Racal Instruments 9901 Maintenance Manual page 70

PARTS
LIST:
DISPLAY
ASSEMBLY
19-0715
NOTE:
Componenfs
are prefixed
on the circuit
diagram
(Fig. 4).
Part
No.
Description
Rat
Tol
%
Value
Component
Reference
Resistors
W
_o
20-6627
Variable,
log.
20
IM
R1
20-2331 Carbon
Film
1
3
5
330
R2,
R3
20-2221 Carbon
Film
1
5
220
R4,
R5
Capacitor
V
F
21
-4528 Polyester
400
10
47n
Cl
21-1616
Ceramic
12
-20-teo
lOOn
C4
21-1708
Ceramic 50
20 lOOn
C2,
C3
Switches
23-4081 Slide switches:-
Aq/DC
ISl
B-B/B-A 1S2
Stop Slope
1S3
Start
Slope
1S4
Check/ Operate 1S5
Pulse/
Contact 1S6
Normal/
Hold
1S7
Indicators
*
Numerical
display.
LED, 7-segment D.1.2
to
D.I.;
26-5004
Indicators
LED:-
Overflow,
Gate
LP.l LP.2
Miscellaneous
25-6027
Flexible wiring,
33
way
*
SEVEN
SEGMENT
DIGITAL
INDICATORS
The 7-segment
indicators
normally
fitted
have been
the
Texas TIL312 with long pins
(Part
No.
26-1505).
This version
is
no
longer
manufactured
but will
be available from
Racal-Dana
Service
Department
for
an
indefinite
period.
It
can be recognised by
its
gold-coloured
pins.
Later production
will
be
fitted
with
the short pin
version of the TIL312
(Part
No.
26-1509)
which
can be recognised by
its
silver-coloured pins.
The two
types are electrically identical,
but
the
customer should specify the correct
Part
number
when
ordering
a replacement.
Parts
List
1
9901 Vol
.
2