Planmeca Proline CC, Technical Manual

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Chapter C - HELP & ERROR MESSAGES
C-10 Planmeca Proline CC panoramic x-ray
Technical Manual
3.9 Errors 70-75 (software errors)
Er 70 Conflicting commands in communications line
If the generator processor is receiving conflicting commands from the keyboard processor (for
example drive cassette back and forth at same time) the operation command is ignored, all activ-
ity is ceased and this error code is sent to the keyboard processor to be put on the display.
- Not matching software versions in generator and keyboard processors
- Faulty keyboard processor board
Er 71 Generator processor program memory failure
At power up the generator processor calculates a check sum from the program memory circuit
(EPROM). If it doesn’t match all operation is ceased and an error code is sent to keyboard proc-
essor. If the EPROM is completely broken it is obvious that this kind of error code cannot be sent
but more likely the Er 61 will be displayed. This error indication is merely meant to detect a single
EPROM failure before complete break down.
- The generator processor EPROM is to be changed immediately
Er 72 Keyboard processor program memory failure
At power up the keyboard processor calculates a check sum from the program memory circuits
(EPROM). If it doesn’t match all operation is ceased and an error code is displayed. If the
EPROM is (are) completely broken it is obvious that this kind of error code cannot be displayed
but more likely the equipment does nothing. This error indication is merely meant to detect a sin-
gle EPROM failure before complete break down.
- The keyboard processor EPROMs are to be changed immediately
Er 73 Keyboard processor program error
If the keyboard processor detects an illegal command (from EPROM) it will stop and give this
error indication. Most likely faulty component on the keyboard processor board. A single hazard-
ous code error is also possible.
- If appears more than once, replace keyboard processor board.
Er 74 Keyboard processor operating improperly
There is a so called watchdog circuit both in the generator processor and in the keyboard proces-
sor. If the microprocessor does not perform its program but is running wildly, this circuit will stop
the operation within 0.1 second. If it was only a hazardous error the microprocessor will recover
and indicate this error. If there is a serious problem on the keyboard processor board the equip-
ment will most likely do nothing and blank the display after this kind of an error. Replace the key-
board processor board.
NOTE If the generator processor is not working properly the error is indicated by Er 61. In some
cases it might happen that the improperly operating generator processor generates Er 74
by overloading the keyboard processor. Check by disconnecting generator processor.
Er 75 Keyboard processor operating improperly
The keyboard processor has a peripheral IC called ASIC (PM 2002IC) which controls input and
output functions of the CPU board. This chip has for some reason lost its configuration and the
microprocessor has detected it.
- If appears more than once, replace keyboard processor board.
3.10 Errors 80-83 (microprocessor chip errors)
Er 80 Keyboard processor EEPROM failure
There is some non volatile memory for various parameters in the microprocessor chip itself. The
writing of this memory is limited to a minimum of 10 000 times that is in practice 20 years of
equipment life.
However, if this memory did fail, this error is indicated.