奇
菱
光電股份有限公司
Chi Lin Optronics Corp.
Doc. No
CS-72601
Version A3
Title
CHT-726 Level 1 Service Manual
Page
12 / 75
formatter board
The connect board deficient
The video module malfunctions
The formatter board fails.
from the power module to Video
module, power on projector, if the
color wheel spin normally, it means
the formatter board functions well, but
the video module malfunctions.
Otherwise, the formatter board fails,
please contact CLO for level 3
service.
The lamp doesn’t light up
after the projector powers
on, but the color wheel and
fans spin normally
Lamp failure
The 5-pin wire which connects
from ballast to the formatter board
doesn’t connect well
The black wire from Ballast to
lamp doesn’t connect well or is
failed
The white switch from the power
module to the lamp housing
doesn’t well connect.
The connect board malfunctions
or doesn’t connect the formatter
board and the video module well
The Ballast malfunctions
The rotation rate of the color
wheel isn’t correct.
Replace the lamp
Reconnect the wires or replace the
failed wires
Reconnect the connect board. If it is
failed, replace it.
Replace the ballast
The failure on photo sensor will cause
the spin rate of color wheel isn’t
correct, please contact CLO for the
level 3 service for repairing photo
sensor.
The keypad malfunction
Keypad is defective if one or two
buttons no function
The wire from the video module
to the keypad doesn’t well
connect.
The video module malfunctions if
all buttons no function
Replace the keypad if one or two
buttons no function
Reconnect the wire
Replace the video module if all
buttons no function.
Projector turns off
automatically in minutes
after power on.
The control board malfunctions
Replace the failed control board.
Screen flickering
The lamp failure
The Ballast failure
Replace failed lamp
Replace the ballast with a good one.
Screen jagged
The de-interlace malfunctions
Replace the video module
Incorrect image’s color
Incorrect color wheel index
Wrong firmware for the formatter
board
Feed in Red 256 gray bar pattern and
adjust the color wheel index
Reload firmware. Please contact CLO
for the detail.
“Power Off” message
keeps showing up
automatically.
The control board fails
Replace the control board
