Funai LCD-A2005 Service Manual

SERVICE MANUAL

20" COLOR LCD TELEVISION

LCD-A2005

20″ COLOR LCD TELEVISION

LCD-A2005

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

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.

Schematic Diagrams.............................................. 8-3

CBA Views and Test Points..... ....... ...... ....... ........ 8-11

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

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

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

Packing Exploded View....................................... 11-2

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

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

SPECIFICATIONS

<TUNER> ANT. Input------------------- 80 dBµV, Video: PAL 87.5%, Audio: 30 kHz dev (1 kHz Sin)

Test Input Signal----------- 400Hz 30% modulation

Description Condition Unit Nominal Limit

1. Intermediate Freq. Picture

2. Color Killer Sens. CH-3 dBµV 20 23

3. AFT Pull In Range (10mV input)

Sound

– MHz ±1.6 ±0.7

Description Condition Unit Nominal Limit

1. Number of Pixels Horizontal Vertical

2. Brightness

3. Response Time - msec 16 -

4. Support Color - - 16mil.(8bit) -

5. Viewing Angle Horizontal Vertical

MHz MHz

pixels pixels

cd/m

° °

45.75

41.25

640 x 3

480

450 -

-85 to 85

-85 to 70

<VIDEO>

Description Condition Unit Nominal Limit

1. Over Scan Horizontal

2. Color Temperature -

3. Resolution Horizontal

<AUDIO>

Description Condition Unit Nominal Limit

1. Audio Output Power 10% THD: Lch/Rch W 1.0/1.0 0.8/0.8

2. Audio Distortion 500mW: Lch/Rch % 1.0/1.0 <3

3. Audio Freq. Response

4. Audio S/N RF

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.

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

Vertical

6dB: Lch

6dB: Rch

VIDEO 1 VIDEO 2

x y

% %

°K 8500

line line

Hz Hz

dB dB dB

8.5

6.5

0.29

0.30 400

350

50 to 12K 50 to 12K

60 60 60

10±5 10±5

0.29±0.03

0.30±0.03 <250

<300

45 45 45

1-1 L4100SP

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 C old Chec k - With the instrument AC

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

d. Leakage Current Hot Check - With the

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

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

READING SHOULD NOT BE ABOVE 0.5 mA

LEAKAGE

DEVICE

BEING

TESTED

TEST ALL EXPOSED METAL SURFACES

ALSO TEST WITH PLUG REVERSED USING AC ADAPTER PLUG AS REQUIRED

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

2. Read and comply with all caution and safety-

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

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

CURRENT

TESTER

EARTH GROUND

2-1 LTVP_ISP

4. Hot Chassis Warning -

a. Some TV receiver chassis are electrically

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

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

b. Some TV receiver chassis normally have 85V

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

c. Some TV receiver chassis have a secondary

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

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

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

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

2-2 LTVP_ISP

Precautions during Servicing

A. Parts identified by the ! symbol are critical for

safety. Replace only with part number specified.

B. In addition to safety, other parts and assemblies

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

C. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1) In sulation 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 powe r cord ha s been re place d, chec k th at

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

I. Also check areas surrounding repaired locations. J. Use care that foreign objects (screws, solder

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

K. Crimp type wire connector

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

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

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

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

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

L. When connecting or disconnecting the internal

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

M. When installing parts or assembling the cabinet

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

2-3 LTVP_ISP

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform th e following t ests and c onfirm the specifi ed values in order to verify c ompliance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearance dis tance (d) and (d') between sol dered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area

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

230 V

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

≥ 3mm(d)

≥ 6 mm(d’)

2. Leakage Current Test

Confirm the specified (or lower) leakage current between B (eart h ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio in put and outpu t terminals, microphone jacks, earphone jacks, etc.).

Chassis or Secondary Conductor

Primary Circuit

d' d

Exposed Accessible Part

AC Voltmeter (High Impedance)

Fig. 1

Measuring Method : (Power ON)

Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC v olt mete r to me asur e acr oss bo th termina ls of load Z. See Fig. 2 and following table.

Table 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in

parallel

230 V

50kΩ RES.

Connected in

parallel

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

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

One side of

Power Cord Plug Prongs

One side of power cord plug

prongs (B) to:

Antenna terminals

A/V Input, Output

Fig. 2

RF or

2-4 LTVP_ISP

STANDARD NOTES FOR SERVICING

Circuit Board Indications

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

Top View

Out

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

Pin 1

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

Pin 1

Input

Bottom View

Pb (Lead) Free Solder

Pb free mark will be found on PCBs which use Pb free solder . (Re fer to figure.) Fo r PCBs with Pb fre e mark, be sure to use Pb free solder. For PCBs without Pb free mark, use standard solder.

Pb free mark

How to Remove / Install Flat Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:

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

Fig. S-1-1

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

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

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

CAUTION:

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

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

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

Hot-air Flat Pack-IC Desoldering

CBA

Masking Tape

Tweezers

3-1 TVP_SN

Machine

Flat Pack-IC

Fig. S-1-2

With Soldering Iron:

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

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

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

With Iron Wire:

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

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

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

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

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

Note: When using a soldering iron, care must be

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

Sharp Pin

Fine Tip Soldering Iron

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

Fig. S-1-4

To Solid Mounting Point

CBA

Hot Air Blower

Iron Wire

Soldering Iron

Fig. S-1-5

Fine Tip Soldering Iron

Flat Pack-IC

Tweezers

Fig. S-1-6

3-2 TVP_SN

2. Installation

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

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

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

Example :

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

Fig. S-1-7

Instructions for Handling Semiconductors

Electrostatic breakdown of the semi-cond uc tors 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

Presolder

Flat Pack-IC

Fig. S-1-8

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

3-3 TVP_SN

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembl y Flowchart

This flowchart indicates the disassembly steps fo r the cabinet part s and the CBA in order to gain acces s to item(s) to be ser vic ed. When r eassembling, follow the steps in reverse order. Bend, route and dress the cables as they were.

[9] IR Sensor CBA

[10] Speaker (s)

[6] Inverter CBA

[8] Function CBA

[1] Rear Cabinet

[2] Jack Holder

[3] Jack Shield

[5] Main CBA

[7] LCD Module

Assembly

[11] Front Cabinet

[4] LCD Main CBA

2. Disassembly Method

REMOVAL

ID/

LOC

PART

No.

[1] Rear Cabinet D1 11(S-1) --[2] Jack Holder D2 2(S-2), (S-3) --[3] Jack Shield D2 ---------- ---

LCD Main

[4]

CBA

[5] Main CBA

[6] Inverter CBA

LCD Module

[7]

Assembly

[8] Function CBA

REMOVE/ *UNHOOK/UNLOCK/

Fig. No.

RELEASE/UNPLUG/ DESOLDER

3(S-4), *CN310A, *CN311A, *CN313A,

D2 D3

*CN101B, *CN102B, *CN103B

6(S-5), *CN801,

*CN802, *CN405,

*CN51, *CN53 6(S-6), *T1401,

*T1402, *T1403,

*T1404

13(S-7) ---

D3 D2

3(S-8) ---

Note

---

IR Sensor

[9]

CBA

[10] Speaker (s)

2(S-9) ---

D3 D2

4(S-10) ---

[11] Front Cabinet D2 --------------- ---

↓

(1)

↓

(2)

(3)

↓

(4)

↓

(5)

(1):Order of ste ps in Procedure. When reass embling,

follow the steps in reverse order.These numbers are also used as the Identif ica tion ( lo cat io n) No. of

parts in Figures. (2):Parts to be removed or installed. (3):Fig. No. showing Procedure of Part Location. (4):Identification of part to be removed, unhooked,

unlocked, released, unplugged, unclamped, or

desoldered.

S=Screw, P=Spring, L=Locking Tab, CN=Connec-

tor, *=Unhook, Unlock, Release, Unplug, or Desol-

der

2(S-2) = two screws (S-2) (5):Refer to the following Reference Notes in the

Table.

4-1 L4264DC

(S-1)

[11] Front Cabinet

(S-1)

[1] Rear Cabinet

(S-1)

[8] Function CBA

(S-8)

(S-1)

Fig. D1

(S-9)

[9] IR Sensor CBA

[7] LCD Module Assembly

(S-10)

[10] Speaker

(S-8)

[10] Speaker

(S-10)

(S-7)

[6] Inverter CBA

(S-7)

(S-6)

(S-7)

(S-6)

(S-7)

[3] Jack Shield

[5] Main CBA

(S-5)

[2] Jack Holder

(S-2)

(S-3)

(S-2)

(S-5)

(S-4)

[4] LCD Main CBA

Fig. D2

4-2 L4264DC

Cable Wiring Diagram

To LCD Module Assembly

Inverter CBA

CN1403

CN1402

CN1401

CN1405

CN1404

LCD Main CBA

Main CBA

CN405

CN310A

CN301 CN104

CN101B

CN101A CN102A

CN801

CN311A

CN102B CN103B

CN103A

CN313A

CN53

CN105

CN51

CN802

To Speaker

CN51ACLN53

To Speaker

Function CBAIR Sensor CBA

Fig. D3

4-3 L4264DC

HOW TO INITIALIZE THE LCD TELEVISION

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

How to initialize the LCD television:

1. Turn the power on. (Use main power on the TV unit.)

2. To enter the service mode, press [STANDBY], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds.

- To cancel the service mode, press [STANDBY]

button on the remote control.

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

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

5-1 L4100INT

ELECTRICAL ADJUSTMENT INSTRUCTIONS

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

bly.” NOTE:

Electrical adjustment s are r equir e d after repl acing circuit components and certain me chanical parts. It is important to perform these adju stments on ly after all repairs and replace ments have b een co mplete d. Also, do not attempt these adjust ments unless th e proper equipment i s ava ilab le.

Test Equipment Required

1. DC Voltmeter

2. Pattern Generator

3. Color Analyzer

How to Set up the Service mode:

1. Turn the power on. (Use main power on the TV unit.)

2. Press [ST ANDBY], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds.

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

1. Initial Setting

General

Enter the Service mode.

Set the each initial data as shown on table 1 be low.

Table 1: Initial Data

BUTTON

ITEM

BRT(PAL) CNT(PAL) 174 CLR-R(PAL) 74 CLR-B(PAL) 74 SHR(PAL) 143 S-BRT(PAL) S-CNT(PAL) 174 S-CLR-R(PAL) 74 S-CLR-B(PAL) 74 S-SHR(PAL) 143 C-BRT(PAL) C-CNT(PAL) 132 C-CLR-R(PAL) 154 C-CLR-B(PAL) 154 C-SHR(PAL) 143 BRT(SECAM) CNT(SECAM) 174 CLR-R(SECAM) 74 CLR-B(SECAM) 74 SHR(SECAM) 143 S-BRT(SECAM) S-CNT(SECAM) 174 S-CLR-R(SECAM) 74 S-CLR-B(SECAM) 74 S-SHR(SECAM) 143 C-BRT(SECAM) C-CNT(SECAM) 132 C-CLR-R(SECAM) 154 C-CLR-B(SECAM) 154 C-SHR(SECAM) 143 BRT(NTSC) CNT(NTSC) 174 CLR-R(NTSC) 70 CLR-B(NTSC) 70 TNT(NTSC) 148 SHR(NTSC) 143 S-BRT(NTSC) S-CNT(NTSC) 174 S-CLR-R(NTSC) 70 S-CLR-B(NTSC) 70 S-TNT(NTSC) 148 S-SHR(NTSC) 143

(on the remote

control)

MENU → 1

MENU → 2

MENU → 3

MENU → 4

MENU → 5

MENU → 6

MENU → 7

MENU → 8

DAT A

VALUE

134

6-1 L4264EA

BUTTON

ITEM

C-BRT(NTSC) C-CNT(NTSC) 132 C-CLR-R(NTSC) 154 C-CLR-B(NTSC) 154 C-TNT(NTSC) 148 C-SHR(NTSC) 143 BRIGHT 0 0 NORMAL 0 65 DARK 0 98 COR(C/D/S-1) VOL. p → 1 131 COG(C/D/S-1) VOL. p → 2 131 COB(C/D/S-1) VOL. p → 3 131 DR(C/D/S-1) VOL. p → 4 145 DG(C/D/S-1) VOL. p → 5 143 DB(C/D/S-1) VOL. p → 6 140 SBR(C/D/S-1) VOL. p → 70 SBB(C/D/S-1) VOL. p → 90 C-COR(C/D/S-2) VOL. p → 1 131 C-COG(C/D/S-2) VOL. p → 2 131 C-COB(C/D/S-2) VOL. p → 3 131 C-DR(C/D/S-2) VOL. p → 4 145 C-DG(C/D/S-2) VOL. p → 5 143 C-DB(C/D/S-2) VOL. p → 6 140 C-SBR(C/D/S-2) VOL. p → 70 C-SBB(C/D/S-2) VOL. p → 90 7F LAST POWER OFF SYSTEM NCM ON ASPECT OFF RUSSIAN OFF

(on the remote

control)

MENU → 9

VOL. p

DAT A

VALUE

134

PAL-BG

3. Flicker Adjustment

Adjustment Point: R977 (LCD Main CBA)

LCD Main CBA

R977

1. Enter the Service mode.

2. Press “2” button on the remote control unit. The following screen appears.

3. If Flicker Adjustment is not fit, the screen become the following.

FLASH (Go and Off)

2. +B Adjustment

Purpose: To obtain correct operation. Symptom of Misadjustment: The picture is da r k and

the unit does not operate correctly.

Test Point Adj. Point

TP401 (+B)

TP300 (GND)

M. EQ. Spec.

DC Voltmeter +21.0±0.3V DC

Note: TP401(+B), TP300(GND), VR649 --- Main CBA

1. Connect DC Volt Meter to TP401 and TP300(GND).

2. Adjust VR649 so that the voltage of TP401 becomes +21.0±0.3V DC.

VR649

4. Adjust R977 so that flash stops.

6-2 L4264EA

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

4. White Balance Adjustment

Purpose: To m ix red, green a nd blue beam s co rrectly

for pure white. Symptom of Misadjustment: White becomes bluish

or reddish.

Test Point Adj. Point Mode Input

[RF/AV2(CVBS)]

Screen

Pattern Generator,

Color analyzer

VOL. p

buttons

M. EQ. Spec.

C/D/S-1

[AV1(RGB)]

C/D/S-2

Figure

x: 260 to 320,

y: 270 to 330

White Purity

(APL 80%)

(APL 40%)

It carries out in a darkroom.

Perpendicularity

L = 3 cm

INPUT: WHITE 80%

1. Operate the unit for more than 20 minutes.

2. Input the White Purity (APL 80% or APL 40%).

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. [RF/AV2(CVBS)] Enter the Service mode. Press “VOL p” button on the remote control unit and select “C/D/S-1” mode.

[AV1(RGB)]

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

5. [RF/AV2(CVBS)] When “x” value and “y” value are not within specification, adjust “DB (C/D/S-1)” or “DR (C/D/S-

1)”. Refer to “1. Initial Setting.” Note: “DB(C/D/S1)” or “DR(C/D/S1)” must be adjusted within ±10.

[AV1(RGB)]

When “x” value and “y” value are not within specification, adjust “C-DB(C/D/S-2)” or “C-DR(C/ D/S-2)”. Refer to “1. Initial Setting.” Note: “C-DB(C/D/S-2)” or “C-DR(C/D/S-2)” must be adjusted within ±10.

6. Turn the power off and on again. (Main power button on the TV unit.)

Color Analyzer

6-3 L4264EA

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