LG 32FZ4D-UA, 30FZ4D User Manual 2

COLOR TV

SERVICE MANUAL

CAUTION

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

CHASSIS : AC-02SC

MODEL : 30FZ4D

MODEL : 32FZ4D-UA

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

: http//lgservice.com/techsup.html

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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 TV receiver 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.

X-RAY Radiation

Warning:

To determine the presence of high voltage, use an accurate
high impedance HV meter.

Adjust brightness, color, contrast controls to minimum.
Measure the high voltage.
The meter reading should indicate

23.5

!1.5KV: 14-19 inch, 26!1.5KV: 19-21 inch,

29.0

!1.5KV: 25-29 inch, 30.0 ! 1.5KV: 32 inch

If the meter indication is out of tolerance, immediate service
and correction is required to prevent the possibility of
premature component failure.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc.,
to be sure the set is safe to operate without damage of
electrical shock.

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 [phone]

The source of X-RAY RADIATION in this TV receiver is the
High Voltage Section and the Picture Tube.
For continued X-RAY RADIATION protection, the
replacement tube must be the same type tube as specified in
the Replacement Parts List.

IMPORTANT SAFETY NOTICE

0.15uF

To Instrument's
exposed
METALLIC PARTS

AC Volt-meter

Good Earth Ground
such as WATER PIPE,
CONDUIT etc.

1.5 Kohm/10W

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DESCRIPTION OF CONTROLS...........................................4

SPECIFICATIONS.................................................................9

ADJUSTMENT INSTRUCTION...........................................10

BLOCK DIAGRAM...............................................................16

EXPLODED VIEW...............................................................20

EXPLODED VIEW PARTS LIST.........................................21

REPLACEMENT PARTS LIST............................................22

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

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

TABLE OF CONTENTS

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Front Panel Controls

ON/OFF
Index
Remote control sensor
Standby indicator (Illuminates brightly when the TV is in

standby mode. Dims when the TV is switched on.)

TV/VIDEO
MENU
VOL left/ right

Volume(

GG

) button increases the sound level and vol-

ume(

FF

) button decreases the sound level.

CH (Channel) up / down

1
2

3
4

These buttons work just as they do on
your remote control.

5
6

7

1

2

4

3

7

8

5

6

8

DESCRIPTION OF CONTROLS

ON/OFF

TV/VIDEO

MENU

VOL

CH

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Rear Connections Panel

Mini glossary

JACK A connection on the back of a TV, VCR, or any other A/V device. This includes the RF jack and the Audio/Video jacks that are

color-coded.

SIGNAL Picture and sound traveling through cable, or over the air, to your television screen.

S-Video In
A connection available
with some high-end
equipment that pro­vides even better pic­ture quality for Video 1,

2.

RF Connectors:
Cable, Antenna
Used to connect
cable or antenna
signals to the televi­sion, either directly
or through your
cable box.

Video 1 and 2 Inputs
Connects the video sig­nals from various types
of equipment.

Y, P

B, PR

DVD Component Video and HD
Component Video
Some top-of-the-line DVD players
use what is called “component
video,” for extremely accurate pic­ture reproduction. Refer to your
DVD manual for further information.

Connecting external equipment to your TV.

Monitor Out
Connects to a sec­ond TV or Monitor.

Left/Right Audio
Used for stereo sound
from various types of
equipment.

Component Left/Right
Audio
Used for stereo sound
from various types of
equipment.

Variable Audio Out
Used to connect
either an external
amplifier, or add a
sub-woofer to your
surround sound sys­tem.

HDMI/DVI

Used to connect

from a DTV

source.

Digital Audio

Output Optical

Connects to exter-

nal audio equip-

ment like a home

theater system.

Digital Audio Input

Optical
Connects to digital
audio from various

types of equipment.

DESCRIPTION OF CONTROLS

CALIBRATION

ANTENNA

DIGITAL
AUDIO OUTPUT
OPTICAL

CABLE

+75 Ω +75 Ω

DIGITAL
AUDIO INPUT
OPTICAL
(DVI)

HDMI/DVI

COMPONENT1

COMPONENT2

(480i/480p/720p/1080i)

R

AUDIO

P

PB

Y

L

R

DVD/DTV INPUT

R

AUDIO

L

PR

PB

Y

AUDIO

VIDEO

L(MONO) R

MONITOR
OUTPUT

S-VIDEO

INPUT

IN2

IN1

VARIABLE

AUDIO

L

AUDIO

R

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Side Connections Panel

Side A/V Panel

S-VIDEO

VIDEO IN

L/MONO

AUDIO

R

FRONT VIDEO

There are four jacks on the lower-right front
side of your TV that make connecting
Audio/Video devices like video games and
camcorders very simple.

The jacks are like those found on the back
jack connection panel. This means that most
equipment that connects to those types of
jacks on the rear jackpack, may be connected
to the Side connection panel (FRONT VIDEO).

To use the Side jacks as the signal source,
select them using Input source menu as
described on page 25. They will be named
“front Video” in the Input source menu.

Left/Right Audio
Used for stereo sound
from various types of
equipment.

Video in
Connects the video
signals from any
piece of equipment.

S-Video
A connection available on some very
high-end equipment that provides bet­ter picture quality than video input.

When you select Side video or

Side S-Video, the Front Audio

inputs are automatically select-

ed as well.

Do not connect to both Video
and S-Video at the same time.
Connect either Video or S­Video only.

Mini glossary

A/V CABLES Audio/Video cables. Three cable connector—Right audio (red), Left audio (white), and Video (yellow). A/V cables are used

for stereo playback of videocassettes and for higher quality picture and sound from other A/V devices.

A/V DEVICE Any device that produces video (picture) and/or audio (sound) (VCR, DVD, cable box, or television).

DESCRIPTION OF CONTROLS

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Remote Control Functions in TV Mode

1 2 3
4 5 6
7 8 9

0

TV

MODE

INDEX

POWER

TV INPUT

COMP1

FRONT

VCR

CABLE

DVD

SAT

MUTE

SURROUNDFREEZE SAP

RATIO

INFO

RECORD

STOP

PAUSE

REW

PLAY

FF

MENU EXIT

TIMER CC

SIGNAL

VOL

CH

FAV

EZ SOUND

EZ PIC

HDMICOMP2

TV/VIDEO

SKIP

DASH(-)

FLASHBK

FAV

Use to scroll the FAV chan­nel list.

MENU

Brings up the main

menu to the screen.

EXIT

Clears all on-screen dis­plays and returns to TV
viewing from any menu.

CC

Lets you select a closed caption
mode for displaying captioning
information when provided for
DTV/Analog signal.

EZ PIC

Adjusts the factory preset picture depend­ing on the viewing environment.

SAP

Selects MTS sound: Mono,
Stereo, and SAP.
Change the audio language in
DTV mode.

SURROUND

Selects : Off, 3D
EchoSound System and
SRS TruSurround XT.

MUTE

Switches the Mute or the EZ mute.

Mute: The sound is off. EZ mute: The

sound is off, and the caption is display.

THUMBSTICK

Allows you to navigate the on-screen

menus and to adjust the system set­tings and preferences, by moving to an
option with

F G

and selecting the high-

lighted option with .

TV INPUT

Selects: TV and CATV.

MODE

Selects the remote operating
mode: TV, VCR, Cable, DVD or
Satellite. Select other operating

modes, for the remote to oper-

ate external devices.

TV/VIDEO

Selects: Antenna, Cable, Video1,

Video2, Front video, Component 1-2

and HDMI/DVI input sources.

COMP1

Selects the Component 1
input source.

EZ SOUND

Adjusts the factory preset

picture according to the

room.

FREEZE

Captures and freezes

the currently-viewed

picture.

RATIO

Changes the aspect ratio.

INDEX

Switches LED Display on or off.

MODE INDICATOR
LIGHTS

Show active remote mode
every time any button is
pressed.

D
E

DESCRIPTION OF CONTROLS

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Remote Control Functions in TV Mode

1 2 3

4 5 6

7 8 9

0

TV

MODE

INDEX

POWER

TV INPUT

COMP1

FRONT

VCR

CABLE

DVD

SAT

MUTE

SURROUNDFREEZE SAP

RATIO

INFO

RECORD

STOP

PAUSE

REW

PLAY

FF

MENU EXIT

TIMER CC

SIGNAL

VOL

CH

FAV

EZ SOUND

EZ PIC

HDMICOMP2

TV/VIDEO

SKIP

DASH(-)

FLASHBK

POWER

Turns your TV or any other
programmed equipment on
or off, depending on mode.

CHANNEL UP/DOWN

Scrolls through available chan­nels present in EZ Scan memory.

NUMBER KEYPAD

For direct channel selection and

programming functions.

ENTER

When in the menu system
and other on-screen dis­plays, selects highlighted
options.

RECORD, PAUSE, REW,

FFWD, PLAY, STOP

Control the functions on your VCR.

VOLUME UP/DOWN

Increases/decreases the sound

level.

INFO

When you watch the TV, dis-

plays information on top of the

screen. Not available in

Component 1-2 and HDMI/DVI.

SKIP LEFT/RIGHT

Playing CDs: Selects
songs.
Playing DVDs: Selects
movie chapters.

COMP2

Selects the Component 2 input

source.

HDMI

Selects the HDMI input source.

DASH(-)

Is used to enter a program

number for multiple program

channels such as 2-1,2-2,etc.

FLASHBK

Use to scroll the recent chan­nel list.

TIMER

Lets you select the amount

of time before your TV

turns itself off automatically.

SIGNAL

Displays the digital signal
strength.

FRONT

Selects the front video
input source.

DESCRIPTION OF CONTROLS

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Model 32FZ4D-UA

Horizontal Size (inches) 37.17
Height (inches) 21.77
Thickness (inches) 23.66

Weight (pounds) 125.7
Power requirement AC 120V~ 60Hz
Television system American TV Standard, NTSC, ATSC with STB
Television Channel VHF: 2 - 13

UHF: 14 - 69
CATV: 1 - 135

CADTV: 1 - 135
Power consumption (W) 210W
Antenna 75 ohm external terminal for VHF/UHF
Audio Output (W) 7W x 2
Supplied accessories Remote control, batteries 2 size AA(Alkaline battery)
Screen Aspect Ratio 16 : 9
External input ports Video/Audio input (3 set)

Video output (1 set)

S-Video input (2)

Component input (2 set)

Variable audio output (1 set)

HDMI/DVI input (1)

Digital audio optical input (2)

Digital audio optical output (1)

Calibration port (1)

Cable/Antenna port

Design and specifications are subject to change without prior notice.

Product Specifications

SPECIFICATIONS

- 10 -

1. Application Object

These instructions are applied to the AC-02SA/C chassis.

2. Notes

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of an isolation

transformer will help protect test instruments.
(2) Adjustments must be done in the correct order.
(3) The input voltage of the receiver must remain at

120V±10% while adjusting.
(4) The receiver must be operated for about 20 minutes prior

to the adjustment.

[ Never operate the set over 10 minutes with a still picture

because a fluorescent material may get damage.

3. Focus Adjustment

(1) Set Picture condition to “APC ON”.

CONTRAST : 100
BRIGHT : 50

APC ON TINT : 55

COLOR : 0

SHARPNESS : 55

(2) Set the Aspect ratio to Wide Mode.
(3) Receive a Cross Hatch Pattern, adjusting the FOCUS

Knob on the flyback transformer for the best focus in the

area designated “A” above.

[ Heat run over 15 minutes before adjustment.

4. CUT-OFF Adjustment
(Screen Voltage Adjustment)

4-1. Test equipment

(1) Service remote control
(2) Oscilloscope(100:1) Probe

4-2. Adjustment

(1) Select EZ Adjust 3. CUT-OFF, by pressing the ADJ key on

the SVC Remote control.
When it enters to adjustment mode, the pattern from a
signal generator is being selected, it becomes with Normal
image 16:9 and the CUT-OFF DRIVE data setting 31.

(2) Connect the oscilloscope ground lead to GND on the CPT

board and the probe to the GK pin connector of the CPT
socket.
Using the SCREEN knob on the Flyback Transformer,
adjust the black level voltage to 180±2V.

5. Deflection Adjustment

5-1. Preliminary Steps

Select EZ Adjust 1. Raster, Cent, H/V Size by using the ADJ
key on the SVC Remote control.
In the adjustment mode a Digital Pattern signal signal is
displayed.

5-2. Raster V-Center(V.Center) Adjustment

Select 62. V-Postition in the adjustment mode and adjust it to
position the vertical center line in vertical center of the CPT.

5-3. Vertical Deflection Size Adjustment

(Overscan : 10%)

(1) Select 59. V-SIZE in the adjustment mode.
(2) Adjust until the smaller inscribed circle coincides with the

outer frame of screen.

(3) Select 95. LO-VLIN or 94. UP-VLIN and adjust until the

larger inscribed circle coincides with the outer frame of
screen.

ADJUSTMENT INSTRUCTIONS

A

180±2V

CUT-OFF Adjustment

(SCREEN voltage adjustment OSCILLOSCOPE, 100:1
PROBE, VOLTS/DIV : 0.5V/DIV SEC/DIV : 5us, The TRIGGER
MODE it puts in the TV-H)

LO-VLIN UP-VLIN

5-4. Raster H-center(H.CENTER) Adjustment

Select 77. H Postion in the adjustment mode and adjust until
left and right screen are symmetrically equal.

5-5. Horizontal Deflection Size Adjustment

(1) Reduce 66 H-Size to verify screen protection (overscan)

on the right and left sides.

(2) Adjust the horizontal size, using a test pattern.

5-6. Horizontal Pincushion Adjustment

(1) Select EZ Adjust 2. Pin-Cushion by pressing the ADJ key

on the SVC Remote control.

(2) Select PIN-PHASE, PIN-AMP, AFC-BOW, AFC-ANGLE,

UP-CPIN, LO-CPIN in the adjustment mode and adjust
until there is no Pincushion distortion or trapezoid
distortion on the screen.

6. Component AD9883A Offset/Gain
Adjustment

6-1. Test equipment

(1) SVC Remote Control,
(2) 801GF(802B, 802F, 802R) pattern generator

6-2. Preliminary Steps

(1) Turn the power supply on.
(2) Enter the Component mode.
(3) Receive the 1080I, Hoz30Bar Pattern of the 801GF.

6-3. ADC Offset Adjustment

(1) After receiving a signal press the ADJ Key on the SVC

Remote Control repeatedly to acess the Adjustment mode.

(2) #9. Set Adjustment will set the AD9883A automatically.

7. White Balance Adjustment

Perform the screen adjustment first.
Color Temp must be adjusted from Medium Mode.
(The image condition must be adjusted from Normal condition)
Manual adjustment is also possible by the following sequence.

(1) Receive White Pattern.
(2) Set screen size to wide mode
(3) Select EZ Adjust 4. White Balance on the SVC Remote

control.

(4) Adjustment

1. Set an image with Normal image.

2. Adjust R-DRIVE and B-DRIVE data so the color
coordinates in High light are the values in Table below.
(bright level : 25Ft_L)

3. Adjust “CONTRAST” and “BRIGHT” so the bright level is

4.5±0.5Ft_L.

4. Adjust R-CUT and B-CUT data so the color coordinates
in Low light are the values in Table below.

5. Repeat 1 ~ 4 until the color coordinates in High and Low
color satisfies the Table.

6. Check the adjusted color coordinates with the white
balance meter.

High Light : x=287

!

3, y=293!3

Low Light : x=287

!

3, y=293!3

Color temperature : 9,000K!

1000(-5MPCD)

[ The White Balance it executes from automatic adjustment

hour Normal image condition.
Start adjustments from initial setting of R.DRIVE=31,
G.DRIVE=31, B.DRIVE=31, R.CUT=31, G.CUT=31,
B.CUT=31.

8. Sub Bright, TINT, COLOR Adjustment

8-1. Sub Bright Adjustment

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ADJUSTMENT INSTRUCTIONS

<1080I Hoz30Bar Pattern>

0 12 3 4 5 76 8 9

US14CH