Interactive Diagnostics - Lexicon 960L Service Manual

INTERACTIVE DIAGNOSTICS:

The following section describes the operation of the Interactive Diagnostic Tests.
There are two ways that the 'Interactive Diagnostics' menu mode can be invoked, they are as follows:
1. Press & hold the 'PROGRAM' + 'ENTER' keys while powering on the LARC2, then releasing the
'PROGRAM' + 'ENTER' keys when a chase pattern appears on the Meter Board and Keypad LED's.
2. Install the Female RS-422 Wraparound (Loop Back) Plug into the connector labeled 'HOST' on the
LARC2 rear panel, then power on the LARC2.
NOTE: Do not touch any of the faders until the power on diagnostics test results have been
checked. (Touching the faders will clear the power on diagnostics test results displayed on the
Meter Bd. LED's).
NOTE: If any of the Red or Yellow LED's on the Meter Board remain lit, a diagnostic error has occurred.
NOTE: When the LARC2 has entered the Interactive Diagnostics menu mode, the Fader Touch and A/D
converter information for the fader being touched and/or moved is displayed on the Meter Board LED's. The
Red LED's (1-8) indicate which fader (1-8) is being touched respectively. The Yellow LED's act as a level
meter which displays the value read from the A/D converter of the fader being touched and/or moved
(1=Min, 8=Max). This is useful for quickly checking the operation of the Faders and A/D converters circuitry,
but the Fader/Motor Test performs more accurate testing at higher resolution.
The 'Interactive Diagnostics' menu is displayed on the LCD display after approximately 8 seconds as shown
in the example below:
Lexicon
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