Olivetti PR4 SR Service Manual page 32

For a detailed description of Ref. 7, press any key
and the LEDs will assume one of the following
configurations:
Ref. Ref. Ref. Ref. Ref. LED Indications on the Console LED Indications on the Console LED Indications on the Console LED Indications on the Console LED Indications on the Console
1 1 1 1 1
2 2 2 2 2
3 3 3 3 3
4 4 4 4 4
XYAA6336
Failure Signaled Failure Signaled Failure Signaled Failure Signaled Failure Signaled
ROM test error
RAM test error
Faulty MICR
EPROM access failure
Service Manual
Corrective Action Corrective Action Corrective Action Corrective Action Corrective Action
Replace the electronic board
Replace the electronic board
See the related section
Replace the electronic board (basic)
3-3