Wavetek 145 Instruction Manual page 45

CHECK
IC2, IC3, SW1-A
&SW4
~
ATP1-3
PLACE GENERATOR
MODE TO GATE
(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
<
AS TRIG LEVEL IS>
> a - - - - - - - - - < OPERATED OR AS
MAN TRIG** IS
DEPRESSED ?
YES
GO TO CONT MODE .,._ _ _ _ _ _ _ _ <
NO
NO
CHECK
TRIG SQUARER
CIRCUIT
CHECK
SW1-B
CHECK
NO
~-Y_E_s _ _ _ _ _ -91SYNC AMPL ON GEN-
GO TO GATE MODE
IC2-8 GOES
FROM HIGH TO LOW NO CHECK
<
WHEN MAN TRIG > - - - - - - - - - IC2 & TRIG AMPL ON
DEPRESSED GENERATOR BOARD
GO TO TRIG MODE
CONTINUED
REMOVEP1TO
ISOLATE PROBLEM
--NORMAL/DOUBLE/DEL/\Y SWITCH TO NOl1MAL, FREQ VERNiER TO CAL,
DIAL TO 2.0, ALL OTHERS TO 12 O'CLOCK
**RETURN TRIG LEVEL CCWTO OPERATE MANUAL TRIGGER
NO
ERATOR BOARD
P1-1 WIRING
CHECK
IC2 & SW1-B
Figure 6-5. Trigger and Gate Mode Checks, Trig/Pulse Board (Page 1 of 2)
6-10