6-78
3. Check U3320 pin 11 for LO-to-HI transition. If not gating, replace OR-gate U332.
2. Check U3320 (schematic diagram 2) pin 13 for LO-to-HI transition. If not occurring, replace
Waveform ~P U470.
1. Check U860 pin 15 for LO-to-HI transition. If not occurring, replace U860.
Run test 5200 in CONTINUOUS mode. Using the CH 2 Probe:
Set up the 2430 test scope as in Step 1 of the 2110 troubleshooting procedure.
Troubleshooting Procedure:
This test executes a bus request by setting bit 05 (pin 14) of PCREG UB60 (schematic diagram 1) HI,
delaying 10 ms, and checking bit 06 of INTREG (Interrupt Register) U654 to see if a BUSGRANT has
occurred.
Testing Method:
5200
BUSGRANT
Use the Waveform ~P Kernel test in Procedure 8 to troubleshoot for a ~P fault or a fault on the
Waveform ~P address or data bus.
Troubleshooting Procedure:
Loads a task into Command Memory U440 and tells the Waveform ~P to execute it. A 30 ms timeout
is executed; and then, INTREG (bit 0) is tested for WPON. If it has not been set, the task did not exe-
cute and terminate properly. If 5100 fails, it could be the Waveform Processor code ROMs, or the
Waveform ~P itself (U470). In any event, the Waveform Processor Kernel tests will need to be run to
diagnose the source of the problem.
Testing Method:
5100
RUN-TASK
The Waveform ~P command memory has been checked out by this time as well as the bus structure
that permits the System ~P to control the Waveform ~P bus.
The Waveform Processor test first sets all test results to NULL. Any failures will be fatal in terms of
instrument operation; however, the last test that was executed will be set FAIL and should help in
diagnosing the cause of the problem.
The nature of these tests is such that all tests must be executed in order and may not be individually
executed. Therefore, any attempt to execute one test will result in all tests being executed.
Testing Method:
Waveform ~P A12U470 (schematic diagram 2):
5000
WP U470
2. If the battery voltage is correct, troubleshoot the detection circuitry as for a failure of test 4710,
looking for the cause of a LOW reading.
1. Measure the battery voltage for a range of 2.4 V to 3.5 V. If low, replace the battery (BTBOO)
observing the proper handling procedures.
Table 6-6 (cont)
Maintenance-2430 Service
To Next Page
Loading...
