LG MF-056C, 42PX2RVA-ZC, 42PX2RVA Service Manual
PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MF-056C
MODEL : 42PX2RVA
42PX2RVA-ZC
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
- 2 -
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS .........................................................................4
SPECIFICATIONS ...............................................................................................8
ADJUSTMENT INSTRUCTIONS ......................................................................10
TROUBLE SHOOTING GUIDE..........................................................................14
BLOCK DIAGRAM.............................................................................................23
EXPLODED VIEW..............................................................................................24
EXPLODED VIEW PARTS LIST........................................................................25
REPLACEMENT PARTS LIST...........................................................................26
SCHEMATIC DIAGRAM ........................................................................................
PRINTED CIRCUIT BOARD ..................................................................................
- 3 -
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in
the Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to
prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during
the servicing of a receiver whose chassis is not isolated from
the AC power line. Use a transformer of adequate power rating
as this protects the technician from accidents resulting in
personal injury from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace
it with the specified.
When replacing a high wattage resistor (Oxide Metal Film
Resistor, over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source,
connect an electrical jumper across the two AC plug prongs.
Place the AC switch in the on position, connect one lead of
ohm-meter to the AC plug prongs tied together and touch other
ohm-meter lead in turn to each exposed metallic parts such as
antenna terminals, phone jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC
voltmeter with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC
voltage measurements for each exposed metallic part. Any
voltage measured must not exceed 0.75 volt RMS which is
corresponds to 0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF
- When using the remote control aim it at the remote control sensor of the set.
- There's maybe a defect in consecutive operation of remote control in specified brightness according to this set feature.
POWERMUTE
TV/AV I/II
LIST
PR
PR
VOL
OK
1 2 3
4 5 6
7 8 9
PSM SSM
0
VOL
ARC MENU
Q.VIEW TEXT SLEEP
TIME
MIX
HOLD
REVEAL
INDEX
MODE
?
i
M
MULTIMEDIA
SIZE
UPDATE
MULTIMEDIA
Selects the Component, RGB or
HDMI
modes.
switches the set on from standby.
POWER
switches the set on from standby or
off to standby.
ARC
Changes the picture format.
MENU
Displays on screen menus one by
one.
Exits the current menu.
Memorizes menu changes.
Q.VIEW
Returns to the previously viewed pro-
gramme.
Note : This function works only when
Favourite programme is set to Off.
Otherwise each press of this button
will select a stored favorite pro-
gramme.
SSM
To select the sound appropriate to
your viewing programme character.
NUMBER buttons
SLEEP
Sets the sleep timer.
I/II
Selects the language during dual language broadcast.
Selects the sound output.
TEXT
These buttons are used for teletext.
For further details, see the ‘Teletext’
section.
COLOURED BUTTONS
These buttons are used for teletext (only
TELETEXT models) or programme edit.
LIST
Displays the programme table.
TV/AV
Selects the TV, AV, Component, RGB
or
HDMI
modes.
switches the set on from standby.
MUTE
Switches the sound on or off.
DD/ EE
(Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
FF/ GG
(Volume Up/Down)
adjusts the volume.
adjusts menu settings.
OK
accepts your selection or displays the
current mode.
PSM
Adjusts the factory preset picture
according to the room.
- 4 -
DESCRIPTION OF CONTROLS
- 5 -
<Front Panel Controls>
ON/OFF
TV/AV MENU VOL PR
Main Power Button
Remote Control Sensor
TV/AV Button
Selects the TV, AV, Component,
RGB or DVI modes. If OSD is displayed, selects menu item.
MENU
Displays on screen menus one by one.
Exits the current menu.
Memorizes menu changes.
DD/ EE
(Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
FF/ GG
(Volume Up/Down)
adjusts the volume.
adjusts menu settings.
Power Standby Indicator
Illuminates red in standby
mode, Illuminates green
when the set is turned on
- 6 -
<Back Panel>
S-VIDEO
VIDEOAUDIOR
L/MONO
AAV5V5
AC INPUT
RS-232C INPUT
(CONTROL/SERVICE)
Antenna
REMOTE
CONTROL
HDMI
AUDIO INPUT
RGB INPUT
(MONO)(MONO)
COMPONENTCOMPONENT
LL RR
AUDIOAUDIO
LL RR
AUDIOAUDIO
AAV4V4
V VARIABLE ARIABLE
AUDIO OUTAUDIO OUT
AAV1V1
AAV2V2
AAV3V3
S-VIDEOS-VIDEO VIDEOVIDEO
LL RR
AUDIOAUDIO
1. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUT
Connect the monitor output socket of the PERSONAL COMPUTER, DVD or STB to this socket.
Note: If you want to use RGB/DVI audio, we strongly recommend that you use the cable that has a core, or the EMI Filter
core along with separate cable.
2. REMOTE CONTROL
3. RS-232C INPUT(CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC.
4. COMPONENT INPUT
Connect DVD video outputs to Y, PB, PR of COMPONENT
INPUT and audio outputs to Audio sockets of AUDIO INPUT.
AUDIO/VIDEO IN SOCKETS (AV4)
Connect the audio/video out sockets of external equipment to
these sockets.
S-VIDEO/AUDIO IN SOCKETS
Connect the S-VIDEO out socket of an VCR to the S-VIDEO
socket.
Connect the audio out sockets of the VCR to the audio sockets as in AV4.
5. VARIABLE AUDIO OUTPUT
6. EURO SCART SOCKET
Connect the euro scart socket of the VCR to these sockets.
Note:
a. If you want to use the EURO scart cable, you have to use
the signal shielded Euro scart cable.
b.
If the S-VIDEO(Y/C) signal is received through the Euro scart
socket 2 (AV 2), you must change to the
S-Video 2
(Y/C) mode.
7. ANTENNA INPUT
8. POWER CORD SOCKET
This set operates on an AC power. The voltage is indicated on
the Specifications page. Never attempt to operate the set on
DC power.
9. AUDIO/VIDEO INPUT (AV5)
S-VIDEO/AUDIO IN SOCKETS
1
42 3 6 75 8
9
- 7 -
AS mark
LG TV
Owner’s Manual
1.5V
1.5V
Alkaline batteries
Power Cord
POWERMUTE
TV/AV I/II
LIST
PR
PR
VOL
OK
1 2 3
4 5 6
7 8 9
PSM SSM
0
VOL
ARC MENU
Q.VIEW TEXTSLEEP
TIME
MIX
HOLD
REVEAL
INDEX
MODE
?
i
M
MULTIMEDIA
SIZE
UPDATE
Remote Control handset
- Optional extras can be changed or modified for quality improvement without any notification new optional extras can be
added.
- Contract your dealer for buying these items.
Optional Extras
Accessories
Accessories
Tilt wall mounting bracket
Video cables Audio cables
Ceiling mounting bracket
40
42
50
42
40
- Secure the set assembly by joinning it to a wall by using the Eye Bolts/Wall brackets.
Joinning the set assembly to the wall to protect the set tumbling
• After the set must be mounted on a desktop, install the Eye Bolts on the set as
shown.
Insert the 2 Eye Bolts and tighten securely, in the holes on the bracket.
Install the wall brackets on the wall with 2 bolts, (not supplied with the product),
as shown.
Match the height of the Eye Bolts and the wall brackets.
Check to be sure the brackets are tightened securely.
• Secure the set assembly to the wall with strong strings or wound wire cables,
(not supplied with the product), as shown.
2-Wall brackets
2-Eye Bolts
Accessories
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement
.
- 8 -
V Application Range
This spec is applied to the 42”PDP TV used MF-056C Chassis.
V Specification
Each part is tested as below without special appointment.
1) Temperature : 25±5°C (77±9°F), CST : 40±5
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.
5)
The receiver must be operated for about 20 minutes prior to the adjustment
.
V Test Method
1) Performance : LGE TV test method followed.
2) Demanded other specification
Safety: CE, IEC specification
EMC : CE, IEC
V General Specification
1. Module Specification
Remark
Safety : IEC/EN60065, EMI : EN55013, EMS : EN55020
Model Name
42PX2RVA-ZC
Market
EU
Remark
PDP
LGE SPEC
Maker : SONY/ Sanken
Specification
42 inch wide Color Display Module
16:9
PDP42V7xxxx
RGB Closed Type, Film Filter
1) Temp : 0~40 deg
2) Humidity : 0~85%
1) Temp : -20~60 deg
2) Humidity : 0~85%
100-240V~, 50/60Hz
No
1
2
3
4
5
6
Item
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
2. Model Specification
- 9 -
Item
Market
Broadcasting system
Available channel
Receiving system
Scart Jack(3EA)
Video input(2EA)
S-Video Input(2EA)
Component Input(2EA)
RGB Input(1EA)
HDMI Input(1EA)
Audio Input(4EA)
Audio Output(1EA)
Wired Control
No
1
2
3
4
5
6
7
8
9
10
11
12
13
Specification
EU
PAL B/G/I/D/K, SECAM L/L’
BRAND PAL SECAM
VHF/UHF C1~C69
CATV S1~S47
Upper Heterodyne
PAL, SECAM
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
RGB-DTV
HDMI-PC
HDMI-DTV
PC Audio(1EA), Component, AV(2EA)
Variable Audio Out
Discrete IR
Remark
4 System : PAL, SECAM, NTSC,PAL60
4 System : PAL, SECAM, NTSC,PAL60
L/R Input
L/R Output
- 10 -
ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions apply to the MF-056C Chassis.
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 protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25±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 100-220V,
50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
O After RGB Full white HEAT-RUN Mode, the receiver must
be operated prior to adjustment.
O Enter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment.
2) OSD display and screen display 100% full WHITE
PATTERN.
[ Set is activated HEAT-RUN without signal generator in
this mode.
[ Single color pattern(RED/BLUE/GREEN) of HEAT-RUN
mode uses to check PANEL.
Caution) If you turn on a still screen more than 20 minutes
(Especially digital pattern, cross hatch pattern), after
image may be occur in the black level part of the
screen.
3. Channel memory
3-1. Setting up the LGIDS
1) Install the LGIDS. (idsinst.exe)
2) After installation, restart your PC.
3) Extract [files.zip] to folder [c:\LGIDS\files].
4) Start LGIDS.
3-2. Channel memory Method
1) Select “PDP” and “Hurricane” on Model dialog. And check
your connection in Communication dialog. (If your
connection is ‘NG’, then set your PORT(COM1,2,3,...)
correctly.)
2) Connect RS-232C cable and turn on the power.
(If your connection has completed, you can see “Ready”.)
[ If your set is not an end products but only a board, you
have to make your board to Stand-by state (LED_R). And
you have to Download in Stand_by power state.
3) Select proper CH_memory file(*.nvm) for each model at
[NVRAM Download]
$ [Write Batch]
Next, select proper binary file(*.bin) including the CH
information for each model at [NVRAM File].
4) Click the [Download] button.
It means the completion of the CH memory download if all
items show ‘OK’ and Status is changed by ‘PASS’ at the
lower right corner of the window.
5) If you want to check whether the CH information is
memorized correctly or not, click the [Verify] button.
And then compare NVRAM File(*.bin) with the CH
information downloaded.
(Fig. 1)
(Fig. 2)
(Fig. 3)
- 11 -
4. POWER PCB Assy Voltage
Adjustments
(Va, Vs Voltage Adjustments)
4-1. Test Equipment :D.M.M. 1EA
4-2. Adjustment Method
[P/No 3501V00220A(Sanken) B/D,
P/No 6709V00010A(LGIT) B/D]
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P807, connect
- terminal to GND pin of P807.
3) After turning RV501, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P807, connect
– terminal to GND pin of P807.
2) After turning RV401, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
5. EDID (The Extended Display
Identification Data)/ DDC (Display
Data Channel) download
5-1. Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.(S/W : EDID
TESTER Ver.2.5)
2) A Jig for EDID Download
3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
5-2. Setting of device
5.3. Preparation for Adjustment
1) As above Fig. 5, Connect the Set, EDID Download Jig, PC
& Cable.
2) Turn on the PC & EDID Download Jig. And Execute the
S/W : EDID TESTER Ver,2.5
3) Set up S/W option
Repeat Number : 5
Device Address : A0
PageByte : 8
4) Power on the Set
5.4. Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data
2) Load the EDID data.(Open File)
[Analog-RGB : TYPE_VGA.ANA]
[Digital(HDMI) : TYPE_VGA.DVI]
3) Set the S/W as below.
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig. 4) Connection diagram of power adjustment for measuring
(Fig. 5) Connection Diagram of DDC download
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