Barnstead International Thermolyne 859 Series, Service Manual

Page: 83 / 118

83
4. Next, unhook the wire harnesses that secures
the control assembly in place. IT IS VERY
IMPORTANT THAT YOU NOTE WHERE
EVERY WIRE HARNESS IS CONNECTED
BEFORE STARTING TO UNPLUG THEM.
There are a total of TEN different wire harness-
es in the front that need to be disconnected and
one grounding strap. (See photo. Wire and
strap placement is indicated by white X’s.)
Starting from the left (facing the unit), discon-
nect the following:
a. Gray ribbon cable from the printer.
b. 2 red wires and two black wires running from
the green power switch that needs to be discon-
nected from the lower right hand corner of a sil-
ver "box" (red wires go towards the balance
when plugging back in).
c. On the upper left hand side of the same sil-
ver "box", you will find 2 orange and 2 yellow
wires that need to be disconnected. (Two
orange wires go towards the inside of the unit
when you go to plug that connector back up.)
They are the door switch wires.
E
QUIPMENT
T
EST
P
ROCEDURE
10 wires to disconnect, plus grounding strap to slide control panel out of unit
Front of unit with control panel hinged downward