Acer AC707 User Manual page 20

E-8
TROUBLESHOOTING
If your monitor fails to operate functionally, it may
be possible to correct the problem by making simple
checks as follows:
Problem
Blank screen
(*NOTE)
Display position
off-center
Display too small
or too large
Display too bright
or too dim
Refer to the operation instructions for your computer/
video adapter to ensure that you have the correct signal
output source for the monitor. Ensure that the switches
on the video adapter are set correctly for operation
with this monitor.
If the above steps fail to correct the problem contact
your dealer for servicing by qualified service
personnel.
Please remember that the monitor should be returned
for servicing together with the power cord.
* NOTE: You can easily distinguish if the problem
is on the monitor or on the computer by
using the monitor's built-in selftest
function.
With the monitor power ON, disconnect
the signal cable from monitor. If you see a
"NO SIGNAL" image on the screen, the
monitor is functioning properly, and the
problem is with the PC side or signal cable.
Check & Adjust
· Monitor power switch,
power cord, signal cable,
or connector
· PC power switch
· Brightness & contrast
controls
· Vertical centering &
horizontal phase controls
· Vertical & horizontal size
controls
· Brightness & contrast
controls
SERVICING
Refer all servicing to qualified service personnel.
Serious shock hazards exist within the covers
of this monitor.
D o n o t o p e n t h e c o v e r s u n d e r a n y
circumstances- there are no user serviceable
parts inside.
SIGNAL CONNECTOR
INFORMATION
1
Pin Function
1 Red signal
2 Green signal
3 Blue signal
4 Ground
5 *N O T E
6 Red return
Green
7
return
8 Blue return
*NOTE: This pin is used for self test detection; at
PC side, this pin has to be connected to
ground.
**NOTE: This pin is used for PC99, at PC side, this
pin will supply +5VDC.
5
15
Pin Function
9 ** N O T E
10 Digital ground
11 Ground
12 SDA (DDC2B)
Horizontal
13
Synchronization
Vertical synchronization
14
& V C LK
15 SCL (DDC 2B)