Panasonic TH-42a410t Bedienungsanleitung

ORDER NO. MTV1401167CE

LED TV

Model No. TH-42A410T

Chassis: KM25

Destination: THAILAND

TABLE OF CONTENTS

PAGE PAGE

1 Safety Precautions----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3

1.1.1. Leakage Current Cold Check---------------------- 3

1.1.2. Leakage Current Hot Check (See Figure

1.) --------------------------------------------------------- 3

2 Warning -------------------------------------------------------------- 4

2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostatically Sensitive (ES) Devices---------- 4

2.2. About lead free solder (PbF)---------------------------- 5

3 Service Navigation ----------------------------------------------- 6

3.1. Service Hint ------------------------------------------------- 6

4 Specifications ----------------------------------------------------- 7

5 Service Mode ------------------------------------------------------ 8

5.1. How to enter into Service Mode ----------------------- 8

5.1.1. Purpose ------------------------------------------------- 8

5.1.2. Key command ----------------------------------------- 8

5.1.3. How to exit---------------------------------------------- 8

5.1.4. Contents of adjustment mode --------------------- 8

5.1.5. Display of SOS History ------------------------------ 9

5.1.6. Exit-------------------------------------------------------- 9

5.1.7. Hotel Mode----------------------------------------------9

6 Troubleshooting Guide --------------------------------------- 10

6.1. Check of the IIC bus lines------------------------------ 10

6.1.1. How to access --------------------------------------- 10

6.1.2. Self-check indication only ------------------------- 10

6.1.3. Self-check indication and forced to factory

shipment setting ------------------------------------- 10

6.1.4. Exit ------------------------------------------------------ 10

6.1.5. Screen display --------------------------------------- 10

6.2. Power LED Blinking timing chart --------------------- 11

6.3. Method of detecting SOS ------------------------------ 11

6.4. LCD Panel test mode ----------------------------------- 12

6.5. No Power--------------------------------------------------- 12

7 Disassembly and Assembly Instructions--------------- 13

7.1. Speaker Fixing and Assembly ----------------------- 13

7.2. LCD Panel Fixing & Handling Method -------------- 14

7.3. Metal MTG Fixing --------------------------------------- 15

7.4. Key Button Assembly ----------------------------------- 16

7.5. Pedestal Assembly -------------------------------------- 17

7.6. Back Cover - Label & Screw -------------------------- 18

TH-42A410T

8 Measurements and Adjustments -------------------------- 19

8.1. Voltage chart of A-board-------------------------------- 19

8.2. Voltage chart of P-board-------------------------------- 19

9 Block Diagram --------------------------------------------------- 20

9.1. Main Block Diagram ------------------------------------- 20

10 Wiring Connection Diagram --------------------------------- 21

10.1. Wire Dressing 1------------------------------------------- 21

10.2. Wire Dressing 2------------------------------------------- 22

11 Schematic Diagram--------------------------------------------- 23

12 Printed Circuit Board ------------------------------------------ 41

13 Exploded View and Replacement Parts List ----------- 48

TH-42A410T

1 Safety Precautions

1.1. General Guidelines

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or

damaged by the short circuit.

2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly

installed.

3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

4. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.

5. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the

wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.

6. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight

out.

1.1.1. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the

two prongs on the plug.

2. Measure the resistance value, with an ohmmeter,

between the jumpered AC plug and each exposed

metallic cabinet part on the equipment such as

screwheads, connectors, control shafts, etc. When the

exposed metallic part has a return path to the chassis, the

reading should be 100 Mohm and over.

When the exposed metal does not have a return path to

the chassis, the reading must be .

1.1.2. Leakage Current Hot Check (See

Figure 1.)

1. Plug the AC cord directly into the AC outlet. Do not use

an isolation transformer for this check.

2. Connect a 1.5kohm, 10 watts resistor, in parallel with a

0.15F capacitors, between each exposed metallic part

on the set and a good earth ground such as a water pipe,

as shown in Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more

sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the

voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of

the above measurements.

6. The potential at any point should not exceed 0.75 volts

RMS. A leakage current tester (Simpson Model 229 or

equivalent) may be used to make the hot checks, leakage

current must not exceed 1/2 milliamp. In case a

measurement is outside of the limits specified, there is a

possibility of a shock hazard, and the equipment should

be repaired and rechecked before it is returned to the

customer.

Figure 1

TH-42A410T

2Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically

Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called

Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and

semiconductor [chip] components. The following techniques should be used to help reduce the incidence of component damage

caused by electrostatic discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your

body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,

which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as

aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can

generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most

replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or

comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material

to the chassis or circuit assembly into which the device will be installed.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the

brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)

sufficient to damage an ES device).

TH-42A410T

2.2. About lead free solder (PbF)

Note: Lead is listed as (Pb) in the periodic table of elements.

In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.

The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).

That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.

This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d

suggest the use of Pb free solder as well, although Pb solder may be used.

PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB.

Caution

• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please

use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).

• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).

If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb

solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.

• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the

opposite side. (see figure below)

TH-42A410T

3 Service Navigation

3.1. Service Hint

Board Name Main Device Remarks

A BOARD TUN, EEP, SPI, MTK IC Repairable

P BOARD Power Supply, Power switch, Keyscan Repairable

K BOARD Remote, LED,Luminence Sensor Repairable

GK BOARD Power Switch, Keyscan Repairable

LD BOARD LED driver Repairable

TH-42A410T

4 Specifications

Note

• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.

Power source AC 220 - 240 V, 50/60 Hz

Power consumption

(Rated power) 89 W

Display panel

Panel LCD panel (LED backlight)

Visible screen size (diagonal) 106 cm

Display resolution 1,920 (W) 1,080 (H)

Dimensions (W H D)

963 mm 610 mm 247 mm (With Pedestal)

963 mm 566 mm 69 mm (TV only)

Mass 10.0 (With Pedestal)

8.5 (TV only)

Connection terminals

AV IN (COMPONENT / VIDEO) VIDEO RCA PIN Type 1, 1.0 V[p-p] (75 )

AUDIO L - R RCA PIN Type 2, 0.5 V[rms]

Y1.0 V[p-p] (including synchronisation)

PB, PR±0.35 V[p-p]

HDMI 1 / 2 input TYPE A Connectors

USB USB 2.0 TYPE A Connectors

DC 5 V, Max. 500 mA

DIGITAL AUDIO OUT PCM / Dolby Digital / DTS, Fibre optic

Sound

Audio output 20 W (10 W + 10 W)

Receiving systems / Band name 17 SYSTEMS FUNCTION

1 PAL B, G, H

Reception of broadcast transmissions and

Playback from Video Cassette Tape Recorders

2PALI

3PALD,K

4 SECAM B, G

5SECAMD,K

6 SECAM K1

NTSC M (NTSC 3.58 / 4.5 MHz)

8 NTSC 4.43 / 5.5 MHz

Playback from Special VCR’s or DVD

9 NTSC 4.43 / 6.0 MHz

10 NTSC 4.43 / 6.5 MHz

11 NTSC 3.58 / 5.5 MHz

12 NTSC 3.58 / 6.0 MHz

13 NTSC 3.58 / 6.5 MHz

14 SECAM I

15 PAL 60 Hz / 5.5 MHz Playback from Special Disc Players and

Special VCR’s or DVD

16 PAL 60 Hz / 6.0 MHz

17 PAL 60 Hz / 6.5 MHz

Digital TV 7 MHz VHF / 8 MHz UHF free-to-air TV broadcast reception

Receiving channels (Analogue TV)

VHF BAND 2 - 12 (PAL / SECAM B, K1)

0 - 12 (PAL B AUST.)

1 - 9 (PAL B N.Z.)

1 - 12 (PAL / SECAM D)

1 - 12 (NTSC M Japan)

2 - 13 (NTSC M USA)

UHF BAND 21 - 69 (PAL G, H, I / SECAM G, K, K1)

28 - 69 (PAL B AUST.)

13 - 57 (PAL D, K)

13 - 62 (NTSC M Japan)

14 - 69 (NTSC M USA)

CATV S1 - S20 (OSCAR)

1 - 125 (USA CATV)

C13 - C49 (JAPAN)

S21 - S41 (HYPER)

Z1 - Z37 (CHINA)

5A, 9A (AUST.)

Aerial input VHF / UHF

Operating conditions Temperature : 0°C - 40°C

Humidity : 20 % - 80 % RH (non-condensing)

TH-42A410T

5 Service Mode

5.1. How to enter into Service Mode

5.1.1. Purpose

After exchange parts, check and adjust the contents of adjustment mode.

While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.

5.1.2. Key command

[1] button...Main items Selection in forward direction

[2] button...Main items Selection in reverse direction

[3] button...Sub items Selection in forward direction

[4] button...Sub items Selection in reverse direction

[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

5.1.3. How to exit

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

5.1.4. Contents of adjustment mode

• Value is shown as a hexadecimal number.

• Preset value differs depending on models.

• After entering the adjustment mode, take note of the value in each item before starting adjustment.

Main item Sub item Sample Data

ADJUST H POS

H AMP

V POS

V AMP

V COM

WB-ADJ R-GAIN 8D

G-GAIN AE

B-GAIN FF

R-CENT 6C

G-RENT 80

B-CENT A0

OPTION Boot upgrade NO

STBY-SET 00

EMERGENCY ON

CLK MODE 00

CLOCK FC7

Y/C DELAY DYNAMIC

OPT 1 00000000

OPT 2 11100110

OPT 3 00001001

OPT 4 00000000

EDID-CLK HIGH

TH-42A410T

5.1.5. Display of SOS History

SOS History (Number of LED blinking) indication.

From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.

This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory

shipment setting].

5.1.6. Exit

1. Disconnect the AC cord from wall outlet.

5.1.7. Hotel Mode

1. Purpose

Restrict a function for hotels.

2. Access command to the Hotel mode setup menu.

In order to display the Hotel mode setup menu:

While pressing [VOLUME (-)] button of the main unit,

press [AV] button of the remote control three times within

2 seconds.

Then, the Hotel mode setup menu is displayed.

3. To exit the Hotel mode setup menu

Disconnect AC power cord from wall outlet.

4. Explain the Hotel mode setup menu

Item Function

Hotel Mode Select hotel mode On/Off

Initial INPUT Select input signal modes.

Set the input, when each time power is switched on.

Selection :

Off,Analogue,DVB-C,DVB-T,AV1,AV2,HDMI1,

HDMI2

• Off: give priority to a last memory. However, Euro

model is compulsorily set to TV.

Initial POS Select programme number.

Selection :

Off/0 to 99

• Off: give priority to a last memory.

Initial VOL LEVEL Adjust the volume when each time power is switched

on.

Selection Range :

Off/0 to 100

• Off: give priority to a last memory.

Maximum Vol Level Adjust maximum volume.

Range :

0 to 100

Button Lock Select local key conditions.

Selection :

Off/SETUP/MENU/ALL

• OFF: altogether valid

• SETUP: only F-key is invalid

(Tuning guide (menu) can not be selected.)

• MENU: only F-key is invalid

(only Volume/Mute can be selected.)

• ALL: altogether invalid.

Remote Lock Select remote control key conditions.

Selection :

Off/SETUP/MENU

• OFF: altogether valid.

• SETUP: only Setup menu is invalid.

• MENU: Picture/Sound/Setup menu are invalid.

Hotel Mode USB Basically after user already setup the hotel mode

according to their criteria, what they need to do is

• insert USB (while in hotel mode)

• choose ‘Copy TV to USB’ to copy the setting into

the USB (a file will be created to store the hotel

mode setting in the USB)

• switch ‘OFF’ the unit

• pull out USB from unit

To copy the hotel mode setting from USB.

• enter hotel mode

•insertUSB

• choose ‘Copy USB to TV’

• follow instruction as shown on the units

• once finish, switch ‘OFF; the unit

• pull out USB from unit

Private Information Select private information for VIERA Cast is Keep or

Reset if Hotel mode is set to [On] when TV power on

Selection :

Keep/Reset

• Keep: private information for VIERA Cast is keep

• Reset: private information for VIERA Cast is

reset

TH-42A410T

6 Troubleshooting Guide

Use the self-check function to test the unit.

1. Checking the IIC bus lines

2. Power LED Blinking timing

6.1. Check of the IIC bus lines

6.1.1. How to access

6.1.2. Self-check indication only

Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control

for more than 3 seconds.

6.1.3. Self-check indication and forced to factory shipment setting

Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote

control for more than 3 seconds.

6.1.4. Exit

Disconnect the AC cord from wall outlet.

6.1.5. Screen display

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