Wavetek 145 Instruction Manual page 44

VCG CHECK
PLACE ALL CON-
f--------__.~TROLS
IN INITIAL"
POSITIONS
REMOVE ANY
INPUTS TO
VCG IN BNC
+15VdcTO APPROX
+150mVdcATE4AS NO <
DIAL IS ROTATED
>---------
FROM 2.0 TO .02
?
XYES
0 Vdc
±5
mV
<
AT IC1-2 AS DIAL>_N_o _ _ _ _ _ _
M
IS ROTATED
0
?
·I
XYES
-5
To~o
Vdc
<
ATIC1 -6ASDIAL) NO
IS ROTATED
>---------
,
FROM 2.0 TO .02
~YES
+10 TO +14.95 Vdc
AT IC4-3 AS DIAL IS NO
<
ROTATED FROM
'>---------
2.0 TO .02
?
x:ES
-10 T0-14.95 Vdc
AT IC5-3 AS DIAL IS NO
< ROTATED FROM
2.0 TO .02
iYEs
+10T0~5Vdc
AT EMITTER Q4 AS NO
<DIAL IS ROTATED
/>--------t~~
FROM 2.0 TO .02
?
~ES
CHECK -10T0-14.9!:iVdc
CR6 - CR9 & CR26
I...
YES AT EMITTER Q6 AS NO _..
INTEGRATOR
1"11....-t--------<
DIAL IS ROTATED
_,,>--------1--..~
CIRCUITS FROM 2.0 TO .02
?
~
"NORMAL/DOUBLE/DELAY SWITCH TO NORMAL, FREQ VERNIER TO CAL,
DIAL TO 2.0, ALL OTHERS TO 12 O'CLOCK
"*USE SCOPE AND HIGH IMPEDANCE PROBE FOR THIS AND SUBSEQUENT
VCG MEASUREMENTS
Figure 6-3. VCG Checks, Generator Board
6-8
CHECK
DIAL & E3 - E5
WIRING
CHECK
IC1 CIRCUIT
CHECK
IC1 CIRCUIT
CHECK
IC2, Q1 & Q2
CIRCUITS
CHECK
IC4,Q3 & Q4
CIRCUITS
CHECK
IC5,Q5 & Q6
CIRCUITS