Toshiba 26EL834G User manual

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SERVICE MANUAL
LCD Color Television
26EL834G Ver. 1.00
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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.
IMPORTANT NOTICE
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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.
GREEN PRODUCT PROCUREMENT
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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 86ºF to 104ºF (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.
LEAD-FREE SOLDER
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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 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. Touch current check. (After completing the work, measure touch current to prevent an electric shock.)
Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer for this check.
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.
SAFETY INSTRUCTION
Annex D
(normative)
Measuring network for TOUCH CURRENTS

The potential at any point (TOUCH CURRENT) expressed as voltage and does not exceed the following value:
Resistance values in orms (Ω).
Input resistance : 1 MΩ
Input capacitance : 200 pF
Frequency range : 15 Hz to 1 MHz and d.c. respectively
Note: Appropriate measures should be taken to obtain the correct value in case of non sinusoidal waveforms.
The measuring instrument is calibrated by comparing the frequency factor of with the solid line in figure F.2 of IEC 60990 at various frequencies. A calibration curve is constructed showing the deviation
of from the ideal curve as a function of frequency.
TOUCH CURRENT = / 500 (peak value).
V: Voltmeter or oscilloscope
(r.m.s. or peak reading)
The part or contact of a TERMINAL is not HAZARDOUS LIVE if:
Note: The limit values of = 0.35 V (peak) for a.c. and = 1.0 V for d.c. correspond to the values 0.7 mA (peak) a.c. and 2.0 mA d.c.
a) The open-circuit voltage should not exceed 35 V (peak) a.c. or 60 V d.c. or, if a) is not met.
b) The measurement of the TOUCH CURRENT shall be carried out in accordance with IEC 60990, with the measuring network described in Annex D of this standard.
The TOUCH CURRENT expressed as voltages and , does not exceed the following values:
- for a.c. : = 35 V (peak) and = 0.35 V (peak);
- for d.c. : = 1.0 V
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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.
SAFETY INSTRUCTION
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Handling the LCD Module
Safety Precaution
In the event that the screen is damaged or the liquid crystal (fluid) leaks, do not breathe in or drink this fluid.
Also, never touch this fluid. Such actions could cause toxicity or skin irritation. If this fluid should enter the mouth, rinse the mouth thoroughly with water. If the fluid should contact the skin or clothing, wipe off with
alcohol, etc., and rinse thoroughly with water. If the fluid should enter the eyes, immediately rinse the eyes thoroughly with running water.
Precautions for Handling the LCD Module
CAUTION: The metal edges of the LCD module are sharp, handle it with care.
The LCD module can easily be damaged during disassembly or reassembly; therefore, always observe the following precautions when handling the module.
1. When attaching the LCD module to the LCD cover, position it appropriately and fasten at the position where the display can be viewed most conveniently.
2. Carefully align the holes at all four corners of the LCD module with the corresponding holes in the LCD cover and fasten with screws. Do not strongly push on the module because any impact can adversely
affect the performance. Also use caution when handling the polarized screen because it can easily be damaged.
3. If the panel surface becomes soiled, wipe with cotton or a soft cloth. If this does not remove the soiling, breathe on the surface and then wipe again.
If the panel surface is extremely solied, use a CRT cleaner as a cleaner. Wipe off the panel surface by drop the cleaner on the cloth. Do not drop the cleaner on the panel. Pay attention not to scratch the panel
surface.
SAFETY INSTRUCTION

4. Leaving water or other fluids on the panel screen for an extended period of time can result in discoloration or stripes. Immediately remove any type of fluid from the screen.
5. Glass is used in the panel, so do not drop or strike with hard objects. Such actions can damage the panel.
6. CMOS-LSI circuitry is used in the LCD module, so avoid damage due to static electricity. When handling the module, use a wrist ground or anchor ground.
7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an extended period of time.
8. Do not store the LCD module below the temperature conditions described in the specifications. Failure to do so could result in freezing of the liquid crystal due to cold air or loss of resilience or other damage.

9. Do not disassemble the LCD module. Such actions could result in improper operation.
10. When transporting the LCD module, do not use packing containing epoxy resin (amine) or silicon resin (alcohol or oxim). The gas generated by these materials can cause loss of polarity.
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P201 P202 CN1 CN12
1 24V 1 12V 1 +12V_NORMAL 1 PANEL_VCC 2 24V 2 12V 2 +12V_NORMAL 2 PANEL_VCC 3 24V 3 12V 3 +12V_NORMAL 3 PANEL_VCC 4 24V 4 GND 4 GND 4 PANEL_VCC 5 24V 5 GND 5 GND 5 OD_OCP_SEL 6 GND 6 GND 6 GND 6 PANEL_VCC 7 GND 7 5VSB 7 +5V_Standby 7 RXE4+ 8 GND 8 5VSB 8 +5V_Standby 8 GND 9 GND 9 5VSB 9 +5V_Standby 9 RXE3+
10 GND 10 ACD 10 ACDetect 10 RXE4- 11 BRIGHT_ADJ 11 BD_PS_ON 11 BD_POWER_ON 11 RXEC+ 12 INV_ON_OFF 12 BRIGHT_ADJ 12 OCP_OUTPUT_PWM 12 RXE3-
13 INV_ON_OFF 13 INVERTER_ON_OFF 13 GND 14 PS_ON 14 STANDBY 14 RXEC-
15 RXE2+ 16 GND 17 RXE1+ 18 REX2- 19 REX0+ 20 REX1- 21 GND 22 REX0- 23 RXO4+ 24 GND 25 RXO3+ 26 RXO4- 27 RXOC+ 28 RXO3- 29 GND 30 RXOC- 31 RXO2+ 32 GND 33 RXO1+ 34 RXO2- 35 RXO0+ 36 RXO1- 37 GND 38 RXO0- 39 BRIGHT_ADJ 40 OCP_OUTPUT_PWM
CN2
1 +5V_Standby 2 KEY0 3 KEY1 4 GND CN11 5 IRIN 1 SPK_R- 6 LED_ON_OFF 2 SPK_R+ 7 LED_TIMER 3 SPK_L- 8 GND 4 SPK_L+
CN202 CON1
1 +5V_STBY 1 KEY2 2 GND 2 KEY1 3 RC_IR 3 GND 4 GND 4 GND 5 LED_ON_OFF 6 LED_TIMER
IR_LED BORAD
Speaker
MAIN BOARD
PSU Unit
PANEL (T-CON)
PANEL_INVERTER
KEY BORAD
Speaker

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UNDER CONSTRUCTION
Note: Please check back in the future.
TROUBLESHOOTING GUIDE
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Firmware Upgrade - USB
1. Copy a firmware BIN file to USB disk. (Root directory)
2. Plug USB disk into TV USB port.
3. Reboot (AC Off/On) TV to upgrade firmware automatically. During firmware upgrade, OSD will be displayed on LCD screen, and power status LED will be blinking.
4. When firmware upgrade is finished, a message will be displayed on screen.
5. Unplug USB disk, and turn AC Off/On to reboot TV.
Note:
This upgrade method is available only when boot code exists in flash memory (Main Board).
FIRMWARE UPDATING PROCEDURE

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Global Serial No.
㪫㫆㫋㪸㫃㩷㪻㫀㪾㫀㫋㫊㪰㪮㪢㪤㫆㪻㪼㫃㪶㪠㪛㪪㪜㪩㪠㪘㪣㪧㪸㫅㪼㫃㪤㪸㫏㩷㪈㪋㪰㪮㪢㫏㫏㫏㪁㪁㪁㪁㪁㪁㪁㪁㪊㩷㪻㫀㪾㫀㫋㫊㪊㩷㪻㫀㪾㫀㫋㫊㪍㩷㪻㫀㪾㫀㫋㫊㪉㪻㫀㪾㫀㫋㫊㩿㪤㪇㪇㪇㪇㪈㫕㪤㪐㪐㪐㪐㪐㪀㪬㪥㪠㪟㪘㪥㪬㪪㪘㪄㪚㪿㫀㫅㪸㪄㪘㫊㫀㪸㩷㪄㪜㪬㪢㪇㪈㪄㪣㪐㪐㪦㫋㪿㪼㫉㪄Ｙ：Year 8 2008 Panel vendor and version for the model.
9 2009
A 2010 Marking Marking Marking B 2011 A J S
C 2012 B K T
…
…
CLU
WK䋺Week 01 WK01 D M V
02 WK02 E N W 03 WK03 F P X 04 WK04 G Q Y
…
…
H R Z
53 WK53
Model Information
L1 L1 L1 L1 L1 L1 L1 L1
K84 K79
LC320EUN-SDV1 LC320EUN-SDV1 LC420EUN-SDV1 LC420EUN-SDV1
LC260EXN-SDA3 LC260EXN-SDA3 LC260EXN-SDA3 LC260EXN-SDA3
Panel ID Panel
L1 LC260EXN-SDA3K73
Model ID
K80 K82 K81 K78 K83 K77
42HL834G
42HL834R
32EL834G
32EL834R
32HL834G
32HL834R
Model
26EL834G
26EL834RB
32EL834B
Panel Vendor
AUO
CMO
Panel Vendor
SAMSUNG
LPL/LGD
CPT
IPS
Panel Vendor
SHARP

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Whenever replacing the Main PCB with new one, perform this procedure.
1. Press "Mute" key twice on the Remote.
2. Press "Menu" button on the TV set. Then the OSD is displayed.
3. Move to Tag "3" by Right/Left Arrow key on the Remote.
4. Select "Model Type" cell.
5. Select the appropriate model type by Right/Left Arrow key on the Remote. Model type is written on the rating label.
DESTINATION SETTING CHANGE

6. Select "Reset to Def".
7. Select "Yes" and press "OK" button on the Remote.
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Precaution
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE".
CAUTION: The international hazard symbols " " in the schematic diagram and the parts list designate components which have special characteristics important for safety and should be replaced
only with types identical to those in the original circuit or specified in the parts list.
The mounting position of replacements is to be identical with originals.
Before replacing any of these components, read carefully the "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE".
Do not degrade the safety of the receiver through improper servicing.
Note:
The part number must be used when ordering parts, in order to assist in processing, be sure to include the Model number and Description.
The PC board assembly with mark is no longer available after the end of the production.
Abbreviations
All CD and PF capacitors are ±5 %, 50 V and all resistor, ±5 %, 1/6 W unless otherwise noted.
PARTS LIST
Capacitors CD : Ceramic Disk
Resistors CF : Carbon film
OMF : Oxide Metal Film
PF : Plastic Film
CC : Carbon Composition
VR
: Variable Resistor
EL : Electrolytic
MF : Metal Film
FR : Fusible Resistor
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PARTS LIST
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Location Parts No. Description
E200 75025242 PC BOARD ASSY, MAIN, 26EL833, 9C-EB40M0010
E250 75025229 POWER OPENFRAME, 88W/+5 12 24V, 0433-005E000
E260 75025210 PC BOARD ASSY, KEY, 90-EB40S01D0
E270 75025211 PC BOARD ASSY, IR, 90-EB40S01A0
E300 75023140 LCD PANEL, LC260EXN-SDA3
E310 75025243 LVDS CABLE, 30P TO 40P L:300MM, 1414-05B0000
E320 75025213 POWER CORD, EU/2P BLACK L:1.8M, 1411-00WA000, F/G/N/R/RB
E330 75025192 SPEAKER, 10W 8 OHM L+R, 04A4-00SK000
E340 75025246 CABLE, SPEAKER, 2P TO 2P L:70MM, 1419-001N000
E342 75025248 CABLE, INVERTER, 14P TO 12P L:210MM, 1410-0082000
E344 75025250 CABLE, POWER, HSG 14P TO 14P, 1414-05BD000
E346 75025252 CABLE, POWER, 2P INLET-HSG 4P, 1414-05BG000
E348 75025255 CABLE, Y, 8P TO HSG 3+5P, 1414-05BF000
E400 75014827 REMOCON HAND UNIT, CT-90326
E410 75025271 MANUAL, 1506-0GKK000, G
E100 75026728 FRONT BEZEL ASSY, 26EL834, 13EB-2WB1401
E110 75026730 BACK COVER ASSY, 26EL834, 13EB-2WB0Z01
E125 75025238 SCREW, FOR STAND ASSY, 26EL833, 13EB-2WB0B01
E140 75026732 PLATE, SIDE IO, 26EL834, 13EB-2WQ1601
E155 75025209 SCREW, BRACKET ASSY, 9C-EB40S00D0
E190 75025228 MYLAR, 13EB-2VL0311
E500 75026734 CARTON BOX, 26EL834, 1503-03HA000
E510 75025257 EPS CUSHION, TOP RIGHT, 26EL833, 1505-01WD000
E511 75025258 EPS CUSHION, TOP LEFT, 26EL833, 1505-01WC000
E512 75025259 EPS CUSHION, BOTTOM RIGHT, 26EL833, 1505-01WE000
E513 75025260 EPS CUSHION, BOTTOM LEFT, 26EL833, 1505-01WF000
E520 75025261 EPE BAG, 26EL833, 1516-0103000
E530 75025262 PE BAG, STAND, 26EL833, 1516-01AL000
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