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

PAL-BG/I/DK, SECAM-L

MHz

38.9

-

SECAM-L’

MHz

33.9

-

Sound

PAL-BG

MHz

33.4

-

PAL-I

MHz

32.9

-

PAL-DK, SECAM-L

MHz

32.4

-

SECAM-L’

MHz

40.4

-

2.

Video S/N (White 50%)

CH-3

dB

45

40

3.

Audio S/N

–

dB

53

47

(Output Level 500mV)

<LCD PANEL>

Description

Condition

Unit

Nominal

Limit

1.

Number of Pixels

Horizontal

pixels

640 x 3

-

Vertical

pixels

480

-

2.

Brightness

cd/m2

420

-

3.

Response Time

-

msec

16

-

4.

Support Color

-

-

16mil.(8bit)

-

5.

Viewing Angle

Horizontal

°

-85 to 85

-

Vertical

°

-85 to 70

<VIDEO>

Description

Condition

Unit

Nominal

Limit

1.

Over Scan

Horizontal

%

8.5

10±5

Vertical

%

6.5

10±5

2.

Color Temperature

-

°K

8500

-

x

0.29

0.29±0.03

y

0.30

0.30±0.03

3.

Resolution

Horizontal

line

400

<250

Vertical

line

350

<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

-6dB: Lch

Hz

50 to 12K

-

-6dB: Rch

Hz

50 to 12K

-

4. Audio S/N

VIDEO 1

dB

43

40

VIDEO 2

dB

55

40

1-1

L4670SP

<DVD Section>

	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			AM	---	dB	58	53
	(TDV-540 TIT.2 CHP.17)		PM	---	dB	58	53
4.	Audio Distortion (LPCM 48 kHz, W/LPF)			L	%	0.03	0.07
	(PTD 1-NOR TIT.1 CHP.1)			R
				L, 20 Hz
5.	Audio freq. response (LPCM 48 kHz)			R, 20 Hz	dB	0	+4/-5
	(PTD 1-NOR TIT.1 CHP.5 -- 10)			L, 20 kHz
				R, 20 kHz
6.	Audio S/N (LPCM 48 kHz, W/LPF, A-WTD)			L	dB	85	75
	(PTD 1-NOR TIT.1 CHP.1 -- 2)			R

Note: Nominal specifications represent the design specifications. All units should be able to approximate these. Some will exceed and some may drop slightly below these specifications. Limit specifications represent the absolute worst condition that still might be considered acceptable. In no case should a unit fail to meet limit specifications.

1-2

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

CAUTIONCLASS 1MLASER RADIA- -TION WHEN OPEN. DO NOT VIEW

DIRECTLY WITH OPTICAL INSTRUMENTS

Location: Top of DVD mechanism.

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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	CURRENT
	BEING	TESTER
			_
	TESTED	+
	TEST ALL EXPOSED
	METAL SURFACES
	ALSO TEST WITH
	PLUG REVERSED
	USING AC		EARTH
	ADAPTER PLUG
	AS REQUIRED		GROUND

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

2.Read and comply with all caution and safetyrelated 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.

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’)

≥ 3mm(d) 230 V ≥

6 mm(d’)

Chassis or Secondary Conductor
	Primary Circuit
d'	d

Fig. 1

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

2. Leakage Current Test

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

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

Exposed Accessible Part

	Z	AC Voltmeter
		(High Impedance)

BOne side of

Power Cord Plug Prongs

Fig. 2

	AC Line Voltage	Load Z	Leakage Current (i)	One side of power cord plug
				prongs (B) to:
		2kΩ RES.	i≤0.7mA AC Peak	RF or
		Connected in
			i≤2mA DC	Antenna terminals
		parallel
	230 V
		50kΩ RES.	i≤0.7mA AC Peak
		Connected in		A/V Input, Output
			i≤2mA DC
		parallel

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

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	Bottom View
Out	Input
	In

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

5

Pin 1

10

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

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.

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)

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	Machine
Masking	Flat Pack-IC
Tape
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)

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

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)

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

or

Iron Wire

Soldering Iron

To Solid

Mounting Point

Fig. S-1-5

CBA	Fine Tip
	Soldering Iron
	Flat Pack-IC
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

Presolder

Flat Pack-IC

CBA

Fig. S-1-8

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.

<Incorrect>
	CBA
<Correct>	Grounding Band
	1MΩ
	CBA
1MΩ

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)			[12] Function				[13] IR Sensor
			CBA				CBA
							[1] Tilt Stand
[8] Inverter CBA			[2] Rear Cabinet
							Assembly
[3] Jack Holder			[4] DVD Main				[16] Stand Cover
			CBA Unit
			[5] DVD				[17] Arm Holder
			Mechanism
			[6] DVD				[18] Sheet L, R
			Holder(L)
			[7] DVD				[19] Arm
			Holder(R)				Assembly

[9]Main CBA

[10]Tilt Stand Holder

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

[15]Front Cabinet

2.Disassembly Method

				Removal
	Step/
				Remove/*Unhook/
	Loc.	Part
			Fig.	Unlock/Release/	Note
	No.
			No.	Unplug/Unclamp/
				Desolder
	[1]	Tilt Stand	D1	4(S-1)	---
		Assembly
	[2]	Rear	D1	9(S-2), 2(S-3)	---
		Cabinet
	[3]	Jack Holder	D2	(S-4), 3(S-5)	---
		DVD Main	D2	(S-6), *CN201,
	[4]			*CN301, *CN401,	1
		CBA Unit	D6	*CN601, *CN801
					2
	[5]	DVD	D2	4(S-7)	3
		Mechanism			4
					5
	[6]	DVD	D2	2(S-8)	---
		Holder(L)

				Removal
	Step/
				Remove/*Unhook/
	Loc.	Part
			Fig.	Unlock/Release/	Note
	No.
			No.	Unplug/Unclamp/
				Desolder
	[7]	DVD	D2	2(S-9)	---
		Holder(R)
		Inverter	D3	4(S-10), *CN301,
	[8]			*CN302, *CN303,	---
		CBA	D6	*CN304, *CN310
				8(S-11), *CN53,
	[9]	Main CBA	D3	*CN801, *CN101B,	---
			D6	*CN102B, *CN103B,
				*CN1651
	[10]	Tilt Stand	D3	2(S-12)	---
		Holder
		LCD Main
		CBA Unit &	D4
	[11]	Liquid		13(S-13), *CN106	---
			D6
		Crystal
		Panel Unit
	[12]	Function	D4	5(S-14)	---
		CBA
	[13]	IR Sensor	D4	(S-15)	---
		CBA
	[14]	Speaker(s)	D4	4(S-16), Speaker	---
				Holder (s)
	[15]	Front	D4	---------------	---
		Cabinet
	[16]	Stand	D5	6(S-17)	---
		Cover
	[17]	Arm Holder	D5	2(S-18)	---
	[18]	Sheet L, R	D5	---------------	---
	[19]	Arm	D5	---------------	---
		Assembly
	↓	↓	↓	↓	↓
	(1)	(2)	(3)	(4)	(5)

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

		(S-2)
		(S-2)
		(S-3)
	[2] Rear Cabinet	(S-2)
		(S-3)
		(S-1)
		(S-2)
	[1] Tilt Stand
	Assembly
		Fig. D1

5-3

L4670DC

[6] DVD Holder (L)

[5] DVD Mechanism

	(S-5)	(S-8)
		(S-9)
	(S-4)	(S-7)
		[7] DVD Holder (R)
		(S-7)
	(S-5)	A
		(S-7)

[3] Jack Holder

(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

Screws A

Pin A

Either of two places

A

FPC Cable View for A

Hole A

Main Chassis

Fig. D2

5-4

L4670DC

(S-10)

(S-11)

[8] Inverter CBA

(S-11)

(S-10)

(S-12)

[10]Tilt Stand Holder

(S-11)

[9] Main CBA

Fig. D3

[15] Front Cabinet
	(S-14)
	[12] Function CBA
	(S-14)
	(S-14)
	Speaker Holders
	(S-16)	(S-13)
	[14] Speaker
	[13] IR Sensor CBA
[14] Speaker	(S-15)
	(S-13)
	(S-13)
		(S-13)
(S-16)
Speaker Holders	[11] LCD Main CBA Unit &
	Liquid Crystal Panel Unit
	(S-13)
		Fig. D4
	5-5	L4670DC

[16] Stand Cover

[17] Arm Holder

(S-18) [18] Sheet R

[19] Arm

Assembly

(S-17)

(S-17)

[18] Sheet L

Fig. D5

5-6

L4670DC

TV Cable Wiring Diagram

To DVD Mechanism
DVD Main
CBA Unit
CN201 CN301				Function CBA
				CLN904
	CN801
CN601
	CN401
		To Liquid Crystal
LCD Main		Panel Unit
CBA Unit
	CN311		CN312	CN106		Inverter CBA
	CN1751			Main CBA
	CN1761
	CN103B		CN102B	CN101B
						CN301
	CN103A		CN102A	CN101A	CN404	CN304
							To
CN1701							Liquid
						CN302	Crystal
							Panel
							Unit
			CN1651
						CN303
CN801	CN53					CN310
To Speaker			IR Sensor CBA			To Speaker
			CLN53
							Fig. D6

5-7

L4670DC

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note:

“CBA” is abbreviation for “Circuit Board Assembly.”

NOTE:

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

Test Equipment Required

1.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	DATA
	ITEM	(on the remote
			VALUE
		control)
	BRT(PAL)		130
	CNT(PAL)		140
		MENU → 1
	CLR-R(PAL)		70
	CLR-B(PAL)		70
	SHR(PAL)		143
	S-BRT(PAL)		133
	S-CNT(PAL)		140
		MENU → 2
	S-CLR-R(PAL)		70
	S-CLR-B(PAL)		70
	S-SHR(PAL)		143
	C-BRT(PAL)		128
	C-CNT(PAL)		128
		MENU → 3
	C-CLR-R(PAL)		120
	C-CLR-B(PAL)		120
	C-SHR(PAL)		143
	BRT(SECAM)		130
	CNT(SECAM)		140
		MENU → 4
	CLR-R(SECAM)		70
	CLR-B(SECAM)		70
	SHR(SECAM)		143
	S-BRT(SECAM)		133
	S-CNT(SECAM)		140
		MENU → 5
	S-CLR-R(SECAM)		70
	S-CLR-B(SECAM)		70
	S-SHR(SECAM)		143
	C-BRT(SECAM)		128
	C-CNT(SECAM)		128
		MENU → 6
	C-CLR-R(SECAM)		120
	C-CLR-B(SECAM)		120
	C-SHR(SECAM)		143
	BRT(NTSC)		128
	CNT(NTSC)		138
	CLR-R(NTSC)	MENU → 7	77
	CLR-B(NTSC)		77
	TNT(NTSC)		120
	SHR(NTSC)		143
	S-BRT(NTSC)		128
	S-CNT(NTSC)		138
	S-CLR-R(NTSC)	MENU → 8	74
	S-CLR-B(NTSC)		74
	S-TNT(NTSC)		120
	S-SHR(NTSC)		143

6-1

L4670EA

		BUTTON	DATA
	ITEM	(on the remote
			VALUE
		control)
	C-BRT(NTSC)		128
	C-CNT(NTSC)		128
	C-CLR-R(NTSC)	MENU → 9	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 → 7	0
	SBB(C/D/S-1)	VOL. p → 9	0
	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 → 7	0
	C-SBB(C/D/S-2)	VOL. p → 9	0
	7F		FF
	LAST POWER		OFF
	SYSTEM	VOL. p	*1
	NCM		ON
	ASPECT		OFF
	RUSSIAN		OFF

*1 PAL-BG (LDD-A2006), PAL-I (LDD-B2006), SECAM-L (LDD-C2006), PAL-BG/DK (LDD-D2006)

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.

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
		VOL. p	[RF/AV2(CVBS)]	White Purity
	Screen		C/D/S-1	(APL 80%)
		buttons	[AV1(RGB)]	or
			C/D/S-2	(APL 40%)
	M. EQ.		Spec.
	Pattern Generator,		x: 285 to 295,
	Color analyzer		y: 295 to 305

Figure

It carries out in a darkroom.

Perpendicularity

L = 3 cm
INPUT: WHITE 80%	Color Analyzer

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.”

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 “C- COR(C/D/S-2)” for Red adjustment.When “x” value and “y” value are not within specification, adjust “C-COB(C/D/S-2)” or “C-COR(C/D/S-2)”. Refer to “1. Initial Setting.”

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

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 : *

EEPROM CLEAR : CLEAR EXIT: SELECT

Fig. g

2.Press [CLEAR] button on the remote control unit. Fig. h appears on the screen.

"*******" differs depending on the models.

MODEL : *******

Version : *.**

Region : *

< 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

EEPROM CLEAR : CLEAR EXIT: SELECT

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