Dell 3115CN, Руководство по обслуживанию

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Chapter 2 Operation of Diag.
Version 1 2006.11.21
4.2.1.4 FontROM Test
Calculates the Font ROM checksum and compares it with the value stored in the FontROM.
Executes this test when the 016-310 error occurred.
Test result: NG (Go to FIP.) OK (Turn off/on the main power.)
This test calculates the checksum of the each FontROM, and compares it with the valid checksum
value stored in the corresponding chip beforehand. When the checksum is identical to the stored
value, this test judges the chip is normal.
4.2.1.5 EEPROM Test
Performs write/read/verify on the diag. area of the EEPROM.
Executes this test when the 016-327 and 016-323 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
The test performs read/write/verify of the test patterns (0xff,0xaa, 0x55 and 0x00) on one byte at
every 0x400 from the first address of EEPROM.
4.2.1.6 DRAM Test
Tests OPEN/SHORT with the address line of the DRAM.
Performs write/read/verify on the entire DRAM.
Executes this test when the 016-315, 016-316, 016-318 and 016-332 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
When the optional DRAM SIMM is checked and found, it checks the optional memory area.
First, the test performs read/write/verify of the increment data for the whole tested area by the
word. Then, it performs read/write/verify of the test patterns (0xffffffff, 0xaaaaaaaa, 0x55555555,
0x00000000) for the whole tested area by the word.
Normal Error
CHECK OK
FontROM ERROR
S=xxxx V=yyyy
(xxxx:calculated value yyyy:ROM stored value)
Normal Error
CHECK OK EEPROM ID* ERROR (ID*:1,2)
Normal Error
CHECK OK DRAM slot* ERROR (*ÅF0,1)