Table of Contents
Advertisement
Clarity Visual Systems
Common Problems and Answers
Problem
I have a valid signal coming in,
but the SOURCE LED doesn't
light, and I have no picture.
I have a valid signal coming in,
the SOURCE LED lights up,
but the picture is all black.
I have a valid signal coming in,
the SOURCE LED lights up,
but the picture is all white.
The remote control doesn't
seem to work.
When I press On to light the
lamp, the lamp does not light,
and the STBY LED starts
flashing again.
When I press On, it takes the
lamp a long time to light.
The source is PC 800 x 600,
and I know the source is good,
but the picture is rolling.
June 1999
70
Answer
The wrong source is selected in the menu. In the main menu, choose
Source to open the Source Select menu. Use the up-down arrows to
highlight the top pair of arrows.
Use the right-left arrows to choose the Source corresponding to the
input connector you are using on the rear panel. Then use up-down to
highlight Auto and press Enter. If there is a good source on the
selected input, the unit will selected the correct mode for the input.
If you can see any menu, even if it is upside down or left-right reversed,
it means the Electronics Module is talking to the LCD correctly.
With the remote control, press Curtain. If there is an X in Curtain On,
press Enter. Curtain On prevents the source signal from getting to the
screen.
Is the Source black? If the source is black, as it might be if the source
is a computer and the computer is in a sleep mode, the image will be
black. If the source is video, are you in the tape leader or trailer that is
black?
Has the lamp failed? If the FAN and LAMP LEDs are on, the unit
believes that the lamp is on. Look at the rear panel, if possible. When
the lamp is lit, you should be able to see some light coming out of fan
exhaust opening.
Is the Black Test Pattern being used? In Misc Control, choose Test
Patterns, then choose Off.
Is the source all white?
Press Menu on the remote control. If you see a menu, then the
Electronics Module is talking to the LCD. If you can't bring up any
menu, call a service technician.
Is the White Test Pattern being used? In Misc Control, choose Test
Patterns, then choose Off.
Press ID on the remote control. If IR Disabled has an X, this monitor is
currently unable to respond to the IR signals coming from the remote
control. Press Enter to remove the X for IR Disabled.
Get closer with the remote control.
Aim at a different point on the screen, and change the angle.
Remove the screen and look at the Electronics Module. The IR sensor
is on top, near the 4-pin connector, facing up. Is it covered?
Are the AAA batteries in the remote control good?
This is probably an interlock problem. Normally, after the 3-minute
delay during which the STBY LED flashes, the STBY LED is on without
flashing, and the FAN and LAMP LEDs are off. If you press On at this
time, and the STBY LED starts flashing again, it is almost always
caused by an open interlock.
Check the screen. Is it pressed into place in all four corners? (Ultra-
Thin Mullion screens do not have an interlock for the screen.)
Is the rear panel in place and secure?
This is normal. After the 3-minute delay, there is an additional delay
time determined by the Unit ID knob setting. When you press ON, the
lamp waits 2 seconds times the Unit knob setting. If the knob is set to
9, the delay is 18 seconds. If the knob is on F, the delay is 2x15=30
seconds.
If the source is 800 x 600, and you manually switch to the 640 x 480
mode, sometimes when you manually switch back to 800 x 600, the
picture will roll sideways and vertically, as though it had lost sync. To fix
this, highlight Auto and press Enter. This will force the electronics to
look at the PC input to determine its format and set the registers
accordingly. For sources other than Composite and S-video, always
use Auto to select the Mode.
Advertisement
Table of Contents
