11·2
Product
History
Portable
PLUS
Computer
11.2
Backdating History
The following list provides detailed information about each backdating item. (Also, the indicated ser-
vice notes describe the backdating items.) Refer to table 11-1 to find the items that apply to a
particular unit.
1.
HP
45711 AlB, serial numbers before
2532A-----.
Install a terminal shield (part number
82985-80011) in the battery compartment. This shield prevents the customer from shorting the
battery terminals while installing an
HP 82985A Video Interface. (Service Note 45711-04.)
2.
HP
45711 AlB, serial numbers before
2533A-----.
Install a rubber foot (part
number
00090-
80022)
over each of the two
ESD
springs inside the bottom case.
Be
sure the hole
in
each spring
lines
up
with its hole in the bottom case,
and
that the foot lines
up
with the edge
of
the recessed
area of the case. (See figure 11-1.) This prevents shorting the motherboard
PCA to the spring
while drawers are installed. (Service Note
45711·05.)
Figure
11·1.
Installing Feet Over Springs
3.
HP
45711A/B, serial numbers before
2537A-----.
If
a customer notes a problem with battery
recharging, replace resistors A2R54, A2R55,
and
A2R57 on the motherboard PCA. (Refer to table
9-5.)
If
you replace
anyone
of these resistors,
you
must
replace
all
three-early
units used a differ-
ent
combination of resistors.
Recommend to the customer to leave the unit charging whenever possible. This gives maximum
battery capacity
when
the recharger's not connected. The battery can't overcharge. (Service Note
45711-07.)
4.
HP
45711A/B, serial numbers before
2603A-----.
The ROM ICs on the memory PCA are
in-
stalled in sockets (part number 1200-0567),
and
you can replace the ICs during assembly-level
repair. Refer to table 11-2 for IC identification.
Replacement memory
PCAs will contain
soldered
ROM ICs.
5.
HP
45711
AlB, serial numbers before
2609A-----.
The front
and
back of the display assembly
don't
have molded bumps at the hinges to center the assembly in the top case. Instead, a felt
pad
(part number 0330-0392) should be present on each leg of the display assembly.
If
you replace either the front or back
of
the display assembly, you should replace
both
parts
(listed in table 9-3).
To Next Page
Loading...
