Service manual

UX-A255U
2. Diagnostic items
1 SOFT SWITCH MODE Soft switches are displayed and changed. List can be output.
2 ROM & RAM CHECK ROM is sum-checked, and RAM is matched. Result list is output.
3 AGING MODE 10 sheets of check patterns are output every 5 minutes per sheet.
4 PANEL KEY TEST Panel keys are tested. Result list is output.
5 CHECK PATTERN Check pattern is output.
6 SIGNAL SEND MODE Various signals of FAX communication are output.
7 MEMORY CLEAR Back-up memory is cleared, and is set at delivery.
8 SHADING MODE Shading compensation is performed in this mode.
9 ALL BLACK PRINT To check the print head, whole dots are printed over the interval of 2 m.
10 AUTO FEEDER MODE Insertion and discharge of document are tested.
11 ENTRY DATA SEND Registered content is sent.
12 ENTRY DATA RECEIVE Registered content is received, and its list is output.
13 FLASH MEMORY CHECK Checks flash memory write/read.
14 FLASH MEMORY CLEAR Checks flash memory clearing.
[2] Diagnostics and service soft switch
1. Operating procedure
(1) Entering the diagnostic mode
Press FUNC → 9 → → 8 → # → 7 , and the following display will appear.
ROM Ver. TA18 After 2 sec: DIAG MODE
TA18
Then press the START key. Select the desired item with the key or the # key or select with the rapid key. Enter the mode with the START key.
(Diag•specifications)
If the diag mode cannot be set, repeat the diag mode operation, per-
forming the following operation.
After the power is turned on and "WAIT A MOMENT" is indicated, press
the STOP key.
2 – 2
In relation with the process response (request from Production
Engineering) "WAIT A MOMENT" clock indication may appear depending
on STOP key timing. If the STOP key is held down, "MEMORY CLEAR?"
appears.
START
KEY
STOP
KEY
+
"Power ON"
Memory clear
(Work + Backup)
FUNC
DIAG MODE
9 8 7
STARTSoft switch mode
START
ROM & RAM check
START
Aging mode
START
Panel key test
START
Check pattern
STARTSignal send mode
START
TA18
STARTMemory clear
Entry data send
START
Entry data receive
START
START
Flash memory check
Flash memory clear
START
Auto feeder mode
START
All black print
START
Shading mode
START
ITEM No. Contents Function