38 Maintenance Manual
6.2 Electronics Module
6.2.1 Removal and Replacement of the Wrap-around
Wrap-around Removal
The electronics module can be serviced by first removing the wrap-around. Turn off
the power to the 8000 and remove the line cord. Remove the nine screws securing
wrap-around, located at the back (qty 5) and sides (qty 4) of the instrument. Ap-
ply light pressure to both sides of the wrap-around and slide wrap-around toward
the back of the instrument approximately 1 inch. You may also need to apply slight
downward pressure to keep entire instrument from sliding. The wrap-around front lip
should now be clear of bezel. Damage to bezel may occur if wrap-around is not entire-
ly clear of bezel prior to proceeding to the next step. Now, with both hands still on the
sides of the wrap-around, lift the wrap-around vertically off of the instrument. Do not
try to remove it by sliding it off over the back.
Replacement
When the time comes to replace the wrap-around, reverse the procedure used for
removal. Make sure the wrap-around front lip is entirely under the bezel. Install the
nine screws securely.
6.2.2 Removal and Replacement of Circuit Boards
The first step in replacement of a circuit board is the removal of the wrap-around. See
6.2.1 for the correct procedure.
6.2.2.1 Removal and Installation of Circuit Board Module
The Circuit Board Module contains the Connector Board (061-x172-0x), Daughter
Board (061-0171-0x), Single Board Computer (061-5315-0x), Printer Board (061-
1300-00) and Parallel Interface Board (061-0500-0X). Disconnect the Power Supply
cable from Printer Board and Daughter Board. Disconnect the printer cables (4)
from the Printer Board. Disconnect the keypad cable from the Daughter Board. The
Circuit Board Module is secured to the 8000 rear panel and chassis bottom panel
with screws. Remove the screws (4) securing the bottom metal panel to chassis
bottom. Remove screws (11) at the rear panel. The Circuit Board module is now
ready to be removed from the chassis.
Note: removal of individual circuit boards from the chassis may be performed
without removing the Circuit Board Module from the chassis. If access to SBC is
required, it is recommended that entire Circuit Board Module be removed.
Reinstallation of Circuit Board Module should be done in reverse order of removal.
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