Tables; General Instructions - Wavetek 188 Instruction Manual

Opened capac itor can be a
2.
by using good capacitor connected
under
with the capac i tor
effect.
resu l ting
8.4 G EN ERAL INSTRUCTIONS
problem,
When encountering n
a
as many front p e
a
of the
retain t h e problem. The trouble­
settings and
Initial sti l l
in section generally begi n at these
shooting
this

tables

initial settings and
spec ify
the f ront panel
Preset controls
Control
Dial
Frequency
. . . . . . . .
POWER (Hzj , . . . . . .
F R EO M U LT
. . . . . . . . .
, . . . . .
FU NCTION . . .
.
. . .
AMPLITU DE
DC O F FSET .
. . . . .
. . . .
. . . . . .
. .
SWEEP , . . . . . . . . . . . . . . . . . . .
. . . . . . . .
.
. .
CAUTION
To prevent damage to com ponents, t u rn
u n it off whi l e remov i ng
components, connectors
The suspected
ma lfunctioni ng
settings Before
checked to eli minate the
double
or connecti ons.
the unit should be checked for pr op er line (refer to
tion ,
voltage selection
of the boards and c hassis wires for
s pection
often
saves
or overheati ng
Indica tion: Fuse blown,
Set a l l controls in the i r
1 .
2. Ensu re line voltage matches instrument configu ration
Check fuse.
( + )
Check C1 and C2
3.
6-2
located ( not always)
but
test
i n parallel
observing the
and
l to retu rn
i t is advisable
as possible to
con t rols the i r
all subseq uent setups.
as
follows.
Position
4.0
. . . . . . . . . . . . . . . . . . .
' , . . . . . . . . . . , . . . . ON
. . . . . . . . . . . . . . . . . . . 1
. . '"
. . . . .
. . , . . . . . . . . . . OFF
. . . . . . . . .
. .
.
. , . . . . . . . . . . . . . MAX
. . . .
.
CO NT, STOP, L I N
. .
replac i ng
or
pc boards.
or
be
po.ssI blll ty of improper
condi tion should
attempting isola­
fau lt
2).
visual i n ­
Section A
good
damage
much ti me.
Table 8-2. Power Supplle. and Generator LOOp
power indica tion
no
Check
(refer to paragraph 6.4).
initial positions
( for
20
±
to 26V unregulated
- )
ArtekMedia
by
Scans
Once the
malfunction
procedu re by
selecti ng an
best
wh ich describes
the referenced troubleshooti ng table.
Fol low through the checks
using schematics and
positive are not obtained, perform the in­
results
dicated corrective procedu re.
Table 8-1 .
Incllcatlon
1 .
Fuse blown,
outputs .
2. Func tion
ou tputs
when TTL sync OK.
K
3. Sine waveform problem.
4. waveform
Square
5. TTL sync outpu t
6. Generato r frequency does not respond
to dial and VCG input.
correctly
7. Waveform symmetry
8. Problem bottom three ranges
on
9. Generator
trigger
lem.
Sweep problem.
10.
outputs.
or no
(refer 2).
to Section
dc .
2011
=>
defined,
is begin the isolation
indication in
the proceed
table
malfunction and
the
in
troubleshooting table,
as a guide. When
assembl ies
Faul� I.olallon
no indication or no
power
misSing or clipped
problem.
Triang le
problem.
problem .
problem.
only.
and gate mode
prob-
Correctl,e Procedure
Rep l ace fuse; check for nor­
,mal
operation .
CRl CR4.
a.
b. Cl , C2.
-
SW1 .
F1 (bracket
c.
sembly).
d. Tl , RV1 ,
6-1
to
Table
6-2
6-3
6-5
6-7
6-8
6-9
6-1 0
6-1 1
as­