Panasonic TX-32LE8F, TX-32LE8FS, TX-32LE8L, TX-32LE8P, TX-32LE8PS Service manual

ORDER No. PCZ0805037CE

Service Manual

Colour LCD Television

TX-32LE8F

TX-32LE8FS

TX-32LE8L

TX-32LE8P

TX-32LE8PS

GLP23A Chassis

Specifications

Power Source: 220-240V AC, 50Hz

Power Consumption 121W

Stand-by Power Consumption: 1W 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)

Scanning format: 480i(60Hz), 480p(60Hz), 576i(50Hz), 576p(50Hz), 720p(60Hz), 720p(50Hz), 1.080i(60Hz),

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

Colour 34,47MHz (PAL) 34,5MHz, 34,65MHz (SECAM) 38,3MHz, 38,15MHz (SECAM L

1.080i(50Hz),

’), 39,75MHz (L’NICAM)

’)

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:0,3V 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 (for HDMI1, COMPONENT-AUDIO)

AUDIO OUT Audio (RCAx2) 500mV rms 1kΩ (high impedance) LCD screen: L5EDD8Q00035

1366 x 768 XGA, 16:9 Visible Diagonal 800mm

Audio Output: 20W (2x10W) Headphones: 3,5mm, 8Ω Impedance Accessories supplied : Remote Control 2 x R6 (UM3) Batteries Dimensions:

Height: Width: Depth:

Including TV stand 573mm 820mm 250mm

TV set only 535mm 820mm 108mm

Net weight:

Including TV stand 15.5kg TV set only 12.5kg

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.

2

Safety Precautions

Ω

μ

Ω

General Guide Lines

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 a s 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 TKP0E16001 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 transfor mer 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 across 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 follo wing 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 should 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

Measuring network for TOUCH CURRENTS

=1500Ω

R

S

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

R0=500Ω

Fig. 2

Fig. 1

C

=0.22μF

S

10k

F

0.022

V

U2 (V)

4

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 s oldering 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-propelle d 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 protectiv e material from the le ads 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 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).

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

5

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 side 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

6

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.

7

Service Hints

How to remove the backcover

Remove the 14 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

8

Chassis Board Layout

G-BOARD

A-BOARD

V-BOARD

Board Name Function

A-Board AV Terminal, Audio Video Processor, Speaker out, TV tuner, G-Board Side AV Terminal

V-Board Remote Receiver, R&G LED, C.A.T.S. K-Board Main Switch

Power Unit Main Input, Power Supply, Power Supply Regulator

POWER UNIT

K-BOARD

HDMI, HDMI Receiver

Location of Lead Wiring

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

A2-Panel_LVDS

A13/P3-INVERTER

G51-A7

INVERTER

G51

A10

A13

A2

A7

A5

A11

A8 A4

P3

P2

A1

P1

TU001

A5-SP

V1

K1

A8-V1

A4-K1

9

Setting Inspection

Voltage Confirmation

A board

Description Test point Position Range

30V TP3822 D3865 28V - 32V 12V TP3824 C3864 11,4V – 12,6V AUDO_15V A1, pin20,21 14V - 16V 8V TP3823 C3858, +pin 7,6V – 8,7V STBY3.3V TP3817 C3844, +pin 3,2V – 3,45V STBY1.8V TP3803 C3818, +pin 1,77V – 1,89V STBY5V TP3813 C3801 4,8V – 5,4V CEC3.8V TP3814 C1212 3,5V - 4,2V 3V3_HD TP3834 IC3808, pin 5 3V - 3,6V 1V8_HD TP3816 D3890 1,62V - 1,98V 5V_SIG TP3826 C3873 4,83V – 5,25V

Confirm the following voltages:

10

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-32LE8F TX-32LE8FS

TX-32LE8L

Panasonic GLP23A SW V1.07 25/04/08 E2 V04 CodeSum 65E1

Self Check Complete

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

Chasssis 22 Model 04 Size 32

VCTP B3

Panasonic GLP23A

SW V1.07 25/04/08 E2 V04 CodeSum 65E1

E2CRC: E3 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

Self Check Complete

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

Chasssis 22 Model 06 Size 32

VCTP B3

E2CRC: 6B OPTION 1 0F

OPTION 2 00 OPTION 3 B9 OPTION 4 11 OPTION 5 00 OPTION 6 45 OPTION 7 3D OPTION 8 58 OPTION 9 00 OPTION 10 00 OPTION 11 53 OPTION 12 28 OPTION 13 08

CHECK 36

Display Ref.No. Descripti on P.C.B

E2 IC1120 EEPROM A-Board

VCTP IC1501 AUDIO VIDEO PROCESSOR A-Board

TUN TU001 TUNER A-Board

HDMI IC5003 HDMI RECEIVER A-Board

TX-32LE8P TX-32LE8PS

Panasonic GLP23A SW V1.07 25/04/08 E2 V04 CodeSum 65E1

Self Check Complete

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

Chasssis 22 Model 05 Size 32

VCTP B3

E2CRC: BF OPTION 1 0F

OPTION 2 00 OPTION 3 B9 OPTION 4 11 OPTION 5 00 OPTION 6 45 OPTION 7 7D OPTION 8 58 OPTION 9 00 OPTION 10 00 OPTION 11 53 OPTION 12 20 OPTION 13 18

CHECK 7E

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

11

Adjustment Method

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

Setting indication

Sub-Contrast

35

DVCO

1

High 12 0330 0300 0304

Low 4 0048 0032 0042

Settings / Special features

Receive a 80% white level Philips Pattern 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 a 80% white level Philips Pattern 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

0

Optimum setting.

White Balance Adjustment

Instrument

• Remote Control

• LCD WB meter (Minolta CA-210 or equivalent)

Condition

• Switch on the TV Set. Enter Service1. Step down to Highlight line and keep the aging time more than 20 minutes.

Procedure

• After aging tim e above set White Raster No.12 for Highlight and No.4 for Lowlight . Press the OK button to store.

• Put Minolta Sensor to the center of the LCD Panel with 25mm gap between Minolta Sensor and LCD Panel. Adjust "x" and "y" values by changing Red and Blue values.

• Press OK button to store setting.

Item Value

x

Highlight

Lowlight

0,277 ± 0,015

y

0,290 ± 0,015

x

0,282 ± 0,015

y

0,284 ± 0,015

High 12

Low 4

12

Panasonic TX-32LE8F, TX-32LE8FS, TX-32LE8L, TX-32LE8P, TX-32LE8PS Service manual

Specifications

CONTENTS

Safety Precautions

Applicable signals

Service Hints

Chassis Board Layout

Location of Lead Wiring

Setting Inspection

Self Check

Adjustment Method