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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 the Do not use a line Isolation Transformer during this check.
servicing of a receiver whose chassis is not isolated from the AC Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
power line. Use a transformer of adequate power rating as this between a known good earth ground (Water Pipe, Conduit, etc.)
protects the technician from accidents resulting in personal injury and the exposed metallic parts.
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 voltage
damaged by accidental shorts of the circuitry that may be measurements for each exposed metallic part. Any voltage
inadvertently introduced during the service operation. 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 it In case any measurement is out of the limits specified, there is
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) CONDUIT etc.
To Instrument's
With the instrument AC plug removed from AC source, connect an 0.15uF
exposed
electrical jumper across the two AC plug prongs. Place the AC METALLIC PARTS
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 1.5 Kohm/10W
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 COMPONENT IN
ANTENNA
OUT 7
ANTENNA REMOTE
OUT RGB IN
ANTENNA CONTROL IN
HDMI/DVI IN
4
DIGITAL AUDIO OUT
OPTICAL 5
RS-232C IN
(CONTROL & SERVICE) 6
IN
8 9
AUDIO (RGB/DVI)
RGB IN REMOTE
ANTENNA
RGB (PC/DTV)
CONTROL IN
HDMI/DVI IN DIGITAL AUDIO OUT RS-232C IN IN
OPTICAL (CONTROL & SERVICE)
AUDIO (RGB/DVI)
RGB (PC/DTV)
1 AV OUT 6 RS-232C IN (CONTROL &SERVICE) PORT
Connect a second TV or monitor. Connect to the RS-232C port on a PC.
2 AV (Audio/Video) IN 1 7 ANTENNA IN / ANTENNA OUT
Connect audio/video output from an externa Connect cable signals to this jack.
device to these jacks.
S-VIDEO
8 RGB/AUDIO IN
Connect S-Video out from an S-VIDEO device. Connect the output from a settop box or PC
to the appropriate input port.
3 COMPONENT IN 9 Remote Control Port
Connect a component video/audio device to
these jacks. Connect your wired remote control.
4 HDMI/DVI IN
10 Power Cord Socket
Connect a HDMI signal. For operation with AC power.
Or DVI(VIDEO)signal to the this port with a Caution: Never attempt to operate the TV on
HDMI to DVI cable. DC power.
5 DIGITAL AUDIO OUT OPTICAL
Connect digital audio from various types of
equipment. Note: In standby mode, these
ports do not work.
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*/50PC1D*
42PC1D*
2-Wall brackets 2-eye-bolts 2- Bolts
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