INFICON STC-2000A Thin Film Deposition Controller Operating Manual - Manual (Page 38)

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STC-2000A DEPOSITION CONTROLLER
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Installation/Removal of Sensor Card, Input Cards, Output Cards: Although other combinations are
possible, the following procedure is recommended for field installations and removals. There are human
safety issues and component damage issues that are addressed by this procedure. Please read this
procedure in its entirety first before commencing the actual work. Return of the unit is preferred.
1. Disconnect all electrical connections to the STC-2000A. This includes all I/O connections, Sensor card
connections, RS232 connections, other communications connections, pendent, memory card connections,
ground wires and especially the power cord connection. Ensure that the power cord is removed from the
back panel IEC 320 connector and that the STC-2000A unit is on a properly grounded rubber mat (or
equivalent). The person doing this work should also be properly grounded by wearing a grounding strap.
2. Remove the four screws that secure the bottom cover. Remove the bottom cover. Store these items
together in anticipation of reassembly.
3. With the bottom cover removed, look inside the STC-2000A. Disconnect the power connection between
the IEC 320 connector/switch assembly (mounted on the back panel) and power supply. This will be a 3
position Molex
® type connector housing with red and black wires plugged onto a mating header that is part
of the internal power supply. This will allow for the removal of the back panel. Next, disconnect the 4 pin
connector from the RS232 board (mounted on the back panel by its 9 pin D-SUB male connector). Finally,
the quick-disconnect connectors attached to the ferrite bead assemblies may also be removed (one connects
to the internal power supply and the other connects to the DC wire harness). As there is some slack in these
connections, their disconnection is not imperitive. If left connected, do not subject these connections to
pulling or twisting stress.
4. Locate the two screws on each of the side panels that hold the back panel in place. These are located on
the side panels near the back panel (the screws go through the side panels and into the back panel).
5. The back panel/PCB assembly can be pulled straight back away from the STC_2002. A slight up and
down rocking may help the connections come apart. Observe that the bus bd. (502-211), is not flexed as the
the back panel is moved. The bus bd. (502-211) can be held from flexure with a thumb. The back panel
assembly will include the power switch/receptacle/wire harness assembly and the PCB cards secured to the
back panel. The back panel / PCB assembly must be pulled out straight away from the unit: the header pins
may be bent otherwise.
6. With the back panel / printed circuit board assembly on the grounded mat, remove the hardware (hex
shaped screws, hex nuts, etc.) securing the back panel mounted PCB cards that need to be removed. Place
the PCBs to be added or removed PCBs, if any, on the grounded mat.
7. PCB cards may be added or removed from the back panel at this time. PCB mounting hardware is
removed or added. Securing the PCB cards to the back panel is accomplished by use of the connector
mounting hardware.
8. Introduce the back panel assembly back into the unit moving it horizontally across the table while
maintaining its orientation such that the back panel remains parallel to the front panel. Ensure that the
power connector harness wires are not pinched or that the insulation on the wires is not damaged. As the
PCB nears its mating connection, align the assemblies such that the header pins correctly engage and insert
straight.
9. Carefully align all back panel secured PCB connector headers with the mating socket headers on the bus
PCB (502-211). Start alignment at one end of the bus board, holding each back panel secured PCB lightly
in place until all are aligned then press on the bus board to keep it from flexing as all utilized bus board
connectors are fully engaged with the mating back panel secured PCBs.
10. Secure the back panel assembly to the side panels with the 4 screws previously removed.
11. Check PCB interconnections for bent pins or misalignments. If there are problems, reverse process to
the point needed to correct the problem.
12. Reconnect the switch/IEC wiring assembly connector housing to the power supply header. Reconnect
the DC connector housings to the power supply header (6 positions) and ferrite ground assemblies.
13. Replace the bottom cover and secure it with the 4 screws.
14. Reconnect the power cord into the IEC connector.
15. Power on the unit.
SECTION 2.XX page 38 of 292