Funai LF320FX4F Schematic

32” LCD TV

SERVICE MANUAL

Contents

TYPE A

32ME303V/F7 MAGNAVOX (Serial No.: ME1, ME2) LF320EM4 EMERSON (Serial No.: ME1, ME3) LF320EM4F EMERSON (Serial No.: ME1, ME2) LF320FX4F FUNAI (Serial No.: ME1)

TYPE B

LF320EM4 EMERSON (Serial No.: DS1) LF320EM4F EMERSON (Serial No.: DS1) LF320FX4F FUNAI (Serial No.: DS1, DS2)

This service manual contains information of different types of models. Make sure to refer to the section describing your model.

This service manual contains information of

chassis FL13.8

All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated, transcribed, 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.

130718

IMPORTANT SAFETY NOTICE

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.

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.

TABLE OF CONTENTS

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

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

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

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

Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

How to Initialize the LCD TV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Firmware Renewal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Schematic Diagrams / CBA and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

Wiring Diagrams[TYPE A]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

[TYPE B]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

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

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

SPECIFICATIONS

< TUNER / NTSC >

Description Condition Unit Nominal Limit

1. AFT Pull-In Range --- MHz ±2.3 ±2.1 TV.ch.4

2. Synchronizing Sens.

CA.ch.31 CA.ch.87

< TUNER / ATSC >

Description Condition Unit Nominal Limit

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

ch.4

2. ATSC Dynamic Range (min / max)

ch.10 ch.41

< LCD PANEL >

Description Condition Unit Nominal Limit

1. Native Pixel Resolution

2. Brightness (w / filter) ---

3. Viewing Angle

Horizontal

Verti cal

Horizontal

Verti cal

dBμ dBμ dBμ

dBm dBm dBm

pixels pixels

cd/m

° °

18 18 18

---

1366

768

250 ---

-88 to 88

20 20 23

-76/0

-76/+4

---

< VIDEO >

Description Condition Unit Nominal Limit

1. Over Scan

2. Color Temperature

3. Resolution (composite video)

Horizontal

Verti cal

--x y

<Measurement Condition> Input signal: HDMI1 Raster (40/80IRE) 1080i@60 Measurement point: Screen Center

Measuring instrument: Made of KONICA MINOLTA Luminance meter CA-310

Aging Time: 60min. (Retail MODE/100IRE Raster HDMI

MODE setting of TV: Shipment setting/Retail MODE Ambient temperature:25°C ± 5°C

Horizontal

Verti cal

% %

°K 12000

1080i@60)

line line

5 5

0.272

0.278

400 350

5±5 5±5

--±3% ±3%

---

< AUDIO >

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

Description Condition Unit Nominal Limit

Audio MAX Output (ATSC 0dBfs)

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

3. Audio Freq. Response (NTSC)

Lch/Rch W 8.0/8.0 7.0/7.0

6dB: Lch

6dB: Rch

Hz Hz

70 to 10 k 70 to 10 k

100 to 8 k 100 to 8 k

1-1 FL13.7SP

IMPORTANT SAFETY PRECAUTIONS

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

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

2. Read and comply with all caution and safety-

2-1 LTVN_ISP

INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES.

related notes on or inside the receiver cabinet, on the receiver chassis, or on the Liquid Crystal Panel.

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.

2-2 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

11~13 lb (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.

2-3 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

Chassis or Secondary Conductor

Primary Circuit

AC Line Voltage Region

110 to 130 V

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

sure to confirm the precise values.

U.S.A. or

Canada

Clearance

Distance (d), (d’)

≥ 3.2 mm

(0.126 inches)

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.

d' d

Fig. 1

Exposed Accessible Part

AC Voltmeter (High Impedance)

Earth Ground

Power Cord Plug Prongs

Fig. 2

Table 2: Leakage current ratings for selected areas

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

110 to 130 V

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

U.S.A. or

Canada

0.15 μF CAP. & 1.5 kΩ

RES. Connected in parallel

2-4 LTVN_ISP

i ≤ 0.5 mA rms

Exposed accessible

parts

STANDARD NOTES FOR SERVICING

Top View

Out

Bottom View

Input

Pin 1

Fig. S-1-1

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.

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)

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)

3-1 TVN_SN

3. The flat pack-IC on the CBA is affixed with glue, so

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 Pin

Fig. S-1-4

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)

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

3-2 TVN_SN

With Iron Wire:

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

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 “ I ” mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the pin 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.

Presolder

Flat Pack-IC

CBA

Fig. S-1-8

3-3 TVN_SN

Instructions for Handling Semi-

CBA

Grounding Band

Conductive Sheet or Copper Plate

1MΩ

CBA

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.

3-4 TVN_SN

CABINET DISASSEMBLY INSTRUCTIONS

[1] Rear Cover

[2] Stand

Assembly

[5] Power Supply CBA

[3] Speaker

[4] Stand Holder

[8] Front Cabinet

[6] Digital Main CBA Unit

[7] LCD Panel Assembly

[9] Function CBA Unit

1. Disassembly Flowchart

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

*1: all TYPE A models except for LF320FX4F(Serial No.: ME1)

*2: LF320FX4F(Serial No.: ME1) and all TYPE B models

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 e.g. 2(S-2) = two Screws of (S-2), 2(L-2) = two Locking Tabs of (L-2)

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

Ta bl e ."

2. Disassembly Method

Step/

Loc.

Part

No.

[1] Rear Cover D1 7(S-1), 5(S-2) ---

Stand

[2]

Assembly

[3] Speaker

Stand

[4]

Holder Power

[5]

Supply CBA

Digital Main

[6]

CBA UnitD3D5

LCD Panel

[7]

Assembly Front

[8]

Cabinet Function

[9]

CBA Unit

↓

(1)

↓

(2)

Fig.

No.

Removal Note

D1 3(S-3) ---

CN3801 ---

D2 4(S-4) 1

D3D54(S-5), CN501,

CN601, CN1001

4(S-6), CN3013 CN3006

, CN3101,

Jack Holder

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

D4 8(S-7) 2

Sensor Lens, Shield

Plate, Control Plate

↓

(3)

↓

(4)

---

↓

(5)

Important precautions concerning the LCD Panel Assembly:

1. When you disassemble/re-assemble the Stand

Holder for 32ME303V/F7 (Serial No.: ME2), LF320EM4 (Serial No.: ME3), and LF320EM4F (Serial No.: ME2) models.

• The CBA which is connected to the Digital Main

CBA Unit with CL3006 cannot be replaced alone. This CBA can only be supplied as LCD Panel Assembly. Be careful not to touch this CBA unnecessarily.

2. When you disassemble/re-assemble the Front

Cabinet or Function CBA Unit

• Be careful not to break the hooks. If you pull with too

much force, the hooks may be damaged.

• Be careful not to scratch the display panel when

assembling.

• Be careful not to scratch the rear frame when

disassembling/re-assembling or when tightening the screws.

• Make sure the Shield Plate is placed properly.

• The Function CBA Unit and Sensor Lens are fixed in

place by the hooks. Make sure these hooks are not damaged. Make sure the Function CBA Unit and Sensor Lens are securely in place when re-assembling.

4-1 FL13.8_DC

• The screw tightening torque must be 5.2lb·in

(S-3)

[2] Stand Assembly

(S-1)

(S-2)

[1] Rear Cover

(S-1)

Fig. D1

(6kgf·cm).

• Make sure the tact switches operate normally after replacing the Front Cabinet, Function CBA Unit, Sensor Lens, or Shield Plate.

• Make sure to replace the Control Plate to a new one when replacing the Front Cabinet.

4-2 FL13.8_DC

[4] Stand Holder

(S-4)

[3] Speaker

(S-4)

Fig. D2

*1: For 32ME303V/F7 (Serial No.:ME2), LF320EM4 (Serial No.:ME3), and

LF320EM4F (Serial No.: ME2) models, make sure to read all the precautions on page 4-1 when you disassemble/re-assemble the Stand Holder.

Jack Holder

[5] Power Supply CBA

(S-5)

(S-6)

[6] Digital Main CBA Unit

Fig. D3

4-3 FL13.8_DC

*2: Make sure to read all the precautions on pages 4-1 and 4-2 when you disassemble/re-assemble

the Front Cabinet or Function CBA Unit.

[9] Function CBA Unit

(S-7)

Sensor Lens

Control Plate

[8] Front Cabinet

Shield Plate

Hook

[7] LCD Panel Assembly

(S-7)

Fig. D4

4-4 FL13.8_DC

TV Cable Wiring Diagram

*1: all TYPE A models except for LF320FX4F(Serial No.: ME1)

*2: LF320FX4F(Serial No.: ME1) and all TYPE B models

To LCD Panel Assembly

Power Supply CBA

CN1001

To LCD Panel Assembly

Digital Main CBA Unit

CN3013

CN3006

CN601

To AC Cord

CN501

Function CBA Unit

CN4052

CN3701

CN3101

To Speaker

CN3801

Fig. D5

4-5 FL13.8_DC

ELECTRICAL ADJUSTMENT INSTRUCTIONS

Code: Pic code: Panel-Option code: MIPS:

Press "POWER" key to exit.

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

Safety: HDMI EDID: HDMI UART: Touch Sensor Ver:

Safety_Non ** OFF

-.-- / ---

Total Watch Time: Lightsensor:

***** **

"*" differs depending on the models.

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. Remote control unit

2. Color Analyzer, CA-310 (KONICA MINOLTA Luminance meter) or measuring instrument as good as CA-310.

How to set up the service mode:

Service mode:

1. Turn the power on.

2. Press [MENU] button to display Setup menu.

3. Select “Features”.

4. Select “Software Upgrade”.

5. Select “Current Software Info”.

6. Press [0], [4], [2], [5], [7], [4] and [INFO] buttons on the remote control unit in this order. The following screen appears.

5-1 FL13.7EA

1. Purity Check Mode

[7] button

Note:

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

Purity Check Mode

[7] button

White 50% mode

Red, Green, Blue mode

V-ramp mode

Black mode

[7] button

White mode

[7] button

White 20% mode

[7] button

Color Analyzer

To avoid interference from ambient light, this adjustment should be performed in a dark room.

Perpendicularity

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 the [7] button on the remote control unit is pressed, the display changes as follows.

The VCOM Adjustment should be performed when replacing the Digital Main CBA for LF320EM4(Serial No.: DS1), LF320EM4F(Serial No.: DS1), and LF320FX4F(Serial No.: DS1, DS2).

2. VCOM Adjustment

Test Point Adj. Point

Screen

M. EQ. Spec.

Color analyzer See below

[CHANNEL UP/DOWN]

buttons

Figure

1. Operate the unit for more than 60 minutes.

2. Set the color analyzer at the zero point calibration and bring the optical receptor pointing at the center of the LCD-Panel. Note: The optical receptor must be set perpendicular to the LCD Panel surface.

3. Enter the service mode.

4. Press [2] button on the remote control unit.

5. Press [CHANNEL UP/DOWN] buttons on the remote control unit so that the color analyzer value becomes minimum.

6. To cancel or to exit from the VCOM Adjustment, press [CH RETURN] or [PREV CH] button.

3. To cancel or to exit from the Purity Check Mode, press [CH RETURN] or [PREV CH] button.

5-2 FL13.7EA

The White Balance Adjustment should be

Color Analyzer

Perpendicularity

To avoid interference from ambient light, this adjustment should be performed in a dark room.

Internal (Single)

HDB 0

Internal (Single)

LDB 0

performed when replacing the LCD Panel or Digital Main CBA.

3. White Balance Adjustment

Purpose: To mix red and blue beams correctly for

pure white. Symptom of Misadjustment: White becomes bluish

or reddish.

6. Press [MENU] button. The internal Raster signal appears in the screen. (“Internal (Single)” appears in the upper right of the screen as shown below.)

ITEM

Color temperature

Input Signal

SPECIFICATION

x= 0.272 ± 0.003 y= 0.278 ± 0.003

Internal pattern (40/80% raster)

Measurement point Screen center

CA-310 (KONICA MINOLTA

M. EQ.

Luminance meter) or measuring instrument as good as CA-310.

60min.

Aging time

(Retail MODE/100IRE Raster HDMI 1080i@60)

MODE setting of TV

Ambient temperature

Shipment setting/ Retail MODE

25°C ± 5°C

1. Operate the unit for more than 60 minutes.

2. Enter the service mode.

3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode. “Drive” appears in the screen.

4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.

Note: The optical receptor must be set perpendicularly to the LCD Panel surface.

5. Press [3] button to select the “HDB” for High Drive Blue adjustment. (“HDB” appears in the screen.)

7. Press [CHANNEL UP/DOWN] buttons to adjust the color temperature becomes 12000°K (x

0.272 / y= 0.278 ± 0.003).

8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.

9. If necessary, adjust the “HDB” or “HDR” again.

10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.

11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.

12. If necessary, adjust the “LDB” or “LDR” again.

13. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode. If there is no message under “[WB]” section, this adjustment completes. If “Drive settings are NG. Retry again.” is displayed, repeat above steps from 5. to 12. Then check “Debugging Message” again. If “Drive settings are NG. Retry again.” is displayed, replace the LCD Panel or Digital Main CBA.

14. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button.

5-3 FL13.7EA

HOW TO INITIALIZE THE LCD TV

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 using the following procedure.

NOTE: Disconnect any device from the USB Port

before you conduct on this procedure.

1. Turn the power on.

2. Enter the service mode.

- To cancel the service mode, press [ ] button on the remote control unit.

3. Press [BACK] button to enter the Control Panel Key Confirmation Menu.

4. Press any button on the control panel.

5. Press [INFO] button to proceed with the self check mode.

6. Make sure to confirm the “INITIALIZED FINISH” appears in the green screen.

7. Unplug the AC Cord and plug it back on again.

6-1 FL13.8_INT

FIRMWARE RENEWAL MODE

USB port

USB storage device

Rear Cabinet

Software upgrade in progress. Please wait. Do not remove the USB storage device or turn the TV off while upgrade is in progress.

Software Upgrade

Downloading...

Current Version:

New Version:

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

"*" differs depending on the models.

Software Upgrade

The software upgrade is completed. Remove USB storage device, turn TV off then on again.

Equipment Required

a. USB storage device b. Remote Control Unit

Firmware Update Procedure

User Upgrade (Filename example: TVNB012_00_UF_XX91_AC.ecc)

Upgrade the firmware only. The setting values will not be initialized. The User Upgrade and the Firmware Upgrade (Factory Upgrade) will be done by the same file. If you want to upgrade the firmware and initialize the setting values also, add “FACT_” at the beginning of the filename. If you want to upgrade the firmware only and leave the setting values as they are, eliminate the “FACT_” from the filename.

Update procedure

1. Turn the power on.

2. Press [MENU] button to display Menu.

3. Select “Features”.

4. Select “Software Upgrade”.

5. Select “Upgrade” to display Upgrade screen.

6. Press [OK] button to display Software Upgrade screen.

7. Select “USB” and press [OK] button.

8. Insert the USB storage device to the USB port as shown below.

11. The update will start and the following will appear in the screen.

9. Select “Check” and press [OK] button.

10. Select “Upgrade” and press [OK] button to start software upgrade.

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

step 1.

The appearance shown in *1 is described as follows.

Appearance State

Downloading...

Writing...

Downloading the firmware from the USB storage device.

Writing the downloaded firmware in flash memory.

Checking... Checking the new firmware.

12. When the firmware update is completed, the following will appear in the screen.

Remove the USB storage device from the USB port. Turn the power off and turn the power on again.

7-1 FL13.8FW

Factory Upgrade (Firmware Upgrade/Flash Upgrade)

USB port

USB storage device

Rear Cabinet

Software upgrade in progress. Please wait. Do not remove the USB storage device or turn the TV off while upgrade is in progress.

Software Upgrade

Downloading...

Current Version:

New Version:

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

"*" differs depending on the models.

Software Upgrade

The software upgrade is completed. Remove USB storage device, turn TV off then on again.

Firmware Upgrade

(Filename example: FACT_TVNB012_00_UF_XX91_AC.ecc) Upgrade the firmware and initialize the setting values. The User Upgrade and the Firmware Upgrade (Factory Upgrade) will be done by the same file. If you want to upgrade the firmware and initialize the setting values also, add “FACT_” at the beginning of the filename. If you want to upgrade the firmware only and leave the setting values as they are, eliminate the “FACT_” from the filename.

Flash Upgrade

(Filename example: ALL_TVNB012_00_UF_XX91_AC.ecc) Upgrade the firmware and initialize the setting values along with the factory default such as White Balance, etc. Before the upgrade, you will need to make a note of all the factory default so you will be able to set it back on the TV after the initialization. The Flash Upgrade will be done by it's unique file. The User Upgrade/Firmware Upgrade (Factory Upgrade) file cannot be used for this upgrade.

Update procedure

1. Turn the power off.

2. Insert the USB storage device to the USB port as shown below.

The appearance shown in *1 is described as follows.

Appearance State

Downloading...

Writing...

Downloading the firmware from the USB storage device.

Writing the downloaded firmware in flash memory.

Checking... Checking the new firmware.

3. Turn the power on.

4. The update will start and the following will appear in the screen.

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

step 1.

5. When the firmware update is completed, the following will appear in the screen.

Remove the USB storage device from the USB port. Turn the power off and turn the power on again. Service mode initial screen with a word “INITIALIZED” will appear in the screen. The color of the word “INITIALIZED” will change from red to green when initialization is completed.

7-2 FL13.8FW

[Power Supply Section]

FLOW CHART NO.1

The power cannot be turned on.

TROUBLESHOOTING

Is the fuse (F602) normal?

Ye s

Is normal state restored when once unplugged power cord is plugged again after several seconds?

Ye s

Is the P-ON+21V line voltage normal?

Ye s

Check each rectifying circuit of the secondary circuit and repair it if defective.

FLOW CHART NO.2

The fuse blows out.

Check if there is any leak or short-circuit on the primary circuit component and repair it if defective.

Make sure to repair the pr

FLOW CHART NO.3

When the output voltage fluctuates.

imary circuit component before replacing the fuse

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

Check if there is any leak or short-circuit on the primary circuit component and repair it if defective. (C607, D601, D602, D603, D604, D605, D607A, D608, D609A, D621, D623, Q601, Q602, Q621, R611, T601)

Check if there is any leak or short-circuit on the each rectifying circuit component of se and repair it if defective.

(F602).

condary side

Does the photocoupler circuit on the secondary side operate normally?

Ye s

Check IC602, D605, D607A, D608, D609A, D610, D621, D623, Q601, Q602, Q621 and their per Repair it if defective.

FLOW CHART NO.4

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

Check if there is any short-circuit on the rectifying diode and the circuit Repair it if defective. (D650, D651, D653, D655, Q656, Q658)

iphery circuit.

Check IC602, D660, D661, Q653 and their periphery circuit. Repair it if defective.

in each rectifying circuit of the secondary side.

8-1 FL13.8ATR

FLOW CHART NO.5

P-ON+21V is not output.

Is approximately +21V voltage supplied to the cathode of D650(D651)?

Ye s

Check if there is any leak or short-circuit on the load circuit. Repair it if defective.

FLOW CHART NO.6

AMP+13V is not output.

Is approximately +13V voltage supplied to the cathode of D653(D655)?

Ye s

Check if there is any leak or short-circuit on the load circuit. Repair it if defective.

FLOW CHART NO.7

AL+3.3V is not output.

Check D650, D651, C651, C652, C653 and their periphery circuit. Repair it if defective.

Check D653, D654, D655, C654, C655 and their periphery circuit. Repair it if defective.

Is approximately +13V voltage supplied to the collector of Q656?

Ye s Ye s

Is approximately +4V voltage supplied to the base of Q656?

Ye s

Replace Q656.

Is approximately +13V voltage supplied to the emitter of Q658?

Replace Q658.

Check D662 and their periphery circuit. Repair it if defective.

Check D653, D654, D655, C654, C655, R690 and their periphery circuit. Repair it if defective.

8-2 FL13.8ATR

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