HP 8114A - Page 157

HP 8114A Service Guide
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Selftest failed
HP-1B message = “ROM test failed”
Local message = “ROM test failed”
Description:
Flash EPROM test failed on Microprocessorboard.
Selftest failed
HP-IB message = “RAM test failed”
Local message = “RAM test failed”
Description:
Static RAM test failed on Microprocessorboard.
Selftest failed
HP-IB message = “Crystal Reference for UP lost”
Local message = “Crystal Reference for UP lost”
Description:
A loss of crystal reference has been detected and the
VCO is running at approximately half of maximum
speed, determined from an internal voltage reference.
Normally the external crystal frequency is VCO
reference.
Selftest failed
HP-IB message = “VCO for UP has not locked”
Local message = “VCO for U P has not locked”
Description:
The VCO is enabled, but has not yet locked. Normally
the VCO would have locked on to the desired
frequency.
Selftest failed
HP-IB message = “Unexpected Reset of UP”
Local message = “Unexpected Reset of UP”
Description:
The reset was caused by one of the following:
l the powerup reset circuit
n the software watchdog circuit
n the system protection submodule halt monitor
n a loss of frequency reference to the clock
submodule
n the test submodule
Normally the last reset was caused by an external
signal or by the CPU executing a reset instruction.
Troubleshooting 5-39