Read Sharp LC-26P55E (serv.man7) Service Manual online
18
LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
SERVICE ADJUSTMENTS
Caution: Use due care in handling the information described here lest the users should
know how to enter the adjustment process mode. If the settings tampered with in
this mode, unrecoverable system damage may result.
The adjustment values are set to their optimum at the factory before shipping. If by any chance a value should become
improper or a readjustment is required due to part replacement, make an adjustment according to the following proce-
dure.
1 Entering and exiting the adjustment process mode
1- Unplug the AC power cord of TV set to force power off.
2- While holding down the “VOL (–)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the
set. The letter K appears on the screen. (Factory mode)
3- Next, hold down the “VOL (—)” and “P ( V )” keys on the set at once. Multiple lines of orange characters appearing
on the screen indicate that the set is now in the adjustment process mode. If you fail to enter the adjustment process
mode (the display is the same as normal start up), retry the procedure.
4- To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the
power. (When the power is turned off by the remote controller, unplug also the AC power cord and wait for 10
seconds before plug it in again.)
5- To remove “K” mode, just repeat steps 1 and 2. This time the letter K disappears from screen.
2 Remote Controller Key Operation and Description of Display in Adjustment Process Mode
2.1 Key operation
Remote controller key
Main unit key
Function
P (Λ / V)
P (Λ / V)
Moving an item (line) by one (UP/DOWN)
VOL (+/-)
VOL (+/-)
Changing a selected item setting (+1/-1)
Cursor (UP / DOWN)
————
Turning a page (PREVIOUS / NEXT)
Cursor (LEFT / RIGHT)
————
Changing a selected line setting (+10/-10)
INPUT SOURCE
on remote controller
INPUT button
Input source switching (toggle switching)
(TV → EXT1 → EXT2 → EXT3 → EXT4 → EXT5)
(Not Operative)
OK
————
Executing a function
Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal
available.
2.2 Description of display
Available from Main Version 1.195 or upper.
Parameters
Adjustment process menu
header
Destination
(EURO just as example. See Factory
Init, it may be EURO, UK, ITALY, FRANCE or RUSSIA)
Current color TV system
Currently selected input
Current page title
Current page/ Total pages
1/11 [INFO] TV AUTO 32: EURO
Main Version
Dev Version
Dev Loader Version
Pic Version
TEMP SENSOR
NORMAL STANDBY CAUSE
ERROR STANDBY CAUSE
LEW05 01.XXXX (YYYY/MM/DD X) X
_ _ _ _ _
_ _ _ _ _
XX.XX
XXX
XXXXX
[1] 0 XXHXXM
[2] 0 XXHXXM
[3] 0 XXHXXM
[4] 0 XXHXXM
[5] 0 XXHXXM
Inch Setting
(32 just as example, it may be: --/26/32/37)
19
LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
3. Adjustment process mode menu
The character string in brackets [ ] will appear as a page title in the adjustment process menu header.
Page Line Item
Description
Remarks (Adjustment detail, etc.)
[INFO]
1/11
1
2
3
4
5
6
7
Main Version
Dev Version
Dev Loader Version
PIC Version
TEMP SENSOR
NORMAL STANDBY CAUSE
ERROR STANDBY CAUSE
1.xxx (xx/xx/xxxx) x
- - - - -
- - - - -
xx.xx
xxx
[X]0
xxHxxM (X5)
Main microprocessor version (VCTP)
NOT USED
NOT USED
PIC version
Temp inside cabinet (near panel)
Last status which cause standby
Error standby cause
Total operating time before error
[INIT]
2/11
1
2
3
4
5
6
7
8
9
10
Factory Init
Inch Setting
Inch Setting
�
PUBLIC MODE
Center Acutime
RESET
Backlight Acutime
RESET
Picture Read Pos X
Picture Read Pos Y
Picture Read
(--/EURO/UK/ITALY/FRANCE/RUSSIA)ENTER
(--/26/32/37/45)
OFF/ON
XxH xxM
OFF/ON
XxH xxM
OFF/ON
0
0
ON/OFF
Initialization to factory settings
Initialization data for different panel sizes
PUBLIC MODE flag setting
Main operating hours
Main operating hours reset
Backlight operating hours
Backlight operating hours reset
x-axis setting of picture data
y-axis setting of picture data
Start/stop of picture data
[PAL. SECAM. N358]
3/11
1
2
3
4
5
6
7
8
9
RF-AGC ADJ
PAL+TUNER ADJ
PAL ADJ
TUNER ADJ
CONTRAST SD
SECAM CB OFFSET
SECAM CR OFFSET
TUNER A DAC
RF AGC
ENTER
ENTER
ENTER
ENTER
32
1
1
32
20
RF AGC auto adjustment
PALTUNER auto adjustment
PAL auto adjustment
TUNER auto adjustment
SD contrast adjustment
SECAM contrast adjustment
SECAM contrast adjustment
TUNER DAC adjustment
RF AGC adjustment
[COMP 15K]
4/11
1
2
COMP 15K ADJ
COMP 15K CONTRAST
ENTER
32
COMP 15K auto adjustment
Contrast adjustment
[HDTV]
5/11
1
HDTV CONTRAST
32
Contrast adjustment
[SMPTE]
�
6/11
1
2
3
4
5
6
7
8
9
RF-AGC ADJ
PAL+TUNER ADJ
PAL ADJ
TUNER ADJ
CONTRAST SD
SECAM CB OFFSET
SECAM CR OFFSET
TUNER A DAC
RF AGC
ENTER
ENTER
ENTER
ENTER
32
1
1
34
25
RF AGC auto adjustment
PALTUNER auto adjustment
PAL auto adjustment
TUNER auto adjustment
SD contrast adjustment
SECAM contrast adjustment
SECAM contrast adjustment
TUNER DAC adjustment
RF AGC adjustment
[M GAMMA INFO]
7/11
1
2
3
4
5
6
7
8
MGAMMA IN 1
MGAMMA IN 2
MGAMMA IN 3
MGAMMA IN 4
MGAMMA IN 5
MGAMMA IN 6
MGAMMA WRITE
MGAMMA RESET
160
320
480
640
800
960
OFF/ON
OFF/ON
W/B adjustment, gradation 1 input setting
W/B adjustment, gradation 2 input setting
W/B adjustment, gradation 3 input setting
W/B adjustment, gradation 4 input setting
W/B adjustment, gradation 5 input setting
W/B adjustment, gradation 6 input setting
EEP writing of adjustment values
Initialization of adjustment values
[M GAMMA 1-3]
8/11
1
2
3
4
5
6
7
8
9
10
MGAMMA R 1
MGAMMA G 1
MGAMMA B 1
MGAMMA R 2
MGAMMA G 2
MGAMMA B 2
MGAMMA R 3
MGAMMA G 3
MGAMMA B 3
MGAMMA WRITE
0
0
0
0
0
0
0
0
0
OFF/ON
W/B adjustment, gradation 1R adjustment value
W/B adjustment, gradation 1G adjustment value
W/B adjustment, gradation 1B adjustment value
W/B adjustment, gradation 2R adjustment value
W/B adjustment, gradation 2G adjustment value
W/B adjustment, gradation 2B adjustment value
W/B adjustment, gradation 3R adjustment value
W/B adjustment, gradation 3G adjustment value
W/B adjustment, gradation 3B adjustment value
EEP writing of adjustment values
[M GAMMA 4-6]
9/11
1
2
3
4
5
MGAMMA R 4
MGAMMA G 4
MGAMMA B 4
MGAMMA R 5
MGAMMA G 5
0
0
0
0
0
W/B adjustment, gradation 4R adjustment value
W/B adjustment, gradation 4G adjustment value
W/B adjustment, gradation 4B adjustment value
W/B adjustment, gradation 5R adjustment value
W/B adjustment, gradation 5G adjustment value
(NOT OPERATIVE)
Available from Main Version 1.195 or upper.
20
LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
4 Special Features
- ERROR STAND-BY CAUSE (Page 1/11)
When the unit enters standby due to operational error, total time before the error and the cause of error is recorded
on EEPROM, if possible. The values can be used to locate the fault for repair.
- EEP CLEAR (Page 10/11)
Restore NVM data to default values.
- EEP CLEAR B (Page 10/11)
Restore NVM data to default values except adjustment data.
5 Video Signal Adjustment Procedure
The adjustment process mode menu is listed in Section 3.
5.1. Signal check
Signal generator level adjustment check (Adjustment to the specified level).
- Composite signal PAL
: 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
- 15K Component signal
: Y level
0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
(50Hz) (576i/50Hz)
PB, PR level
0.7Vp-p ± 0.02Vp-p
5.2. Entering the adjustment process mode
Enter the adjustment process mode according to Section
1.
5.3. RF AGC Adjustment
Adjustment Point
Adjustment conditions
Adjustment procedure
1
Setting
[Signal]
PAL
Field Color Bar
RF signal
[Terminal]
TUNER
• Feed the PAL color bar signal (E-12ch) to TUNER.
Signal level: 52 ±1dB µV (75Ω LOAD)
2
Auto adjustment
performance
Adjustment process page 3.
Bring the cursor on [▪RF AGC ADJ] and press [OK].
[▪RF AGC ADJ OK] appears when finished.
SMPTE HALF FIELD COLOR BARS
EXT3-PAL Full field Color Bar 75 Color Saturation
E-12 Half Field Color bars
↑ 100% white
[TUNER]
Page Line Item
Description
Remarks (Adjustment detail, etc.)
[M GAMMA 4-6]
9/11
(Continued)
6
7
8
9
10
MGAMMA B 5
MGAMMA R 6
MGAMMA G 6
MGAMMA B 6
MGAMMA WRITE
0
0
0
0
OFF/ON
W/B adjustment, gradation 5B adjustment value
W/B adjustment, gradation 6R adjustment value
W/B adjustment, gradation 6G adjustment value
W/B adjustment, gradation 6B adjustment value
EEP writing of adjustment values
[ETC]
10/11
1
2
3
4
5
6
7
8
9
EEP CLEAR
EEP CLEAR B
STAND BY CAUSE RESET
AUTO INSTALLATION SW
OPTION
COUNTRY
L ERR RESET
L ERR STOP
I2C-OFF
OFF/ON
OFF/ON
OFF/ON
0/1
0
(--/EURO/UK/ITALY/FRANCE/RUSSIA)
0
0/1
ENTER
Restore NVM data to default values
Restore NVM data to default values except
adjustment data
Clearing of standby cause error list
0: unfinished 1:finish (The setting takes effect
the next time the power is turned on.)
Selected country
Lamp error counter
Stops Lamp Error feature (Not operative)
BUS STOP
LCD
11/11
1
2
3
4
5
6
7
OSC FREQ 50
OSC FREQ 60
PWM FREQ 50
PWM FREQ 60
PWM FREQ
PWM DUTY
PWM CTRL
62
62
0
0
409
227
0
21
LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
5.5. PAL Signal & Tuner Adjustment
5.4. RF AGC Adjustment (SMPTE RF SIGNAL- Alternative Method)
5.6. PAL Signal & Tuner Adjustment (SMPTE RF SIGNAL-Alternative Method)
Adjustment Point
Adjustment conditions
Adjustment procedure
1
Setting
[Signal]
PAL
FULL Field Color Bar
Composite or
RF SMPTE
signal
[Terminal]
EXT3 VIDEO IN
TUNER
• Feed the PAL full field color bar signal (75% color saturation) to
EXT3 VIDEO IN.
• Feed the RF signal SMPTE color bar (E-12) to TUNER.
• Make sure the SMPTE color bar pattern (E-12) has the sync level of
7:3 with the picture level.
2
Auto adjustment
performance
Adjustment process page 6.
Bring the cursor on [▪PAL +TUNER ADJ] and press [OK].
[▪PAL+ TUNER ADJ OK] appears when finished.
SMPTE HALF FIELD COLOR BARS
EXT3-PAL Full field Color Bar 75 Color Saturation
E-12 Half Field Color bars
↑ 100% white
SMPTE HALF FIELD COLOR BARS
EXT3-PAL Full field Color Bar 75 Color Saturation
E-12 Half Field Color bars
↑ 100% white
[EXT 3]
[TUNER]
Adjustment Point
Adjustment conditions
Adjustment procedure
1
Setting
[Signal]
PAL
FULL Field Color Bar
Composite or RF signal
[Terminal]
EXT3 VIDEO IN
TUNER
• Feed the PAL full field color bar signal (75% color saturation) to
EXT3 VIDEO IN.
• Feed the RF signal PAL color bar (E-12) to TUNER.
• Make sure the PAL color bar pattern (E-12) has the sync level of 7:3
with the picture level.
2
Auto adjustment
performance
Adjustment process page 3.
Bring the cursor on [▪PAL +TUNER ADJ] and press [OK].
[▪PAL+ TUNER ADJ OK] appears when finished.
SMPTE HALF FIELD COLOR BARS
EXT3-PAL Full field Color Bar 75 Color Saturation
E-12 Half Field Color bars
↑ 100% white
SMPTE HALF FIELD COLOR BARS
EXT3-PAL Full field Color Bar 75 Color Saturation
E-12 Half Field Color bars
↑ 100% white
[EXT 3]
[TUNER]
Adjustment Point
Adjustment conditions
Adjustment procedure
1
Setting
[Signal]
PAL
SMPTE Field Color Bar
RF signal
[Terminal]
TUNER
• Feed the PAL SMPTE color bar signal (E-12ch) to TUNER.
Signal level: 52 ±1dB µV (75Ω LOAD)
2
Auto adjustment
performance
Adjustment process page 6.
Bring the cursor on [▪RF AGC ADJ] and press [OK].
[▪RF AGC ADJ OK] appears when finished.
SMPTE HALF FIELD COLOR BARS
EXT3-PAL Full field Color Bar 75 Color Saturation
E-12 Half Field Color bars
↑ 100% white
[TUNER]
Available from Main Version 1.195 or upper.