Panasonic TOUGHBOOK CF-45 Series Service Manual

Also see for CF-45 Series: Reference manual Operating instructions Reference manual

49|4.3.9 SERIAL COMMUNICATION DIAGNOSISMake sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing:a Ref. PageNo. Symptom. Meise ta aera Component} ShematicNo. Brose Result P i Diagrams1 Data cannot be sent or is the COM port properly YES | Goto No. 1-2 peaEEy eeereceived, 4-4 *% set? : NO | Improper setting —_ _—is the same transmission | YES | Goto No. 1-3 aS a=1-2 | protocol set for both ihe :sending and receiving units?_|. NO. |Improper setting == aeE Check theDoes the RS-232C on the | YES | interface with the ae —1-3 |Main PCB operate normally -_-| other computerundera loopback test? . z Ic19 Main 16NO |Main PCB C22 Main 172 | Unit will not communicate fs the connection cable a | yEg | Goto No..2-2 — a:with another computer 2-t.| dedicated cross-patched =when connected directly. cable? NO. |Connection cable aie =Is the same transmission | yES | Goto No. 2-3 — =2-2 | protocol set for both the =sending and receiving units?_| NO | Improper setting = —Check theDoes the RS-232C on the | YES | interface with the — a2-3 |Main PCB operate normally other computerunder a reverse test? Main 16Main 17.3 | Unit will not communicate woeIs the COM t iwith modem. 3-1} set? Bee Prone, Improper setting ——3.2 |'8 the trasmission protocol Go to No. 3-3 pared =correct? Improper setting — potenDoes the modem operate Line3-3 | normally under a localanalog loopback test? Go to No. 3-4Does the RS-232C on the |YES |Modem — =3-4 |main board operate normally 3 C19 Main 16under a loopback test? NO | Main PCB Ic22 Main 174 | Diagnostic Test reports Is the loop back device a Ic19 Main 16problem in serial port. 44 properly attached to the NES" ManPCe IC22 Main 17connector (for an external No | I Stiloop back)? Improper setting —_ a