Agilent Technologies 8753ES, Руководство по обслуживанию

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Chapter 10 10-13
Service Key Menus and Error Messages
Service Key Menus
Display Tests These tests return a PASS/FAIL condition. All six amber front panel
LEDs will turn off if the test passes. Press
to exit the test. If any of the six LEDs
remain on, the test has failed.
Table 10-9 Display Tests
Test
Number
Test Name Description
59 Disp/cpu com Checks to confirm that the CPU can communicate with the A19 GSP board. The
CPU writes all zeros, all ones, and then a walking one pattern to the GSP and
reads them back. If the test fails, the CPU repeats the walking 1 pattern until
is pressed.
60 DRAM cell Tests the DRAM on A19 by writing a test pattern to the DRAM and then
verifying that it can be read back.
61 Main VRAM Tests the VRAM by writing all zeros to one location in each bank and then
writing all ones to one location in each bank. Finally a walking one pattern is
written to one location in each bank.
62 VRAM bank Tests all the cells in each of the 4 VRAM banks.
63 VRAM/video Verifies that the GSP is able to successfully perform both write and read shift
register transfers. It also checks the video signals LHSYNC, LVSYNC, and
LBLANK to verify that they are active and toggling.
64 RGB outputs Confirms that the analog video signals are correct and it verifies their
functionality.
65 Inten DAC Verifies that the intensity DAC can be set both low and high.
Preset
Preset