Philco HLS78D-I User manual

LED COLOUR TV
MAINTENANCE MANUAL
MODEL: HLS78D-I CHASSIS（MSD6486）
(take PCB for example:JUC7.820. 00192431-1)
Please read this manual carefully before maintenance

CATALOG
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......................................................................................5
3-1 Main IC and functions of HLS78D-I .......................................................................................................................... 5
3-2 Pin function description of HLS78D-I chip and description of power supply............................................................ 6
3-2-1 MSD6486 recommended operating power conditions....................................................................................6
3-2-2 Pin function of R842....................................................................................................................................... 7
3-2-3 MT29F4G08ABADAWP:D NAND Flash/4Gbit brief introduction: ..............................................................8
3-2-4 RT9108 brief introduction:...............................................................................................................................9
3-2-5 AMS1117-3.3 brief introduction:................................................................................................................... 10
3-2-6 NCP1251A Current-Mode PWMController for Off-linePower Supplies brief introduction:........................ 10
3-2-7 PF7911 High Voltage BoostController brief introduction: ............................................................................10
3-2-8 TPS563201 brief introduction:....................................................................................................................... 11
3-2-9 SY8088 brief introduction: ............................................................................................................................ 11
3-2-10 MP2225GJ brief introduction:.....................................................................................................................12
3-3 Brief introduction of power supply...........................................................................................................................13
Chapter4 MSD6486 Power Block Diagram, main board power supply systems, main board interface definition and the
waveform of key points...........................................................................................................................................................13
4-1 MSD6486 Power Block Diagram..............................................................................................................................14
4-2 Power supply system................................................................................................................................................. 14
4-2-1 Pin voltage of the voltage adjuster on the main board...................................................................................14
4-2-2 Interface definition.........................................................................................................................................15
Chapter5 Software upgrade instructions.................................................................................................................................. 15
Software upgrade method：Use a U disk including the upgrade program directly upgrade ..........................................15
Chapter6: Classical accident maintenance procedures and examples ..................................................................................... 16
6-1 The thinking of don’t boot......................................................................................................................................... 16
6-2 Common problems for your reference ...................................................................................................................... 16
6-3 Trouble shooting........................................................................................................................................................17
Chapter7 Factory mode parameter setting instructions and notes...........................................................................................24
7-1 Enter into the factory mode.......................................................................................................................................24
7-2 The list of factory mode as follow：(only for reference).................................................................................24
Chapter8 Instructions of HLS78D-I module Circuit Schematic Diagram............................................................................... 26
Appendix：Circuit Schematic Diagram..................................................................................................................................27

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 shake 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 main boards, 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 main board, please attention the position and 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
Active Screen
Size
31.5 inches
the parameters are for
reference only, the
specific should accord to
the standard of the screen
practicality of the batch
orders
Bezel Opening
Area
697.685mm(H) *392.256
mm(V)
Pixel Pitch
0.17025mm*0.51075mm
Pixel Format
1366 horiz. by 768 vert. Pixels, RGB stripe
arrangement
Color Depth
16.7M(Dithered 8bit )
Luminance, White
200 cd/m2 (Typ.)
Viewing Angle
(CR>10)
170(H);170(V)
contrast ratio
3000:1
Driver Element
a-Si TFT active matrix
Display Operation
Mode
Normally black
Surface Treatment
Hard Coating, 3H
TV
function
sound system
M
color system
NTSC/PAL-M/PAL-N
Audio and
video
signal input
AV
AV x 1
HDMI
HDMI x2
support to1080P
USB
USB x1
support media player
Audio output
Audio output L / R
8W inner speakers for each channel
SPDIF
Optical Fiber
SupportAudio output
Internet
RJ-45 terminal
WIFI
Power
power supply
AC100V~240V, 50/60Hz
power achievement
<55W

requirement for environment
operation temperature
storage temperature
operation humidity
+ 0° ~ + 50° ，
- 20 ° ~ + 60°
20% ~ 90%
appearance size
W x H x D
731.18mm(W)*435.04mm(H)*53.8mm(D)
2-2 Introduction of terminals(practicality photos)
ATTENTION:
1.HDMI support to 1080P；
Chapter3 Main chip functions and the introductions of power supply
3-1 Main IC and functions of HLS78D-I
No.
Item no.
Model
Main function
1
UT2
R842
Tuner output IF signal
2
UM1
MSD6486
Video decoder, image processor, A/D and D/Aconversion
3
UM4
MT29F4G08ABADAWP:D
NAND Flash/4Gbit
4
UA1
RT9108
15W Stereo (BTL) Analog Input Audio Amplifier with
Power Limiter and DC Detect
6
UE7
TPS563201
12V to 5V DC-DC
7
UE2
SY8088
12V to 1.5V DC-DC/For Main Chip
9
UE5
AMS1117-3.3
5V to 3.3V LDO/Normal For Main Chip& NAND Flash
11
UE11
AMS1117-3.3
5V to 3.3V LDO/Standby For Main Chip
13
UW01
PH1102G
10/100 BASE-T Single Port Surface Mount Magnetics
14
UP1
NCP1251A
Current-Mode PWMController for Off-line Power Supplies
11
UE8
MP2225GJ
12V to 1.1V DC-DC/For Main Chip
15
UB1
PF7911B
LED Voltage BoostController
WIFI input
Keypad
IR input
LVDS output
Power input
12V output
SPDIF
AV/Component
USB input
HDMI2 input
HDMI1 input
Internet input
RF input
Audio out
BL output
Audio output

3-2 Pin function description of HLS78D-I chip and description of power supply
3-2-1 MSD6486 recommended operating power conditions
UP1：NCP1251A
UB1:PF7911B
UE11:LDO-3.3VS
UE5:LDO-3.3VA
UE7: DC-DC
12V to 5V
UE2: DC-DC
5V to 1.5V
UE8: DC-DC
12V to 1.1V
UM1: MSD6486
UM4:NAND FLASH
UW01:PH1102G
UA1:RT9108
UT2: R842

3-2-2 Pin function of R842
Pin description:

3-2-3 MT29F4G08ABADAWP:D NAND Flash/4Gbit brief introduction:
Pin introduction:
Block diagram

3-2-4 RT9108 brief introduction:
Pin introduction:

3-2-5 AMS1117-3.3 brief introduction:
Pin introduction:
3-2-6 NCP1251A Current-Mode PWMController for Off-linePower Supplies brief introduction:
3-2-7 PF7911 High Voltage BoostController brief introduction:
Pin introduction:

3-2-8 TPS563201 brief introduction:
Pin introduction:
3-2-9 SY8088 brief introduction:

3-2-10 MP2225GJ brief introduction:

3-3 Brief introduction of power supply
Chapter4 MSD6486 Power Block Diagram, main board power supply
systems, main board interface definition and the waveform of key points
This chapter mainly introduce the chassis frame diagram, power supply system, interface definition and each
key point’s wave shape.
AC input
AC100-240
V
50/60HZ
Use for LED backlight
power supply

4-1 MSD6486 Power Block Diagram
4-2 Power supply system
Power board has one kind of output voltage: +12VSTB.
4-2-1 Pin voltage of the voltage adjuster on the main board
item No.
UE7
QE4
UT1
UE5
UE11
UE2
UE8
output voltage
5VS
5VA
TUN_3.3V
3.3VA
3.3VS
1.5V
1.1V
3.3VS
3.3VA
5VS
1.5V
1.1V
TUN_3.3V
5VA

4-2-2 Interface definition
Chapter5 Software upgrade instructions
Software upgrade method：Use a U disk including the upgrade program directly
upgrade
1)Download the bin file:To the root directory of your USB device (Do not change the filename
"MstarUpgrade.bin");Then insert the USB device to USB interface of TV set.
2)Press the “Setting - Option - Upgrade - USB Upgrade”button on key board，it will upgrade
directly as follow.
L+ L- R- R+
5V_WIFI WIFI_DM WIFI_DP GND WOW WIFI_RST
5VS GND IR-IN LED-R

9、3). When update finished, TV will automatically shut down and then boot. Then Set default
the TV: Setting--->Option->Restore Factory Default.
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 diagnose and solve problems, the following common 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.The power is off
1.Plug in the power cord
2.Turn the power on
Abnormity Picture and sound with
1.Contrast, sharpness, and color are set
improperly
2.Color system is improperly
3.Sound system is improperly
1.Adjust the numerical 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-grade or the signal
cord is in a lower quality
Use the qualified signal cord
No picture, no sound and indicator
light is green
Contrast, brightness, color and volume are
all in the minimum value or TV is in mute
mode.
Adjust the value of contrast,
brightness, color and volume
The signal cable is not correctly connected.
Connect the signal cable correctly
Blue screen, AV or SVIDEO is
displayed
There is no signal input or the video cable is
not connected or incorrectly connected
Connect the video cable correctly

No sound
There is no audio signal input or audio
cable is not connected correctly
Connect the audio cable correctly
VGA picture display with improper
color
The color temp is adjusted incorrectly by
user
Readjust the color temp, or select
the original color setting
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
1、AC/DC power supply

2、LED driver power supply
3、Power part

4、Black Screen
5、white screen or AGP

6、Abnormal screen
7、No sound