Tektronix 2213 - Page 210

NT A ND
Υ
R A I SE ΤΗΕ
T
RANSFORMER
VOLTAGE .
NOT E XCEED
I NPUT)
Y ES /
τυυ r οτεο

YES
Ι
ΝΟ
Y ES
T ROUBLESHOOT SECONDARY P OWER
S UPPL I ES F OR EXCESS I VE LOAD I NG
ON ΤΗΕ PR I MARY C I RCU I T .
C HECK Q940 AND Q942 F OR OPEN
SU S PECT E XC E SS I VE
P O WER S UPPL Y L OAD
I
N
G .
S EE P O WER SUPPL Y
I SO L AT I ON PR OC ED URE
AD J ACENT
TO
P
OWER
D I STRIBUT I ON DI AGRAM
T URN O FF POWER
TO
I NSTRUMENT AND REMOVE
S HORT FROM U931 P
I NS 1 δ 2 .
REAPPLY P OWER A ND I NCREASE
AC- I NPUT TO 115V RMS
CHECK Q94 θ AND Q942
COLLECTOR VOLTAGE W I TH
RESPECT
TO
ΤΡ
934 F OR
HEADROOMVOLTAGE
REPL AC E DEFE CT I VE
CO MP O NEN TS A N
D C HE C K
PO WER SUPPL Y O PER AT I ON
P OW
ER S UPPL Y
RECT I F I ER AN
D
F
I L
T
ER
COMPONENTS OK?
Y
ES
ΝΟ
I S V
OLTAGE
D ROP ACROSS R 941
AT LEAST θ .4V?
ΝΟ
A RE
A
LL S ECONDARY
V OLTAGES WITHIN
TOLERANCE?
I S
HEADROOM
VOLTAGE AT LEAST
3
.SV?
YES
ΝΟ
Y ES
ΝΟ
PRERE
G UL ATO R AND
I
NVER T
ER
T
R O UBLE S H OOT I N G
3826-45 Α
2213 Service
< m
τ
m m
λ m
4 ο
mC
T ROUBLESHOOT F AULTY
P OWER S UPPLY FOR OPEN
οο
I NSTRUMENT
OR S HORTED
COMPONENTS . c~
WER SOURCE
C HECK X FMR W I ND I NG
φ D
m
Z
AN
AUTO
Ησ
τ
O RMER A ND
ό
ISOLAT I ON
DO
O RMER
P OWER
Y ES -,000'
S ECONDARY
-N `~ ΝΟ
z
NOTE 1 ) .
S UPPLY
V
OLTAGES REMA I N
C HECK
ο
P OWER TO ΤΗΕ
OK
,IN TOLERANCE?
U 931