Xt2 With The Studio Chassis Accessory - Orban 8100A/XT2 Operating Manual

2-12
Installation
a) Remove Cards #8 and #9 and check the part number etched on their solder sides (both
cards should have the same part number).
If the part number is 30481-000-04 or above, the cards you have are the correct
ones for use with the XT2. Set the cards aside and skip to step d.
If the part number is 30481-000-03 or below, continue to step b. Rework both
cards.
b) Using a vacuum desoldering tool, desolder and lift those leads of R804 and R805
which are closest to the card ' s upper edge. Do not desolder the opposite ends. After
the leads have been freed by bending the resistors upward, clear the holes of solder
for possible future use.
The two resistors should be positioned so that the free leads cannot accidentally come
in contact with other circuits or with each other. A small piece of tape over the holes
may be helpful.
c) Carefully recheck all work done in step 6, then set the cards aside.
d) Follow the INSTALLATION INSTRUCTIONS on page 2-3.
4. XT2 WITH THE STUDI CHASSIS ACCESS RY
If you are using the 8100A/ST Studio Chassis, we recommend that the Studio Chassis and
the OPTIMOD-FM levels be matched to each other before the OPTIMOD-FM is configured
for use with the XT2. See the 8100A/ST Operating Manual for complete instructions.
Leave the covers off the Studio Chassis following level-matching to facilitate your replacing
Card #5. If you have an " old " Card #5 (part number 30741-000-01 or -02 or any part number
beginning 30451), use it during the alignment between the Studio Chassis and the 8100A/1.
If you only have a " new " Card #5 (part number 30741-000-03), set its jumpers as shown in
Fig. 2-6 and use it during the alignment.
Please note that accurate level alignment between the OPTIMOD-FM and the Studio Chassis
is much less critical when the XT2 is in use, because a stage of gain reduction has been
placed between the input of the OPTIMOD-FM and its clippers to protect the clippers from
being overdriven in the event of gain errors. But if the above suggestions are followed, the
STL will be correctly aligned for the OPTIMOD-FM with Studio Chassis even if the XT2 is
removed from the system.