Sharp LC-32GA3E (serv.man7) Service Manual ▷ View online
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4. COM BIAS adjustment
Shift to the [COM BIAS] item with the cursor UP/DOWN key and select a numeric value with the cursor
RIGHT/LEFT key.
Changing the numeric value with the cursor UP/DOWN key will make appear the test pattern. Make an
adjustment so that the flicker near the center of the screen is minimized.
Adjusting procedure by use of [RS-232C]
»
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.
»
Start the unit with the RS-232C cable connected.
»
Start the terminal software. (The freeware readily available on the Internet will do.)
»
Make the following settings.
Baud rate
9600
Data
8 bits
Parity
None
Stop bit
1 bit
Flow control
Not implemented
»
If the settings are correct, the terminal software indicates "ERR" against pressing of the "ENTER" key.
»
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.
Command entry is successful if the terminal software indicates "OK" when the "ENTER" is pressed.
If "ERR" is shown, retry to enter the command.
RS232C command table
Command
Function
Remarks
MSET1001
MOFR****
MOFG****
MOFB****
MGAR****
MGAG****
MGAB****
MINF0000
MINF0001
MINF0002
Starting the white balance adjustment
Adjusting the R GAMMA L value
Adjusting the G GAMMA L value
Adjusting the B GAMMA L value
Adjusting the R GAMMA H value
Adjusting the G GAMMA H value
Adjusting the B GAMMA H value
Displaying the R GAMMA table
Displaying the G GAMMA table
Displaying the B GAMMA table
Ending the adjustment with a numeric value
other than 1001
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
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5. Lamp error detection
5-1. Feature description
This liquid-crystal colour TV incorporates a lamp error detection feature (lamp error detection) that auto-
matically turns OFF the power for safety under abnormal lamp or lamp circuit conditions.
If anything is wrong with the lamp or lamp circuit or when the lamp error detection feature is activated for
some reason, the following will result.
1
The power of TV main body is turned OFF about six seconds after it is turned ON. (The power LED on
the front of the TV turns red from green and keeps blinking in red (ON for 250ms and OFF for 1sec)).
2
If occurs five times consecutively, it becomes impossible to turn ON the power. (The power LED keeps
blinking in red (ON for 250ms and OFF for 1sec)).
5-2. Measures
1) Checking with lamp error detection OFF
Refer to "Entering and exiting the adjustment process mode" in the section 10-2 to enter the display
process mode.
If there is a problem with a lamp or a lamp circuit, the lamp will go out. (The power LED is green.)
Then, you can check the operation to see if the lamp and lamp circuit are abnormal.
2) Resetting the lamp error count
After you have finished checking whether the lamp and lamp circuit are abnormal, reset the lamp error
count. If a lamp error is detected five consecutive times, the power cannot be turned on.
Therefore, move to the [L ERR RESET] line, the 5th line on the first page of the "Display process mode",
using the Cursor UP/DOWN key. Then, reset the [L ERR RESET] value using the Cursor RIGHT/LEFT
key. In this case, press the Cursor UP/DOWN key to reset it to "0".
Table of contents of adjustment process mode Page 0
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
S
E
R
V
I
C
E
I
3
2
G
A
3
E
→
1
G
R
A
Y
L
E
V
E
L
1
0
0
2
C
O
M
B
I
A
S
1
9
0
Values specific to each display
3
V
L
S
B
I
A
S
0
4
1
4
L
E
R
R
R
E
S
E
T
0
Reset to "0 "
5
L
C
D
6
P
A
T
T
E
R
N
7
M
O
T
O
R
A
N
D
F
A
N
8
O
T
H
E
R
9
V
E
R
M
3
0
1
After resetting to "0", perform an operational check to ensure that the lamp error detection feature is not activated.
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6. List of adjustment process modes (Display)
(Examples)
3
3
2
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3
2
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