Magnavox 19MD359B/F7 Schematic

0 (0)

LCD TV/DVD

chassis FL9.3

SERVICE MANUAL

Contents

19” LD195SSX SYLVANIA Limited

19” LD195EMX EMERSON

19” 19MD359B/F7 MAGNAVOX

downloaded or stored in any storage medium, in any form or for any purpose without the express prior written

consent of Funai. Furthermore, any unauthorized commercial distribution of this manual or any revision hereto

is strictly prohibited.

Information in this document is subject to change without notice. Funai reserves the right to change the content

herein without the obligation to notify any person or organization of such changes.

with the design is a registered trademark of Funai Electric Co., Ltd and may not be used in any way

without the express written consent of Funai. All other trademarks used herein remain the exclusive property of

their respective owners. Nothing contained in this manual should be construed as granting, by implication or

otherwise, any license or right to use any of the trademarks displayed herein. Misuse of any trademarks or any

other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights

to the fullest extent of the law.

A94N1UH/A94N4UH/A94N0UH

090410

IMPORTANT SAFETY NOTICE

Proper service and repair is important to the safe, reliable operation of all

Funai Equipment. The service procedures recommended by Funai and

described in this service manual are effective methods of performing

service operations. Some of these service special tools should be used

when and as recommended.

It is important to note that this service manual contains various CAUTIONS

and NOTICES which should be carefully read in order to minimize the risk

of personal injury to service personnel. The possibility exists that improper

service methods may damage the equipment. It also is important to

understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE.

Funai could not possibly know, evaluate and advice the service trade of all

conceivable ways in which service might be done or of the possible

hazardous consequences of each way. Consequently, Funai has not

undertaken any such broad evaluation. Accordingly, a servicer who uses a

service procedure or tool which is not recommended by Funai must first

use all precautions thoroughly so that neither his safety nor the safe

operation of the equipment will be jeopardized by the service method

selected.

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 col

This is not to be considered a defect in the LCD screen.

Manufactured under license from Dolby Laboratories.

Dolby and the double-D symbol are trademarks of Dolby Laboratories.

TABLE OF CONTENTS

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

Laser Beam Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

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

How to Initialize the LCD TV/DVD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Firmware Renewal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

Schematic Diagrams / CBA and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1

Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-1

Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-1

1-1 A94N1SP

SPECIFICATIONS

< LCD TV Section >

< TUNER / NTSC >

ANT. Input ---------------------- 75 Ω Unbal., F type

< TUNER / ATSC >

< LCD PANEL >

< VIDEO >

< AUDIO >

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

Description Condition Unit Nominal Limit

1. AFT Pull-In Range --- MHz ±2.3 ±2.1

2. Synchronizing Sens.

TV.ch.4

CA.ch.31

CA.ch.87

dBµ

Description Condition Unit Nominal Limit

1. Received Freq. Range (-28dBm) --- kHz --- ±100

2. ATSC Dynamic Range (min / max)

ch.4

ch.10

ch.41

dBm

---

-76/0

-76/+4

Description Condition Unit Nominal Limit

1. Native Pixel Resolution

Horizontal

Verti cal

pixels

1366

768

---

2. Brightness (w / filter) --- cd/m

280 ---

3. Viewing Angle

Horizontal

Verti cal

-85 to 85

-80 to 80

---

Description Condition Unit Nominal Limit

1. Over Scan

Horizontal

Verti cal

5±5

2. Color Temperature

---

°K 12000

0.272

0.278

---

±3%

3. Resolution (composite video)

Horizontal

Verti cal

line

400

350

---

Description Condition Unit Nominal Limit

1. Audio Output 10% Distortion

(ATSC 0 dBfs)

Lch/Rch W 1.5/1.5 1.3/1.3

2. Audio Distortion (NTSC) 500mW: Lch/Rch % 0.5/0.5 2.0/2.0

3. Audio Freq. Response (NTSC)

6dB: Lch

6dB: Rch

70 to 10 k

---

1-2 A94N1SP

< DVD >

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.

Description Condition Unit Nominal Limit

1. Horizontal Resolution (TDV-540 TIT.2 CHP.16) --- Line 350 330

2. Audio Distortion (LPCM 48 kHz, W/LPF)

(PTD 1-NOR TIT.1 CHP.1)

% 0.03 0.07

3. Audio freq. response (LPCM 48 kHz)

(PTD 1-NOR TIT.1 CHP.5 -- 10)

L, 20 Hz

R, 20 Hz

L, 20 kHz

R, 20 kHz

dB 0 +4/-5

4. Audio S/N (LPCM 48 kHz, W/LPF, A-WTD)

(PTD 1-NOR TIT.1 CHP.1 -- 2)

dB 85 75

2-1 TVDVDN_LBSP

LASER BEAM SAFETY PRECAUTIONS

This DVD player uses a pickup that emits a laser beam.

The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep

your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser

beam.

CAUTION: Use of controls and adjustments, or doing procedures other than those specified herein, may result in

hazardous radiation exposure.

Location: Top of LCD module.

Do not look directly at the laser beam coming

from the pickup or allow it to strike against your

skin.

Drive Mechanism

Assembly

Laser Beam Radiation

Laser Pickup

Turntable

3-1 LTVN_ISP

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 Liquid

Crystal Panel 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 120 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.

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 Liquid Crystal

Panel.

ALSO TEST WITH

PLUG REVERSED

USING AC

ADAPTER PLUG

AS REQUIRED

TEST ALL EXPOSED

METAL SURFACES

READING SHOULD

NOT BE ABOVE 0.5 mA

EARTH

GROUND

DEVICE

LEAKAGE

CURRENT

TESTER

BEING

TESTED

3-2 LTVN_ISP

3. Design Alteration Warning - Do not alter or add

to the mechanical or electrical design of this 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.

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.

3-3 LTVN_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. When connecting or disconnecting the internal

connectors, first, disconnect the AC plug from the

AC supply outlet.

L. When installing parts or assembling the cabinet

parts, be sure to use the proper screws and

tighten certainly.

3-4 LTVN_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

Note: This table is unofficial and for reference only. Be

sure to confirm the precise values.

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.) is

lower than or equal to the specified value in the table

below.

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

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

AC Line Voltage Region

Clearance

Distance (d), (d’)

110 to 130 V

U.S.A. or

Canada

≥ 3.2 mm

(0.126 inches)

AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:

110 to 130 V

U.S.A. or

Canada

0.15 µF CAP. & 1.5 kΩ

RES. Connected in parallel

i ≤ 0.5 mA rms

Exposed accessible

parts

Chassis or Secondary Conductor

Primary Circuit

Fig. 1

d' d

AC Voltmeter

(High Impedance)

Exposed Accessible Part

Earth Ground

Power Cord Plug Prongs

Fig. 2

4-1 TVDVDN_SN

STANDARD NOTES FOR SERVICING

Circuit Board Indications

1. The output pin of the 3 pin Regulator ICs is

indicated as shown.

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

indicated as shown.

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

shown.

Instructions for Connectors

1. When you connect or disconnect the FFC (Flexible

Foil Connector) cable, be sure to first disconnect

the AC cord.

2. FFC (Flexible Foil Connector) cable should be

inserted parallel into the connector, not at an

angle.

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.

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)

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

Top View

Out

Bottom View

Input

Pin 1

FFC Cable

Connector

CBA

* Be careful to avoid a short circuit.

Pb free mark

Fig. S-1-1

4-2 TVDVDN_SN

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.

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)

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)

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)

Hot-air

Flat Pack-IC

Desoldering

Machine

CBA

Flat Pack-IC

Tweezers

Masking

Tape

Fig. S-1-2

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

Fine Tip

Soldering Iron

Sharp

Fig. S-1-4

4-3 TVDVDN_SN

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.

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.

To Solid

Mounting Point

Soldering Iron

Iron Wire

Hot Air Blower

Fig. S-1-5

Fine Tip

Soldering Iron

CBA

Flat Pack-IC

Tweezers

Fig. S-1-6

Example :

Pin 1 of the Flat Pack-IC

is indicated by a " " mark.

Fig. S-1-7

Presolder

CBA

Flat Pack-IC

Fig. S-1-8

4-4 TVDVDN_SN

Instructions for Handling Semi-

conductors

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.

CBA

Grounding Band

Conductive Sheet or

Copper Plate

1MΩ

CBA

5-1 A94N1DC

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.

2. Disassembly Method

Step/

Loc.

No.

Part

Removal

Fig.

No.

Remove/*Unhook/

Unlock/Release/

Unplug/Unclamp/

Desolder

Note

[1]

Stand

Assembly

D1 3(S-1) ---

[2]

Rear

Cabinet

D1 10(S-2), 2(S-3), (S-4) ---

[3] DVD Holder

4(S-5), 3(S-6),

*CN901, *CN902

---

[4]

DVD

Mechanism

(S-7), *CN201,

*CN301, *CN801

[5]

DVD Main

CBA Unit

D2 --------------- ---

[1] Stand

Assembly

[4] DVD

Mechanism

[5] DVD Main

CBA Unit

[2] Rear Cabinet

[16] Junction-B

CBA

[6] Jack Holder

(D)

[15] Junction-C

CBA

[10] Main CBA

[13] Speaker

Holder (s)

[9] Jack CBA

[14] Speaker (s)

[3] DVD Holder

[11] Stand Holder

[7] Digital Main

CBA Unit

[18] Function

CBA

[12] LCD Module

Assembly

[19] Front

Cabinet

[8] Jack Holder

(A)

[17] Junction-A

CBA

[6]

Jack

Holder(D)

D3 (S-8) ---

[7]

Digital Main

CBA Unit

4(S-9), (S-10),

4(S-11), 2(H-1),

*CN301, *CN302,

*CN303, *CN3902,

Shield Box

---

[8]

Jack

Holder(A)

D3 (S-12) ---

[9] Jack CBA

4(S-13), CN702,

*CN861A

---

[10] Main CBA

7(S-14), *CN102,

*CN201, *CN862A,

*CN1001, *CN1002

---

[11]

Stand

Holder

D4 2(S-15), (S-16) ---

[12]

LCD

Module

Assembly

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

[13]

Speaker

Holder(s)

D4 4(S-17) ---

[14] Speaker(s) D4 --------------- ---

[15]

Junction-C

CBA

Desolder ---

[16]

Junction-B

CBA

Desolder ---

[17]

Junction-A

CBA

Desolder ---

[18]

Function

CBA

2(S-18) ---

[19]

Front

Cabinet

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

↓

(1)

↓

(2)

↓

(3)

↓

(4)

↓

(5)

Step/

Loc.

No.

Part

Removal

Fig.

No.

Remove/*Unhook/

Unlock/Release/

Unplug/Unclamp/

Desolder

Note

5-2 A94N1DC

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.

P = Spring, L = Locking Tab, S = Screw,

H = Hex 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 bl e ."

Reference Notes

1. CAUTION 1: Electrostatic breakdown of the laser

diode in the optical system block may occur as a

potential difference caused by electrostatic charge

accumulated on cloth, human body etc., during

unpacking or repair work.

To avoid damage of pickup follow next procedures.

1) Short the three short lands of FPC cable with

solder before removing the FFC cable (CN201)

from it. If you disconnect the FFC cable

(CN201), the laser diode of pickup will be

destroyed. (Fig. D2)

2) Disconnect the Connectors (CN301), and

(CN801). Remove Screw (S-7) and remove the

DVD Main CBA Unit. (Fig. D2)

2. Reassembly Notes of New DVD Mechanism:

a. To remove the Chassis Cover, remove two

screws A as shown in Fig. D2.

b. To avoid damage of the pickup unit (laser

diode), confirm that the three short lands (either

of two places) are shorted out by soldering

between them as shown in View A in Fig. D2.

c. Connect the FFC cables of the new DVD

Mechanism to the three connectors (CN201,

CN301, CN801) on the DVD Main CBA Unit.

d. After confirming that the FFC cables are

securely connected to the three connectors,

remove the solder from the three short lands. If

the solder is not removed, the laser diode will

not light and it will not be possible to read discs.

e. Insert the pin A on the Chassis Cover into the

hole A on the Main Chassis as shown in Fig.

D2. Then tighten two screws A to install the

Chassis Cover.

3. CAUTION 2: When reassembling, confirm the

FFC cable (CN201) is connected completely. Then

remove the solder from the three short lands of

FPC cable. (Fig. D2)

4. How to eject a disc in emergency

Press and hold [EJECT] on the unit for more than

5 seconds.

5. How to eject manually 1

1) Remove the Rear Cabinet.

2) Rotate the gear in the direction of the arrow as

shown below.

6. How to eject manually 2

1) Remove the Rear Cabinet.

2) To remove the DVD Main CBA Unit, remove a

screw (S-7) in Fig. D2. Do not disconnect

connectors.

3) To remove the Chassis Cover, remove two

screws A as shown in Fig. D2.

4) Remove a disc.

View for B

The gear is turned to the direction

of the arrow.

5-3 A94N1DC

[2] Rear Cabinet

(S-1)

[1] Stand Assembly

(S-2)

(S-4)

(S-2)

(S-3)

Fig. D1

5-4 A94N1DC

Remove two screws A, then short the three short lands by soldering as shown in View for A.

View for A

Either of two places

FPC Cable

Chassis Cover

Pin A

Hole A

Main Chassis

Screws A

(S-5)

(S-7)

(S-6)

[5] DVD Main CBA Unit

[4] DVD Mechanism

[3] DVD Holder

Fig. D2

5-5 A94N1DC

(S-8)

(S-9)

[9] Jack CBA

[6] Jack Holder(D)

[8] Jack Holder(A)

[10] Main CBA

[7] Digital Main

CBA Unit

(S-14)

(S-11)

(S-14)

(S-12)

Shield Box

(S-13)

(H-1)

(S-10)

Fig. D3

5-6 A94N1DC

(S-16)

(S-18)

(S-17)

[12] LCD Module

Assembly

[11] Stand Holder

[18] Function CBA

[13] Speaker

Holder

[13] Speaker

Holder

[15] Junction-C

CBA

[16] Junction

-B CBA

[17] Junction-A

CBA

[14] Speaker

[19] Front Cabinet

(S-15)

[14] Speaker

Fig. D4

5-7 A94N1DC

TV Cable Wiring Diagram

Main CBA

Jack CBA

CN201

CN1001

CN1002

CN3902

CN4001

CN3702

CN3701

Digital Main

CBA Unit

CN102

CN101

CN101A

CN702

AC CORD

CN302

CN303

CN701

CN861A

CN861B

CL861

CN902

CN901

CN862A

CN301

CN101B

Junction-C CBA

Junction-A CBA

Junction-B

CBA

Function CBA

DVD Main

CBA Unit

CN601

CN301

CN201

CN801

CN401

To DVD Mechanism

To LCD Module

Assembly

To Speaker

CN862B

CL862

To LCD Module

Assembly

Fig. D5

6-1 FL9.3EA

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note: “CBA” is abbreviation for

“Circuit Board Assembly.”

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. NTSC Pattern Generator (Color Bar W/White

Window, Red Color, Dot Pattern, Gray Scale,

Monoscope, Multi-Burst)

2. Remote control unit

3. Color Analyzer

How to make the Service remote

control unit:

[LD195SSX]

Cut “A” portion of the attached remote control unit as

shown in Fig. 1.

[LD195EMX]

Cut “A” portion of the attached remote control unit as

shown in Fig. 2.

[19MD359B/F7]

Cut “A” portion of the attached remote control unit as

shown in Fig. 3.

How to set up the service mode:

Service mode:

1. Use the service remote control unit.

2. Turn the power on.

3. Press the service button on the service remote

control unit. The following screen appears.

Fig. 1

service button

Fig. 2

service button

Fig. 3

service button

(There is a button under the plastic housing.)

Code :

Pic code :

MIPS :

***********-***

**-***-**-*****-***

Push 0key

Tuner :

Safety :

****-*****-****

safety_Non

" differs depending on the models.

6-2 LC7NEA

1. 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.

2. VCOM Adjustment

1. Operate the unit for more than 20 minutes.

2. Set the color analyzer 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.

3. Enter the Service mode.

4. Press [3] button on the service remote control unit.

5. Press [CHANNEL UP/DOWN] buttons on the

service remote control unit so that the color

analyzer value becomes minimum.

[7] button

Note:

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

Purity Check Mode

[7] button

Red mode

Green mode

Blue mode

Black mode

[7] button

White mode

[7] button

White 20% mode

[7] button

Test Point Adj. Point

Screen

[CHANNEL UP/DOWN ]

buttons

M. EQ. Spec.

Color analyzer See below

Figure

Color Analyzer

To avoid interference from ambinent

light, this adjustment should be

performed in a dark room.

L = 3 cm

Perpendicularity

6-3 LC7NEA

The white balance adjustment should be

performed when replacing the LCD Panel

or Digital CBA.

3. White Balance Adjustment

Purpose: To mix red, green and blue beams correctly

for pure white.

Symptom of Misadjustment: White becomes bluish

or reddish.

1. Operate the unit for more than 20 minutes.

2. Input the White Raster(70%=70IRE, 40%=40IRE).

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. Enter the Service mode. Press [VOLUME DOWN]

button on the service remote control unit and select

“C/D” mode.

5. [CUTOFF]

Press [1] button to select “COR” for Red Cutoff

adjustment. Press [3] button to select “COB” for

Blue Cutoff adjustment.

[DRIVE]

Press [4] button to select “DR” for Red Drive

adjustment. Press [6] button to select “DB” for Blue

Drive adjustment.

6. In each color mode, press [CHANNEL UP/DOWN]

buttons to adjust the values of color.

7. Adjust Cutoff and Drive so that the color

temperature becomes 12000°K (x

0.272 / y

0.278 ±0.005).

Test Point

Adj. Point Mode Input

Screen

[VOLUME

DOWN]

button

[VIDEO1]

C/D

White Raster

(APL 70%)

(APL 40%)

M. EQ. Spec.

Pattern Generator,

Color analyzer

x= 0.272 ± 0.005

y= 0.278 ± 0.005

Figure

Color Analyzer

L = 3 cm

Perpendicularity

INPUT: WHITE 70%, 40%

To avoid interference from ambinent

light, this adjustment should be

performed in a dark room.

40%=40IRE

70%=70IRE

100IRE

0IRE 0IRE

INPUT SIGNAL

Low

Light

Hight

Light

7-1 A94N1INT

HOW TO INITIALIZE THE LCD TV/DVD

The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to

select a language and program channels after the set has been initialized.

To put the program back at the factory-default, initialize the LCD TV/DVD using the following procedure.

< DVD Section >

1. Turn the power on.

2. To enter the service mode, press the service

button on the service remote control unit.

- To cancel the service mode, press [POWER]

button on the service remote control unit.

3. To put the LCD TV/DVD into the DVD mode, press

[CH RETURN] or [PREV CH] on the remote

control unit.

4. To put the LCD TV/DVD into the Flash clear mode,

press [INPUT SELECT] or [SOUCE] buttons on

the remote control unit in that order within five

seconds.

The following screen appears.

When “OK” appears on the screen, the factory

default will be set.

5. To exit this mode, press[CHANNEL UP/DOWN]

button to go to TV mode, or press [POWER] button

to turn the power off.

Note: The name of button may be diffent with the

model.

< LCD TV Section >

1. Turn the power on.

2. To enter the service mode, press the service

button on the service remote control unit.

- To cancel the service mode, press [POWER]

button on the service remote control unit.

3. Press [INFO] button on the service remote control

unit to initialize the LCD television.

4. "INITIALIZED" will appear in the upper left of the

screen. "INITIALIZED" color will change to green

from red when initializing is complete.

Flash Memory Clear : OK

CHUCKING ON

8-1 A94N1FW

FIRMWARE RENEWAL MODE

< DVD Section >

1. Turn the power on and press [EJECT] button on

the remote control unit to put the LCD TV/DVD into

DVD mode. Then remove the disc.

2. To put the LCD TV/DVD into F/W version up mode,

press [9], [8], [7], [6], and [MODE] buttons on the

remote control unit in that order.

Fig. a appears on the screen.

Fig. a Version Up Mode Screen

3. Insert the disc for version up into the disc slot.

4. The LCD TV/DVD enters the F/W version up mode

automatically. Fig. b appears on the screen. Make

sure to insert the proper F/W for the state of this

model.

Fig. b Programing Mode Screen

The appearance shown in (*1) of Fig. b is

described as follows:

5. After programming is finished, the disc will be

ejected automatically. Fig. c appears on the

screen and the checksum will be shown in (*2).

Fig. c Completed Program Mode Screen

At this time, no button is available.

6. Remove the disc.

7. Unplug the AC cord from the AC outlet. Then plug

it again.

8. Press [EJECT] button on the remote control unit to

put the LCD TV/DVD into DVD mode again.

9. Press [1], [2], [3], [4], and [INFO] buttons on the

remote control unit in that order.

Fig. d appears on the screen.

Fig. d

10. Press [CLEAR] button on the remote control unit.

Fig. e appears on the screen.

Fig. e

When “OK” appears on the screen, the factory

default will be set. Then the firmware renewal

mode is complete.

11. To exit this mode, press [CHANNEL UP/DOWN]

button to go to TV mode, or press [POWER] button

to turn the power off.

F/W Version Up Mode Model No : ******

VERSION : *.**

Please insert a DISC

for F/W Version Up.

EXIT: SELECT

*******

" differs depending on the models.

VERSION : ************.***

Reading...

F/W Version Up Mode Model No : ******

VERSION : *.**

*******

" differ depending on the models.

(*1)

AppearanceNo. State

Reading... Sending files into the memory

Erasing... Erasing previous version data

Programming...

3 Writing new version data

VERSION : ************.***

Completed

SUM : ****

F/W Version Up Mode

Model No : ******

VERSION : *.**

*******

" differ depending on the models.

(*2)

MODEL : ******

Version

: *.**

Region

: *

EXIT: SELECTEEPROM CLEAR : CLEAR

*******

" differs depending on the models.

MODEL : ******

Version

: *.**

Region

: *

EEPROM CLEAR : OK

EXIT: SELECTEEPROM CLEAR : CLEAR

*******

" differs depending on the models.

8-2 A94N1FW

< LCD TV Section >

Equipment Required

a. USB memory

b. Remote Control Unit

Firmware Update Procedure

Note: There are two states (the User Upgrade and

the Factory Upgrade) in firmware update.

The identification of User Upgrade and Factory

Upgrade are done by the filename.

1. Turn the power off and unplug the AC Cord.

2. Insert the USB memory to the USB port as shown

below.

3. Plug the AC cord in the wall outlet and turn the

power on.

4. The update will start and the following will appear

on the screen.

Note: If the above screen isn’t displayed, repeat from

step 1.

The appearance shown in *1 is described as follows.

5. When the firmware update is completed, the

following will appear on the screen.

Unplug the AC cord and kindly remove the USB

memory from the USB port. Plug the AC cord in

the wall outlet again and turn the power on.

Note:

When the Factory Upgrade is used, after restating

TV, shift to initial screen menu in service mode.

"INITIALIZED" will appear on the upper left of the

screen. "INITIALIZED" color will change to green

from red when initializing is complete.

User Upgrade Upgrade the firmware only.

The setting values are not

initialized.

Factory upgrade Upgrade the firmware and

initialize the setting values.

Rear Cabinet

USB Memory

USB port

Software upgrade in progress. Please wait.

Do not remove the USB device or turn the TV off

while upgrade is in progress.

Software Upgrade

Downloading...

Appearance State

Downloading...

Downloading the firmware from

the USB memory.

Writing...

Writing the downloaded firmware

in flash memory.

Checking... Checking the new firmware.

Software Upgrade

The software upgrade is completed.

Remove USB storage device, unplug and replug power code.

9-1 A94N1TR

TROUBLESHOOTING

[ Power Supply Section ]

The power cannot be turned on.

The fuse blows out.

FLOW CHART NO.1

FLOW CHART NO.2

Is normal state restored when once unplugged

power cord is plugged again several seconds?

Check if there is any leak or short-circuiting on the

primary circuit component, and service it if defective.

(D601, D602, D603, D604, Q601, Q602, T601)

Ye s

Is the fuse (F601) normal?

See FLOW CHART No.2 <The fuse blows out.>

Ye s

Is the INV+31V line voltage normal?

Check each rectifying circuit of the secondary

circuit and service it if defective.

Check the presence that the primary component

is leaking or shorted and service it if defective.

Check the presence that the rectifying diode or circuit

is shorted in each rectifying circuit of secondary side,

and service it if defective.

After servicing, replace the fuse.

When the output voltage fluctuates.

FLOW CHART NO.3

Does the photocoupler circuit on the

secondary side operate normally?

Ye s

Check IC601, D633, Q631 and their periphery

circuit, and service it if defective.

When buzz sound can be heard in the vicinity of power circuit.

FLOW CHART NO.4

Check if there is any short-circuit on the rectifying diode and the circuit

in each rectifying circuit of the secondary side,

and service it if defective. (IC631, IC901, Q201, Q2

05, Q206, Q634, Q635, Q636, Q637, Q640, Q641, Q643, Q901, Q903,

Q904, D631, D632, D636, D638, D639, D640, D641, D643)

Check D667, R655 and their periphery circuit, and

service it if defective.

INV+31V is not output.

FLOW CHART NO.5

Is approximately +31V voltage supplied to the

cathode of D632?

Ye s

Check C632, D632, D633 and their periphery

circuit, and service it if defective.

Check IC601, D608, D610 and their periphery,

circuit and service it if defective.

9-2 A94N1TR

Check Q202, Q203, D203, P-ON-H1 line and their

periphery circuit, and service it if defective.

PANEL+24.5V is not output.

FLOW CHART NO.6

Is approximately +30V voltage supplied to the collector

of Q205?

Ye s

See FLOW CHART No.5

Replace Q201.

Is approximately +13V voltage supplied to the

base of Q201?

Ye s

Check Q202, Q203, D201, D202, D210 and their

periphery circuit, and service it if defective.

PANEL+13V is not output.

FLOW CHART NO.7

Is approximately +15V voltage supplied to the

collector of Q201?

Ye s

Check C631, D631, D668 and their periphery circuit,

and service it if defective.

P-ON+7V is not output.

FLOW CHART NO.8

Is approximately +7V voltage supplied to the

cathode of D641?

Check C641, D641 and their periphery circuit,

and service it if defective.

Ye s

Check if there is any leak or short-circuit on

the loaded circuit, and service it if defective.

See FLOW CHART No.8

P-ON+5V is not output. (PANEL+13V is outputted normally.)

FLOW CHART NO.9

Is approximately +6.8V voltage supplied to the

collector of Q635?

Is approximately +6V voltage supplied to the

base of Q635 and the base of Q636?

Ye s

Check D659 and their periphery circuit, and service

it if defective.

Replace Q635 and Q636.

9-3 A94N1TR

See FLOW CHART No.8

TUNER+5V is not output. (PANEL+13V is outputted normally.)

FLOW CHART NO.10

Is approximately +6.7V voltage supplied to the

collector of Q637?

Is approximately +6V voltage supplied to the

base of Q637?

Ye s

Check D659 and their periphery circuit, and service

it if defective.

Replace Q637.

P-ON+3.3V(PANEL+3.3V) is not output.

FLOW CHART NO.12

Is approximately +5V voltage supplied to the

cathode of D639?

Is the "H" signal (approximately +3.5V) inputted to the

base of Q640?

Ye s

Check C639, D639 and their periphery circuit, and

service it if defective.

Check Q638, Q639, P-ON-H2 line and their periphery

circuit, and service it if defective.

EV+3.3V is not output.

FLOW CHART NO.13

Is approximately +4.6V voltage supplied to the

collector of Q903?

Ye s

Replace Q640.

Check Q903, D905 and their periphery

circuit, and service it if defective.

P-ON+3V is not output.

FLOW CHART NO.11

Is approximately +3V voltage supplied to the

cathode of D638?

Ye s

Check if there is any leak or short-circuit on

the loaded circuit, and service it if defective.

Check C638, D638 and their periphery circuit, and

service it if defective.

Check C638, D638 and their periphery circuit, and

service it if defective.

+ 71 hidden pages