LG 42LP860H (CHASSIS:LD33B) Service Manual ▷ View online
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IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the cir-
cuit 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 prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
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 possible to the component body.
2. Bend into a "U" shape the end of each of three leads remain-
ing on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
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.
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
board.
4. Insert new transistor in the circuit board.
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 pos-
sible 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. 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.
Fuse and Conventional Resistor
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.
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 when-
ever 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 connec-
tions).
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.
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.
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.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly con-
nected 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.
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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range
This specification is applied to the LED TV used LD3BF
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4) Specification and performance of each parts are followed
each drawing and specification by part number in
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
- Safety : CE, IEC specification
- EMC : CE, IEC
4. Model General Specification
No.
Item
Specification
Remarks
1
Market
EU(PAL Market-37Countries)
DTV (MPEG2/4, DVB-T) : 37 countries
(Albania/Austria/Belarus/Belgium/Bosnia/Bulgaria/Croatia/
Czech/Denmark/Estonia/Finland/France/Germany/Greece/
Hungary/Ireland/Italy/Kazakhstan/Latvia/Lithuania/Lux-
embourg/Morocco/Netherlands/Norway/Poland/Portugal/
Romania/Russia/Serbia/Slovakia/Slovenia/Spain/Sweden/
Switzerland/Turkey/UK/Ukraine)
DTV (MPEG2/4, DVB-C): 37 countries
(Albania/Austria/Belarus/Belgium/Bosnia/Bulgaria/Croatia/
Czech/Denmark/Estonia/Finland/France/Germany/Greece/
Hungary/Ireland/Italy/Kazakhstan/Latvia/Lithuania/Lux-
embourg/Morocco/Netherlands/Norway/Poland/Portugal/
Romania/Russia/Serbia/Slovakia/Slovenia/Spain/Sweden/
Switzerland/Turkey/UK/Ukraine)
2
Broadcasting system
1) PAL-BG
2) PAL-DK
3) PAL-I/I’
4) SECAM-L/L', DK , BG, I
5) DVB-T
6) DVB-C
Analogue
VHF : E2 to E12, UHF : E21 to E69,
CATV : S1 to S20, HYPER : S21 to S47
Digital
VHF
UHF
3
Receiving system
Analog : Upper Heterodyne
Digital : COFDM, QAM
► DVB-T
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32
- Modulation : Code Rate
QPSK : 1/2, 2/3, 3/4, 5/6, 7/8
16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
► DVB-C
- Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s
- Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM
- 7 -
No.
Item
Specification
Remarks
4
Scart (1EA)
PAL, SECAM
Scart 1 Jack is Full scart and support ATV/DTV-OUT
(not support DTV Auto AV)
5
Head phone out
Antenna, AV1, AV2, Component,
HDMI1, HDMI2, HDMI3, USB1, USB2,
USB3
6
CLOCK
CLOCK
Interface : (D-SUB 15PIN)
7
HDMI Input (3EA)
HDMI1-DTV
HDMI2-DTV
HDMI3-DTV
HDMI version 1.4
Support HDCP
8
SDPIF out (1EA)
SPDIF out
9
USB (2EA)
EMF, DivX HD, For SVC (download)
JPEG, MP3, DivX HD
10
Ethernet Connect(2EA)
Ethernet Connect
WOL/WOWLAN Support
11
Ext. Speaker out (1EA)
Ext. Speaker out
Stereo 1 W / 8 Ω, Fix, Variable, Line Out
12
Ext.Volume control(1EA)
Ext. volume control
13
RS-232C
SVC, Control, Power outlet
(Selectable 12V/1A or 5V/2A)
14
Audio Input (1EA)
AV
L/R Input
5. HDMI input (DTV mode)
No.
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel clock
Remarks
1.
720*480
31.469 / 31.5
59.94 / 60
SDTV 480P
LP860H-ZA not support
HDMI PC mode but can
display PC input
2.
720*576
31.25
50
SDTV 576P
3.
1280*720
37.500
50
HDTV 720P
4.
1280*720
44.96 / 45
59.94 / 60
HDTV 720P
5.
1920*1080
33.72 / 33.75
59.94 / 60
HDTV 1080I
6.
1920*1080
28.125
50.00
HDTV 1080I
7.
1920*1080
26.97 / 27
23.97 / 24
HDTV 1080P
8.
1920*1080
33.716 / 33.75
29.976 / 30.00
HDTV 1080P
9.
1920*1080
56.250
50
HDTV 1080P
10.
1920*1080
67.43 / 67.5
59.94 / 60
HDTV 1080P
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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED LCD TV
with LD3BF 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 °C ± 5 °C 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~, 50/60 Hz.
(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. MAC address D/L , CI+ key D/L, Widevine
key D/L, ESN D/L
Connect: USB port
Communication Prot connection
▪ Com 1,2,3,4 and 115200(Baudrate)
Mode check: Online Only
▪ Check the test process: DETECT -> MAC -> CI -> Widevine
-> ESN
▪ Play: Press Enter key
▪ Result: Ready, Test, OK or NG
▪ Printer Out (MAC Address Label)
3.2. LAN Inspection
3.2.1. Equipment & Condition
▪ Each other connection to LAN Port of IP Hub and Jig
3.2.2. LAN inspection solution
▪ LAN Port connection with PCB
▪ Setting automatic IP
▪ If you want manual connection, Instart->menu->Network
Setup->Network Setting->Press OK
Press Wired or Wireless connection key, then Network will
be connected.
▪ Setting state confirmation
- If automatic setting is finished, you confirm IP and MAC
Address at ‘in start’ menu mode.
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