Sequential Circuits Prophet-5 Service Manual - Audiofanzine

1 J^. To vector to the internal test program, jumper TP305 (U32if-10) to +5V then switchpower on. (The test point location is shown on PP351, Section 10). The test will start,indicating the memory section in the PROGRAM display:1 = Scratchpad RAM2 := NV RAM3 = NV RAM load^ = 82^3 Timer= End of test. No failures.5. If a test fails, the program halts and displays the section number for the problemarea. Further tests are not executed until the problem is fixed.11-^ REVISION 3.2 MEMORY TESTAll Rev 3.2 Prophet-5s have the memory test built-in.Rev 3.2Software:2^52-2^55, 2^57-2^65, 2467-2^76, 2^78 and upV.9.2Software level V.9.2 has the memory test only. Later-production instruments havesoftware version V.9.3 which prefaces the memory test with a basic CPU test. Thisroutine doesn't use RAM so is useful for seeing if the CPU itself is working andaccessing PROM.^NOTE. Check that the RECORD switch is ENABLEd, and that user's programs arestored on cassette or via the Model 1003 Polyphonic Sequencer since the memorv testserase the NV RAM-^contents.1. First, switch power off.2. To vector to the internal test program, jumper TP30^ MEM TEST to +5V then switchpower on.3. If software is V.9.3, the Prophet will sequentially flash its LEDs (in the order inwhich they are wired in the matrix). To exit this mode and start the regular RAM test,press TUNE.^. The memory test will start, indicating the memory section in the PROGRAM display:1 = Scratchpad RAM2 = NV RAM3 = PROM^ = 8253 Timer= End of test. No failures,3. If a test fails, the program halts and displays the section number for the problemarea. Further tests are not executed until the problem is fixed.TM1000D.2 10/81 li-5