Read Sharp LC-42SA1E (serv.man2) Service Manual online
LC-42SA1E/RU
3 – 17
[10] Lamp error detection
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, 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 remains 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.
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.
and select ON using the right cursor. For execute press “OK” in the R/C and the label “***OK***” appears on Screen.
[11] Public Mode (Hotel Mode)
1. How to Enter in the Public Mode (Hotel Mode).
Turn on the power and enter in the Adjustment Process mode (ADJ1 or Service Mode) as usual.
In the [INIT], Page 2/11 of Service, turns ON the Public Mode option.
Turn off TV by pressing Main Power switch.
While pressing “
+” and “P^” keys at the same time, press Main Power switch for more than 2 seconds.
After this sequence the TV will turn on showing the Public Mode setting screen as follows:
Is possible to select each item of function by pressing cursor
/
keys on the remote control or P (
)(
) keys on the LCD TV.
The setting position of each item of functions is made by pressing cursor
/
keys on the remote control or VOL(+)(-) keys on the LCD TV.
Select EXECUTE position after you set all function, and press cursor
/
keys on the remote control or VOL(+)/(-) keys on the LCD TV for con-
firmation.
2. Public Mode Settings.
1. POWER ON FIXED [VARIABLE
FIXED]
When it is set to “FIXED” the TV is impossible to be switch off by Main Switch or Remote Control.
2. MAXIMUM VOLUME [0
60]
Is possible to set the maximum volume at limited level.
3. VOLUME FIXED [VARIABLE
FIXED]
Is possible to fix the sound volume at limited level.
When “FIXED” is selected the sound volume before limited is fixed.
4. VOLUME FIXED LEVEL [0
60]
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