Intercall 600/700 Installation & Operation Guide Issue 4.27 Page 77 of 78
L747 Universal Interface Faults
FAULT CAUSE CURE
F25A. L747 Red LED not flashing No Connection to Network
No Supply to Network
No output device connected to 25way socket on L747
Output device giving ‘busy’ signal
L747 DIL switches set incorrectly.
DPU414 DIL Switches set incorrectly
See page 38
See DPU414 manual page 17
F26. Printer Showing incorrect date or time British Summer Time not set.
L747 needs to be re-programmed
Press BST/GMT button See page 38
Use 747set.exe utility See page 38 and 73
F27. Extra Line feed space in between printout JP1 and JP2 jumpers fitted in parallel mode.
DPU414 DIL Switches set incorrectly
See page 38
See DPU414 manual page 17
F28. Printer/Pager reporting ‘lost’ devices Excessive Capacitance on Network See capacitance faults on page78
F29. RS232 data input/output problems Incorrect cable connections – Use L747SL lead only.
L747 DIL switches set incorrectly.
JP1 jumper must be fitted for serial I/O.
RS232 Baud rate can be 1200bps or 2400bps only (DIL
SWITCH 7)
RS232 format is only: 8 data bits, 1 stop bit, no parity.
See page 38.
F30. L747 + DPU414 Thermal Printer problems All L747 DIL Switches must be[0FF] for this mode.
DPU414 DIL switches must be set to Parallel Data Input.
JP1 and JP2 jumpers should be removed.
The Printer must be powered up and on line.
Use standard parallel printer data lead to connect L747 to
DPU414.
F31. L747 + SCOPE Serial RS232 pager mode JP1 and JP2 jumpers must be fitted
The Scope Kit must be powered up with the red led on
and the green led off.
You may use the LIMKIT 747set PC utility software to
change the pager id
Use L747SL RS232 Scope data lead (supplied by
Intercall) to connect Scope kit to L747
Use L747 – Null Modem data lead (see page 73)
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