Trouble Shooting Guidance - Olivetti ECR 7900 Service Manual

2. TROUBLE SHOOTING GUIDANCE

In the event following abnormal symptom happened, refer to the solution corresponding to its
symptom.
No. Symptom
1 No Power.
2 Winding reel does not work.
3 Main display does not work properly.
4 Rear display does not turn on.
5 Key operation unable.
6 Drawer does not open.
7 Drawer does not close.
8 Buzzer does not beep.
9 Cannot work memory backup.
10 Can not print properly.
11 Scanner does not work.
12 Cannot use USB I/F
13 Cannot use SD card
20
Check point / Detailed symptom
Check the Power supply circuit. - - - Try STEP 1&2
If Power supply circuit is OK, check RESET circuit.
Start up Diagnostic software.
If it doesn't work through the Diagnostic software, start
Diagnostic software again and check voltage.
No display but backlight turns on.
Display OK but backlight does not turn on.
No display / No backlight.
Check the power supply of the display tube.
All keys do not work at all.
Only a specific key does not work.
Drawer does not open when it is not locked by a
drawer lock key.
Drawer remains opened or does not close.
No buzzer sound when [clear] key is depressed.
Check whether the batteries are supplied or not.
Check the voltage of each battery.
Check voltage.
Cannot print or cannot Feed paper.
Faded print or run print.
Cannot cancel Head-up sensor error
Cannot cancel Paper-end sensor error
Head-up sensor or Paper-end sensor does not work.
Scanner head lamp does not light up when power ON.
Scanner head lamp lights up but can't read a barcode.
Cannot work the USB port.
Cannot write or read the data for SD card.
ECR 7900 Service Manual
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