Wavetek 143 Instruction Manual page 29

PLACE GENERATOR
MODE TO GATE
GENERATOR MODE CHECK
1-----~--- (NO TRIG IN INPUT!
& ALL OTHER CON·
TROLS IN INITIAL'
POSITIONS
~
SET TRIG LEVEL
FROM CCW TO CW
<OF CENTER; IC3-1
GOES FROM HIGH
TO.LOW ?
rYES
IC3-8 GOES
FROM HIGH TO LOW
NO
~!;:~~~~~~L~~
>
MAN TRIG'' IS
DEPRESSED
?
YES
NO
No
CHECK
TRIG SQUARER
CIRCUIT
CHECK
SWl-B
CHECK
NO
.,..._v_E_s _ _ _ _ _ _ _ SYNC AMPL ON GEN·
YES
IC2-8 GOES
FROM HIGH TO LOW No CHECK
<
WHENMANTRIG >--------..-1C2&TRIGAMPLON
DEPRESSED GENERATOR BOARD
CONTINUED
REMOVE
Pl TO
ISOLATE PROBLEM
NO
'SYMMETRY TO OFF. FREQ VERNIER TO CAL. DIAL TO 2.0. ALL OTHERS TO 12 O'CLOCK
••RETURN TRIG LEVEL CCW TO OPERATE MANUAL TRIGGER
Figure 6-5. Trigger and Gate Mode Checks, Trig/Pulse Board (Page 1 of 2)
6-6
ERATOR BOARD
Pl-1
WIRING
CHECK
IC2 & SW1-B