Karel MS48 - PC & Printer Communication Failures

Karel MS48 Installation & Maintenance Guide
Edition 3.2
68
7) CM48 or PK48 cannot communicate with the PC:
a) Remove KY16 Mini Printer if it is already installed on the system,
b) Make sure that you are using the correct security plug,
c) Check the cable connections at both sides,
d) Check the pin connections of the PKCR card,
e) Check if the communication port of the PC is working properly,
f) Replace the cable,
g) Replace the PKCR card,
h) Reinstall the software,
i) Replace the MB48 motherboard.
8) RS232 cannot communicate with the printer:
a) Remove KY16 Mini Printer if it is already installed on the system.
b) Check the cable connections at both sides,
c) Check the pin connections of the RS232 card,
d) Check whether the communication parameters of the printer match to
these of the system,
e) Replace the cable,
f) Replace the RS232 card,
g) Replace the MB48 motherboard.
9) The DY26 doorphone does not function:
a) Check the cabling of the doorphone,
b) Replace the doorphone,
c) Replace the MB48 motherboard.
10) LB or TE is displayed on the consoles and feature phones:
a) Check the cabling of all the consoles, feature phones and direct station
select modules,
b) Replace the MB48 motherboard.
11) One of the telephones have no dial tone:
a) Check the cabling of the telephone,
b) Replace the telephone,
c) Check the related extension circuitry of the MB48 motherboard (or EXP48
module), and replace the motherboard (or expansion card) if no dial tone is
received.