Wavetek 143 Instruction Manual page 26

GENERATOR LOOP
YES
2
APPROX +10 Vdc
NO
"V
<
AT04&-10Vdc)
AT 06 EMITTERS
'£es
VOLTAGE AT
CHECK
WIPERSW1·F
NO
<
(GN WIRE) THE
TRIANGLE AMPL
SAMEASATTP2
08 • 012 CIRCUIT
?
YYES
APPROX 2 Vdc
CHECK
ATCOLLECTOR -... NO
....
HYSTERESIS
<
Ql5 & OPPOSITE ,,
SWITCH IC9&
IN POLARITY TO
015 • 017 CIRCUIT
THATATTP2?
l.YES
VOLTAGE AT
EMITTERS 013 & 014, NO
CHECK
<
THESAMEASAT _,
..
INTEGRATOR 013
COLLECTOR 015
& 014 CIRCUITS
-.!.-
8i DIODES CR6 • CR9
CR26
"SYMMETRY TO OFF, FREQ VERNIER TO CAL, DIAL TO 2.0, ALL OTHERS TO
12 O'CLOCK
.. A NEGATIVE VOLTAGE HERE STOPS GENERATOR FOR TRIGGERED OPERATION
... USE SCOPE ANO HIGH IMPEDANCE PROBE
Figure 6-2. Generator
l.Oop
Checks, Generetor Board
6·3