Toshiba 50L3400U User manual

SERVICE MANUAL
LCD Color Television
50L3400U/UM/UCseries

CONTENTS
1. IMPORTANT NOTICE
2. GREEN PRODUCT PROCUREMENT
3. LEAD-FREE SOLDER
4. SAFETY INSTRUCTION
5. FIRMWARE UPDATING
6. INTERCONNECT
7. EXPLODED VIEW
8. FACTORY MODE
1

IMPORTANT NOTICE
WARNING:
You are requested that you shall not modify or alter the information or data provided
herein without prior written consent by Toshiba. Toshiba shall not be liable to
anybody for any damages, losses, expenses or costs, if any, incurred in connection
with or as a result of such modification or alteration.
THE INFORMATION OR DATA HEREIN SHALL BE PROVIDED "AS IS" WITHOUT ANY
WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED WARRANTY OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Toshiba shall not be liable for any damages, losses, expenses or costs, if any,
incurred in connection with or as a result of use of any information or data provided
herein.

GREEN PRODUCT PROCUREMENT
The EC is actively promoting the WEEE & RoHS Directives that define standards for
recycling and reuse of Waste Electrical and Electronic Equipment and for the Restriction of
the use of certain Hazardous Substances. From July 1, 2006, the RoHS Directive will
prohibit any marketing of new products containing the restricted substances.
Increasing attention is given to issues related to the global environmental. Toshiba
Corporation recognizes environmental protection as a key management tasks, and is doing
its utmost to enhance and improve the quality and scope of its environmental activities. In
line with this, Toshiba proactively promotes Green Procurement, and seeks to purchase
and use products, parts and materials that have low environmental impacts.
Green procurement of parts is not only confined to manufacture. The same green parts
used in manufacture must also be used as replacement parts.
LEAD-FREE SOLDER
This product is manufactured using lead-free solder as a part of a movement within the
consumer products industry at large to be environmentally responsible. Lead-free solder
must be used in the servicing and repair of this product.
WARNING: This product is manufactured using lead free solder.
DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT!
The melting temperature of lead-free solder is higher than that of leaded solder by 54ºF to
72ºF (30ºC to 40ºC). Use of a soldering iron designed for lead-based solders to repair
product made with lead-free solder may result in damage to the component and or PCB
being soldered. Great care should be made to ensure high-quality soldering when servicing
this product especially when soldering large components, through-hole pins, and on PCBs
as the level of heat required to melt lead-free solder is high.

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SAFETY INSTRUCTION
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY
PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.
Safety Precaution
WARNING: SERVICING SHOULD NOT BE ATTEMPTED BY ANYONE UNFAMILIAR
WITH THE NECESSARY PRECAUTIONS ON THIS RECEIVER. THE FOLLOWING ARE
THE NECESSARY PRECAUTIONS TO BE OBSERVED BEFORE SERVICING THIS
CHASSIS.
1. An isolation transformer should be connected in the power line between the receiver
and the AC line before any service is performed on the receiver.
2. Always disconnect the power plug before any disassembling of the product. It may
result in electrical shock.
3. When replacing a chassis in the cabinet, always be certain that all the protective
devices are put back in place, such as nonmetallic control knobs, insulating covers,
shields, isolation resistor-capacitor network, etc.
4. Always keep tools, components of the product, etc away from the children, These
items may cause injury to children.
5. Depending on the model, use an isolation transformer or wear suitable gloves when
servicing with the power on, and disconnect the power plug to avoid electrical shock
when replacing parts. In some cases, alternating current is also impressed in the
chassis, so electrical shock is possible if the chassis is contacted with the power on.
6. Always use the replacement parts specified for the particular model when making
repairs. The parts used in products require special safety characteristics such as
inflammability, voltage resistance, etc. therefore, use only replacement parts that
have these same characteristics. Use only the specified parts when the mark is
indicated in the circuit diagram or parts list.
7. Parts mounting and routing dressing of wirings should be the same as that used
originally. For safety purposes, insulating materials such as isolation tube or tape are
sometimes used and printed circuit boards are sometimes mounted floating. Also
make sure that wirings is routed and clamped to avoid parts that generate heat and

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which use high voltage. Always follow the manufactured wiring routes / dressings.
8. Always ensure that all internal wirings are in accordance before re-assembling the
external casing after a repairing completed. Do not allow internal wiring to be
pinched by cabinets, panels, etc. Any error in reassembly or wiring can result in
electrical leakage, flame, etc., and may be hazardous.
9. NEVER remodel the product in any way. Remodeling can result in improper
operation, malfunction, or electrical leakage and flame, which may be hazardous.
10. Always perform an AC leakage current checking on the exposed metallic parts of the
cabinet such as antennas, terminals, screw heads, metal overlays, control shafts
and etc. to be sure that the set is safe to operate without any dangerous of electrical
shocks before returning the set to the customer.
11. The leakage current checking. (After completing the work, measure the leakage
current to prevent an electrical shock.)
 Plug the AC line cord directly into a 120V AC outlet. Do not use an isolation
transformer for this check.
 Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following
manner.
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15 µF, AC type capacitor, between
a known good earth ground (water pipe, conduit, etc.) and the exposed metallic parts, one
at a time. Measure the AC voltage across the combination of 1500 ohm resistor and 0.15
µF capacitor. Reverse the AC plug at the AC outlet and repeat AC voltage measurements
for each exposed metallic part. Voltage measured must not exceed 0.3 volts rms. This
corresponds to 0.2 milliamp. AC. Any value exceeding this limit constitutes a potential
shock hazard and must be corrected immediately.

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Product Safety Notice
Many electrical and mechanical parts in this chassis have special safety-related
characteristics. These characteristics are often passed unnoticed by a visual inspection and
the protection afforded by them cannot necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement parts which have these
special safety characteristics are identified in this manual and its supplements; electrical
components having such features are identified by the international hazard symbols on the
schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The
use of substitute replacement parts which do not have the same safety characteristics as
specified in the parts list may create electrical shock, fire, or other hazards.

FIRMWARE INSTALLATION NOTICE
TOSHIBA LED TV MODELS **L3400U/UM & **L3460U/UM Model Series
The installation process is simple; however, please read all of the following instructions and notices prior to installation. This firmware
update is intended solely for use with the TOSHIBA Models indicated above.
Notice (Read Prior to Beginning the Firmware Upgrade)
The following events may interrupt the upgrade process and result in an inoperative unit.
1) Only unplug the AC Power Cord when instructed during the firmware upgrade procedure.
2) Avoid loss or interruption of power during the firmware upgrade procedure.
3) DO NOT Press the power button on the unit, unless instructed by the firmware upgrade procedure.
If you are experiencing problems or have further questions:
Customers should contact Toshiba Customer Service at 800-631-3811.
Toshiba Authorized Service Providers should contact Toshiba Technical Support Group.
Prior to using this installation procedure, the correct firmware must be provided on a USB drive by Toshiba or
downloaded to a USB drive from an Authorized Toshiba website. Do not alter the file or folder structures.
Download Procedure
1) Use a USB Mass Storage Device (USB Flash Drive) that has been formatted to “FAT32”.
2) Copy the following (2) files to the root directory of the USB Mass Storage Device
•L3400.meta
•L3400_8.2.xx.xx.xx.1.fwu (“8.2.xx.xx.xx.1” is the FW Version)
Update Procedure
NOTE: Some personal settings and preferences may need adjusted upon completion of this upgrade. Please
note any personal settings or preferences prior to proceeding to the firmware upgrade.
1) Power the TV “On”and wait for the TOSHIBA logo to appear as shown in Figure 1. Wait until the picture is
displayed on the screen.
Figure 1
!

2
2) Insert the USB Flash Drive into the USB Port 1 of the TV. This port is located on the side of the TV receiver as
shown in Figure 2.
Figure 2
3) After the following message appears, select “Yes” with Left/Right key, and push “OK” key to start FW upgrade.
Shown in Figure 3 below. NOTE: This message may not appear if the TV was using a network function at
the time the USB Flash Drive was connected. In this case, please select the ANT/CABLE input and then
remove and reconnect the USB Flash Drive.
Figure 3

3
4) Next, the following message appears to enable users to select their preferred behavior after the SW upgrade is
complete. If you want the TV to reboot automatically after FW upgrade, select “Yes”. If you want the TV to go to
standby after the SW update, select “No”. Shown in Figure 4 below.
Figure 4
5) Next, the following message will be displayed as shown in Figure 5.
WARNING: Do not unplug the TV.
Figure 5

4
6) Next a status screen will display as shown in Figure 6. DO NOT POWER OFF OR PRESS ANY KEY ON THE
REMOTE CONTROL UNTIL AFTER COMPLETION OF THE UPDATE!!! DO NOT REMOVE USB FLASH
DRIVE UNTIL INSTRUCTED!!!
Figure 6
7) Once the firmware update is complete the TV will display the message shown in Figure 7 below. The TV will
then go to Standby or reboot according to the user setting selected in Step 4.
Figure 7
8) Remove the USB Flash Drive from the TV.
9) The firmware update procedure is now complete.
TOSHIBA AMERICA INFORMATION SYSTEMS INC
9740 Irvine Blvd.
Irvine, CA. 92618
http://support.toshiba.com
2013 Toshiba America Information Systems Inc. Firmware Update 2014

Wiring Diagram
CN4 P803
CN2 1RXE4+ 1LED2+
13.3V_Standby 13.3V_Standby 2 RXE4- 2LED1+
2IRR 2IRR 3 RXE3+ 3LED3+
LED/IR board
Panel module
3GND 3GND 4 RXE3- 4LED4+
4MI2C-SCL 4MI2C-SCL 5 RXEC+ 5NC
5MI2C-SD
A
5MI2C-SD
A
6RXEC- CN5 P802 6NC
63.3V_Normal 63.3V_Normal 7 RXE2+ 1 12V_NORMAL 1 12V2 7 NC
7PWM1 73.3V_Standby 8 RXE2- 2 12V_NORMAL 2 12V2 8 NC
8PWM1 9 RXE1+ 3 12V_NORMAL 3 12V2 9 LED4-
9GND 10 RXE1- 4 GND 4 GNDP 10 LED3-
11 RXE0+ 5 GND 5 GNDP 11 LED2-
12 RXE0- 6 GND 6 12VA 12 LED1-
13 GND 7 GND 7 GND_12VA
14 GND 8 N.C 8 12V2
15 GND 9 GND 9 GNDP
16 GND 10 5V_Standby 10 5V1
17 GND 11 PG 11 ACD
WiFi
CN3 18 GND 12 POWER_EN 12 PWON
15V 15V 19 LVDS_PWR 13 BKLT_EN 13 BLON
2USB_DM 2USB_DM 20 LVDS_PWR 14 5V_Standb
y
14 5V1
3USB_DP 3USB_DP 21 LVDS_PWR 15 BL_CNTRL 15 DIM
4WAKE_UP 4WAKE_UP 22 LVDS_PWR
5GND 5GND 23 LVDS_PWR
24 LVDS_PWR
25 GND
26 GND
27 GND
28 LVDS_SEL
CN6 29 RXO4+
4SPK_OUTL+ 30 RXO4-
3SPK_OUTL- 31 RXO3+ P801
Speaker(L)
WiFi
2SPK_OUTR- 32 RXO3-
1SPK_OUTR+ 33 RXOC+
34 RXOC-
35 RXO2+
36 RXO2-
37 RXO1+
38 RXO1-
39 RXO0+
40 RXO0-
Main board
Power board
Speaker(R)

FACTORY MODE
Entering into factory Mode:
Timer Clear:
Reset the timer which records hours of LCD panel burn in.
In tuner mode, press “◄” key, next press “EXIT” key, then press “ENTER” key on the remote
control to enter factory mode.

Exploded View
50L3400U/50L3400UC/50L3400UM
Location
Compal
Component
Part
Toshiba
Service
Part
Description
1E260 454C4Z51L01 75037556 PC BOARD ASSY, IR/B
2E200 461C7751L01 75038342 PC BOARD ASSY, MAIN
3E300 -75037577 LCD PANEL, V500HJ1-ME1
4E330 CG100800Y0I 75037561 SPEAKER
5E272 DC02A00720I 75037892 H-CON SET, MB-SPK
6E310 DC02L01550I 75037896 H-CON SET, LVDS
7E274 DC02P03140I 75037893 H-CON SET, MB-POWER
8E279 DC02V05880I 75037895 H-CON SET, MB-WIFI
9E278 DC02V06210I 75037894 H-CON SET, MB-IR
10 PK101W0350I 75037554 POWER MODULE
11 PK101W0480I 75037555 POWER MODULE
12 E290 PK29A00000I 75037883 WIFI MODULE
13 E165 AMRP50T030I 75037891 BRAKET, MAIN
14 E110 39C0FY51L01 75037889 UNITCOVER ASSY
21 E102 APRP50T020I 75037570 DECO PLATE ASSY
22 E130 39C0FY51L02 75038342 KEY PLATE ASSY
23 E320 GA05009080I 75036667 POWER CORD
24 E400 PK11V02040I 75037885 REMOCON HAND UNIT
25 E160 AMRP50T010I 75037550 BRACKET ASSY, STAND, LEFT
26 E162 AMRP50T020I 75037551 BRACKET ASSY, STAND, RIGHT
27 E120 APRP50T040I 75037571 BASE ASSY, STAND
E250
SAFETY PRECAUTION
The parts identified by mark are critical for safety. Replace only
with part number specified. The mounting position of replacement is
to be identical with originals.
The substitute replacement parts which do not have the same safety
characteristics as specified in the parts list may create shock, fire or
other hazards.

SET ID and PANEL ID
Total digits YWK SET ID SERIAL Panel ID
Max 14 YWK *** ****** **
3 digits 3 digits
6 digits 2 digits
(A00001-Z99999)
YWK
Y: Year 82008 WK: Week 01 WK01
92009 02 WK02
A2010 03 WK03
B2011 04 WK04
C2012
…
…
…
…
53 WK53
Panel vendor Information (Panel ID)
Marking Marking Marking
A J S
B K T
C L U
D M V
E N W
F P X
G Q Y
H R Z
1-9
Model/Panel Information
50L3400U
284
50L3400UC
50L3400UM
C1 V500HJ1-ME1
When the panel version is updated within the same panel vendor, the last digit will be
incremented by 1.
Panel ID
Panel
Model
SET ID
IPS
14th digit:
Panel Vendor
SHARP
Panel Vendor
SAMSUNG
LPL/LGD
Panel ID in Global Serial No.
13th digit:
Panel Vendor
AUO
BriView
INX(CMI)
(Open Cell)
CPT

REV. 04
05_13_2014