Kurzweil K2000 Service Manual page 26

SECTION 2
PWRCHECK.DOC
12/22/92
2.16
2.16.1
2.16.2
2.16.3
2.16.4
2.16.5
2.16.6
2.16.7
2.16.8
K2000 POWER-UP CHECK OUT
VISUAL:
• Inspect unit for signs of damage or omissions.
• Verify the correct power entry module is configured
for proper AC voltage.
• USA units should have white nylon dot in the 120
volt positions.
• When converting to another voltage; fuse value may
require change.
• (Refer to appendix 4 of Musicians Guide)
POWER UP:
• Normal sequence is: LCD back light comes on.
• All eight LEOs blink in unison once.
• LCD displays "Welcome" message.
• Program mode LED lights and LCD displays Program
mode data.
• (Refer to chapter 2 of Musicians Guide)
LEOs BLINK TWO TIMES:
• If the Pitch Wheel range is not within 120 to 136
range.
LEOs BLINK THREE TIMES:
• If the battery voltage is below 3.2 volts.
• Note that scanner also reports a low voltage to the
engine board which will display low voltage.
POWER ON DIAGNOSTICS:
• Power on diagnostics are limited. The engine board
checks a few locations in non-volatile
RAM,
(program
RAM)
to determine whether to use stored data or
regenerate factory defaults.
• The effects processor performs basically the same
type tests for its non-volatile
RAM.
SCANNER DIAGNOSTICS:
• Test digital circuits portion of audio/power supply
board (appendix Al-3).
• To enter this mode, press buttons 4, 5, and 6
together. The eight LEOs should blink in order and
the display will display "K2061 Scanner ..• " etc.
BATTERY VOLTAGE:
• 4.2 Volts, three penlight cells
(AA
size).
Typically 4.2 to 4.3 volts.
• Less than 3 volts, replace batteries or correct wire
connection.
WHEEL CENTER:
• A minimum of 120 to a maximum 135, 127 or 128 is
mid-point. Moving the pitch up or down should
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