This service manual is only for service personnel to take reference with. Before
servicing
1. Instructions
Be sure to switch off the power supply before replacing or welding any components or
inserting/plugging
process!):
a) Do not touch here and there by hand at will;
b) Be sure to use anti static electric iron;
c) It’s a must for the welder to wear anti static gloves.
Please refer to the detailed list before replacing components that have special safety requirements.
not change the specs and type at will.
Do
in
connection wire Anti static measures to be taken (throughout the entire production
2. Points for attention in servicing of LED
2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to
Use the screen of the original model for replacement.
2.2 The operation voltage of LED screen is
protecting
right
yourself and the machine when testing the system in the course of normal operation or
after the power is switched off. Please do not touch the circuit or the metal part of the module
high voltage. Be
sure to take proper measures in
That is in operation mode. Relevant operation is possible only one minute after the power is switched
off.
2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or damage
to the set.
2.4 Never operate the set or do any installation work in bad environment such as wet bathroom,
laundry,
Otherwise
2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into the
module, be sure to cut the power off immediately and do not move anything on the module lest it should
cause fire or electric shock due to contact with the high voltage or short circuit.
2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off at
once.
power
2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the
power
circuit.
2.8 When operating or installing LED please don’t subject the LED components to bending, twisting or
extrusion, collision lest mishap should result.
2.9 As most of the circuitry in LED TV set is composed of CMOS integrated circuits, it’s necessary to
pay attention to anti statics. Before servicing LED TV make sure to take anti static measure and
ensure
kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc.
bad effect will result.
Likewise, if the screen is not working after the power is on or in the course of operation, the
must be cut off immediately and no more operation is allowed under the same condition.
is
off because in this case relatively high voltage still remains in the capacitor of the driving
Please wait at least one minute before the pulling out or plugging in the connection wire.
full grounding for all the parts that have to be grounded.
2.10 There are lots of connection wires between parts behind the LED screen. When servicing or
moving
would
If the connection wires, connections or components fixed by the thermo tropic glue need to disengage
when service, please soak the thermo tropic glue into the alcohol and then pull them out in case of
damage.
the set please take care not to touch or scratch them. Once they are damaged the screen
be
unable to work and no way to get it repaired.
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2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to
breakage
before
2.12 For the storage make sure to put it in a place where the environment can be controlled so as to
prevent
prolonged
place.
of
screen glass or damage to driving circuit. Therefore it must be packed in a strong case
the transportation or handling.
the temperature and humidity from exceeding the limits as specified in the manual. For
storage, it is necessary to house it in an anti-moisture bag and put them altogether in one
The ambient conditions are tabulated as follows:
Temperature
Scope for operation
0
~ + 35
oC
Humidity
2.13
Display of a fixed picture for a long time may result in appearance of picture residue on the
as
screen,
of LED screen. This phenomenon doesn’t represent failure. This “ghost shadow” may remain
in the picture for a period of time (several minutes). But when operating it please avoid displaying still
picture in high brightness for a long time.
commonly called “ghost shadow”. The extent of the residual picture varies with the maker
Scope for storage
Scope for operation
Scope for storage
-20 ~
+ 60oC
20% ~
10% ~ 90%
80
%
3. Points for attention during installation
3.1 The front panel of LED screen is of glass. When installing it please make sure to put it in place.
3.2 For service or installation it’s necessary to use specified screw lest it should damage the screen.
3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between the
screen and the glass will affect the receiving and viewing effect
3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and
insulation
3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.
please take care to keep it in intactness so as to avoid hidden trouble.
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2. Alignment instructions
(1) Test equipment
VG-859 (YPbPr, VGA, HDMI signal generator)
FLUKE 54200(TV signal generator)
CA310
(white balancer)
(2) Power test
Connect main board, power board and IR board according the wiring diagram, connect
the power and press power key (Remote controller or Keypad) button to turn on the TV.
a) Test the pin voltage of P802/power board , the data is shown in table1:
Table1
voltage data of P802
For 39”
P802 Pin1,2 Pin3,4 Pin5,6,7Pin8,9 Pin10,11
Voltage GND 11.4V~12.6V GND 11.4V~12.6V 4.75V~5.25V
For 39”
Pin12 Pin13 Pin 14 Pin15 Pin16
On:2.5V~5.25V
Off: 0~0.5V
Normal: 2.0~5V
Abnormal :0~0.5V
On:2.5V~5.25V
Off: 0~0.5V
Duty 5%~100% NC
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(3) Alignment flow-chart
The alignment flow-chart is shown as fig-1
Connect to the center signal source and check each
Function of TV (station leaking, analog control, etc.)
Check the output of speaker.
Check if EDID, HDCP KEY, FLASH are written
Combined test for general assembly
Auto Gamma adjustment
Input AV signal and check the function
Input HD signal and check the function of YPbPr
Input USB signal and check if the display is normal, check
the function (analog control), horizontal/vertical center, etc.
Input HDMI signal and check if the display is normal, check
the function (analog control), horizontal/vertical center, etc.
Checking SPDIF will output the signal on Amplifier.
Preset ex-factory
Check the accessories and packing
Fig-1 adjustment flow-chart
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(4) Adjustment instruction
At any input source then press the “←”, “EXIT” and “OK” (using RC within 1 sec) to enter factory mode
During Factory menu, if “EXIT” key is pushed, system will exit factory mode.
4-1. Auto Gamma Adjustment & Check
4-2.1. Set into factory mode then choose Auto Gamma Adjust,
4-2.2. Press "2" "3" "2" "4" in turn within 1sec to enter the item, and push Init will self-generate gray pattern
for adjusting.
4-2.3. Following the Cool spec as bellow.
Color Cool
x
100IRE 0.2662
50IRE 0.2658
y
Adjust
Tolerance
100IRE0.2667
50IRE 0.2654
±0.005
(1) Adjust 100IRE
First, Decrease G to meet y spec(0.2667).
Second, Decrease R to meet x spec(0.2662).
(2) Adjust 50IRE
First, Decrease G to meet y spec(0.2654).
Second, Decrease R to meet x spec(0.2658).
Note: Do not adjust the B GAIN on both 100IRE and 50IRE.
When match the spec, pressing “Save” then exit the adjustment page.
(3) When match the spec, pressing right key in "Save" position then exit the adjustment page.
4-2.4. Exit Factory Mode:
After finish Gamma adjust press [EXIT] to exit factory mode.
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(5) Items of Factory menu
When in any source, press the “Left -> Exit -> Enter” key of remote control can enter into factory mode.
During Factory menu, only “EXIT” key is pushed, system will exit factory mode.
Press up and down key can move high light item from Model Change -> Color Temp. Adjust -> Auto Gamma
Adjust -> Timer Clear -> Preset Channel -> Full Power -> ADC Calibration -> Shipping reset -> Bypass Gamma ->
UART Enable -> I2C -> Boot Loader Upgrade -> V-Com Adjust -> SG Pattern.
Push “Enter” key can enter high light item function. (Press left and right can adjust value)
Display Model version, Release Date, firmware version and released date on the bottom.
1)Model ID
Press up or down key can select high light item function
Press enter or right key to enter the item.
It's only used for FW engineer.
2)Color Temp. Adjust
Press up or down key can select high light item function
Press enter or right key to enter the item.
It's only used for PQ engineer.
3)Auto Gamma Adjust
Press up or down key can select high light item function
Press enter or right key to enter the item.
It's only used for PQ engineer.
4)Timer Clear
Reset the timer which records hours of LED panel burn in
This item will have a check dialog “yes or no” to do or not.
- Time in factory mode: Time function shall be displayed automatically. Saving the total time of system
power on (LED turn on), and count the time automatically. The timer is continuous and saved (per 10
minutes) forever, unless it will be reset by doing “Timer Clear”.
5)Preset channel
Load preset channel for production line.
6)Full Power
This is for power consumption testing.
To measure the maximum power consumption of TV set, we adjust the value of following items to
maximum.
- Video: Contrast maximum value, Brightness maximum value, Backlight maximum value.
- Audio: Volume maximum value, Bass default value, Treble default value.
Press enter key to turn on Full Power and OSD stay display until press enter key to recover from Full
Power.
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7)ADC Calibration
ADC Calibration function is reserved for calibration by hand (PQ engineer only).
8)Shipping reset
Reset all settings of OSD menu to default value.
Reset settings: Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting
(Contrast, Brightness etc.), Common setting (Volume, Language etc.), Parental Control (Rating,
Password etc), Closed Caption.
9)Bypass Gamma
For factory test value of gamma.
10)UART Enable
Enable to communicate with Auto-Alignment system.
11)I2C
Enable to communicate with Eeprom burn-in tool.
12)Boot Loader Upgrade
For firmware downgrade used.
13)V-Com Adjust
It's reserved for BMS function.
14)SG Pattern
Aging is for factory burn in and PTN ID provides each pattern for tester using.
(6) Performance check
6-1 TV function
Connect RF to the center signal source, enter Channel menu → auto tuning, check if there are channels be
skipped, check if the picture and speaker are normal.
6-2 AV terminals
Input Video signal, check if the picture and sound are normal.
6-3 YPbPr terminal
Input YUV signal (VG859 signal generator), separately input the YUV signals listed in table4 and check if the
display and sound are normal at any situation (power on, channel switch and format convert, etc.)
Table4
YUV signal format
FREQ PERIOD
SYNC
POLARITY
PIXEL
CLOCK
Display
SYNC
WIDTH
BACK
PORCH
MODE
LINE(kHz)
FRAME
(Hz)
LINE (pixel)
FIELD
(lines)
LINE
FIELD
(MHz)
LINE (pixel)
FRAME
(lines)
LINE (pixel)
FRAME
(lines)
LINE (pixel)
FRAME
(lines)
15.734 1716Negitive 271440 124114
59.94Hz 720x480i
59.94Hz 720x480P
60Hz 1280x720P
60Hz 1920X1080i
60Hz 1920X1080P
59.94 525Negitive 480 315
31,469 858Negitive 27 720 6260
59.94 525Negitive 480 630
45 1650Positive 74.25 1280 40220
60 750Positive 720 520
33.75 2200Positive 74.25 1920 44148
60 1125Positive 1080 515
67.5 2200Positive 148.5 1920 44148
60 1125Positive 1080 536
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6-4 HDMI terminal
Input HDMI signal (VG859 signal generator), separately input the signals listed in table6 and check the display and
sound (32 KHz, 44.1 KHz, 48 KHz) at any situation (power on, channel switch and format convert, etc.)
HDMI signal format
SYNC
POLARITY
PIXEL
CLOCK
Display
SYNC
WIDTH
BACK
PORCH
HDMI
1/2/
DVI
Timing
Table
Table6
FREQ FREQ PERIOD
MODE
640x480
800x600
1024x768
1280x768 (1280cvt)
1280x768
1280x1024
1360x768
1366x768
1920x1080
59.94Hz 1440x480i
59.94Hz 720x480P
60Hz 1280x720P
60Hz 1920X1080i
24Hz 1920x1080P
30Hz 1920x1080P
60Hz 1920X1080P
LINE(kHz)
FRAME(Hz)
31.47 800 Negitive 25.175 640 96 48
LINE (pixel)
FIELD(lines)
LINE
FIELD
(MHz)
LINE (pixel)
FRAME
(lines)
LINE (pixel)
FRAME
(lines)
LINE (pixel)
FRAME
(lines)
59.94 525 Negitive 480 2 33
37.88 1056 Positive 40 800 128 88
60.32 628 Positive 600 4 23
48.36 1344 Negitive 65 1024 136 160
60 806 Negitive 768 6 29
47.4 1440 Positive 68.25 1280 32 80
59.99 790 Negitive 768 7 12
47.78 1664 Negitive 79.5 1280 128 192
59.87 798 Positive 768 7 20
63.98 1688 Positive 108 1280 112 248
60.02 1066 Positive 1024 3 38
47.71 1792 Positive 85.5 1360 112 256
60.02 795 Positive 768 6 18
47.71 1792 Positive 85.5 1366 112 256
59.79 795 Positive 768 6 18
67.5 2200 Positive 148.5 1920 44 148
60 1125 Positive 1080 5 36
15.73 1716 Negitive 27 1440 124 114
59.94 262.5 Negitive 480 3 15
31.47 858 Negitive 27 720 62 60
59.94 525 Negitive 480 6 30
45 1650 Positive 74.25 1280 40 220
60 750 Positive 720 5 20
33.75 2200 Positive 74.25 1920 44 148
60 562.5 Positive 1080 5 15
27 2750 Positive 74.25 1920 44 148
24 1125 Positive 1080 5 36
33.75 2200 Positive 74.25 1920 44 148
30 1125 Positive 1080 5 36
67.5 2200 Positive 148.5 1920 44 148
60 1125 Positive 1080 5 36
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6-5 other functions check
a) Check the sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext, etc.
(7) Firmware update process
(1) Plug the USB with the firmware file named upgrade_2013_NA_60.pkg
(2) If system detect upgrade_2013_NA_60.pkg, USB upgrade message would appear automatically.
(3) Press Up key to select Yes, and then press OK key to start the upgrading.
(4) Upgrading is starting, please wait for the progress finish.
(5) When the progress completed, please follow the instruction to remove USB and restart Power off
then on.
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Working principle analysis of the unit
1.
NTSC
Antenna sig nal will be send to tuner TDST-H021F,
output standard video signal TV-CVBS, and sound SIF signal
signals flow:
the n Tun er wil l be
.
demodulating and
TV-CVBS will send to the master control IC MT5385 to video decode, de-interlace and scaler, then
output
The
volume
digital amplifier TAS5707.
2. Composite/Component signal flow
LVDS level drive for panel display.
sound IF (SIF) will be fed into MT5385, after demodulating, pre-amplifying, bass adjusting and
control, the sound signal
will b e tr ansform into di gital I2S sign al
and sent to
Composite signal an d Compo nent signal will be fed to MT5385 to perform video decode, deinterlace
Audio signal from Composite/Component
and scaler, then output LVDS drive level for panel display.
terminal
adjust and volume control, the sound signal will
to digital amplifier TAS5707.
3. HDMI signal flow
via matched resistance is fed to MT5385 to bass
be transform into digital I2S signal
and sent
Two HDMI video signals are directly fed to the master control IC MT5385 to digital decode, image
scale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in
adjust and volume control, the sound signal will
bass
sent to digital amplifier TAS5707.
be transform into digital I2S signal
MT5385
4. USB signal flow
USB signal via USB connector sent to
MT5385, then output
image scale, then send to LVDS level drive for panel display.
Sound signal of USB signal
volume control, the sound signal will
amplifier TAS5707.
5. SPDIF signal flow
The master control IC MT5385 will transfer digital sound signal out by format Dobly Digital or PCM.
MT53 85 and its
R/G/B of 24 bit to back end module to Video decode,
A/D conversion to
YPbPr
output
for
de-interlace and
via
matched resistance
be transform into digital I2S signal
and
sent to MT5385 to bass adjust and
and sent to digital
to
and
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4. Specifications
13
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5-1 Block Diagram
EE:
SPE39T 39” Block Diagram
A70 60Hz Models by
MTK MT5835 Platform
H5TQ1G63DFR-PBC
MX25L12845EMI-10G
IF +/-
Tuner
LG
TDSTH021F
5-1 Block Diagram
ANT /
CABLE
Power board:FSP
DDR3 1G-1600
Flash 16MB
CVBS/Y Pb Pr
& Audio R/L
Y
Pb
Pr
L
R
COLOR STREAM HD
& COMPOSITE IN
& Audio R/L in
WXGA :2x10
Full-HD :2x20
Panel out
R_out
Audio
AMP
TAS5707
Audio I2S output
L_out
DTV system IC
MTK
MT5385
S/PDIF
Enable
ARC
Buffer
EEPROM 64KB
24C32
Crystal
27MHz
IR
SPE39T 39” Block Diagram
SPDIF
OUT
HDMI 1
14
HDMI 2
USB
Keypad
IR / LED-R
Board
Page 15
Power Board: FSP
15
Page 16
Power Board: DARFON
16
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IC block diagram
1. MT5385
GENERAL FEATURE LIST
Host CPU
ARM11 single core 700MHz
Floating Point Unit
16K I-Cache and 16K D-Cache for ARM11 core
128K L2 Cache
Boot ROM
Boot from serial flash, NAND flash
Supports security boot
JTAG ICE interface
Watch Dog timers
General Copy Protection Unit
Supports CPPM/CPRM
Supports AES with 128/192/256 bit key
Supports AACS
Supports DES/3DES
Supports SHA-1/224/256
Supports MD5
Supports CSS
Supports RC4
Random number generator
Supports multiple color modes
Point, horizontal/vertical line primitive drawings
Rectangle fill and gradient fill functions
Bitblt with transparent options
Alpha blending and optional pre-multiplied alpha composition Bitblt
Stretch Bitblt
YCbCr to RGB color space conversion
Supports index to direct mode bitblt
Image Resizer
Supports 16bpp/32bpp direct color format
Supports 420/422 video format
Supports 420/422/444 JPEG format
Arbitrary ratio vertical/horizontal scaling of video, from 1/128X to 128X
Simple DMA
Supports MMU in OSD mode
OSD Plane
Three linking list OSDs with multiple color mode and all of them have
up-scaler
Supports stereo OSD
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Video Plane
Supports video freeze and over scan
Flesh tone management
Gamma correction
Color Transient Improvement (CTI)
2D Peaking
Saturation/hue adjustment
Brightness and contrast adjustment
Black and White level extender
Adaptive Luma management
Automatic detect video, film and mixed-mode source
3:2/2:2 pull down source detection
Supports FHD motion-adaptive de-interlace
Supports excellent low angle image processing
Brilliant boundary shaping for moving object
Advanced non-linear panorama scaling
Programmable zoom viewer
Progressive scan output
Supports alpha blending for OSD on video plane
Dithering processing for flat panel display
Frame rate conversion
Supports FHD panel and VGA dot-to-dot
Supports PIP/POP, (dual de-interlace, one HD and one SD)
OD (option)
Supports 60Hz Full-HD and WXGA panel over drive
TCON (option)
Flexible timing control with programmable timing
Horizontal timing control
Vertical timing control
Multi-line timing control
Multi-frame timing control
Supports gate power modulation timing
Supports command-based timing
Supports POL inversion every 30 seconds
Supports 1/2/4/8 frame inversion, 1-line inversion, 2-line inversion,
and could up to 255-line dot inversion
Local Dimming
Block division: up to 800 total blocks, up to 100 horizontal blocks
Supports 50K ~ 50M SPI clock rate
MPEG-1 layer I/II decoding
Supports WMA / HE-AAC (option)
Support Dolby DDCO, and MS10 (option)
Dolby Prologic II (option)
Audio output: 5.1ch + 2ch (down mix) + 2ch(bypass)
Pink noise and white noise generator
Equalizer
Bass management
3D surround processing with virtual surround
Audio and video lip synchronization
Supports bass/treble
Automatic volume control
Supports 5-bit (10-channel) main audio I
2
S output interface, each of these channels is up to 24-bit resolution
S/PDIF interface
Supports SPDIF in bypass
SPDIF out
Analog TV IF Demodulator
Supports world-wide analog TV standard
Accept direct IF and low IF
Full digital AGC control and carrier recovery
Embedded SAW filter and IF Amplifier. Cost effective TV front-end
structure and no more cost on:
External analog SAW filters (Video/Audio)
External analog IF demodulator
External peripheral circuit on CVBS signal data path
External SAW filter and IF VGA on tuner
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Digital TV (ATSC / Open-Cable) Demodulator
Compliant with ATSC digital television standard
Supports SCTE DVS-031 and ITU J.83 Annex B digital CATV standard
Accept direct IF (44 MHz or 43.75 MHz) and low IF (5.38 MHz)
NTSC interference rejection capability
Meet all ATSC/A74 requirements
Excellent adjacent and co-channel rejection capability
Dual digital AGC controls for IF and RF, respectively
Full-digital frequency offset recovery with wide acquisition
range 500KHz for ATSC and 250 kHz for CATV
reception
EIA/CEA-909 antenna interface, both mode A and mode B are
supported
Embedded SAW filter and IF Amplifier. Cost effective TV front-end
structure and no more cost on:
External analog IF demodulator
External SAW filter and IF VGA on tuner
Peripherals
Seven basic serial interfaces: one is for the tuner, three are the masters
for general purpose and two of them can
be active in standby mode, one is the slave for VGA DDC, the
other two extra slave serial interfaces used for
HDMI EDID data
Five PWMs, two of them can be active in standby mode
IR receiver
Real-time clock and watchdog controller
Built-in 2-link USB2.0/1.1, both of them support external hub with 16
endpoints.
Built-in uP for standby mode
Supports SDIO interface
Supports smart card interface
Supports two serial flash or one serial and one NAND flash
Supports 2-input low-speed ADC
Supports boundary scan (JTAG)
IC Outline
LQFP Package 216 pins with E-pad
3.3V/1.2V and 1.8V for DDR2 or 1.5V for DDR3
22
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2. TI TAS5707
20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC
23
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7-1 BLOCK
SPE39T 39-inch Wiring Diagram
24
Page 25
7-2 Wiring Connection
CMI panel
Main board to Panel Main board to Speaker
SPE39T SPE39T
DC02L00720I DC02A00160I
500 mm
Panel side Main board CN1 Main board CN4 Speaker
PKS24020P51 LVDS cable JWT A2006H00-2X20P JWT A2001WR2-4P Color Right
1 NC NC 1 SPK_OUTL+ Red P3 Speaker +
2 NC NC 2 SPK_OUTL- Black P2 Speaker -
3 NC NC Left
4 NC NC 3 SPK_OUTR- Green P5 Speaker -
5 NC NC 4 SPK_OUTR+ White P4 Speaker +
6 NC NC
7 SELLVDS Yellow 28 LVDS_SEL
8 NC NC Main board to IR board/ Key
9 NC NC SPE39T
10 NC NC DC02V04170I
11 GND NC IR:500 mm & Key:900mm
12 ORX0- White 40 TX_AO0N IR board CN1 Main board CN3
L:280 & R:480 mm
13 ORX0+ Black 39 TX_AO0P JWT A2001WR2-11PColor JWT A2001WR2-5P
14 ORX1- White 38 TX_AO1N 1 VCC3V3_STB Red 1 VCC5_0_STB
15 ORX1+ Brown 37 TX_AO1P 2 IRR White 2 IRR
25
Page 26
16 ORX2- White 36 TX_AO2N 3 GND Black 3 GND
17 ORX2+ Red 35 TX_AO2P 4 LED_G Orange 4 LEDG
18 GND Black 15 GND NC 5 LEDR
19 OCLK- White 34 TX_AOCKN NC 6 Light_S_C
20 OCLK+ Orange 33 TX_AOCKP NC 7 Light_S_D
21 GND Black 16 GND 1 GND Black 8 GND
22 ORX3+ White 32 TX_AO3N 2 Power Red 9 Power Key
23 ORX3- Yellow 31 TX_AO3P 3 SAR0 Orange 10 SAR0
24 NC NC 4 SAR1 Yellow11 SAR1
25 NC NC
26 NC NC
27 NC NC
28 ERX0- White 12 TX_AE0N
29 ERX0+ Black 11 TX_AE0P
30 ERX1- White 1 TX_AE1N
31 ERX1+ Brown 9 TX_AE1P
32 ERX2- White 8 TX_AE2N
33 ERX2+ Red 7 TX_AE2P
34 GND Black 17 GND
35 ECLK- White 6 TX_AECKN
36 ECLK+ Orange 5 TX_AECKP
37 NC Black 18 GND
38 ERX3- White 4 TX_AE3N
39 ERX3+ Yellow 3 TX_AE3P
26
Page 27
40 NC NC
41 NC NC
42 GND NC
43 GND NC
44 GND Black 25 GND
45 GND Black 26 GND
46 GND Black 27 GND
47 NC NC
48 VCC Red 19 LVDS_PWR
49 VCC Red 20 LVDS_PWR
50 VCC Red 21 LVDS_PWR
51 VCC Red 22 LVDS_PWR
27 28
Page 28
Main board to Power board:
Page 29
8 . T rouble shooting
1. Fault clearance
Before calling your dealer or service center for assistance, check the matters below once again.
(1) Make sure you have connected LED TV to your equipment as described in the section
“ CONNECTING LED TV”.
(2) Check cable connection. Verify that all external equipment and power cord are properly
connected.
(3) Verify that all power is switched on.
(4) If LED TV still does not produce an image, re-start the external equipment.
(5) If the image still does not appear, unplug LED TV from the external equipment and check the
external equipment. The problem may be with your graphics controller rather than with LED TV.
(When you reconnect LED TV, remember to turn the external equipment and TV off before you
power up LED TV. Power the equipment back on in order of LED TV and external equipment.)
(6) If the problem still exists, check the following chart.
Problem Try these Solutions
NO POWER
Remote
Control does
not work
No image
No sound
There are tiny
black points
and/or bright
point on the TV
Abnormal
color of image
Plug this LED TV into the AC outlet.
Press POWER button on side control or on Remote Control to turn on LED TV.
Check POWER Indicator. If this indicator blank, this TV has getting trouble.
Check the batteries.
Make sure nothing is between the Remote Receiver and the Remote Control.
Make sure you are not too far from LED TV when using Remote Control.
Maximum operating range is 5m.
Is direct sunlight or strong artificial light shining on LED TV‘s Infrared Remote
Receiver? Eliminate the light by closing curtains, pointing the light in a different
direction, etc.
Check the connection between the external equipment and LED TV.
When turning LED TV on, it takes within 7 seconds (ATV mode) to display the
image.
Check the system that you select is corresponding with the external equipment
or the video equipment.
Make sure the temperature is not out of the Operating Temperature (0°C ~
40°C).
Turn off power, then turn on again, re-start LED TV.
Check Audio cable connection from Audio input source.
Adjust the Sound System.
Press VOLUME (+) button.
Press MUTE button.
Dark or bright points of light (red, green, or blue) may appear on the screen.
This is a characteristic of the LED panel, not a malfunction of the LED TV.
LED panel is produced with very high accuracy technology. There is 99.99% or
more dot pixel, but there is also 0.01 % or less of dot pixel lack or dot pixel that
is constantly lighted. This is not defect.
Regarding LED panel characteristic, it may occur picture remain (look like a
mirror) when the screen is changed if it displays same screen for a long time.
Changing the picture or turn-off the power supply may recover.
Stripe pattern (more, interference stripes) may show up on the screen depends
on the reflected picture.
Adjust the value of color.
Select different color system.
29
Page 30
2. Troubleshooting guide
The flow chart shown below will help you to troubleshoot your Televison set with it doesn’t display
normally. Each procedure offers a simple way to check for system errors. Before starting, ensure
that there is a signal in and that the Televison is turned on.
2-1 Power LED no light
30
Page 31
2-2 Has audio but no video out
2-3 Has video but no audio out step 1
31
Page 32
2-4
Has video but no audio out step 2
32
Page 33
9.SCHEMATIC DIAGRAM
--ELECTRON
Page 34
PCB1
PCB1
5
4
3
2
1
MT5385 Power Tree
(12V)AMP_VCC
DD
+12V
5V_SW
+5VSB
VTV-L32616 REV:1
VTV-L32616 REV:1
FW1
FW1
FIRMWARE
FIRMWARE
FW L32616
FW L32616
E1
E1
CC
EMIcover-50x68mm/NC
EMIcover-50x68mm/NC
BB
FB20
Q15
LMBT3904LT1G
FB22(LVDS_PWR_EN)
(NC)
(Option)
U1
AX3518ESA
POWER_EN
U2
AX1007E33A
SOT-223
Q2
LMBT3904LT1G
VCCK
SOP8-T5
SOT-23B
FB1FB2
FB3
SOT-23B
For AMP
FB4
Q1
DMP2160U
U14
DMG4435SSS
(1.2V)
VCCK
(About 3.2A)
(3.3V)
3V3SB
SOT-23GDS
SOP8
LVDS_PWR
FB21
R39
R41
FB5
AVDD33_XTAL_STB
AVDD33_REG_STB
(5V)
5V_SW
For Panel
FB17+5V_USB0
For USB
U3
AX1117ADA
TO-252
+5V_USB0 => About 500mA
(3.295V)(3.295V)
DVDD3V3FB6
U5
AVDD3V3
R8
R9
(Option)(NC)
FB7AVDD1V2
AX1007E12A
SOT-223
R21AVDD33_MEMPLL
R29AVDD33_DEMOD
R24AVDD3V3_HDMI1
FB10
(1.2V)
AVDD12_RGBR30
R31
AVDD12_DEMOD
AVDD1V2_HDMI1R28
AVDD33_PLLGPR39
ADAC_3V3R15
AVDD33_DACR20
FB11AVDD33_AADC
U4
AX1117ADA
TO-252
U13
FB19
AX1117AD33A
TO-252
AA
FB9FB8DDRV
(3.3V)
+3.3V_TUNER
(1.5V)
For DDR3 Power
FB18+3.3V_TUNER_1
For Tuner
(About 330mA)
COMPAL OPT OELECTRONICS CO., LTD
COMPAL OPT OELECTRONICS CO., LTD
COMPAL OPT OELECTRONICS CO., LTD
Title
Title
Title
SCHEMATIC,M/B VTV-L32616
SCHEMATIC,M/B VTV-L32616
SCHEMATIC,M/B VTV-L32616
Size Document NumberRev
Size Document NumberRev
Size Document NumberRev
Date:Sheet
Date:Sheet
5
4
3
2
Date:Sheet
XXXXXX
XXXXXX
XXXXXX
1
1
1
1
of
of
of
111Tuesday, November 27, 2012
111Tuesday, November 27, 2012
111Tuesday, November 27, 2012
Page 35
5
4
3
2
1
Buck Conve rter 4A
+5VSB
FB1
FB1
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
DD
ELNA SE100uF/16V
ELNA SE100uF/16V
POWER_EN11
L1
L1
SCD0403T-2R2M 2. 2uH/3.8A
REF
7
LX
4
FB
2
SCD0403T-2R2M 2. 2uH/3.8A
C2 15pF/50V/0402C2 15pF/50V/0402
RA
R3332K/1%R3332K/1%
R4634K/1%R4634K/1%
RB
C7
C7
0.1uF/10V/0402
0.1uF/10V/0402
U1 AX3518ESAU1 AX3518ESA
8
R1
10/1%R110/1%
C3
C3
+
+
C4
C4
0.1uF/10V/0402
0.1uF/10V/0402
C6
C6
0.1uF/10V/0402
0.1uF/10V/0402
R2
10/1%R210/1%
R6
100K/1%R6100K/1%
VIN
1
VCC
5
EN
PGND
GND
THEM_PAD
6
3
9
FB2
FB2
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
C5
C5
22uF/6.3V/0805
22uF/6.3V/0805
Vout=0.8Vx (1+RA/RB)
(1.2V)
VCCK
C1
C1
0.1uF/10V/0402
0.1uF/10V/0402
+3.3V_Standby power (3V3SB)
U2
+5VSB
FB3
FB3
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
10uF/16V/0805
10uF/16V/0805
C8
C8
+
+
U2
AX1007E33A
AX1007E33A
VIN3VOUT
C9
C9
0.1uF/10V/0402
0.1uF/10V/0402
VOUT
GND/ADJ
1
C13
C13
10uF/6.3V/NC
10uF/6.3V/NC
100mA
FB4
2
4
R5
249/1%/NCR5249/1%/NC
RA
RB
R70R7
0
C10
C10
+
+
ELNA SE100uF/16V/NC
ELNA SE100uF/16V/NC
FB4
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
C11
C11
C12
C12
4.7uF/6.3V
4.7uF/6.3V
0.1uF/10V/0402
0.1uF/10V/0402
3V3SB
+5V_Nomal power (5V_SW)
+5VSB
CC
R10
B
R10
47K/1%
47K/1%
C
Q2
Q2
E
LMBT3904LT1G
LMBT3904LT1G
VCCK
Strapping mode :Must
default Pull low.
POWER_EN :
High => 1.2V_SW POWER ON
Low => 1.2V_SW POWER OFF
R12
R12
100K/1%
100K/1%
0.1uF/10V/0402/N C
0.1uF/10V/0402/N C
C24
C24
1uF/6.3V/0402
1uF/6.3V/0402
C14
C14
U16
U16
1
S1
2
S2
3
S3
G4D1
DMG4435SSS/NC
DMG4435SSS/NC
G
3/1 ,3/2 Modify
Q1
Q1
DMP2160U
DMP2160U
8
D4
7
D3
6
D2
5
DS
+
+
ELNA SE100uF/16V
ELNA SE100uF/16V
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
C17
C17
C15
C15
0.1uF/10V/0402
0.1uF/10V/0402
FB5
FB5
5V_SW
C16
C16
4.7uF/16V/0805
4.7uF/16V/0805
+3.3V_Digital power (DVDD3V3)
400mA
5V_SW
FB6
FB6
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
10uF/16V/0805
10uF/16V/0805
C20
C20
+
+
U3
U3
AX1117ADA
AX1117ADA
C18
C18
0.1uF/10V/0402
0.1uF/10V/0402
VIN3VOUT
ADJ / GND
1
C23
C23
10uF/6.3V/NC
10uF/6.3V/NC
(3.295V)
DVDD3V3AVDD3V3
2
R11
R11
110/1%
110/1%
RA
C21
C21
+
+
R13
R13
RB
180/1%
180/1%
ELNA SE100uF/16V/NC
ELNA SE100uF/16V/NC
R80/1%/0805R80/1% / 0805
R90/1%/0805/N CR90/1%/0805/N C
C22
C22
C19
C19
10uF/10V/0805
10uF/10V/0805
0.1uF/10V/0402
0.1uF/10V/0402
VO=1.25Vx(1+RB/RA)+IadjxR2
BB
FB10
FB10
(1.2V)
100mA
AVDD1V2
+1.5V_DDR3 power (DDRV)
U4
U4
AX1117ADA
5V_SW
FB8
FB8
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
10uF/16V/0805
10uF/16V/0805
C27
C27
+
+
AX1117ADA
C25
C25
0.1uF/10V/0402
0.1uF/10V/0402
VIN3VOUT
ADJ / GND
1
C35
C35
10uF/6.3V/NC
10uF/6.3V/NC
(1.5V)
DDRV
FB9
2
R14
R14
110/1%
110/1%
RA
R16
R16
RB
22/1%
22/1%
FB9
CLS UPB201212T-121Y-N 5A
CLS UPB201212T-121Y-N 5A
C26
C26
C28
C28
10uF/10V/0805
10uF/10V/0805
0.1uF/10V/0402
0.1uF/10V/0402
C29
C29
+
+
ELNA SE100uF/16V/NC
ELNA SE100uF/16V/NC
+3.3V_Analog power (ADAC_3V3)+1.2V_Analog power (AVDD1V2)