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HOST COMPUTER COMMUNICATION PROBLEMS
The error and warning messages described in 'Projector
communication problems' also apply for the host com-
puter. In addition, it has another error message :
ERROR:
[4AH]
Host computer
doesn't understand
ENT:retry
/ EX:abort
TROUBLE SHOOTING
Below, the more or less frequently occurring problems and their solutions are listed :
Nothing displayed on Control Unit display
Interface powered, but LED not lit
Error message 'Proj. doesn't listen'
Message '0 proj found' in learn config
Measured reference values too low/high
Error message 'Host comp doesn't listen'
Error message 'Host comp doesn't answer'
2
Error message 'I
C bus malfunction'
Out of range errors
Defocusing :
the defocused level cannot be obtained by defocusing,
because it is already too high.
'ADDR: to locate proj whose RCU is hit' doesn't work
5975636
ACTAS 2
170297
means that the host com-
puter answers without pro-
tocol errors, but with infor-
mation not corresponding
to the request from the
ACTAS.
Problems
WARNING:
[08H]
Host computer
doesn't listen
ERROR:
[08H]
Host computer
doesn't listen
ENT:retry
/ EX:abort
Causes and Solutions
K
Control Unit not connected to Interface.
K
Interface not powered (check LED).
K
Fuse(s) blown in Interface Unit.
CAUTION : disconnect from line voltage
before opening the unit !
K
No learn config executed yet.
K
Address changed since learn config.
K
Bad RS232 connection.
K
Wrong baud rate in projector (should be 9600).
K
Projector off or in stand by.
K
Bad RS232 connection.
K
Wrong baud rate in projector (should be 9600).
K
Projector off or in stand by.
K
Measuring frequency too high/low.
K
Sensor not positioned correctly on projector.
K
Wrong address recognition in host computer
(should be 252).
K
Wrong baud rate in host computer (should be
9600).
K
Bad RS232 connection.
K
'Host comp' unintentionally selected under
'Adj pict' in 'Edit setup'.
K
Bad RS232 connection.
K
Bad Sensor connection.
Before suspecting the projector circuitry :
K
Check address.
K
Check if all signals arrive correctly.
K
The Sensor is installed correctly.
In case of 'Custom' or 'G2' references :
K
Check if reference values are realistic.
K
The measuring frequency changed since references
were taken.
K
Electronic circuitry is already over compensating for
blue phosphor saturation; just leave the blue tube
to an acceptable defocusing level.
K
Projector RWI software version is too old, use V4.08/
5.08/1.17 or more recent versions.
Errors & warning messages
ERROR:
Host computer
doesn't answer
ENT:retry
/ EX:abort
ERROR:
Host computer
gives bad checksum
ENT:retry
/ EX:abort
[7AH]
[7AH]
5-3
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