Wavetek 143 - Page 38

REGULATED POWER
SUPPLIES
COMMON
VOLTAGE SELEC-
ТОН MATCHES LIN
VOLTAGE (PC BD
UNDER FUSE)
2
YES
CORRECT IT
YES
REPLACE FUSE
ус 25
A SHORT IS
AN OPEN CIRCUIT
YES NO YES
Rudy и —— «IS BETWEEN CIRCUIT
COMMON & EARTH*
LINE CONNECTOR 5
мо
pee
CHECK TRANS- CHECK TRANSFORM-
REMOVE P1 FROM
FORMER & PRI- ER SECONDARY &
J1 ON GENERATOR
MARY
BOARD
ARY
WIRING,
WIRING,
INSULATORS
POWER SWITCH UNDER REGULATORS
& PASS TRANSISTORS,
PINCHED CHASSIS WIR-
ING, SHORT BETWEEN
J1 & RECEPTACLE
SHIELD
GENERATOR BOARD
LOADING SUPPLIES
os ES DOWN; LABELED
à JUMPERS PROVIDED
; TO AID IN TROUBLE-
YES SHOOTING
REPLACE P1
+15V
NO
Гә
у
IC1,
Q1,
02,
BAD Q5 & Q6 CIRCUITS
?
YES
> +17 Мас
АТ + END
OF C1
?
YES
NO
CHECK
ІСІ, ОЗ, 04,
Q7 & ОВ CIRCUITS
CHECK CHECK
BLUE SECONDARY, BLUE SECONDARY,
1,C2,CR1,CR2 8 02 СЗ, C4, САЗ, CR4 & O4
Figure 6-6. Power Supply Checks, Trig/Pulse Board (Page 1 of 2)
6-8
*BEFORE MAKING THIS MEASUREMENT, REMOVE ANY CONNECTIONS
BETWEEN THIS INSTRUMENT AND ANY OTHERS WHICH USE EARTH
CHECK