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M
od el 5383 Α
M
ai nte n a n ce
5-16 . I N STRUME N T ACCESS
5-17 .
M
ost mainte nance op eratio n s require that the top an d bottom covers
b
e
r
emoved
f
rom
th e cou n te r . R emove t he covers acco rdi n g to t h e following procedure :
α .
b .
ι .
2 .
3 .
5-18 . T RO UBLESH OOTING
W
ARN I NG
DISCONN ECT ΤΗΕ AC POWER CO R D FRO M ΤΗΕ COU NTER
PRIOR TO REMO V I NG ΤΗΕ COVERS . E XP OS ED TERM I N ALS
W
IT HI N ΤΗΕ CO UN TER (INCLUDI NG SE VERA L POINTS ΟΝ ΤΗΕ
PRI NT E D CIRCU IT BOA RD)
H
AVE V O LTAG E S PRES ENT WH IC H
A
RE SUFF ICI ENT TO CA US E
I
NJURY O R
D
EATH .
P ositio n th e inst r ume n t
u
pside
d
own an d remove the fo ur flat
h
ea d sc rews fr om th e
bottom of the inst ru me n t.
L
ift t he bottom cove r
f
rom t h e instru me n t, t hen
r
emove t h e pr inted ci rc u it
b
oa rd (wit h
t
h e f ront a nd rea r p a n els attach ed ) by
p
ulli ng th e boa rd s st raig h t ou t of t he top cove r .
R eassem b le i n reve rse o rde r of
d
isassembly . Wh ile mati n g t h e top a n d bottom cove rs,
MAKE S URE th at :
Th e sta nd off s pace rs (attac he d to t h e top cove r ) a r e pr ope r ly in se rted
i
nto co rre-
spo nd i ng
h
oles on t he
M
ain B oa rd Assembly a nd th e
b
ottom cove r .
W
i r es on t he
M
ai n B oa rd Assembly a re clea r of t he sta nd off space r s and the
M
ain
B
oa rd Assembly
h
oles .
T h e fr o nt an d
r
ear pa n els a r e p r ope rly i n se rte d
i
n to t he g r ooves of th e top and
bottom cove rs .
CA
U
TIO
N
F ailu re to comply with items 1, 2, and 3 may
r
esu lt in damage to
the
M
ai n Board Assembly.
d .
I n sert a nd tig h ten th e fo ur flat
h
ea d scr ews at t h e bottom of t h e co un te r.
5-19 .
If t h e in st ru men t fails P erforma n ce Test on e on Table 5-1 (i .e ., t h e Dis p lay Test) per fo rm
th e ch ec ks listed on th e t r ou bles hootin g flowch a r t,
F
ig ure 5-1 .
If t he inst ru me n t fails
Performa n ce Test Two, refer to t h e tr o ub les h ooting flowc h a rt in
F
igu r e 5-2 .
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