LG 50PG30 Series User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PU84C
MODEL : 50PG30 50PG30F-UA
CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//biz.lgservice.com
Internal Use Only
CH
VOL
MENU
INPUT ENTER

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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 lsolation 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 circuitary that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace it
with the same specified type.
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 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 positioin, 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 1MΩand 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 esposed 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 sepcified, 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
CANADA: LG Electronics Canada, Inc. 550 Matheson
Boulevard East Mississauga, Ontario L4Z 4G3
USA : LG Customer Interactive Center
P.O.Box 240007, 201 James Record Road Huntsville,
AL 35824
Digital TV Hotline [phone]
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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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SPECIFICATIONS.................................................................4
ADJUSTMENT INSTRUCTIONS ..........................................5
TROUBLE SHOOTING GUIDE...........................................11
BLOCK DIAGRAM...............................................................42
EXPLODED VIEW...............................................................44
EXPLODED VIEW PARTS LIST.........................................45
SCHEMATIC DIAGRAM......................................................46
PRINTED CIRCUIT BOARDS.............................................54
TABLE OF CONTENTS

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
nThe specifications shownabovemay be changed without prior notice for quality improvement.
MODELS
AC100-240V ~ 50/60Hz
NTSC-M, ATSC, 64 & 256 QAM
VHF 2-13, UHF 14-69,CATV 1-135, DTV 2-69, CADTV 1-135
75 ohm
32 ~ 104¡F (0 ~ 40¡C)
Less than 80%
-4 ~ 140¡F (-20 ~ 60¡C)
Less than 85%
Dimensions
(Width x Height
x Depth)
Weight
Power requirement
Television System
ProgramCoverage
External Antenna Impedance
Environment
condition
With stand
Without stand
With stand
Without stand
Operating Temperature
Operating Humidity
Storage Temperature
Storage Humidity
50PG10 (50PG10-UA)
NS-50PDP-09 (50PG1DD-UA)
MODELS 50PG30
(50PG30F-UA) 60PG30 (60PG30F-UA)
48.2 x 33.4 x 14.3 inches
1224.7 x 849.0 x 364.0 mm
48.2 x 31.1 x 3.2 inches
1224.7 x 790.0 x 83.6 mm
91.4 pounds / 41.5 kg
83.9 pounds / 38.1 kg
50PG20 (50PG20-UA)
50PG20C (50PG20C-UA)
48.2 x 33.4 x 14.3 inches
1224.7 x 849.0 x 364.0 mm
48.2 x 31.1 x 3.3 inches
1224.7 x 790.0 x 86.0 mm
90.8 pounds / 41.2 kg
83.3 pounds / 37.8 kg
Dimensions
(Width x Height
x Depth)
Weight
With stand
Without stand
With stand
Without stand
48.5 x 33.4 x 14.3 inches
1232.0 x 850.0 x 363.6 mm
48.5 x 31.2 x 3.3 inches
1232.0 x 793.0 x 84.0 mm
93.2 pounds / 42.3 kg
84.4 pounds / 38.3 kg
57.7 x 39.7 x 16.2 inches
1468.0 x 1009.1 x 413.9 mm
57.7 x 37.3 x 3.4 inches
1468.0 x 949.5 x 88.5 mm
177.6 pounds / 80.6 kg
160.0 pounds / 72.6 kg
SPECIFICATIONS

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS
1. Application Range
This spec. sheet is applied to all of the PU84A, PU84C chassis.
2. Specification
(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±5cC 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.
Caution : 42 inch must keep 100 ~ 120V, 50/60Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment.
OAfter RGB Full White in HEAT-RUN Mode, the receiver must
be operated prior to the adjustment.
OEnter into HEAT-RUN MODE
(1) Press the POWER ON KEY on R/C for 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 ) of HEAT RUN
MODE uses to check panel.
Caution: If you turn on a still screen more than 20 minutes
(Especially digital pattern, cross hatch pattern), an after
image may be occur in the black level part of the
screen.
Caution: Set up “RF mode(noise)” after PCB assembly adjustment.
3. Download
(1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
(2) Set as below, and then click “Auto Detect” and check “OK”
message If display “Error”, Check connect computer, jig,
and set.
(3) Click “Connect” tab. If display “Can’t” , Check connect
computer, jig, and set.
(4) Click “Read” tab, and then load download file(XXXX.bin)
by clicking “Read”
(5) Click “Auto” tab and set as below
(6) Click “Run”.
(7) After downloading, check “OK” message.

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4. ADC Process
4-1. PC Input ADC
(1) Auto RGB Gain/Offset Adjustment
1) Convert to PC in Input-source
I2C COMMAND: 0xF4 (SELECT_INPUT) 0x00 0x60
(RGB)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),
0x60(RGB), 0x90(HDMI)
2) Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 29 in Pattern Generator (MSPG-925 SERISE)
[gray pattern that left & right is black and center is white
signal (Refer below picture)].
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction.
(2) Confirmation
1) We confirm whether “0xB6(RGB)” address of EEPROM
“0xA2” is “0xAA” or not.
2) If “0xB6(RGB)” address of EEPROM “0xB2” isn’t “0xAA”,
we adjust once more
3) We can confirm the ADC values from
“0xB0~0xB5(RGB)” addresses 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 “0. ADC CALIBRATION “.
4-2. COMPONENT Input ADC
(1) Component Gain/Offset Adjustment
1) Convert to Component in Input-source
I2C COMMAND : 0xF4 (SELECT_INPUT) 0x00 0x40
(COMPONENT)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),
0x60(RGB), 0x90(HDMI)
2) Signal equipment displays
Impress Resolution 480i
MODEL : 209 in Pattern Generator(480i Mode)
PATTERN : 8 in Pattern Generator(MSPG-925 SERISE)
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
4) Signal equipment displays
Impress Resolution 1080i
MODEL : 223 in Pattern Generator(1080i Mode)
PATTERN : 8 in Pattern Generator(MSPG-925 SERISE)
5) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
[Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “G” key at “0. ADC CALIBRATION”.
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS

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4-3. Confirmation
(1) We confirm whether “0xBF(480i)/0xC8(1080i)” address of
EEPROM “0xA2” is “0xAA” or not.
(2) If “0xBF(480i)/0xC8(1080i)” address of EEPROM “0xA2”
isn’t “0xAA”, we adjust once more
(3) We can confirm the ADC values from “0xB9 ~ 0xBE(480i) /
0xC2 ~ (1080i)” addresses in a page “0xA2”
[Manual ADC Confirmation using Service Remocon. After enter
Service Mode by pushing “INSTART” key.
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.
5. POWER PCB Ass’y Voltage
Adjustment(Va, Vs voltage Adjustment)
5-1. Test Equipment:D.M.M 1EA
5-2. Connection Diagram for Measuring
Refer to Fig.1, Fig 2, Fig 3
5-3. Adjustment Method
(1) 50” Va Adjustment (refer fig.1)
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P802,
connect-terminal to GND pin of P802.
3) After turning VR902,voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top
(deviation; ±0.5V)
(2) 50” Vs Adjustment (refer fig.1)
1) Connect + terminal of D.M.M. to Vs pin of P802, connect
-terminal to GND pin of P802.
2) After turning VR901, voltage of D.M.M adjustment as
same as Vs voltage which on label of panel right/top
(deviation ; ±0.5V)
(3) 42” Va Adjustment (refer fig.2)
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)
(4) 42” Vs Adjustment (refer fig.2)
1) Connect + terminal of D. M..M. to Vs pin of P811,
connect -terminal to GND pin of P811.
2) After turning VR951, voltage of D.M.M adjustment as
same as Vs voltage which on label of panel right/top
(deviation ; ±0.5V)
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS
(Fig. 1) 50inch Power PCB Assy Voltage Adjustment
(Fig. 2) 42inch Power PCB Assy Voltage Adjustment

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
(5) 60” Va Adjustment (refer fig.3)
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P11, connect
-terminal to GND pin of P11.
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)
(6) 60” Vs Adjustment (refer fig.3)
1) Connect + terminal of D. M..M. to Vs pin of P11, connect
-terminal to GND pin of P11.
2) After turning VR951, voltage of D.M.M adjustment as
same as Vs voltage which on label of panel right/top
(deviation ; ±0.5V)
ADJUSTMENT INSTRUCTIONS
vVS
GND
GND
DMM
Va
5V
(Fig. 3) 60inch Power PCB Assy Voltage Adjustment

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6. DDC EDID Write (MODEL NAME: LG TV)
Caution: Press the POWER ON KEY on R/C before EDID download.
EDID download is processed automatically through RS-232C
PC(for communication through RS-232C), UART baud rate:
115200 bps
OEDID Download Protocol (RS-232C)
OHDMI-1 EDID DATA
OHDMI-2 EDID DATA
OHDMI-3 EDID DATA
ORGB EDID DATA
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS

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7. Adjustment of White Balance
Caution: Press the POWER ON KEY on R/C before W/B adjustment.
7-1. Test Equipment
- 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
7-2. 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 Key—> Enter the
mode of White-Balance, the pattern will come out.
7-3. 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) In case of PDP: Measure and adjust after sticking the Color
Analyzer (CA-100+, CA210) to the side of the module.
In case of LCD: Adhere closely the Color Analyzer (
CA210 ) to the module less than 10cm distance, keep it
with the surface of the Module and Color Analyzer’s Prove
vertically.(80~100°).
(3) Aging time
1) After aging start, keep the power on (no suspension of
power supply) and heat-run over 5 minutes.
2) In case of PDP, keep white pattern using inside pattern.
3) In case of LCD, using ’no signal’or ‘full white pattern’or
the others, check the back light on.
OAuto Adjustment Map(RS-232C)
7-4. Manual White Balance
1) Press the POWER KEY on R/C for adjustment and heat
run over 5 minutes.
2) Zero Calibrate CA-100+ / CA-210, and when controlling,
stick the sensor to the center of PDP module surface.
3) Press the ADJ KEY on R/C and enter EZ ASJUST
Select “3. W/B ADJUST”and press ENTER(A).
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-offset / G-offset / B-offset is set to 128
- Control R-Gain and G-Gain.
- Each gain is limited to 192
<Temperature: MEDIUM>
- R-offset / G-offset / B-offset is set to 128
- Control R-Gain and G-Gain.
- Each gain is limited to 192
<Temperature: WARM>
- R-offset / G-offset / B-offset is set to 128
- Control G-Gain and B-Gain.
- Each gain is limited to 192
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS

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8. HDCP(High-Bandwidth Digital
Contents Protection) SETTING
(1) Connect D-sub Signal Cable to D-Sub Jack
(2) Input HDCP key with HDCP-key- in-program
(3) HDCP Key value is stored on EEPROM(AT24C512) which
is 80~A1 addresses of 0xA0~0xA2 page
(4) AC off/ on and on HDCP button of MSPG925 and confirm
whether picture is displayed or not of using MSPG925
(5) HDCP Key value is different among the sets.
9. RS-232C
Press In-start key and select 3.Baud Rate menu. Check RS-
232C after changing Baud Rate 115200.
10. OPTION
(1) Press ADJ R/C In-start key and select 0.AREA OPTION
(2) Select Country by using F/G(VOL +/-) in accordance with
destination
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE

- 13 -
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE
Power-Up Boot Fail Trouble Shooting
Check P701 All
Voltage Level (16V, 5V) Check Power connector
OK ? Replace Power board
Y
NY
Check IC706 #2 Pin
Voltage Level 2.6V Replace IC706 &
Recheck
Y
N
Check X100 Clock
12MHz Replace 100
Y
N
Replace IC105 Flash Memory
Check Q706 Output
Voltage Level (5V) Replace Q801
N
Y

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE
No OSD Trouble Shooting
Check P302
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+) Maybe Mstar has problems
Check LVDS Cable
Check PDP Module
Control board
Refer to Module CAS
Y
N
Y
Replace Cable
N
Y
Check PDPVs,Va Voltage
Module 5V Replace Power
N
Check P701Disp_EN,
VaVs ON, 5V_MNT Check GPIO Path
N
Y

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE
No OSD Trouble Shooting (Module Power Sequence)
Normal Display
Vcc
(5V)
Va
Vs
DISPEN
TVaR
TVsR
TOn
TVaF
TVsF
TOff
☞1)
Power_on
3 Sec
Power_off
3 Sec
Min
100ms
Min.
2Frame (Recommend: 2 sec)
msec50090Falling Time of Vs (90% to 10%)TVsF
msec2000600
Time interval between 90% of Vcc and 90% of Vs
when Power On
Ton +
TVsR
msec800100Rising Time of Vs (10% to 90%)TVsR
msec30050Falling Time of Va (90% to 10%)TVaF
msec30010Rising Time of Va (10% to 90%)TVaR
msec-20
Time interval between 10% of Vs and 90% of Vcc
when Power Off
TOff
msec-500
Time interval between 90% of Vcc and 10% of Vs
when Power On
TOn
unitMax.Min.DescriptionSymbol

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE
Module Control Trouble Shooting
Check the PDP Module Control
Board Replace Module Control Board
N
Y
Check the IIC To IIC Test
- Debug Menu IIC Test Remove R330, R334
Check each IC sharing
IIC channel
N
Check P302 SCL,SDA line SCL,SDA
line R330, R334 Check Signal
N
Y
SCL (continue)
SDA (continue)
ACK
By Slave
9 1
D0
D7
9
ACK
By Slave
Command Data
for Addr Stop
By Master
D6
SCL 8
SDA 00
111 A7W
Start
By
Master
Chip ID Address Byte
(0x1C) ACK
By Slave
0
19 1
A6 A1 A0
Command Address
Addr=A[7:0]
0
Write
only
Master : Image Board
Slave :PDP Module

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE
Digital TV Video Trouble Shooting
Check RF Cable
Check TP Clock, Data, Sync
R440, R441, R442 Maybe Tuner(TU400) has problems
CheckMstar LVDS output
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Y
N
Check Tuner 5V Power
IC703 #5 Pin Replace IC703
Y
N
Y
Maybe Mstar(IC100) has problems
N
Y
Check LD400 color Bad Tuner. Replace Tuner.
None
Yellow --> none
Check Demodulator Input Clock
X400 (25MHz) Replace it
N
Y
Check PDP Module
Control board
Refer to Module CAS

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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
TROUBLE SHOOTING GUIDE