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PLASMA TV
SERVICE MANUAL
CHASSIS : PB61A
MODEL : 42PC1DV
42PC1DV-AA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SAFETY PRECAUTIONS ....................................................................................3
DESCRIPTION OF CONTROLS ..........................................................................4
SPECIFICATIONS ..............................................................................................10
ADJUSTMENT INSTRUCTIONS .......................................................................12
TROUBLE SHOOTING GUIDE ..........................................................................17
PRINTED CIRCUIT DIAGRAM ..........................................................................23
BLOCK DIAGRAM .............................................................................................27
EXPLODED VIEW ..............................................................................................30
EXPLODED VIEW PARTS LIST ........................................................................31
REPLACEMENT PARTS LIST...........................................................................32
SCHEMATIC DIAGRAM.........................................................................................
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
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 Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during Do not use a line Isolation Transformer during this check.
the servicing of a receiver whose chassis is not isolated from Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
the AC power line. Use a transformer of adequate power rating between a known good earth ground (Water Pipe, Conduit, etc.)
as this protects the technician from accidents resulting in and the exposed metallic parts.
personal injury from electrical shocks. Measure the AC voltage across the resistor using AC
voltmeter with 1000 ohms/volt or more sensitivity.
It will also protect the receiver and it's components from being Reverse plug the AC cord into the AC outlet and repeat AC
damaged by accidental shorts of the circuitry that may be voltage measurements for each exposed metallic part. Any
inadvertently introduced during the service operation. voltage measured must not exceed 0.75 volt RMS which is
corresponds to 0.5mA.
If any fuse (or Fusible Resistor) in this monitor is blown, replace In case any measurement is out of the limits specified, there is
it with the specified. possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
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. Leakage Current Hot Check circuit
Due to high vacuum and large surface area of picture tube,
AC Volt-meter
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.
Good Earth Ground
such as WATER PIPE,
Leakage Current Cold Check(Antenna Cold Check) To Instrument's CONDUIT etc.
With the instrument AC plug removed from AC source, 0.15uF
exposed
connect an electrical jumper across the two AC plug prongs. METALLIC PARTS
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 1.5 Kohm/10W
antenna terminals, phone jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1M and 5.2M.
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.
DESCRIPTION OF CONTROLS
D/A INPUT Selects digital or analogue mode.
(Digital TV / INPUT
Analogue TV) D/A POWER TV
INPUT External input modes rotate in regular sequence: INPUT DVD
Digital, Analogue, AV1-2, Component 1-2, RGB-
DTV (or RGB-PC), HDMI/DVI. ARC VCR
1 TEXT PIP GUIDE INFO
POWER Switches the set between ON and STANDBY.
ARC Selects your desired picture format.
+/- Adjusts brightness on screen.
It returns to the default settings brightness by
changing mode source. LIST I/II
MENU
EXIT SLEEP
VCR/DVD Control some video cassette recorders or DVD players
control buttons ("RECORD" button is not available for DVD player).
OK
OK Accepts your selection or displays the current
mode.
THUMBSTICK Adjusts menu settings.
(Up/Down/Left Selects menu item.
Right/OK)
Q.VIEW
VOL PR
VOLUME +/- Increase/decrease the sound level.
MUTE
Q.VIEW Returns to the previously viewed programme.
1 2 3
MUTE Switches the sound on or off.
4 5 6
Programme +/- Selects a programme.
7 8 9
NUMBER button Concurrently, compare with the Dynamic, Standard,
APM 0 FAV
APM Mild, User1 and User2 on the screen.
FAV Displays the selected favourite programmes.
SIZE INDEX TIME
(FAVOURITE) ?
REVEAL PIP PR + PIP PR -
PIP PR +/- Selects a programme for the sub picture. PIP INPUT SWAP
PIP INPUT Selects the input mode for the sub picture.
SWAP Alternates between main and sub picture in
PIP/Twin picture mode.
TV, DVD, Selects the remote operating mode: TV, VCR, DVD. Select other operating modes,
VCR, for the remote to operate external devices.
PIP Switches to PIP, POP and Twin picture modes or off mode.
GUIDE Shows a programme schedule.
INFO Shows the present screen information.
COLOURE They are used as per the indications or functions displayed on the TV screen in
Button the case of Text displays (Teletext, EPG) and programme edit.
EXIT Returns to TV viewing from any menu.
LIST Displays the programme table.
MENU Selects a menu.
I/II Selects the sound output or the audio mode.
SLEEP Sets the sleep timer.
These buttons are used for teletext.
1 TELETEXT
BUTTONS Text button is used to enable teletext services while other buttons are for teletext
functions.
* For further details, see the `Teletext' section
Installing Batteries Remote control effective range
R
INPUT
INPUT
D/A POWER TV
D/A POWER TV
INPUT DVD
INPUT DVD
ARC VCR
ARC VCR
TEXT PIP GUIDE INFO
TEXT PIP GUIDE INFO
n Open the battery compartment cover on the LIST
MENU
I/II
back side and install the batteries matching n Use a remote control up to 7 meters distance
correct polarity (+with +,-with -). and 30 degree (left/right) within the receiving
n Install two 1.5V AA batteries. Don't mix old or unit scope.
used batteries with new ones. n Dispose of used batteries in a recycle bin
n Close cover. to preserve environment.
Front Panel Controls
INPUT MENU OK VOL PR
Remote
Control POWER INPUT MENU OK VOLUME PROGRAMME
Sensor Button Button Button Button (F,G)Buttons (E,D)Buttons
Power Standby
Indicator
Illuminates red in
standby mode.
When the TV is turned
on, the indicator blinks
white and then illumi-
nates white before the
picture is displayed.
Back Connection Panel
AUDIO Input
Connections are available for listen-
ing to stereo sound from an external
device.
VIDEO Input
Connects the video signal from a
video device.
10
AV OUT
AV OUT
1
( )
VIDEO AUDIO S-VIDEO VIDEO AUDIO
2 AV IN 1 (MONO) COMPONENT IN 3
VIDEO AUDIO S-VIDEO VIDEO AUDIO
AV IN 1
ANTENNA 7
OUT
ANTENNA
OUT RGB IN REMOTE
4
HDMI/DVI IN 5
DIGITAL AUDIO OUT RS-232C IN
6
ANTENNA
IN
CONTROL IN
8 9
OPTICAL (CONTROL & SERVICE)
AUDIO (RGB/DVI)
REMOTE
ANTENNA CONTROL IN
IN RGB (PC/DTV)
HDMI/DVI INH
1 AV OUT 6 DIGITAL AUDIO OUT OPTICAL
Connect a second TV or monitor. Connect digital audio from various types of
equipment. Note: In standby mode, these
2 AV (Audio/Video) IN 1 ports do not work.
Connect audio/video output from an externa
device to these jacks. 7 RS-232C IN (CONTROL &SERVICE) PORT
Connect to the RS-232C port on a PC.
3 S-VIDEO 8 ANTENNA IN / ANTENNA OUT
Connect S-Video out from an S-VIDEO device. Connect cable signals to this jack.
4 COMPONENT IN 9 RGB/AUDIO IN
Connect a component video/audio device to Connect the output from a settop box or PC
these jacks. to the appropriate input port.
5 HDMI/DVI IN 10 Remote Control Port
Connect a HDMI signal. Connect your wired remote control.
Or DVI(VIDEO)signal to the this port with a
HDMI to DVI cable. Power Cord Socket
For operation with AC power.
Caution: Never attempt to operate the TV on
DC power.
UTOPTICALO
IGITAL AUDIO OUTO INR GB GB UDIO OMPONENT INC
S-232C IN(CONTROL & SERVICE)( (PC/DTV)R INR (RGB/DVI)COMPONENTIN
DMI/DVI INDIGITAL AUDIO D PTICALRS-232C CONTROL & SERVICE)RGB(PC/DTV)RGBINAUDIO (RGB/DVI)A
ACCESSORIES
INPUT
D/A POWER TV
INPUT DVD
ARC VCR
TEXT PIP GUIDE INFO
LIST I/II
MENU
EXIT SLEEP
Owner's Manual OK
Q.VIEW
VOL PR
MUTE
1 2 3
4 5 6
7 8 9
APM 0 FAV
SIZE INDEX TIME
?
REVEAL PIP PR + PIP PR -
PIP INPUT SWAP
Owner's Manual Batteries Remote Control Power Cord
For 42PC1D/42PC1DG/42PC1DV/50PC1D
42PC1DG 42PC1DG
/42PC1DV only /50PC1D only
2-Wall brackets 2-eye-bolts 2- Bolts Polishing Cloth
Polish the screen with
the cloth.
STAND INSTALLATION (OPTION)
1 A
2
3 4
B C
O Place the set with the screen facing down on a cushion or soft cloth as shown in Figures 1.
Before unfolding the stand, please make sure two locks (A) on the bottom of the stand push outward.
O Pull the stand out as shown above in Figures 2 ~ 3.
After unfolding the stand, please insert and tighten the screws in the holes (B) on the bottom of the
stand.
O When connecting cables to the set, Do not disengage the lock (C).
This may cause the set to fall, causing serious bodily injury and serious damage to the set.
* NOTE
Figures shown here may be slightly different from your set.
D A
When closing the stand for storage B
First remove the screws in the holes (B) on the bottom
of the stand. And then pull two Hooks (D) of the stand
bottom
and fold the stand into the back of the set.
After folding, push two Locks (A) of the stand bottom
outward.
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement.
V Application Range
This spec is applied to the 42" PLASMA TV used PB61A Chassis.
Chassis Model Name Market Brand Remark
PB61A 42PC1DV-AA Australia LG
V Specification
Each part is tested as below without special appointment.
1) Temperature : 25