LC5-D32BB_A73F0EP Funaj LCD.pdf

SERVICE MANUAL

″

COLOR LCD TELEVISION

LC5-D32BB

″

COLOR LCD TELEVISION

LC5-D32BB

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

Intermediate Freq. ------------Picture 45.75 MHz, Sound 41.25 MHz

Description

Condition

Unit

Nominal

Limit

1. Video S/N

80dB

>43

2. Audio S/N

---

>45

< LCD PANEL >

Description

Condition

Unit

Nominal

Limit

1. Number of Pixels

Horizontal

Ve r tic al

pixels

1366× 3

768

---

2. Viewing Angle

Horizontal

Ve r tic al

-85 to 85

---

< VIDEO >

Description

Condition

Unit

Nominal

Limit

1. Over Scan

Horizontal

Ver tical

---

AT 70% WHITE FIELD

°K

12000

0.272

0.278

---

±0.03

2. Color Temperature

3. Resolution

Horizontal

Ver tical

line

400

350

---

4. Brightness

AT 100% WHITE FIELD

BRT/CNT MAX

cd/m 2

450

---

< AUDIO >

All items are measured across 8

Ω

load at speaker output terminal.

Description

Condition

Unit

Nominal

Limit

1. Audio Output Power

10% THD: Lch/Rch

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

-6dB: Lch

-6dB: Rch

100 to 12 k

---

4. Audio S/N

VIDEO 1

---

>45/45

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.

1-1

A73F0SP

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

DEVICE

LEAKAGE

CURRENT

TESTER

BEING

TESTED

TEST ALL EXPOSED

METAL SURFACES

ALSO TEST WITH

PLUG REVERSED

USING AC

ADAPTER PLUG

AS REQUIRED

EARTH

GROUND

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.

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

1.0 V 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

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