Service manual

Booting the System and Isolating System Faults
The boot sequence can be divided into two main sections
1) Console system boot
2) Encore Automation system boot
Console system boot
System Reset and Link Activity on Reset
A system reset will cause the console to re-start in the same manner as performing a cold
boot.
The Transputer Link Topology must be used when fault finding the reset path and
Transputer link connections - see Section 1.1.
Boot Sequence
The FileServer area of the SPS control card will be booted.
The FileServer now resets the MCS card, and the Automation and Allocation processors on
the SPS control card.
The Allocation processor resets the QuadMADI (slot 1 SPS) and the first XSP (slot 2) in the
chain. Each ESP resets the next ESP in turn. The QuadMADI resets the TransyncPLUS and the
next QuadMADI in the chain.
The Automation processor resets the System Master Module in the console. This module, in
turn, resets the remaining console modules. Progress messages will appear on the
console’s electronic scribbles showing channel information and mix restoring.
A reset through the system can be visually monitored by observing the RED reset LED
immediately to the right (if horizontal) or underneath (if vertical) of the 4 green link LEDS on
each transputer cards.
Any break in the reset path can be caused by either;
1) Faulty cable or no cable connection
2) Faulty PCB or module
If a reset has been lost to the next cardframe in the chain then check the Tranlink cable that
connects the two 25 way D-types that are involved.
If a visual inspection proves good then a continuity check of the cable can be done also
testing for shorts to the D-type shell. If the Tranlink tests OK then the problem may lie with the
internal service cable.
If all cables prove to be good then the transputer card transmitting the reset out of the parent
cardframe is faulty, (in this case the QuadMADI).
In the event that a reset line within the system needs to be monitored by a scope then attach a
probe to the RED connection of the relevant services cable. The signal is normally high going
low on reset.
Digital Service Manual
Issue 3 Page 8