Questions - IBM 6360 Product Support Manual

$ECTION 11. ENVIRONMENT
The purpose of this section is to aid
service :personnel. in identifing
external causes of machine failures.
1. Ensure the system environment
meets printed specifications for
the Displaywriter and its
supplies. The physical environ-
mental limits are:
•
•
•
•
15.6°C to 32.ZoC (60°F to
90°F)
15.6°C to 29.4°C
85°F) (with the
attachment)
(60°F to
sheet-feed
8% to 80% relative humidity
30% to 65% relative humidity
(with the sheet-feed attach-
ment)
2. Using a ground indicator or CE
multimeter, verify the AC outlet
is wired correctly. This does not
verify a good earth ground.
3.
Verify the AC input voltage at the
wall outlet is in the following
specifications:
4.
US/Canada
WT
WT
104 - 127 VAC
90 - 137 VAC
180 ... 254 VAC
Note: A dedicated line is recom-
mended if the communication fea-
ture is attached.
If Radio
(RFI) is
procedure:
Frequency
suspected,
Interference
follow this
•
•
Use the IBM triplett VOM P /N
9900167.
Select the lowest AC voltage
setting.
•
•
•
•
With both test lead$ plugged
into the multimeter, extend
the two probe ends. intQ the'
air near the system.
Spread both leads as far apart
as possible.
Move the leads around to simu~
late a receiving antenna. A
strong RFI signal will cause a
meter needle deflection.
Floor covering and/or humidity
may cause Electros't;.atic Dis-
charge (ESD) problems. Floor
covering material can contrib-
ute to the buildup of high
static electrical charges.
This problem is more seVere as
room humidity decreases.
Questions
1. Are the system vents clear,
and
is
there enough space arqund the sys-
tem modules to permit cooling?
2. Is the system near one of the fol-
lowing:
3.
•
•
Radio/television
transmission antenna
Airport
• Microwave station
•
Radar installation
•
X-ray equipment.
station
Does any other equipment at the
customer location have intermit-
tent problems?
4. When other equipment is turned on
or operated, does the intermittent
failure occur?
10-16 IBM Displaywriter Product Support Mc;mual