Panasonic TX-L32C10P, TX-L32C10PS, TX-L26C10P, TX-L26C10PS Service manual

ORDER No. PCZ0905093CE

Service Manual

Colour LCD Television

TX-L32C10P

TX-L32C10PS

TX-L26C10P

TX-L26C10PS

GLP24 Chassis

Specifications

(Information in brackets [ ] refers to model 26´´)

Power Source: 220-240V AC, 50Hz

Power Consumption 112W [64W]

Stand-by Power Consumption: 0.9W Aerial Impedance: 75Ω unbalanced, Coaxial Type Receiving System:

PAL-I/H, B/G, D/K

SECAM B/G, D/K, L/L’ PAL-525/60 (AV only) M.NTSC (AV only) NTSC (AV only)

Receiving Channels: VHF E2-E12 VHF H1-H2 (ITALY)

VHF A-H (ITALY) VHF R1-R2 VHF R3-R5 VHF R6-R12 UHF E21-E69 CATV (S01-S05) CATV S1-S10 (M1-M10) CATV S11-S20 (U1-U10) CATV S21-S41 (Hyperband)

Operating Conditions: Temperature: 0°C ÷ 35°C

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

and

Intermediate Frequency:

Video/Audio

Video 38.9MHz, 33.9MHz Audio 33.4MHz (B/G), 33.16MHz (A2)

33.05MHz (NICAM B/G, D/K, L’)

32.4MHz (D/K), 32.66MHz (CZ STEREO)

40.4MHz (L’), 39.75MHz (L’ NICAM) Colour 34.47MHz (PAL)

34.5MHz, 34.65MHz (SECAM)

38.3MHz, 38.15MHz (SECAM L’)

Terminals: AV1 IN Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 10kΩ

RGB (21 pin) 0.7V p-p 75Ω AV1 OUT Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 1kΩ

AV2 IN Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 10kΩ RGB (21 pin) 0.7V p-p 75Ω S-video IN (21-pin) Y: 1V p-p 75Ω C:0.3V p-p 75Ω

AV2 OUT Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 1kΩ

AV3 IN S-Video IN (4-pin) Y: 1V p-p 75Ω

C:0.286V p-p 75Ω

Audio (RCAx2) 500mV rms 10kΩ

Video (RCAx1) 1V p-p 75Ω

HDMI1, HDMI2 Type A Connector COMPONENT Video (RCAx3) Y:1V p-p 75Ω (including synchronization)

Pb, Pr: ±0.35V p-p 75Ω AUDIO IN Audio (RCAx2) 500mV rms 10kΩ (used for HDMI1, COMPONENT-AUDIO)

AUDIO OUT Audio (RCAx2) 500mV rms 1kΩ (high Impedance)

LCD screen: L5EDD8Q00048 [L5EDD6Q00029] 1,366 x 768 WXGA, 16:9 Visible Diagonal 800mm [660mm]

Audio Output: 20W (2x10W), 10% THD Headphones: 3.5mm (M3), 8Ω Impedance Accessories supplied : Remote Control 2 x R6 (UM3) Batteries Dimensions:

Height: Width: Depth:

Including TV stand 551mm 798mm 217mm [474mm] [664mm] [217mm]

TV set only 511mm 798mm 87mm [434mm] [664mm] [113mm]

Net weight: Including TV stand 12.5kg [10.0kg]

TV set only 11.0kg [8.5kg]

Specifications are subject to change without notice. Weights and dimensions shown are approximate.

Warning

This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potencial dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products deal within this service information by anyone else could result in serious injury or death.

SAFETY PRECAUTIONS..........................................................................4

GENERAL GUIDE LINES..................................................................... 4

TOUCH – CURRENT CHECK.............................................................. 4

PREVENTION OF ELECTROSTATIC DISCHARGE (ESD)

TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES..........................5

ABOUT LEAD FREE SOLDER (PBF)........................................................ 6

SUGGESTED PB FREE SOLDER....................................................... 6

APPLICABLE SIGNALS............................................................................. 7

SERVICE HINTS ....................................................................................... 8

CHASSIS BOARD LAYOUT......................................................................9

LOCATION OF LEAD WIRING…………………………………………….9

SETTING INSPECTION........................................................................... 10

SELF-CHECK .......................................................................................... 11

SERVICE MODE ..................................................................................... 12

ADJUSTMENT METHOD ........................................................................ 13

WIRING DIAGRAM.................................................................................. 14

BLOCK DIAGRAMS................................................................................. 15

PARTS LOCATION.................................................................................. 18

REPLACEMENT PARTS LIST................................................................. 20

SCHEMATIC DIAGRAMS........................................................................ 29

A-BOARD (1 OF 5) SCHEMATIC DIAGRAM..................................... 30

V-BOARD SCHEMATIC DIAGRAM ................................................... 35

CONDUCTOR VIEWS.............................................................................36

Safety Precautions

General Guide Lines

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overhe ated 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 touch current checks to prevent the customer from being exposed to shock hazards.

4. Always ensure panel TKP0E37301 is correctly replaced before returning to customer (see Fig.1).

Touch-Current Check

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Fig. 2.

3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential acr oss the measuring network.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reserve the AC plug in the AC outlet and repeat each of the above measure.

6. The potential at any point (TOUCH CURRENT) expressed as voltage U1 and U2, does not exceed the following values: For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak); For d. c.: U1 = 1.0 V, Note: The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and

2.0 mA d. c. The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.

7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment shoul d be repaired and rechecked before it is returned to the customer.

COLD WATER PIPE (EARTH GROUND)

TO APPLIANCES EXPOSED

METAL PARTS Resistance values in ohms (Ω) V: Voltmetr or oscilloscope

(r.m.s. or peak reading)

NOTE – Appropriate measures should be taken to obtain the correct value in case of non-sinusoidal waveforms

Fig. 1

Measuring network for TOUCH CURRENTS

=1500Ω

R0=500Ω

Input resistance: ≥ 1M Input capacitance: ≤ 200pF Frequency range: 15Hz to 1MHz and d.c.respectively

Fig. 2

=0.22μF

10k

0.022μF

U2 (V)

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 build up 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 cond uctive 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 harmless motion such as th e 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).

There are special components used in this equipment which are important for safety. These parts are marked by in schematic diagrams, exploded views and replacement parts list. It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of manufacturer.

IMPORTANT SAFETY NOTICE

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

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 ten d 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 sid e for excess solder which may

flow onto the opposite side. (see Fig.3)

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. (see Fig.4)

Fig.3

Fig.4

Applicable Signals

Component (Y, Pb, Pr), HDMI

Note:

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 * *

• Signals other than above may not be displayed properly.

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

Service Hints

How to remove the backcover

Remove the 19 fixing screws. (see Fig.5)

SCREWS

How to remove the Pedestal assembly

Lay the main unit face down. (see Fig.6)

Remove the 4 fixing screws and the pedestal assembly. (see Fig.7)

Fig.5

Fig.6

Fig.7

SCREWS

Chassis Board Layout

A01A

POWER UNIT

V-BOARD

Board Name Function

A-Board Tuner,VCTP,HDMI,

AV Terminal, Speaker out, Side AV Connector

Power Unit Power Supply, Main Input

V-Board Remote Receiver, Bats, R/G LED

Location of Lead Wiring

To find the Part Number of required wire in Replacement Parts List click on the wire name in red box.

A20-P3

[ 26´´]

[ 32´´]

A2-PAN A20-P3

A-BOARD

A20

CN1

A11

S01

TU001

A01-S01 A12-SP

[ 32´´] [ 32´´] [ 32´´]

A01-S01

A12-SP

A10-V10

A10-V10 [ 26´´] [ 26´´] [ 26´´]

Setting Inspection

Voltage Confirmation

Confirm the following voltages:

A board

5VS TP2765 5.6V +/- 0.25V SUB_ TNR_6V TP2770 5.6V +/- 0.25V GND TP2766 0 TV_SOS TP5481 0

INVERTER_SOS TP2761 0 P17V TP2777 17V +/- 1V SUB_F_12V TP2782 12V +/- 1V INV_ON TP2759 2.85V +/- 2%

TP No.

Voltage

Self Check

Self-check is used to automatically check the bus lines and hexadecimal code of the TV set. To enter Self-Check mode, keep pressing the down (-/v) button on the TV set and press the STATUS button on the remote control. To exit Self Check, switch off the TV set at the power button.

TX-L32C10P/PS

E2 O.K. VCTP O.K. TUN O.K. HDMI O.K.

Chassis 24 Model 03 Size 32 VCTP B3

Panasonic 2009LCD

Self Check Complete

E2CRC 65 OPTION 1 0F

OPTION 2 00 OPTION 3 B9 OPTION 4 11 OPTION 5 00 OPTION 6 45 OPTION 7 7D OPTION 8 D8 OPTION 9 00 OPTION 10 00 OPTION 11 53 OPTION 12 20 OPTION 13 18 CHECK FE

Display Ref. No. Description P.C.B.

E2 IC1120 EEPROM A-Board

VCTP IC1501 AUDIO VIDEO TEXT PROCESSOR A-Board

TUN TU001 TUNER A-Board

HDMI IC5003 HDMI A-Board

SW V1.01 E2 V02

TX-L26C10P/PS

E2 O.K. VCTP O.K. TUN O.K. HDMI O.K.

Chassis 24 Model 04 Size 26 VCTP B3

Panasonic 2009LCD Self Check Complete

E2CRC 70 OPTION 1 0F

OPTION 2 00 OPTION 3 B9 OPTION 4 11 OPTION 5 00 OPTION 6 45 OPTION 7 7D OPTION 8 D8 OPTION 9 00 OPTION 10 00 OPTION 11 53 OPTION 12 60 OPTION 13 18 CHECK 3E

SW V1.01 E2 V02

If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.".

Service MODE

How to enter Service 1

• Set the Bass to maxim um position, set the Treble to minimum position then keep pressing the INDEX button on the remote control and press the down button (-/v) on the TV set, this will place the TV set into the Service Mode 1.

Key Command

• Press the RED / GREEN buttons to step up / down through the functions.

• Press the YELLOW / BLUE buttons to alter the function values, to alter White Rasters use +/- buttons

• Press the OK button after each adjustment has been made to store the required values.

• To exit the Service Mode, press the "N" button.

Keep adjusting sequence: DVCO, Sub-Contrast, other items.

Item

Sub-Contrast

DVCO

Highlight

Lowlight

Note: All setting values are approximate

High 12 0410 0410 0304

Low 4 0064 0064 0064

Setting indication

Sub-Contrast

DVCO

Settings / Special features

Receive PAL colour bar (100% white) RF signal with correct sound system (B/G, D/K) via aerial input. For

Sub-Contrast alignment press "Blue" button, wait until

the figure colour is changed from red to black colour.

Press the OK.

Receive PAL colour bar (100% white) RF signal via

aerial input. For DVCO alignment press "Blue"

button, wait until the figure colour is changed from red

to black colour. Press the OK.

For correct setting see White Balance Adjustment

Sub-Brightness

Optimum setting.

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