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2-4 Service Manual
5016-001
948 Engine
Board
Indicates that the engine board microprocessor has
stopped. Replace the engine board assembly. Go to the
“Engine Board Assembly Removal” on page 4-19.
953 NVRAM
Failure
Indicates the NVRAM failed the CRC check. Replace the
engine board assembly. Go to the “Engine Board
Assembly Removal” on page 4-19.
954 NVRAM
CRC Failure
Indicates the engine board NVRAM failed the CRC
check. Replace the engine board assembly. Go to the
“Engine Board Assembly Removal” on page 4-19.
955 Font CRC Indicates that the font ROM failed the CRC check.
Replace the code overlay SIMM.
956 System
Board
Indicates that there was a microprocessor failure on the
controller board. Replace the controller board assembly.
Go to the “Controller Board Assembly Removal” on
page 4-19.
957 ASIC Failure
(Controller Board)
Indicates that there was an ASIC failure on the controller
board. Replace the controller board assembly. Go to the
“Controller Board Assembly Removal” on page 4-19.
958 ASIC Failure
(Engine Board)
Indicates that there was an ASIC failure on the controller
board. Replace the controller board assembly. Go to the
“Controller Board Assembly Removal” on page 4-19.
959 SRAM
Failure
Indicates that there was an SRAM failure on the
controller board. Replace the controller board assembly.
Go to the “Controller Board Assembly Removal” on
page 4-19.
960 RAM
Memory Error
Indicates that the RAM soldered on the controller board
is defective. Replace the controller board assembly. Go
to the “Controller Board Assembly Removal” on
page 4-19.
961 RAM
Memory Error
Indicates that the DRAM installed in slot 1 on the
controller board is defective. Replace the DRAM SIMM.
If this does not fix the problem, replace the controller
board assembly. Go to the “Controller Board
Assembly Removal” on page 4-19.
962 RAM
Memory Error
Indicates that the DRAM installed in slot 2 on the
controller board is defective. Replace the DRAM SIMM.
If this does not fix the problem, replace the controller
board assembly. Go to the “Controller Board
Assembly Removal” on page 4-19.
Error Code Action