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Page Title:
Removal and Replacement of Bottom Panel Harness Assembly A7Wl |
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 TM 11-5895-1179-13 EE132-EA-OMP-010/E106 KY883 TO 31S1-2GSC-161
b.
Release the four front panel assembly fasteners (figure 2-1), lower the front panel assembly, and remove the
chassis cover.
c.
Position the chassis cover in place, install the eight chassis cover screws.
d.
Close and secure the front panel assembly.
5-7.
Removal and Replacement of Bottom Panel Harness Assembly A7Wl
a.
Remove the chassis cover and the four plug-in-circuit card assemblies as described in paragraphs 5-6 and 4-7,
respectively.
b.
Make certain capacitors A7C1 and A5A1Cl (figures 5-5 and 5-6) are discharged. Remove the terminal board
covers from A7TB1 and A7TB2 (figure 5-5). Disconnect all leads on the inner sides of A7TB1 and A7TB2 except
A7TBl-1, -3, -6, -13 and -15; and A7TB2-15 and -17. Cut the tiedown straps as necessary and remove the bottom
panel harness assembly.
c.
Connect the replacement bottom panel harness assembly leads disconnected in step h, using table 5-2 as a
guide. Use a heat sink for those connections using solder. Use tiedown straps to replace those removed in step b..
Table 5-2. Bottom Panel Harness Assembly Wiring Chart
From
To
Wire
Type
Type
Length
AWG Size
Location
Connection
Location
Connection
(Inches)
and Color
A7TB1-2
Terminal Lug
A7CR2-AD
11.00
16, brown
A7TB1-4
Terminal Lug
A7CR1-AD
11.00
16, red
A7TB1-5
Terminal Lug
A7TB2-13
Terminal Lug
15.50
14, white/
orange
A7TB1-7
Terminal Lug
A7Cl(-)
Terminal Lug
8.50
14, yellow
A7TB1-8
Terminal Lug
Chassis
Terminal Lug
7.30
14, green
Ground
A7TBl-10
Terminal Lug
A7E4
7.80
22, blue
A7TBl-ll
Terminal Lug
A7E3
7.80
22, violet
A7TBl-12
Terminal Lug
A7TB2-11
Terminal Lug
13.00
18, white
A7TBl-14
Terminal Lug
A7CR4-1
3.00
18, white
A7TBl-16
Terminal Lug
A7TB2-8
Terminal Lug
13.50
18, white/
red
A7TB1-17
Terminal Lug
A7CR4-2
4.00
18, white/
green
A7Cl(+)
Terminal Lug
A7TB2-14
Terminal Lug
9.00
14, white/
orange
A7CR1
A7TB2-16
Terminal Lug
11.50
14, gray
(cath)
A7DS1(-)
Terminal Lug
A7TB2-6
Terminal Lug
4.00
22, gray
A7DS1(+)
Terminal Lug
A7TB2-5
Terminal Lug
5.50
22, white
5-8
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