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M
odel 435 Β
Operation
3-9.
O
PER
ATO
R
'S
M
AI
N
T
EN
A
N
C
E
The only maintenance respon s ibili t i es t h e ope r a-
tor should normally perform a r e prim a ry pow e r
fuse replacement, LINE
s
witch lamp replacement
and rechargeable battery replacement.
Batte ry replacement is the only operation that
requires tools. Α Pozidriv screwdriver is needed to
remove the battery
c
lamp.
3-10.
F
uses
t h e P o w e r M ete r LINE
s
witch is ON and is
b
eing
op e rated by the available line power, the
l
amp
s
hould be illuminated. If the
l
amp is defective,
remove the lens by pullin g
i
t straight out. Order
l amp (3131-0434) CD6 a nd repl ace th e old
pushbutton-lamp assembly with the new
o
ne. To
replace the assembly , align the pins with the
notch in the receptacle and push straight in.
3-12 . Battery
R
eplacement
Th e prim a ry p o w e r fuse is
f
ound within the Α 6
If the meter indicates that the batte ry is dis-
P o w e r Modul e A ssembly on the P owe r M ete r 's
charged by α full downscale reading, and after
r ea r panel. For instru ct io ns on how to cha n ge t h e
charging the battery still will only power the
fuse, refer to the par ag r aph e n t i tled Lin e Vo l tage
P
ower Meter for α
s
hort
p
eriod of time, the batte ry
Selection in Section II.
is probably defective. The replacement batte ry,
ΒΤ1 (HP
p
art number 1420-0096), may be ord ered
CA
U
TIO
N
through the nearest Hewlett-Pac kard office . Refer
to Battery In stallation in Section II.
M
ake s ure that only
f
uses with
t
he
r
equired rated cu rren t a nd of t he speci-
fied
t
ype (slow b low, t ime delay, etc .) a r e
WARNING
u
sed for replacem e nt. T he
u
se of
r
e-
paire d
f
uses a nd
t
h e sh o r t-c ircuiting of
Thi s tas k
s
hould be performed
o
nly by
f
use-holders must be avoided.
service tr ain ed persons w ho are awa re
3-11 .
L
amp
R
eplacement
of th epotential shock h aza rdof wo rking
on an
inst rume nt w ithp rotecti ve co ve rs
The lamp is contained in α plastic
l
ens which dou-
removed.
bles
f
or α pushbutton on the LINE
s
witch. When
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