Panasonic TX-L42D25B - User Manual

Service Manual
Colour LCD Television
TX-L42D25B
TX-L42D26B
LA02 Chassis
Specifications
Power Source: 220-240V AC, 50/60Hz
Power Consumption 152W
Stand-by Power Consumption: 0.30W (Without monitor out recording)
36W (With monitor out recording)
Aerial Impedance: 75Ω unbalanced, Coaxial Type
Receiving System: PAL-I
PAL-525/60 (AV only)
DVB-T/T2 Digital terrestrial services via UHF aerial input.
DVB-S/S2 – (freesat Other Sat.):
freesat services via Satellite dish input.
Receiver frequency range – 950 MHz to 2,150MHz
LNB Power and Polarisation – Vertical: +13V
Horizontal: +18V
Current: Max. 500mA (overload protection)
22 kHz Tone – Frequency: 22kHz ± 2kHz
Amplitude: 0.6V ± 0.2V
Symbol Rate – Max. 30MS/s
FEC Mode – 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
Demodulation – QPSK, 8PSK
Not available for DiSEqC control.
M.NTSC (AV only)
NTSC (AV only)
PC signals: VGA, SVGA, WVGA, XGA, SXGA, WXGA (compressed)
Horizontal scanning frequency 31 – 69 kHz
Vertical scanning frequency 59 – 86 Hz
Receiving Chanels: UHF E21-E68
Aerial - Rear:
UHF
Operating Conditions: Temperature : 0°C ÷ 35°C
Humidity : 20% ÷ 80% RH (non condensing)
© Panasonic Corporation 2010.
Unauthorized copying
and
distribution is a violation of law.
ORDER No. PCZ1004053CE

Panasonic TX-L42D25B Specifications

General

Screen Size	42 inches
Resolution	1920 x 1080
Display Type	LCD
HDMI Ports	4
USB Ports	2
Wi-Fi	No
Backlight	LED
Refresh Rate	100 Hz
3D Capable	No
Smart TV	No
Energy Efficiency Class	A
Viewing Angle	178 degrees
Weight (with stand)	18 kg

Summary

Specifications

Safety Precautions

General Guide Lines

Guidelines for safe servicing, lead dress, and protective device installation.

Touch-Current Check

Procedure for verifying touch current levels to prevent shock hazards post-servicing.

Prevention of Electrostatic Discharge (ESD)

Important Safety Notice

Techniques to prevent component damage from static electricity during handling.

Service Hints

How to remove the back cover

Step-by-step instructions for safely removing the rear cover of the TV unit.

Chassis Board Layout

Technical Description

Model and Keys

Mapping of TV models to their support for CI Plus, DTCP-IP, and One-to-One features.

Setting Inspection

Voltage Confirmation

Table of test points and expected voltage readings for various circuit boards.

Self Check

Power LED blinking timing chart

Service Mode Function

How to enter SERVICE

Instructions to access the service menu via the TV unit and remote control buttons.

Service Menu Operation

Key Command

Explanation of remote control commands for navigating and adjusting service menu options.

Service Tool Mode

How to access

Steps to enter Service Tool Mode by selecting [SRV-TOOL] and pressing [OK] on remote.

Display of SOS History

Indication of SOS History based on Power LED blinking patterns.

Hotel Mode

Access command to the Hotel mode setup menu

Sequence of button presses to enter Hotel mode setup menu on the TV.

Explain the Hotel mode setup menu

Description of Hotel mode menu items and their functions/selections.

Data Copy by SD Card

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

Procedure for backing up and restoring A-board settings using an SD card.

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

Copying data from master TV to SD card for hotel installations.

Data Copy from TV set to SD Card

Data Copy from SD Card to TV set

Option Bytes Description

Adjustment Method

Sub-Contrast;White Balance Adjustment

Procedure for adjusting image contrast and white balance using equipment and signals.

Wiring diagram

Block Diagram (1;2)

Block Diagram (2;2)

Parts Location

Replacement Parts List

Important Safety Notice

Notice highlighting safety-critical components requiring manufacturer-specified parts.

RTL (Retention Time Limited)

Information on parts with limited availability periods after production discontinuation.

Schematic Diagrams

IMPORTANT SAFETY NOTICE

Notice regarding safety-critical components and using manufacturer-specified parts.

NOTE

Notes on resistor, capacitor, coil units, test points, earth symbols, voltage measurement.

REMARKS

Safety remarks about touching hot parts, short circuits, and instrument connections.