Sharp AQUOS LC-22AD1E, Service Manual

Page: 26 / 111

26
LC-22AD1E
5. Lamp error detection
1) Function description
This LCD colour television has a function (lamp error detection) that turns off the power automatically, for
safety, if a problem occurs with a lamp or a lamp circuit.
If there is a problem with a lamp or a lamp circuit or if a lamp error is detected for some other cause, the
following will occur.
(1) The power is turned off about 15 seconds after the power to the TV is turned on. (The power LED on
the front of the TV will be changed from green to red, and it will flash three times repeatedly.)
(2) If the protective function described in (1) is repeatedly activated five consecutive times, you will not be
able to turn on the power. (The red power LED will flash three times, repeatedly.)
2) Countermeasures
1. Confirmation after the lamp error detection is deactivated
When the power is turned off due to the lamp error detection function as described above, turn off
the [power] while the power LED is red. Then, when the “TV/VIDEO” key and the “MENU” key are
held down and the “MAIN POWER“ key is pressed, the [inspection process] mode will be entered
and “K” will be displayed. Next, press the “ (-)” key and the “(
Ù
)” key at the same time to
enter the [adjustment mode].
Then, you can check the operation to see if the lamp and lamp circuit are abnormal.
See if [ERROR NO RESET] in the first page of the adjustment is set to 1 or more.
If it is 1 or more, it means that a lamp error has been detected.
2. Resetting the lamp error count
After you have finished checking whether the lamp and lamp circuit are abnormal, reset the lamp error
count.
Select [ERROR NO RESET] in the first page of the adjustment process, and reset it to [0] using the
cursor “(
Û
)/(
û
)” keys.
WLD 26 VER 1.000 DTV VER
INCH SIZE 22
MODEL AD1E
ERROR NO RESET 0
1BIT_AMP ERR 0
PUBLIC MODE OFF
COM BIAS 60 100
COM BIAS 50 100
PAL TAMP 20
SECAM TAMP 20
AV AMP 20
TAMP L 160
Y READ VALUE
TAMP H 168
Reset to "0"
Fig. 5-1
First page of the first layer of the adjustment process