TROUBLESHOOTING
5-18
VersaPulse Select Service Manual
0621-499-01 12/95
®
®
F21 - POSITIVE 12 VDC WRONG - Check the +12 VDC.
F22 - ROM CRC CHECK FAILED - This check is done during self test only. Software EPROM has failed the self
test. If this fault persists change out the CPU PCB or swap out the EPROMs.
F23 - SAFETY RELATED DATA ERROR - If this fault persists, change out the CPU PCB.
F24/F25 - SHUTTER DRIVE STUCK ON/OFF - These two checks are done during the self test sequence. Refer
to figure 4.2 (in Section 4). Stuck on indicates that the SHTR DR SNC line is at 24 VDC when the SHTR DR signal
is not active (The Q2 transistor is on when it should not be). Stuck off indicates that the SHTR DR SNC line is not
at 24 VDC when the SHTR DR signal is active (the Q2 transistor is not on when it should be).
F26 - SERVO ERROR - This check is done during self test only. The servo controller has test operated the servo
system and found a problem. This could be a problem with the 24 VDC supply voltage, the Servo Amp PCB, the
motor, the position sense, or the CPU PCB.
F27 - SOFTWARE ERROR - If this error persists, replace the software EPROMs or CPU PCB.
F28/29 - SAFETY SHUTTER NOT CLOSED/OPENED - The safety shutter SHTR DR SNC line has indicated that
the shutter voltage is present (shutter open) or not present (shutter closed) when it should not be. This could be
a problem with the safety shutter (Dual Solenoid PCB), Shutter PCB, footswitch, CPU PCB or the 24VDC supply.
F30/31 - not used
F32 - CAP FEEDBACK WRONG - This check is done during self test only. The DAC output is ramped up through
its range of operation, and read back through the ADC across the range. If the ADC readback differs from the
command sent to the DAC, this error occurs. If the error persists, change out the CPU PCB.
F33 - HCTL SERVO CONTROLLER BUSTED - This check is done during self test only. CPU PCB U30 (the servo
controller) has failed its self test. If this error persists, replace the CPU PCB.
F34 - DPRAM DATA INCORRECT - The dual port RAM has a problem. If this fault persists, replace the CPU
PCB.
F35 - NOFIRE - The /NOFIRE/ signal has been asserted.
F36 - SAFETY PROCESSOR ERROR - If this fault persists, replace the CPU PCB.
F37/F38 - ENERGY HIGH/LOW - The energy of a single pulse is more than two times (F37) or less than half (F38)
of the requested energy.
F39 - NO LASER ENERGY -
F40/41 - PULSE RATE HIGH/LOW - The pulse rate is more than twice of that requested (F40) or less than half
of that requested.
F42 - UNEXPECTED FIRE PULSE - A fire pulse was detected when one was not expected. If this fault persists,
replace the CPU PCB.
To Next Page
Loading...