Funai LCD-A2706 Schematic

SERVICE MANUAL

27" COLOR LCD TELEVISION

LCD-A2706/LCD-B2706/

LCD-C2706/LCD-D2706

27″ COLOR LCD TELEVISION

LCD-A2706/LCD-B2706/

LCD-C2706/LCD-D2706

TABLE OF CONTENTS

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Important Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

How to Initialize the LCD Television. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Schematic Diagrams / CBA’s and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

The LCD panel is manufactured to provide many years of useful life.
Occasionally a few non active pixels may appear as a tiny spec of color.
This is not to be considered a defect in the LCD screen.

SPECIFICATIONS

< TUNER >

ANT. Input -----------------------75 ohm Unbal., F type
Reference Level ---------------20 Vp-p (LCD Green Cathode)
Test Input Signal---------------400 Hz 30% modulation

Description Condition Unit Nominal Limit

1. Intermediate Freq.

2. Color Killer Sens.

3. AFT Pull In Range (10 mV input) --- MHz ±2.4 ±2.1

Picture

Sound

CH-2
CH-10
CH-55

MHz
MHz

dBµV
dBµV
dBµV

45.75

41.25

17
17
17

---

---

23
23
23

< LCD PANEL >

Description Condition Unit Nominal Limit

1. Number of Pixels

2. Brightness cd/m

3. Response Time (tr+tf) --- msec 25 ---

4. Support Color --- - 16.7 mil. (8 bit) ---

5. Viewing Angle

Horizontal

Ver ti ca l

Horizontal

Ver ti ca l

pixels
pixels

°
°

1280× 3

720

2

550 ---

-85 to 85

-85 to 85

---

---

---

---

< VIDEO >

Description Condition Unit Nominal Limit

1. Over Scan

2. Color Temperature

3. Resolution

Horizontal

Ver ti ca l

--­x
y

Horizontal

Ver ti ca l

%
%

°K

line
line

5
5

12000

0.272

0.278

400
350

---

---

--­±0.03
±0.03

---

---

< AUDIO >

All items are measured across 8 Ω load at speaker output terminal with L.P.F.

Description Condition Unit Nominal Limit

1. Audio Output Power 10% THD: Lch/Rch W 5.0/5.0 4.5/4.5

2. Audio Distortion 500mW: Lch/Rch % 1.0/1.0 4.0/4.0

-

3. Audio Freq. Response

Note: Nominal specifications represent the design specifications. All units should be able to approximate these.

Some will exceed and some may drop slightly below these specifications. Limit specifications represent
the absolute worst condition that still might be considered acceptable. In no case should a unit fail to meet
limit specifications.

6dB: Lch

-

6dB: Rch

Hz
Hz

100 to 10 k
100 to 10 k

---

---

1-1 L5820SP

IMPORTANT SAFETY PRECAUTIONS

Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical
codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally
important to implement the following precautions when a set is being serviced.

Safety Precautions for LCD TV
Circuit

1. Before returning an instrument to the
customer, always make a safety check of the

entire instrument, including, but not limited to, the
following items:

a. Be sure that no built-in protective devices are

defective and have been defeated during
servicing. (1) Protective shields are provided
on this chassis to protect both the technician
and the customer. Correctly replace all missing
protective shields, including any removed for
servicing convenience. (2) When reinstalling
the chassis and/or other assembly in the
cabinet, be sure to put back in place all
protective devices, including but not limited to,
nonmetallic control knobs, insulating
fishpapers, adjustment and compartment
covers/shields, and isolation resistor/capacitor
networks. Do not operate this instrument or

permit it to be operated without all
protective devices correctly installed and
functioning. Servicers who defeat safety
features or fail to perform safety checks
may be liable for any resulting damage.

b. Be sure that there are no cabinet openings

through which an adult or child might be able to
insert their fingers and contact a hazardous
voltage. Such openings include, but are not
limited to, (1) spacing between the LCD module
and the cabinet mask, (2) excessively wide
cabinet ventilation slots, and (3) an improperly
fitted and/or incorrectly secured cabinet back
cover.

c. Antenna Cold Check - With the instrument AC

plug removed from any AC source, connect an
electrical jumper across the two AC plug
prongs. Place the instrument AC switch in the
on position. Connect one lead of an ohmmeter
to the AC plug prongs tied together and touch
the other ohmmeter lead in turn to each tuner
antenna input exposed terminal screw and, if
applicable, to the coaxial connector. If the
measured resistance is less than 1.0 megohm
or greater than 5.2 megohm, an abnormality
exists that must be corrected before the
instrument is returned to the customer. Repeat
this test with the instrument AC switch in the off
position.

d. Leakage Current Hot Check - With the

instrument completely reassembled, plug the
AC line cord directly into a 230 V AC outlet. (Do
not use an isolation transformer during this
test.) Use a leakage current tester or a
metering system that complies with American

National Standards Institute (ANSI) C101.1
Leakage Current for Appliances and
Underwriters Laboratories (UL) 1410, (50.7).
With the instrument AC switch first in the on
position and then in the off position, measure
from a known earth ground (metal water pipe,
conduit, etc.) to all exposed metal parts of the
instrument (antennas, handle brackets, metal
cabinet, screw heads, metallic overlays, control
shafts, etc.), especially any exposed metal
parts that offer an electrical return path to the
chassis. Any current measured must not
exceed 0.5 milli-ampere. Reverse the
instrument power cord plug in the outlet and
repeat the test.

READING SHOULD
NOT BE ABOVE 0.5 mA

LEAKAGE

DEVICE

BEING

TESTED

TEST ALL EXPOSED
METAL SURFACES

ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED

ANY MEASUREMENTS NOT WITHIN THE
LIMITS SPECIFIED HEREIN INDICATE A
POTENTIAL SHOCK HAZARD THAT MUST
BE ELIMINATED BEFORE RETURNING THE
INSTRUMENT TO THE CUSTOMER OR
BEFORE CONNECTING THE ANTENNA OR
ACCESSORIES.

2. Read and comply with all caution and safety-

related notes on or inside the receiver cabinet, on
the receiver chassis, or on the LCD module.

3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this LCD
TV receiver. Design alterations and additions,
including, but not limited to circuit modifications
and the addition of items such as auxiliary audio
and/or video output connections, might alter the
safety characteristics of this receiver and create a
hazard to the user. Any design alterations or
additions will void the manufacturer's warranty and
may make you, the servicer, responsible for
personal injury or property damage resulting
therefrom.

CURRENT

TESTER

+

EARTH
GROUND

_

2-1 LTVP_ISP

4. Hot Chassis Warning -

a. Some TV receiver chassis are electrically

connected directly to one conductor of the AC
power cord and maybe safety-serviced without
an isolation transformer only if the AC power
plug is inserted so that the chassis is
connected to the ground side of the AC power
source. To confirm that the AC power plug is
inserted correctly, with an AC voltmeter,
measure between the chassis and a known
earth ground. If a voltage reading in excess of

1.0V is obtained, remove and reinsert the AC
power plug in the opposite polarity and again
measure the voltage potential between the
chassis and a known earth ground.

b. Some TV receiver chassis normally have 85V

AC(RMS) between chassis and earth ground
regardless of the AC plug polarity. This chassis
can be safety-serviced only with an isolation
transformer inserted in the power line between
the receiver and the AC power source, for both
personnel and test equipment protection.

c. Some TV receiver chassis have a secondary

ground system in addition to the main chassis
ground. This secondary ground system is not
isolated from the AC power line. The two
ground systems are electrically separated by
insulation material that must not be defeated or
altered.

5. Observe original lead dress. Take extra care to
assure correct lead dress in the following areas: a.
near sharp edges, b. near thermally hot parts-be
sure that leads and components do not touch
thermally hot parts, c. the AC supply, d. high
voltage, and, e. antenna wiring. Always inspect in
all areas for pinched, out of place, or frayed wiring.
Check AC power cord for damage.

6. Components, parts, and/or wiring that appear to
have overheated or are otherwise damaged
should be replaced with components, parts, or
wiring that meet original specifications.
Additionally, determine the cause of overheating
and/or damage and, if necessary, take corrective
action to remove any potential safety hazard.

7. Product Safety Notice - Some electrical and
mechanical parts have special safety-related
characteristics which are often not evident from
visual inspection, nor can the protection they give
necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc..
Parts that have special safety characteristics are
identified by a ! on schematics and in parts lists.
Use of a substitute replacement that does not
have the same safety characteristics as the
recommended replacement part might create
shock, fire, and/or other hazards. The product's
safety is under review continuously and new
instructions are issued whenever appropriate.
Prior to shipment from the factory, our products
are strictly inspected to confirm they comply with
the recognized product safety and electrical codes
of the countries in which they are to be sold.
However, in order to maintain such compliance, it
is equally important to implement the following
precautions when a set is being serviced.

2-2 LTVP_ISP

Precautions during Servicing

A. Parts identified by the ! symbol are critical for

safety.
Replace only with part number specified.

B. In addition to safety, other parts and assemblies

are specified for conformance with regulations
applying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise
blocking capacitors, and noise blocking filters, etc.

C. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1) Insulation Tape

2) PVC tubing

3) Spacers

4) Insulators for transistors.

E. When replacing AC primary side components

(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before
soldering.

F. Observe that the wires do not contact heat

producing parts (heat sinks, oxide metal film
resistors, fusible resistors, etc.)

G. Check that replaced wires do not contact sharp

edged or pointed parts.

H. When a power cord has been replaced, check that

5~6 kg of force in any direction will not loosen it.

I. Also check areas surrounding repaired locations.

J. Use care that foreign objects (screws, solder

droplets, etc.) do not remain inside the set.

K. Crimp type wire connector

The power transformer uses crimp type
connectors which connect the power cord and the
primary side of the transformer. When replacing
the transformer, follow these steps carefully and
precisely to prevent shock hazards.
Replacement procedure

1) Remove the old connector by cutting the wires
at a point close to the connector.
Important: Do not re-use a connector (discard
it).

2) Strip about 15 mm of the insulation from the
ends of the wires. If the wires are stranded,
twist the strands to avoid frayed conductors.

3) Align the lengths of the wires to be connected.
Insert the wires fully into the connector.

4) Use the crimping tool to crimp the metal sleeve
at the center position. Be sure to crimp fully to
the complete closure of the tool.

L. When connecting or disconnecting the internal

connectors, first, disconnect the AC plug from the
AC supply outlet.

M. When installing parts or assembling the cabinet

parts, be sure to use the proper screws and
tighten certainly.

2-3 LTVP_ISP

Safety Check after Servicing

Examine the area surrounding the repaired location
for damage or deterioration. Observe that screws,
parts and wires have been returned to original posi­tions. Afterwards, perform the following tests and con­firm the specified values in order to verify compliance
with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between sol­dered terminals, and between terminals and surround­ing metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area

AC Line Voltage Clearance Distance (d), (d’)

230 V

Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.

≥ 3mm(d)

≥ 6 mm(d’)

2. Leakage Current Test

Confirm the specified (or lower) leakage current be­tween B (earth ground, power cord plug prongs) and
externally exposed accessible parts (RF terminals, an­tenna terminals, video and audio input and output ter­minals, microphone jacks, earphone jacks, etc.).

Chassis or Secondary Conductor

Primary Circuit

d' d

Exposed Accessible Part

Z

AC Voltmeter
(High Impedance)

Fig. 1

Measuring Method : (Power ON)

Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure across both terminals of load
Z. See Fig. 2 and following table.

Table 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in

parallel

230 V

50kΩ RES.

Connected in

parallel

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

One side of

B

Power Cord Plug Prongs

One side of power cord plug

prongs (B) to:

Antenna terminals

A/V Input, Output

Fig. 2

RF or

2-4 LTVP_ISP

STANDARD NOTES FOR SERVICING

Circuit Board Indications

1. The output pin of the 3 pin Regulator ICs is
indicated as shown.

Top View

Out

2. For other ICs, pin 1 and every fifth pin are
indicated as shown.

Pin 1

3. The 1st pin of every male connector is indicated as
shown.

Pin 1

Input

In

Bottom View

5

10

Pb (Lead) Free Solder

Pb free mark will be found on PCBs which use Pb
free solder. (Refer to figure.) For PCBs with Pb free
mark, be sure to use Pb free solder. For PCBs
without Pb free mark, use standard solder.

Pb free mark

How to Remove / Install Flat Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:

1. Prepare the hot-air flat pack-IC desoldering
machine, then apply hot air to the Flat Pack-IC
(about 5 to 6 seconds). (Fig. S-1-1)

Fig. S-1-1

2. Remove the flat pack-IC with tweezers while
applying the hot air.

3. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)

4. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)

CAUTION:

1. The Flat Pack-IC shape may differ by models. Use
an appropriate hot-air flat pack-IC desoldering
machine, whose shape matches that of the Flat
Pack-IC.

2. Do not supply hot air to the chip parts around the
flat pack-IC for over 6 seconds because damage
to the chip parts may occur. Put masking tape
around the flat pack-IC to protect other parts from
damage. (Fig. S-1-2)

3. The flat pack-IC on the CBA is affixed with glue, so
be careful not to break or damage the foil of each
pin or the solder lands under the IC when
removing it.

Hot-air
Flat Pack-IC
Desoldering

CBA

Masking
Tape

Tweezers

3-1 TVP_SN

Machine

Flat Pack-IC

Fig. S-1-2

With Soldering Iron:

1. Using desoldering braid, remove the solder from
all pins of the flat pack-IC. When you use solder
flux which is applied to all pins of the flat pack-IC,
you can remove it easily. (Fig. S-1-3)

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

2. Lift each lead of the flat pack-IC upward one by
one, using a sharp pin or wire to which solder will
not adhere (iron wire). When heating the pins, use
a fine tip soldering iron or a hot air desoldering
machine. (Fig. S-1-4)

With Iron Wire:

1. Using desoldering braid, remove the solder from
all pins of the flat pack-IC. When you use solder
flux which is applied to all pins of the flat pack-IC,
you can remove it easily. (Fig. S-1-3)

2. Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5.

3. While heating the pins using a fine tip soldering
iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA
contact pads as shown in Fig. S-1-5.

4. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)

5. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)

Note: When using a soldering iron, care must be

taken to ensure that the flat pack-IC is not
being held by glue. When the flat pack-IC is
removed from the CBA, handle it gently
because it may be damaged if force is applied.

Sharp
Pin

Fine Tip
Soldering Iron

3. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)

4. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)

Fig. S-1-4

To Solid
Mounting Point

CBA

Hot Air Blower

or

Iron Wire

Soldering Iron

Fig. S-1-5

Fine Tip
Soldering Iron

Flat Pack-IC

Tweezers

Fig. S-1-6

3-2 TVP_SN

2. Installation

1. Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more
easily.

2. The “●” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the 1
on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See
Fig. S-1-8.)

3. Solder all pins of the flat pack-IC. Be sure that
none of the pins have solder bridges.

Example :

Pin 1 of the Flat Pack-IC
is indicated by a " " mark.

Fig. S-1-7

Instructions for Handling Semi­conductors

Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by
electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1 MΩ) that is
properly grounded to remove any static electricity that
may be charged on the body.

2. Ground for Workbench

Be sure to place a conductive sheet or copper plate
with proper grounding (1 MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will not escape through the body grounding
band, be careful to avoid contacting semi-conductors
with your clothing.

<Incorrect>

CBA

Presolder

Flat Pack-IC

Fig. S-1-8

<Correct>

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or
Copper Plate

3-3 TVP_SN

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps for the
cabinet parts, and the CBA in order to gain access to
item(s) to be serviced. When reassembling, follow the
steps in reverse order. Bend, route and dress the
cables as they were.

[1] Stand Base
Plate

[2] Stand Hinge

[16] Speaker (R)

[17] Speaker (L)

[7] Jack Holder(D)

[9] Shield Box

[11] Digital Main
CBA Unit

[3] Stand Cover

[4] Rear Cabinet

[6] Chassis Bracket

[8] Jack Holder(A)

[10] Main CBA

[12] PCB Holder

[13] Panel Holder

[14] LCD Module

[18] Front Cabinet

[5] Function CBA

[15] LED CBA

2. Disassembly Method

Removal

Step/

Loc.

No.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

Part

Stand Base
Plate

Stand
Hinge

Stand
Cover

Rear
Cabinet

Function
CBA

Chassis
Bracket

Jack
Holder(D)

Remove/*Unhook/

Fig.

No.

Unlock/Release/

Unplug/Unclamp/

Note

Desolder

D1 4(S-1), 6(S-2), 5(S-3) ---

D1 --------------- ---

D1 --------------- ---

D1 12(S-4), 4(S-5) ---

D1D53(S-6), *CN10, *CN11,

*CN11B

D2 12(S-7) ---

D2 (S-8) ---

---

Removal

Step/

Loc.

No.

Part

Remove/*Unhook/

Fig.

No.

Unlock/Release/

Unplug/Unclamp/

Note

Desolder

Jack

[8]

Holder(A)

D2 5(S-9) ---

[9] Shield Box D2 4(S-10) ---

6(S-11), *CN54,

[10] Main CBA

*CN101A, *CN102A,

D5

*CN103A, *CN104A,

---

D3

*CN701, *CN702

Digital Main

[11]

CBA UnitD3D5

4(S-12), *CN111,
*CN400

---

[12] PCB Holder D3 --------------- ---

Panel

[13]

[14]

Holder

LCD
Module

D4 6(S-13), 4(S-14) ---

D4 --------------- ---

[15] LED CBA D4 (S-15) ---

Speaker

[16]

(R)

D4 4(S-16) ---

[17] Speaker (L) D4 4(S-17) ---

Front

[18]

↓

(1)

Cabinet

↓

(2)

D4 --------------- ---

↓

(3)

↓

(4)

↓

(5)

Note:

(1) Order of steps in procedure. When reassembling,

follow the steps in reverse order. These numbers
are also used as the Identification (location) No. of
parts in figures.

(2) Parts to be removed or installed.

(3) Fig. No. showing procedure of part location

(4) Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or
desoldered.
N = Nut, L = Locking Tab, S = Screw,
CN = Connector
* = Unhook, Unlock, Release, Unplug, or Desolder
e.g. 2(S-2) = two Screws (S-2),
2(L-2) = two Locking Tabs (L-2)

(5) Refer to the following "Reference Notes in the

Ta b le . "

4-1 L5820DC

TV Cable Wiring Diagram

Function CBA

CN10

To LCD
Module

To Speaker

CN11

CN11B

To LCD
Module

CN11A

CN111

LED CBA

CN54B

CN400

Digital Main
CBA Unit

CN101B

CN102B

CN103B

CN104B

CN101A

CN102A

CN103A

CN104A

CN54

Main CBA

CN701

CN702

Fig. D5

4-5 L5820DC

HOW TO INITIALIZE THE LCD TELEVISION

To put the program back at the factory-default,
initialize the LCD television as the following procedure.

How to initialize the LCD television:

1. Turn the power off.

2. To enter the service mode, while pressing
[SETUP] button, press [STANDBY-ON] button on
the TV unit.

- To cancel the service mode, press [STANDBY-

ON] button on the remote control.

3. To initialize the LCD television, press “DISPLAY”
button on the remote control unit.

4. Confirm "FF" indication on the upper left of the
screen.

5-1 L5820INT

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note:
“CBA” is abbreviation for “Circuit Board Assem-

bly.”

NOTE:

Electrical adjustments are required after replacing
circuit components and certain mechanical parts. It is
important to perform these adjustments only after all
repairs and replacements have been completed.
Also, do not attempt these adjustments unless the
proper equipment is available.

Test Equipment Required

1. DC Voltmeter

2. Pattern Generator

3. Color Analyzer

How to Set up the Service mode:

1. Turn the power off.

2. While pressing [SETUP] button, press [STANDBY­ON] button on the TV unit

- To cancel the service mode, press [STANDBY-ON]
button on the TV unit.

1. Initial Setting

General

Enter the Service mode.

Set the each initial data as shown on table 1 below.

Table 1: Initial Data

BUTTON

ITEM

D1-BRT
D1-CNT 128
D1-CLR-R 128
D1-CLR-B 128
D1-TNT 128
D1-SHR 70
D2-BRT
D2-CNT 128
D2-CLR-R 128
D2-CLR-B 128
D2-TNT 128
D2-SHR 70
D3-BRT
D3-CNT 120
D3-CLR-R 128
D3-CLR-B 128
D3-TNT 128
D3-SHR 27
D4-BRT
D4-CNT 123
D4-CLR-R 128
D4-CLR-B 128
D4-TNT 128
D4-SHR 27
BRT
CNT 160
CLR-R 128
CLR-B 128
TNT 128
SHR 45
S-BRT
S-CNT 160
S-CLR-R 128
S-CLR-B 128
S-TNT 128
S-SHR 45
C-BRT
C-CNT 128
C-CLR-R 128
C-CLR-B 128
C-TNT 128
C-SHR 70

(on the remote

control)

MENU → 1

MENU → 2

MENU → 3

MENU → 4

MENU → 5

MENU → 6

MENU → 7

DATA

VALUE

128

128

128

128

128

128

128

6-1 L5820EA

DT-BRT

ITEM

BUTTON

(on the remote

control)

DATA

VALUE

128
DT-CNT 160
DT-CLR-R 128
DT-CLR-B 128

MENU → 8

DT-TNT 128
DT-SHR 45
BRIGHT 0 255
NORMAL 0 176
DARK 0 112
7F
LAST POWER ON
NCM ON

VOL. p

FF

XV100 OFF
*COR 1(C/D/S 1) VOL. p → 1 125
COG 1(C/D/S 1) VOL. p → 2 128
*COB 1(C/D/S 1) VOL. p → 3 128
*DR 1(C/D/S 1) VOL. p → 4 131
DG 1(C/D/S 1) VOL. p → 5 128
*DB 1(C/D/S 1) VOL. p → 6 142
SBR 1(C/D/S 1) VOL. p → 763
SBB 1(C/D/S 1) VOL. p → 963
*COR 2(C/D/S 2) VOL. p → 1 108
COG 2(C/D/S 2) VOL. p → 2 110
*COB 2(C/D/S 2) VOL. p → 395
*DR 2(C/D/S 2) VOL. p → 4 118
DG 2(C/D/S 2) VOL. p → 5 115
*DB 2(C/D/S 2) VOL. p → 6 134
SBR 2(C/D/S 2) VOL. p → 763
SBB 2(C/D/S 2) VOL. p → 963
*COR 3(C/D/S 3) VOL. p → 1 125
COG 3(C/D/S 3) VOL. p → 2 128
*COB 3(C/D/S 3) VOL. p → 3 128
*DR 3(C/D/S 3) VOL. p → 4 131
DG 3(C/D/S 3) VOL. p → 5 128
*DB 3(C/D/S 3) VOL. p → 6 142
SBR 3(C/D/S 3) VOL. p → 763
SBB 3(C/D/S 3) VOL. p → 963

2. Purity Check Mode

This mode cycles through full-screen displays of red,
green, blue, and white to check for non-active pixels.

1. Enter the Service mode.

2. Each time pressing [7] button on the service
remote control unit, the display changes as
follows.

Purity Check Mode

Red mode

[7] button

[7] button

Green mode

[7] button

Blue mode

[7] button

White mode

Note:

When entering this mode, the default setting is White mode.

NOTE: * These data value will be changed by the White

Balance Adjustment.

6-2 L5820EA

3. Auto Calibration

Purpose: To bring the color adjustment of each

component into standard alignment.

The following adjustment normally are not
attempted in the field. Only when replacing the
LCD Panel then adjust as a preparation.

Symptom of Misadjustment: If this adjustment is

incorrect, component signals do not reproduce the
corresponding color.

Gain Adjustment

1. Input white raster signal (5%=5 IRE, 100%=100
IRE) from Component jack.

INPUT SIGNAL

5%=5IRE

2. Enter the service mode.

3. To enter the Auto Calibration adjustment mode,
press [5] button on the service remote control unit.

4. To start auto adjustment, press [CH o] button on
the service remote control unit.

- In the auto adjustment mode, “Please Wait”

appears on the screen.

- Upon completion, “OK” and appears on the

screen.

- If the auto adjustment failure, “ NG” appears on

the screen.

100%=100IRE

4. White Balance Adjustment

Purpose: To mix red, green and blue beams correctly

for pure white.
Symptom of Misadjustment: White becomes bluish

or reddish.

Test Point Adj. Point Mode Input

[CVBS]

C/D/S 1

Screen

Pattern Generator,

Color analyzer

VOL. p

buttons

M. EQ. Spec.

[YUV]

C/D/S 2

[RGB]

C/D/S 3

(APL 70%)

(APL 25%)

Figure

It carries out in a darkroom.

Perpendicularity

x: 0.242 to 0.302,

y: 0.248 to 0.308

x: 0.262 to 0.282,

y: 0.268 to 0.288

White Purity

(APL 70%)

or

(APL 25%)

Offset Adjustment

5. Input white raster signal (5%=5 IRE) from
Component jack.

INPUT SIGNAL

5%=5IRE

6. Enter the service mode.

7. To enter the Auto Calibration adjustment mode,
press [6] button on the service remote control unit.

8. To start auto adjustment, press [CH o] button on
the service remote control unit.

- In the auto adjustment mode, “Please Wait”

appears on the screen.

- Upon completion, “OK” and appears on the

screen.

- If the auto adjustment failure, “ NG” appears on

the screen.

L = 50 cm

INPUT: WHITE 70%,25%

1. Operate the unit for more than 20 minutes.

2. Input the White Purity.

INPUT SIGNAL

3. Set the color analyzer to the CHROMA mode and
bring the optical receptor to the center on the
LCD-Panel surface after zero point calibration as
shown above.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.

4. [CVBS]
Enter the Service mode. Press “VOL p” button on
the remote control unit and select “C/D/S 1” mode.

[YUV]

Enter the Service mode. Press “VOL p” button on
the remote control unit and select “C/D/S 2” mode.

Color Analyzer

25%=25IRE70%=70IRE

6-3 L5820EA