AMX4 Plus problem

Steve:
IV. Applications Power-Up Errors



A. No tests run.

1. Check LED's on Processor board -

a. All on - Processor not running

b. All off - Test failed

2. Check for possible failure of LVLE Power supply



B. Test Failure - This information is provided for the benefit of the Service Engineer

1. Test - 1 (EPROM Check Sum)

a. Possible failure of Microprocessor

2. Test - 2 (RAM Battery Test)

a. Ram battery may be below 2.0 volts

3. Test - 3 (Auxiliary RAM Test)

a. Possible CPU failure

4. Test - 4 (Calibration Data Base Check Sum)

a. Calibration and Ram need to be checked

5. Test - 5 (Watchdog Timer)

a. Timer (HC123 One shot and associated circuitry) needs to be checked

6. Test - 6 (Programmable Interval Timer 0 and 2)

a. Check Timer 92C54, HCl518, 8 to 1 MUX, oscillator, and associated circuitry

7. Test - 7 (Analog to Digital Converter Test)

a. Check +5 volt supply, AD574A A/D Converter, LF398 sample and hold, AD7506 16
to 1 MUX, HC374 latch, and all associated circuitry

Thanks, I believe my ram batteries are bad. Ordered new. We'll see tomorrow.