Sharp LC-37GD9EK (serv.man8) Service Manual ▷ View online
18
LC-26GA5E
LC-32GA5E
LC-32GD9E
LC-37GD9E
18
LC-26GA5E
LC-32GA5E
LC-32GA8/LC-32BV8
LC-37GA8/LC-37BV8
5.5. PAL Signal & Tuner Adjustment
5.4. RF AGC Adjustment (SMPTE RF SIGNAL- Alternative Method)
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: 50 ±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.
↑ 100% white
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.
↑ 100% white
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↑ 100% white
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.
↑ 100% white
↑ 100% white
[EXT 3]
[TUNER]
[EXT 3]
[TUNER]
[TUNER]
19
LC-26GA5E
LC-32GA5E
LC-32GD9E
LC-37GD9E
19
LC-26GA5E
LC-32GA5E
LC-32GA8/LC-32BV8
LC-37GA8/LC-37BV8
5.7. ADC Adjustment (Component 15K)
Adjustment Point
Adjustment conditions
Adjustment procedure
1
Setting
[Signal] (576i/50)
COMP 15K, 50Hz
100% Full Field Color Bar
[Terminal]
EXT4 [COMPONENT]
• Feed the COMPONENT 15K 100% full field color bar signal (100%
color saturation) to EXT4 COMPONENT IN.
2
Auto adjustment
performance
Adjustment process page 4.
Bring the cursor on [▪COMP15K ADJ] and press [OK].
[▪COMP15 ADJ OK] appears when finished.
↑ 100% white
[EXT 4]
6. White Balance Adjustment
Adjustment procedure Page 7/11 shows the value of adjustment gradation (IN value) and Adjustment procedure Page
8/11 & 9/11 show adj. offset value (initial value : 0). White balance adjustment is executed adjusting the adj. offset value,
indicated on Page 8/11 & 9/11.
Condition of the inspection: • Backlight: MAX (+8) [DYNAMIC]
• Colorimeter at screen centre
Adjustment reference device: Minolta CA-210
Tolerance adjustment spec. ±0.004, Inspection spec. : ±0.006 (GAMMA 1)
Tolerance adjustment spec. ±0.002, Inspection spec. : ±0.004 (GAMMA 2...6)
Adjustment: Check that the values on page 7/11 of process adjustment are set as below. If not, change them ac-
cordingly.
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
1- Display the current adjustment status at point 6. (Page 9/11 of process adjustment)
The pattern for checking the adjustment status is toggled by pressing the “6” button on the remote control. (Normal
OSD display -> “6” -> pattern 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 only with R and B, then G should be reduced. In this case, 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 step “5”.
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)
← Black
20
LC-26GA5E
LC-32GA5E
LC-32GD9E
LC-37GD9E
20
LC-26GA5E
LC-32GA5E
LC-32GA8/LC-32BV8
LC-37GA8/LC-37BV8
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[FACTORY INIT]
8. Initialization to factory settings
7. QS Temperature NVM Data Confirmation
During servicing of the LCD TV set , by software upgrading or by any cleaning NVM, it’s mandatory select the “Inch
Setting” in Service Mode, Page 2, according to the size of the TV set.
02/11 [ INIT ]
INPUT 4
PAL
--:--
Factory Init
--
Inch Setting
--
Public Mode
OFF
Center Acutime
00H
RESET
OFF
Backlight Acutime
00H
RESET
OFF
Picture Read Pos X
0
Picture Read Pos Y
0
Picture Read
OFF
Default picture after cleaning NVM. Picture with [Inch Setting] to 32.
02/11 [ INIT ]
INPUT 4
PAL
32:--
Factory Init
--
Inch Setting
32
Public Mode
OFF
Center Acutime
00H
RESET
OFF
Backlight Acutime
00H
RESET
OFF
Picture Read Pos X
0
Picture Read Pos Y
0
Picture Read
OFF
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 pattern is toggled.)
(Normal OSD display -> “5” -> Pattern 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 val-
ues of the luminance meter approach
x = 0.272 and y = 0.277.
6- Repeat step “5” for GAMMA points 4, 3, 2, and 1.
21
LC-26GA5E
LC-32GA5E
LC-32GD9E
LC-37GD9E
21
LC-26GA5E
LC-32GA5E
LC-32GA8/LC-32BV8
LC-37GA8/LC-37BV8
9. Lamp error detection
9.1. 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
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, television can not be turned ON. (The power LED remains red.)
9.2. 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 detection 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.
9.3. 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.