DOWNLOAD Sharp LC-26D44E (serv.man4) Service Manual ↓ Size: 5.53 MB | Pages: 26 in PDF or view online for FREE

Model
LC-26D44E (serv.man4)
Pages
26
Size
5.53 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Adjustment
File
lc-26d44e-sm4.pdf
Date

Sharp LC-26D44E (serv.man4) Service Manual ▷ View online

LC-26D44E/S/RU-BK/GY
3 – 21
[7] Video signal adjustment procedure
* The adjustment process mode menu is listed in Section 5.
1. Signal check
1. Signal generator level adjustment check (Adjustment to the specified level)
2. Entering the adjustment process mode 
1. Enter the adjustment process mode according to Section 3.
3. RF AGC adjustment
4. PAL signal & tuner adjustment
• Composite signal PAL
: 0.7Vp-p 
±0.02Vp-p (Pedestal to white level)
• 15K component signal (50 Hz)
: Y level               0.7Vp-p 
±0.02Vp-p (Pedestal to white level)
  PB, PR level     0.7Vp-p 
±0.02Vp-p
Adjustment point
Adjustment Conditions
Adjustment procedure
1
Setting
[Signal]
PAL
Sprit Field Colour Bar
RF signal UV
[Terminal]
TUNER
• Feed the PAL Sprit Field colour bar signal to TUNER.
Signal level: 55 dB 
µV +1dB, -1dB (75Ω LOAD)
2
Auto adjustment
performance
Adjustment process
Page3
Bring the cursor on [
RF AGC ADJ] and press [OK]
[***OK***] appears when finished.
Adjustment point
Adjustment Conditions
Adjustment procedure
1
Setting
[Signal]
PAL
Full Field Colour Bar
Composite or RF signal
[Terminal]
EXT1 SCART IN
TUNER
• Feed the PAL full field colour bar signal (75% colour saturation) to 
EXT1 SCART IN.
• Feed the RF signal (PAL colour bar) to TUNER.
• Make sure the PAL colour bar pattern has the sync level of 7:3 with 
the picture level.
2
Auto adjustment
performance
Adjustment process
Page3
Bring the cursor on [
PAL + TUNER ADJ] and press [OK]
[***OK***] appears when finished.
[E-12CH]
100% white
100% white
VIDEO IN SIGNAL]
100% white
[RF Signal]
LC-26D44E/S/RU-BK/GY
3 – 22
5. ADC adjustment (Component 15K)
[8] White Balance Adjustment
Adjustment gradation values (IN) appear on page 7/11 of process adjustment, and adjustment initial values (offset value) appear on pages 8/11 and
9/11. For white balance adjustment, adjust the offset values on pages 8/11 and 9/11.
[Condition of the unit for inspection] Modulated light: MAX (+8)
[Adjustment reference device] Minolta CA-210
[Adjustment]
Check that the values on page 7/11 of process adjustment are set as below. If not, change them accordingly.
1) Display the current adjustment status at point 6. (Page 8/11 of process adjustment)
The display for checking the adjustment status is toggled by pressing the “6” button on the remote control.
(Normal OSD display 
→ “6” → display for check (OSD disappears) → “6” →normal OSD display → • • •)
2) Read the value of the luminance meter.
3) Change M GAMMA R6/M GAMMA B6 (Adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.
(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R and B must be fixed.)
4) If G is changed in step 3), change the values of M GAMMA G1-M GAMMA G5 on pages 8/11 and 9/11 of process adjustment as follows. When not
changed, go to step5).
Offset value of M GAMMA G1 = (Offset value of M GAMMA G6) * (160/960)
Offset value of M GAMMA G2 = (Offset value of M GAMMA G6) * (320/960)
Offset value of M GAMMA G3 = (Offset value of M GAMMA G6) * (480/960)
Offset value of M GAMMA G4 = (Offset value of M GAMMA G6) * (640/960)
Offset value of M GAMMA G5 = (Offset value of M GAMMA G6) * (800/960)
5) Display the adjustment status of the current point 5. (Each time the “5” button on the remote control is pressed, the adjustment status check dis-
play is toggled.)
(Normal OSD display 
→ “5” → Check display (OSD disappears) → “5” → Normal OSD display → • • •)
Change M GAMMA R5/M GAMMA B5 (adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.
6) Repeat step 5) for points 4, 3, 2, and 1.
[Adjustment reference standard value]
Adjustment point
Adjustment Conditions
Adjustment procedure
1
Setting
[Signal]
COMP15K, 50Hz
100% Full Field Colour Bar
[Terminal]
EXT5 COMPONENT IN
• Feed the COMPONENT 15K 100% full field colour bar signal 
(100% colour saturation) to EXT5 COMPONENT IN.
2
Auto adjustment
performance
Adjustment process
Page4
Bring the cursor on [
COMP15K ADJ] and press [OK]
[***OK***] appears when finished.
M GAMMA IN 1
160
M GAMMA IN 2
320
M GAMMA IN 3
480
M GAMMA IN 4
640
M GAMMA IN 5
800
M GAMMA IN 6
960
Adjustment spec
±0.004
Inspection spec
±0.006 (point 1)
Adjustment spec
±0.002
Inspection spec
±0.004 (Excluding the above-mentioned)
100% white
Black
LC-26D44E/S/RU-BK/GY
3 – 23
[9] Adjusting procedure by use of [RS-232C]
1) Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system, as well as the RS-232C cross cable.
2) Start the unit with the RS-232C cable connected.
3) Start the terminal software. (The freeware readily available on the Internet will do.)
4) Make the following settings.
5) If the settings are correct, the terminal software indicates "ERR" against pressing of the "ENTER" key.
6) After the settings are done correctly, it is possible to make an adjustment by typing in the command shown in the table below and pressing the
"ENTER" key on the keyboard.
7) Command entry is successful if the terminal software indicates "OK" when the "ENTER" is pressed. If "ERR" is shown, retry to enter the command.
8) Send the process mode switching command to switch from the RS232C operation mode to the process mode.
KRSW0001: "ERR" is returned.
KKT10037: When "OK" is returned, the process mode becomes active. When "ERR", start over from KRSW0001.
9) Send each adjustment command.
RS-232C command list
Baud rate
9,600 bps
Data LENGTH
8 bit
Parity bit
None
Stop bit
1 bit
Flow control
None
Command
Function
Remarks
KYOF0000
Remote control disabled
OSDS0001
OSD display inhibited
SBSL0016
Light control level MAX
MSET0001
Background adjustment start
MSET0004
Initialization of adjustment value
LEV60928
Gradation 6 (928-gradation adjustment)
MG6G ****
Adjustment of G of gradation 6
0000 ~4095
MG6R ****
Adjustment of R of gradation 6
0000 ~ 4095
MG6B ****
Adjustment of B of gradation 6
0000 ~ 4095
LEV50800
Gradation 5 (800-gradation adjustment)
MG5G ****
Input of G of gradation 5
Calculated value
MG5R ****
Input of R of gradation 5
0000 ~4095
MG5B ****
Input of B of gradation 5
0000 ~ 4095
LEV40656
Gradation 4 (656-gradation adjustment)
MG4G ****
Input of G of 4
Calculated value
MG4R ****
Input of R of 4
0000 ~4095
MG4B ****
Input of B of 4
0000 ~ 4095
LEV30528
Gradation 3 (528-gradation adjustment)
MG3G ****
Input of G of 3
MG3R****
Input of R of 3
0000 ~ 4095
MG3B ****
Input of B of 3
0000 ~ 4095
LEV20352
Gradation 2 (352-gradation adjustment)
Calculated value
MG2G ****
Input of G of 2
0000 ~ 4095
MG2R ****
Input of R of 2
0000 ~ 4095
MG2B ****
Input of B of 2
0000 ~ 4095
LEV10184
Gradation 1(176-gradation adjustment)
MG1G ****
Input of G of 1
Calculated value
MG1R ****
Input of R of 1
0000 ~ 4095
MG1B ****
Input of B of 1
0000 ~ 4095
MSET0003
Writing of adjustment value
LC-26D44E/S/RU-BK/GY
3 – 24
[10] Initialization to factory settings
[11] Lamp error detection
1. Function 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 following 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, the power is turned on (relay is turned ON).
     However, the backlight is not turned on, and then the relay is turned OFF after 5 to 6 seconds. (The power LED turns from green to red.)
2. Countermeasures
When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment process with the power LED red. Entering the
adjustment process turns OFF the error detection and turns ON TV. This enables the operation check to detect errors in the lamp or lamp circuit
Check whether “L ERROR RESET” on point 7, page 10/11 of the adjustment process is 1 or more. If it is 1 or more, it indicates the lamp error detec-
tion was executed. After confirming that the lamp or lamp circuit is normal, reset the lamp error counter pushing “OK” in the R/C. After resetting
counter the label “***OK***” appears on Screen.
3. Reset standby cause error list
After confirming that the lamp error counter has been erased, select “STAND BY CAUSE RESET” on point 3, page 10/11 of the adjustment process
and select ON using the right cursor. For execute press “OK” in the R/C and the label “***OK***” appears on Screen.
Caution:
When the factory settings have been made, all user setting data, including the channel settings, are initialized.
(The adjustments done in the adjustment process mode are not initialized.) Keep this in mind when initializing these settings.
Adjustment item
Adjustment conditions
Adjustment procedure
1
Factory settings
Forcibly turn off the power
(See to below caution)
• Enter the adjustment process mode.
• Move the cursor to [Factory Init] on page 2/11.
• Use the R/C key to select a destination [EURO/RUSSIA/
SWEDEN]. And, press the [OK] key.
• “EXECUTING...” appears and initialization starts.
• After a while, “*** OK ***” appears and the setting is complete.
NOTE: Never turn the power off during initialization.
When performing factory settings (while displaying page 2 of adjustment 
process), confirm that the item “Inch Setting” or the panel size displayed 
in the upper right corner corresponds to each panel size.
The following settings will be back to their factory ones.
1. User settings
2. Channel data (e.g. broadcast frequencies)
3. Maker option setting
4. Password data
After adjustments, exit the adjustment process mode.
To exit the adjustment process mode, unplug the AC power cord from the outlet to forcibly turn off the power.
When the power is turned off with the remote control, unplug the AC power cord and plug it back in (wait approximately 10 seconds before plugging 
in the AC power cord)
Page of 26
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