4DP950 Rev2
(4D35 Service Manual)
Page 2 of 2
3. Hitachi Processor (3D3600/4D3600)
Only: Check for the presence of IC U36
(A), near the upper front corner of the
main printed circuit board. Check
whether pin 3 of U36 has been severed
from the main printed circuit board, and a
small busswire jumper soldered between
pins 3 and 2.
If this modification has not already been
accomplished, please do so at this time,
being careful not to overheat U36 with
the soldering iron.
4. The power supply is mounted on the ver-
tical mounting panel behind the main
printed circuit board. Remove the two
rear screws and the two bottom screws
securing the power supply mounting
panel and lift the entire assembly out far
enough to access the power supply.
5. Identify and disconnect the wiring har-
ness connections from the power supply
terminal strip. Note the wire colors and
the corresponding connectors.
6. Remove the four screws and nylon wash-
ers from the power supply board.
7. Replace the old power supply with the
new one and reassemble by reversing
steps 1-6.
red
black
black
violet
yellow
orange
green/yellow
blue/white
brown/white
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