Indicator Descriptions; Error Indications - Epson perfection 640U Service Manual

EPSON Perfection 640U

1.6 Indicator Descriptions

LED indicator shows the various conditions by turning on/off or blinking.
Conditions indicated by LED indicator are as listed below:
!
Status
"
Ready or receiving Push Button
Event command:
"
Stand-by or receiving Push Button
Event command:
"
Busy or initialization:
"
Error:
"
Operate OFF:

1.7 Error Indications

Refer to Section 1.5 for the error indications.
COMMAND ERROR
!
Cause: Undefined command or undefined command
parameter is received.
!
Disposition: The scanner ignores the wrong command or
parameter,( Maintain at current settings.)
Scanner sends NACK, and waits for the next
command or parameter.
!
Indicator: Red LED lighting up.
!
Remedy: Once the correct command is received, the error
condition is cleared.
Product Description
Display
Green on
Green on
Green Blinking at low speed
Red on or red blinking at high
speed or orange blibking at high
speed
Light off
Indicator Descriptions
INTERFACE ERROR
! Cause: Detects the wrong action in the communication
procedure.
!
Disposition: Lamp goes off and scanner stops operating.
!
Indicator: Red LED High speed blinking
! Remedy: Turn power off and then turn it on again.
Plug out and in the USB connector
!
Acceptable command: None
FATAL ERROR
!
Cause: Lamp is broken.
Power is turned on or command is received
without removing the transportation lock.
Scanner unit fault.
!
Disposition: Lamp goes off and the scanner stops operating.
The bit 7 of the status byte is set.
!
Indicator: Red LED High speed blinking
!
Remedy: ( After cause is remove )
Switch off the power and turn it on again.
Send initialization command (ESC @).
Plug out and in the USB connector.
!
Acceptable command: [ESC F, ESC f, ESC @]
Revision A
13