Fluke 8024B - Page 82

8024B
Table 4-6. Troubleshooting Guide (cont)
TEST AND SYMPTOM POSSIBLE CAUSE
PEAK HOLD TEST
Value does not appear in the display.
Value decays too fast.
LEVEL DETECTOR TEST
UP arrow doesn’t appear and audible
tone doesn’t sound when the input is
low.
Down arrow doesn’t appear and audible
tone doesn’t sound when the input is
low.
Down arrow appears, but tone doesn’t
sound when input is low.
CURRENT TEST
Input does not affect display.
Displayed reading is out of tolerance
on one or more ranges..
°CTEST
Display reading out of tolerance.
4-18
U19, (U14, Q10), C5, C6
U19, C19, U14, Q10
U21,
U17,
U16,
U10,
U9,
or
inter-
Sscedeetue
connect.
Q switch (S1E), U21, U17, U16
S8B, or interconnect, U10, U9,
LS1
U18 Q8
AC/DC switch (S8B), U10, Q8,
U18A, LS1
F1, F2, CR1, CR2
lf 2000 mA and 200 mA ranges
are OK, U2 is defective. Other-
wise, U3 is defective.
TEMP COMPENSATION (R10)
out of calibration. Room temp
should be displayed if °C input
and common are shorted to-
gether. Check also fuse and bat-
tery connector.