Noblex 91DK65X9500 User manual

LCD Television
Service Manual
Chassis： MT9602
Version:
● V 1.00
Hisense Visual Technology Co., Ltd.
●󰾡
March 27, 2020

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REVISION HISTORY
Version Revise content Reviser Date
V1.00 First issued 2020-6-17

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Contents
。
Contents ....................................................................................................................................................................... - 3 -
Service Manual ........................................................................................................................................................... - 4 -
1. Precautions and notices ..................................................................................................................................... - 4 -
1.1 Warning ................................................................................................................................................... - 5 -
1.2 Notes ....................................................................................................................................................... - 7 -
2. TV boards: ...................................................................................................................................................... - 10 -
2.1 Main board layout ................................................................................................................................. - 10 -
2.3 TV boards part list ................................................................................................................................ - 13 -
3. Factory/Service OSD Menu and Adjustment .................................................................................................. - 14 -
3.1 Remote Control ..................................................................................................................................... - 14 -
3.2 How to enter the Factory OSD Menu ................................................................................................... - 15 -
3.3 Factory OSD Menu ............................................................................................................................... - 17 -
4. Software Upgrading ........................................................................................................................................ - 22 -
4.1 USB Upgrade ........................................................................................................................................ - 22 -
4.2 Mstar Tool upgrading ............................................................................................................................ - 24 -
5. Trouble shooting ............................................................................................................................................. - 36 -
5.1 Troubleshooting for Remote Control .................................................................................................... - 36 -
5.2 Troubleshooting for Function Key ........................................................................................................ - 37 -
5.3 TV won’t Power On .............................................................................................................................. - 38 -
5.4 Troubleshooting for Audio .................................................................................................................... - 39 -
5.5 Troubleshooting for TV/HDMI input ................................................................................................... - 40 -
5.6Troubleshooting for Video input ............................................................................................................ - 41 -
6. Signals Block Diagram & power assign & schematic diagram ...................................................................... - 41 -

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

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Hereafter throughout this manual.
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.
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.
IMPORTANT:
Always disconnect the power cord from AC outlet before replacing parts or modules.
●
1.1.3
To prevent electrical shock, use only a proper
●ly grounded 3 prong outlet or extension
cord.
1.1.4