Panasonic Viera TC-L42D2 Quick start guide

Slide # 1
Title Page
Panasonic National Training
Panasonic Service and Technology Company
2010 LCD TV Technical Guide
2010-LCD HD/FHD TV (13th Generation)
TC-L42D2
TC-L37D2
TC-L42U25
TC-L37U22
TC-L32U22
TC-L37X2
TC-L32X2
TC-L22X2
TC-L37C22
TC-L32C22
Applies to models:
TTG100618JM/100720

Slide # 2
Prepared by
Jean Magloire
Panasonic Service and Technology Company
National Training
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 potential 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 dealt with in this
service information by anyone else could result in serious injury or death.
Copyright © 2010 by Panasonic Service and Technology Company
All rights reserved. Unauthorized copying and distribution is a violation of law.
"HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.“
Warning

Slide # 3
Table of Contents
Topics 4Troubleshooting TCON Problems 42
Highlights 5Audio Process Circuit 44
Features 7SOS Detect (Shutdown) 45
Panasonic LED Backlighting Techniques 8TC-L37U22 Power LED Diagnostic Codes 46
LED Backlighting Techniques 9TC-L42D2 Power LED Diagnostic Codes 47
2010 D Series 10 1 Blink SOS Circuit 48
2010 U Series 11 3 and 7 Blinks SOS Circuit 51
2010 X Series 12 3 Blinks SOS Circuit Troubleshooting 53
2010 C Series 13 7 Blinks SOS Circuit Troubleshooting 54
Feature Comparison 14 4 Blinks SOS Circuit 55
2010 Series Description 15 4 Blinks SOS Circuit Troubleshooting 56
TC-L37U22 Board Layout 17 iPod SOS Circuit 57
TC-L37U22 Board Layout 18 9 Blinks SOS Circuit 58
TC-L37D2 Board Layout 19 Service Mode 60
TC-L37D2 Board Layout 20 Service Mode Menu (D2 Series) 61
TC-L37D2 P-Board Pictorial 21 D Series Measurements and Adjustments 62
TC-L37D2 A-Board Pictorial 22 How to Enter the Service Mode_ SRV-TOOL 63
TC-L37D2 TC-Board Pictorial 23 How to Enter the Self-check Mode 64
Standby Power_ All except D2 Series 24 Troubleshooting Picture Problems (All Series except D) 65
Standby Power_ D2 Series 25 Troubleshooting Picture Problems (D Series 78
Power-on Part 1_ All Except D2 26 Sound Defect 87
Power On Part 2_ All Series Except D2 28 Panel Free Run Mode 88
Power-on Part 1_ D2 Series 30 Data Copy by SD Card 89
Power On Part 2_ D2 series 32 Data Copy Preparation 90
CPU Commands Explanation 33 Data copy from the TV to SD Card 91
Inverter Circuit and 1 Blink SOS 34 Data copy from the SD Card to TV 92
LED Backlight Control 36 Glossary 93
U and X Series Video Signal Process Circuit 38
D Series Video Signal Process Circuit 40

Slide # 4
Topics
1. Features
2. Start-up Operation
A) Stand by Operation
B) Power On Operation
C) Voltage Distribution
3. SOS Detect
4. Signal process Circuit
A) Video Signal
B) Audio Signal
5. Service Notes
A) Service Mode
B) SRV-TOOL
C) Self check
D) SD card
6. Troubleshooting
7. Glossary

Slide # 5
IPS Panel
The IPS panel in 2010 VIERA models is an LCD panel that provides beautiful viewing from virtually any angle.
Colors appear uniform and consistent even when viewed from a wide angle, so images look fresh and natural no
matter where you're sitting. The panel's high light transmittance also maximizes the efficiency of the LED
backlight.
VA System IPS System
Highlights

Slide # 6
LED Backlight
Boasting a high luminous efficiency, the
LED backlight helps deliver a brighter,
more vivid picture while using less
electricity. You enjoy the kind of bright,
beautiful images that make VIERA such
outstanding entertainment, while also
saving energy.
Intelligent Scene Controller
Intelligent A.I. conducts a detailed analysis of
image motion and brightness information to
optimize the backlight brightness. This creates
sharp images by faithfully reproducing the
brightness of each scene while keeping the
power consumption low.
Highlights

Slide # 7
Features
Main Differences between the 2010 model and 2009 model
The different point of 37/32 inch 2010 models and 37/32 inch 2009
models are as follows:
Audio processor, Micom, HDMI de-multiplexer and video signal
processor are integrated to IC8001 Nile Tcon. IC4510 was
eliminated.
IC8300 Digital demodulator was eliminated.
Tuner power BT30V was eliminated (Tuner is operated by only 5V).
P4 terminal is integrated to P2 terminal.
A20 terminal is integrated to A03 terminal.

Slide # 8
Panasonic LED Backlighting Techniques
LED-LCD televisions have white LEDs that are arranged around the inside frame of
the TV along with a special light diffusion panel designed to spread the light evenly
behind the LCD panel. The result is a uniform color range throughout the screen.
The technology also allows for thinner panels. IPS panels deliver a 178° wide
viewing angle and bright, clear images from most any location in the room, thereby
increasing the viewing angle.
Panasonic’s top of the line VIERA LED-LCD D2 series features two 1080p Full HD
models - TC-L37D2, a 37-inch class (37” measured diagonally) HDTV and the TC-
L42D2, a 42-inch class (41.6” measured diagonally) HDTV. The LED method of
backlighting the LCD panel allows for the HDTVs to become extremely thin and
offers a wider color gamut than traditional back-lit LCDs, which use fluorescent
bulbs to provide the light source. Combined with the IPS panel, the viewing angle is
improved, contrast is also improved and there is lower power consumption. The D2
series also features the proprietary Universal Dock for iPod®; the VIERA Image
Viewer™ to view digital still JPEG photos; VIERA Link™, - a technology that
utilizes HDMI-CEC (Consumer Electronics Control) and allows a consumer to
operate all VIERA Link™ compatible A/V components using only the TV’s remote
control; a PC input; 24p Smooth film; 120Hz motion picture Pro 4; four HDMI
connections and Clear Panel.

Slide # 9
LED Backlighting Techniques
LED Lights the Way to Better Images, Thinner TVs and Energy Savings.
Introducing LED edge-lit technology to the VIERA® 2010 LCD model line-up. Edge
lighting uses white LEDs arranged around the inside frame of the TV along with a special
diffusion panel designed to spread the light evenly behind the LCD panel. This method of
backlighting the LCD panel allows for the LED LCD HDTVs to become extremely thin and
offers a wider color gamut than traditional back-lit LCDs, which use fluorescent bulbs to
provide the light source. Combined with the IPS panel, the viewing angle is improved,
contrast is better and there is lower power consumption.
LED-backlit LCD TVs are considered a more sustainable choice, with a longer life and
better energy efficiency than plasmas and conventional LCD TVs. Unlike CCFL
backlights, LEDs also use no mercury in their manufacture. However, other elements
such as gallium and arsenic are used in the manufacture of the LED emitters themselves,
meaning there is some debate over whether they are a significantly better long term
solution to the problem of TV disposal in the environment.
Because LEDs are able to be switched on and off more quickly than CCFL displays and
can offer a higher light output, it is theoretically possible to offer very high contrast ratios.
They can produce deep blacks (LEDs off) and a high brightness (LEDs on), however care
should be taken with measurements made from pure black and pure white outputs, as
technologies like Edge-LED lighting do not allow these outputs to be reproduced
simultaneously on-screen.

Slide # 10
Others
High Picture Quality Smart Networking
×3
•Extremely thin
•Full HD (1080P)
•120Hz Motion Picture Pro4
•Wide Viewing Angle with IPS Alpha Panel
•Motion Focus Technology
•2,000,000:1 Dynamic Contrast with Intelligent
Scene Controller
•Fine Black Panel
•VIERA Image Viewer™ (JPEG)
•VIERA Link™
•Game Mode
•PC Input
•Universal Dock for iPod® Included*
•Lower Power Consumption
VIERA Image Viewer™
(JPEG)
2
3
4
120Hz Motion Picture Pro4
Wide Viewing Angle
with IPS Alpha Panel
TC-L37D2
TC-L42D2
*42
37
1LED Backlight
2010 D Series

Slide # 11
High Picture Quality Smart Networking
×3
•Full HD (1080P)
•120Hz Motion Picture Pro4 (TC-L42U25 Only)
•Motion Focus Technology (TC-L42U25 Only)
•Wide Viewing Angle with IPS Alpha Panel
•20,000:1 Dynamic Contrast with Intelligent
Scene Controller
•Fine Black Panel
•VIERA Image Viewer™ (JPEG)
•VIERA Link™
•Game Mode (TC-L42U25 Only)
•PC Input
1
2VIERA Image Viewer™
(JPEG)
Wide Viewing Angle
with IPS Alpha Panel
TC-L32U22
TC-L37U22
37
32
TC-L42U25, TC-L42U22
42
2010 U Series

Slide # 12
High Picture Quality Smart Networking
×3**
•HD (720P)
•Wide Viewing Angle with IPS Alpha Panel***
• 20,000:1 Dynamic Contrast with Intelligent
Scene Controller
• Fine Black Panel
• Universal Dock for iPod® Included*
• VIERA Image Viewer™ (JPEG)
• VIERA Link™
• Game Mode
• PC Input
1
2
3
VIERA Image Viewer™
(JPEG)
Universal Dock for iPod® Included*
VIERA Link™
TC-L32X2
TC-L37X2 TC-L22X2
TM
37 32 26
2010 X Series

Slide # 13
High Picture Quality Smart Networking
×2**
•HD (720P)
•Wide Viewing Angle with IPS Alpha Panel***
•18,000:1 Dynamic Contrast with Intelligent
Scene Controller
•Fine Black Panel
•VIERA Image Viewer™ (JPEG)
•VIERA Link™
•PC Input
1
2
VIERA Image Viewer™
(JPEG)
VIERA Link™
TC-L32C22
TC-L37C22
TM
37 32
2010 C Series

Slide # 14
Feature Comparison
FEATURES TC-L42D2
TC-L37D2 TC-L42U25 TC-L42U22
TC-L37U22
TC-L32U22
TC-L37X2
TC-L32X2
TC-L22X2
TC-L37C22
TC-L32C22
VIDEO
Panel IPS 1080p (WSXGA) IPS 1080p (WSXGA) IPS 1080p (WSXGA) IPS (WXGA) IPS (WXGA)
Backlight LED EEFL EEFL EEFL EEFL
Contrast (Dynamic) 2,000,000:1 20,000:1 20,000:1 20,000:1 18,000:1
Viewing Angle 178 degrees 178 degrees 178 degrees 178 degrees 178 degrees
120 Hz Y (Motion Picture Pro 4) Y (Motion Picture Pro 4) — — —
24p Smooth Film Y Y — — —
Motion Focus
Technology Y Y — — —
JACKS
Integrated ATSC
Tuner ATSC/QAM/NTSC ATSC/QAM/NTSC ATSC/QAM/NTSC ATSC/QAM/NTSC ATSC/QAM/NTSC
VIERA Image Viewer Y (JPEG playback) Y (JPEG playback) Y (JPEG playback) Y (JPEG playback) Y (JPEG playback)
HDMI Input 3 (1 side) 3 (1 side) 3 (1 side) 3 (1 side) 2
Audio Input (for Video) 2 (1 side) 2 (1 side) 2 (1 side) 2 (1 side) 2
PC Input 1 1 1 1 1
Digital Audio Output 1 (5.1 ch) 1 (5.1 ch) 1 (5.1 ch) 1 (5.1 ch) 1 (5.1 ch)
CONVENIENCE
VIERA Link Y Y Y Y Y
Universal Dock for
iPod Y — — Y —
VIERA Tools Y Y Y Y Y
Game Mode Y Y — Y —

Slide # 15
D Series
FHD U Series FHD X Series HD C Series
HD
TC-L42D2 TC-L42U25 TC-L37X2 TC-L37C22
TC-L37D2 TC-L42U22 TC-L32X2 TC-L32C22
TC-L37U22 TC-L22X2
TC-L32U22
Panasonic’s LED-LCD D2 series features two 1080p Full HD models - TC-L37D2, a 37-inch class (37”
measured diagonally) HDTV and the TC-L42D2, a 42-inch class (42.0" measured diagonally) HDTV. The
D2 series introduces LED-backlight technology to the 2010 model line-up. LED-LCD uses white LEDs
arranged around the inside frame of the TV along with a special diffusion panel designed to spread the
light evenly behind the LCD panel. This method of backlighting the LCD panel allows for the LED-LCD
HDTVs to become extremely thin and offers a wider color gamut than traditional back-lit LCDs, which use
fluorescent bulbs to provide the light source. Combined with the IPS panel, the viewing angle is enhanced,
contrast is also improved and there is lower power consumption. The D2 series also features the
proprietary Universal Dock for iPod; the VIERA Image Viewer™ to view digital still JPEG photos with
music slideshow capability; VIERA® Link™, - a technology that utilizes HDMI-CEC (Consumer Electronics
Control) and allows a consumer to operate all VIERA Link compatible A/V components using only the TV’s
remote control; a PC input; 24p Smooth film; 120Hz Motion Picture Pro 4; four HDMI connections and
Clear Panel.
2010 Series Description

Slide # 16
Panasonic’s TC-L42U25, a 42-inch class (42.0" measured diagonally) HDTV, is a 1080p Full HD
Resolution HDTV whose features include 120 Hz Motion Picture Pro 4; 24p Smooth film; VIERA
Image Viewer to view digital still JPEG images; VIERA Link; three HDMI connections and a PC input.
The LCD U22 series presents three screen sizes – the TC-L42U22, a 42-inch class (42.0” measured
diagonally) HDTV; the TC-L37U22, a 37-inch class (37” measured diagonally) HDTV and the TC-
L32U22, a 32-inch class (31.5” measured diagonally) HDTV. The U22 series of LCD HDTVs features
1080p Full HD Resolution; VIERA Image Viewer to view digital still JPEG images; VIERA link; three
HDMI connections and a PC Input.
Panasonic’s increased LCD line-up for 2010 continues its expansion with three additional model lines,
all with 720p lines of resolution. The LCD X2 series includes the Universal Dock for iPod in its three
screen sizes and introduces a new 22-inch screen size – TC-L37X2, a 37-inch class (37”measured
diagonally) HDTV; TC-L32X2, a 32-inch class (31.5” measured diagonally) HDTV and TC-L22X2, a
22-inch class (21.6” measured diagonally), HDTV. In addition to the Universal Dock for iPod, the X2
models include the VIERA Image Viewer to view digital still JPEG images; VIERA Link; three HDMI
connections and a PC Input. Improvements to iPod Dock make it easier to use with iPhone and iPod
Touch. TC-L32X2 and TC-L22X2 feature Clean Touch bezel, designed to keep the TV bezel looking
best with less fingerprints.
The LCD C22 series consists of two screen sizes – the 37-inch class (37” measured diagonally) TC-
L37C22 and the 32-inch class (31.5” measured diagonally TC-L32C22. Both are 720p HDTVs and
feature VIERA Image Viewer to view digital still JPEG images; VIERA Link; two HDMI inputs and a
PC input
2010 Series Description Continued

Slide # 17
Board Name Function
A-Board Rear Terminal, AV Switch, MCU, Audio & Video Processor, LVDS,
Tuner
V-Board Remote Receiver, LED
P-Board Power (AC/DC), DC-DC
Control Panel Assembly Control Button, Power switch, (K BOARD)
TC-L37U22 Board Layout
PA
LVDS
P2
P１
P6
A03 A22
A11
A04 A10
V Key scan
To Speaker
STB5V
Sound15V
DTV 12V
SUB ON
Inverter_ON
INV_SOS
V10
P5
To
FL
Power LED
Remote RX
Control
Panel
ASSY
K

Slide # 18
TC-L37D2 Board Layout
PA
P2
CNAC
A21
A03
A11 A04 A10
Key scan To Speaker
STB5V
Sound15V
F15V
SUB ON
Backlight ON
SOS
CN01
To LED backlight
Control
Panel
Assy TC
CN02
TC05TC06
TC04 TC01
PWM LVDS
V
To Panel Control
V10 Power LED, Remote receiver
K
K1

Slide # 19
Board Name Function
A-Board Speaker out, AV Terminal, HDMI in, SD Card, PC in, iPod
Digital Signal Processor, Nile-Tcon, Tuner, Non Serviceable
V-Board Remote Receiver, LED
TC-Board T-CON, Non Serviceable
P-Board Power (AC/DC), DC-DC
Non serviceable
P-Board should be exchanged for service.
Control Panel
Assembly Control Button, Power switch
Non serviceable
Control Panel Assembly should be exchanged for service.
TC-L37D2 Board Layout
P BOARD A BOARD
TC BOARD

Slide # 20
TC-L37D2 P-Board Pictorial
Non serviceable
1. Power (AC/DC), DC-DC
2. P-Board should be exchanged for
service.
LED POWER
CONNECTOR _DC OUPUT _COMMAND_IN
AC INPUT