Table of Contents
Advertisement
MAINTENANCE
I
r~I.II'
INTRODUCTION
This section tells how the MUX can be maintained.
MAINTENANCE
If
the MUX card did not pass the self -test described in Section II, it is recommended that you return
the card to Hewlett-Packard. If further testing is desired, however, a diagnostic test hood, which tests
slightly more of the card's circuitry, can be ordered. The diagnostic test hood part number is
0950-1659.
To test the MUX card using the diagnostic test hood, perform the following:
1. Turn computer system power off.
2. Connect the test hood to connector J2 on the card.
3. Refer to the appropriate computer system manual to determine if the self -test is run either au-
tomatically at power-on, or only when specifically invoked by you.
4. Turn on computer system power.
5. When the self -test executes, the LED located on the test hood and the LED located on the MUX
card both should light briefly and go out if the card passed self -test. If the LEDs do not light at
all, the card is defective. If the LEDs stay lit, the card did not pass self -test.
If
desired, isolation to a defective part may be performed. Please be advised, however, that such work
is at your discretion and is your responsibility; moreover, NOTE THAT EITHER CUSTOMER REPAIR
OR MODIFICATION OF THE MUX CARD WILL INVALIDATE WARRANTY AND RENDER THE
CARD
INELIGIBLE
FOR EITHER EXCHANGE OR REPAIR
BY HEWLETT-PACKARD
COMPANY. If such service is performed; the replaceable parts information in Section VI and the
schematic logic diagrams in Section VII will be of assistance.
Advertisement
Table of Contents
