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Sharp LC-60LE450U/LC-60LE452U Service manual
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LED COLOR TELEVISION
SERVICE MANUAL
LC-60LE450U/LC-60LE452U
60” FHD 120HZ LED TV
.
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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……………………………………………………………………………………..8
3.5 Tearing off the LVDS cable with silicon………………………………………………………….9
4. Basic schematic of port
4.1 Power circuit……………………………………………………………………………………….10
4.2 Reset circuit………………………………………………………………………………………..12
4.3 IR&KEY circuit……………………………………………………………………………………..13
4.4 VGA INPUT………………………………………………………………………………………...14
4.5 SPDIF OUTPUT…………………………………………………………………………………...14
4.6 AV& YPBPR……………………………………………………………………………………….15
4.7 HDMI Circuit……………………………………………………………………………………….16
4.8 USB Circuit………………………………………………………………………………………...17
4.9 AMP Circuit………………………………………………………………………………………...17
4.10 Main controller MSD3393LU…………………………………………………………………...18
5. Trouble shooting table
5.1 Power Troubleshooting…………………………………………………………………………...19
5.2 Display Troubleshooting………………………………………………………………………….20
5.3 Audio Troubleshooting…………………………………………………………………………….22
5.4 Function Troubleshooting………………………………………………………………………...23
6. Software update procedure
6.1 Enter factory menu mode method……………………………………………………………….29
6.2 Software update procedure………………………………………………………………………29
7. Connector define………………………………………………………………………………………..31
8. Critical components list
8.1 Critical components list for Main Board…………………………………………………………34
8.2 Critical components list for Power Board……………………………………………………….35
9. Mechanical Explosion Diagram
9.1 TV Set Explosion Diagram………………………………………………………………………..42
9.2 Packing Explosion Diagram………………………………………………………………………44
10. SUPPLIED ACCESSORIES………………………………………………………………………….45
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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
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
BEFORE RETURNING THE RECEIVER 1 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
resistor paralleled by a 0.15uF capacitor in series
with all exposed metal cabinet parts and a known
T5.0AH (5.0A,250V)
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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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2、System block
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3. Disassembly the TV set method
3.1 Disassembly stand unit and Rear cabinet Ass’y.
Step 1 Remove 6 pcs lock screws ① and detach the Plastic Base Stand Componet ②
Step 2 Remove 15 pcs lock screws ③ , 1 pcs lock screw ④ , 6 pcs lock screws ⑤ ,
4 pcs lock screws ⑥ , 6 pcs lock screws ⑦ and detach the Rear Cabinet Ass’y⑧
The detail screws sign as following picture3.1
Picture 3.1
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3.2 Disassembly the metal parts and attached Ass’y.
Removing the screen bridge piece L/R, Bracket of base, Speaker Bracket L/R, Speaker,
IR Board, Presses key module, Hanging bracket, Front Cabinet Assembly.
Step 1 Remove 5 pcs lock screws ① and detach the screen bridge piece L/R ②/③
Step 2 Remove 6 pcs lock screws ④, 2 pcs lock screws ⑤ and detach the bracket of base ⑥
Step 3 Remove 16 pcs lock screws ⑦ and detach the hanging bracket ⑧
Step 4 Remove 4 pcs lock screws ⑨ and detach the Speaker bracket L/R
○
11 /○12
Remove 4 pcs lock screws ⑩ and detach the speaker
○
13
Step 5 Remove 5 pcs lock screws
○
14; Remove the IR Board cable ○15, Presses key module ○16
and detach the Front Cabinet Assembly
○
17
The detail screws and parts sign as following picture3.2
Picture 3.2
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3.3 Disassembly the Power, Main, 120Hz board, board support and I/O terminal bracket.
Step 1 Remove 8 pcs lock screws ① and detach the power board assembly ②
Step 2 Remove 4 pcs lock screws ③ and detach the 120Hz board ④
Step 3 Remove 4 pcs lock screws ⑤, 2 pcs lock screws ⑥ and detach the main board ⑦
Step 4 Remove 4 pcs lock screws ⑧ and detach the main board support ⑨
Step 5 Remove 2 pcs lock screws ⑩ and detach the I/O terminal bracket
○
11
The detail screws and parts sign as following picture3.3
Picture 3.3
3.4 Harness picture
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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
Photo 3.7 Photo 3.6
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4 Basic schematic of port
4.1 Power circuit
4.1.1 Power Input
4.1.2 Power Supply
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4.1.3 Inverter
4.1.4 Tuner power
4.2 Reset circuit
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4.3 IR&KEY circuit
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4.4 VGA INPUT
4.4.1 VGA Interface
4.4.2 PC Audio
4.5 SPDIF OUTPUT
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4.6 AV& YPBPR
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4.7 HDMI circuit
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4.8 USB Circuit
4.9 AMP Circuit
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4.10 Main controller MSD3393LU
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5 Trouble shooting table
5.1 Power Troubleshooting
Check the power
NG
Check the external power
supply（12V/5V/5VS）
OK
Check the voltage
(3.3V) of U8
NG
OK
Repair the
electric circuit
NG
Check the
voltage (1.8V) of
U4
Repair the
electric
OK
1.Check the voltage (5V)
2.Check the voltage (1.2V) of U6
3.Check the voltage (3.3V) of U8
4.Check the voltage (1.8V) of U4
NG
1.Repair the electric circuit (5V)
2.Repair the electric circuit (1.2V) of U6
3.Repair the electric circuit (3.3V) of U8
4.Repair the electric circuit (1.8V) of U4
Main Board
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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
Change the LED/LCD panel
OK
1.Check J2
2.Check the LVDS signal of
J2
NG
Check LED/ LCD
panel
NG
OK
1.Check the connection of J2
2.Check the circuit of PCB
3.Change U8
OK
1.Change the correct
LVDS Cable
2.Connect the LVDS Cable
correctly
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
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5.2.2 Display Troubleshooting (White Screen)
5.2.3 Display Troubleshooting (Black Screen)
Check the voltage of
1st/2nd/3rd pin of J2
NG
Check the LVDS signal
circuit of J2
OK
Check the external
circuit of Q1
NG
OK
Check the cables
Repair the circuit of
1st/2nd/3rd pin of J2
1.Check the driving
voltage of power board
2.Check the backlight
1.Change power board
2.Change backlight board
OK
NG
OK
NG
Repair the LVDS
signal circuit of J2
Check the screen
voltage of J2
Repair the
external
NG
Change
Q1
OK
Change
U8
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5.3 Audio Troubleshooting（No Sound）
OK
Check the signal between
CPU and amplifier IC
NG
OK
NG
Change U2
1. Repair the circuit between
CPU and amplifier IC
2. Change U2
Change or Debug
the Audio input
OK
Check the Audio
input
NG
Check if it is
on Mute
OK
Turn off Mute
OK
Check J8 Audio output
NG
1.Check the connection of
. speaker cables
2.Check the speakers
Check the voltage
(12V) of U2
NG
Repair the voltage (12V)
circuit of U2
OK
1. Check the voltage (12V) of Pin 15.16 of U2
2. Check the voltage (12V) of Pin 27.28 of U2
NG
3. Repair the circuit of Pin
15.16.27.28 of U2
4. Change U2
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5.4 Function Troubleshooting
5.4.1 Function Troubleshooting（No work）
No work
1.Keyboard no work
2.R/C no work
NG
Check the
software
OK
Update the correct
software
OK
OK
Change U3
NG
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
NG
1.Check the timing signal
2.Check the reset circuit
1.Repair the timing signal
2.Repair the reset circuit
OK
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5.4.2 Function Troubleshooting（No Search Channels）
OK
OK
OK
NG
1.Repair U7 timing circuit
2.Repair U3 timing circuit
1.Check U7 timing signal
2.Check U3 timing signal
1.Repair U7 or U3 I2C circuit
2.Check the connection of U7 or U3
3.Change U7 or U3
1.Check U7 I2C
2.Check U3 I2C
1.Repair the U5 voltage (3.3V)
2.Repair the U7 voltage (3.3V)
1.Check the U5 voltage (3.3V)
2.Check the U7 voltage (3.3V)
Debug RF
signal machine
No Search
Check RF signal
OK
NG
NG
NG
OK
1.Check the connection of U7
2.Check the connection of U3
NG
1. Welding U7
2 .Welding U3
OK
Change U3
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5.4.3 Function Troubleshooting（PC problem）
Change U3
NG
OK
OK
NG
OK
OK
OK
OK
NG
NG
NG
OK
OK
OK
OK
OK
OK
PC problem
Check the input machine
Repair the PC
synchronizing
signal circuit
Check the PC
synchronizing
signal
Change U3
Repair the PC
synchronizing
signal circuit
Check the PC
synchronizing
signal
PC picture not in
center
Change PC input cable
Debug the input
Check PC input cable
No signal
ADC Adjustment
PC picture
ADC adjustment
Picture not in
Repair
RGB
Check RGB
circuit
PC lose colour
ADC adjustment
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5.4.4 Function Troubleshooting（HDMI、AV）
OK
NG
OK
NG
Check HDMI
connector
Change HDMI
OK
Check the input
Change the cable
NG
OK
OK
Repair HDMI
circuit
NG
Change U3
AV No signal
Change U3
Change the cable
NG
NG
NG
Check AV
circuit
Debug the signal
OK
Check the input
signal
Repair AV circuit
OK
Check the input
OK
OK
Check the input
signal
HDMI No signal
Check HDMI
circuit
Debug the signal
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5.4.5 Function Troubleshooting（YPbPr）
YPbPr No signal
YPbPr lose colour
NG
Check the
input cable
OK
ADC
OK
Check YPbPr circuit
NG
Check the
input cable
Change the
input cable
NG
OK
OK
OK
Check the
signal input
NG
NG
Check the
signal input
Debug the
input signal
OK
Repair YPbPr circuit
OK
Change U3
NG
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5.4.6 Function Troubleshooting（USB，SPDIF）
Check if there are
multimedia files in
USB No signal
Repair the
USB circuit (5V)
OK
Change U3
OK
NG
Put the correct
multimedia files
OK
NG
Check USB
OK
Change USB
NG
Check the USB
voltage (5V)
OK
Repair the USB
circuit (5V)
Check USB
circuit
NG
SPDIF No signal
Check SPDIF
connector
NG
OK
Change
SPDIF cable
Check SPDIF
cable
NG
OK
NG
Check SPDIF
signal input
OK
Change U3
Debug SPDIF
signal input
OK
Repair SPDIF
circuit
Check SPDIF
circuit
NG
OK
Change SPDIF
connector
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6. Software update procedure
6.1 Enter factory menu mode method
6.1.1 Press “MENU + 0000” display factory menu as photo 6.1
This factory menu contain following functions
1) Check software Version as photo 6.2
2) VGA or Ypbpr ADC Adjust
3) Initial EEPROM
4) Entering burning mode
5) Factory Reset
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
fail.
3) Make sure put .bin file (the file must begin with ATSC) under the root directory of USB disk in
advance.
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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 " INPUT " to display the Input Source list menu, and then press 2580 4-digit secret
number with the number buttons on the remote control to display the factory menu as
photo 6.3
Step 3 Press " Yes " to start update as photo 6.4 and waiting the update progress as photo 6.5
until show 100%
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
Photo 6.4
Photo 6.5
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7. Connector define
J1. AMPLIFIER POWER SUPPLY CONNECTOR (4PIN/2.54)
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J2.LVDS INTERFACE (2×15PIN/2.0)
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J4. INVERTER CONNECTOR(6PIN/2.0)
J6 BUILT-IN POWER SUPPLY CONNECTOR(10PIN/2.54)
J8. SPEAKER CONNECTOR(4PIN/2.54)/(BTL)
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J12. KEY&IR BOARD CONNECTOR(14PIN/2.0)
8. Critical components list
8.1 Critical components list for Main Board
1、EMC list of key components
number
name
Material Specifications
Supplier
1
IC
MSD3393LU
MST
2
Crystal
24MHz +-20PPM 20PF HC 49US
RS
24MHz +-20PPM 20PF HC 49US
ZG
24MHz +-20PPM 20PF HC 49US
TJ
16MHz +-10PPM 20PF HC 49US
ZG
16MHz +-10PPM 20PF HC 49US
RS
16MHz +-10PPM 20PF HC 49US
TJ
3
Tuner
TDA-18274
NXP
SI2158
SILICONLABS
2、requirements of safety specifications
number
name
Material Specifications
Supplier
1
PCB
CV3393BH-C-11
/
3、Other key components
number
name
Material Specifications
Supplier
1
FLASH
W25Q32
Winbond
GD25Q32
GD
EN25Q32
EON
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2
DDR2 512
NT5TU32M16DG-AC NANYA
NANYA
H5PS5162GFR-S5C HYNIX
HYNIX
K4T51163QJ-BCF7 SAMSUNG
SAMSUNG
W9751G6JB-25 WINBOND
Winbond
3
Audio Amplifier
TPA3110L
TI
8.2 Critical components list for Power Board
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9. Mechanical Explosion Diagram
9.1 TV Set Explosion Diagram
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TV Set Explosion Diagram parts description
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9.2 Packing Explosion Diagram
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10. SUPPLIED ACCESSORIES
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