Omnia 6 Use and Installation Guide – Version 1.00a
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Clearing corrupted Non-volatile RAM contents
Occasionally during a software upgrade, the contents of the motherboard's on-board non-volatile RAM
(NVRAM) will contain entries that are inappropriate for the version of software that has just been installed.
An excellent example of such behavior is a unit that has been upgraded from DSP software version 6.00.13
to 6.01.00. The different (and finer) calibration of the Limiter Output controls in the later version causes an
index mismatch in the lookup table for the controls at the first boot up. Until the user adjusts each Limiter
Mixer control manually to 're-index' the controls, the Limiter Mix values can be different from what was in
the earlier software. To reset the motherboard non-volatile RAM to prevent (or cure) such behavior, it is
necessary to temporarily remove a shunt jumper on a three pin header labeled S1 at the left rear corner of
the motherboard (see below).
1. Remove the Omnia 6 from service.
2. Make certain that no power is applied to the unit.
3. Remove all 30 top cover screws and set them aside.
4. Remove the lid and set it aside.
5. Move shunt jumper "S1" from the "NC" to the "NO" position. Wait at least 30 seconds.
6. Move shunt jumper "S1" from the "NO" to the "NC" position.
7. Re-install the Omnia lid, using all 30 screws. Tighten each screw snugly. Failure to affix the lid with
all 30 screws may compromise the units susceptibility to RF energy, as well as its electromagnetic
radiation compliance certification.
8. Return the Omnia 6 to service.
Location
of
Shunt "S1"
Photo of motherboard showing location of shunt "S1"
In order to clear the non-volatile RAM, it is necessary to move the shunt jumper from the normal operating
position labeled "NC", to the position labeled "NO". You must then leave the shunt jumper in the "NO"
position for at least 30 seconds
in order for the contents of the non-volatile to be fully cleared. Failure to
follow this advice and wait long enough may result in partial erasure of the non-volatile contents and
invalid entries in the parameter lookup tables.
