Wavetek 143 - Page 34

PLACE ALL CON-
TROLS IN INITIAL*
POSITIONS
VCG CHECK
REMOVE ANY
INPUTS TO
VCG IN BNC
*15Vdc TO APPROX
+150
mVdc
EA
AS
CHECK
DIAL
IS
ROTATED
DIAL
&
ЕЗ
- ES
FROM
2.0
TO
.02
WIRING
?
NS
0
Уас
+5
mV
AT
IC1-2
AS
DIAL
CHECK
IS ROTATED**
?
Pi
—5 TO ~0 Vdc
AT IC1 -6 AS DIAL
< ISROTATED
FROM 2.0 TO .02
?
YES
CHECK
+10 TO +14.95 Vdc
AT IC4-3ASDIAL IS
ROTATED FROM
2.0 TO .02
?
YES
CHECK
CIRCUITS
—10 TO —14.95 Vdc
АТ 1С5-3 AS DIAL IS.
ROTATED FROM
2.0 TO .02
2
YES
+10 TO+14.95 Vde
ATEMITTERO4AS NO
< DIAL IS ROTATED
FROM 2.0 TO .02
CHECK
CIRCUITS
IC1 CIRCUIT
IC1 CIRCUIT
ІС2, 01 & 02
Ca, Q3 & 04
?
YES
—10 TO —14.95 Vdc
AT EMITTER Q6 AS NO
DIAL IS ROTATED
FROM 2.0 TO .02
?
N
CHECK
CR6 - CRO & CR26
INTEGRATOR
CIRCUITS
YES
CHECK
CIRCUITS
*sYMMETRY ΤΟ OFF, 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
6-4
1С5, 05 & 06