Kurzweil K2000 - Scanner Diagnostics - LCD Mode (v0.4)

SECTION 4
DIAGSO _ to DOC 12/ 22/ 92
execute the 2nd NVRAM test. If a failure is indicated, power is not being
delivered from the batteries to the non-volatile RAM. Check the batteries
and the connection from the batteries to the engine board.
4.14.18
2nd NVRAM Test
This is the second part of the non-volatile RAM test, as described in the
preceding paragraph.
4.15
4.16
DIAGNOSTIC DISPLAY MESSAGES
Address Fail
Complete
Data Fail
Even Fail
Fail
Not Found
Odd Fail
Success
Error in the address test stage of the memory test
Test completed
Error in the data test stage of the memory test
Error in the high byte
Test failure
SCSI device or sound RAM not found
Error in the low byte
Successful test
K2000 SCANNER DIAGNOSTICS
This section explains the use of the K2000's scanner diagnostics, which
enables confirmation of the proper function of numerous front panel buttons
and controls.
The K2000 uses a separate microprocessor to scan the keyboard, read the
performance controls, and operate the front panel buttons and LEOs. This
processor, which is called the Scanner, then communicates its findings to the
main 68301 processor (CPU). The scanner is on the Audio/Power board (at
location U30) and is a single-chip, 6502-derived processor. Many potential
failures and problems in the K2000 originate in devices serviced by the
scanner. Thus the scanner has its own diagnostic routines to enable the
tester to see directly how the keyboard, performance controls, and panel
buttons/LEOs are performing.
There are two different diagnostic routines built into the scanner software.
The simpler routine can be entered only at power-up and can function
regardless of whether the engine board and/or LCD display is functioning
properly (an engine board must still be connected to provide clock signals,
however) . This diagnostic routine reads out in binary format via the 8 LEOs,
and consequently is called the LED Scanner diagnostic.
The other diagnostic routine can be entered at any time, and uses the LCD to
display its results. Of course the engine board and LCD must be connected
and functioning properly to see the results. The LCD diagnostic routine is
easier to read than 8 binary-coded LEDs, so in most cases you'll want to use
it rather than the LED routine.
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