![[RS-232C control flowchart]](/images/new-backgrounds/121747/1217477x1.webp)
[RS-232C control flowchart]
| START |
|
| Sending out command |
|
No NAK returned |
| No response for |
Awaiting response | 1 second or longer | |
| from projector |
|
| NAK returned |
|
Command is sent successfully. Command is executed successfully.
Checking execution of command (sending out check command)
OK
END
Command is sent successfully.
Command execution fails.
Check the following.
•Check that the function code is correct.
•Check that the data code is correct.
•Check that the projector is able to issue the return command.
NG | Note: In the following cases, NAK is |
| returned even when the projector is |
| in normal condition. |
•Immediately after the power is turned on (about 20 seconds to 2 minutes)
•During input switching
•During auto positioning
•During password lock
Command sending fails.
Check the following.
•Check that the command begins with “00”.
•The projector is not supplied with AC
power.
Check that AC power cord is connected.
Turn on the power. (Turn on the circuit breaker or main switch.)
•Not connected with the projector. 
Check that the
connected.
Check the
4
