Error Sources; Notes About Fault Location; Data Transmission; Display - Novexx Solutions AP 5.4 Service Manual

02/10 Rev. 5.05-00

Error sources

Notes about fault location

Status reports should be printed to check the mechanical and electronic func-
tion capabilities – provided that no obvious no defectives are evident.

Data transmission

Problem
No or damaged data Faulty data cable
[Tab. 1] Possible faults caused by data transmission

Display

Problem
Display dark
Button function
faulty
[Tab. 2] Possible faults at the display
SERVICE MANUAL
AP 5.4 – AP 5.6
Possible cause
Wrong interface selected
Setting of transmission
parameters incorrect
Faulty pin assignment of
the data cable
Incorrect handshake
signals
Selection
CPU board defective
Permitted cable length
exceeded
Possible cause
Plug connector loose
Display defective
CPU board defective
Plug connector loose
Buttons defective
CPU board defective
Solution
Check, if the right data cable is applied
INTERF. PARAM. >
Check, if parameter
EASYPLUGINTERPR> Interface
Check, if the transmission parameters for the
selected interface are set correctly (not for
Centronics)
Change or replace data cable. The pin assign-
ment of the interfaces can be found in topic
section „Service Electronics", chapter „CPU
board", „Connectors".
Check parameter setting (only for serial inter-
face)
Select standard character set
Check and if necessary replace CPU board
Do not exceed cable length
Solution
Check and if necessary plug in again
Check and if necessary replace display
Check and if necessary replace mainboard
Check and if necessary plug in again
Check and if necessary replace buttons or dis-
play board
Check and if necessary replace mainboard
Fault Location
is set correctly
2