IBM System/360 2050 User Manual

Port 2
No
isee Note)
Intermittent failure.
Rerun and look for
lowest failing
routine and test
Yes
Yes
Yes
Yes
1. Refer to the selector channel scan
documentation for the foiling series.
o. Determine objective of the test.
b. Note procedure for the test.
2. Determine time cycle from the printout
(time the logout occurred).
3. Refer to the IOP 2XX poges os indicated
by time cycle.
J:::lm.A.: If time cycle indicates o requut
for o routine, refer to the request
circuits in the Selector Channel FETOM.
~Scoping loop:
Do IAR repeat on the diagnose address
for the foiling test. Use FCS ROS addre11 for sync.
To check. length of test, scope OlA C3C5D06,
Negative shift is the end of test,
To see the indicators os they ore at the end
of test lift IAR repeat switch.
Possible ho1dco1e
foi lu1 e. T1 oubleshoot
f1om failing trigge1
/see Note)
PouiHe test chon failu1e,
Troubleshoot f1om failing
trigger. Fo1 additional
information, refer to
"Test Channel" in the
Selector Chonnel FETOM
hee Note)
Pouible failure in
the selector chon
error clct , Refer to
the Selector Channel
ECADs in Vol 1 of
ALO.
hee Note)
No
Go bodcwa1d on
the IOP 2XX poges
ta the previous
time cycle or
routine
No
(01,,inue going
back in time looking
fo1 the cause rothe1
1hon the symptom
l. The IOP 2XX page should show the ALO poge
fo1 the net in the erro1 list that hos beel"I
determined as tieing the probable cause of
the error,
2,_Follow the net bock in the ALOs.
FIGURE 43. SELECTOR CHANNEL PROGRESSIVE SCAN RUN AND REPAIR PROCEDURE (PART 3 OF 3)
68 (3/71) Model 50 FEMM
Yes

IBM System/360 2050 Specifications

General

Brand	IBM
Model	System/360 2050
Category	Computer Hardware
Language	English