IBM iSeries 270 Service Manual page 259

Possible failing
component FRU name
Tape unit Tape unit
Air moving device AMD
(AMD)
Power supply Power supply
Control panel Control panel
Processor Processor
regulator regulator
Device board Device board
Time of day Time of day
battery battery
HSL cables HSL cables
Memory configuration
A single main storage DIMM feature is allowed on all Models 800 and 810 (except processor features
7428 and 7430).
When the total number of main storage DIMMs is increased greater than one, the single existing DIMM
must be paired up (with a DIMM of the same capacity) and any additional DIMMs must be added in pairs
of the same capacity. Memory pairs are to be in the following order: A/B, C/D, E/F, G/H.
There are 8 memory DIMM slots available in the base system for main storage DIMMs which plug directly
onto the backplane.
Figure 3. Models 800 and 810 System Unit Expansion
Type or CCIN
number (see the
Type, model, and
Position part number list)
D08 See the Type,
model, and part
number list
B01, B02 See Final
assembly —
Models 270, 800,
and 810
P01 See Final
assembly -
Models 270, 800,
and 810
NB1 247D (See page
523)
R01 04N4276
DB1 283E (See page
526)
(non-concurrent),
28CD (See page
528) (concurrent)
MB1
Attached to active
HSL ports
Remove and
replace Additional
procedure comments
Go to Models
270, 800, and 810
- Removable
media - D07 and
D08
Go to Models
270, 800, and 810
- Air moving
device (AMD)
B01; B02
Go to Models
270, 800, and 810
- Power supply -
P01
Go to Models
270, 800, and 810
- Control panel -
NB1
Go to Models
270, 800, and 810
- Processor
regulator - R01
Go to Models
270, 800, and 810
- Device board
Go to Models
270, 800, and 810
- Time of day
battery
Go to HSL cables
- concurrent
Analyze hardware problems
247