Wavetek 145 Instruction Manual page 43

GENERATOR LOOP
PLACE ALL CON-
TROLS IN INITIAL"
POSITIONS
YES
<
P1-9 +24 Vdc
?1-8 -24 Vdc
P1-7 -15 Vdc
P1
.f;
+15 Vdr:
> N O
NO
<
APPROX +10 Vdc
NO
AT 04 & -10 Vdc
>
AT 06 EMITTERS
YES
;:;
VOLTAGE AT
WIPER SW1-F NO
(GN WIRE) THE
.......
/
<
SAME AS AT TP2
7
YYES
APPROX 2 Vdr:
AT COLLECTOR
NO
<
015 & OPPOSITE
/
l~J POLARITY TO
THAT AT TP2
7
l_YES
VOLTAGE AT
. . . 8
CHECK
...
TRIANGLE AMPL
08- 012 CIRCUIT
CHECK
HYSTERESIS
..
SWITCH IC9 &
015 - 017 CIRCUIT
EMITTERS 013 & 014 NO CHECK
<
THE SAME AS AT _,,>-------------1•~ IN rtGRATOR 013
COLLECTOR 015 & 014 CIRCUITS
?
8i
DIODES CR6 - CR9
.......,,,
*NORMAL/DOUBLE/DELAY SWITCH
·rn
NORMAL, FREQ VERNIER TO CAL, CR26
DIAL TO 2.0, ALL OTHERS TO 1'.2 O'CLOCK
**A NEGATIVE VOLTAGE HERE STOPS GENERATOR FOR TRIGGERED
OPERATION
***USE SCOPE AND HIGH IMPEDANCE PROBE
Figure 6-2. Generator Loop Checks, Generator Board
6-7