4-12
Troubleshooting
Power supply checks
Power supply problems can be checked using Table 4-2. See “Principles of operation” for
circuit theory on the power supply.
Table 4-2
Power supply checks
Step
Item/component
Required condition
Remarks
1
2
3
4
5
6
7
8
9
Line fuse
Line power
TP502
TP503
TP504
TP505
TP507
TP508
TP510
Check continuity.
Plugged into live receptacle,
power on.
+150V, ±5%
-150V, ±5%
+38V, ±10%
-38V, ±10%
+15V, ±5%
-15V, ±5%
+5V, ±5%
Remove to check.
Check for correct power-up
sequence.
Referenced to TP501.
Referenced to TP501.
Referenced to TP501.
Referenced to TP501.
+15VF, referenced to TP500.
-15VF, referenced to TP500.
+5VF, referenced to TP500.
Digital circuitry checks
Digital circuit problems can be checked out using Table 4-3. See “Principles of operation”
for a digital circuit description.
Table 4-3
Digital circuitry checks
Step Item/component
Required condition
Remarks
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Power-on test
U3 pin 19
U3 pin 7
U3 pin 68
U3, lines A0-A19
U3, lines D0-D15
U3 pin 66
U4 pin 7
U4 pin 8
U13 pins 34-42
U13 pins 26-31
U13 pin 24
U13 pin 25
U3 pin 43
U3 pin 44
U3 pin 45
U3 pin 47
RAM OK, ROM OK.
Digital common.
+5V
Low on power-up, then goes high.
Check for stuck bits.
Check for stuck bits.
16.78MHz.
Pulse train during RS-232 I/O.
Pulse train during RS-232 I/O.
Pulse train during IEEE-488 I/O.
Pulses during IEEE-488 I/O.
Low with remote enabled.
Low during interface clear.
Pulse train.
Pulse train.
Pulse train.
Pulse train.
Verify that RAM and ROM are
functional.
All signals referenced to digital
common.
Digital logic supply.
MPU RESET line.
MPU address bus.
MPU data bus.
MPU clock.
RS-232 RX line.
RS-232 TX line.
IEEE-488 data bus.
IEEE-488 command lines.
IEEE-488 REN line.
IEEE-488 IFC line.
D_ADDATA
D_DATA
D_CLK
D_STB
Summary of Contents for SourceMeter 2430
Page 3: ...TAIWAN 1FL 85 Po Ai Street Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031 ...
Page 6: ...Other brand names are trademarks or registered trademarks of their respective holders ...
Page 16: ......
Page 17: ...1 Performance Verification ...
Page 33: ...2 Calibration ...
Page 56: ...2 24 Calibration ...
Page 57: ...3 Routine Maintenance ...
Page 60: ...3 4 Routine Maintenance ...
Page 61: ...4 Troubleshooting ...
Page 75: ...5 Disassembly ...
Page 82: ...5 8 Disassembly ...
Page 83: ...6 Replaceable Parts ...
Page 104: ...6 22 Replaceable Parts ...
Page 105: ...A Specifications Section A pgs 1 5 qxd 11 7 2005 1 35 PM Page 1 ...
Page 116: ...A 12 Specifications ...
Page 117: ...B Command Reference ...
Page 128: ...B 12 Command Reference ...
Page 129: ...C Calibration Programs ...
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