Panasonic TOUGHBOOK CF-45 Series Service Manual page 69

For 4. RS232C CONTROLLER REGISTER R/W TEST. (Fig.13)
Press (4) and keys.
® Display
1st serial port tesi (I/O address xxxH)
(Normal Message): Test done !! Hit any key when ready._
When an error message is displayed, refer to [5.2 Error. Message].
For 5. INTERNAL LOOPBACK TEST. (Fig.13)
Press (5) and keys.
e Display
1st serial port test (I/O address xxxH)
(Normal Message): Test done !! Hit any key when ready._
When an error message is displayed, refer to [5.2 Error Message].
For 6. EXTERNAL LOOPBACK TEST. (Fig.13)
Press (6) and keys.
@ Display
1st serial port test {I/O address xxxH)
Connect loopback plug. ~———— Connect the loopback plug
to the serial port.
Hit any key when ready, _
(Normal Message): Test done ! | Hit any key when ready._
When an error message is displayed, refer to [5.2 Error Message}.
Loopback Plug Wiring Information
CF-45