Maintenance
—
DM 5010
If the output of U1417-2 is correct, disconnect the
RMS
board from
the
extender
board and remove the
ADC board.
On
the
extender board, measure the voltage between
pins
7B
and 8B. If the voltage is not between
33.3 and 41.7 V,
refer
to
the Isolated Supplies troubleshooting information.
Continue
with the
measurements in the table.
After
making the voltage measurements in Table 7-13,
check
the
components listed below for
the indicated
symptoms.
Table
7-13
POWER
SUPPLY AND REFERENCE VOLTAGES
Conditions
Measurement
Location
Limits
Components
200
Ω range,
0 Ω
input
U1417-2
22.8 to
25.2
See text
U1
120-4
-2.3 to -3.1
VR1415
VR1123-C
8.82 to
9.18
R1221,
VR1123,
Cl
111
U1
120-3
0.638 to 0.671
R1123,
R1121, CR1021, CR1121, U1120
P1711-8A
9.50
to 10.76
U1120,
CR1227,
RT1227, CR1225,
R1229, R1321,
R1225,
R1223,
K1313 and its drive circuit,
U1330-11
VR1013-C
1.8
to
2.6
R1013,
VR1013
200
Ω range,
open input
P1711-4A
or 4B
3.5
to 4.7
Q1021,
CR1011.RT1011,
R1331, K1131 and K1231
and their drive circuits, U1300-12, and 14
2
kΩ range,
0 Ω
input
P1711-8A
1.12 to
1.27
K1313
and its
drive circuit,
U1330-11
20 kΩ range, 0 Ω
input
P1711-8A
9.50 to 10.76
U
1330-11
200
kΩ range, 0 Ω
input
P1711-8A
1.12 to
1.27
U1330-11
2 MΩ range, 0 Ω
input
P1711-8A
1.12 to 1.27
U1330-11
20
MΩ range, 0 Ω
input
P1711-8A
___________________
1.12
to
1.27
U1330-11
Table
7-14
OHMS
CONVERTER FAULTS
Symptom
Component
Display
is
incorrect
in all
ranges
Q1315
and
its
drive circuits (diagram 1)
and the output of the Function and Range Register, U1400-
11,
U1500-6
(diagram
2). For each OHMS range, check
the output of the Function and Range
Register U1330-11, 12,
13, and 14 (diagram 3).
Display
indicates
191.90
Ω with a
190.00
Ω input
K1031
and its drive circuit, and the output of the Function and Range Register U1330-13 (diagram
13)
7-18
ADD
JAN
1982
Summary of Contents for DM 5010
Page 14: ...DM 5010 2994 00 DM 5010 Programmable Digital Multimeter xii ADD JUL 1986...
Page 27: ...Operating Instructions DM 5010 2994 03 Fig 2 3 DM 5010 front panel controls and connectors 2 3...
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Page 251: ...Section 8 DM 5010 OPTIONS No options are available 8 1...
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Page 272: ...DM 5010 2994 37 Fig 10 2 Location of DM 5010 adjustments and test points...
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Page 276: ...DM 5010 2994 112 DM 5010 BLOCK DIAGRAM...
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Page 337: ...63 REV JUN 1986...
Page 338: ...FIG 1 EXPLODED DM 5010...
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