AVME941X/946X DIGITAL I/O BOARDS
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5.0 SERVICE AND REPAIR INFORMATION
This chapter provides instructions on how to obtain service and repair assistance, service procedures, and
component parts lists.
5.1 SERVICE AND REPAIR ASSISTANCE
It is highly recommended that a non-functioning board be returned to Acromag for repair. Acromag uses tested
and burned-in parts, and in some cases, parts that have been selected for characteristics beyond that specified by
the manufacturer. Acromag has automated test equipment that thoroughly checks the performance of each
board. When a board is first produced and when any repair is made, it is tested, placed in a burn-in room at
elevated temperature, and retested before shipment.
Please refer to Acromag's Service Policy Bulletin or contact Acromag for complete details on how to obtain parts
and repair.
5.2 PRELIMINARY SERVICE PROCEDURE
Before beginning repair, be sure that all of the procedures in Chapter 2, Preparation For Use, have been followed.
The procedures are necessary since the board has jumpers that must be properly configured.
CAUTION
POWER MUST BE OFF BEFORE REMOVING OR INSERTING BOARDS
Note: It has been observed that on occasion, a "boot" program for a disk operating system will "hang" waiting for
the VMEbus SYSFAIL* signal to be released by an intelligent disk controller board. Acromag's non-intelligent
slave boards assert the SYSFAIL* signal as described in the VMEbus Specification Rev. C.1 and therefore, the
disk operating system will remain "hung". The best solution to this problem is to correct the boot program so that it
is no longer dependent upon the SYSFAIL* signal. When this solution is not practical, it is possible to disconnect
the SYSFAIL* from the circuitry on the Acromag board by cutting a PC board foil near the P1 connector on the
solder side. Caution should be exercised so as not to cut any other foils nor damage the board in any other way.
Call Acromag's Applications Engineering Department for assistance.
5.3 PARTS LISTS
Parts Lists are provided as an aid to the user in troubleshooting the Board (also reference the schematic and part
location drawings. Tables 5.1A to 5.1D list the parts installed on the main board for the various models; similarly
Tables 5.2A to 5.2C list parts for the LED expansion board. Replacement parts and repair services are available
from Acromag.
Changes are sometimes made to improve the product, to facilitate delivery, or to control cost. It is therefore
important to include the Component Reference Number, the Acromag Part Number, the Board Model Number,
and the Board Serial Number when providing information to order parts.
