LG 42PT330 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PU14K
MODEL : 42PT330/350/350C
42PT330-UB/42PT350-UD/
42PT350C-UD
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
Printed in Korea
P/NO : MFL67002603(1106-REV01)

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CONTENTS
CONTENTS ............................................................................................................................... 2
SAFETY PRECAUTIONS ...........................................................................................................3
SPECIFICATION.........................................................................................................................4
ADJUSTMENT INSTRUCTION ..................................................................................................7
BLOCK DIAGRAM ...................................................................................................................12
EXPLODED VIEW ..................................................................................................................13
CIRCUIT DIAGRAM .....................................................................................................................

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SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special sa ety-related characteristics. These parts are identi ied by in
the Schematic Diagram and Exploded View.
It is essential that these special sa ety parts should be replaced with the same components as recommended in this manual to
prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modi y the original design without permission o manu acturer.
Ge eral Guida ce
An isolatio Tra sformer should always be used during the
servicing o a receiver whose chassis is not isolated rom the AC
power line. Use a trans ormer o adequate power rating as this
protects the technician rom accidents resulting in personal injury
rom electrical shocks.
It will also protect the receiver and it's components rom being
damaged by accidental shorts o the circuitry that may be
inadvertently introduced during the service operation.
I any use (or Fusible Resistor) in this monitor is blown, replace it
with the speci ied.
When replacing a high wattage resistor (Oxide Metal Film
Resistor, over 1W), keep the resistor 10mm away rom PCB.
Keep wires away rom high voltage or high temperature parts.
Due to high vacuum and large sur ace area o picture tube,
extreme care should be used in ha dli g the Picture Tube.
Do not li t the Picture tube by it's Neck.
Leakage Curre t Cold Check(A te a Cold Check)
With the instrument AC plug removed rom AC source, connect
an electrical jumper across the two AC plug prongs. Place the
AC switch in the on position, connect one lead o 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.
I 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 in inite.
An other abnormality exists that must be corrected be ore the
receiver is returned to the customer.
Leakage Curre t Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do ot use a li e Isolatio Tra sformer duri g 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 or 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 o the limits speci ied, there is
possibility o shock hazard and the set must be checked and
repaired be ore it is returned to the customer.
Leakage Curre t 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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SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application Range
(1) This spec sheet is applied all of PDP TV with PU14K chassis.
(2) Not included spec and each product spec in this spec sheet apply correspondingly to the following each country
2. Specification
Each part is tested as below without special appointment.
(1) Temperature : 20 °C ± 5 °C
(2) Relative Humidity : 65 % ± 10 %
(3) Power Voltage : Standard input voltage (100 V ~ 240 V @ 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
BOM.
(5) The receiver must be operated for about 5 minutes prior to the adjustment.<-DQA Request
3. Test Method
(1) Performance : LGE TV test method followed.
(2) Demanded other specification
Safety : UL, CSA, IEC,CE specification
EMC : FCC, ICES, IEC, CE specification
Model Name
42PT330-UB
42PT350-UD
42PT350C-UD
Remark
Safety : UL1492, CSA C22.2.No.1
EMC : FCC Class B, IC Class B
Market
NORTH AMERICA
Model Name
42PT330-UB
42PT350-UD
42PT350C-UD
Brand
LG
Market
NORTH AMERICA
Remark
PDP 42T3N

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4. Ge eral Specificatio
No Item Speci ication Remark
1. Receiving System 1) ATSC/64 & 256 QAM/ NTSC-M
2. Available Channel 1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
3. Input Voltage 1) AC 100 V ~ 240 V 50/60Hz
2) AC 100 V ~ 120 V 50/60Hz
4. Market NORTH AMERICA
5. Screen Size 106 cm (42 inch) Wide(1024 ×768) 42T3N
127 cm (50 inch) Wide(1024 ×768) 50T3N
127 cm (50 inch) Wide(1920 ×1080) 50R3
152 cm (60 inch) Wide(1920 ×1080) 60R3
6. Aspect Ratio 16:9
7. Tuning System FS
8. PDP Module PDP42T3#### (1024 ×768)
PDP50T3#### (1024 ×768)
PDP50R3#### (1920 ×1080)
PDP60R3#### (1920 ×1080)
9. Operating Environment 1) Temp : 0 deg ~ 40 deg
2) Humidity : ~ 80 %
10. Storage Environment 1) Temp : -20 deg ~ 60 deg
2) Humidity : 0 % ~ 85 %

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5. Chroma
(1) 42T3N, 50T3N, 50R3, 60R3 Module
No Item Min Typ Max Unit Remark
1 Color White X 0.270 0.285 0.300 08.11.20 Xrange change +-0.015
coordinate Y 0.283 0.293 0.303 09.10.13 blue Y Change
Red X 0.635 0.640 Unlimitedness 0.065~0.075
Y 0.318 0.330 0.345 - White : 85IRE(216Gray) 100%
Green X 0.242 0.300 0.305 100% Window White Pattern
Y 0.595 0.600 Unlimitedness - R/G/B : 100IRE(255Gray)
Blue X Unlimitedness 0.150 0.158 100% Window White Pattern
Y Unlimitedness 0.065 0.075 - Picture: Vivid(Medium )
- 100% Window
- 85IRE 100% Window White
2 Color coordinate uni ormity -0.020 average +0.020 Pattern
- Picture: Vivid(Medium)
3 Color Cool 0.261 0.276 0.291 - White : 85IRE(216Gray) 100%
Temperature 0.268 0.283 0.298 Window White Pattern
Medium 0.270 0.285 0.300
- 100% Window
0.278 0.293 0.308
08.11.20 range change +-0.015
Warm : ColorGamut => WIDE
Warm 0.298 0.313 0.328 Cool:Color temperature C30
0.314 0.329 0.344
Meduum:Color temperature 0
Warm:Color temperature W30
- - 85IRE(216Gray) 100% Window
4 Brightness uni ormity -10 0 +10 % White Pattern
- Picture: Vivid(Medium)

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ADJUSTMENT INSTRUCTION
1. Applicatio Ra ge
This spec sheet is applied to all o the PU14K Chassis.
2. Specificatio
(1) Because this is not a hot chassis, it is not necessary to use
an isolation trans ormer. However, the use o isolation
trans ormer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be per ormed in the circumstance o
25 cC ± 5 cC o temperature and 65 % ± 10 % o relative
humidity i there is no speci ic designation.
(4) The input voltage o the receiver must keep
100 V ~ 240 V, 50 / 60 Hz.
(5) The receiver must be operated or about 5 minutes prior to
the adjustment when module is in the circumstance o over
15 cC
- In case o keeping module is in the circumstance o 0 cC,
it should be placed in the circumstance o above 15 cC or
2 hours
- In case o keeping module is in the circumstance o below
-20 cC, it should be placed in the circumstance o above
15 cC or 3 hours.
1) Press the POWER ON KEY on R/C or adjustment.
2) Press the ADJ KEY on R/C and enter EZ ADJUST.
Select “4. WHITE PATTERN” by using D/E(CH +/-) and
select “White” by using F/G(VOL +/-)
- Set is activated HEAT run without signal generator in this
mode.
- Single color pattern (RED / BLUE / GREEN) o HEAT
RUN MODE uses to check panel.
Caution: I you turn on a still screen more than 20 minutes
(Especially digital pattern, cross hatch pattern), an a ter
image may be occur in the black level part o the
screen.
V Adjustment list
PCB assembly adjustment method
- ADC Adjustment
- DDC EDID Write Con irmation
V Total assembly line process
- POWER PCB Ass’y Voltage adjustment
- Adjustment o White Balance
- RS-232C
- OPTION
- Outgoing condition Con iguration
- Internal pressure
3. PCB assembly adjustme t method
* Caution: Set up “RF mode(noise)” a ter PCB assembly
adjustment.
*Download
(1) Execute ISP program “Mstar ISP Utility” and then click
“Con ig” tab.
(2) Set as below, and then click “Auto Detect” and check “OK”
message
I display “Error”, Check connect computer, jig, and set.
(3) Click “Connect” tab. I display “Can’t ”, Check connect
computer, jig, and set.
(4) Click “Read” tab, and then load download ile(XXXX.bin)
by clicking “Read”
(5) Click “Auto” tab and set as below
(6) Click “Run”.
(7) A ter downloading, check “OK” message.
(1) (3)
(2) OK
vr
Please Check the Speed :
To use speed between from 200KHz to 400KHz
(4)
filexxx.bin
(5)
(6)
(7) ÉÉÉ.OK

4. ADC Process
4-1. Auto ADC Process (using DFT)
PC (for communication through RS-232C) UART Baud rate
: 1152 bps
Command : aa (Start factory mode)
Command : ad 1 (working Auto ADC)
Command : aa 9 (End of Auto ADC Process)
4-2. Manual ADC Process using Service
Remocon
After enter Service Mode by pushing “ADJ” key, execute
“ADC Adjust” by pushing “G” key at “ . ADC CALIBRATION”.
4- . Confirmation
(1) We confirm whether “ xBF(48 i)/ xC8(1 8 i)” address of
EEPROM “ xA2” is “ xAA” or not.
(2) If “ xBF(48 i)/ xC8(1 8 i)” address of EEPROM “ xA2”
isn’t “ xAA”, we adjust once more
(3) We can confirm the ADC values from “ xB9 ~ xBE(48 i) /
xC2 ~ (1 8 i)” addresses in a page “ xA2”
* Manual ADC Confirmation using Service Remocon. After
enter Service Mode by pushing “INSTART” key,
5. DDC EDID Write Confirmation
6. Total Assembly line process
* Caution : Each PCB assembly must be checked by check JIG
set.(Because power PCB Assembly damages to PDP Module,
especially be careful)
* Caution: Set up “RF mode(noise)” before voltage adjustment.
6-1. POWER PCB Ass’y Voltage
adjustment (Va, Vs voltage adjustment)
(1) Test equipment : D.M.M 1EA
(2) Connection Diagram for Measuring : refer to fig.1
(fig.1 : Power PCB Assy Voltage adjustment)
6-2. Adjustment method
(1) Vs adjustment (refer fig.1)
1) Connect + terminal of D.M.M. to Vs pin of
P812(42”:P811), connect -terminal to GND pin of
P812(42”:P811)
2) After turning VR9 1, voltage of D.M.M adjustment as
same as Vs voltage which on label of panel left/top (
deviation ; ± .5V)
(2) Va adjustment (refer fig.1)
1) After receiving 1 % Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of
P812(42”:P811), connect -terminal to GND pin of
P811(42”:P812).
3) After turning VR5 2,voltage of D.M.M adjustment as
same as Va voltage which on label of panel left/top
(deviation; ± .5V)
7. DDC EDID Write MODEL NAME: LG TV (Not necessary)
Caution: Please only check write status in Instart-menu
7-1. Manual Download(using DFT)
PC(for communication through RS-232C), UART baud rate:
1152 bps
Command : aa (Start Factory mode)
Command : ae 1 (Download All EDID)
Command : aa 9 (End of Factory mode)
7-2. Manual EDID D/L using Service Remocon
(1) After enter Service Mode by pushing “ADJ” key, select “4.
EDID D/L”.
(2) Finally execute “START” by pushing “G” or “9”key.
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< XPOWER4 42T3 PSU >

7-3 HD EDID DATA
RGB EDID DATA
HDMI-1 EDID DATA
HDMI-2 EDID DATA
HDMI-3 EDID DATA
8. Adjustment of White Balance
Caution: Press the POWER ON EY on R/C before W/B adjustment.
8-1. Test Equi ment
- Color Analyzer(CS-1000, CA-100+(CH.10), CA-210(CH.10) )
[Please adjust CA-100+ / CA-210 by CS-1000 before measuring
--> You should use Channel 10 which is Matrix compensated
(White, Red, Green, Blue revised) by CS-1000 and adjust
in accordance with White balance adjustment coordinate.
OColor temperature standards according to CSM and Module
OChange target luminance and range of the Auto adjustment
W/B equipment.
OWhite balance adjustment coordinate and color temperature
8-2. Connecting Picture of the Measuring
Instrument (On Automatic control )
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push control R/C ADJ ey‡ Enter the mode
of White-Balance, the pattern will come out.
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0.0030.0030.003
[ PC (for communication through RS-232C) ==> UART Baud rate : 115200 bps
3uv
0.329±0.0020.329±0.0020.329y
0.313±0.0020.313±0.0020.313x
CA-210 (CH.10)CA-100+ (CH.10)CS-1000Warm
0.0000.0000.0003uv
0.293±0.0020.293±0.0020.293y
0.285±0.0020.285±0.0020.285x
CA-210 (CH.10)CA-100+ (CH.10)CS-1000
Medium
0.0000.0000.0003uv
0.283±0.0020.283±0.0020.283y
0.276±0.0020.276±0.0020.276x
CA-210 (CH.10)CA-100+ (CH.10)CS-1000Cool
Target luminance 65
Range 20

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8-3. Auto-co trol i terface a d directio s
(1) Adjust in the place where the in lux o light like loodlight
around is blocked. (illumination is less than 10ux).
(2) In case o PDP: Measure and adjust a ter sticking the
Color Analyzer (CA-100+, CA210 ) to the side o the
module.
In case o LCD: Adhere closely the Color Analyzer
(CA210) to the module less than 10cm distance, keep it
with the sur ace o the Module and Color Analyzer’s Prove
vertically.(80~100°).
(3) Aging time
1) A ter aging start, keep the power on (no suspension o
power supply) and heat-run over 5 minutes.
2) In case o PDP, keep white pattern using inside pattern.
3) In case o LCD, using ’no signal’ or ‘ ull white pattern’ or
the others, check the back light on.
OAuto adjustment Map(RS-232C)
8-4. Ma ual white Bala ce
(1) Press the POWER ON KEY on R/C or adjustment and
heat run over 5 minutes.
(2) Zero Calibrate CA-100+ / CA-210, and when controlling,
stick the sensor to the center o PDP module sur ace.
(3) Press the ADJ KEY on R/C and enter EZ ASJUST
Select “3.W/B ADJUST” and press ENTER(V)
Set test-pattern on and display inside pattern.
(4) Control is carried out on three color temperatures, COOL,
MEDIUM, WARM.(Control is carried out three times)
< Temperature: COOL >
- R-o set / G-o set / B-o set is set to 128
- Control R-Gain and G-Gain.
- Each gain is limited to 192
< Temperature: MEDIUM >
- R-o set / G-o set / B-o set is set to 128
- Control R-Gain and G-Gain.
- Each gain is limited to 192
< Temperature: WARM >
- R-o set / G-o set / B-o set is set to 128
- Control G-Gain and B-Gain.
- Each gain is limited to 192
9. HDCP SETTING(Not necessary)
Caution: Key is saved in external eeprom.
10. RS-232C
Press In-start key and select 4.Baud Rate menu. Check RS-
232C a ter changing Baud Rate 115200.
11. TOOL OPTION
11-1. Usi g DFT(Auto)
PC ( or communication through RS-232C) UART Baud rate :
115200 bps
Command : ab 00 00 DATA(Model Number(hexadecimal))
11-2. Setti g Ma ual
Press ADJ R/C In-start key and select 0.TOOL OPTION,
Select Model Number by using R/C number(0~9) key or select
Model Number by using F/G(VOL +/-) in accordance with
destination.
Finally press 9(enter) key.
RS-232C COMMAND CENTER
[CMD ID DATA] MIN (DEFAULT) MAX
Cool Mid Warm Cool Mid Warm
R Gain jg Ja jd 00 192 192 192 255
G Gain jh Jb je 00 192 192 192 255
B Gain ji Jc j 00 192 192 192 255
R Cut 128 128 128 255
G Cut 128 128 128 255
B Cut 128 128 128 255
ITEM DATA(Model Number) Model
TOOL OPTION 3 50PT35*-U*
4 42PT35*-U*
6 50PV45*-U*
8 60PV45*-U*
12 42PT35*-U*
13 50PT33*-U*
14 50PV40*-U*
15 60PV40*-U*
16 50PV43*-U*
17 60PV43*-U*
18 42PT20*-U*
19 50PT20*-U*
20 42PT25*U-U*
21 50PT25*U-U*
22 50PV55*U-U*
23 60PV55*U-U*
30 Z42PT32*-U*
31 Z50PT32*-U*
32 Z50PV22*-U*
33 Z60PV22*-U*

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12. AREA OPTION
12-1. Usi g DFT(Auto)
PC ( or communication through RS-232C) ==> UART Baud
rate : 115200 bps
Command : ah 00 00 DATA(Area Number(hexadecimal))
12-2. Setti g Ma ual
Press ADJ R/C In-start key and select 1.AREA OPTION,
Select Model Number by using F/G(VOL +/-) in accordance
with destination
12-3. Outgoi g co ditio Co figuratio
- A ter all unction test, press IN-STOP Key by SVC Remote
controller. And Make Ship Condition.
- When pressing IN-STOP key by SVC remocon, Red LED
are blinked alternatively. And then Automatically turn o .
(Must not AC power OFF during blinking)
12-4. I ter al pressure
Con irm whether is normal or not when between power
board's ac block and GND is impacked on 1.5kV(dc) or
2.2kV(dc) or one second
13. Default Service optio .
13-1. ADC-Set.
VR-Gain adjustment Value (de ault 128)
VG-Gain adjustment Value (de ault 128)
VB-Gain adjustment Value (de ault 128)
VR-O set adjustment Value (de ault 64)
VG-O set adjustment Value (de ault 64)
VB-O set adjustment Value (de ault 64)
13-2. White bala ce.
CENTER (DEFAULT) MAX
Cool Mid Warm
R Gain 184 192 192 255
G Gain 189 184 150 255
B Gain 192 161 128 255
R Cut 128 128 128 255
G Cut 128 128 128 255
B Cut 128 128 128 255

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BLOCK DIAGRAM

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EXPLODED VIEW
900
910
203
590
204
601
207
520
400
200
240
580
301
305
120
300
206
202
205
302
303
304
501
602
201
570
Many electrical and mec anical parts in t is c assis ave special safety-related c aracteristics. T ese
parts are identified by in t e Sc ematic Diagram and EXPLODED VIEW.
It is essential t at t ese special safety parts s ould be replaced wit t e same components as
recommended in t is manual to prevent X-RADIATION, S ock, Fire, or ot er Hazards.
Do not modify t e original design wit out permission of manufacturer.
IMPORTANT SAFETY NOTICE
A10 A9
LV1
A12
A21
A2
A4

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

Copyright © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only