Xerox Phaser 7100

Error Troubleshooting
Phaser 7100 Service Manual Xerox Internal Use Only2-414
Assessment Based on LED ON/ OFF States
Main Unit
Lower
Main Unit
Upper
State/ Condition
Related
H/W
Failure
Location/
Details
Chain-Link
7,6,5,4 3,2,1,0
O,O,O,O O,O,O,O Initial state at Power On I/P PWB Not all are ON:
Failure at power
source?
Failure at Assy?
X,X,X,X X,X,X,O Interrupt vector setting
completed
I/P PWB ON: I/P PWB Error
X,X,X,X X,X,O,X EBC (ROM Controller)
initialization completed
I/P PWB ON: I/P PWB Error
X,X,X,X X,X,O,O Reserved (ON)
X,X,X,X X,O,X,X Reserved (ON)
X,X,X,X X,O,X,O D-Cache zero clear I/P PWB ON: I/P PWB Error
X,X,X,X X,O,O,X, Reserved (OFF)
X,X,X,X X,O,O,O Enable software wait
processing of DDR output
buffer
I/P PWB ON: I/P PWB Error
X,X,X,X O,X,X,X DDR Controller usual
initialization start
I/P PWB ON: I/P PWB Error
O,X,X,X O,X,X,X Recovery processing from CPU
OFF start
I/P PWB ON: I/P PWB Error
O,O,O,O X,X,X,X DDR initialization has failed RAM Blinking: RAM
Error
O,O,X,X X,X,X,X Save data check error RAM Blinking: RAM
Error
X,X,X,X O,X,X,O DDR initialization has
completed
RAM ON: RAM Error
X,X,X,X O,X,O,X I-Cache/D-Cache is disabled I/P PWB ON: I/P PWB Error
X,X,X,X O,X,O,O CPU internal register setting I/P PWB ON: I/P PWB Error
O,X,X,O X,X,X,X DDR memory write check RAM ON: RAM Error
O,O,O,O X,X,X,X DDR R/W test has failed RAM Blinking: RAM
Error