LED Television

Service Manual

Chassis： MT9603

Version: V 1.0

Hisense Visual Technology Co.，Ltd.

 REVISION HISTORY

Version Revise content Reviser Date

V1.00 First issued Zhangxue 2023-10-16

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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 -
2.2 TV boards part list ................................................................................................................................- 15 -
3. Factory/Service OSD Menu and Adjustment..................................................................................................- 17 -
3.1 Remote Control.....................................................................................................................................- 17 -
3.2 Factory OSD Menu ...............................................................................................................................- 20 -
4. Software Upgrading ........................................................................................................................................- 26 -
4.1 USB Upgrade ........................................................................................................................................- 26 -
4.2 Novatek Tool upgrading .......................................................................................................................- 27 -
5. Trouble shooting .............................................................................................................................................- 30 -
5.1 Troubleshooting for Remote Control ....................................................................................................- 30 -
5.2 Troubleshooting for Function Key ........................................................................................................- 31 -
5.3 TV won’t Power On ..............................................................................................................................- 32 -
5.4 Troubleshooting for Audio ....................................................................................................................- 33 -
5.5 Troubleshooting for TV/VGA/HDMI input..........................................................................................- 34 -
5.6 Troubleshooting for YPbPr input ..................................................................... Erreur ! Signet non défini.
5.7 Troubleshooting for Video input ...........................................................................................................- 35 -
6. Signals Block Diagram & power assign & schematic diagram ......................................................................- 36 -

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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.

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 properly grounded 3 prong outlet or extension

cord.

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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

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.

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 (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

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.

• Before starting the work, secure a sufficient working space.

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• At all times other than when adjusting and checking the product, be sure to turn OFF

the POWER Button and disconnect the power cable from the power source of the TV

during servicing.

• To prevent electric shock and breakage of PC board, start the servicing work at least 30

seconds after the main power has been turned off. Especially when installing and

removing the power board, start servicing at least 2 minutes after the main power has

been turned off.

• While the main power is on, do not touch any parts or circuits other than the ones

specified. If any connection other than the one specified is made between the measuring

equipment and the high voltage power supply block, it can result in electric shock or

may trip the main circuit breaker When installing the LCD module in, and removing it

from the packing carton, be sure to have at least two persons perform the work.

• When the surface of the panel comes into contact with the cushioning materials, be

sure to confirm that there is no foreign matter on top of the cushioning materials before

the surface of the panel comes into contact with the cushioning materials. Failure to

observe this precaution may result in, the surface of the panel being scratched by foreign

matter.

• Be sure to handle the circuit board by holding the large parts as the heat sink or

transformer. Failure to observe this precaution may result in the occurrence of an

abnormality in the soldered areas.

• Do not stack the circuit boards. Failure to observe this precaution may result in

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problems resulting from scratches on the parts, the deformation of parts, and

short-circuits due to residual electric charge.

• Perform a safety check when servicing is completed. Verify that the peripherals of the

serviced points have not undergone any deterioration during servicing. Also verify that

the screws, parts and cables removed for servicing purposes have all been returned to

their proper locations in accordance with the original setup.

The lightning flash with arrowhead symbol, within an equilateral triangle is

intended to alert the user to the presence of uninsulated dangerous voltage within the

products enclosure that may be of sufficient magnitude to constitute a risk of electric

shock.

The exclamation point within an equilateral triangle is intended to alert the

service personnel to important safety information in the service literature. .

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2. TV boards:

2.1 Main board layout

2.1.1 The top of main board (RSAG7.820.10588/ROH)

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- 11 -
2.2 Wiring diagram( example for 55E70LEVS):

XP2： Power for main board jacket

Main board terminal Power board terminal

Pin definition Pin definition
1 IR_IN 1 IR_IN

2 GND 2 GND

3 LED 3 LED-1
4 3.3V_SENSOR2 4 3.3V

5 3.3Vstb 5 3.3Vstb

6 SCL 6 SCLR
7 SDA 7 SDA

8 KEY1 8 KEY0

9 GND 9 GND

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 10 LED_OFF 10 LED_2

11 GND

XP12：68pin P2P jacket

Main board terminal jacket definition Panel terminal jacket definition

Pin Definition illustration Pin definition

1 CTRL7 Control pin 68 NC
2 CTRL6 Control pin 67 NC
3 CTRL5 Control pin 66 NC
4 CTRL4 Control pin 65 TEND
5 CTRL3 Control pin 64 VCE
6 CTRL2 Control pin 63 LC
7 CTRL1 Control pin 62 YDIO1
8 GND Ground 61 GND
9 X0B_0P 60 P2P1P
10 X0B_0N 59 P2P1N
11 GND Ground 58 GND
12 X0B_1P 57 P2P2P
13 X0B_1N 56 P2P2N
14 GND Ground 55 GND
15 X0B_2P 54 P2P3P
16 X0B_2N 53 P2P3N
17 GND Ground 52 GND
18 X0B_3P 51 P2P4P
19 X0B_3N 50 P2P4N
20 GND Ground 49 GND
21 X0B_4P 48 P2P5P
22 X0B_4N 47 P2P5N
23 GND Ground 46 GND
24 X0B_5P 45 P2P6P
25 X0B_5N 44 P2P6N
26 GND Ground 43 GND
27 X0B_6P 42 P2P7P
28 X0B_6N 41 P2P7N
29 GND Ground 40 GND
30 X0B_7P 39 P2P8P
31 X0B_7N 38 P2P8N
32 GND Ground 37 GND

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33 X0B_8P 36 P2P9P
34 X0B_8N 35 P2P9N
35 GND Ground 34 GND
36 X0B_9P 33 P2P10P
37 X0B_9N 32 P2P10N
38 GND Ground 31 GND
39 X0B_10P 30 P2P11P
40 X0B_10N 29 P2P11N
41 GND Ground 28 GND
42 X0B_11P 27 P2P12P
43 X0B_11N 26 P2P12N
44 GND Ground 25 GND
45 P2P_LOCK 24 P2P_LOCK
46 GND Ground 23 GND
47 MSPI1_MIS LDC_DATA_I 22 NC
O
48 MSPI1_MO LDC_DATA_O 21 NC
SI
49 MSPI1_SCK LDC_CLK 20 NC
50 MSPI1_SCZ DENURA_CS 19 NC
51 GND Ground 18 GND
52 T_nWR Write protect 17 nWR
53 T_SCL I2C CLK 16 SCL
54 T_SDA I2C DATA 15 SDA
55 GND Ground 14 GND
56 GND Ground 13 GND
57 GND Ground 12 GND
58 GND Ground 11 GND
59 GND Ground 10 GND
60 NC 9 NC
61 12V_PANEL Power Supply Input 8 VCC_PANEL
Voltage
62 12V_PANEL Power Supply Input 7 VCC_PANEL
Voltage
63 12V_PANEL Power Supply Input 6 VCC_PANEL
Voltage
64 12V_PANEL Power Supply Input 5 VCC_PANEL
Voltage
65 12V_PANEL Power Supply Input 4 VCC_PANEL
Voltage
66 12V_PANEL Power Supply Input 3 VCC_PANEL
Voltage

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 67 12V_PANEL Power Supply Input 2 VCC_PANEL
Voltage
68 12V_PANEL Power Supply Input 1 VCC_PANEL
Voltage

XP9：Speaker jacket

Pin definition illustration Wire color

1 L+ Left speaker positive wire Red
2 L- Left speaker negative wire White
3 R- right speaker negative wire White
4 R+ Right speaker positive wire Black

2.3 Ties,clamps and tapes:

to show the positions where ties and clamps and tapes should be, for checking after
servicing, Before disassemble the TV ,besure to take photes for the TV assembly example
for 55E70LEVS.

2.2 TV boards part list

Main board Boards function difference Main chassis type For Series

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 55E70LEVS

RSAG2.908.13696- 1. Lateral terminal and vertical terminal. MT9603

01 2. TCON part on the board.

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3. Factory/Service OSD Menu and Adjustment

3.1 Remote Control

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3.2 Factory OSD Menu

figure -1

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Factory OSD menu list: if you want to learn more about TV, you’d better read it but

would not adjust the value please. The Factory menu may be have difference for diverse

market and customer. Take HE55A7000EUWTS for example.

Options:

Write keys:

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Note:
Check whether the Key information under the current Version is OK, if appears “NG” or such as following
red surround irregular information then need rewrite the key.

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 Factory menu Remark
Description
White Balance data adjusting, different source
White Balance has different WB values. Before adjusting,
please change to desired source.

channel init TV Produce signal preset, during the factory

produce using.

Option
Items can choose

Clear all
initial the TV，EEPROM reset

Soft version current software version information

Version Software Version information

Menu

MAC address information

MAC Adr

HDCP2.2 key information

HDCP2.2 key

The TV’s electronic Serial number

ESN

WIDEVINE key WIDEVINE key code

LTDNXXXXXXY-P0001
Service No.

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Channel init huangdao old

Qing Dao TV Produce signal preset, during the

factory produce using.

huangdao new

……

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 "M" used in factory product.
Option ToFAC M/U "U" used in user state.

LNB power 13/14;18/19;Power off

Region North America

country Country choose

Logo Customer logo choose

Language Language choose

VCOM Panel voltage,

UART On/off (when choose "on" then can serial port

connect with Tool successfully)
On/off
PQ COM

CI+

MAC If MAC key code lost, you can write.

Write keys
HDCP2.2
If HDCP key code lost, you can write .

Netflix
If Netflix key code lost, you can write .
If Widevine key code lost, you can write .
Widevine

Note:
The Factory menu may be have difference for diverse market and customer, above Factory
menu only for reference.
The factory menu data varies according to different sources. Incase changing the factory data by error, you can
choose to “Clear all”, by which you can resume the default value.
To clean the EEPROM:
a. Select the item “Option”--“Clear all” in Factory mode.

b. Press button to clear the EEPROM data.

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c. Close the OSD menu after 5 seconds.
d. Restart the TV.
e Also the Keys information must been checked, if appear “NG”, then must rewrite key code.

4. Software Upgrading

4.1 USB Upgrade

Main software upgrade directly with USB

The main software can be upgraded with USB disk. It includes two modes: user mode、 factory mode.
Take 50A683FEvS for example.
4.1.1 TV in user mode：
a. Decompress NOVATEK_DEV_EU_pkg_YYYYMMDD.tar.gz (YYYYMMDD is the year/month/day when the
software is being built, such as NOVATEK_DEV_EU_pkg_20201130.tar.gz) and copy
usb_NOVATEK_DEV_EU.bin file to the USB root directory. Please make sure the USB disk format is Fat32，
and there are no other “*.bin” files in the root directory of USB disk .
b. AC power off the TV, insert the USB disk to the USB 2.0 port, TV in standby status,next long press the “power
key . If “Loading data……” is shown on TV, it means TV successfully enters upgrading status..
c. Waiting TV is trying to load the software and it will spend about 2 minutes. After that “UPGRADING
SOFTWARE, PLEASE DO NOT TURN OFF” will be displayed and upgrade process bar will indicate the
progress. It needs about s5 minutes to complete the whole software upgrade.
d. After upgrade, TV can automatically reboot.
e. Enter the Factory OSD Menu to check the main software version, and then choose “option”“Clear All” to do
clean up.

4.1.2 TV in factory mode：

a. If TV is in Factory mode, only have difference from chapter 4.1.1 b. as following. others are same.
b. TV is in factory mode, only AC power off TV and insert the USB disk, next AC power on, TV can identify
automatically to update, till call up “Loading data……” interface , update process bar is 1%.

4.1.3 If the above USB upgrade methods fail, you can rename the upgrade software to
usb_NOVATEK_DEV_EU.bin,next use serical “cu” to update

4.1.4 When upgrade successfully, We must ensure the TV mode of running correctly.
Paths: Factory---Design –Project ID
Once choose another TV mode ,must AC power off and power on the TV to reboot.

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Firgure-1: Upgrading software

Firgure-1

4.2 Novatek Tool upgrading

If USB upgrades failure, TV crashed and SecureCRT no print message. Repairer must read IC device
ID code 、 decipher& burn the Mboot program the EMMC flash first. then USB disk to upgrade the
“usb_NOVATEK_DEV_EU.bin”file.

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 Hardware connecting

Connect the unit to your pc with Hisense USB-serial port cable. USB port connects to your PC and
earphone port to TV’s service debug. As following.

4.2.1 Open the UART serial option

UAR serial choose “on “
Menu: Factory-->Options–>UART–>on

If finish the updating and data adjust UART serial, UART choose “off “

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 4.2.2 Novatek USB-serial driver
It’s the same as Mstar bebug Tool.
If First use Mstar bebug Tool, you have to install drive software for bebug board.
If your PC is Windows XP system:
First install FTCUNIN.EXE of FTC100103(MSTAR) rar file in your PC.
This is a drive software of Mstar

Another:
If your PC is Win7 system, you will have to install CDM20802_Setup_WIN7 rar file，and then open the
software of SecureCRT in your PC.

4.2.3 Stop board serial connect with SecureCRT

Run SecureCRT,printing information includes three status:Mboot\Supernova\no print information.
Current steps:
1) Run SecureCRT.exe
2) TV power on.
3) SecureCR tool print information can appear or not.

How to distribute the three status?

1) appearing “N62020_A32_SEC>” that meaning is in Mboot status;

2) Rolling many informmation automatically that meaning is in Supernova status;
3) No any print information that meaning the eMMC of board is no program.

Stop board serial with SecureCRT

1) In mboot status:
N62020_A32_SEC>
Input “shift” and “~” key to ensure, then close the SecureCRT window.
2) If no any print information with SecureCRT,then can directly close the SecureCRT window.

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5. Trouble shooting

5.1 Troubleshooting for Remote Control

Remote control does not work

YES
Try new batteries Replace battery

NO

YES
Replace RC Replace remote control

Check IR receiver

Change Led & IR board

YES
Replace Led & IR BD

NO

YES
Change Led & IR cable Replace Led & IR cable

NO

Replace main board

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5.2 Troubleshooting for Function Key

Buttons does not work

YES Check solder connections and see if

Check switches
any switches are stuck.
NO
YES Replace Key BD
Check key board

NO
Check Key BD cable

YES

Change Key BD OK

NO
Replace main board

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 5.3 TV won’t Power On

TV won’t power on

NO Make Sure Power

Is LED Check Power YES
light? Output source is live

NO
YES

No light Check Power YES Replace Power Cord

RED
Cord

NO Check/replace IR BD or
Only
Keypad PCA
Try Power on by
one works

Panel Bright
YES Check signal RC and Button

Source Neither
Both
NO YES works
Work
NO Replace Main
BD

Replace Main BD

NO YES
YES Power on OK

Replace Panel
NO
(to contact Hisense tech support.)

Replace Power BD

OK

Notice:

MSD6586 Europe market：

TV work normally indication led is no light.
TV standby indication led is red.

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5.4 Troubleshooting for Audio

No sound

YES
Check connecter Reconnect

NO
YES
Check speaker wire Replace speaker wire

NO

YES
Check speaker set Replace speaker set

NO

Replace main board YES

OK

Power Supply Board

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5.5 Troubleshooting for TV/VGA/HDMI input

No picture on the screen

NO
Check Signal Source
Make sure signal
source is available

YES
Check connect Reconnect

NO

YES
Check cable Replace cable

NO

Replace main board

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5.6 Troubleshooting for Video input

No picture on the screen

Check Source work or not NO

Check Signal Source

YES

YES
Check connect Reconnect

NO

YES
Check Cable/ Wires Replace Cable/Wires

NO

Replace main board

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6. Signals Block Diagram & power assign & schematic diagram

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- 37 -