Radian Series
4
900-0128-01-00 Rev C
6.
Disconnect the ribbon cables from the PCBA Module by pressing outwards on their clips and then gently pull the
connector away from the board.
Do NOT pull on the ribbon cable. Pull on the connector.
Pulling on the
ribbon cable can damage the cable. Refer to Figure 4.
Figure 4
Ribbon Cables
7.
Remove the two lower nuts using the socket wrench with a 10 mm socket.
8.
Loosen (but do not remove entirely) the two upper nuts using the socket wrench with a 10 mm socket.
Figure 5
PCBA Module Nuts
9.
Push the PCBA Module up about 1/2 inch (13 mm). This allows the keyhole slots in the back plate of the module to
clear the two upper nuts. Pull the PCBA Module outwards to remove.
10. Install the replacement PCBA Module by reversing steps 1 through 9. Tighten the nuts in steps 7 and 8 to a
torque value of 60 to 68 in-lb. Refer to Tabke 1
for model-specific locations of transformer wires, fan wires and
ribbon cables.
11. Proceed to the
Replacement of the Front Cover
section on page 6.
Table 1
Radian Model Connection Locations
Model
Power Module
Position
Black Wire
Terminal
White Wire
Terminal
Red Wire
Terminal
Fan Cable
Terminal
Ribbon
Cable
GS8048
Left
L1 (LEFT XFMR)
N (NEUTRALS)
L2 (LEFT XFMR)
FAN LEFT
J8
Right
L1 (RIGHT XFMR) N (NEUTRALS)
L2 (RIGHT XFMR)
FAN RIGHT
J4
GS7048E
Left
L1 (LEFT XFMR)
N (LEFT XFMR)
N/A
FAN LEFT
J8
Right
L1 (RIGHT XFMR) N (RIGHT XFMR) N/A
FAN RIGHT
J4
GS8048A
Left
L1-L
NEU-L
L2-L
FAN LEFT
J8
Right
L1-R
NEU-R
L2-R
FAN RIGHT
J4
GS3548E
Left
L1 (LEFT XFMR)
N (LEFT XFMR)
N/A
FAN LEFT
J8
GS4048A
Left
L1-L
NEU-L
L2-L
FAN LEFT
J8
Pull gently on the connector
to dislodge it from the PCBA
Module.
DO NOT PULL ON
THE RIBBON CABLE.
Unlatch the clips by
pushing them in opposite
directions away from the
cable connector.
Remove these nuts
Loosen, but do not
remove these nuts
