Tektronix 2467B - Page 471

Power Supply Voltage Tolerances
Power Supply
+10 V
+87 V
+42.4 V
+15V
Digital +5 V
Analog +5 V
-5 V
-8V
-15 V
Test Point (+ Lead)
J119-4
J119-8
J119-9
J119-6
J119-2
J119-12
J119-5
J119-11
Jl 19-1
Reading
+9.99 to+10.01
+85.26 to +88.74
+41.55 to+43.25
+14.775 to+15.225
+4.85 to +5.15
+4.925 to+5.075
-4.965 to-5.035
-7.88 to-8.12
-14.775 to-15.225
2465B/2467B Service
POWER SUPPLY TROUBLESHOOTING PROCEDURE
NO CHECK REGULATOR
+■ OUTPUTS ACCORDING
TO TABLE AT LEFT
OUTPUT LEVELS?
ALL 0V
SOME ACTIVE
REFER TO THE
REGULATOR
PROCEDURE
5°
2*
c m
m JJ
r-
m in
tpc
OTJ
PC
YES
WITH POWER
OFF , REMOVE
COMB P231
YES
REPLACE
THERMAL CUTOUT
SWITCH (S1020)
CHECK FOR
OPEN LINE CORD,
POWER SWITCH,
LINE FILTER, OR
RECTIFIER (CR1011 )
YES
REFER TO THE
INVERTER
PROCEDURE
YES
DETERMINE CAUSE
OF OVERHEATING
GO TCP
11
REPLACE FUSE
ANO TURN POWER
BACK ON
SET SWITCH (S90)
TO MATCH THE
LINE VOLTAGE
WITH POWER
OFF , REINSTALL
COMB P23I
REPLACE
THE FUSE
YES
CHECK CR1011 , SPARK
GAP ARRESTORS, ANO
OESCRETE FILTER
COMPONENTS FOR SHORTS
CHECK
C102I , C1022
CR1050, Q1030
Q1050, Q1060
Q1070, CR1072
C1072, ANO
WINDINGS OF
T1020 AND T1050
WITH POWER
OFF, REINSTALL
COMB P2S1
6019-36