IBM 2681 Hardware Maintenance Manual - Page 149

Parts

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Parts list v Each FRU is available for all types or model, unless specific types or models are specified. v A CRU (Customer Replaceable Units) is identified by a single asterisk (*) or two asterisks (**) in the CRU ID column. An N in the CRU ID column means that the part is not a CRU. A single asterisk (*) means that the part is a Tier 1 CRU; two asterisks (**) mean that the part is a Tier 2 CRU. Tier 1 CRU: (Example- Mouse, External Keyboard, and Hard-disk drive with coin screw) - NO TOOLS ARE REQUIRED. - A coin or a thumb screw is acceptable. - Minimal technical expertise is required. - Minimal problem determination is required-less than 5 minutes. Tier 2 CRU: (Example- Adapter card, ThinkPad memory) - Up to 4 screws or fasteners have to be removed. - Some technical experience is required. - HelpCenter assistance may be used. - Problem determination can be done by customer, either on site or with HelpCenter assistance. (continued) ThinkPad R40 145

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v
Each
FRU
is
available
for
all
types
or
model,
unless
specific
types
or
models
are
specified.
v
A
CRU
(Customer
Replaceable
Units)
is
identified
by
a
single
asterisk
(*)
or
two
asterisks
(**)
in
the
CRU
ID
column.
An
N
in
the
CRU
ID
column
means
that
the
part
is
not
a
CRU.
A
single
asterisk
(*)
means
that
the
part
is
a
Tier
1
CRU;
two
asterisks
(**)
mean
that
the
part
is
a
Tier
2
CRU.
Tier
1
CRU:
(Example-
Mouse,
External
Keyboard,
and
Hard-disk
drive
with
coin
screw)
–
NO
TOOLS
ARE
REQUIRED.
–
A
coin
or
a
thumb
screw
is
acceptable.
–
Minimal
technical
expertise
is
required.
–
Minimal
problem
determination
is
required-less
than
5
minutes.
Tier
2
CRU:
(Example-
Adapter
card,
ThinkPad
memory)
–
Up
to
4
screws
or
fasteners
have
to
be
removed.
–
Some
technical
experience
is
required.
–
HelpCenter
assistance
may
be
used.
–
Problem
determination
can
be
done
by
customer,
either
on
site
or
with
HelpCenter
assistance.
(continued)
Parts
list
ThinkPad
R40
145