42PG3000-ZA (CHASSIS:PD83A) - LG TV Service Manual (repair manual)

Model
42PG3000-ZA (CHASSIS:PD83A)
Pages
30
Size
16.05 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pg3000-za-chassis-pd83a.pdf
Date

View LG 42PG3000-ZA (CHASSIS:PD83A) Service Manual online

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PD83A
MODEL : 42PG3000
42PG3000-ZA
- 2 -
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION ........................................................................................4
ADJUSTMENT INSTRUCTION .................................................................6
TROUBLE SHOOTING ............................................................................15
BLOCK DIAGRAM...................................................................................24
EXPLODED VIEW .................................................................................. 26
SVC. SHEET  ...............................................................................................
PRINTED CIRCUIT DIAGRAM ....................................................................
- 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
- 4 -
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 PD83A Chassis.
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 SBOM.
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 ( 42”XGA )
Chassis
PD83A
42PG3000
Austria,Belgium,Bulgaria,Coratia,Czech,Denmark,Finland,
France,Germany,Greece,Hungary,Italy,Luxembourg,
Netherlands,Norway,Poland,Portugal,Rumania,Russia,Ser
bia,Slovenia,Spain,Sweden,Switzerland,UK
LG
Model Name
Market
Brand
Remark
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No
Item
Specification
Remark
42” Wide Color Display Module
16:9
PDP42XG,
RGB Closed Type, Film Filter
1)Temp.
: 0~40deg
2)Humidity : 20~80%
3)Temp.
: -20~60deg
4)Humidity : 10~90%
100-240V~, 50/60Hz
Plasma Display Panel
LGE SPEC.
Maker : LG
42PG3000-ZA
Safety : IEC/EN60065
EMI
: EN55013
EMS
: EN55020
Austria,Belgium,Bulgaria,Coratia,Czech,Denmark,Finland
,France,Germany,Greece,Hungary,Italy,Luxembourg,
Netherlands,Norway,Poland,Portugal,Rumania,Russia,
Serbia,Slovenia,Spain,Sweden,Switzerland,UK
Model
Appliance
Market
Remark
- 5 -
V
Module Specification2
Market
roadcasting system
Receiving system
Scart Jack(2EA)
Video Input (1EA)
S-Video Input (1EA)
Component Input (1EA)
RGB Input
HDMI Input(3EA)
Audio Input (3EA)
1
2
3
4
5
6
7
No
Item
Specification
Remark
Austria,Belgium,Bulgaria,Coratia,Czech,Denmark,Finland
,France,Germany,Greece,Hungary,Italy,Luxembourg,
Netherlands,Norway,Poland,Portugal,Rumania,Russia,
Serbia,Slovenia,Spain,Sweden,Switzerland,UK
1) PAL-BG
2) PAL-DK
3) PAL I, I’
4) DVB T(ID TV)
5) SECAM L/L’
Analog : Upper Heterodyne
Digital : COFDM
PAL, SECAM
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-DTV & SOUND
PC Audio, Component, AV
Analog Only
EU(PAL Marker)
4 System : PAL, SECAM,NTSC,PAL60
4 System : PAL, SECAM,NTSC,PAL60
- 6 -
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied all of the 42” PLASMA TV, 
PD83A
Chassis.
2. Note
(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  100-240V~,
50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
In case of keeping module is in the circumstance of 0°C, it
should  be  placed  in  the  circumstance  of  above  15°C    for
2hours.
In case of keeping module is in the circumstance of below
-20°C,  it  should  be  placed  in  the  circumstance  of  above
15°C  for 3hours.
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 PATTERN MODE.
* 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.
3. ADC Calibration
Auto adjustment Map(RS-232C)
- Baud : 115200bps, RS232 Host : PC, Echo : none.
4. ADC adjustment
5. Adjustment of RGB
5-1. Auto RGB Gain / Offset Adjustment
(1) Convert to PC  in Input-source(refer to I2C command at page 10)
(2) Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA([email protected])
Model : 60
in pattern Generator
Pattern : 65 in pattern Generator(MSPG-925 Series) 
[gray  pattern  that  left  &  right  is  black  and  center  is  white
signal(Refer below picture)].
(3) Adjust by commanding AUTO_COLOR_ADJUST.
5-2. Confirmation
(1) We confirm whether “0xAA(RGB)” address of EEPROM
“0xA2” is “0xAA” or not.
(2) If “0xAA(RGB)” address of EEPROM “0xA2” isn’t “0xAA”,
we adjust once more.
(3) We can confirm the ADC values from “0xA4~0xA9(RGB)”
address in a page “0xA2”.
Manual  ADC process using  Service  Remocon.  After  enter
Service  Mode  by  pushing  “ADJ”  key,  execute  “ADC  Adjust”
by pushing “
G
“ key at “ADC CALIBRATION : RGB-C”.
* Using ‘power on’ button off the control R/C, power on TV.
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.
ADC adjust
Data Read
Default Write
Enter
Adjust Mode
ADC adjust
ADC Parameter
Digital Data
ADC Parameter
(Average)
Adjustment
Confirmation
Adjust Mode In
Adjust Mode Out
NO
Item
Remark
CMD1 CMD2 Data 0
A
A
A
A
A
A
A
D
D
D
D
D
D
D
0
0
0
0
9
0
0
1
2
3
4
9
0
9
Transfer 18Byte
(Input resolution Data)
To check ADC Adjustment
on Assembly line
When transfer the ‘Mode
In’, Carry the command.
MSPG925FS
Component
RGB-PC
ADC
Model : 60
(1024*768 60Hz)
Pattern : 65
Model : 209(480i 60Hz)
223(1080i 60Hz)
Pattern : 65
(Fig.1)
- 7 -
6. Component input ADC
6-1. Component Gain/Offset Adjustment
(1) Convert to PC  in Input-source(refer to I2C command at page 10)
(2) Signal equipment displays
1) Impress Resolution 480i
Model : 209
in pattern Generator(480i Mode)
Pattern : 65
in pattern Generator(MSPG-925 Series) 
2) Impress Resolution 1080i
Model : 223 in pattern Generator(1080i Mode)
Pattern : 65 in pattern Generator(MSPG-925 Series) 
6-2. Confirmation
(1) We  confirm  whether  “0xB3(480i)/0xBC(1080i)”  address
of EEPROM “0xA2” is “0xAA” or not.
(2) If  “0xB3(480i)/0xBC(1080i)” address  of  EEPROM  “0xA2”
isn’t “0xAA”, we adjust once more.
(3) We 
can 
confirm 
the 
ADC 
values 
from
“0xAD~0xB2(480i)/0xB6~BB(1080i)” address  in  a  page
“0xA2”.
* Manual  ADC process  using  Service  Remocon.  After  enter
Service  Mode  by  pushing  “ADJ”  key,  execute  “ADC  Adjust”
by pushing “
G
“ key at “ADC CALIBRATION : RGB-C”.
7. POWER PCB Assy Voltage
Adjustments 
(Va, Vs Voltage adjustments)
7-1. Test Equipment :
D.M.M. 1EA
7-2.Connection Diagram for Measuring
: refer to Fig.3
7-3. Adjustment Method
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P811, connect
- terminal to GND pin of P811.
3)  After  turning  VR901,  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) Input signal : RF noise signal.
2) Connect + terminal of D.M.M to Vs pin of P811, connect
– terminal to GND pin of P811.
3)  After  turning  VR951,  voltage  of  D.M.M  adjustment  as
same  as  Va  voltage  which  on  label  of  panel  right/top.
(Deviation; ±0.5V)
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig.2)
(Fig.3) Connection diagram of power adjustment for measuring
8. EDID
(The Extended Display Identification Data )
/DDC
(Display Data Channel)
download
8-1. 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.
8-2. Required Test Equipment
8-3. Preparation for Adjustment
(1) Connect the Set, EDID Download Jig, PC & Cable.
(2)  Turn  on  the  PC  &  EDID  Download  Jig.  Set  up  the  S/W
option.
(3) Power on the Set.
8-4. Sequence of Adjustment
(1) EDID Download
1) Init the data.
2) Load the EDID data.(Open File).
[ Analog file ] (for RGB)]
[ Digital file ] (for HDMI)
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.
6) If TV has three HDMI INPUT, you must download three
times for each HDMI.
8-5. EDID DATA
1) Analog-RGB.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
1.[1]-Product ID
2. [2]-Serial No :  Controlled on production line.
3. [3]-Month, Year : Controlled on production line.
ex) Monthly:   '03'     =>  '03' 
Year     :  '2006' =>  '10'
4. [4]-Model Name :  model name.
5. [5]-Checksum -> Changeable by total EDID data.
2) HDMI_1.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
1.[1]-Product ID
2. [2]-Serial No :  Controlled on production line.
3. [3]-Month, Year : Controlled on production line.
ex) Monthly:   '03'     =>  '03' 
Year     :  '2006' =>  '10'
4. [4]-Model Name :  model name.
5. [5]-Checksum -> Changeable by total EDID data
- 8 -
(Fig.5) Connection Diagram of DDC download
[1]
[2]
[3]
[4]
[5]
[1]
[2]
[3]
[4]
[5]
[5]
42PG3000
Product ID
Product ID
Model Name
EDID table
019D
Hex
9D11
40193
42PG3000
Product ID
Product ID
Model Name
EDID table
029D
Hex
9D02
40194
42PG3000
00 00 00 FC 00 34 32 50 47 33 30 30 30 0A 20 20 20 20
Model Name
Model Name(Hex)
42PG3000
00 00 00 FC 00 34 32 50 47 33 30 30 30 0A 20 20 20 20
Model Name
Model Name(Hex)
2) HDMI_2.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
* Please refer HDMI_1.
3) HDMI_3.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
* Please refer HDMI_1.
9. Adjustment of White Balance
9-1. Required Equipment
(1) Remote control for adjustment.
(2) Color Analyzer : CS-1000, CA-100,100+, CA210 or same 
product.: CH 10
* Please adjust CA-210+, CA-100+ by before measuring.
(3) Auto W/B adjustment instrument.(only for Auto adjustment)
(4) AV Pattern Generator.
(5)  15Pin  D-Sub  Jack(RGB)  is  connected  to  the  AUTO  W/B
EQUIPMENT.
9-2. AUTO White Balance Process
- Adjust Process will start by execute I2C Command(Inner
pattern (0xF3, 0xFF)).
Color temperature standards according to CSM and Module.
CS-1000/CA-100+/CA-210(CH 10) White balance adjustment
coordinate and color temperature.
9-3. Manual W/B  process
(using adjusts Remote control)
(1) After enter Service Mode by pushing “ADJ” key.
(2) Enter White Pattern off of service mode, and change off ->
on.
(3) Enter “W/B ADJUST” by pushing “
G
” key at “3. W/B
ADJUST”.
- 9 -
[1]
[2]
[3]
[4]
[5]
[5]
[1]
[2]
[3]
[4]
[5]
[5]
* Before adjusting White-balance, the AV ADC should be done.
If ADC status were “NG”, Need to ADC adjustment.
PLASMA
Remark
11000K
9300K
6500K
Cool
Normal
Warm
CSM
Color Coordinate
x
0.283
0.293
0.329
11,000K
9,300K
6,500K
0.000
0.000
0.003
0.276
0.285
0.313
COOL
MEDIUM
WARM
CSM
Temp
uv
9-4. Connection Picture of the Measuring
Instrument(On Automatic control)
(1) Inside PATTERN is used when W/B is controlled. Connect
to auto controller or push control R/C IN-START -> Enter
the mode of White-Balance, the pattern will come out.
9-5. Auto-control interface and directions
(1) Adjust in the place where the influx of light like floodlight
around is blocked.(illumination is less than 10ux)
(2) Measure and adjust after sticking the Color Analyzer(CA-
100+, CA210) to the side of the module.
(3) Aging time 
- After aging start, keep the power on(no suspension of
power supply) and heat-run over 15minutes.
- keep white pattern using inside pattern.
Auto adjustment Map(I2C)
- I2C(100K BPS)
10. Communication START
* Until ACK BIT goes LOW, Repeat it.
11. Command form
Command form use DDC2AB standard communication
protocol.
1. LEN : DATA BYTE number to send.
2. CMD : Command language that monitor executes.
3. VAL : FOS DATA
4. CS : Dada’s CHECKSUM that transmit.
5. DELAY : 50MS
6. A : Acknowledge.
12. EEPROM DATA READ
12-1. Single TABLE
12-2. Command Set
* To read the appointment Address of E
2
PROM by 128(80h)-
byte
13. EEPROM Data Write(Serial No D/L)
13-1. Signal TABLE
CMD
: 8Eh 
LENGTH : 84h+bytes
ADH
: E
2
PROM Slave Address(A0,A2,A4,A6,A8)
Not 00h(Reserved by Buffer To EEPROM)
ADL
: E
2
PROM Sub Address low  (00~FF)
Data
: Write data
CS
: CMD + LENGTH + ADH + ADL + Data_1 + ... + Data_n
13-2. Command Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, Phase
Data write : Model Name and Serial Number write in EEPROM,.
13-3. Method & Notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
- 10 -
(Fig.6) Auto AV(CVBS) Color Balance Test Pattern
Full White Pattern
RS-232C Communication
CA-210
Color
ANALYZER
TYPE : CA-210
Delay 100ms
128Bytes
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS A STOP
START
6E
A
STOP
50Ms
E7
A0
A2
A4
A6
0
80
0
80
0
80
0
80
0-page
0~7F
Read
0-page
80~7F Read
1-page
0~7F
Read
1-page
80~7F Read
2-page
0~7F
Read
2-page
80~7F Read
3-page
0~7F
Read
3-page
80~7F Read
EEPROM READ
1
2
3
4
5
6
7
8
No.
Adjustment
contents
CMD
(hex)
ADH
(hex)
ADL
(hex)
Details
CMD LENGTH ADH ADL DATA_1
DATA_n
...
CS
DELAY
No
1
2
EEPROM WRITE
E8
94
84+n
16-Byte Write
n-Byte Write
Adjust mode
CMD(hex) LENGTH(hex)
Description

Download LG 42PG3000-ZA (CHASSIS:PD83A) Service Manual (Repair Manual)

Here you can view online and download LG 42PG3000-ZA (CHASSIS:PD83A) Service Manual in PDF. 42PG3000-ZA (CHASSIS:PD83A) service manual will guide through the process and help you recover, restore, fix, disassemble and repair LG 42PG3000-ZA (CHASSIS:PD83A) Plasma. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.