Text preview for : 42-PC1RR.pdf part of LG 42-PC1RR LG Plasma 42-PC1RR chassis MF-056L 42-PC1RR.pdf
Back to : 42-PC1RR.pdf | Home
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
PLASMA TV
SERVICE MANUAL
CHASSIS : MF-056L
MODEL : 42PC1RR
42PC1RR-ZL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SAFETY PRECAUTIONS ....................................................................................3
DESCRIPTION OF CONTROLS ..........................................................................4
SPECIFICATIONS ................................................................................................9
ADJUSTMENT INSTRUCTIONS .......................................................................11
TROUBLE SHOOTING GUIDE ..........................................................................18
BLOCK DIAGRAM .............................................................................................29
EXPLODED VIEW ..............................................................................................32
EXPLODED VIEW PARTS LIST ........................................................................33
REPLACEMENT PARTS LIST...........................................................................34
SCHEMATIC DIAGRAM.........................................................................................
PRINTED CIRCUIT DIAGRAM ..............................................................................
-2-
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.
-3-
DESCRIPTION OF CONTROLS
POWER switches the set on from standby or off to standby. INPUT MULTIMEDIA
POWER
INPUT Selects the TV, AV, Component, RGB or HDMI/DVI
modes.
switches the set on from standby. TV
DVD
VCR
MODE
MULTIMEDIA Selects the Component, RGB or HDMI/DVI modes. AUDIO
CABLE
STB
switches the set on from standby.
MODE Selects another device.
MARK
LIVE
VCR BUT- Controls a video cassette recorder. TV
TONS These buttons are used for X Studio. MEN
U EXIT
For further details, see the `X Studio' section.
MARK Selects the wanted functions.
OK
LIVE TV In AV1, AV2, S-Video2, AV3, AV4, Component, RGB, TIME
SHIFT
TIME
SHIFT
HDMI/DVI input sources, screen returns to the last
TV programme.
Brings up the HOME menu. PIP P
R-
PIP PR + PIP IN
PUT
SWAP
MENU Displays on screen menus one by one.
Exits the current menu. VOL MUTE TEXT PR
Memorizes menu changes.
EXIT Clears all on-screen displays and returns to TV
viewing from any menu.
VOL D / E Increases/decreases sound level.
(Volume
Up/Down)
PR D / E Select a programme.
LIST Q.VIEW
(Programme Switchs the set on from standby.
Up/Down)
SIZE POSITION INDEX TIME
MUTE Switches the sound on or off. REVEAL HOLD SLEEP FAV
?
PIP ARC I/II
TEXT These buttons are used for teletext.
For further details, see the `Teletext' section.
Note : In teletext mode, the PIP PR +/-, SWAP and
PIP INPUT buttons are used for teletext function.
ARC Changes the picture format.
I/II Selects the language during dual language broad-
cast.
Selects the sound output.
-4-
VE T
V
OK accepts your selection or displays the U EXIT
MEN
current mode.
D / E or F
Adjusts menu settings.
/ G
(TIME SHIFT) Selects menu item. OK
TIME TIME
SHIFT SHIFT
PIP Switches the sub picture on or off.
Selects PIP , POP or DW modes.
PIP P
PUT
PIP PR +/- Selects a programme for the sub picture. R-
PIP PR + SWAP
PIP IN
SWAP Alternates between main and sub picture.
VOL MUTE TEXT PR
PIP INPUT Selects the input mode for the sub picture.
SIZE Adjusts the sub picture size.
POSITION Moves the sub picture to D / E or F / G direction.
NUMBER buttons
LIST Displays the programme table. LIST Q.VIEW
Q.VIEW Returns to the previously viewed programme. SIZE POSITION INDEX TIME
REVEAL HOLD SLEEP FAV
SLEEP Sets the sleep timer. ?
PIP ARC I/II
FAV Selects a favourite programme.
Installing Batteries Remote control effective range
1 Open the battery compart-
ment cover on the back
side.
2 Insert two batteries in cor- INPUT
TV
POWER
DVD
MODE
MULTIMEDIA
VCR
INPUT
POWER
MULTIMEDIA
rect polarity (+ with +, -
CABLE
AUDIO STB
DVD
TV VCR
MODE
CABLE
AUDIO STB
MARK
LIVE
TV
EXIT
MENU MARK
LIVE
TV
EXIT
MENU
with -). Don't mix old or
OK
TIME TIME
SHIFT SHIFT
OK
TIME TIME
SHIFT SHIFT
PIP PR
-
PIP PR + PIP INPUT
SWAP
PIP PR
-
PIP PR + PIP INPUT
SWAP
VOL MUTE TEXT PR
used batteries with new VOL MUTE TEXT PR
ones. n Use a remote control 7 meter distance and 30
degree (left/right) within the receiving unit
3 Close the cover. scope.
n Dispose of used batteries in a recyclebin to
preserve environment.
-5-
Front Panel Controls
INPUT MENU OK VOL PR
Power/Standby Indicator