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LC-20SH1E
SERVICE MANUAL
S04B1LC20SH1E
LCD COLOUR TELEVISION
MODEL LC-20SH1E
In the interests of user-safety (Required by safety regulations in some countries) the set should be re-
stored to its original condition and only parts identical to those specified should be used.
CONTENTS
Page
» IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................ 2
» SPECIFICATIONS ........................................................................................................................................4
» OPERATION MANUAL .................................................................................................................................5
» DIMENSIONS ...............................................................................................................................................7
» REMOVING OF MAJOR PARTS ..................................................................................................................8
» ADJUSTING PROCEDURE OF EACH SECTION ..................................................................................... 12
» TROUBLE SHOOTING TABLE ..................................................................................................................21
» CHASSIS LAYOUT .....................................................................................................................................26
» BLOCK DIAGRAM ......................................................................................................................................28
» OVERALL WIRING DIAGRAM ...................................................................................................................30
» DESCRIPTION OF SCHEMATIC DIAGRAM ............................................................................................. 32
» SCHEMATIC DIAGRAM .............................................................................................................................33
» PRINTED WIRING BOARD ASSEMBLIES ................................................................................................46
» REPLACEMENT PARTS LIST....................................................................................................................61
» PACKING OF THE SET ..............................................................................................................................73
SHARP CORPORATION
LC-20SH1E
IMPORTANT SERVICE SAFETY PRECAUTION
Ë Service work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and the servicing guidelines which follow:
WARNING · Connect the resistor connection to all exposed metal
parts having a return to the chassis (antenna, metal
1. For continued safety, no modification of any circuit cabinet, screw heads, knobs and control shafts,
should be attempted. escutcheon, etc.) and measure the AC voltage drop
2. Disconnect AC power before servicing. across the resistor.
All checks must be repeated with the AC cord plug
CAUTION: FOR CONTINUED PROTECTION connection reversed. (If necessary, a nonpolarized
AGAINST A RISK OF FIRE REPLACE ONLY WITH adaptor plug must be used only for the purpose of
SAME TYPE F6700 (1.25A, 250V), F6701 (1.25A, completing these checks.)
250V), F6702 (1.25A, 250V), F6703 (1.25A, 250V) Any reading of 0.75V peak (this corresponds to 0.5
F6704 (1.25A, 250V) AND F7701 (3.15A, 250V) mA. peak AC.) or more is excessive and indicates a
FUSE. potential shock hazard which must be corrected before
returning the monitor to the owner.
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, 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
DVM
between the chassis and other metal parts in the
AC SCALE
receiver.
2. Inspect all protective devices such as non-metallic 50k ohm
control knobs, insulation materials, cabinet backs, 10W
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.
3. To be sure that no shock hazard exists, check for 0.15 µF
leakage current in the following manner. TEST PROBE
· Plug the AC cord directly into a 220~240 volt AC outlet.
· Using two clip leads, connect a 50k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series with
all exposed metal cabinet parts and a known earth
ground, such as electrical conduit or electrical ground TO EXPOSED CONNECT TO
METAL PARTS KNOWN EARTH
connected to an earth ground. GROUND
· Use an AC voltmeter having with 5000 ohm per volt,
or higher, sensitivity or measure the AC voltage drop
across the resistor.
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SAFETY NOTICE
Many electrical and mechanical parts in LCD television and shaded areas in the Replacement Parts Lists and
have special safety-related characteristics. Schematic Diagrams.
These characteristics are often not evident from visual For continued protection, replacement parts must be
inspection, nor can protection afforded by them be identical to those used in the original circuit.
necessarily increased by using replacement components The use of a substitute replacement parts which do not
rated for higher voltage, wattage, etc. have the same safety characteristics as the factory
Replacement parts which have these special safety recommended replacement parts shown in this service
characteristics are identified in this manual; electrical manual, may create shock, fire or other hazards.
components having such features are identified by " å"
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1 2345678901 2
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2
LC-20SH1E
Precautions for using lead-free solder
1 Employing lead-free solder
"MAIN PWB" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on
the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
LFa
Indicates lead-free solder of tin, silver and copper.
2 Using lead-free wire solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional
lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend
you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit,
contact our service station or service branch in your area.
3 Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead
solder by 40°C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the
PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance
temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering
condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after
every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Part No. # Description Code
ZHNDAi123250E J 0.3mm 250g(1roll) BL
ZHNDAi126500E J 0.6mm 500g(1roll) BK
ZHNDAi12801KE J 1.0mm 1kg(1roll) BM
Precautions on removing the Sub PWB
· CAUTION
Before taking out and servicing the Sub unit, be sure to discharge the C7703 electrolytic capacitor. Otherwise
you may get an electric shock by the capacitor's charging voltage.
3
LC-20SH1E
SPECIFICATIONS
Model
Items LC-20SH1E
LCD panel 20" Advanced Super View& BLACK TFT LCD
Number of dots 921,600 dots
Video colour system PAL/SECAM/NTSC
TV TV-Standard (CCIR) B/G, I, D/K, L/L'
TV-Tuning System Auto preset 200 ch.
STEREO/BILINGUAL NICAM, A2 stereo
AUTO PRESET YES
CATV ~Hyper Band
Brightness 430 cd/m2
Viewing angles H: 170° V: 170°
Audio amplifier 2.1 W × 2
Speakers 11 cm × 4 cm 2 pcs.
Terminals EXT1 21-pin Euro-SCART
EXT2 S-VIDEO, VIDEO, AUDIO
OUT AUDIO
Antenna DIN
Headphones 3.5 mm ø jack (side)
OSD language English/Spanish/German/French/Italian/Swedish/Dutch/Russian/Portuguese/
Turkish/Greek/Finnish/Polish
Power requirement AC 220 V240 V, 50/60 Hz
Power consumption 74 W (1.0 W Standby) AC 220 V240 V
Weight (approx.) 6.3 kg, w/o accessories
I As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product
improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be
some deviations from these values in individual units.
4
Part Names of the Main Unit
The examples used throughout this manual are based on the LC-20SH1E model.
Terminals
Controls How to adjust the angle
AC INPUT
terminal
Upper control panel Rear View
30° Antenna terminal
12°
EXT1
Adjustable range RGB
(21-pin Euro-SCART)
(MAIN POWER)
(Input) Headphone jack
MENU
P( )/( ) (Channel)
()/(+) (Volume)
The screen angle can be tilted backwards AUDIO OUT EXT2 Stand
between 12 and 30 degrees. (It cannot be
set to vertical.) When changing the angle, VIDEO
make sure to hold the stand and adjust the (L) AUDIO (L)
screen to the best viewable angle. AUDIO OUT (R) AUDIO (R)
S-VIDEO
Round lock for Kensington
Security Standard slot
How to Fix the Cables
Pull the cables connected to each terminal. Insert the cables into the stand hole and fix the cables.
5
Stand hole
Speaker
OPC (Optical Picture Control) indicator
OPERATION MANUAL
The OPC indicator lights up green when the "Backlight" is set
to "Auto (OPC)". How to Prevent the LCD TV Set from Falling Over
Remote sensor To prevent the LCD TV set from falling over in case
of earthquakes and so on, strap it onto the wall by 2
OPC sensor threading one end of the string through the loop of
the stand (1) and fastening the LCD TV set with
STANDBY/ON indicator the string attached to the hook on the wall or the
STANDBY/ON indicator lights up green when the power is on, and red when in post, etc. (2).
the standby mode (the indicator will not light when the main power is off). (An example of strapping the LCD TV set onto the
wall is shown on the right.)
· The string and hook are commercially available.
1
NOTE
· (Input), P ( )/( )(Channel), ()/(+) (Volume) and MENU on the control panel of the main unit have the same functions as
Stand
the same buttons on the remote control. Fundamentally, this operation manual provides a description based on operation using the
remote control.
LC-20SH1E
Part Names of the Remote Control Preparation
Installing Batteries in the Remote Control
Before using the LCD TV set for the first time, install the two "AA" size batteries (supplied) in the remote control. When the
(Sound) BACKLIGHT batteries become depleted and the remote control fails to operate, replace the batteries with new "AA" size batteries.
LC-20SH1E
Switches to the sound mode. Selects the brightness and 1 Open the battery cover. 2 Insert two "AA" size batteries. 3 Close the battery cover.
OPC of the display.
1 2
(Power) ROTATE
Rotates the display in every
direction.
(+)/(-) (Volume)
(Mute)
Switches the sound on and off.
( )/( ) (Input)
Switches the input source · Detach the cover · Place batteries with their · Align the tab on the battery cover (1) and place
between EXT1, EXT2 P( )/( ) (Channel) while pressing the terminals corresponding it while pressing the tab (2) to close it.
and TV modes. (") part. to the (+) and ()
OK, Programme Table Upwards/Downwards indications in the battery
Selection, Zoom display compartment.
function (Teletext mode) Caution!
END
Returns to normal screen. Precautions regarding batteries
MENU Improper use of batteries can result in a leakage of chemicals and/or explosion. Be sure to follow the instructions below.
Displays the menu. · Place batteries with their terminals corresponding to the (+) and () indications.
Right/Left Selection Returns to the previous screen. · Different types of batteries have different characteristics. Do not mix batteries of different types.
· Do not mix old and new batteries. Mixing old and new batteries can shorten the life of new batteries and/or cause old
(Teletext) batteries to leak chemicals.
Displays the Teletext mode Channel Select · Remove batteries as soon as they are depleted. Chemicals that leak from batteries can cause a rash. If chemical
screen. leakage is found, wipe it off with a cloth.
· The batteries supplied with the LCD TV set may have a shorter operating time due to storage conditions.
(Reveal)
Displays hidden information · If the remote control is not to be used for an extended period of time, remove the batteries from the remote control.
such as solutions to riddles (Flashback)
and puzzles
. Returns to the previous channel. Using the Remote Control
(Hold)
Temporarily holds the Use the remote control by pointing it towards the remote sensor
current Teletext page. Blue, Status Display window of the main unit. Objects between the remote control and
Turns on the status display sensor window may prevent proper operation.
when the menu is not displayed. OPC indicator
(Subtitle)
Remote sensor
6
Displays the Teletext
Subtitle directly. Yellow OPC sensor
Green, Sound Menu
Cautions regarding use of the remote control STANDBY/ON
(Subpage) · Do not apply shock to the remote control. In addition, do not indicator
Displays the Teletext expose the remote control to liquids, and do not place it in an area
Subpage directly. with high humidity.
· Do not install or place the remote control under direct sunlight. The
Red, Picture Menu heat may cause deformation of the unit.
· The remote control may not work properly if the remote sensor
window is under direct sunlight or strong lighting. In such a case,
change the angle of the lighting or main unit, or operate the remote
control closer to the remote sensor window.
LC-20SH1E
DIMENSIONS
161 Unit: mm
418 12°
215
175
246
30°
403.3
427
300.8
375
346
242
10
342 480
121
85 100
47
100
205
178
7
LC-20SH1E
REMOVING OF MAJOR PARTS
1. Remove the stand fixing screws (4 pcs.).
2. Remove the cabinet B fixing screws (7 pcs.).
3. Remove the cabinet B after opening from the direction of an arrow.
4. Detach the connector from each PWB.
2 Cabinet A
1
2
3
Cabinet B
Stand
4 Operation PWB
CN2 CN3 SC4201
Main PWB
4
SC105
P6704
SC1201 SC1202 P3601 SC6701
SC1203
4 SC102 P7701
P6703
4 4
4 SC104 SC106
CN1 P6702
P3902
P3901
4 Sub PWB P6701
P3301 SC3601 4
P6700
SC4001
R/C,LED PWB Inverter PWB
8
LC-20SH1E
5. Remove the 2 lock screws from the main PWB and undo the hooks a. Detach the chassis frame, together with its
terminals, from the main PWB.
6. Remove the 2 lock screws from the sub PWB and undo the hooks b, c and d. Detach the chassis frame together
with its terminals, from the sub PWB.
7. Remove the 3 lock screws from the inverter PWB and take out the inverter PWB.
8. Remove the 2 lock screws from the R/C, LED PWB and take out the R/C, LED PWB.
9. Remove the 2 lock screws from the operation panel (top cover), and detach the operation panel (top cover).
10. Remove the 3 lock screws from the operation PWB, and detach the operation PWB.
11. Remove the 4 lock screws each from the right and left speakers and take out both the speakers.
6
5
Main PWB
d Sub PWB
Chassis Frame
a 9 7
Operation panel
(Top Cover)
Operation
PWB
b c
10
Inverter PWB
Speaker (R) Speaker (L)
11 R/C,LED PWB 11
8
9
LC-20SH1E
» Precautions in handling the LCD panels
1. Work in a clean room (with humidities below 50%).
2. Be sure to wear an anti-static armband.
3. Handle the panels on an electro-conductive mat.
4. Be careful not to fall, shake and shock the panels.
12. Remove the 3 lock screws from the LCD panel and detach the LCD panel.
13. Remove the reflection/deflection sheet, diffusion sheet and diffusion plate.
14. Detach the lamp holders -R (top), -L (top) and -R (bottom), -L (bottom) from the lamp unit.
15. Detach the reflection sheet from the back shield.
Back shield
(PSLDMA495WJFW)
Lamp Holder -L (Bottom)
(LHLDZA412WJKZ)
Lamp Holder -L (Top)
(LHLDZA414WJKZ)
15
14
12
Reflection Sheet
(PSHEPA226WJZZ)
Lamp Holder -R (Bottom)
(LHLDZA413WJKZ)
Lamp Unit, x5
(KLMP-A046WJZZ)
Lamp Holder -R (Top)
(LHLDZA415WJKZ)
Diffusion Plate
20" LCD Panel Unit (PCOVUA048WJZZ)
13 Diffusion Sheet
(PSHEPA233WJZZ)
Reflection/deflection Sheet
(PSHEPA231WJZZ)
10
LC-20SH1E
» Precautions at the time of the side B(back) service of main, sub and Inverter unit.
1. Remove only SC1203 of the FFC for connection between Main unit (SC1203) and LCD panel, and connect the
extended cable (QCNW-A553WJZZ) for service.
2. Remove only SC1202 of the FFC for connection between Main unit (SC1202) and LCD panel, and connect the
extended cable (QCNW-B556WJZZ) for service.
3. Remove only SC1201 of the FFC for connection between Main unit (SC1201) and LCD panel, and connect the
extended cable (QCNW-A555WJZZ) for service.
4. Remove only SC105 of the FFC for connection between Main unit (SC105) and Operation unit (SC4201), and
connect the extended cable (QCNW-D444WJQZ) for service.
5. Remove only SC3601 of the FFC for connection between Sub unit (SC3601) and R/C, LED unit (SC4001), and
connect the extended cable (QCNW-D445WJQZ) for service.
6. Remove the PWB unit fixing screws (main unit : 2pcs, sub unit : 2pcs., inverter unit : 3pcs.)
Operation PWB Inverter PWB
3 4
2 Inverter
PWB
(Side B) Main PWB
1
(Side B)
Main PWB Sub PWB
(Side B)
5 6
R/C, LED PWB Sub PWB
Step Part No. Description
1 QCNW-A553WJZZ Extension Cable 30-pin Main (SC1203)-LCD Panel
2 QCNW-A556WJZZ Extension Cable 50-pin Main (SC1202)-LCD panel
3 QCNW-A555WJZZ Extension Cable 20-pin Main (SC1201)-LCD panel
4 QCNW-D444WJQZ Extension Cable 5-pin Operation (SC4201)-Main (SC105)
5 QCNW-D445WJQZ Extension Cable 8-pin R/C, LED (SC4001)-Sub (SC3601)
11
LC-20SH1E
ADJUSTING PROCEDURE OF EACH SECTION
The best adjustment is made before shipping. If any position deviation is found or after part replacement is
performed, adjust as follows.
Preparation for adjustments
Use a stable AC power source.
LC-20SH1E AC Power : 230V
1. Adjusting procedure
Complete Set Power ON Enter Adjustment Process Mode (By Remote Control) RF AGC adjustment
DCXO adjustment Common Bias adjustment White Balance adjustment
2. Entering the adjustment process mode
· After power on, press the adjustment process mode key on the service remote control.
· Switching on the TV set, holding pushed the "Input" and "Volume ()" Key at once, the TV set enters in the "K"
mode.
In this condition, pushing "Volume ()" and "P (Ù)" Key, the adjust mode appears.
3. Key operation in the adjustment process mode
· Use the "UP" or "DOWN" cursor key to select the adjustment mode item.
· Use the "LEFT" or "RIGHT" cursor key to change the data.
4. Initialization
When the EEPROM (IC101) has been replaced or when the EEPROM has been initialized, readjust the each
adjust the each adjustments.
4-1. When the EEPROM has been replaced:
1) Plug in the AC cord to an AC power outlet and turn on the power.
2) When the setting is finished, the LED turns from red to green. In about 15 seconds, the initialization is
completed.
4-2. When initializing the EEPROM data and making readjustments:
1) Enter the Adjustment Process mode.
2) Select the INIT TV item and press the "RIGHT" cursor key to enable the item.
3) Unplug the power cable and plug it again in the AC power outlet. Turn on the power.
4) When the setting is finished, the LED turns from red to green. In about 5 seconds, the initialization is
completed.
When the INIT TV item has been enabled in the adjustment process, be sure to unplug the power cable and plug
it in again. Then start adjustments. Otherwise the readjusted data cannot be put in memory.
4-3. Setting the screen size (inches)
1) Enter the Adjustment Process mode.
2) Check the model number.
3) Hold down the "LEFT" or "RIGHT" cursor key longer than 2 seconds, and select a screen size (LC-20SH1E).
SH1E Main Ver *.**
Scaler Ver *.**.**
INCH SIZE 20
12
LC-20SH1E
5. Adjustment
5-1. RF AGC adjustment
1) Feed the colour bar signal.
2) In Adjustment Mode, select the RF AGC AUTO ("OFF") and press the " RIGHT" cursor key to start the
adjustment.
3) Automatic adjustment is complete when it display "OK" is displayed.
4) RF AGC data will be in the range of 0-63. If "NOK" is displayed, adjustment failed.
SH1E Main Ver *.**
Scaler Ver *.**.**
RF AGC AUTO OK RF AGC Auto adjustment complete
38 RF AGC data (Example)
5-2. DCXO adjustment
1) Feed the colour bar signal.
2) In Adjustment Mode, select the DCXO AUTO ("OFF") and press " RIGHT" cursor key to start the adjustment.
3) Automatic adjustment is complete when "OK" is displayed. If "NOK" is displayed, adjustment failed.
SH1E Main Ver *.**
Scaler Ver *.**.**
DCXO AUTO OK DCXO Auto adjustment complete
** DCXO data
5-3. Common bias adjustment
1) Select the EXT-Video input and without signal.
2) In Adjustment Mode, select the COM BIAS and vary the data until the contrast becomes the sharpest.
(Black looks most sinking.)
5-4. White balance adjustment
[A] White balance pre-adjustment
1) Feed the 100% white signal.
2) In Adjustment Mode, select the AWBSD ("OFF") and press the " RIGHT" cursor key to start the adjustment.
3) Automatic adjustment is complete when "OK" is displayed.
[B] White balance adjustment
Adjust "R CUTOFF2", "G CUTOFF2", "B CUTOFF2", "WB R GAIN", "WB G GAIN" and "WB B GAIN" in the
adjustment processing to obtain the same colour as the standard set.
6. Factory setting
6-1. Make the factory setting using the adjustment remote control.
Model Key Name Remote Control Code OSD Language Setting
A3IK20SH1E Shipment Setting 1 1000 0011 1111 110 German (00001 FEh)
A3IK20SH1K Shipment Setting 2 1000 0000 1010 110 English (00002 A8h)
A3IK20SH1R Shipment Setting 3 1000 0110 1011 110 Russian (00003 EBh)
A3IK20SH1F Shipment Setting 4 1000 0100 1011 110 French (00004 E9h)
A3IK20SH1I Shipment Setting 6 1000 0000 1011 110 Italian (00005 E8h)
6-2. Different factory settings.
Model Language Country Color System Sound System
A3IK20SH1E German Germany PAL B/G
A3IK20SH1K English UK PAL I
A3IK20SH1R Russian Russia SECAM D/K
A3IK20SH1F French France SECAM L/L'
A3IK20SH1I Italian Italy PAL B/G
13
LC-20SH1E
7. Lamp error detection
7-1. Functional description
This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety
when the lamp or lamp circuit is abnormal.
If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed,
the followings occur.
1 The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front
side of TV turns from green to red.)
2 If the situation 1 happens 5 times sequentially, television can not be turned ON. (The power LED remains
red.)
7-2. Countermeasures
7-2-1. Check when turning OFF the lamp error detection
If the power has been turned off 5 times because of lamp error, hold down the unit's "INPUT" and "Volume
()" kye simultaneously and turn on the unit's power switch. The TV set gets back on power in the "K"
mode.
In this state, press the unit's "Volume ()" and "P (Ù)" key simultaneously. The Adjustment Process mode
shows up.
This enables the operation check to detect errors in the lamp or lamp circuit.
Check whether "ERROR NO RESET" of the adjustment process is 1 or more. If it is 1 or more, it indicates
the lamp error detection was executed.
7-2-2. Resetting of the lamp error count
After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO
RESET" of the adjustment process and set the number to 0 using the "LEFT" or "RIGHT" cursor key.
SH1E Main Ver *.**
Scaler Ver *.**.**
ERROR NO RESET 5
Reset 0
Afterwards, perform the operation check to confirm that the lamp error detection does not function.
14
LC-20SH1E
8. Hotel mode
8-1. How to enter the Hotel mode.
1) Turn on the power and enter the Adjustment Process mode.
2) Using the "UP" or "DOWN" cursor key on the remote controller, select the Hotel mode.
3) Using the "RIGHT" cursor key on the remote controller, change the setting from "0" to "1". Now the
Hotel mode shows up.
Adjustment Process menu
Hotel mode = "0" Hotel mode = "1"
Hotel mode 0 Hotel mode 1
EXT CONTROL OFF Max. volume **
On program ***
EXT CONTROL OFF
4) Using the "UP" or "DOWN" cursor key on the remote controller, select "Max. volume" and "On program".
Make the setting with the "LEFT" or "RIGHT" cursor key.
5) Finally quit the Adjustment Process mode and turn off the power. The TV set comes on in the Hotel mode
after the next switch-on.
8-2. Hotel mode settings
1) Max. volume (0-60)
You can set the maximum volume at your desired level.
2) On program (0-199)
You can select a desired channel when switching on the TV set.
8-3. Canceling the Hotel mode
1) Turn on the power and enter the Adjustment Process mode.
2) Using the "UP" or "DOWN" cursor key, select the Hotel mode.
3) Using the "LEFT" cursor key, change the setting from "1" to "0".
4) Finally quit the Adjustment Process mode and turn off the power. The TV set comes on out of the Hotel
mode after the next switch-on.
15
LC-20SH1E
9. Software Loading
1) Upgrading the software or after replacement of IC151, IC501 or Main PWB, make sure to upload the processors
with updated software.
2) Please use the dedicated Interface JIG (JIGINF-001) and supplied programs for upgrading the software.
3) This model employs two software;
· SCALER microprocessor software
· MAIN microprocessor software
Please upload the SCALER microprocessor software first follow by MAIN microprocessor software.
1. SCALER microprocessor
1) Set Interface JIG switch to position "SCALER".
2) Power ON the set and plug Interface JIG connector to P2002.
3) Run the ISP_Tool.exe program.
16
LC-20SH1E
4) First click [SST / ATMEL] and then follow by [Identify] to identify the flash memory.
Confirm the item below in Comment Window.
5) Click [Select Intel HEX File ...] to open the source files. The source file name are "Sedna_Sharp****.hex"
Confirm the source file is loaded correctly.
6) Next click the [Erase] to erase all the data in the flash memory. Confirm the erase process is complete
without any error.
7) Then click [Program] to start uploading the source file into the flash memory. After uploading process is
complete, confirm there are no error.
8) Click [Verify] to verify the uploaded data and confirm there are no error.
17
LC-20SH1E
9) Finally click [Restart System] to initialize. Confirm "Reset done" in Comment Window.
10) Power OFF the set by unplugging AC Cord, remove the JIG from the plug and wait for 1 minute before
power ON again.
Notes: If any error occur during any process, power OFF the set and repeat the all the process again. If
these still fail, please erase Main Software and repeat the whole process again. To erase Main software,
please refer to MAIN microprocessor step No. 1) to 5) only.
2. MAIN microprocessor
1) Set JIG switch to position "LOC".
2) Power ON the set and plug Interface JIG connector to P2002.
3) Run the WISP.exe program.
18
LC-20SH1E
4) First click [Enter ISP Mode] then click [Send]. If the following window appear, click [Yes]
Confirm ISP status "Ready".
If "Entering ISP is not successful" occur, repeat step No. 4) again. If still fail, unplug the AC cord and
repeat from step No. 2) again.
5) Then click [Erase Flash], follow by [Send]. Confirm the Program, PK26 & Character are all "OK" and ISP
status is "Ready".
If "Failed" occur, unplug the AC cord and repeat the whole process again from beginning.
19
LC-20SH1E
6) Next click [Write Flash] and load the source file by clicking [Browse]. The source file name are
"LC20SH1_****.hex". Once the data is loaded successfully click [Send]. Confirm the Program, PK26 &
Character are all "OK" and ISP status is "Ready".
If "Failed" occur, unplug the AC cord and repeat the whole process again from beginning.
7) Finally click [Verify Flash] and [Send] to verify the flash memory. Confirm the Program, PK26 & Character
are all "OK" and ISP status is "Ready". If "Failed" occur, unplug the AC cord and repeat the whole process
again from beginning.
8) Power OFF the set and remove the JIG.
20
No picture and No sound Back light lamp failure to light up
No Remove F7701 and No Do fuse F6700- Is there any short Check Q6700-
Do fuse F7701 check the load side. No Yes Q6716 and their
Replace F7701. F6704 function? circuit in INV +B
function? Is there short- line? peripheral parts for
circuit? short circuiting.
Yes Yes
Yes
Are T7701 secondary Is there any short- Are the pins (40) Check the OFL1
Is Q7702 base Yes output at C7720, No No line, OFL2 line,
voltage at "L" circuit in T7701 and (138) of IC1201
C7721, C7722, C7723 primary side in the "H" state? IC1201 and their
state? and C7725 voltage peripheral parts.
periphery?
normal? Yes
Yes
No
Are the outputs of Check the OFL line,
Is T7701 primary Q3600 and Q3601 No Q3600, Q3601 and
Check all output Check IC7702,
voltage line for switching waveform at Yes IC7704 and their in the "L" state? their peripheral
short circuit. pin (1) of IC7701 peripheral parts. parts.
normal? Yes
No
Is the pins (4) and No Check Q6700-
Check IC7701 and (7) of T6700-T6704 Q6716 and their
its peripheral parts. normal? peripheral parts.
Yes
21
Replace the back
Is the pin (10) of No light lamp with new
T6700-T6704 one and check
normal? again.
Yes
Check the error
amp circuit D6702-
D6711, Q6706,
Q6713, Q6717 and
their peripheral
TROUBLE SHOOTING TABLE
parts.
LC-20SH1E
No Picture (1/3)
LC-20SH1E
No picture at all. No TV output No Video 2 No S-Video
output output
Is output Q801, Check IC501 and Is voltage at pins No Is video input at Check the V1_V Is input at pins Check the V1_SY
No Check the power No No and V1_SC line
Q802 and Q803 its peripheral (7) and (9) of pin (B21) of line and its (C18) and (D18)
normal? parts. tuner normal? line. IC501 normal? peripheral parts. of IC501 normal? and their
peripheral parts.
Yes Yes
Is input / output No Check IC1201 Is output at pin No Check tuner and
of IC1201 and its peripheral (11) of tuner its peripheral
normal? parts. normal? parts.
Yes Yes
Check LCD panel Is input / output No Check SF201 and
voltages and of SF201 its peripheral
waveform. normal? parts.