Sharp LC-60LE644U Service manual
LED COLOR TELEVISION
SERVICE MANUAL LC-60LE644U 60” FHD 120HZ LED TV
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Sharp LC-60LE644U Service manual
Contents IMPORTANT SERVICE SAFETY PRECAUTION……………………………………………………..3 1. Function Diagram………………………………………………………………………………………..4 2. System block……………………………………………………………………………………………..5 3. Disassembly method 3.1 Disassembly stand unit and Rear cabinet Ass’y……………………………………………......6 3.2 Disassembly the metal parts and attached Ass’y……………………………………………….7 3.3 Disassembly the board Ass’y…………………………………………………………………......8 3.4 Harness picture……………………………………………………………………………………..9 3.5 Tearing off the LVDS cable with silicon………………………………………………………….9 4. Basic schematic of port 4.1 Power circuit……………………………………………………………………………………….10 4.2 Reset circuit………………………………………………………………………………………..14 4.3 IR&KEY circuit……………………………………………………………………………………..15 4.4 VGA INPUT………………………………………………………………………………………...16 4.5 SPDIF OUTPUT…………………………………………………………………………………...17 4.6 AV& YPBPR……………………………………………………………………………………….18 4.7 HDMI Circuit……………………………………………………………………………………….19 4.8 USB Circuit………………………………………………………………………………………...21 4.9 AMP Circuit………………………………………………………………………………………...21 4.10 Main controller MSD3393LU…………………………………………………………………...23 4.11 WIFI Circuit……………………………………………………………………………………….24 5. Trouble shooting table 5.1 Power Troubleshooting…………………………………………………………………………...25 5.2 Display Troubleshooting………………………………………………………………………….26 5.3 Audio Troubleshooting…………………………………………………………………………….28 5.4 Function Troubleshooting………………………………………………………………………...29 6. Software update procedure 6.1 Enter factory menu mode method……………………………………………………………….35 6.2 Software update procedure………………………………………………………………………36 7. Connector define………………………………………………………………………………………..38 8. Critical components list 8.1 Critical components list for Main Board…………………………………………………………42 8.2 Critical components list for Power Board……………………………………………………….43 9. Mechanical Explosion Diagram 9.1 TV Set Explosion Diagram………………………………………………………………………..46 9.2 Packing Explosion Diagram………………………………………………………………………48 10. SUPPLIED ACCESSORIES………………………………………………………………………….50 2
Sharp LC-60LE644U Service manual
IMPORTANT SERVICE SAFETY PRECAUTION Service work shoud be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which are as follows: WARNING 1..For continued safety,no modification of any circuit earth ground,such as electrical or electrical ..should be attempted. around connected to an earth ground. 2..Disconnect AC power before servicing. • Use an AC voltmeter having with 5000 ohm per volt, or higher,sensitivity or measure the AC voltage drop across the resistor. • Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop T5.0AH (5.0A,250V) across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.75V peak (this corresponds to 0.5 1 BEFORE RETURNING THE RECEIVER mA. peak AC.) or more is excessive and indicates (Fire & Shock Hazard) a potential shock hazard which must be corrected before returning the monitor to the owner. Before returning the receiver,the user should perform the following safety checks: 1. Inspect all lead dress to make certain that leads are not pinched,and check that hardware is not lodged between the chassis and other metal parts in the receiver. 2. Inspect all protective devices such as non-metallic control knobs,insulation materials,cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks,mechanical insulators,etc. 3. To be sure that no shock hazard exists,check for leakage current in the following manner. · Plug the AC cord directly into a 200 volt AC outlet, and connect the DC power cable into the receiver’s DC jack.(Do not use an isolation transformer for this test) . · Using two clip leads,connect a 1.5K ohm,10 watt
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Sharp LC-60LE644U Service manual
resistor paralleled by a 0.15uF capacitor in series with all exposed metal cabinet parts and a known
1.Function Diagram
1 Function of Board： 1) Image Board(M/B)：Control all input signals, Decode the video signal, De-interlace, and send digital signal (LVDS signal) sent from image Board and display; 2) Panel：Display all image; 3) Key Pad Board： POWER、SOURCE、MENU、Channel -/+、VOL-/+; 4) IR Board ：Receive IR Signal; LED R/G 5) Inverter and Power: the Power Supply for Panel, Image Board;
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Sharp LC-60LE644U Service manual
2〠System block
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Sharp LC-60LE644U Service manual
3. Disassembly the TV set method 3.1 Disassembly stand unit and Rear cabinet Ass’y. Removing the Stand Unit, the Wirer Clamp and the Speaker Cover Left and the Rear Cabinet and the Speaker Cover right. Step 1 Remove 6 pcs lock screws ① and detach the Stand Unit ② Step 2 Remove 1 pcs lock screws ③ , 16 pcs lock screw ⑤, 4 pcs lock screws ⑥ , 8 pcs lock screws ⑦ and detach the Wirer Clamp ④ and the Speaker Cover Left ⑧ and the Rear Cabinet ⑨ and the Speaker Cover right ⑩. The detail screws sign as following picture3.1
Picture 3.1
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Sharp LC-60LE644U Service manual
3.2 Disassembly the metal parts and attached Ass’y. Removing the Wall Mount Bracket, I/O Terminal Bracket Down/Side, the bracket of base, and Speaker. Step 1 Remove 16 pcs lock screws ① and detach the Wall Mount Bracket ②. Step 2 Remove 3 pcs lock screws ③ and detach the I/O Terminal Bracket Down/Side ④/⑤. Step 3 Remove 4 pcs lock screws ⑥ and detach the bracket of base ⑦. Step 4 Remove 4 pcs lock screws ⑧and detach the Speaker assembly ⑨ from the Speaker 11 . Cover left / right ⑩/ ○
The detail screws and parts sign as following picture3.2
Picture 3.2 7
Sharp LC-60LE644U Service manual
3.3 Disassembly the board Ass’y. Removing t the Power Board Unit, the NT72322 120Hz ME/MC Board, the Main Board, the Main Board Bracket, the T-CON Board, the Key board and the IR board. Step 1 Remove 8 pcs lock screws ① and detach the Power Board Unit ②. Step 2 Remove 4 pcs lock screws ③ and detach the NT72322 120Hz ME/MC Board ④. Step 3 Remove 4 pcs lock screws ⑤ and detach the Main Board ⑥. Step 4 Remove 4 pcs lock screws ⑦ and detach the Main Board Bracket ⑧ Step 5 Remove 2 pcs lock screws ⑨ and detach the T-CON Board ⑩. Step 6 Detach the Key Board Assembly 11 . Step 7 Detach the IR Board Assembly 12 . The detail screws and parts sign as following picture3.3
Picture 3.3 3.4 Harness picture 8
Sharp LC-60LE644U Service manual
3.5 Tearing off the LVDS cable with silicon Step 1 Put the art knife aside the LVDS’s connector, and cut the silicon apart. As photo 3.4. Note：Don’t damage the main board and cable when cut the silicon apart with art knife. Step 2 Pull the LVDS cable from the main board, as photo 3.5. Note：To avoid the damage of the pins of LVDS connector, please be care and should be vertical force when pull off the LVDS cable Step 3 Put the art knife aside the main board and cut the silicon apart between the main board and silicon. Remove the silicon. As photo 3.6. Note：Don’t damage the main board and the pin of the connector when cut the silicon apart with art knife. Meantime, don’t leave the foreign substance inside the machine.
Photo 3.4
Photo 3.5
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Sharp LC-60LE644U Service manual
Photo 3.7
Photo 3.6
4 Basic schematic of port 4.1 Power circuit 4.1.1 Power Input
4.1.2 Power Supply
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Sharp LC-60LE644U Service manual
4.1.3 Inverter
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Sharp LC-60LE644U Service manual
4.1.4 Tuner power
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4.2 Reset circuit
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Sharp LC-60LE644U Service manual
4.3 IR&KEY circuit
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Sharp LC-60LE644U Service manual
4.4 VGA INPUT 4.4.1 VGA Interface
4.4.2 PC Audio
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Sharp LC-60LE644U Service manual
4.5 SPDIF OUTPUT
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Sharp LC-60LE644U Service manual
4.6 AV& YPBPR
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Sharp LC-60LE644U Service manual
4.7 HDMI circuit HDMI1
HDMI2
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Sharp LC-60LE644U Service manual
HDMI3
ARC Control
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Sharp LC-60LE644U Service manual
4.8 USB Circuit
4.9 AMP Circuit
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4.10 Main controller RTK2986A
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4.11 WIFI Control
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Sharp LC-60LE644U Service manual
5 Trouble shooting table 5.1 Power Troubleshooting
Check the external power supply（12V/5V/5VS）
NG
Check the power Main Board
NG
Repair the electric circuit
Check the voltage (3.3V) of U3
OK
NG
Repair the electric
OK
Check the voltage (1.1V) of U11 OK
1.Check the voltage (5V) 2.Check the voltage (1.1V) of U11 3.Check the voltage (3.3V) of U3 4.Check the voltage (1.5V) of U4
NG
1.Repair the electric circuit (5V) 2.Repair the electric circuit (1.1V) of U11 3.Repair the electric circuit (3.3V) of U3 4.Repair the electric circuit (1.5V) of U4
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Sharp LC-60LE644U Service manual
5.2 Display Troubleshooting 5.2.1 Display Troubleshooting (Dazzling Screen)
NG
1.Check the LVDS cable 2.Check the connection of the LVDS cable
1.Change the correct LVDS Cable 2.Connect the LVDS Cable correctly
OK
1.Check the screen voltage 2.Check if the software fit with the screen's feature correctly
NG
1.Repair the circuit of screen voltage 2.Update the correct software
OK
NG
Check LED/ LCD panel
Change the LED/LCD panel
NG
OK
1.Check CN1 2.Check the LVDS signal of CN1
1.Check the connection of CN1 2.Check the circuit of PCB 3.Change U3
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Sharp LC-60LE644U Service manual
5.2.2 Display Troubleshooting (White Screen)
Check the screen voltage of CN1
NG
OK
Check the external circuit of Q4
NG
Repair the external circuit of
Check the LVDS signal circuit of CN1
OK
NG
OK
Change U3
Change Q4
Repair the LVDS signal circuit of CN1
5.2.3 Display Troubleshooting (Black Screen)
NG
Check the voltage of 1st/2nd/3rd pin of CN1
Repair the circuit of 1st/2nd/3rd pin of CN1
OK
1.Check the driving voltage of power board 2.Check the backlight NG OK 1.Change power board 2.Change backlight board
Check the cables
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Sharp LC-60LE644U Service manual
5.3 Audio Troubleshooting（No Sound）
NG
Check the Audio input
OK
NG
Change or Debug the Audio input
Turn off Mute
Check if it is on Mute
OK
Check CN15 Audio output
OK
NG
NG
Repair the voltage (12V) circuit of U9
1.Check the connection of . speaker cables 2.Check the speakers
Check the voltage (12V) of U9
OK
1. Check the voltage (12V) of Pin 15.16 of U2 2. Check the voltage (12V) of Pin 27.28 of U2 NG OK 3. Repair the circuit of Pin 15.16.27.28 of U2 4. Change U9
Check the signal between CPU and amplifier IC
NG
1. Repair the circuit between CPU and amplifier IC 2. Change U9
OK
Change U9
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Sharp LC-60LE644U Service manual
5.4 Function Troubleshooting 5.4.1 Function Troubleshooting（No work）
No work
OK
NG
1.Keyboard no work 2.R/C no work
1.Check the Keyboard 2.Check the Remote control board
OK
NG
Check the voltage (5V,3.3V,1.8V,1.2V)
Please check the Power Troubleshooting
OK
NG
1.Check the timing signal 2.Check the reset circuit
1.Repair the timing signal 2.Repair the reset circuit
NG
Update the correct software
OK
Check the software
OK
Change U2
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Sharp LC-60LE644U Service manual
5.4.2 Function TroubleshootingďźˆNo Search Channels
No Search Channels OK NG Check RF signal
Debug RF signal machine
OK
1.Check the U8voltage (3.3V) 2.Check the U7 voltage (3.3V) NG OK 1.Repair the U5 voltage (3.3V) 2.Repair the U7 voltage (3.3V)
NG
1.Check U7 I2C 2.Check U8 I2C OK
NG
1.Repair U7 timing circuit 2.Repair U8 timing circuit
1.Check U7 timing signal 2.Check U8 timing signal
1.Repair U7 or U8 I2C circuit 2.Check the connection of U7 or U8 3.Change U7 or U8
OK
1.Check the connection of U7 2.Check the connection of U8
NG
1. Welding U7 2 .Welding U8
OK Change U2
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Sharp LC-60LE644U Service manual
5.4.3 Function Troubleshooting（PC problem）
PC problem
OK NG
Check the input machine
Debug the input
OK NG Check PC input cable Change PC input cable
OK
PC lose colour
Picture not in
OK
PC picture
No signal
OK
OK
OK
Check RGB circuit
PC picture not in center NG
Check the PC synchronizing signal
NG
Check the PC synchronizing signal
NG
OK OK
Repair RGB
ADC adjustment
ADC adjustment
OK
ADC Adjustment
OK
Change U2
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Repair the PC synchronizing signal circuit
OK
Change U2
Repair the PC synchronizing signal circuit
Sharp LC-60LE644U Service manual
5.4.4 Function Troubleshooting（HDMI、AV）
HDMI No signal
AV No signal OK
OK NG
Check the input signal
Check the input signal
Debug the signal
Debug the signal OK
OK NG
Change the cable NG
Change HDMI
NG
Repair HDMI circuit
NG
Check the input
Check the input
OK Check HDMI connector
OK
Check AV circuit
OK
Check HDMI circuit
OK Change U2
OK Change U2
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NG
Change the cable NG
Repair AV circuit
Sharp LC-60LE644U Service manual
5.4.5 Function Troubleshooting（YPbPr）
YPbPr No signal
YPbPr lose colour
OK
OK Check the signal input
NG
Debug the input signal
NG
Check the signal input OK
OK
Check the input cable
NG
Check the input cable
NG
Change the input cable
OK
ADC NG
OK
Check YPbPr circuit
NG
OK
Change U2
Repair YPbPr circuit
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Sharp LC-60LE644U Service manual
5.4.6 Function Troubleshooting（USB，SPDIF）
USB No signal
SPDIF No signal OK
OK NG
Put the correct multimedia files
Check if there are multimedia files in
Check SPDIF signal input
Check USB
Debug SPDIF signal input
OK
OK NG
NG
Check SPDIF cable
NG
OK
Change USB
Change SPDIF cable
OK NG
Repair the USB circuit (5V)
NG Repair the USB circuit (5V)
Check the USB voltage (5V)
Check SPDIF connector
OK Check USB circuit
Change SPDIF connector
OK Check SPDIF circuit
OK Change U2
NG
OK Change U2
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NG
Repair SPDIF circuit
Sharp LC-60LE644U Service manual
6. Software update procedure 6.1 Enter factory menu mode method 6.1.1 Press “INPUT + 0000� display factory menu as photo 6.1 This factory menu contain following functions 1) ADC Adjust 2) Others 3) Lan Test 4) Wifi Test 5) Aging Mode 6) Init EEPROM 7) Factory Reset 8) Version Info
Photo 6.1
Photo 6.2
6.2 Software update procedure
6.2.1 Software update cautions 1) Do not remove the USB memory device or unplug the AC cord while the software is being updated 2) Be sure to properly follow the whole procedure described below, step by step. Otherwise, For example, the TV can not read the data in the USB memory device and software updating will 35
Sharp LC-60LE644U Service manual
fail. 3) Make sure put .IMG file (the file must begin with ATSC) under the root directory of USB disk in advance.
6.2.2 Software update steps Step 1 Insert the USB memory device with the update file into the Service terminal on the TV. Step 2 Press " MENU " to display interface , and Choose “information”
as photo 6.3
Step 3 Press " Software Update" ---->”Manual Update”--->USB Update--->”YES’ to start update as photo 6.4 and waiting the update progress as photo 6.5 until “install all’. Step 4 Remove the USB memory device Step 5 Turn off
the power and unplug the AC cord. Plug the AC cord again and turn the power
back on.
Photo 6.3
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Sharp LC-60LE644U Service manual
Photo 6.4
Photo 6.5
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Sharp LC-60LE644U Service manual
7. Connector define
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Sharp LC-60LE644U Service manual
CN20. AMPLIFIER POWER SUPPLY CONNECTOR (4PIN/2.54)
CN1.LVDS INTERFACE (2×15PIN/2.0)
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Sharp LC-60LE644U Service manual
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Sharp LC-60LE644U Service manual
CN3. INVERTER CONNECTOR(6PIN/2.0)
CN4. BUILT-IN POWER SUPPLY CONNECTOR(10PIN/2.54)
CN15. SPEAKER CONNECTOR(4PIN/2.54)/(BTL)
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Sharp LC-60LE644U Service manual
J12. KEY&IR BOARD CONNECTOR(14PIN/2.0)
8. Critical components list 8.1 Critical components list for Main Board
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Sharp LC-60LE644U Service manual
8.2 Critical components list for Power Board 8.2 Critical components list for Power Board
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Sharp LC-60LE644U Service manual
9. Mechanical Explosion Diagram 9.1 TV Set Explosion Diagram
TV Set Explosion Diagram parts description
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Sharp LC-60LE644U Service manual
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Sharp LC-60LE644U Service manual
9.2 Packing Explosion Diagram
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Sharp LC-60LE644U Service manual
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Sharp LC-60LE644U Service manual
10. SUPPLIED ACCESSORIES
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