Wavetek 143 Instruction Manual page 31

TOR MATCHES LIN NO
<
VOLTAGE (PC BO
"-------<~
UNDER FUSE)
YES
•BEFORE MAKING THIS MEASUREMENT, REMOVE ANY
CONNECTION~
BETWEEN THIS INSTRUMENT AND ANY OTHERS WHICH USE EARTr
COMMON
CORRECT IT
YES
RE'LACE FUSE
/"...
./'-...
A SHORT IS
ACROSS LINE OR> NO AN OPEN CIRCUIT YES
TO EARTH AT
>--~
..
~<IS BETWEEN C I R C U I T ' > - - - - - - - - - '
COMMON• EARTH•
LINE CONNECTOR
?
YES
CHECK TRANS-
FORMER
&
PRI-
MARY WIRING,
POWER SWITCH
GENERATOR BOARD
LOADING SUPPLIES
DOWN; LABELED
JUMPERS PROVIDED
TO AID IN TROUBLE-
SHOOTING
BLUE SECONDARY,
Cl, C4, CR3, CR4 & 04
NO
CHECK TRANSFORM-
ER SECONDARY &
WIRING, INSULATORS
UNDER REGULATORS
&
PASS TRANSISTORS,
PINCHED CHASSIS WIR-
ING, SHORT BETWEEN
J1 & RECEPTACLE
SHIELD
ICl, 03, 04,
07 & 08 CIRCUITS
CHECK
IC1,01,02,
05 & 06 CIRCUITS
Figure 6-6. Power Supply Checks. Trig/Pulse Board (Page 1 of 2)
6-8