kV Generation
Signal Names and Functions
X-Ray Controller PCB
(See X-Ray On, X-ray Disable section.)
High Voltage Supply Regulator
KVP_SEN Analog signal represents kVp output from tank voltage divider.
KVP_SEN_REF Ground reference for above through resistor.
HF_SYNC 120kHz squarewave to synchronize PWM oscillator, via B/P
V_SLOW_RAMP Ramp control signal, via backplane. Controls pulse shape.
FAST_RAMP* Ramp control signal, via backplane. Controls pulse shape.
MOD_READY +5V from internal regulator in PWM chip, goes low on fault
KVP_SEN_POS From kVp sense voltage divider in tank, A9P2/J2 to Backplane A1P3/J3, positive going sense line of pair.
KVP_SEN_NEG From kVp sense voltage divider in tank, A9P2/J2 to Backplane A1P3/J3, negative going sense line of pair.
CBL_SHLD Shields of the above three twisted pairs, connected to tank chassis and to chassis ground at Backplane via
cable asm 00-879454-XX.
XRAY_ON* Active low logic level controls X-ray pulse envelope.
XRAY_ENABLE* Active low logic level controls X-ray production.
KVP_CNTL Analog level controls kVp output of Generator.
KVP_CNTL_REF Analog ground reference for KVP_CNTL..
KVP_DRV_A_TOP Optocoupler drive signal for IGBT Q1 upper gate G1.
KVP_DRV_A_BTM Optocoupler drive signal for IGBT Q1 lower gate G2.
KVP_DRV_B_TOP Optocoupler drive signal for IGBT Q2 upper gate G1.
KVP_DRV_B_BTM Optocoupler drive signal for IGBT Q2 lower gate G2.
KVP_DRV_RTN Optocoupler return current path, enabled or disabled by faults.
SHUTDOWN Logic level signal active high, disables generator
ANALOG_RTN Analog direct ground return path for FIL_ERROR etc.
FAULT_RST Logic high clears all fault latches on Generator Driver & HVSR.
FAULT Active high logic level signal indicates a latched fault condition
GND_INTEG* Active low logic level signal indicates ground connection to tank
13
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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