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LCD Television
Service Manual


Chassis MT5651HROI+MST6M40A




Product TypeLTDN50K3801UWTRULTDN50XT880XWT3D(1)




Ver 1.0
Hisense Electric Co.Ltd.



December2014
Contents
Contents .......................................................................................................................................................................- 2 -
Service Manual ...........................................................................................................................................................- 3 -
1. Precautions and notices.....................................................................................................................................- 3 -
1.1 Warning...................................................................................................................................................- 4 -
1.2 Notes .......................................................................................................................................................- 7 -
2. Product Function Specifications .......................................................................................................................- 9 -
3. Factory/Service OSD Menu and Adjustment ..................................................................................................- 17 -
3.1 To enter the Factory OSD Menu ...........................................................................................................- 17 -
3.2 Factory OSD Menu ...............................................................................................................................- 17 -
3.3 Designer Menu......................................................................................................................................- 20 -
4. Software Upgrading ........................................................................................................................................- 20 -
Before upgrading, read the following. ........................................................................................................- 20 -
4.1 USB Software Upgrading directly ........................................................................................................ - 20 -
4.2 USB upgrading failure ..........................................................................................................................- 21 -
4.3 Upgrading with the FlashTool0.6.0.exe ................................................................................................- 23 -
4.4 Network updating .................................................................................................................................- 26 -
5. Trouble shooting .............................................................................................................................................- 31 -
5.1 Troubleshooting for Remote Control ....................................................................................................- 32 -
5.2 Troubleshooting for Function Key ........................................................................................................- 33 -
5.3 TV won't Power On ..............................................................................................................................- 34 -
5.4 Troubleshooting for Audio ....................................................................................................................- 35 -
5.5 Troubleshooting for TV/VGA/HDMI input..........................................................................................- 36 -
5.6 Troubleshooting for YPbPr input ..........................................................................................................- 37 -
5.7 Troubleshooting for Video input ...........................................................................................................- 38 -
6. Signals Block Diagram and power assign: .....................................................................................................- 38 -
7. Schematic circuit diagram ..............................................................................................................................- 38 -
8. Explode View..................................................................................................................................................- 38 -




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Service Manual
1. Precautions and notices

BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN

THIS MANUAL.

USE ONLY MANUFACTURER SPECIFIED REPLACEMENT PARTS WHEN

SERVICING.

USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S

WARRANTY



Proper service and repair is important to the safe, reliable operation of all Hisense

Equipment. The service procedures recommended by Hisense and described in this

Service Guide are effective methods of performing service operations. Some of these

service operations require the use of tools specially designed for the purpose. The special

tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES

which should be carefully read in order to minimize the risk of personal injury to service

personnel. The possibility exists that improper service methods may damage the

equipment and pose risk of personal injury

. It is also important to understand that these CAUTIONS and NOTICES ARE NOT

EXHAUSTIVE. Service should only be performed by an experienced electronics



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techician trained in the proper Television safety and service methods and procedures

Hereafter throughout this manual, HISENSE will be referred to.


1.1 Warning

1.1.1

Critical components having special safety characteristics are identified with a by the

Ref. No. in the parts list. Use of non-manufacturer's recommended parts may create

shock, fire, or other hazards.Under no circumstances should the original design be

modified or altered without written permission from RCA. Hisense Eassumes no liability,

express or implied, arising out of any unauthorized modification of design. Servicetech

assumes all liability.

DANGER CAUTION

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY
ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH
THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE GUIDE.




1.1.2.

All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD).

Careless handling during repair can reduce life drastically. When repairing, be sure to

use anti-static table mats and properly use a grounding wrist stra. Keep components and

tools also at this same potential.




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IMPORTANT:

Always disconnect the power cord from AC outlet before replacing parts or modules.

1.1.3

To prevent electrical shock, use only a properly grounded 3 prong outlet or extension

cord.

1.1.4

When replacement parts are required, be sure to use replacement parts specified by the

manufacturer or have the same characteristics as the original part. Unauthorized

substitutions may result in fire, electric shock, or other hazards and will void the

manufacturer's warranty.

1.1.5

Safety regulations require that after a repair the set must be returned in its original

condition. In addition, prior to closing set, check that:

-Note:

>All wire harnesses and flex cables are properly routed and secured with factory tape

and/or mounted cable clamps.

> All cables and connectors are properly insulated and do not have any bare wires/lead

exposed



1.1.6

(1) Do not supply a voltage higher than that specified to this product. This may



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damage the product and may cause a fire.

(2) Do not use this product:

> High humidity areas

> In an area where any water could enter or splash into the unit.

High humidity and water could damage the product and cause fire.

(3) If a foreign substance (such as water, metal, or liquid) gets inside the panel

module, immediately turn off the power. Continuing to use the product may cause fire

or electric shock.

(4) If the product emits smoke, and abnormal smell, or makes an abnormal sound,

immediately turn off the power. Continuing to use the product, it may cause fire or

electric shock.

(5) Do not pull out or insert the power cable from/to an outlet with wet hands. It may

cause electric shock.

(6) Do not damage or modify the power cable. It may cause fire or electric shock.

(7) If the power cable is damaged, or if the connector is loose, do not use the product:

otherwise, this can lead to fire or electric shock.

(8) If the power connector or the connector of the power cable becomes dirty or dusty,

wipe it with a dry cloth. Otherwise, this can lead to fire.

(9) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer,

or sold with the apparatus. When a cart is used, use caution when moving the

cart/apparatus combination to avoid injury from tip-over



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1.2 Notes

Notes on Safe Handling of the LCD panel and during service

The work procedures shown with the Note indication are important for ensuring the

safety of the product and the servicing work. Be sure to follow these instructions.