Wavetek 143 Instruction Manual page 30

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TRIG/PULSE BOARD
GENERATOR BOARD
MAN TRIG IS
DEPRESSED
BASE OF 027 GOES
,.FROM HIGH TO LOW
<..._
WHEN MAN TRIG
IS DEPRESSED
X E S
GENERATOR RUNSO LY
<WHEN MAN TRIG
IS DEPRESSED
~ ~s
C71 CR18 - CR26 TRIGGERS OK; <
OlJ, 024, 026
&'~O_,,.TRIG
WAVEFORM>
TRIG AMPL OK
~CORRECT
& BASE-
LINE BAD
CHECK
R2, CR26• & TRI
COMPENSATION
CIRCUIT IC6 & 07
*MATCHED DIODE PAIR
't~1
AES
START/STOP
0°CAL>10omv
BETWEEN 2.0 &
.O~
ON DIAL
J:o
START/STOP
,,£0NTROL DOESN'T->
'-...woR K PROPERLY
CHECK
CONTROL
CHECK
C28, IC2, IC3
SWl-A & SWl-B
CHECK
Pl-4 WIRING
GENERATOR
DOES NOT
RUN
Figure 6-5. Trigger and Gate Mode Checks, Trig/Pulse Board (Page 2 of 2)
GOTO
CONT MODE
6·7