Sharp LC-20S5E Service Manual ▷ View online
B2-2
DISASSEMBLY INSTRUCTIONS
Supply soldering
from upper position
to lower position
from upper position
to lower position
IC
Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 2-6.)
sliding to the lower position of the IC leads.
(Refer to Fig. 2-6.)
2.
Fig. 2-6
Soldering Iron
Solder
IC
Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 2-7.)
Shield Wire. (Refer to Fig. 2-7.)
3.
Fig. 2-7
Soldering Iron
Braided Shield Wire
NOTE
Do not absorb the solder to excess.
IC
When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 2-8.)
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 2-8.)
4.
Fig. 2-8
Thin-tip Soldering Iron
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, always be sure to replace the IC in this
case.
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, always be sure to replace the IC in this
case.
Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
5.
Solder temporarily
Soldering Iron
INSTALLATION
Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
1.
Fig. 2-5
Solder temporarily
C-1
SERVICE MODE LIST
This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit and on the remote
control for more than the standard time in the appropriate condition. (See below chart.)
control for more than the standard time in the appropriate condition. (See below chart.)
Initialization of factory TV data.
NOTE: If you set factory initialization, the memories are reset
NOTE: If you set factory initialization, the memories are reset
such as the channel setting, and the POWER ON total
hours.
hours.
POWER ON total hourson the screen.
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
Set Key
Operations
Remocon
Key
VOL. DOWN
(Minimum)
1
2 sec.
Standard
Time
VOL. DOWN
(Minimum)
6
2 sec.
VOL. DOWN
(Minimum)
9
2 sec.
Set
Condition
POWER ON
Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display
Adjustment).
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display
Adjustment).
Check of the SUM DATA, MICON VERSION on the screen.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
VOL. DOWN
(Minimum)
2 sec.
2
POWER ON
POWER ON
POWER ON
C-2
CONFIRMATION OF CHECK SUM, MICON VERSION AND POWER ON TOTAL HOURS.
Initial total of MEMORY IC and REGISTER DATA, MICON VERSION and POWER ON total hours can be checked on the
screen. Total hours are displayed in 16 system of notation.
screen. Total hours are displayed in 16 system of notation.
NOTE:
Initial setting data check sum.
MICON Version
WHEN REPLACING EEPROM (MEMORY) IC
If you set a factory initialization, the total hours is reset to "0".
Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.
Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.
1.
2.
3.
4.
2.
3.
4.
Turn on the POWER.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (2) on the remote control for more than 2 seconds.
After the confirmation of CHECK SUM, MICON VERSION and POWER ON TOTAL HOURS, turn off the power.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (2) on the remote control for more than 2 seconds.
After the confirmation of CHECK SUM, MICON VERSION and POWER ON TOTAL HOURS, turn off the power.
INIT : 28B9
VCT-P : 7C74
LCD ON : 0000
DB010_70129A
FIG. 1
POWER ON total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
Register data check sum.
4.
5.
6.
7.
8.
9.
6.
7.
8.
9.
10.
11.
12.
The unit will now have the correct DATA for the new MEMORY IC.
11.
12.
The unit will now have the correct DATA for the new MEMORY IC.
ADDRESS is now selected and should "blink". Using the UP/DOWN buton on the remote, step through the ADDRESS
until required ADDRESS to be changed is reached.
Press RIGHT/LEFT button to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using UP/DOWN button until required DATA value has been selected.
Pressing RIGHT/LEFT button will take you back to ADDRESS for further selection if necessary.
Repeat steps 4 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
until required ADDRESS to be changed is reached.
Press RIGHT/LEFT button to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using UP/DOWN button until required DATA value has been selected.
Pressing RIGHT/LEFT button will take you back to ADDRESS for further selection if necessary.
Repeat steps 4 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
Turn POWER on.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.
Turn POWER on.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.
ADDRESS
DATA
FIG. 2
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to INITIAL SETTING TABLE (Attached "INITIAL DATA").
ensure correct data settings while making reference to INITIAL SETTING TABLE (Attached "INITIAL DATA").
1.
2.
3.
2.
3.
Turn on the POWER, and set to the TV mode.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
ADDRESS and DATA should appear as FIG 2.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
ADDRESS and DATA should appear as FIG 2.
CONFIRMATION OF INITIAL DATA
INIT 0000 00
LDC ON 0000
DB010_70129A
LDC ON 0000
DB010_70129A
NOTE: The each item value might be different according to each set.
C-3
SERVICING FIXTURES AND TOOLS
Ref. No.
JG203
Part No.
APJG203000
Parts Name
MICON PROGRAM
JIG KIT 25-4
JIG KIT 25-4
Remarks
There are EEPROM DATA and FIRMWARE in Disc.
EU LCD MICON VER
UP ROM DISC
UP ROM DISC
APJG176118
JG176
Connect the set to personal computer.
JG176 EU LCD MICON VER UP ROM DISC
JG204 MICON UPDATE TOOL DISC
JG204 MICON UPDATE TOOL DISC
JG203 MICON PROGRAM JIG KIT 25-4
INSTALL FOR WRITING TOOLS
1.
2.
Set the MICON UPDATE TOOL DISC (JG204) to PC.
Install the LPT driver.
Re-boot the PC.
Install the “Setup_Visual_I2C_v3-2-3b8h.exe”.
Install the “Setup_VI2C_for_VCT6wxyP_v0202.exe”.
3.
4.
5.
It is necessary to install according to the PC.
Windows 95/98 : Setup_LptDrv_v0104_9x.exe
Windows 2000/XP : Setup_LptDrvDev_v020201_XP_2000.exe
Windows NT : Setup_LptDrv_v0104_NT.exe
Windows 95/98 : Setup_LptDrv_v0104_9x.exe
Windows 2000/XP : Setup_LptDrvDev_v020201_XP_2000.exe
Windows NT : Setup_LptDrv_v0104_NT.exe
NOTE :
JG204
APJG204000
MICON UPDATE TOOL
DISC
DISC
There is WRITING TOOLS in Disc.
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