mA Generation
Adjustments
High Voltage Regulator PCB, Offset, Pot R126, TP42-40; Offset, R138, TP43-39; Differentiator, R63, TP31. For details,
refer to the Calibration section of this manual.
Miscellaneous
Signal Names and Functions
HVPRI1 C1 to HV tank primary terminal E1.
HVPRI2 C2 to HV tank primary terminal E2.
LG_FIL Large filament transformer input A9J1/P1. From Filament Driver PCB A21P3/J3.
SM_FIL Small filament transformer input A9J1/P1. From Filament Driver PCB A21P3/J3.
FIL_RTN Filament transformer common return from A9J1/P1 to Filament Driver PCB A21P3/J3.
KVP_FLUX_SEN Single turn winding on HV transformer for sensing flux, from A9J1/P1 to Filament Driver PCB A21P3/J3.
TNK_CHAS Tank chassis ground. Also return for single turn winding (which is the electrostatic shield in the high voltage
transformer). Also used to sense whether a connection is made between A9J1/P1 and A21P3/J3 via cable
assy 00-879447-XX.
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.
LO_MA_SEN_POS From low mA sense resistors in tank, A9P2/J2 to Backplane A1P3/J3. Positive going sense line of pair.
LO_MA_SEN_NEG From low mA sense resistors in tank, A9P2/J2 to Backplane A1P3/J3. Negative going sense line of pair.
HI_MA_SEN_POS From high mA sense resistors in tank, A9P2/J2 to Backplane A1P3/J3. Positive going sense line of pair.
HI_MA_SEN_NEG From high mA sense resistors 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.
13
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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