Panasonic TC-L37DT30 Service manual

ORDER NO.MTNC110321CE

B32 Canada: B61

37 inch Class 1080p LCD HDTV

Model No. TC-L37DT30

LA24 Chassis

TABLE OF CONTENTS

PAGE PAGE

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

1.1. General Guidelines ----------------------------------------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. PCB Layout--------------------------------------------------6

3.2. Applicable signals------------------------------------------6

4 Specifications------------------------------------------------------7 5 Technical Descriptions------------------------------------------9

5.1. Specification of KEY for DTCP-IP, WMDRM and Widevine------------------------------------------------9

6 Service Mode-----------------------------------------------------10

6.1. How to enter into Service Mode----------------------10

6.2. SRV-TOOL------------------------------------------------- 11

6.3. Hotel mode-------------------------------------------------12

6.4. Data Copy by SD Card ---------------------------------13

7 Troubleshooting Guide---------------------------------------- 16

7.1. Check of the IIC bus lines------------------------------16

7.2. Power LED Blinking timing chart-------------- -------17

7.3. LCD Panel test mode -----------------------------------17

8 Disassembly and Assembly Instructions---------------18

8.1. Pedestal ----------------------------------------------------18

8.2. Rear cover ------------------------------------------------- 1 8

8.3. AC cord-----------------------------------------------------18

8.4. Control panel assy--------------------------------------- 18

8.5. P-Board-----------------------------------------------------19

8.6. Side AV bracket-------------------------------------------19

8.7. A-Board-----------------------------------------------------19

8.8. Cover bottom----------------------------------------------19

8.9. Speaker box-----------------------------------------------20

8.10. Metal bracket bottom------------------------------------20

8.11. LCD Panel -------------------------------------------------20

8.12. KA-Board, S-Board and V-Board--------------------- 20

8.13. EMI processing -------------------------------------------21

9 Measurements and Adjustments --------------------------28

9.1. Voltage chart of A-board--------------------------------28

9.2. Picture level adjustment (RF) -------------------------28

10 Block Diagram ---------------------------------------------------29

10.1. Main Block Diagram--------------- ----------------------29

10.2. Block (1/2) Diagram -------------------------------------30

10.3. Block (2/2) Diagram -------------------------------------31

11 Wiring Connection Diagram--------------------------------- 33

11.1. Caution statement.---------------------------------------33

11.2. Wiring 1-----------------------------------------------------33

11.3. Wiring 2-----------------------------------------------------34

12 Schematic Diagram 13 Printed Circuit Board 14 Exploded View

1 Safety Precautions

1.1. General Guidelines

1. When servicing, observe the original lead dress. If a shor t 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 shield s 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 Fasten connectors but plug t hem straight in or unplug them straight out.

1.1.1. Leakage Current Cold Check

1. Unplu g 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

0.15μF 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

2 Warning

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 electrica l assembly equ ipped with ES devices, plac e the assembly on a cond uctive su rface 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).

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 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 (37 0 ± 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)

Suggested Pb free solder

There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

's manufacture due to environmental conservation issues. For service and repair work, we'd

3 Service Navigation

3.1. PCB Layout

Board Name Function A-Board Main KA-Board Remote Receiver, LED, Cat's eye P-Board Power supply

S-Board Power switch V-Board 3D IR

Non serviceable P-Board should be exchanged for service.

3.2. Applicable signals

* Mark: Applicable input signal for Component (Y, PB, PR), HDMI and PC

horizontal frequency (kHz) vertical frequency (Hz) COMPONENT HDMI PC 525 (480) / 60i 15.73 59.94 * * 525 (480) /60p 31.47 59.94 * * 750 (720) /60p 45.00 59.94 * * 1,125 (1,080) /60i 33.75 59.94 * * 1,125 (1,080) /60p 67.43 59.94 * 1,125 (1,080) /60p 67.50 60.00 * 1,125 (1,080) /24p 26.97 23.98 * 1,125 (1,080) /24p 27.00 24.00 * 640 × 400 @70 31.47 70.08 * 640 × 480 @60 31.47 59.94 * Macintosh13 inch (640 × 480) 35.00 66.67 * 640 × 480 @75 37.50 75.00 * 852 × 480 @60 31.44 59.89 * 800 × 600 @60 37.88 60.32 * 800 × 600 @75 46.88 75.00 * 800 × 600 @85 53.67 85.08 * Macintosh16 inch (832 × 624) 49.73 74.55 * 1,024 × 768 @60 48.36 60.00 * 1,024 × 768 @70 56.48 70.07 * 1,024 × 768 @75 60.02 75.03 * 1,024 × 768 @85 68.68 85.00 * Macintosh 21 inch (1,152 ×870) 68.68 75.06 * 1,280 × 768 @60 47.78 59.87 * 1,280 × 1,024 @60 63.98 60.02 * 1,366 × 768 @60 48.39 60.04 *

Note

• Signals other than above may not be displayed properly.

• The above signals are reformatted for optimal viewing on your display.

• Computer signals which can be input are those with a horizontal scanning frequency of 15 to 110 kHz and vertical scanning frequency of 48 to 120 Hz. (However, the image will not be displayed properly if the signals exceed 1,200 lines.)

4 Specifications

Power Source AC 110-127 V, 60 Hz Power Consumption

Rated Power Consumption 129 W Standby Condition 0.2 W

Display panel

Aspect Ratio 16:9 Visible screen size 37 inch class (37.0 inches measured diagonally) (W × H × Diagonal) 32.2 inch × 18.1 inch × 37.0 inch (819 mm × 460 mm × 940 mm) (No. of pixels) 2,073,600 (1,920 (W) × 1,080 (H)) [5,760 × 1,080 dots]

Sound

Speaker 1-way 2 bottom SP System Audio Output 20 W [10 W + 10 W] ( 10 % THD )

PC signals VGA, SVGA, XGA, WXGA, SXGA

Channel CapabilityATSC/NTSC (Digital/Analog) Operating Conditions Temperature: 32 °F - 95 °F (0 °C - 35°C)

Connection Terminals

VIDEO IN VIDEO: RCA PIN Type × 1 1.0 V [p-p] (75 Ω)

COMPONENT IN Y: 1.0 V [p-p] (including synchronization)

HDMI 1-4 TYPE A Connector × 4.

USB 1-3 USB 2.0 Type A connector x 3 (DC 5 V MAX500mA) LAN (for VIERA connect) RJ45 (10BASE-T/100BASE-TX) PC D-SUB 15PIN: R,G,B / 0.7 V [p-p] (75 Ω)

Card slot SD CARD slot × 1 DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber Optic

FEATURES 3D Y/C FILTER, CLOSED CAPTION,

Dimensions (W × H × D)

Including TV stand 34.5 inch × 20.6 inch × 10.3 inch (874 mm × 522 mm × 260 mm) TV Set only 34.5 inch × 21.2 inch × 0.8 inch (1.3 inch, 2.9 inch) (874 mm × 536 mm × 19 mm (33 mm, 72 mm))

Mass

Including TV stand 34.2 lb. (15.5 kg) NET TV Set only 27.6 lb. (12.5 kg) NET

Horizontal scanning frequency 31 - 69 kHz Vertical scanning frequency 59 - 86 Hz VHF/ UHF: 2 - 69, CATV: 1 - 135

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

AUDIO L - R: RCA PIN Type × 2 0.5 V [rms]

, PR: ±0.35 V [p-p]

AUDIO L-R: RCA PIN Type × 2 0.5 V [rms]

• This TV supports [HDAVI Control 5] function.

HD, VD / 1.0 - 5.0 V [p-p] (high impedance)

V-Chip, VIERA connect 3D IMAGE VIEWER, Media player, HDAVI Control 5

Note

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

Q 3D Eyewear

Lens type Liquid Crystal Shutter Usage temperature range 32 °F - 104 °F (0 °C - 40 °C) Charging power supply DC 5 V (supplied by USB terminal of a Panasonic TV) Battery Lithium-ion polymer rechargeable battery

DC 3.7 V, 70 mAh Operation time*

Viewing range*

Materials Main body: Resin

Dimensions Width 6.70 inch (170.1 mm) (not including nose pad part) Height 1.63 inch (41.2 mm)

Mass Approx. 0.09 lb. (Approx. 39 g)

Charging time* Transmitter for 3D Eyewear

Within 10 feet 5 inch (3.2 m) from front surface (Within ± 35° horizontal, ± 20° vertical)

Lens section: Liquid crystal glass

Overall length 6.69 inch (169.8 mm)

: Approx. 30 hours

: Approx. 2 hours

*1 Operation time/charging time

• The battery deteriorates after repeated use, and th e operation time eventua lly becomes short. The figur es above are at shipping fro m the factory, and are not a guarantee of performance.

*2 Viewing range

• The location of the 3D Eyewear transmitter.

• There are differences in the viewing range of the 3D Eyewear among individuals.

• The 3D Eyewear may not operate correctly at the outside of the viewing range.

Q Wireless LAN Adaptor

Power supply DC 5 V (USB powered) 500 mA Antenna Tx 1, Rx 2 Interface USB 2.0 Standard Compliance IEEE802.11n / IEEE802.11a / IEEE802.11g / IEEE802.11b Transmission system MISO-OFDM system, OFDM system, DSSS system Frequency Range IEEE802.11n / IEEE802.11a:

5.150 GHz - 5.725 GHz for EU Countries

5.150 GHz - 5.850 GHz for USA, Canada

5.250 GHz - 5.850 GHz for Taiwan IEEE802.11g / IEEE802.11b / IEEE802.11n:

2.412 GHz - 2.472 GHz for EU countries

2.412 GHz - 2.462 GHz USA, Canada, Taiwan

Transfer rate (standard)* IEEE802.11n: Tx Max. 150 Mbps, Rx Max. 300 Mbps

IEEE802.11g / IEEE802.11a: Max. 54 Mbps IEEE802.11b: Max. 11 Mbps

Access Mode Infrastructure mode Security WPA2-PSK (TKIP/AES)

WPA-PSK (TKIP/AES) WEP (64 bit / 128 bit)

Dimensions (W × H × D) 1.18 inch × 0.42 inch × 3.73 inch (30.00mm × 10.72 mm × 94.85 mm) Mass 0.88 oz (25g) Net

*Transfer rates are theoretical values; however, actual communication rate will vary according to communication environment or connected equipment.

5 Technical Descriptions

5.1. Specification of KEY for DTCP-IP, WMDRM and Widevine

5.1.1. General information:

1. EEPROM (IC890 2) for spare parts has the seed of KEY for each DTCP-IP for DLNA, WMDRM for Netflix and Widevine for CinemaNow.

2. The final KEY data will be generated by Peaks IC (IC8000) when SELF CHECK was done and are stored in both Peaks IC (IC8000) and EEPROM (IC8902).

5.1.2. Replacement of ICs:

When Peaks IC is replaced, EEPROM should be also replaced with new one the same time. When EEPROM is replaced, Peaks IC is not necessary to be replaced the same time. After the replacement of IC, SELF CHECK should be done to generate the final KEY data. How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds. TV will be forced to the factory shipment setting after this SELF CHECK.

6 Service Mode

6.1. How to enter into Service Mode

6.1.1. 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.

Note:

Service Mode can not be entered when 3D signal input. Input 2D signal to enter Service Mode.

6.1.2. 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 ( - )

6.1.3. How to exit

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

6.1.4. 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 Remark

ADJUST CONTRAST 000

COLOR 56 TINT 00 SUB-BRT 800 BACKLGT 086 B-Y-G 40 R-Y-A 00 V COM 18D

WB-ADJ R-GAIN 80

G-GAIN 6B B-GAIN 5D R-CENT 84 G-CENT 80 B-CENT 8F

OPTION Boot ROM Factory Preset.

STBY-SET 00 EMERGENCY OFF CLK MODE 00 CLOCK 138 EDID-CLK HIGH

SRV-TOOL 00 See next.

6.2. SRV-TOOL

6.2.1. How to access

1. Select [SRV-TOOL] in Service Mode.

2. Press [OK] button on the remote control.

6.2.2. 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].

6.2.3. POWER ON TIME/COUNT

Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3 sec. Time : Cumulative power on time, indicated hour : minute by decimal Count : Number of ON times by decimal Note : This indication will not be cleared by either of the self-checks or any other command.

6.2.4. Exit

1. Disconnect the AC cord from wall outlet.

6.3. 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 [INPUT] 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 Mode Select hotel mode off/on Input Select input signal modes.

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

-/RF/HDMI1/HDMI2/HDMI3/HDMI4/Component/Video/PC

• OFF: give priority to a last memory.

Channel Select channel when input signal is RF.

Set the channel, each time power is switched on. Selection: Any channel number or [-]. [-] means the channel when turns off.

Volume Adjust the volume when each time power is

switched on. Range: 0 to 100

Vol. Max Adjust maximum volume.

Range: 0 to 100

OSD Ctrl Restrict the OSD.

Selection: Off/Pattern1

• Off: No restriction

• Pattern1: restriction

FP Ctrl Select front key conditions.

Selection: Off/Pattern1/All

• Off: altogether valid.

• Pattern1: altogether invalid.

• All: only input key is valid.

Pow Ctrl Select POWER-ON/OFF con dition when AC

power cord is disconnected and then connected. Off: The same condition when AC power cord is disconnected. On: Forced power ON condition.

6.4. Data Copy by SD Card

6.4.1. Purpose

(a) Board replacement (Copy the data when exchanging A-board):

When exchanging A-board, the data in original A-board can be copied to SD card and then copy to new A-board.

(b) Hotel (Copy the data when installing a number of units in hotel or any facility):

When installing a number of units in hotel or any facility, the data in master TV can be copied to SD card and then copy to other TVs.

6.4.2. Preparation

Make pwd file as startup file for (a) or (b) in a empty SD card.

1. Insert a empty SD card to your PC.

2. Right-click a blank area in a SD card window, point to New, and then click text document. A new file is created by default (New Text Document.txt).

3. Right-c lick the new text document that you just created and select rename, and then change the name and exten sion of the file to the following file name for (a) or (b) and press ENTER.

File name:

(a) For Board replacement : boardreplace.pwd (b) For Hotel : hotel.pwd

Note:

Please make only one file to prevent the operation error. No any other file should not be in SD card.

6.4.3. Data copy from TV set to SD Card

1. Turn on the TV set.

2. Insert SD card with a startup file (pwd file) to SD slot. On-screen Display will be appeared according to the startup file automatically.

3. Input a following password for (a) or (b) by using remote control.

(a) For Board replacement : 2770

(b) For Hotel : 4850 Data will be copied from TV set to SD card. It takes around 2 to 6 minutes maximum for copying.

4. After the completion of copying to SD card, remove SD card from TV set.

5. Turn off the TV set.

Note:

Following new folder will be created in SD card for data from TV set.

(a) For Board replacement : user_setup (b) For Hotel : hotel

6.4.4. Data copy from SD Card to TV set

1. Turn on the TV set.

2. Insert SD card with Data to SD slot. On-screen Display will be appeared according to the Data folder automatically.

3. Input a following password for (a) or (b) by using remote control.

(a) For Board replacement : 2771 (b) For Hotel : 4851

Data will be copied from SD card to TV set.

4. After the completion of copying to SD card, remove SD card from TV set.

(a) For Board replacement : Data will be deleted after copying (Limited one copy). (b) For Hotel : Data will not be deleted and can be used for other TVs.

5. Turn off the TV set.

Note:

1. Depending on the failure of boards, function of Data copy for board replacement does not work.

2. This function can be effective among the same model numbers.

7 Troubleshooting Guide

Use the self-check function to test the unit.

1. Checking the IIC bus lines

2. Power LED Blinking timing

7.1. Check of the IIC bus lines

7.1.1. How to access

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. 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 con-

trol for more than 3 seconds.

7.1.2. Exit

Disconnect the AC cord from wall outlet.

7.1.3. Screen display

7.1.4. Check Point

Confirm the following parts if NG was displayed.

DISPLAY Check Ref. No. Description Check Point PEAKS IC8000 PEAKS A-Board TUN TU4801C TUNER A-Board AVSW IC3001 AV SWITCH A-Board STBY IC8000 PEAKS (STM) A-Board MEM1 IC8902 EEPROM (PEAKS) A-Board MEM2 IC8901 EEPROM (STM) A-Board iPOD-CP IC3900 iPod-CP A-Board ID ID LP1 LP1 LCD PANEL HDMI-SW IC4700 HDMI-SW A-Board IRDRV IC5901 IR LED DRIVER A-Board

7.2. Power LED Blinking timing chart

1. Subject Information of LED Flashing timing chart.

2. Contents When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

Blinking Times Contents Check point

1 BACK LIGHT SOS LCD PANEL

3 Tuner SOS A-Board

4 P15V SOS A-Board

7 SUB 3.3V SOS A-Board 9 SOUND SOS A-Board

10 LP1 SOS LCD PANEL 13 EMERGENCY SOS A-Board 14 IROM SOS A-Board

P-Board

Speaker

7.3. LCD Panel test mode

Purpose:

To find the possible fa ilure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.

How to Enter:

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

How to Exit:

Disconnect AC plug from wall outlet.

How to confirm:

If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns. And then, judge by the following method. Still abnormal picture is displayed: The cause must be in LCD Panel. Normal picture is displayed: The cause must be in A board.

Remarks:

The test pattern is created by the circuit in LCD Panel. In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal. If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.

8 Disassembly and Assembly Instructions

8.1. Pedestal

1. Lay down the unit so that the rear cover faces upwa rd.

2. Remove the 4 screws.

3. Remove the pedestal.

8.2. Rear cover

1. Remove the 15 screws (A).

2. Remove the 7 screws (B).

3. Remove the 9 screw (C).

4. Remove the 4 M6 CAPs.

5. Remove the rear cover.

8.3. AC cord

1. Remove the bushing of the AC cord from the Cover bottom.

2. Disconnect the connector (P1) of AC cord.

8.4. Control panel assy

1. Remove the 2 screws.

2. Remove the control panel assy.

8.5. P-Board

1. Remove the 4 screws.

2. Disconnect the connectors (P1, P2 and P4).

3. Remove the P-Board.

8.7. A-Board

1. Remove the 5 screws.

2. Disconnect the connector (A02, A10, A12, A15, A16 and A30).

3. Remove the A-Board.

8.6. Side AV bracket

1. Remove the 1 screw.

2. Remove the side AV bracket.

8.8. Cover bottom

1. Remove the cover bottom.

8.9. Speaker box

1. Remove the speaker box.

2. Remove the 4 screws.

3. Remove the speaker bracket.

8.11. LCD Panel

1. Remove the 15 screws.

2. Remove the LCD panel.

8.10. Metal bracket bottom

1. Remove the 4 screws.

2. Remove the Metal bracket bottom.

8.12. KA-Board, S-Board and VBoard

1. Remove the 3 screws.

2. Disconnect the connector (KA10, S10 and V30).

3. Remove the KA-Board, S-Board and V-Board.

8.13. EMI processing

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