IBM 270, Service Manual

Page: 265 / 622

Position FRU name
Possible failing
component
Type, CCIN, or part number
(use the Type, model, and
part number list to
determine the part number
when the type or CCIN are
given.)
Remove and replace/recovery
procedure
M02 Memory riser
card
Memory riser card 2884 (See page 527) or
memory riser filler card 263D
(See page 524)
Go to Model 820 - Memory.
M02
daughter
cards
Memory DIMM See Figure 1.
2884 memory card
(See page 364) in
the Memory
locations and
placement rules
topic.
3002 (See page 528), 3004,
3005, 3006, 3007, 3009 (See
page 528)
Go to Model 820 - Memory.
M03 Processor card
and regulator
Processor
v
Network
Interface
Controller
v 244A (See page 522)
(1-way)
v
24A0 (See page 523)
(1-way)
v
25BC (See page 523)
(1-way)
v 244D (See page 522)
(2-way)
v
25BD (See page 523)
(2-way)
v 244E (See page 522)
(4-way)
v
25BE (See page 523)
(4-way)
Go to Model 820 - Processor -
M03.
M03
daughter
card
Processor
regulator
Processor
regulator
v
04N4276
.
Go to Model 820 - Processor
regulator - M03.
M03
daughter
cards
Memory DIMM See Figure 2.
Processor card
with DIMM
memory (See
page 364) in the
Memory locations
and placement
rules page.
3002 (See page 528), 3004,
3005, 3006, 3007, 3009 (See
page 528)
Go to Model 820 - Memory.
Time of
day
TOD TOD 16G8095 Go to Model 820 - Time of day
(TOD) battery.
HSL
cables on
the HSL
ports
HSL cable HSL connection See the Type, model, and part
number list.
Go to HSL cables - concurrent.
Figure 2. Dual line cord drawing for Model 820 system
Analyze hardware problems
253