HP FAX-750 Service Manual - Page 152

Error Indication

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1. ERROR INDICATION To help the user or the service personnel promptly locate the cause of a problem (if any), the facsimile equipment incorporates the self-diagnostic functions which display error messages for equipment errors and communications errors. For the communications errors, the equipment also prints out the transmission verification report and the communications list. 1.1 Equipment Errors If an equipment error occurs, the facsimile equipment emits an audible alarm (continuous beeping) for approximately 4 seconds and shows the error message on the LCD. For the error messages, see [ 1 ] below. As one of the error messages, "MACHINE ERROR _ _" includes an error code which indicates the detailed error causes listed in [ 2 ]. To display an error code for the other latest error message or detailed message, make the equipment enter the maintenance mode and press 8 and 2 keys (for details, refer to Chapter V, Section 3.12). [ 1 ] Error messages on the LCD Messages on the LCD CHECK PAPER (NOTE 1) TOP COVER OPEN DOCUMENT JAM Probable Cause (1) The paper-edge sensor detects that no recording paper is present. (2) The paper ejection sensor detects that a paper jam has occurred . The cover sensor detects that the recording paper cover ASSY is not closed. n Document jam (1) The document length exceeds the limitation (400 or 90 cm) registered by firmware switch WSW16. (Refer to Chapter V, Section 3.5.) (Both the document front and rear sensors stay ON even after the document has been fed by the registered length.) (2) The document rear sensor detects no trailing edge of a document after the document has been fed by 400 cm. (The document rear sensor stays ON even after the document has been fed when the document front and rear sensors were OFF and ON, respectively.) NOTE 1: If a recording paper feeding or ejecting error occurs in the maintenance mode, this "CHECK PAPER" message will not appear on the LCD but some 4-digit error code listed on page VI-4 will appear instead. VI - 1

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VI
- 1
1.
ERROR INDICATION
To help the user or the service personnel promptly locate the cause of a problem (if any), the
facsimile equipment incorporates the self-diagnostic functions which display error messages for
equipment errors and communications errors.
For the communications errors, the equipment also prints out the transmission verification report
and the communications list.
1.1
Equipment Errors
If an equipment error occurs, the facsimile equipment emits an audible alarm (continuous beeping)
for approximately 4 seconds and shows the error message on the LCD.
For the error messages,
see [ 1 ] below.
As one of the error messages, “MACHINE ERROR _ _” includes an error code
which indicates the detailed error causes listed in [ 2 ].
To display an error code for the other latest error message or detailed message, make the
equipment enter the maintenance mode and press
8
and
2
keys (for details, refer to Chapter
V
,
Section 3.12).
[ 1 ]
Error messages on the LCD
Messages on the LCD
Probable Cause
CHECK PAPER
(NOTE 1)
(1)
The paper-edge sensor detects that no recording paper is
present.
(2)
The paper ejection sensor detects that a paper jam has
occurred .
TOP COVER OPEN
The cover sensor detects that the recording paper cover ASSY is
not closed.
DOCUMENT JAM
n
Document jam
(1)
The document length exceeds the limitation (400 or 90 cm)
registered by firmware switch WSW16.
(Refer to Chapter
V, Section 3.5.)
(Both the document front and rear sensors stay ON even
after the document has been fed by the registered length.)
(2)
The document rear sensor detects no trailing edge of a
document after the document has been fed by 400 cm.
(The document rear sensor stays ON even after the
document has been fed when the document front and rear
sensors were OFF and ON, respectively.)
NOTE 1:
If a recording paper feeding or ejecting error occurs
in the maintenance mode
, this "CHECK
PAPER" message will not appear on the LCD but some 4-digit error code listed on page VI-4 will
appear instead.