Ion Source Pcb - Agilent Technologies VS Series Operation Manual

The Motherboard circuitry resides on a stand-alone PCB comprised of five sections:
Parallel interface section with two 64-pin, 0.1x0.1, PC-104 bus type I/O connectors
(J1 and J2)
Non-isolated quad UART/RS-232 section with four I/O, RJ45-8x8 connectors
(J100A/B and J101A/B)
TP TC gauge section with 4-pin I/O connector (J200)
Isolated section that consists of analog output and RS-232 circuitry with 10-pin I/O
connector (J300) and two I/O, RJ45-8x8 connectors (J302) and a calibrated leak
temperature circuitry with 4-pin input connector (J301)
Power Supply section with 3-pin connector (J400) and 4-pin connector
(XJBT1)CPLD section with two 14-pin JTAG connectors (J501 and J502) and RJ45-
10x10 connector (J500)
A.2.3 Ion Source PCB
The Ion Source PCB (Agilent P/N R2120501) creates the high voltage and filament current
supply for all spectrometer tube electrodes under full software control provided by the CPU
PCB.
The Ion Source PCB circuitry provides:
Parallel interface (Data, Address and Control) communication between the Ion
Source and CPU PCBs via the Motherboard PCB
High voltage flyback power supplies for a spectrometer tube such as:
Filament power supply with an emission current regulation loop
CLPD control signals generation
Isolated digital control of the ion voltage (filament bias/repeller voltage) and
emission current (filament voltage) tuning; the filament selecting (FIL 1_SEL and
FIL2_SEL), high voltage supply (HV_ON/OFF) switching
+24 VDC to a +5 VDC DC-DC conversion for the filament supply and +24 V to +15
V for the digital control circuitry
The Ion Source circuitry resides on a stand-alone PCB comprised of five sections:
Parallel interface/CPLD section with a 64-pin, 0.1x0.1, PC-104 bus type I/O
connector (J5) and a 14-pin JTAG connector (J2)
High voltage section with the ion voltage tuning and a 10-pin connector (J4)
VS Series Component Leak Detector
Filament Bias
Suppressor
Chamber/Repeller
A-5