LG 32LX3DC-UA32 / LX3DCS-UA (CHASSIS:AL-04CA) 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.
- 6 -
1. Application range
This specification is applied to AL-04CA chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
condition.
(1) Temperature: 25°C ± 5°C (CST 40°C ± 5°C)
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 100-260V, 50/60Hz)
(4) Measurement must be performed after heat-run more than
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 100-260V, 50/60Hz)
(4) Measurement must be performed after heat-run more than
15min.
(5) Adjusting standard for this chassis is followed a special
standard.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
3.General Specification
No
Item
Specification
Remark
1.
Receiving System
ATSC/ 64 & 256 QAM/NTSC-M
Slim-VSB
2.
Available Channel
VHF : 02~13
UHF : 14~69
CATV: 01~135
DTV: 02-69
3.
Input Voltage
AC 100 ~ 260V 50/60Hz
4.
Market
5.
Screen Size
32 inch wide
6.
Aspect Ratio
16:9
7.
Tuning System
FS
8.
LCD Module
LC320W01-A6K3 (1366x768)
LG Philips LCD
9.
Operating Environment
Temp. : 0 ~ 40 deg
Humidity : 10 ~ 90 %
10.
Storage Environment
Temp. : -20 ~ 50 deg
Humidity : 10 ~ 90 %
4. Feature and Function
No
Item
Specification
Remark
1.
Feature
AV Input / Out
2
Video1,2, Input, No Output
Rear1, Side1(CVBS,L,R)
RGB Input
2
Analog RGB Input / IP Card Interface
Rear2
S-Input
2
S-Input Rear1,
Side1(Y,C)
DVI Input
1
DVI Input
Rear1
Y, Pb, Pr Input
2
Component 1, 2
Rear1, Side1
SPDIF Out
1
SPDIF Out
Rear
SPDIF Input
1
SPDIF Input
Rear
RS-232C
1
S/W Download
D-Sub 9pin, Rear
1
Mono, < 2W
Remote Speaker, Rear
2.
Key
Local Key
TV/Video, Menu, OK(
), Volume(
,
),
Channel (
,
), Power (Main)
- 7 -
No
Item
Specification
Remark
3.
SETUP
EZ Scan
Auto Channel Search
CH. Edit
CH. Add/Delete
DTV Signal
Bad/Normal/Good
DTV Only
Ch. Label
CH. Logo
Main Input
DTV/Analog/Video1/Video2/Component1/
RGB-DTV <-> RGB-PC,
Component2/RGB1-DTV/RGB2-DTV/DVI-DTV
DVI-DTV <-> DVI-PC
Sub Input
DTV/Analog/Video1/Video2
Front Display
Off/On
SET ID
1 - 99
4.
Video
EZ Picture
Off/Normal/Day Light/Night Time/
Movie/Video Game/Sports
User Control
Contrast/Brightness/Color/Sharpness/Tint
XD Off/On
Color Temperature
Warm/Medium/ Cool
Video Preset
Factory Preset
5.
Audio
Audio Language
English/Spanish/French
DTV Only
EZ SoundRite
Off/On
EZ Sound
Off/Normal/Stadium/Theater/Music
User Control
Balance/Treble/Bass
Front Surround
Off/3D EchoSound System/SRS TruSurround XT
TV Speaker
Off/On
6.
Time
Auto Clock
Off/On/Time Zone
Manual Clock
Year/Data/Time
Off Timer
Off/On/Time
On Timer
Off/On/Time/Ch./Vol
Sleep Timer
Off/10 min/20 min/30 min/60 min/90 min/120
min/180 min/240 min
Auto Off
Off/On
7.
Option
Aspect Ratio
Set By Program/4:3/16:9/Horizon/Zoom1/
Zoom2/Cinema Zoom
Caption
Off/EZ Mute/On
DTV: Horizon disable
Caption Mode
CC1/CC2/CC3/CC4/Text1/Text2/Text3/Text4
Caption Option
Style/Size/Font/Text Color/Text Opacity/Bg
Color/Bg Opacity/Edge Type/Edge Color
Language
English/Espanol/Francais
Cinema
Off/On
Demo
Ez Demo/XD Demo
8.
Lock
Lock System
Off/On
Set Password
New/Confirm
Block Ch.
O
Movie Rating
G/PG/PG-13/R/NC-17/X
TV Rating-Children
Age/Fantasy Violence
TV Rating-General
Age/Dialogue/Language/Sex/Violence
Aux.Block
Video1/Video2/Component1/Component2/RGB1/RGB2/DVI
9.
Etc.
Comb Filter
3D Comb(main), 4H Comb(sub)
3D comb for main display,
4H comb for sub display
Remocon
LG code
- 8 -
5. External Input Format
Component Video Input (Y, CB/PB, CR/PR)
RGB Iinput (PC/DTV)
No
Resolution
H-freq(kHz)
V-freq.(kHz)
Pixel clock
Proposed
1.
640x480
15.73
60.00
SDTV ,DVD 480I
2.
704x480
31.47
59.94
SDTV 480P
3.
1280x720
45.00
60.00
HDTV 720P
4.
1280x720
44.96
59.94
HDTV 720P
5.
1920x1080
33.75
60.00
HDTV 1080I
6.
1920x1080
33.72
59.94
HDTV 1080I
No
Resolution
H-freq(kHz)
V-freq.(kHz)
Pixel clock
Proposed
PC
DDC
7.
640x350
31.468
70.09
25.17
EGA
O
8.
640x480
31.469
59.94
25.17
VESA(VGA)
O
9.
640x480
37.861
72.80
31.50
VESA(VGA)
O
10.
640x480
37.500
75.00
31.50
VESA(VGA)
O
11.
800x600
35.156
56.25
36.00
VESA(SVGA)
O
12.
800x600
37.879
60.31
40.00
VESA(SVGA)
O
13.
800x600
48.077
72.18
50.00
VESA(SVGA)
O
14.
800x600
46.875
75.00
49.50
VESA(SVGA)
O
15.
1024x768
48.363
60.00
65.00
VESA(XGA)
O
16.
1024x768
56.476
70.06
75.00
VESA(XGA)
O
17.
1024x768
60.023
75.02
78.75
VESA(XGA)
O
DTV
18.
704x480
31.47
59.94
SDTV 480P
19.
1280x720
45.00
60.00
HDTV 720P
20.
1280x720
44.96
59.94
HDTV 720P
21.
1920x1080
33.75
60.00
HDTV 1080I
22.
1920x1080
33.72
59.94
HDTV 1080I
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