Panasonic CF-62 Service Manual page 26

F-62
Ui
Mi SERIAL COMMUNICATION DIAGNOSIS
Make sure that connecting cables, connectors and AC adapter are
not loose or disconnected prior to testing.
Is the same transmission protocol penne
-2
YES [Check the interface
with the other
computer
NO_{Main P.C.B
YES |Go to No. 2-2
NO {Connection cable
YES {Go to No. 2-3
NO |Improper setting
Does the RS-232C on the Main
P.C.B. operate normally under a
loopback test?
Unit will not communicate
with another computer
when connected directly.
Is the connection cable a
dedicated cross-patched cable?
Is the same transmission protocol
set for both the sending and
receiving units?
Does the RS-232C on the Main
Unit will not communicate
with modem.
line
ieee
es
Modem
Ne Main P.C.B are
YES |Main P.C.B. PY
NO {Improper setting
P.C.B. operate normally under a =
C.B.
3-1 |Is the COM port properly set? ol Facer
| NO [Improper setting | ——— |
3-2 Is the transmission protocol Go to No. 3-3 | ——— |
correct? Improper setting | —— |
3-3 }normally under a local analog ee
3 loopback test? ——
Does the RS-232C on the main
loopback test?
Is the loop back device properly
4-1 |attached to the connector (for an
reverse test?
Does the modem operate
3-4 |board operate normally under a
external loop back)?.
7-10
7-10
Diagnostic Test reports
problem in serial port.