Service manual

Status and error messages
8 P2265E/F
3 SIGNAL PROCESSOR (SP) ERROR MESSAGES
3.1 INTRODUCTION
The signal processor will read the control parameters sent by the control
processor before initiating a new ping. The program will then test each
parameter against its legal values. If the parameter is found to be illegal, or
the value does not agree with the other settings, an error message code is
sent to the control processor which will issue the error message.
At power-up the signal processors will never start real pinging until all the
parameters are granted. However, in order to receive new information from
the control processor, it will simulate pinging until no errors occur.
If the error message "SP-# not responding error" is shown on the display, the
signal processor has not answered within a time-out period. This error is
probably caused by one of the following hardware errors:
1 No signal processor PCB present.
2 A new PROM set is not properly inserted in the signal processor (check
carefully).
3 The IC used for signalling is defective (U42 = 8255). This may be
checked by inserting a new 8255.
4 The FIFO system on the digital interface pcb is not working properly.
(If the sounder uses multiple frequencies, try exchanging the digital
interface boards).
5 The signal processor is defective (replace the board, if possible).