DUC-SDS1 [47LW7700-DA]
7.
Power Consumption
= LCD(M odule) +
Backlight(LE D)
= LCD(M odule) +
Backlight(LE D)
FHD
M240Hz
ALEF
M240Hz
ALEF
55
170
W
SG : LC550DUC- SDS1 [55LW 7700-DA ]
47
30
W
SG : LC470DUT-SDA1 Only Cell
FHD
T480Hz
ALEF
T480Hz
ALEF
55
30
W
SG : LC550DUT-SDA1 Only Cell
65
FHD
T480Hz
IOL
T480Hz
IOL
72
400
W
SG : LC720DUC-SCM1 Only Cell
- 8 -
Maker Inch (H)mm
x (V)mm x (D)mm
Unit: mm
735.4 x 433.0 x 10.8
LC320EUN-SDV 2 : Edge Non-3D_60Hz
735.4 x 433.0 x 10.8
LC320EUD-SDA 1 : Edge Non-3D_120Hz
32
698.40 x 392.85 x 10.8
LC320EUD-SDF1 : Edge 3D-PG
968.4 x 564 x 10.8
LC420EUN-SDV 3: Edge Non-3D_60Hz
968.4 x 564 x 10.8
LC420EUF-SDA 1 : Edge Non-3D_120Hz
968.4 x 564 x 10.8
LC420EUF-SDF1 : Edge 3D-PG
42
968.4 x 564 x 12.2
LC420DUC-SDS1 : ALEF 3D-SG M240
1078.6 x 626.0 x 10.8
LC470EUE-SDV 1 : Edge Non-3D_60Hz
1078.6 x 626.0 x 10.8
LC470EUF-SDA 1 : Edge Non-3D_120Hz
1078.6 x 626.0 x 10.8
LC470EUF-SDF1 : Edge 3D-PG
1078.6 x 626.0 x 12.2
LC470DUC-SDS1 : ALEF 3D-SG M240
47
1054.5 x 600.0 x 1.8
LC470DUT- SDA1 : A LEF 3D-SG T480
1255.6 x 726.4 x 19.0
LC550EUF-SDA 1 : Edge Non-3D_120Hz
1255.6 x 726.4 x 12.2
LC550DUC- SDS1 : ALEF 3D-SG M240
55
1220.8 x 693.8 x 1.8
LC550DUT- SDA1 : A LEF 3D-SG T480
65
LGD
72
1666.0 x 968.0 x 60.0
LC720DUC-SCM1 : IOL 3D-SG
32
735.4 x 433 x 10.8
V 315H3-LE8 : Edge Non-3D
Size
CMI
42
968.4 x 564 x 10.8
V 420H2-LE6 : Edge Non-3D
Maker
Inch mm
x
mm
mm
LC320EUN-SDV 2 : Edge Non-3D_60Hz
LC320EUD-SDA 1 : Edge Non-3D_120Hz
8. LCD
M odule
Pixe l Pitch
LGD
32
0.36375 x 0.36375
LC320EUD-SDF1 : Edge 3D-PG
LC420EUN-SDV 3: Edge Non-3D_60Hz
LC420EUF-SDA 1 : Edge Non-3D_120Hz
LC420EUF-SDF1 : Edge 3D-PG
42
0.4845 x 0.4845
LC420DUC-SDS1 : ALEF 3D-SG M240
LC470EUE-SDV 1 : Edge Non-3D_60Hz
LC470EUF-SDA 1 : Edge Non-3D_120Hz
LC470EUF-SDF1 : Edge 3D-PG
LC470DUC-SDS1 : ALEF 3D-SG M240
47
0.5415 x 0.5415
LC470DUT- SDA1 : A LEF 3D-SG T480
LC550EUF-SDA 1 : Edge Non-3D
LC550DUC- SDS1 : ALEF 3D-SG M240
55
0.630 x 0.630
LC550DUT- SDA1 : A LEF 3D-SG T480
65
72
0.831 x 0.831
LC720DUC-SCM1 : IOL 3D-SG
32
0.12125 x 0.12125
V 315H3-LE8 : Edge Non-3D
CMI
42
0.1615 x 0.4845
V 420H2-LE6 : Edge Non-3D
32 Ed ge-LED
LC320EUN-SDV 2
LC320EUD-SDA 1
LC320EUD-SDF1
LC320EUD-SDF1
Edge-LED
LC420EUN-SDV 3
LC420EUF-SDA 1
LC420EUF-SDF1
LC420EUF-SDF1
42
ALEF
LC420DUC-SDS1
Edge-LED
LC470EUE-SDV 1
LC470EUF-SDA 1
LC470EUF-SDF1
LC470EUF-SDF1
47
ALEF
LC470DUC-SDS1
LC470DUC-SDS1
Edge-LED
LC550EUF-SDA 1
55
ALEF
LC550DUC-
SDS1
LC550DUT- SDA1
Back Light
LGD
65
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