HP 8110A Service Manual page 189

150 mhz pulse generator
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HP 811 OA Se
r
vice Guide
R
e
p
laci
n
g or
R
efitti
n
g t
h
e
F
ront
P
a
n
el S
ub
asse
mb
lies
How to
F
it
P
C
B
oar
d
s i
n
to
P
lastic Su p
p
o
r
t Cli
p
s
Caution
D o n ot u se excess ive
p
ressu re on P C
b
oard s upp ort clip s, as they
0
m
ay b ecom e dam aged .
P
oi
n
ts to O
b
se
r
ve w
h
e
n R
efitti
n
g o
r R
e
p
lacing Front
P
a
n
el S
ub
asse
mb
lies
5-2 4
Disassem
b
ly and
R
eassembly
In ge n eral, this i s t h e reverse of re moving, but wh ere re pl ac ing or
refitting d i ffers in
a
ny way, it is noted in thi s section
1 .
L
ocate o n e s id e o f the PC
b
oard in its s upp ort clip s
2 .
P
ress on e end o f the
b
oard steadily down on its clip s while
m
oving
t h e clips
b
ack from the b oard
j
ust e nough to allow t he board to
'click ' into
p
os i tio n
3 .
R
ep eat step 2 for t he other s ide, and the remaining e nd of the
b
oard
1 . Dis play module
α . If you are replacin g the Di spl ay module, remove t he
p
rotective
film from the d i splay
b .
U
s in g α dry, cl ean
c
loth , gent ly
c
lean the s urface o f the dis pl ay
2 . RP G H ead uni t
α.
F
o l d th e Ribbon cable in α concertina above t he uni t to use up
th e extra lengt h , before fitt ing the RP G
m
od ule. Allow
j
ust
suffic ient cable s howing at the top
o
f the uni t to connect t idily
wi t h J 3 on t h e RP G
m
odule, whi ch then fits o v er the H ead
uni t,
h
oldin g th e
f
ol ded cable in positi on
b . Secure th e uni t to t he
F
ront
P
anel frame using t he 12mm nu t
an d washer.
T
ake care
n
ot to o ver-t ig hte n the 12mm nut, as
th e
m
o unt ing bus h may be damaged
c .
P
ress th e kn ob firmly
o
nto the spindle,
m
aking sure that t he
flat on the spin dle is a ligned wi t h the correspon ding flat ins ide
th e knob
d .
R
otate t he kno b to c h eck that it runs smoothly
3 . RP G
m
odule
α. En s ure t h at th e LED s are correct ly p ositioned above their
ap ertures . If not,
m
o v e slightly wit h α screw driver or other
sui tabl e tool unt il the
p
ositio nin g is correct
4 .
L
arge and s mall Key pads
α . If y ou are repl acing on e or
b
ot h Ke y pads,
y
o u will see that the
Ke y p ad kit No : 08110-67501 contains
b
ot h keypads, attached
togeth er as one pi ece . Separate the sm all pad
f
rom the
l
arge
o n e by ge ntly tearing t he t w o sect ions apart

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