Changhong Electric 24E3100 User manual

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LED COLOUR TV
MAINTENANCE MANUAL
CHASIS: HLS48D（MSD6306PUS-Z1）
MODEL:24E3100
(JUC7.820.00191640/00186536(CKD))
Please read this manual carefully before maintenance

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Chapter1 Safety and notes.................................................................................................................................................. 3
1-1 Installation notes.................................................................................................................................................. 3
1-2Attention points of operation and using............................................................................................................... 3
1-3 Storage notes........................................................................................................................................................ 3
1-4 Dismantling notes................................................................................................................................................ 3
1-5 High-voltage warning.......................................................................................................................................... 4
Chapter2 whole machine standard and terminal functions ................................................................................................ 4
2-1 Basic standard...................................................................................................................................................... 4
2-2 Introduction of terminals(practicality photos) ..................................................................................................... 5
Chapter3 Main chip functions and the introductions of power supply ..............................................................................6
3-1 Main IC and functions of HLS48D...................................................................................................................... 6
3-2 Pin function description of HLS48D chip............................................................................................................ 7
3-2-1 MSD6306PUS-Z1 recommended operating power conditions ............................................................. 7
3-2-2 KH25L3206EM2I-12G 32Mbit(4M x 8bit) brief introduction: ............................................................... 7
3-2-3 SY8008B DC-DC brief introduction:....................................................................................................... 7
3-2-4 MP1471AGJ-LF-Z DC-DC brief introduction:........................................................................................ 7
Chapter4 The chassis frame diagram, mainboard power supply systems, mainboard interface definition........................ 8
4-1 Power supply system ........................................................................................................................................... 8
4-1-1 The composition and distribution of the TV power supply...................................................................... 8
4-1-2 Pin voltage of the voltage adjustor on the mainboard ..............................................................................9
4-1-3 Interface definition ................................................................................................................................. 10
Chapter5 Software upgrade instructions.......................................................................................................................... 11
5-1 Software upgrade tooling---there are two kinds of using upgrade tooling ........................................................ 11
5-2 Software upgrade introduction........................................................................................................................... 11
Chapter6: Classical accident maintenance procedures and examples.............................................................................. 15
6-1 The thinking of don’t boot ................................................................................................................................. 15
6-2 Common problems for your reference............................................................................................................... 15
6-3 Trouble Shooting ............................................................................................................................................... 16
Chapter7 High voltage and high current wearing parts list.............................................................................................. 21
Chapter8 Factory mode parameter setting instructions and notes.................................................................................... 22
8-1 Enter into the factory mode ............................................................................................................................... 22
8-2 Setting method of factory menu......................................................................................................................... 24
Chapter9 Instructions of HLS48D module Circuit Schematic Diagram.......................................................................... 24
Appendix ：Circuit Schematic Diagram ...................................................................................................................... 24

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Chapter1 Safety and notes
1-1 Installation notes
(1) Please don't beat or rub, scratch the surface of the LED screen heavily, don’t touch it with your hand
casually.
(2) When the screen is dirty, please clean it with absorbent cotton or cotton cloth slightly.
(3) Please clean it timely when water or other viscosity pollution fall, which may make the LED face or
color change.
(4) Please don’t make the LED screen shaked by strong external force.
1-2 Attention points of operation and using
(1) Please unplug the power cable before moving the LED screen.
(2) Please don’t change the original setting of the mainboard’s, if not, the brightness and white balance
etc. may not meet the specification.
(3) The radiation of a long time using in the room temperature is larger than the low temperature.
(4) Please note that the long displaying image may remain at the top when shutdown the machine.
(5) Please avoid the impact from the mobile phone to protect your TV.
1-3 Storage notes
(1)When stored for a long time, please keep the temperature between 0℃to 40℃,don’t expose the TV to
the strong sunlight, the humidity should be less than 85％RH.
(2)Please don’t put your TV under high humidity and high temperature environment, for example, the
temperature: 60℃, and the humidity: 85%RH.
(3)Please don’t put your TV under low temperature environment, for example, the temperature lower
than -25℃.
1-4 Dismantling notes
(1)As LED screen is easy to be damaged, while dismantle, please attention to protect.
(2)Please attention the position of each screw when dismantle, in case to beat the wrong position when
install, if not, it may lead to crack or slide of the face frame.
(3) If you need to dismantle the power board or the mainboard, please attention the position and

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direction of each line, especially the direction of the screen line, in case of causing accident when install.
Before dismantle, we can take some photos of the line route for the comparison of installing.
(4)After check and maintenance, please assure that there is no foreign body in the machine when install.
1-5 High-voltage warning
The high-voltage of the LED screen is generated by the power supply board, without attention to
exposure to the high voltage, one may meet a serious electricity shock.
Chapter2 whole machine standard and terminal functions
2-1 Basic standard
Item
Standard
LED Panel
Model Name
C240F17-E31-A(G72)
the parameters are for
reference only,the specific
should accord to the standard
of the screen practicality of
the batch orders
Visual area
23.8 inches
aspect ratio
16:9
resolving ratio
1920 x 1080 Pixel
Visual area H x V
527.04 (H) ×296.46(V)
Contrast Ratio
3000：1
brightness
180cd/m²（Type）
Visual angle
170°(horizontal)/170° (vertical)
react time
Tr+Tf=20ms
backlight life
30000 hours(Type)
color temperature
cold/hot
TV function
Sound system
M/N
color system
NTSC/PAL-N/PAL-M
Audio and video
signal input
AV
AV x 1
Audio and video signal input
YPBPR
YPBPR x 1
support to1080P
PC
PC x 1
Audio and video signal input
HDMI
HDMI x2
support to1080P
USB
USB x1
support media player
Audio output
Headphone x1
Audio signal output
Power
power supply
AC100V~240V, 50/60Hz
requirement for environment
power achievement
<40W
operation temperature
storage temperature
operation humidity
+ 0° ~ + 50° ，
- 20 ° ~ + 60°
10% ~90%
requirement for environment
W x H x D
\
appearance size
no accessory
\

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2-2 Introduction of terminals(practicality photos)
ATTENTION:
1.HDMI support to 1080P；
USB input
RF input
HDMI2 input
Backlight control
IR input
Lvds output
AV and
YPBPR
input
HDMI1 input
Audio L/R
input
Speaker Audio
output
Power AC input
PC input
Headphone
output

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2.The recommendation resolving ratio of PC is 1280X768；
Chapter3 Main chip functions and the introductions of power supply
3-1 Main IC and functions of HLS48D
No.
Item no.
Model(EXAMPLE)
Main function
1
U805
MP1471AGJ-LF-Z
DCDC：12V to 5V
2
U804
LR1117/A-3.3
5V to 3.3V LDO
3
UA1
RT9118GQW
Audio amplifier
4
U807
AZ1117H-ADJTRE1
5V to 1.5V LDO
5
U201
MSD6306PUS-Z1
Mian chip：Video decoder, image processor, A/D and D/A
conversion..
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U202
KH25L3206EM2I-12G
32 Mbit(4M x8bit), low voltage, Serial Flash memory
7
U802
SY8008BAAC
DCDC：5V to 1.2V
8
U1
TDA18275AHN/C1
Tunner IC
9
UB1
OB3350CPA (SOP-8)
Drive IC
10
U002
LR1117/A-3.3
5V to 3.3V LDO
U807: AZ1117H-ADJTRE1
U002：LDO-3.3V
U201：MSD6306PUS-Z1
U202：KH25L3206EM2I-12G
U1：TDA18275AHN/C1
U805: MP1471AGJ-LF-Z
UA1：RT9118GQW
UB1:OB3350CPA (SOP-8)
U804：LDO-3.3V
U802：SY8008BAAC

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3-2 Pin function description of HLS48D chip
3-2-1 MSD6306PUS-Z1 recommended operating power conditions
(The Main Chip Built-in DDR Supplied by 1.5V Supply Voltages )
Parameter
Symbol
Min Typ Max
Unit
3.3STB Supply Voltages
3.3V_STB
3.14 3.3 3.46
V
1.5V DDR Supply Voltages
1.5V_DDR3
1.455 1.5 1.545
V
1.2V Core power Supply Voltages
1.2V_VDDC
1.164 1.2 1.236
V
Junction Temperature
Tj
125
℃
Case Temperature
TC
0 40
℃
3-2-2 KH25L3206EM2I-12G 32Mbit(4M x 8bit) brief introduction:
Pin NO.
Pin Name
I/O
Function
1
CS#
I
Chip Select
2
SO/SIO1
O
Serial Data Output
3
WP#
I
White Protect
4
GND
\
Ground
5
SI/SIOP
I
Serial Data Input
6
SCK
I
Serial Clock
7
HOLD#
I
Pause the communication
8
VCC
\
+3.3V Power Supply
3-2-3 SY8008B DC-DC brief introduction:
Pin introduction:
Pin
SYMBOL
Function description
1
EN
Enable Input.
2
GND
Ground
3
OUT
Power Switching Output.
4
IN
DC Power Input.
5
NC
Not Connect
6
FB
Feedback Input.
3-2-4 MP1471AGJ-LF-Z DC-DC brief introduction:
Pin introduction:

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Pin
SYMBOL
Function description
1
GND
Ground pin
2
SW
Switch node
3
IN
Input voltage supple pin
4
FB
Feedback input
5
EN
Enable Input.
6
BST
Supple input for the high-side FET gate drive
Chapter4 The chassis frame diagram, mainboard power supply systems,
mainboard interface definition
This chapter mainly introduce the chassis frame diagram, power supply system, interface definition
4-1 Power supply system
This mainborad has two kinds power supply systems,one is adapter power supply,the other is as follows:
4-1-1 The composition and distribution of the TV power supply

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4-1-2 Pin voltage of the voltage adjustor on the mainboard
item No.
U804
U807
U802
U002
U805
U805(PIN3)
U802(PIN4)
UB1
output
voltage
3.3Vstb
1.5V
1.2Vstb
3.3V
5Vstb
12V
5V
24.0 -28.8V
3.3Vstb
3.3V
1.5V
PIN3:12Vstb
PIN6:5Vstb
PIN4:5V
PIN3:1.2V
24.0V～30.4V

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4-1-3 Interface definition
L+,L-,R-,R+
LED-,LED+
LED_R,IR_IN,GND,5Vsb

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Chapter5 Software upgrade instructions
5-1 Software upgrade tooling---there are two kinds of using upgrade tooling
1.Use the combined interface(the parallel port) upgrade tooling: use the upgrade programme: TV
Utility_4.4.
2.Use interface upgrade tooling, use the upgrade programme: versions higher than TV Utility_4.4
5-2 Software upgrade introduction
1. Set up ISPTooling to upgrade the software
2.Open the ISPtooling and select “Connect”
Computer
upgrade
tooling
LED TV
Combine interface or USB
VGA

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3.Pls select “OK”once you connect the tooling successfully
4.Select “Read”

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5. Choose right software document and open the file.
6. Select “Auto”

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7. Select “Run”.
8. The software is updating.
9. Please turn on the TV again once the software is updated successfully.

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Chapter6: Classical accident maintenance procedures and examples
6-1 The thinking of don’t boot
The power is not connected.
6-2 Common problems for your reference
To speed you to dignose and solve problems, the following commom problems are offered for your
reference.
Symptoms
Possible Reason
Solutions
No picture, no sound, and no
indicator light on
1. The power cord is not plugged in
2. Contrast, brightness, color and
volume are all in the minimum value
or TV is in mute mode.
3. There is no audio signal input ,or the
audio cable or the signal cable is not
correctly connected.
1.Plug in the power cord
2. Adjust the value of contrast,
brightness, color and volume
3. Connect the signal cable or the
audio cable correctly
Picture and sound is abnormity
1.Contrast, sharpness, and color are set
improperly
2.Color system is improperly
3.Sound system is improperly
1.Adjust the number value of
Contrast, sharpness, and color
2.Set the Color system to the
country broadcasting standard
3.Set the Sound system to meet the
country’s broadcasting standard
Picture is spotted or with snow
Signal source is low-level or the signal
cord is in a lower quality
Use the qualified signal cord
Black screen, ‘no signal’ is
displayed
There is no signal input or the video cable
is not connected or incorrectly connected
Connect the video cable correctly

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HDMI source, with snow pixel of
full screen
The signal source is not normal
Plug the HDMI cable again
The remote control does not work
Batteries are improperly installed or
exhausted
1. Make sure the positive and the
negative polarities are correct.
2.Check if there is a loose contact
between the batteries and the
springs
3.Replace the batteries
6-3 Trouble Shooting
6-3-1 LED driver power supply service guide
6-3-2 The system’s power
s

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6-3-3 Black Screen

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6-3-4 Abnormal screen
6-3-5 Audio Part (no sound)

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6-3-6 The TV channel don’t have sound
6-3-7 The HDMI channel don’t have sound

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6-3-8 The tuner can’t search TV channel or no TV image
6-3-9 The HDMI channel doesn’t have image