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RET-041 Instructions
95307-000-01 6/87
Fig. 3: Motherboard Modification
Only for units with serial numbers below 700000)
p) Replace the 25 screws removed above.
Do not tighten screws until all screws are loosely in place.
q) Return OPTIMOD-AM to rack, connect and ground unit
1) On the motherboard, tack solder the supplied 30-gauge insulated hook-up wire from
pin 7-18 x to pin 1-U see Fig. 3).
ard, tack solder the supplied 30-gauge insulated hook-up wire from
see Fig. 3).
pin 7-V to pin 1-
n) Check your work care
y. Measure the voltage between the chassis and pin U and
between the chassis and pin V with the POS PEAK THRESH control fully counterclockwise
these voltages should be near -4.1VDC and +4.1VDC, respectively).
o) Very carefully tilt the rear panel up to the vertical position, and the push the rear panel
forward into place.
Take care that no wires are pinched between the panel and the chassis.
m) On the mothe
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