Preliminary Troubleshooting; Troubleshooting Specific Areas; Power Supply Voltages - Data I/O 298 Manual

3. Check that the programming module is fully seated in
the mating connector (J7) of the controller card. During
operations with the programming module removed, TP3
must be grounded by a jumper to TP2.
4. Remove any cables attached to the serial interface.
5. Check the power supplies according to the calibration
procedure in paragraph 4.2. If this reveals a problem,
refer to "power supplies" paragraph 4.4.2.
6. Check the installation of all hardware. Check the
orientation and connection of all cables as well as the
seating of the PC boards. Check all jumpers.
7. Check the controller as described in paragraph 4.4.2.
8. If steps 1 through 7 do not reveal the problem, contact
your Data 1/0 Service Center.
Serial 1/0 Failures
If the serial interface does not work properly, check the
following:
1. Make sure the programmer and other equipment to
which it is connected are set for the same parity, baud
rate, and number of stop bits.
2. Check the operation of the peripheral equipment
according to the manufacturer's procedures.
3. Troubleshoot the serial interface circuitry as described in
paragraph 4.4.2.
4.4.2 TROUBLESHOOTING SPECIFIC AREAS
The following paragraphs discuss specific areas of circuitry.
After performing each step, determine whether the problem
continues.
Power Supplies
If it has been determined from preliminary troubleshooting
that a problem exists in the power supplies, do the
following:
1. Turn the programmer off for 30 seconds and then on
again. Portions of the power supply employ foldback
overcurrent protection. If a supply becomes overloaded,
it will remain off even after the overload is eliminated.
The protection circuits can be reset by turning the
programmer off for 30 seconds and then on again.
2. Refer to table 4-3 to check the voltage for each power
supply circuit. Test points are shown in figure 4-2.
3. To replace any components associated with the + 5 V,
-5V, or + 12V supplies, first remove jumpers JP1
through JP5 to protect other circuits from overvoltage.
When component replacement is complete, reinsert the
jumpers and calibrate the programmer per section 4.3.1.
Table 4-3. Power Supply Voltages
PIN ON VOLTAGES
SUPPLY CALIBRATOR
OR EXTENDER Min. Nom.
Max.
+5t +5
5.00 5.11 5.15
+24*
+24 23.5 24.0 24.5
+48* +48
49.5 49.7 49.8
-9 -9 -9.20 -9.00 -8.80
-5t
JP3
-5.25 -5.00 -4.75
+PROG V* +PROG
4.80 4.00 5.11
+12t JP2
11.4 12.0 12.6
*
A programming module must be installed or TP3 must
be grounded.
t To replace faulty components associated with this
supply, first remove jumpers JP1 through JP5. After
bringing the supply into range, replace the jumpers and
calibrate the programmer.
4-8
10-990-0013