Page 1
SERVICE MANUAL LED COLOR TELEVISION MODEL: LC-39LE440U LC-50LE440U...
Page 2
CONTENTS SAFETY PRECAUTION IMPORTANT SERVICE SAFETY PRECAUTION................. ………………………2 CHAPTER 1. SPECIFICATIONS [1] SPECIFICATIONS ..........................4 [2] DIMENSIONS............................5 CHAPTER 2. REMOVING OF MAJOR PARTS [1] REMOVING OF MAJOR PARTS ......................7 CHAPTER 3. ADJUSTMENT PROCEDURE [1] ADJUSTMENT PROCEDURE ......................23 [2] SERVICE MODE..........................
Page 6
[2]DIMENSIONS LC-39LE440U VESA-compatible wall TV screen size (Inches) Screw type bracket (millimeters)(W*H) 39'' 400*400mm Metric 8*14mm...
Page 7
LC-50LE440U VESA-compatible wall TV screen size (Inches) Screw type bracket (millimeters)(W*H) 50'' 400*400mm Metric 8*14mm...
Page 8
CHAPTER 2. Removing of Major Parts LC-39LE440U 1. Assy/Panel Removal Notes: Please put your machine on soft material to avoid scrape panel when you disassemble it. Front view Fig.1 Back view Fig.2 Step1. Remove the Base Assy. Remove the 4 screws as Fig.3 and pull out the base .
Page 9
Step 2. Remove the REAR COVER Assy. 1. Remove the 9 screws, around the REAR COVER as Fig.4. Fig.4...
Page 10
2. Remove the 3 screws at the IO area as Fig.5. Fig.5 3. Remove the 3 screws to release AC cable as Fig.6 .Fig.7 Fig.6 Fig.7...
Page 13
Step3. Remove the Main, Power, IR board, Key Pad ASSY, and the Speakers. Fig.8 1. Remove the 8 screws and disconnect 4 cables .Detach the Main board ASSY as Fig.9 Fig.9...
Page 14
2. Remove the 4 screws and 2 Cables. Detach the Power board as Fig.10. Fig.10 3. Detach the IR board as Fig.11. Fig.11...
Page 15
4. Remove the 1screws.Detach the Key Pad ASSY as Fig.12. Fig.12...
Page 16
5. Detach the Speakers as Fig.13. Fig.14. Fig.13 Fig.14 Step4. Remove BASE SUPPORT. Remove the 6 screws. Detach the BASE SUPPORT as Fig.15 Fig.15...
Page 17
CHAPTER 2. Removing of Major Parts LC-50LE440U 1. Assy/Panel Removal Notes: Please put your machine on soft material to avoid scrape panel when you disassemble it. Front view Fig.1 Back view Fig.2...
Page 18
Step1. Remove the Base Assy. Remove the 4 screws as Fig.3 and pull out the base . Fig.3 Step 2. Remove the REAR COVER Assy. 1. Remove the 19 screws, around the REAR COVER as Fig.4. Fig.4...
Page 19
2. Remove the 3 screws at the IO area as Fig.5. Fig.5 3. Remove the 3 screws to release AC cable as Fig.6 .Fig.7 Fig.6 Fig.7...
Page 20
Step3. Remove the Main, Power, IR board, Key Pad ASSY, and the Speakers. Fig.8 1. Remove the 8 screws and disconnect 4 cables .Detach the Main board ASSY as Fig.9 Fig.9...
Page 21
2. Remove the 4 screws and 3 Cables. Detach the Power board as Fig.10. Fig.10 3. Remove the 1screws. Detach the IR board as Fig.11. Fig.11...
Page 22
4. Remove the 2screws.Detach the Key Pad ASSY as Fig.12. Fig.12 5. Detach the Speakers as Fig.13. Fig.14. Fig.13 Fig.14...
Page 23
Step4. Remove BASE SUPPORT. Remove the 8 screws. Detach the BASE SUPPORT as Fig.15 Fig.15 Step5. Remove PANEL module. 1. Detach the PANEL HOLDER (9 pcs) as Fig .16 Fig.16...
Page 24
CHAPTER 3. ADJUSTMENT PROCEDURE [1]ADJUSTMENT PROCEDURE 1. Main Menu (The default value is marked in red) Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Picture Settings AV Mode User/ Standard/ Movie/ Game/ PC/ Dynamic/ Dynamic(Fixed) Off/ On Disable when AV Backlight...
Page 25
Reset Yes/No xed). (Only reset currect AV mode settings.) Power Control No Signal Off Enable/ Disable Power Saving Off/ On Disable when AV mode is Dynamic(Fi xed). System Options View Option View Mode Freeze Change Audio Mono/ Stereo/ SAP Audio English/ Spanish/ Language French...
Page 26
Caption Style Default/ Caption setup Custom (For TV & AV only) Caption Size Small/ Standard/ Large Foreground Color Black/ White/ Green/ Blue/ Red/ Cyan/ Yellow/ Magenta Foreground Opacity Solid/ Translucent/ Transparent Background Color Black/ White/ Green/ Blue/ Red/ Cyan/ Yellow/ Magenta Background Opacity Solid/...
Page 27
Language English/ Español/ Français Individaul Setup Secret No. New Secret No. (Input Secret Confirm Secret No.) (For TV & AV Parental CTRL V-Chip MPAA G/ PG/ only) PG-13/ R/ NC-17/ X/ NONE TV Guidelines TV-Y/ TV-Y7/ TV-G/ TV-PG/ TV-14/ TV-MA/ NONE D, L, S, V, Can.English...
Page 28
2. Display adjustment Only adjust HDMI Mode and copy to all of input source General set-up: Equipment Requirements: Minolta CA-210 or Equivalent Color analyzer or equivalent instrument. Input Signal Type: 1. Internal full white pattern. 2. Select Picture mode to Standard mode and check the x, y data. Input Injection Point: HDMI cable Alignment method:...
Page 29
TV set. 3. Luminance > =240 cd/m in the center of the screen when Brightness control at 100, Contrast control at 100, Backlight control at 100. (For LC-39LE440U Test Color mode: User mode) Luminance>=280 cd/m2 in the center of screen when Brightness control at 100,Contrast control at 100,Backlight control at 100.(For LC-50LE440U ,Test...
Page 30
[3] FACTORY MODE AUTOMATION BEHAVIOR For factory checking channels convenient, so entered factory mode will auto install factory pre-channels to instead of user’s channels table, after exited Factory mode, the pre-channels will be cleared. [4] SOFTWARE UPGRADE PROCEDURE 1. Connect to TV USB port to upgrade the software firmware Please follow the following steps to upgrade the firmware.
Page 31
CHAPTER 4.TROUBLESHOOTING TABLE [1]TROUBLE SHOOTING TABLE The sound is not emitted from the speaker though the picture has come out. No sound output in all models? TEREMINAL TEREMINAL Is the audio signal output of pin (96) (AOSDATA0), pin (95) (AOBCK), pin (94) Check IC U2102 and its peripheral circuits.
Page 32
No sound (during the reception of TV broadcasting) Does not the sound go out though the picture has come out when UHF/VHF is received? MAIN UNIT: Check the tuner and its peripheral circuits. Replace as Is the DIF signal output from pin (10) and pin (11) of required.
Page 33
No sound from external input devices (1) Does not the sound of the audio signal input to input (Component) go out? MAIN UNIT: Is the audio signal properly sent to pin (8) and pin Check the connection to CN1202 and the external (10) of CN1202? input device.
Page 34
No sound from external input devices (2) Does not the sound of the audio signal input to VGA go out? MAIN UNIT: Is the audio signal properly sent to pin (3) and pin Check the connection to CN1102 and the external (2) of CN1102? input device.
Page 35
No sound from external input devices (3) Does not the sound of the audio signal input to USB go out? Is USB stick audio format correct? Change to correct mp3 format MAIN Is the USB +5V Q7105 sent to pin (1) of CN1104? Check the connection to Q7105 and the external input device.
Page 36
The audio signal is not output No audio signal output from Headphone terminal (CN6201). Terminal Is audio signal output from pin (12) (OUTL) and pin Check the connection to HPOL(R) OUT and (3) (OUTR) of IC U6201 to Jack (CN6201)? external devices.
Page 37
The audio signal is not output No audio signal output from SPDIF terminal (CN6202). Terminal Is input source on HDMI? The SPDIF out not Change input source to others (AV, TV, etc.). support HDMI source. Is the audio signal output from IC U2102 pin (92) Check the line between IC U2102 and CN6202.
Page 38
No picture on the display (1) The picture doesn't appear in all modes. Main UNIT: Check LVDS signal output from IC U2102 or not? (O0N/O0p),(O1N/O1P),(O2N/O2P),(O3N/O3P),(OCKN/OCKP), (E0N/E0p), (E1N/E1P), (E2N/E2P), (E3N/E3P), (ECKN/ECKP) Check IC U2102 and its peripheral control circuits. Check signal Check relative components are ok or not.
Page 39
No picture on the display (2) Does not the picture come out when VHF/UHF is received? Main UNIT: Check TU_VCCr/VCCK/DDRV/AV33/DV33/+3V3SB Check each power IC and peripheral is applied to Tuner and U2102 or not. components are correct or not. Is the DIF signal output from pin (10) and pin (11) of Check the tuner and its peripheral circuits.
Page 40
<External input Input (Side HDMI)>No picture on the display (3) Does not the picture display when HDMI cable plugged into HDMI1? Terminal Check the line between pin (78) of IC Is the HOT_PLUG detection function of U2102 and CN8103. pin (19) of HDMI terminal (CN8103) normal? Check the connection and setup with Main UNIT:...
Page 41
<External input Input (Rear_HDMI2)>No picture on the display (4) Does not the picture display when HDMI cable plugged into HDMI 2? Terminal Check the line between pin (7) of IC Is the HOT_PLUG detection function of U2102 and CN8101 pin (19) of a HDMI terminal (CN8101) normal? Check the connection and setup with Is TMDS signal input into pin...
Page 42
<External input Input(Rear HDMI3)>No picture on the display (5) Does not the picture display when HDMI cable plugged into HDMI 3? Terminal Check the line between pin (1) of IC Is the HOT_PLUG detection function of U2102 and CN8102. pin (19) of a HDMI terminal (CN8102) normal? <External Check the connection and setup with Is TMDS signal input into pin...
Page 43
<External input USB>No picture on the display (6) Does not the picture display when USB cable plugged into USB port? Change to correct .jpg or .jpeg or .png or Is USB stick video format correct? .bmp format. Main UNIT: Check the fuse F1101 and the external Is the USB +5V sent to pin (1) of input device.
Page 44
<External input Input (Component)>No picture on the display (7) Does not the picture display when RCA cable plugged into component? Terminal Is Component Y/Pb/Pr signal sent to pin Check the setting of an external input (2)/Y, (4)/Pb, (6)/Pr of CN1202? device that connects of CN1202 Main UNIT: <External input...
Page 45
<External input D-SUB>No picture on the display (8) Does not the picture display when VGA cable plugged into D-SUB ? Set the timing which TV is support Is Video format correct? Terminal Is R/G/B/H/V signal sent to pin (1)/RED, Check the setting of an external input (2)/Green, (3)/BLUE, (14)/H sync#, device that connects of CN1101 Main UNIT:...
Page 46
Power unit operation check Are the power cord and harness in the Power cord and harness in the unit unit connected If F102 normal Line filter unit? LX103 ,LX104 or RT101 is out of order? Does BD101 output 169V when AC Change a new full-wave rectifier diode to input 120V? check the output voltage.
Page 47
CHAPTER5. MAJOR IC INFORMATIONS [1]MAJOR IC INFORMATIONS 1.1. U2102 (MT5389) The MediaTek MT5389FUNU family consists of a DTV front-end demodulator, a backend decoder and a TV controller and offers high integration for advanced applications. It combines a transport de-multiplexer, a high definition video decoder, an audio decoder, a dual-link LVDS transmitter, a mini-LVDS transmitter (option), an EPI transmitter (option) and an NTSC/PAL/SECAM TV decoder with a 3D comb filter (NTSC/PAL).
Page 48
11. LVDS, mini-LVDS (option), EPI (option) 1.2. U3101 ( NT5CB64M16DP Description The 1Gb Double-Data-Rate-3 (DDR3/L) B-die DRAMs is double data rate architecture to achieve high-speed operation. It is internally configured as an eight bank DRAM. The 1Gb chip is organized as 16Mbit x 8 I/Os x 8 banks or 8Mbit x 16 I/Os x 8 bank devices. These synchronous devices achieve high speed double-data-rate transfer rates of up to 1866 Mb/sec/pin for general applications.
Page 49
1.3. U6102 (YAMAHA YDA175) Features ・Supply Voltage Range VDDP 5V*1) to 18V ・Input Digital Audio Interface (Stereo) Sampling Frequency: 32kHz, 44.1kHz, 48kHz Left-justified, MSB first, 1-bit delay, Digital Audio Data 24-bits ・Max. Instantaneous Output 15W×2ch (VDDP=15V, RL=8Ω, THD+N=10%) 10W×2ch (VDDP=12V, RL=8Ω, THD+N=10%) 10W×2ch (VDDP=12V, RL=6Ω, THD+N=10%) ・Max.
Page 50
· Operates With 3-V to 5.5-V VCC Supply · Operates up to 250 kbit/s · One Driver and One Receiver · Low Standby Current . . . 1 μA Typical · External Capacitors . . . 4 ´ 0.1 μF ·...
Page 51
CHAPTER 6.BLOCK DIAGRAM/WIRING DIAGRAM [1]BLOCK DIAGRAM LVDS OUT TUNER H702F 1Gb DDR3 Side HDMI1 Rear HDMI2 8MB FLASH Rear HDMI3 Side MT5389 PC INPUT YDA175 SPEAKER AUDIO AMP YPbPr+CVBS ASPDIF SPDIF Output (NAFTA) Hotel Mode RS 232 (NAFTA) Earphone Earphone amp.DRV632 Side...
Page 52
[2]POWER MANAGEMENT BLOCK DIAGRAM There are 1 part circuits in Power board of this project (fig.1), Power circuits which is a single layer board, There are 3 output in the power parts, one is interface board including USB and TV tuner et; the other is inverter board and audio circuit.+24V output is inverter part.
Page 69
[2]POWER SCHEMATIC DIAGRAM 1) AC Input and EMI Filter:(fig.7) Fig.7 CN101 is a connector for connecting AC Power.F102 is fuse to protect all the circuit AC. Input voltage is single 120V. CY101, CY102, CY103 are used high frequency noise of primary between common GND.LX103,LX104,CX101, CX102 is used to filter low frequency noise.
Page 71
BD101 is a rectifier in which there are 4 build-in diodes, inverting AC to DC. CP110,CP111 is used to smooth the wave from rectifier. FR801 is a fuse resistor to protect the following circuit when inrush current is too large. UM102 is a current-mode PWM controller with excellent power-saving operation, It features a high-voltage current source to directly supply the startup current from two half-wave rectifier diodes further to provide lossless startup circuit.
Page 72
UM102 is powered on to start issuing the gate drive signal , the high-voltage current source is then disabled ,and the Vcc supply current is provided from the auxiliary winding of the transformer PIN3. UM102 Pin3 is protection PIN.RM101 are sense circuit, UM102 detects the MOSFET current, from the CS in.
Page 73
[3]KEY SCHEMATIC DIAGRAM ME. Top Down Sequence (Before 2K12 H1) POWER_KEY INPUT MENU VOL- VOL+ 電阻 PULL HIGH 10K, Tolerance:5% ME. Top Down Sequence ( 2K12 H2) 增加一個 與線材決定是否連接 GND, VOL+ VOL- MENU INPUT POWER_KEY CN901 4P 2.0mm 90° (W/L) ADC1 ADC0 C901...
Page 74
CHAPTER 9.PARTS GUIDE [1] SPARE PARTS LIST LC-39LE440U Recommended Spare Parts List Material 751203T00-600-G Region Description LC-39LE440U Updated date 2012/8/24 Object Item Catalog Component no. Usage Photo description Module,TFT,TV,39I Panel 9JY76040Q800531G nch,1920x1080,30 LC-39LE440U/CTJ 9JY0139CTJ01100 01,Mother Board LC-39LE440U/CTJ 9JY0939CTJ01000 01,Power Board...
Page 75
ASSY FRONT 9JY00900011937 BEZEL,CTJ01 ASSY 9JY01202019594 BASE,CTK03 BASE-SUPPORT, 9JY02500003944 CTJ01 ASSY SIDE 9JY02500013939 BRACKET,CTN02 ASSY BACK 9JY00900011936 Cosmetics COVER,CTJ01 FUNCTION 9JY01201019574 KEY,CTG04 9JY02501022530 SHIELDING ,CTL0 POWER 9JY02500013983 METALl-2,CTJ01 9JY01201019663 COVER,VT464D LCD Cable Cable 9JY35101SV00600G Assembly,1010mm ,+15/-0mm,G...