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Problem Determination
Xerox 4500 PS ETH, Inst. & Operator's Guide
148
19.1.2 LED Status error messages
The LED status error messages below indicate some problems encountered
during printing.
Condition LED Status
LAN Session PRT
Unit powered off/ power failure
OFF OFF OFF
Ring failure (e.g. Ring not present
Fast
blink
OFF OFF
No LAN contact (e.g. Boot reply)
Slow
blink
OFF
OFF
Printer intervention or error/printer
cable removed
ON OFF Slow
blink on
specific
LEDs
Bad RAM
OFF Fading
ON
OFF
ON
OFF
LAN Error
ON
ON
Fading
ON
OFF
ON
OFF
Main checksum error (Microcode
download needed)
ON
ON
Fading
ON
OFF
ON
OFF
Baseblock checksum error
(Microcode download needed -
Centronics only!)
OFF Fading
ON
OFF
ON
DPRAM error (comm. error with
IPDS top)
ON
OFF
Fading
ON
OFF
ON
OFF
BOOTBLOC checksum error
(device needs new FLASH proms)
ON Fading
ON
OFF
OFF
Rear panel switch in wrong
position)
ON
ON
ON
OFF
ON
ON
LED status error messages