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The current EEPROM content is saved in the ARS system, two inverse test patterns are wntten,
verified and subsequently the original data from the ARS system is written back. While this
procedure is in progress, the decimal point of the 10th digit lights up. If the decimal point goes off
afterwards, the procedure was Ok. If the decimal point flashes on and off constantly, (even in
normal operation), this indicates an EEPROM error. The real EEPROM test via test pattern does
not depend on the function of the ARS system, as this is only used as an intermediate memory
for the current data. If the ARS system is not working, the EEPROM data is lost nevertheless.
5 SAVE EEPROM DATA VIA SYSEX
The current EEPROM content is transmitted to the Midi Output via MIDI system exclusive
messages, without involving the ARS system. This data can be recorded and later played back
into the unit. The ARS system must be working, however, for this procedure to be carried out.
6 DELETING EEPROM DATA
The current EEPROM content is deleted completely (returns to original). The Fx 70 then reads
all data from the EPROM.
7 LED TEST PATTERN
The following test patterns are issued to the LED driver: 111111... (= all LED's light up).
101010... (every second LED lights), 010101... (« every second LED dark), 000000...
(= all LED's dark).
8 MIDI TEST 31.25 kBAUD WITH EXTERNAL CLOCK DIVIDER
A test pattern is issued at the MIDI OUT and is then checked at the MIDI IN. Therefore a
connection between MIDI OUT and MIDI in must be made. When all displays go dark briefly,
and the unit resumes its normal function, the test was OK. The seven-segment display indicates
the following possible errors: "E.1" for Timeout Error, "E.2" for Framing Error, "E.3" for Data Error
and "E.4" for Overrun Error.
9 MIDI TEST 62.5 kBAUD WITH INT. CLOCK DIVIDER
As before, whereas here, the CPU internal frequency divider is used instead of the CPU external
frequency divider (./.4).
10 KEYBOARD TEST
The keyboard is interrogated without software debouncing and one number of whatever key has
been pressed is indicated in the display. In the case of keys on the front PCB, the corresponding
LED is also activated. The key number "00" represents "no key pressed" andfor "several keys
pressed". The Remote foot switches and not printed Service keys are also numbered, resulting in
the key numbers "01" to "24". This test is only concluded with Hardware Reset (Power O
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