Scsi Interface E601 (The Communication Between The Scsi Board And The Machine Has A Fault.); Scsi Interface E603 (The Scsi Fuse Has An Open Circuit.) - Oce 3121 Technical & Service Manual

Cause Step
DC control 4
PBA
Sensor for 5
the tray posi-
tion PS16
35 SCSI interface E601 (The communication between the SCSI
board and the machine has a fault.)
Cause Step
1
PBA 2
SCSI board
System moth-
erboard

36 SCSI interface E603 (The SCSI fuse has an open circuit.)

Cause Step
1
Fuse 2
Is there conti-
nuity in the
fuse on the
SCSI board?
34 TSM Océ 3121/3122
Checks
Connect a meter to J104-2 + and to
J104-3 - on the DC control PBA.
The correct reading is 5V, when the
machine is switched ON.
Connect a meter to J104-8 + and to
J104-3 - on the DC control PBA.
The correct reading is 24V: imme-
diately after switching the machine
ON.
Checks
Turn off and then on the main
power.
Is the SCSI board firmly con-
nected to the system mother-
board?
Replace the SCSI board. Is the
problem corrected?
Checks
Turn off and then on the main
power. Is the problem cor-
rected?
Is there electrical continuity in
the fuse on the SCSI board?
Y/N Action
No Check the wiring and the
mains supply. If it is nor-
mal, replace the DC con-
trol PBA.
No Replace the sensor for the
tray position
Yes/No Action
YES End.
NO Correct the connection.
YES End
Replace the system
motherboard image proc-
essor PBA.
Yes/No Action
YES End.
NO Replace the fuse.
YES Replace the SCSI board.
Error code solving / machine fault solving