LG RT-42PZ60 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : RF-03OA
MODEL : RT/RZ-42PZ60/70
MODEL : RT-42PZ60H
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
Feb., 2004
Printed in KoreaP/NO : 3828VD0164B
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- 2 -
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS ........................................................................ 4
SPECIFICATIONS .............................................................................................. 8
ADJUSTMENT INSTRUCTIONS ........................................................................9
PRINTED CIRCUIT BOARD ..............................................................................12
BLOCK DIAGRAM.............................................................................................18
EXPLODED VIEW.........................................................................................20,22
EXPLODED VIEW PARTS LIST...................................................................21,23
REPLACEMENT PARTS LIST...........................................................................24
SCHEMATIC DIAGRAM ........................................................................................
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- 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
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- 4 -
DESCRIPTION OF CONTROLS
123
456
789
0
DVD
STB
AUDIO
MODE
POWER
MUTE
TV/AV
MULTIMEDIA
ARC
SSM
Q.VIEW
PSM
FAVOURITE
MENU
PIP PR-
PIPARC
LIST
PLAY
REW FF SKIP
PAUSE STOP
RECORD
ZOOM- ZOOM+ SPLIT ZOOM
SLEEP
I/II
WIN.SIZE WIN.POSITION
PIP INPUT
PIP PR+ SWAP
OK
PIP/DW TEXT
EXIT
PR
VOL
CABLE
VCR
?
M
TV
Displays the selected device.
TV/AV
Selects the TV, AV, Component, RGB
or DVI modes.
MODE
Selects another device.
NUMBER buttons
PIP/DW
Switches the sub picture on or off.
Selects PIP or DW modes.
PIP PR + /-
Selects a program for the sub picture.
SWAP
Alternates between main and sub pic-
ture.
PIP INPUT
Selects the input mode for the sub pic-
ture.
WIN.SIZE
Adjusts the sub picture size.
WIN.POSITION
Moves the sub picture to DD/ EEor FF/ GG
direction.
PIP ARC
Changes the picture format for the
sub picture.
OK
accepts your selection or displays the
current mode.
DD/ EEor FF/ GG
Adjusts menu settings.
Selects menu item.
POWER
switches the set on from standby or
off to standby.
ARC
Changes the picture format.
MUTE
Switches the sound on or off.
Q.VIEW
Returns to the previously viewed
programme.
SSM
To select the sound appropriate to
your viewing programme character.
VOL +/- (Volume Up/Down)
Increases/decreases sound level.
PR +/- (Programme Up/Down)
selects a programme.
EXIT
Clears all on-screen displays and
returns to TV viewing from any
menu.
DVD BUTTONS
Controls a LG DVD player.
SLEEP
Sets the sleep timer.
I/II
Selects the language during dual lan-
guage broadcast.
Selects the sound output.
ZOOM+ / ZOOM-
Enlarges or reduces the main picture
size.
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.
MULTIMEDIA
Selects the Component, RGB or DVI
modes.
FAVOURITE
selects a favorite programme.
PSM
Adjusts the factory preset picture
according to the room.
MENU
Displays on screen menus one by one.
Exits the current menu.
Memorizes menu changes.
VCR BUTTONS
Controls a LG video cassette
recorder.
LIST
Displays the program table.
SPLIT ZOOM
Enlarge the screen with regular
ration.
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1. AUDIO/VIDEO IN SOCKETS
S-VIDEO/AUDIO IN SOCKETS
2.
Remote Control Sensor
3. Main Power Button
4. TV/AV Button
Selects the TV, AV, Component, RGB or DVI modes.If OSD is
displayed, selects menu item.
5. MENU Button
6. FF/ GG(Volume Up/Down) Buttons
7. DD/EE(Programme Up/Down) Buttons
8. Power Standby Indicator
Illuminates red in standby mode, Illuminates green when the
set is turned on
<Front Panel Controls>
ON/OFFS-VIDEO VIDEO AUDIO L/MONO
AV4 R
TV/AV MENU VOL PR
S-VIDEO VIDEO AUDIO L/MONO
AV4 R
TV/AV MENU VOL PR
ON/OFF
-Shown is a simplified representation of the set.
- Here shown may be somewhat different from your set.
1 2 3 4
or 5 6 7 8
1 23 4 5 6 7 8
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Location and Function of Controls
Location and Function of Controls
<Back Panel>
Antenna
RGB INPUT DVI INPUT
AV1
AUDIO INPUT
AV2
COMPONENT
AV3
Y P B
L (MONO)
AUDIO S-VIDEOVIDEO
R
P
R
RS-232C INPUT
EXTERNAL SPEAKER
R L
CONTROL
REMOTE
(CONTROL/SERVICE)
AC INPUT
1. ANTENNA INPUT
2. RGB INPUT / AUDIO INPUT / DVI INPUT
Connect the monitor output socket of the PERSONAL COM-
PUTER to this socket.
3. EURO SCART SOCKET
Connect the euro scart socket of the VCR to these sockets.
4. COMPONENT INPUT
AUDIO/VIDEO IN SOCKETS (AV3)
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 sock-
ets as in AV3.
5. RS-232C INPUT(CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC.
6. CONTROL LOCK / REMOTE CONTROL
7. EXTERNAL SPEAKER OUTPUT (8 ohms)
Connect to optional external speaker(s).
* For further information, refer to ‘Speaker & Speaker Stand’
manual.
1 2 3 4 5 6 7
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- 7 -
D-sub 15 pin cable
AS mark
LG TV
Owner’s Manual
1.5V
1.5V
Alkaline batteries
Power Cord
1 2 3
4 5 6
7 8 9
0
DVD
STB
AUDIO
MODE
POWER
MUTE
TV/AV
MULTIMEDIA
ARC
SSM
Q.VIEW
PSM
FAVOURITE
MENU
PIPPR-
PIPARC
LIST
PLAY
REW FF SKIP
PAUSE STOP
RECORD
ZOOM- ZOOM+ SPLITZOOM
SLEEP
I/II
WIN.SIZE WIN.POSITION
PIPINPUT
PIPPR+ SWAP
OK
PIP/DW TEXT
EXIT
PR
VOL
CABLE
VCR
?
M
TV
Remote Control handset
DVI-D Cable
Accessories
-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
Phone scart cable (Optional)
Tilt wall mounting bracket
Video cables Audio cables
Desktop stand
Wall mounting bracket Ceiling mounting bracket
Speakers
Desktop Speaker stand
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- 8 -
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement .
VScope
This specification can be applied to all model of 42”PDP TV related to RF-03OA Chassis.
V Test Condition
1) Temperature : 25±5°C (77±9°F)
2) Relative Humidity: 65±10%
3) Power Voltage:Standard Input Voltage
(AC 110V-240V~, 50/60Hz)
But Standard input voltage mark value is marked by model.
4) Follow each drawing or spec for spec and performance of parts,based upon P/N of RPL
5)
Warm up set for more than 20min before the measurement.
VTest and Inspection Method
1) Performance : Follow the Standard of LG TV test
2) Extra standards
Safety: Follow the standard of CE, IEC
EMC : Follow the standard of CE, IEC
Remark
Safety : IEC60065, IEC60095
EMI : EN55013
EMS : EN55020
Safety : IEC60065, IEC60095
EMI : EN55013
Model Name
RZ-42PZ70
RT-42PZ70
Market
EU
N-EU
Chassis
RF-03OA
Model Name
RZ-42PZ70
RT-42PZ70
Market Place
EU
N-EU
Brand
LG
LG
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1. Application Object
These instructions are applied to all of the PDP monitor/
Tuner , RF-03OA chassis.
2. Notes
(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 220V, 60Hz in
adjusting.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
¤After receiving 100% white pattern, the receiver must be
operate prior to adjustment.(Or white condition in HEAT-
RUN mode)
¤ŁEnter into HEAT-RUN mode
- Select the HEAT-RUN OFF by pressing ADJ Key on
Remote Control for adjustment.
- Press the VOL + Key in HEAT-RUN OFF.
(OSD display HEAT-RUN WHITE and screen display
100% FULL WHITE PATTERN)
[Set is activated HEAT-RUN without signal generator in
this mode.
[Single color pattern of HEAT-RUN mode uses to check
PANEL.(RED/BLUE/GREEN)
If you turn on a still screen more than 20 minutes, a
afterimage may be occur in the black level part of the
screen.
3. Board Adjustment Method
<Channel memory>
(1) Input the power to VSC board.
(2) Connect the PC for channel memory work to VSC board
whit RS-232C.
(3) Execute the program for channel memory that fit each
BOM
- Method to execute program for channel memory
¤Click the “CHANNEL(RF03OA_B).EXE” to execution.
¤ŁSelect the setting PORT of PC in”SELECT PORT” and
then click the “SELECT PORT”.
¤ØClick the “DOWN LOAD TO E2PROM”
¤ŒClick the “OPEN“ in FILE NAME
¤ºClick a suitable data on BOM.
¤ºClick the “ENTER”
¤Show the channel memory.
¤When the channel memory is finished, divide the RS-
232C CABLE in VSC BOARD.
¤In case VSC BOARD of same BOM, connect the RS-
232C CABLE and then repeat 6)~8) by same method.
4. RGB Auto Cut-Off & MIN Bia
Adjustment
(1) Input Full White (255 Gray) signal which generated from
Pattern Generator into RGB1 Input part.
(2) Press POWER ON KEY on R/C for adjustment and select
AUTO-CUT(Cut-off Auto Adjustment)
(3) Press Vol. + key and operate TO SET
(4) Screen adjustment starts with Full Black screen.
Original Full White screen will be presented about 3-5
seconds later. And if there is a mark of OK OSD, then the
Auto Cut-off and Min-Bias adjustment will be completed.
(5) Pass to the next MAX Bias Adjustment after Adjustment.
OYou can check whether circuit adjustment is operated well or
not, as below.
(1) Display RGB to the Main picture, AV to the Sub picture in
the TWIN PICTURE.
(2) To check the MIN-Bias, input Full Black (0 gray) signal into
AV and RGB input part at the same time in the Pattern
Generator.
(3) To check the MAX-Bias, input Full White (255 gray) signal
into AV and RGB input part at the same time in the Pattern
Generator.
(4) Compare Black Level with White Level by eyes. And if
there is no Level difference, the adjustment is completed
well.
OData value, which adjusted in the board, is valid until the VSC
Board is disuse and must be protected. For the protection of
data, Micom does not permit any more adjustment after
completion.
OIn case of re-adjustment, operate First Value Setting.
5. POWER PCB Assy Voltage
Adjustment (Va, Vs, Voltage Adjustment)
5-1. Test Equipment
: D.M.M 1EA
5-2. Connection Diagram for Measuring
: refer to<fig 1>
5-3. Adjustment Method
(1) Va Adjustment
¤After receiving 100% white pattern, HEAT RUN.
¤Ł Connect + terminal of D.M.M to Va pin of P805 and
connect – terminal to GND pin of P805.
¤Ø After turning the VR351, voltage of D.M.M adjustment
as same as Va voltage which on label of panel
Right/Top. (Deviation : ±0.5V)
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ADJUSTMENT INSTRUCTIONS
Each PCB Assy must be checked by the Check JIG Set before
whole assembly. (Be careful the POWER PCB Assy not to
damage to PDP Module)
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(2) Vs Adjustment
¤Connect + terminal of D.M.M to Vs pin of P805 and
connect – terminal to GND pin of P805.
¤Ł After turning the VR551, voltage of D.M.M adjustment
as same as Vs voltage which on label of panel
Right/Top. (Deviation : ±0.5V)
(3) 5.2V Adjustment
¤Connect + terminal of D.M.M to 5V pin of P804 and
connect – terminal to GND pin of P804.
¤Ł Turning VR251, adjust the volt value to 5.2v value.
6. Adjustment of White Balance
6-1. Required Equipment
Color analyzer (CA-100 or same product)
6-2. Connection Diagram of Equipment for
Measuring (Manual Adjustment)
: refer to <fig 2>,<fig 3>
6-3. Adjustment of White Balance
OOperate the Zero-calibration of the CA-100, then stick
sensor to PDP module surface when you adjust.
OFor manual adjustment, it is also possible by the following
sequence.
(1) Select WHITE PATTERN of HEAT RUN mode by pressing
POWER ON KEY on remote control for adjustment then
operate HEAT RUN more than 15 minute.
(2) Supply 70Gray, 216Gray Level, 100% size length and
breadth signal to AV input. (Refer to <fig 2>,<fig 3>)
RZ-42PZ70 : AV3, RT-42PZ70 : AV1
(3) White balance is adjusted from Low Light to High Light,
And pushing the Vkey, save the adjustment value.
(4) Low Light, stick sensor to 70Gray Pattern and then press
ADJ Key on R/C for adjustment and press D, Eon R/C in
adjustment mode to select R-H or G-H, press VOL +, - Key
and adjust it until color coordination becomes as below.
[RZ-42PZ70, RT-42PZ70]
X: 0.290±0.003, Y: 0.300±0.003
Color temperature: 8,600°K±500°K
(5) High Light, stick sensor to 216Gray Pattern and then press
ADJ Key on R/C for adjustment and press D, Eon R/C in
adjustment mode to select R-H or G-H, press VOL +, - Key
and adjust it until color coordination becomes as below.
[RZ-42PZ70, RT-42PZ70]
X: 0.285±0.003, Y: 0.285±0.003
Color temperature: 9,700°K±500°K
(6) Exit adjustment mode using VKey.
7. Map for Auto adjustment (RS-232C)
- 10 -
Va ADJ
VR351
Vs ADJ
VR551
CN 804
CN 803
CN 802
CN 810
CN 809
CN 808
VS
Va
Va
GND
GND
VS
VS
5V
<Fig 1> Connection Diagram for Measuring of Power Adjustment
Typ
Baud Rate
1150200
Index
R-L
G-L
R-H
G-H
Data bit
8
Cmd1 Cmd2
j j
j k
j a
j b
Stop bit
1
Parity
NONE
RF-03OA_PDP42
Protocol
Setting
Data Min Value
54(36)
54(36)
180(B4)
170(A4)
Max Value
90(5A)
85(FA)
254(FE)
250(FA)
RS232
R-L 70R-L 70
G-L 70G-L 70
R-M 128R-M 128
G-M 128G-M 128
R-H 216R-H 216
G-H 216G-H 216
Window
MSPG-2100 or
MSTG-5200
RGB Signal Input
High Light adjustment
70 Gray Level
<Fig 2> Low Light(Connection Diagram of Manual Adjustment)
R-L 70R-L 70
G-L 70G-L 70
R-M 128R-M 128
G-M 128G-M 128
R-H 216R-H 216
G-H 216G-H 216
Window
MSPG-2100 or
MSTG-5200
RGB Signal Input
High Light adjustment
216 Gray Level
<Fig 2> High Light Light(Connection Diagram of Manual Adjustment)
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8. Adjustment of Component Off-Set
8-1. Required Test Equipment
: HD-STB(SK-010T) or same product
8-2. Manual Adjustment of Component Off-
Set
(1) Input Video signal and Component 720P,1080i signal of
HD-STB.
(2) Press ADJ key of R/C twice for entering twin picture mode.
(3) Adjust the same color senses between main and sub,
using Volume +; -key of R/C in R, G, B Off-Set menu.
9. DDC Data input
9-1. Required Test Equipment
(1) A jig for adjusting PC, DDC. (PC serial to D-sub
Connection equipment)
(2) S/W for writing DDC(EDID data write & read)
(3) D-Sub 15P cable, D-Sub to DVI Connector (Connect to
DVI Jack)
9-2. Setting of Device
9-3. Preparation for Adjustment
(1) Set devices as above and turn the PC, jig on.
(2) Put S/W for writing DDC (EDID data write & read) into
operation. (operated in DOS mode.)
9-4. Sequence of Adjustment
(1) DDC Data Input for Analog-RGB
¤Put the set on the table and turn the power on.
¤ŁConnect PC Serial to D-sub 15P Cable of JIG for DDC
Adjustment to RGB terminal (D-Sub 15Pin).
¤Ø Operate S/W for DDC record and select DDC Data for
Analog RGB in Model Menu.
¤Œ Operate EDID Write command.
¤º Operate EDID Read command and check whether
Check Sum is OK.
¤If Check Sum is NG, repeat c) ~ d).
¤If Check Sum is OK, DDC Data for Analog-RGB input is
completed.
(2) DDC Data input for Digital-RGB
¤Connect PC Serial to DVI Cable of JIG for DDC
Adjustment to RGB2 terminal (DVI Jack).
¤Ł Operate S/W for DDC record and select DDC Data for
Digital RGB in Model Menu.
¤ØOperate EDID Write command.
¤Œ Operate EDID Read command and check whether
Check Sum is OK.
¤ºIf Check Sum is NG, repeat c) ~ d).
¤If Check Sum is OK, DDC Data for Digital-RGB input is
completed.
* If you change the Booster 0 to 1 in a fringe area, a
user ca set to Booster “On”.
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MAIN (TOP) PRINTED CIRCUIT BOARD
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MAIN (BOTTOM)
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REAR AV (TOP) REAR AV (BOTTOM) AV BOARD (TOP)
AV BOARD (BOTTOM)
POWER SWITCH
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- 15 -
PREAMP (BOTTOM)
PREAMP (TOP)
SPEAKER (TOP)
SPEAKER (BOTTOM)
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- 16 -
TUNER (TOP)
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TUNER (BOTTOM)
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- 18 -
BLOCK DIAGRAM
cable
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MEMO
- 19 -
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EXPLODED VIEW(RT/RZ-42PZ70)
411
301
304
303
302
300
305
400
200
580
581
203
208
204
205
209
207
206
410
570
540
550
551
552
401
530
531
590
532
520
522
560
523
525
524
582
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