Fluke NetDAQ 2640A, Service Manual

Page: 203 / 260

Diagnostic Testing and Troubleshooting
Loading Embedded Instrument Firmware
5
5-39
WARNING
To avoid electric shock, do not touch any portion of the
instrument except as described in this procedure.
3. Turn on the instrument power and observe self test reports error 7.
4. Connect the selected PC COM port to A3P1 using the connection shown in
Figure 5-3. This connection must be made when instrument power is on. Use
standard connector parts to assemble this custom cable.
P1
1
2
3
P1
1
2
3
DB-9S
2
3
5
DB-9P
2
3
5
2
3
7
DB-25S
2
3
7
PC (25 Pin)
TX
RX
Signal
Ground
PN 845339
Socket, 1 Row,
.100 CTR, 3 POS
PN 347617
Connector,
D-SUB, 9 Pin
RS-232 Cable, Model RS40
PN 851712
A/D RS-232 Extender Cable NetDAQ A/D
P1
1
2
3
P1
1
2
3
DB-25S
2
3
7
DB-9P
2
3
7
2
3
5
DB-9S
2
3
5
PC (9 Pin)
RX
TX
Signal
Ground
PN 845339
Socket, 1 Row,
.100 CTR, 3 POS
PN 312587
Connector,
D-SUB, 25 Pin
RS-232 Cable, Model RS40
PN 851712
A/D RS-232 Extender Cable NetDAQ A/D
Figure 5-3. Connection to A3P1 for Loading A/D Firmware
5. Apply +12V dc, 300 mA, programming power from an external source to A3J3 or
A3P2. The + voltage is connected to A3P2-1 or A3J3-2. This connection must be made
when instrument power is on.
6. At the PC, obtain the DOS prompt
C:\>
. (Do not shell to the DOS prompt from
Windows.)
7. If you have not already done so, copy the contents of the diskette into a directory on
your hard drive, e.g.,
firmware
, and change to this directory (
C:\firmware>
).