HP 435B - Page 64

M o d e l 435 Β

Manual C
h
a
n
ges
C H A N G E Α (cont' d )
Se rvi ce Sh eet 2 (sc h e m at i c) (co n t' d ) :
Add
t
h
e f o ll o win g ca p ac i to rs on t h e Α 4
A
sse
mbly (r i gh t s id e of sc h e m at i c) :
C34 100
pF b et
w
ee n t h e dr a in
(D)
a nd so
ur
ce
(S) o f Q7 .
C35 100 pF fr o m t h e so urce (S) of Q7 to g
r
o
und 2 ( δ ) .
C40 0 .01 μ F fr o m pin
8
of
U
4 A
to
g r o und 1 (

) .
C41
0 .01
μ F fr
o
m pin
4 of U 4
A
to g
r
o und
1 (

) .
C49 100 pF b et w ee n pin s 2 a nd 3 of U 4 A .
Se
rvi
ce S
h
eet 3 (sc
h
e
m
at
i
c) :
Add t h e f o ll o win g
ca p ac
i
to
r
s on t
h
e
Α 4 A sse mbly (ce n te r o f sc h e m at i c) :
C37 100 pF b etwee n pin s 2 a nd 3 of
U
5 .
C46 0 .01 μ F fr o m pin 7 o f
U
5 to g r o und .
C47 0 .01 μ F fr o m pin 4 o f U 5 to g r o und .
CHANGE B
P
age 1-3, pa
r
ag
r
a ph 1-6 :
C
h
a
n
ge t
h
e
d
esc
rip
t
i
o
n
f o
r
O p t
i
on 003 to t
h
e
f
o
ll o win g : αr ea r pan e l inpu t co nn ecto rre pl aces t h e sta nd a rd
fr
o
n t p
a
n
e
l inpu
t co
nn
ecto
r ; Α r
ea
r p
a
n
e
l P
O
WER REF O UTPUT co nn ecto r r e pl aces t h e sta nd ard fro n t
p a
n
e
l
co
nn
ecto
r .
P age 3-5,
Fi g
ur e 3-2 :
Th
e d escr
ip
t
i
o
n
o
f
t
h
e
P
o w e r Se n so r Inpu t s h o uld
r
ea
d
as
f o ll o w s :
O p
t i on 002 h
as α
r
ea
r p
a
n
e
l inpu
t co
nn
ecto
r wir
e
d in pa r a ll e l w i t h t h e fr o n t pa n e l inpu t co nn ecto r . In
O p
t i o n
003,
t hi s
co
nn
ecto
r r
e pl aces t
h
e
inpu
t
fr o n t pa n e l co nn ecto r .
T a bl e
6-2
:
A 4C R 1, 2 w
aso
ri g in a lly 1901-0895 . H o w e v er , t h e p a rt li ste d in t h e ta bl e i s t h e r eco mm e nd e d re pl ace m e n t .
Th er efor e, no m a nu a l c h a n ge i s s u ggeste d .
A 4 R 20 w as o ri g in a lly 0811-3218 . H o w e ve r , t h e p a rt li ste d in t h e ta bl e i s t h e r eco mm e nd e d re pl ace m e n t .
Th er efor e,
no
m a nu a l c h a
n ge
i s s u ggeste d .
Und er t h e d escr ip t i o n f or
W
1
a
dd
t
h
e
f o ll
o
win g :
O
mi tte d on O p t i o n 003 .
Se rvi ce Sh eet 2 (sc h e m at i c) :
To
t h e l e f t o f J 1 ( l eft s id e o f sc h e m at i c) a dd t h e f o ll o win g : (O mi t J 1 a nd W 1 on O p t i o n 003 o nly) .