Specifications
2. Isolate the modem from the shelf by installing the
eight (8) fiber washers (4035306P25, part of
Hardware Kit 344A4019). Insert four (4) washers
between the modem and the shelf standoffs and
place the other four (4) washers on top of the
modem board over the mounting holes.
3. Secure the modem by installing two screws (left
over from the Logic Board installation) through the
washers and modem board into the standoffs
located on the end opposite J3.
Turbo Board Installation
The Turbo Board provides the CNI with additional
memory and processing capability through dual 8051 based
processors and support circuitry. It primarily provides
additional processing power. However, it also provides real
time debug capability during development, testing, and
troubleshooting.
The Turbo Board uses mostly surface mounted
components and mounts on stand offs above the GETC
Logic Board. Electrical connections are made through a 28
conductor ribbon cable on the Turbo Board to the XU3
socket on the GETC Logic Board. Installation of a small
mechanical shield above the Turbo Board protects it from
inadvertent damage when sliding the GETC drawer in and
out of the cabinet. Additional information on the Turbo
Board assembly and maintenance instructions for the board
may be found in LBI-38822.
Use the following procedures to install the Turbo Board.
Mounting hardware for the Turbo Board is contained in
Hardware Kit 344A4019.
1. Remove U3 (19A705558P1) from the XU3 socket
on the GETC Logic Board. Observe precautions
for handling electrostatic sensitive devices
2. Bend over or slightly move any components on the
Logic Board whose height will interfere with the
Turbo Board installation.
3. Install three (3) threaded spacers 19B201955P9 in
place of the screws omitted when Logic Board was
reinstalled.
4. Install two (2) threaded spacers 19B201955P9
through the modem and into the shelf standoffs
next to J3.
5. Align the Turbo Board holes over the threaded
spacers installed in steps 3 and 4 (orient the Turbo
Board so connectors J2 and J3 are toward the rear
of the GETC Shelf).
6. Secure the Turbo Board by installing two (2) pan
head screws N80P13004B6 and two (2) lock
washers N404P13B6 through the board and into
the threaded spacers located near the front of the
GETC Shelf (near S1 and Y1).
7. Install three threaded spacers 19B201955P9
through the Turbo Board into the remaining
spacers. These will be used to mount the guard.
8. Install the guard 19B802166P1 using three (3) flat
head screws N404P13B6. The guard protects the
Turbo Board from inadvertent damage when
sliding the GETC Shelf in and out of the service
position.
9. Plug the ribbon cable from J1 on the Turbo Board
into the XU3 socket on the GETC Logic Board.
10. Install the harness assembly, 19C337712G1, by
sliding the P2/P3 end of the harness through the
hole provided into the back of the GETC shelf.
11. Connect the 19C337712G1 Harness P2 and P3 to
the J2 and J3 Turbo Board connectors,
respectively.
12. Secure the harness to the GETC shelf using
retaining strap 19J706152P5.
13. Mount the other end of the harness on the rear of
the GETC Shelf. Secure the J103/J104 support
bracket to the shelf using the two (2) nut clips
7160861P33 and self tapping screws
19A134011P1 included with the harness.
When the installation is complete, examine the GETC
Shelf for any loose hardware. You may now proceed to
modify and reconnect the GETC cables.
The modem must be insulated from the shelf mounting
standoffs using eight washers. Four washers mount on
top of the modem’s printed circuit board and four
washers mount on the bottom of the modem’s printed
circuit board.
NOTE
LBI-38986
9