Wavetek 188 - Page 33

Table
6-11.
Sweep
Circuit
Indication: Sweep or Ramp
prooiems
Check
Corrective
Procedure
1.
Depress CONT (Sweep)
a U1.
Extend SWP/STOP.
b SW2
Check
E48
tor +4V
2.
Depress SWP/STOP
Check collector of 03
4V peak ramo
II ramp
amplitude is >4V peak.
U1.03
II ramp amplitude
is <4V peak
01.02
4. At SWP OUT check
for period
change
o!
approximately
30
ms
02.
R22
to
60s as the
TIME control is rotated
from lull ccw to
full
cw
5.
At SWP
OUT check lor ramp
period drift
C4.
6 At E39
with STOP control
lull
cw.
ramp amplitude
is
4V
peak, with
STOP R12.SW1, SW2
control lull ccw.
ramp amplitude is OV.