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BUS Updated 12/2011
07/2011
6-54
WorkCentre 5335 Family Service Documentation
GP 19
Initial Issue
General Procedures & Information
GP 19 Boot Sequence
Procedure
Assessment on the condition of the parts and the condition of the ESS PWB can be done
based on the ON/OFF states of the 8 LED’s on the ESS PWB. To check the condition of an
error where no Error Code is displayed, check the LED display on the ESS PWB.
As the device that can be connected differs depending on the board, it does not always mean
that diagnostic is possible. In the following table, items that are installed as features are
marked with "O".
Purpose
1.
Turn the power switch OFF, make sure that the screen display turns OFF, then turn the
main power switch OFF.
2.
Unplug the power cord from the outlet.
3.
Remove the ESS Cover.
4.
Plug in the power cord, turn ON the main power switch, then turn ON the power switch.
Check
Check the ESS PWB LED ON/OFF states, refer to (
Figure 1
) and (
Table 1
) LED Legend.
ESS PWB LED’s 0, 1, 2, 3 are Green; 4, 5, 6, 7 are Yellow.
Figure 1 ESS PWB On/Off LED’s
Table 1
LED legend - O”ON, x: OFF.
0
3
4
7
Table 1 LED Legend
Main Unit
Lower
Main Unit
Upper
State/Condition
Related HW
Failure Location/Details
Normal
Diagnostic
Long Boot
Diagnostic
Related
Fault Code
7,6,5,4
3,2,1,0
O,O,O,O
O,O,O,O
Initial state at Power ON
ESS
Not all are ON: Failure at power source? Failure at
ASSY?
O
O
x,x,x,x
x,x,x,O
Interrupt vector setting com-
pleted
ESS
ON: ESS Error
O
O
x,x,x,x
x,x,O,x
EBC (ROM Controller) initial-
ization completed
ESS
ON: ESS Error
O
O
x,x,x,x
x,O,x,O
D-Cache zero clear
ESS
ON: ESS Error
O
O
x,x,x,x
x,O,O,O
DDR output buffer is enabled
Software wait processing
ESS
ON: ESS Error
O
O
x,x,x,x
O,x,x,x
DDR Controller usual initial-
ization start
ESS
ON: ESS Error
O
O
O,x,x,x
O,x,x,x
Recovery processing from
CPU OFF start
ESS
ON: ESS Error
O
O
O,O,O,O
x,x,x,x
DDR initialization has failed
RAM
Blinking: RAM Error
O
O
O,O,x,x
x,x,x,x
Save data check error
RAM
Blinking: RAM Error
O
O
x,x,x,x
O,x,x,O
DDR initialization has com-
pleted
RAM
ON: RAM Error
O
O