Sharp UX-108, Service Manual

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UX-108DE
3. Diagnostic items description
3. 1. Soft switch mode
Used to change the soft switch settings.
The soft switch which is stored internally is set by using the keys.
The available soft switches are SW-A1 to SW-L2.
The content of soft switches is shown in page 2-5 to 2-15.
The contents are set to factory default settings.
3. 2. ROM & RAM check
ROM executes the sum check, and RAM executes the matching test.
The result will be notified with the number of short sounds of the buzzer
as well as by printing the ROM & RAM check list.
Number of short sounds of buzzer 0
→
No error
1
→
ROM error
2
→
RAM error (32Kbyte)
3. 3. Aging mode
If any document is first present, copying will be executed sheet by sheet.
If no document is present, the check pattern will be printed sheet by
sheet. This operation will be executed at a rate of one sheet per 5min-
utes, and will be ended at a total of 10 sheets.
3. 4. Panel check mode
The mode is used to check whether each key operates properly
or not. Press the key on the operation panel, and the key will be dis-
played on the display. Therefore, press all keys. At this time, finally press
the STOP key.
When the STOP key is pressed, the keys which are not judged as
"pressed" will be printed on the result list.
• LED port of the contact image sensor (CIS) is kept on during the
term from when start of the panel test mode to end with the STOP
key.
3. 5. Check pattern mode
This mode is used to check the status of print head. Two sheets of check
pattern are printed. The following information of check pattern is printed.
1
Vertical stripes (alternate white and black lines) Approx. 35 mm
2
Full black Approx. 70 mm
3
Full white Approx. 35 mm
3. 6. Signal send mode
The mode is used to send various signals to the circuit during FAX com-
munication. Every push of START key sends a signal in the following
sequence. Moreover, the signal sound is also output to the speaker when
the line monitor of the soft switch is on.
[1] No signal (CML signal turned on)
[2] 9600bps
[3] 7200bps
[4] 4800bps
[5] 2400bps
[6] 300bps (FLAG)
[7] 2100Hz (CED)
[8] 1100Hz (CNG)
[9] END
3. 7. Memory clear mode
This mode is used to clear the backup memory and reset to the default
settings.
3. 8. Shading mode
The mode is used for the shooting compensation. For reading, set up
the special original paper.
The shooting compensation memorizes the reference data of white and
black for reading.
Moreover, the memorized data is not erased even if memory clear mode
is executed.
3. 9. All black mode
The mode is used to check the state of the printing head and inten-
tionally overheat it. Whole dots are printed over the interval of 2 m. If it is
overheated or the printing sheet is jammed, press STOP key for the end.
3. 10. Auto feeder mode
In this mode, a document is inserted and discharged to check the auto
feed function.
After this mode is started, set a document, and the document feed will
be automatically tested.
3. 11. Message print mode
Used to print the displayed message of communication for translate each
language.
3. 12. Ring & Dial free mode
Used to reject dial tone check while autodialing is carried out. And used
to change the bottom Ring frequency of auto-receiving to 13Hz.
2 – 3
1
2
3
RANK 0 or 1
Note:
There is a selection RANK 0 or 1 depending on resistance value of the
thermal head. RANK 0 or RANK 1 is printed at the tail of check pattern
to identify.