Funai LDD-A2006, LDD-B2006, LDD-C2006 Service Manual

SERVICE MANUAL

20" LCD TV/DVD

LDD-A2006/LDD-B2006/

LDD-C2006/LDD-D2006

20″ LCD TV/DVD

LDD-A2006/LDD-B2006/

LDD-C2006/LDD-D2006

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

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

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

Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

System Control Timing Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

Exploded Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1

Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1

Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-1

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.

Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories.

SPECIFICATIONS

< LCD TV Section >

<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. Video S/N (White 50%) CH-3 dB 45 40

3. Audio S/N (Output Level 500mV)

Description Condition Unit Nominal Limit

1. Number of Pixels Horizontal

2. Brightness

3. Response Time - msec 16 -

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

5. Viewing Angle Horizontal

PAL-BG/I/DK, SECAM-L SECAM-L’

Sound

PA L- B G PA L- I PAL-DK, SECAM-L SECAM-L’

–dB5347

Vert i c al

MHz MHz

MHz MHz MHz MHz

pixels pixels

cd/m

° °

38.9

33.9

33.4

32.9

32.4

40.4

640 x 3

480

420 -

-85 to 85

-85 to 70

<VIDEO>

Description Condition Unit Nominal Limit

1. Over Scan Horizontal

Vert i c al

2. Color Temperature -

x y

3. Resolution Horizontal

Vert i c al

% %

°K 8500

line line

8.5

6.5

0.29

0.30

400 350

10±5 10±5

0.29±0.03

0.30±0.03

<250 <300

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

Description Condition Unit Nominal Limit

1. Audio Output Power 10% THD: Lch/Rch W 0.95/0.95 0.75/0.75

2. Audio Distortion 500mW: Lch/Rch % 0.6/0.6 <4

3. Audio Freq. Response

4. Audio S/N VIDEO 1

6dB: Lch

6dB: Rch

VIDEO 2

Hz Hz

dB dB

50 to 12K 50 to 12K

43 55

40 40

1-1 L4670SP

Description Condition Unit Nominal Limit

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

2. Video S/N at CN3400 (TDV-540 TIT.2 CHP.6) --- dB 60 55

3. S/N Chroma at CN3400

(TDV-540 TIT.2 CHP.17)

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

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

5. Audio freq. response (LPCM 48 kHz)

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

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

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

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.

AM --- dB 58 53

PM --- dB 58 53

L, 20 Hz

R, 20 Hz

L, 20 kHz

R, 20 kHz

% 0.03 0.07

dB 0 +4/-5

dB 85 75

1-2 L4670SP

LASER BEAM SAFETY PRECAUTIONS

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

Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

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.

Drive Mechanism Assembly

Laser Beam Radiation

Laser Pickup

Turntable

CAUTION- CLASS

TION WHEN OPEN. DO NOT VIEW

DIRECTLY WITH OPTICAL INSTRUMENTS

LASER RADIA

Location: Top of DVD mechanism.

2-1 E7PLSP

IMPORTANT SAFETY PRECAUTIONS

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

Safety Precautions for LCD TV Circuit

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

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

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

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

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

b. Be sure that there are no cabinet openings

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

c. Antenna Cold Check - With the instrument AC

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

d. Leakage Current Hot Check - With the

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

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

READING SHOULD NOT BE ABOVE 0.5 mA

LEAKAGE

DEVICE

BEING

TESTED

TEST ALL EXPOSED METAL SURFACES

ALSO TEST WITH PLUG REVERSED USING AC ADAPTER PLUG AS REQUIRED

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

2. Read and comply with all caution and safety-

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

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

CURRENT

TESTER

EARTH GROUND

3-1 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.

3-2 LTVP_ISP

Precautions during Servicing

A. Parts identified by the ! symbol are critical for

safety. Replace only with part number specified.

B. In addition to safety, other parts and assemblies

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

C. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1) Insulation Tape

2) PVC tubing

3) Spacers

4) Insulators for transistors.

E. When replacing AC primary side components

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

F. Observe that the wires do not contact heat

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

G. Check that replaced wires do not contact sharp

edged or pointed parts.

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

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

I. Also check areas surrounding repaired locations.

J. Use care that foreign objects (screws, solder

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

K. Crimp type wire connector

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

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

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

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

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

L. When connecting or disconnecting the internal

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

M. When installing parts or assembling the cabinet

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

3-3 LTVP_ISP

Safety Check after Servicing

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

1. Clearance Distance

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

Table 1 : Ratings for selected area

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

230 V

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

≥ 3mm(d)

≥ 6 mm(d’)

2. Leakage Current Test

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

Chassis or Secondary Conductor

Primary Circuit

d' d

Exposed Accessible Part

AC Voltmeter (High Impedance)

Fig. 1

Measuring Method : (Power ON)

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

Table 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in

parallel

230 V

50kΩ RES.

Connected in

parallel

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

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

One side of

Power Cord Plug Prongs

One side of power cord plug

prongs (B) to:

Antenna terminals

A/V Input, Output

Fig. 2

RF or

3-4 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.

Input

Bottom View

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)

Pin 1

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.

FFC Cable

Connector

CBA

* Be careful to avoid a short circuit.

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)

4-1 TVP_SN

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

Machine

Flat Pack-IC

Tweezers

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)

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.

Hot Air Blower

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)

Sharp Pin

Fine Tip Soldering Iron

Fig. S-1-4

To Solid Mounting Point

CBA

Tweezers

Iron Wire

Soldering Iron

Fig. S-1-5

Fine Tip Soldering Iron

Flat Pack-IC

Fig. S-1-6

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

4-2 TVP_SN

2. Installation

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

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

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

Example :

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

Fig. S-1-7

Instructions for Handling Semiconductors

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

1. Ground for Human Body

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

2. Ground for Workbench

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

CBA

Presolder

Flat Pack-IC

Fig. S-1-8

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

4-3 TVP_SN

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

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

[14] Speaker(s)

[8] Inverter CBA

[3] Jack Holder

[12] Function CBA

[2] Rear Cabinet

[4] DVD Main CBA Unit

[5] DVD Mechanism

[6] DVD Holder(L)

[7] DVD Holder(R)

[9] Main CBA

[10] Tilt Stand Holder

[11] LCD Main CBA Unit & Liquid Crystal Panel Unit

[15] Front Cabinet

[13] IR Sensor CBA

[1] Tilt Stand Assembly

[16] Stand Cover

[17] Arm Holder

[18] Sheet L, R

[19] Arm Assembly

2. Disassembly Method

Removal

Step/

Loc.

No.

[1]

Part

Tilt Stand Assembly

Remove/*Unhook/

Fig.

No.

Unlock/Release/

Unplug/Unclamp/

Note

Desolder

D1 4(S-1) ---

Removal

Step/

Loc.

No.

Part

Remove/*Unhook/

Fig.

No.

Unlock/Release/

Unplug/Unclamp/

Note

Desolder

DVD

[7]

[8]

Holder(R)

Inverter CBA

D2 2(S-9) ---

4(S-10), *CN301,

*CN302, *CN303,

*CN304, *CN310

8(S-11), *CN53,

[9] Main CBA

*CN801, *CN101B,

*CN102B, *CN103B, *CN1651

Tilt Stand

[10]

Holder

D3 2(S-12) ---

LCD Main

[11]

CBA Unit & Liquid Crystal

13(S-13), *CN106 ---

Panel Unit

Function

[12]

CBA

IR Sensor

[13]

CBA

[14] Speaker(s) D4

Front

[15]

Cabinet

Stand

[16]

Cover

D4 5(S-14) ---

D4 (S-15) ---

4(S-16), Speaker Holder (s)

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

D5 6(S-17) ---

[17] Arm Holder D5 2(S-18) ---

[18] Sheet L, R D5 --------------- ---

Arm

[19]

↓

(1)

Assembly

↓

(2)

D5 --------------- ---

↓

(3)

↓

(4)

---

↓

(5)

Rear

[2]

Cabinet

D1 9(S-2), 2(S-3) ---

[3] Jack Holder D2 (S-4), 3(S-5) ---

DVD Main

[4]

CBA UnitD2D6

(S-6), *CN201, *CN301, *CN401, *CN601, *CN801

DVD

[5]

Mechanism

D2 4(S-7)

3 4 5

DVD

[6]

Holder(L)

D2 2(S-8) ---

5-1 L4670DC

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, 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

Table."

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 Connectors (CN301), (CN401),

(CN601) and (CN801). Remove three Screws (S-6) 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) Remove the Rear Cabinet and DVD Cover.

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

screw (S-6) 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

5-2 L4670DC

[2] Rear Cabinet

[1] Tilt Stand Assembly

(S-2)

(S-3)

(S-2)

(S-3)

(S-2)

(S-1)

Fig. D1

5-3 L4670DC

(S-5)

[6] DVD Holder (L)

[5] DVD Mechanism

(S-8)

(S-9)

(S-4)

[3] Jack Holder

(S-7)

[7] DVD Holder (R)

(S-7)

(S-5)

(S-7)

(S-6)

[4] DVD Main CBA Unit

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

Chassis Cover

Pin A

Either of two places

Screws A

FPC Cable

View for A

Hole A

Main Chassis

Fig. D2

5-4 L4670DC

(S-10)

[10]Tilt Stand Holder

[15] Front Cabinet

(S-12)

(S-11)

[9] Main CBA

(S-11)

[8] Inverter CBA

(S-10)

Fig. D3

(S-14)

[14] Speaker

Speaker Holders

(S-16)

[14] Speaker

[13] IR Sensor CBA

(S-15)

[11] LCD Main CBA Unit & Liquid Crystal Panel Unit

[12] Function CBA

(S-14)

Speaker Holders

(S-13)

Fig. D4

5-5 L4670DC

[17] Arm Holder

[16] Stand Cover

[19] Arm Assembly

[18] Sheet L

(S-17)

(S-18)

[18] Sheet R

(S-17)

Fig. D5

5-6 L4670DC

TV Cable Wiring Diagram

To DVD Mechanism

DVD Main CBA Unit

CN201

CN601

CN301

CN801

CN401

LCD Main CBA Unit

To Liquid Crystal Panel Unit

Function CBA

CLN904

CN801

CN1701

CN311 CN312

CN1751

CN1761

CN103B

CN103A

CN53

CN102B

CN102A

CN1651

CN106

CN101B

CN101A

Main CBA

CN404

Inverter CBA

CN301

CN304

CN302

CN303

CN310

To Liquid Crystal Panel Unit

To Speaker

IR Sensor CBA

CLN53

To Speaker

Fig. D6

5-7 L4670DC

ELECTRICAL ADJUSTMENT INSTRUCTIONS

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

bly.” NOTE:

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

Test Equipment Required

1. DC Voltmeter

2. Pattern Generator

3. Color Analyzer

How to Set up the Service mode:

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

2. 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.

1. Initial Setting

General

Enter the Service mode.

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

Table 1: Initial Data

BUTTON

ITEM

BRT(PAL) CNT(PAL) 140 CLR-R(PAL) 70 CLR-B(PAL) 70 SHR(PAL) 143 S-BRT(PAL) S-CNT(PAL) 140 S-CLR-R(PAL) 70 S-CLR-B(PAL) 70 S-SHR(PAL) 143 C-BRT(PAL) C-CNT(PAL) 128 C-CLR-R(PAL) 120 C-CLR-B(PAL) 120 C-SHR(PAL) 143 BRT(SECAM) CNT(SECAM) 140 CLR-R(SECAM) 70 CLR-B(SECAM) 70 SHR(SECAM) 143 S-BRT(SECAM) S-CNT(SECAM) 140 S-CLR-R(SECAM) 70 S-CLR-B(SECAM) 70 S-SHR(SECAM) 143 C-BRT(SECAM) C-CNT(SECAM) 128 C-CLR-R(SECAM) 120 C-CLR-B(SECAM) 120 C-SHR(SECAM) 143 BRT(NTSC) CNT(NTSC) 138 CLR-R(NTSC) 77 CLR-B(NTSC) 77 TNT(NTSC) 120 SHR(NTSC) 143 S-BRT(NTSC) S-CNT(NTSC) 138 S-CLR-R(NTSC) 74 S-CLR-B(NTSC) 74 S-TNT(NTSC) 120 S-SHR(NTSC) 143

(on the remote

control)

MENU → 1

MENU → 2

MENU → 3

MENU → 4

MENU → 5

MENU → 6

MENU → 7

MENU → 8

DATA

VALUE

130

133

128

130

133

128

6-1 L4670EA

BUTTON

ITEM

C-BRT(NTSC) C-CNT(NTSC) 128 C-CLR-R(NTSC) 150 C-CLR-B(NTSC) 150 C-TNT(NTSC) 120 C-SHR(NTSC) 143 BRIGHT 0 0 NORMAL 0 65 DARK 0 98 COR(C/D/S-1) VOL. p → 1 128 COG(C/D/S-1) VOL. p → 2 128 COB(C/D/S-1) VOL. p → 3 128 DR(C/D/S-1) VOL. p → 4 180 DG(C/D/S-1) VOL. p → 5 180 DB(C/D/S-1) VOL. p → 6 180 SBR(C/D/S-1) VOL. p → 70 SBB(C/D/S-1) VOL. p → 90 C-COR(C/D/S-2) VOL. p → 1 128 C-COG(C/D/S-2) VOL. p → 2 128 C-COB(C/D/S-2) VOL. p → 3 128 C-DR(C/D/S-2) VOL. p → 4 140 C-DG(C/D/S-2) VOL. p → 5 140 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 *1 NCM ON ASPECT OFF RUSSIAN OFF

(on the remote

control)

MENU → 9

VOL. p

DATA

VALUE

128

2. Flicker Adjustment

1. Enter the Service mode. (See page 6-1.)

2. Press [2] button on the remote control unit. The following screen appears.

VCOM

128

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

VCOM

128

FLASH (Go and Off)

4. Press [CH. o / p] buttons on the remote control unit so that flash stops.

*1 PAL-BG (LDD-A2006), PAL-I (LDD-B2006),

SECAM-L (LDD-C2006), PAL-BG/DK (LDD-D2006)

6-2 L4670EA

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

3. White Balance Adjustment

Purpose: To mix red, green and blue beams correctly

for pure white. Symptom of Misadjustment: White becomes bluish

or reddish.

Test Point Adj. Point Mode Input

[RF/AV2(CVBS)]

Screen

VOL. p buttons

M. EQ. Spec.

C/D/S-1

[AV1(RGB)]

C/D/S-2

White Purity

(APL 80%)

(APL 40%)

6. [AV1(RGB)]----(APL 80%) Press [6] button to select “C-DB(C/D/S-2)” for Blue adjustment. Press [4] button to select “C-DR(C/D/ S-2)” for Red adjustment.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.”

[AV1(RGB)]----(APL 40%)

Press [3] button to select “C-COB(C/D/S-2)” for Blue adjustment. Press [1] button to select “CCOR(C/D/S-2)” for Red adjustment.When “x” value and “y” value are not within specification, a d j u s t “ C - C O B ( C / D / S - 2 ) ” o r “ C - C O R ( C / D / S - 2 ) ” . Refer to “1. Initial Setting.”

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

Pattern Generator,

Color analyzer

Figure

x: 285 to 295,

y: 295 to 305

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.

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)]----(APL 80%) Press [6] button to select “DB(C/D/S-1)” for Blue adjustment. Press [4] button to select “DR(C/D/S-

1)” for Red adjustment. 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.”

[RF/AV2(CVBS)]----(APL 40%)

Press [3] button to select “COB(C/D/S-1)” for Blue adjustment. Press [1] button to select “COR(C/D/ S-1)” for Red adjustment. When “x” value and “y” value are not within specification, adjust “COB (C/ D/S-1)” or “COR (C/D/S-1)”. Refer to “1. Initial Setting.”

Color Analyzer

6-3 L4670EA

HOW TO INITIALIZE THE LCD TV/DVD

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

< DVD Section >

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

remote control unit in that order. Fig. g appears on the screen.

" differs depending on the models.

*******

MODEL : *******

Version Region

: *.**

: *

EXIT: SELECTEEPROM CLEAR : CLEAR

Fig. g

" differs depending on the models.

*******

: *.**

: *

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

Fig. h appears on the screen.

MODEL : *******

< LCD TV Section >

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.

EEPROM CLEAR : OK

EXIT: SELECTEEPROM CLEAR : CLEAR

Fig. h

When “OK” appears on the screen, the factory default will be set.

3. To exit this mode, press [CH. o / p] or [SELECT]

button to go to TV mode, or press [STANDBY] button to turn the power off.

7-1 L4670INT

+ 51 hidden pages