LG 32PC5DVC Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : PP78D

MODEL : 32PC5DVC 32PC5DVC-UG

CANADA : http//biz.lgservice.com USA : http//www.lgservice.com

: http//biz.lgservice.com

Internal Use Only

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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 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 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 1-800-243-0000

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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LGE Internal Use Only

SPECIFICATIONS.................................................................4

ADJUSTMENT INSTRUCTIONS ..........................................5

BLOCK DIAGRAM...............................................................10

EXPLODED VIEW...............................................................11

EXPLODED VIEW PARTS LIST.........................................12

SCHEMATIC DIAGRAM..........................................................

PRINTED CIRCUIT BOARDS.................................................

TABLE OF CONTENTS

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LGE Internal Use Only

The specifications shown above may be changed without prior notice for quality improvement.

32PC5DVC

(32PC5DVC-UG)

MODELS

32.3 x 23.8 x 10.1 inches

819.9 x 603.8 x 255.4 mm

32.3 x 21.8 x 3.1 inches

819.9 x 554.2 x 78.1 mm

36.8 pounds / 16.7 kg

34.8 pounds / 15.8 kg

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 Program Coverage External Antenna

Impedance

Environment condition

Including stand

Excluding stand

including stand excluding stand

Operating Temperature

Operating Humidity

Storage Temperature Storage Humidity

SPECIFICATIONS

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LGE Internal Use Only

ADJUSTMENT INSTRUCTIONS

1. Application Range

This spec sheet is applied to all of the PP78D 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 to protect test instruments. (2) Adjustment must be done in the correct sequence. (3) The adjustment must be performed at 25±5°C temperature

and 65±10% relative humidity if there is no specified

designation. (4) The input voltage of the receiver must be kept between

100~220V, 50/60Hz. (5) Before adjustment, execute Heat-Run for 30 minutes at RF

no signal.

3. ADC Calibration

3-1. PC input ADC

(1) Auto RGB Gain/Offset Adjustment

1) Convert to PC in Input-source

2) Signal equipment displays Output Voltage : 700 mVp-p Impress Resolution XGA (800 x 600 @ 60Hz) Model : 46 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 “Adjust-RGB”.

3-2. COMPONENT input ADC

(1) Component Gain/Offset Adjustment

1) Convert to Component in Input-source

2) Signal equipment displays

Impress Resolution 720P MODEL : 216 in Pattern Generator(720P Mode) PATTERN : 08 in Pattern Generator(MSPG-925 SERISE)

3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1) 0x00 0x02 instruction

(2) Confirmation

1) We confirm whether “0xC8(720P)” address of EEPROM “0xA2” is “0xAA” or not.

2) If “0xC8(720P)” 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”

MSPG-

925FA

Component

Model: 216

(720p@60Hz)

Model: 46

(800x600@60Hz)

RGB

Adjustment pattern (PC)

Adjustment pattern (COMPONENT)

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3-3. Function Check

(1) Check display and sound

1) Check Input and Signal items. (cf. work instructions)

1. TV

2. AV (CVBS/ S-Video)

3. COMPONENT (480i)

4. RGB (PC : 1024 x 768 @ 60hz)

5. HDMI

6. PC Audio In and H/P Out

* Display and Sound check is executed by Remote

controller.

4. EDID

[

Caution

(1) Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists

- Digital EDID : Pin3 exists

(2) Never connect HDMI & DVI-D & DVI-A Cable at the same

time.

(3) Use the proper cables below for EDID Writing

4-1. EDID Data

(1) 32PC5DV ANALOG(128 Bytes )

O BLOCK1 (128BYTE)

(2) 32PC5DV HDMI(256 Bytes)

O BLOCK1 (128BYTE)

O BLOCK2 (128BYTE)

(2) 32PC5DVC HDMI(256 Bytes)

O BLOCK1 (128BYTE)

O BLOCK2 (128BYTE)

LGE Internal Use Only

ADJUSTMENT INSTRUCTIONS

Caution: Each PCB assembly must be checked by check JIG set. (Because power PCB Assembly damages to PDP Module, especially be careful)

Item

Manufacturer ID

Version

Revision

Condition

GSM Digital : 1 Digital : 3

Hex Data

1E6D

01 03

For RGB EDID For HDMI EDID

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ⓐ Product ID

ⓑ Serial No

=> Controlled on production line

=> Controlled on production line:

ex) Monthly: ‘11’ -> ‘0B’

Year: ‘2006’ -> ‘10’

ⓓ Model Name/Monitor Name

ⓔ Checksum(7EH)

=> Changeable by total EDID data

4-2. 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.

4-3. Preparation for Adjustment

(1) As above (Fig. 1), Connect the Set, EDID Download Jig,,

PC & Cable (2) Turn on the PC & EDID Download Jig. And Execute the

S/W : EDID TESTER Ver.2.5 (3) Set up the S/W option

Repeat Number : 5

Device Address : A0

PageByte : 8

(4) Power on the Set

4-4. Sequence of Adjustment

DDC data of Analog-RGB

(1) Init the data

(2) Load the EDID data.(Open File).

(3) Set the S/W as below.

LGE Internal Use Only

ADJUSTMENT INSTRUCTIONS

TV set

or

Main B/D

(Fig. 1) Connection Diagram of DDC Download

Open FileOpen File

[Analog – RGB :

PP78D_RGB.ANA ]

[Digital – HDMI :

PP78D_HDMI.DVI ]

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(4) Push the “Write Data & Verify” button. And confirm “Yes”.

(5) If the writing is finished, you will see the “ OK” message.

5. HDCP(High-Bandwidth Digital Contents Protection)

(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

6. Adjustment of White Balance

6-1. Purpose and Principle for Adjustment

of the Color Temperature

(1) Purpose: Adjust the color temperature to reduce the

deviation of the module color temperature.

(2) Principle: To adjust the white balance without the

saturation, Fix the one of R/G/B gain to 80 and decrease the others.

6-2. Adjustment Mode

Two modes of Cool and Warm (Medium data is automatically calibrated by the cool data)

6-3. Required Equipment

(1) Remote controller for adjustment (2) Color Analyzer : CA100, CA-100+, CA-210 or same

product

- PLASMA TV(ch : 10)

(3) Auto W/B adjustment instrument(only for Auto adjustment)

6-4. Connecting Diagram of Equipment

for Measuring

(For Automatic Adjustment)

(1) Enter the adjustment mode of the white balance

1) Enter the white balance adjustment mode at the same time heat-run mode when pushing the power on by power only key

2) Maintain the white balance adjustment mode with same condition of Heat-run -> Maintain after AC off/on in status of Heat-run pattern display

(2) Release the white balance adjustment mode

1) Release the adjust mode after AC off/on or std-by off/on in status of finishing the Hear-run mode

2) Release the Adjust mode when receiving the aging off command(F3 00 00) from adjustment equipment

3) Need to transmit the aging off command to TV set after finishing the adjustment

LGE Internal Use Only

ADJUSTMENT INSTRUCTIONS

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O

Standard color coordinate and temperature when using the

CA-100+ or CA210 equipment

O

Synchronization relation between PSM and CSM

(3) DDC adjustment Command set

[ R/G/B GAIN max value : 80

6-5. Adjustment of White Balance for

Manual Adjustment

(1) Adjustment mode: Two modes of Cool (Dynamic) and

Warm(Mild) (Medium data is automatically calibrated by the cool data)

(2) Color analyzer(CA110) should be used in the calibrated ch

by CS-1000(PDP : CH10)

(3) Operate the zero-calibration of the CA-110 then stick

sensor to the module when adjusting.

(4) For manual adjustment, it is also possible by the following

sequence

1) Select white pattern of heat-run by pressing “POWER ON” key on remote control for adjustment then operate heat run longer than 15 minutes. (If not executed this step, the condition for W/B will be differ )

2) Changing to the av mode by remote control.(av mode)

3) Display the internal pattern of the Mstar IC by pushing the ADJ.

4) Stick sensor to center of the screen and select each items (Red/Green/Blue Gain and Offset) using

D/E

(CH

+/-) key on R/C.

5) Adjust R/ G/B Gain using

F/G (VOL +/-) key on R/C.

6) Adjust two modes of Cool(Dynamic) and Warm(Mild) as below figure. (Fix the one of R/G/B and change the others)

1. Push the one time the in-start key : Cool

2. Push the two more the in-start key : Warm

[ Refer to the below case to know what value is fixed.

[CASE] First adjust the coordinate much away from the target value (x, y).

1. x, y > target

Decrease the R, G.

2. x, y < target

1) First decrease the B gain,

2) Decrease the one of the others.

- In case of decreasing the x, decreasing the R : fix G

- In case of decreasing the y , decreasing the G : fix R

3. x > target , y < target

1) First decrease B, so make y a little more than the

target.

2) Adjust x value by decreasing the R

4. x < target , y > target

1) First decrease B, so make x a little more than the

target.

2) Adjust x value by decreasing the G

7) When adjustment is completed, Exit adjustment mode using EXIT key on R/C

LGE Internal Use Only

ADJUSTMENT INSTRUCTIONS

Color Coordinate

XY

0.283±0.003

0.293±0.003

0.329±0.00

3

11,000K

9,300K 6,500K

0.000

0.003

0.276±0.003

0.285±0.003

0.313±0.00

3

Cool

Medium

Warm

Mode

Temp

3uv

CSM Remark

Cool

Normal

Warm

Dynamic

Standard

Mild

PSM

Adjustment

Aging On/Off

Input select

R GAIN G GAIN

B GAIN R GAIN G GAIN

B GAIN

CMD(HEX)

F3

F4

16 18 1A 16 18 1A 16 18 1A

ADR

00

01

02

VALUE

255/00

00 - 255 00 - 255 00 - 255 00 - 255 00 - 255 00 - 255 00 - 255 00 - 255 00 - 255

Detail OO : OFF 01 : ON FF : WB Ready 0x10 : TV 0x20 : AV1 0x21 : AV2 0x23 : AV3 0x40 : Component1 0x50 : RGB DTV 0x60 : RGB PC 0x90 : HDMI1 DTV GAIN adjustment CSM COOL

GAIN adjustment CSM NORMAL

GAIN adjustment CSM WARM

Color Coordinate

XY

0.283±0.003

0.293±0.003

0.329±0.00

3

11,000K

9,300K 6,500K

0.000

0.003

0.276±0.003

0.285±0.003

0.313±0.00

3

Cool

Medium

Warm

Mode

Temp

3uv

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LGE Internal Use Only

BLOCK DIAGRAM

- 11 -

LGE Internal Use Only

EXPLODED VIEW

A21

A2

300

570

560

120

301

302

303

304

305

200

240

580

400

520

590

201

202

203

900

* Option

250

204

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. 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.

IMPORTANT SAFETY NOTICE