Funai 24FL553P/10 Schematic

SERVICE MANUAL

Serial No. Label

MANUFACTURED:MAY2013PP10210001‒A33L1EP

※

"A33L1EP" "A33L0EP"

Serial No. Label

24˝ COLOR LCD TELEVISION

24FL553P/10 24FL553/10

– EXTERNAL VOLUME –

This Service Manual is for the 24FL553P/10 (A33L1EP) and 24FL553/10 (A33L0EP) models. For the 24FL553P/10 (A33L1EP) and 24FL553/10 (A33L0EP) models, the letter (A33L1EP or A33L0EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below.

MANUFACTURED:MAY2013PP10210001‒A33L0EP

※

24˝ COLOR LCD TELEVISION

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.

24FL553P/10

24FL553/10

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

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

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

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

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

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

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

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

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

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

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

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

Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

SPECIFICATIONS

< TUNER >

VHS/UHF Input ----------- 75 unbal., IEC Connector Center IF ------------------- SECAM-L 38.9MHz, SECAM-L’ 33.9MHz

Description Condition Unit Nominal Limit

1. Video S/N 80 dB --- 40

2. Audio S/N --- dB --- 40/40

< LCD PANEL >

Description Condition Unit Nominal Limit

1. Number of Pixels

2. Viewing Angle

<DVB-T>

Description Condition Unit Nominal Limit

RECEIVED FREQ.RANGE (-60dBm, 45ch.) *1, *2

2. INPUT DYNAMIC RANGE (mix./max)

3. C/N PERFORMANCE

(-50dBm)

4. MULTIPATH (-50dBm)

a. Performance with

short delay echoes

b. Performance with

long delay echoes

Horizontal

Ver t i cal

Horizontal

Ver t i cal

1):*1 VHF HIGH 8ch. UHF 45ch.

2):*2 VHF HIGH 8ch. UHF 45ch.

1):*1 VHF HIGH 8ch. UHF 45ch.

2):*2 VHF HIGH 8ch. UHF 45ch.

UHF 45ch.

1):*3

2):*4

1):*3

2):*4

pixels pixels

kHz kHz

dBuV dBuV

dB dB

dB dB dB dB

1366

768

° °

-85 to 85

-80 to 80

1000

900

25/101 25/101

18/101 18/101

15 15

11 11

18.7

14.0

19.1

13.0

---

-75 to 75

-70 to 70

500 167

28/98 29/98

21/98 21/98

≦18 ≦18

≦14 ≦14

≦23 ≦20 ≦23 ≦18

*1: modulation parameters = [8k 64QAM CR=2/3 GI=1/32] *2: modulation parameters = [8k 16QAM CR=3/4 GI=1/8] *3: modulation parameters = [2k 64QAM CR=2/3 GI=1/32] *4: modulation parameters = [2k 16QAM CR=3/4 GI=1/32]

< VIDEO >

Description Condition Unit Nominal Limit

1. Over Scan

2. Color Temperature

3. Resolution

4. Brightness

AT 100% WHITE FIELD

Horizontal

Ver t i cal

AT 70% WHITE FIELD

x y

Horizontal

Ver t i cal

(AT RETAIL MODE)

1-1 A33L0_L1 SP

% %

°K 12000

0.272

0.278

line line

cd/m

5 5

400 350

250 ---

---

--±0.015 ±0.015

---

< AUDIO >

All items are measured across 8  load at speaker output terminal.

Description Condition Unit Nominal Limit

1. Audio Output Power

2. Audio Distortion 500mW: Lch/Rch % 1.5/1.5 3.0/3.0

3. Audio Freq. Response

4. Audio S/N Lch/Rch dB ---

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.

2V rms input Lch/Rch

Vol:MAX

6dB: Lch

6dB: Rch

W8/87/7

Hz Hz

---

≧45/45

1-2 A33L0_L1 SP

IMPORTANT SAFETY PRECAUTIONS

ALSO TEST WITH PLUG REVERSED USING AC ADAPTER PLUG AS REQUIRED

TEST ALL EXPOSED METAL SURFACES

READING SHOULD NOT BE ABOVE 0.5 mA

EARTH GROUND

DEVICE

LEAKAGE

CURRENT

TESTER

BEING

TESTED

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

Safety Precautions for LCD TV Circuit

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

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

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

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

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

b. Be sure that there are no cabinet openings

through which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, (1) spacing between the 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.

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

2-1 LTVP_ISP

and/or video output connections, might alter the safety characteristics of this receiver and create a hazard to the user. Any design alterations or additions will void the manufacturer's warranty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.

4. Hot Chassis Warning -

a. Some TV receiver chassis are electrically

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

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

b. Some TV receiver chassis normally have 85V

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

c. Some TV receiver chassis have a secondary

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

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

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

7. Product Safety Notice - Some electrical and

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

2-2 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. When connecting or disconnecting the internal

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

L. When installing parts or assembling the cabinet

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

2-3 LTVP_ISP

Safety Check after Servicing

Fig. 1

Chassis or Secondary Conductor

Primary Circuit

d' d

Fig. 2

AC Voltmeter (High Impedance)

Exposed Accessible Part

One side of Power Cord Plug Prongs

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’)

220 to 240 V

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

3mm(d)

8mm(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.).

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)

One side of power cord plug

prongs (B) to:

2kRES.

Connected in

220 to 240 V

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

parallel

50k RES.

Connected in

parallel

i0.7mA AC Peak

i2mA DC

i0.7mA AC Peak

i2mA DC

2-4 LTVP_ISP

Antenna terminals

A/V Input, Output

RF or

STANDARD NOTES FOR SERVICING

Top View

Out

Bottom View

Input

Pin 1

Fig. S-1-1

Circuit Board Indications

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

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

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

Pb (Lead) Free Solder

Pb free mark will be found on PCBs which use Pb free solder. (Refer to figure.) For PCBs with Pb free mark, be sure to use Pb free solder. For PCBs without Pb free mark, use standard solder.

Pb free mark

How to Remove / Install Flat Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:

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

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

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

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

CAUTION:

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

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

3. 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:

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

Fine Tip Soldering Iron

Sharp Pin

Fig. S-1-4

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

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

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.

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

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

Example :

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

Fig. S-1-7

Presolder

CBA

Flat Pack-IC

Fig. S-1-8

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

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

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

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 M) 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 M) 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.

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

3-3 TVP_SN

CABINET DISASSEMBLY INSTRUCTIONS

[1] Stand

Assembly

[2] Rear Cover

[3] Power Supply CBA

[5] Speaker

[6] LCD Panel

Assembly

[7] Front Cabinet

[4] Digital Main CBA Unit

[8] Function CBA Unit

1. Disassembly Flowchart

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

2. Disassembly Method

Step/

Loc.

Part

No.

Stand

[1]

Assembly

[2] Rear Cover D1 8(S-2), 3(S-3) 1

Fig.

No.

Removal Note

D1 3(S-1) ---

Note:

(1) Order of steps in procedure. When reassembling,

follow the steps in reverse order. These numbers are also used as the Identification (location) No. of parts in figures.

(2) Parts to be removed or installed.

(3) Fig. No. showing procedure of part location

(4) Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or desoldered. P = Spring, L = Locking Tab, S = Screw, H = Hex Screw, CN = Connector e.g. 2(S-2) = two Screws of (S-2), 2(L-2) = two Locking Tabs of (L-2)

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

Ta bl e ."

Important precautions concerning the LCD Panel Assembly:

1. When you disassemble/re-assemble the Rear Cover

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

much force, the hooks may be damaged.

• When assembling, be careful not to damage the

X-PCB Board or the COF(Chip On Film).

• Make sure the hooks are securely in place when

re-assembling.

[3]

[4]

[5] Speaker D3 --------------- ---

[6]

[7]

[8]

(1)

Power Supply CBA

Digital Main CBA UnitD2D5

LCD Panel Assembly

Front Cabinet

Function CBA Unit



(2)

4(S-4), CN101,

CN102, CN103,

CN104, CN1001

4(S-5), CN7, CN12, CN18, Jack Holder

---

D3 --------------- ---

D4 4(S-6) 2

Sensor Lens, Shield

Plate, Control Plate



(3)



(4)

(5)

2. When you disassemble/re-assemble the Front Cabinet or Function CBA Unit

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

much force, the hooks may be damaged.

• When disassembling, first detach the hooks on each

end on the bottom side, then detach the remaining hooks moving toward the center.

• Make sure the hooks are securely in place when

assembling.

• Be careful not to scratch the display panel when

assembling.

• The Function CBA Unit and Sensor Lens are fixed in

place by the hooks. Make sure these hooks are not



damaged. Make sure the Function CBA Unit and Sensor Lens are securely in place when re-assembling.

• The screw tightening torque must be 6kgf·cm

(5.2lb·in).

• After replacing the Front Cabinet or Function CBA

Unit, make sure the tact switches operate normally.

• Make sure to replace the Control Plate to a new one

when replacing the Front Cabinet.

4-1 A33L1_L0 DC

(S-1)

[1] Stand Assembly

(S-3)

(S-2)

[2] Rear Cover

Hook

Fig. D1

: Make sure to read all the precautions on page 4-1 when you disassemble/re-assemble the Rear

Cover.

4-2 A33L1_L0 DC

+ 29 hidden pages

Funai 24FL553P/10 Schematic

TABLE OF CONTENTS

SPECIFICATIONS

IMPORTANT SAFETY PRECAUTIONS

STANDARD NOTES FOR SERVICING

CABINET DISASSEMBLY INSTRUCTIONS