Panasonic TH-L32X10A Schematic

TH-L32X10A

LH88 Chassis

ORDER NO. SMT0902002CE

LCD TV

Specifications

Power Source

Power Consumption

LCD

Screen Size

Sound

Speaker

Audio Output

Headphones

PC signals

Receiving System/Band name

PAL B/G

DVB-T

PAL 60Hz

M.NTSC

NTSC

Aerial-Rear

Operating Conditions

AC 220-240V, 50/60 Hz

Power rating:114W

Normal(Home) mode:91W

Standby condition:0.4W

80cm

Wide XGA (1366 × 768 pixels) 16:9 aspect ratio LCD panel.

698mm(W) × 393mm(H)

160mm × 42mm× 2pcs,8 Ω

20W(10W+10W)10% THD

M3 (3.5 mm)stereo mini Jack × 1

VGA, SVGA, XGA

SXGA ...........(compressed)

Horizontal scanning frequency 31 - 69 kHz

Vertical scanning frequency 59 - 86 Hz

Reception of Off air broadcasts

7MHz VHF/UHF(Australia)free-to-air TV broadcast reception

Playback of NTSC tape from some PAL Video recorders(VCR)

Playback from M.NTSC Video recorders(VCR)

Playback from NTSC Video recorders(VCR)

VHF/UHF

Temperature : 0°C - 35°C

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

Connection Terminals

TH-L32X10A

AV3

AV1/AV2

Others

HDMI 1-3 Input:

PC Input

AUDIO L-R

DIGITAL AUDIO OUT

Card slot

Monitor Output

Dimensions ( W x H x D )

Including TV Stand

TV Set Only

Weight

Note:

Design and specifications are subject to change without notice. Weight and Dimensions shown are approximate.

VIDEO (RCA Pin Type) 1.0 V[p-p] (75 Ω)

S-VIDEO (MINI DIN 4-pin) Y: 1.0 V[p-p] (75 Ω), C: 0.286 V[p-p] (75 Ω)

AUDIO L-R (RCA Pin Type × 2) 0.5 V[rms]

VIDEO (RCA Pin Type) 1.0 V[p-p] (75 Ω)

AUDIO L-R (RCA Pin Type × 2) 0.5 V[rms]

Y 1.0 V[p-p] (including synchronization)

PBCB/PRC

TYPE A Connectors (This TV supports "HDAVI Control 4" function.)

HIGH-DENSITY D-SUB 15PIN R, G, B/0.7 V[p-p] (75Ω)

HD, VD/TTL Level 2.0 - 5.0 V[p-p](high impedance)

RCA PIN Type × 2 0.5 V[rms]

PCM/Dolby Digital, Fiber optic

SD CARD slot × 1

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

AUDIO L-R (RCA PIN Type × 2) 0.5V[rms](high impedance)

798mm × 511mm × 217mm

798mm × 511mm × 93mm

13.5 kg Net(With Pedestal)

11.5 kg Net(TV only)

±0.35 V[p-p]

CONTENTS

Page Page

1 Safety Precautions 4

1.1. General Guidelines

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

3 About lead free solder (PbF)

4 Input signal that can be displayed

5 Self-check function

5.1. Self-check

6 Power LED blinking timing chart

7 Chassis Board Layout

8 Before servicing

8.1. Location of Lead wiring

8.2. EMI 1 processing

8.3. EMI 2 processing

9 Maintenance Disassembly

9.1. Remove the back cover

9.2. Remove AC cord

9.3. Control panel assy

9.4. Side AV stand bracket,A-board,P-board

9.5. Remove the speaker

9.6. V-board and LED panel

9.7. LCD screen

10 Service Mode

10.1. How to enter into Service Mode

10.2. SRV-TOOL

10.3. Option Description

10.4. OPTION Setting

11 Hotel Mode Access

11.1. Purpose

11.2. Access command to the Hotel mode setup menu

11.3. To exit the Hotel mode setup menu.

11.4. Explain the Hotel mode setup menu.

12 Adjustment Method

12.1. P-board voltage testing point

12.2. A-board voltage testing point

13 Conductor Views

13.1. P-Board

13.2. A-Board

13.3. K and V-Board

14 Schematic Diagram

14.1. Schematic Diagram Notes

14.2. P-Board (1/3) Schematic Diagram

14.3. P-Board (2/3) Schematic Diagram

14.4. P-Board (3/3) Schematic Diagram

TH-L32X10A

14.5. A-Board (1/24) Schematic Diagram 31

14.6. A-Board (2/24) Schematic Diagram

14.7. A-Board (3/24) Schematic Diagram

14.8. A-Board (4/24) Schematic Diagram

14.9. A-Board (5/24) Schematic Diagram

14.10. A-Board (6/24) Schematic Diagram

14.11. A-Board (7/24) Schematic Diagram

14.12. A-Board (8/24) Schematic Diagram

14.13. A-Board (9/24) Schematic Diagram

14.14. A-Board (10/24) Schematic Diagram

14.15. A-Board (11/24) Schematic Diagram

14.16. A-Board (12/24) Schematic Diagram

14.17. A-Board (13/24) Schematic Diagram

14.18. A-Board (14/24) Schematic Diagram

14.19. A-Board (15/24) Schematic Diagram

14.20. A-Board (16/24) Schematic Diagram

14.21. A-Board (17/24) Schematic Diagram

14.22. A-Board (18/24) Schematic Diagram

14.23. A-Board (19/24) Schematic Diagram

14.24. A-Board (20/24) Schematic Diagram

14.25. A-Board (21/24) Schematic Diagram

14.26. A-Board (22/24) Schematic Diagram

14.27. A-Board (23/24) Schematic Diagram

14.28. A-Board (24/24) Schematic Diagram

14.29. K-Board Schematic Diagram

14.30. V-Board Schematic Diagram

15 Parts Location

16 Package exploded view

17 Mechanical Replacement Parts List

18 Electrical Replacement Parts List

18.1. Replacement Parts List Notes

18.2. Electrical Replacement Parts List

19 SCHEMATIC DIAGRAM FOR PRINTING WITH A4

TH-L32X10A

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.

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 between 1MΩand 5.2MΩ.

When the exposed metal does not have a return path to the chassis, the reading must be

Figure 1

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 1.5kΩ, 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.

TH-L32X10A

2 Prevention of Electro Static 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 electro static 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, alminum 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 handlin g unpackaged replacement ES devices. (Otherwise hamless 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-L32X10A

3 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

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).

•

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 Pbsolder. 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.

stamped on the back of PCB.

4 Input signal that can be displayed

COMPONENT (Y, PB/CB,PR/CR), HDMI

* Mark: Applicable input signal

Signal name Component HDMI 525(480)/60i * *

525(480)/60p * *

625(576)/50i * * 625(576)/50p * * 750(720)/60p * * 750(720)/50p * *

1,125(1,080)/60i * *

1,125(1,080)/50i * * 1,125(1,080)/60p * 1,125(1,080)/50p * 1,125(1,080)/24p *

PC (D-sub 15P)

Signal name Horizontal frequency(kHz) Vertical frequency(Hz) 640 × 400 @ 70 Hz 31.47 70.07 640 × 480 @ 60 Hz 31.47 59.94 640 × 480 @ 75 Hz 37.50 75.00 800 × 600 @ 60 Hz 37.88 60.32 800 × 600 @ 75 Hz 46.88 75.00 800 × 600 @ 85 Hz 53.67 85.06 852 × 480 @ 60 Hz 31.44 59.89

1,024 × 768 @ 60 Hz 48.36 60.00 1,024 × 768 @ 70 Hz 56.48 70.07 1,024 × 768 @ 75 Hz 60.02 75.03 1,024 × 768 @ 85 Hz 68.68 85.00

1,280 × 1,024 @ 60 Hz 63.98 60.02

1,280 × 768 @ 60 Hz 47.70 60.00

1,366 × 768 @ 60 Hz 48.39 60.04 Macintosh13” (640 × 480) 35.00 66.67 Macintosh16” (832 × 624) 49.73 74.55

Macintosh21” (1,152 × 870) 68.68 75.06

TH-L32X10A

Note

•

Signals other than above may not be displayed properly.

• •

•

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

• •

•

Applicable input signal for PC is basically compatible to VESA standard timing.

• •

•

PC signal is magnified or compressed for display , so that it may not be possible to show fine detail with sufficient clarity.

• •

TH-L32X10A

5 Self-check function

5.1. Self-check

1. Self-check is used to check the bus of the TV and the Hex code.

2. To enter the self-check mode, pressing -/V button on the user’s controller which is on the side of the main unit, press MENU button on the remote controller unit simultaneously, and then the display screen will appear:

3. Turn off the TV after self-checking, and any programmed channels, channels caption data and some other user defined settings will be erased and return to factory setting.

Display Ref No. Description P.C.B. ADV IC4510 A/D convert A-Board ADAV IC4510 Audio Processor A-Board GENX IC1100 Microprocessor A-Board MEM1 IC1101 EEPROM(GENX) A-Board MEM2 IC8502 EEPROM(PEAKS LITE2) A-Board TUN TU2901 TUNER A-Board AVSW IC3001 AUDIO VIDEO SWITCH A-Board OFDM IC8301 Orthogonal Frequency Division Multiplexing A-Board TEMP IC1000 TEMP SENSOR A-Board VIF TU2901 TUNER A-Board

6 Power LED blinking timing chart

1. Subject

Information of LED Flashing timing chart.

2. Contents

When 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 number of blinking of the Power LED on the front panel of the unit.

Priority Blinking timing SOS detection subject LED blinking

1 INVERTER_SOS 1

2 FAN_SOS 2

3 SOS 3

TH-L32X10A

4 DTV_9V 4

5 SUB_5V 6

6 MAIN_9V 5

7 SUB_3.3V 7

8 MAIN_3.3V 8

9 SOUND_SOS 9

10 ZWEI_SOS 10

11 AUDIO_PWM_SOS 14

12 Emergency 13

TH-L32X10A

7 Chassis Board Layout

Board Name Function A-board AVSW, TUN, OFDM, ADV, P-AVC, GENX, EEP, TEMP P-board Power Supply V-board Remote, LED,Luminunce Sensor K-board KEY,Power SW

8 Before servicing

8.1. Location of Lead wiring

TH-L32X10A

8.2. EMI 1 processing

8.3. EMI 2 processing

TH-L32X10A

9 Maintenance Disassembly

9.1. Remove the back cover

1. Lay the main unit down with the back cover facing upwards.

2. Please refer to the Operating Instruction about the pedestal bracket.

3. Remove screws (×15, ×3).

4. Remove back cover.

9.2. Remove AC cord

1. Remove the back cover. (See 9.1)

2. Disconnect the AC cord from AC cord bracket .

3. Unlock the cable clamper A,disconnect connector P1.

4. Remove AC cord.

9.3. Control panel assy

1. Remove the back cover (See 9.1)

2. Remove screws(×2) and remove control panel assy.

3. Remove screws(×4), then remove K-PCB,control button,control panel bracket.

9.4. Side AV stand bracket,A-board,P-board

1. Take off pedestal bracket. (See 9.1)

2. Remove screws(×2) and side AV stand bracket.

3. Unlock the cable from cable clamper,disconnect the connector.

4. Remove screws(×5), take off A-board;Remove screws(×7), take off P-board.

TH-L32X10A

9.5. Remove the speaker

1. Remove the back cover (See 9.1)

2. Remove screws(×4) and speaker.

9.6. V-board and LED panel

1. Remove the back cover.(See 9.1)

2. Remove screws(×1) and clamper,disconnect the connector.

3. Remove V-board and LED panel.

9.7. LCD screen

1. Remove main chassis (See 9.3)

2. Remove screws (×6,×12).

3. Remove the VESA Metal Assy,LCD side MTG , LCD bottom corner MTG, LCD btm MTG.

4. Remove screws (×6) and remove the A-PB-MTG-Metals (×4).

5. Remove LCD screen.

10 Service Mode

10.1. How to enter into Service Mode

While pressing [-/v] button of the main unit, press [INFO] button of the remote control three times within 3 seconds.

TH-L32X10A

10.1.1. 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 ( - )

10.1.2. 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 WB-ADJ R-GAIN FF

G-GAIN F5 B-GAIN F8 R-CENT 92 G-CENT 80 B-CENT 81

OPTION Boot ROM

STBY-SET 00 Y/C_Delay 0 OPT1 98 OPT2 22 OPT3 05

SRV-TOOL 00

TH-L32X10A

10.1.3. How to exit

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

10.2. SRV-TOOL

10.2.1. How to access

1. Select "SRV-TOOL" in Service main Mode.

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

10.2.2. Exit

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

10.3. Option Description

Name Value Current Default TH-L32X10A Note

option1

b0 ATP Search speed Slow(1)/Fast(0) Fast (0) 0 For CS b1 TEXT Ch Refresh enable(1)/disable(0) disable (0) 0 For CS

b2 ID-1 enable(1)/disable(0) disable (0) 0 For CS EEPROM b3 Macrovision Auto-judge enable(1)/disable(0) disable (0) 1 For derivative models 004B b4 SRS surround surround_1(1)/surround_0(0) surround_0 (0) 0 For derivative models

b5 Teletext Top-service disable(1)/enable(0) enable (0) 0 For derivative models

b6 Pre Emphasis enable(1)/disable(0) disable (0) 0 For derivative models

b7 1 option2

b0 0

b1 A2 enable(5.5) enable(1)/disable(0) disable (0) 1 For CS

b2 A2 enable(6.0) enable(1)/disable(0) disable (0) 0 China/Asia Only EEPROM b3 A2 enable(6.5) enable(1)/disable(0) disable (0) 0 004C b4 0

b5 NICAM enable(5.5) enable(1)/disable(0) disable (0) 0 For CS

b6 NICAM enable(6.0) enable(1)/disable(0) disable (0) 0 China/Asia Only

b7 NICAM enable(6.5) enable(1)/disable(0) disable (0) 0 option3

b0 NICAM priority(ASI A/M.E) enable(1)/disable(0) disable (0) 0 For CS

b1 NICAM priority(K/UK) enable(1)/disable(0) disable (0) 0 China/Asia Only

b2 NICAM priority(CHINA) enable(1)/disable(0) disable (0) 0 EEPROM b3 NICAM priority(NZ/INDN) enable(1)/disable(0) disable (0) 0 004D b4 NICAM priority(AUS) enable(1)/disable(0) disable (0) 0

b5 NICAM priority(E.E URO) enable(1)/disable(0) disable (0) 0

b6 NICAM priority(SPECIAL) enable(1)/disable(0) disable (0) 0

b7 0

10.4. OPTION Setting

If the memory IC or DG Board is replaced, option code should be re-memorized.

If you use for other model, you should re-memorized the different option code in SERVICE mode.

Option No. TH-L32X10A

OPTION1 98 OPTION2 22 OPTION3 05

11 Hotel Mode Access

11.1. Purpose

Restrict a function for hotels.

11.2. Access command to the Hotel mode setup menu

In order to display the Hotel mode setup menu, please enter the following command (within 2 second).

[TV] : Hold Vol [Down] + [Remote] : Press AV button 3times.

Then, the Hotel mode setup menu is display ed.

TH-L32X10A

11.3. To exit the Hotel mode setup menu.

Disconnect AC power cord from wall outlet or switch off thepower with the [POWER] button on the main unit.

11.4. Explain the Hotel mode setup menu.

Item Function Hotel Mode Select hotel mode ON/OFF Initial INPUT Select input signal modes.

Initial VOL level Adjust the volume when each time power is switched on.

Maximum VOLlevel Adjust maximum volume.

Initial POS Select programme number.

Button lock Select local key conditions.

Remote lock Select remote control key conditions.

Set the input, when each time power is switched on. Selection : Off/Analogue TV/Digital TV/AV1/AV2/AV3/PC/H DMI 1/HDMI 2/HDMI 3:

•

• Off: give priority to a last memory.

• •

•

• Selectable input is depend on the model.

• •

Selection/Range : Off/0 to 100

•

• Off: give priority to a last memory.

• •

Range : 0 to 100

Selection : Off/0 to 99

•

• Off: give priority to a last memory.

• •

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.

• •

Selection : Off/SETUP/MENU

•

• Off: altogether valid..

• •

•

• SETUP: only Setup menu is invalid.

• •

•

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

• •

TH-L32X10A

12 Adjustment Method

12.1. P-board voltage testing point

Instrument Name Connection Remarks

Digital Voltmeter

Procedures

1. Turn on the power switch and check if the voltages at every testing point are involved in the below specifications.

2. Switch off the power through remote control and place it in the standby mode. Check if the voltages at very testing point are involved in the below specifications.

12.2. A-board voltage testing point

Instrument Name Connection Remarks

Digital Voltmeter

Procedures

1. Turn on the power switch and check if the voltages at every testing point are involved in the below specifications.

13 Conductor Views

13.1. P-Board

P-BOARD (FOIL SIDE) TXN/P10NWY

TH-L32X10A

TH-L32X10A P-BOARD TXN/P10NWC

54321

TH-L32X10A P-BOARD TXN/P10NWC

9876

TH-L32X10A

P-BOARD (COMPONENT SIDE) TXN/P10NWY

TH-L32X10A P-BOARD TXN/P10NWC

54321

TH-L32X10A P-BOARD TXN/P10NWC

9876

13.2. A-Board

A-BOARD (A SIDE) TXN/A10NWY

TH-L32X10A

TH-L32X10A A-BOARD TXN/A10NWY

54321

TH-L32X10A A-BOARD TXN/A10NWY

9876

TH-L32X10A

A-BOARD (B SIDE) TXN/A10NWY

TH-L32X10A A-BOARD TXN/A10NWY

54321

TH-L32X10A A-BOARD TXN/A10NWY

9876

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