6.4 POWER SUPPLY BOARDS AND MAINTENANCE

Transcription

1 6.4 POWER SUPPLY BOARDS AND MAINTENANCE AC Module with Fuse F1 (on back) Auxiliary power supply Junction box, (closed) individual power supply transformers inside Sine wave driver s in channels HIGH VOLTAGE Can cause ELECTRIC SHOCK or BURN Proper electrical safety precautions must be observed during troubleshooting operations. Unplug the Power Supply power cord from the AC power outlet before removing covers or replacing fuses. NOTE: Safety interlocks will shut off the Power Supply if the covers are not on tightly, or if the gun cables are not connected to the Power Supply. Fig A typical Power Supply with top cover removed, showing s inside (Controls and number of s will vary with power supply model.) REPLACEMENT OF THE MAIN POWER SUPPLY FUSE HIGH VOLTAGE Can cause ELECTRIC SHOCK or BURN FOR EMERGENCY SHUT DOWN, DISCONNECT THE POWER CORD FROM THE AC OUTLET. The Power Supply employs a modular design for ease of operation and repair. The main Power Supply unit includes a number of separate sine-wave driver s, depending on the particular gun. The driver is a sine-wave oscillator and is common to all of the control supplies such as Energy, Source, Grid, etc. Each individual power supply has a corresponding sine-wave driver that provides transformer drive and remote metering signals. In some power supply systems, instead of individual s, there is one auxiliary that drives a transformer that provides power for all floating supplies, except Source. Most s are accessible by removing the top cover of the Power Supply. In some units the junction box is attached below the main unit and its s are accessible by removing the bottom cover. Each pull out is factory-adjusted for a dedicated channel position and is not interchangeable, except for troubleshooting. Additionally, the trim potentiometers on each (current limit, frequency adjustment, voltage adjustment, meter adjustment, etc.) usually should not be changed. However if the cathode in the gun is changed, it may be necessary to adjust the Zener limit trim potentiometer on the Source/ ECC. Consult Kimball Physics before making any adjustments Some Power Supply schematics are included in the Drawings Section at the end of the manual Fuse being replaced Opposite PRSR side empty F1 panel (open) Fig Back panel AC Input Module showing main supply fuse F1 in holder in position for 115 VAC 1. Secure (turn off) operation of the electron or ion gun system according to the shut down instructions in the Normal Operation Section. 2. H. V. WARNING: Unplug the Power Supply power cord from the AC power outlet. 3. On the rear panel of the Power Supply, pry open the small panel labeled F1 at its top edge with a small screwdriver; be careful as the plastic can crack. Similarly pry out the red two-fuse holder. 4. Replace the burnt-out fuse with a new 2 A, 250 V Type T / 3AG fuse (Kimball Physics P/N ). The fuse is opposite the PRSR label. 5. Replace the fuse holder assembly in the same orientation and close the small panel. The fuse is at the outer edge for 115 VAC, inner for 230 VAC. Check that the appropriate 6. Before re-applying power, look for the problem that caused the fuse to blow. For example, discharging in the gun can cause a backsurge of high voltage. 6 MAINTENANCE

2 IGPS-2101 Power Supply Boards, General Layout AC module with fuse F1 (on back) Interface Auxiliary power supply VEE sine wave driver in connector Five channel Mother Deflection Sine wave driver s in connectors Five-channel Mother FlexPanel controller Fig IGPS-2101 Power Supply with top cover removed, showing general layout of s inside unit Transistor for higher power Junction box cover (removed) Individual power supply transformers Long s Opto meter s Fig IGPS-2101 Power Supply with bottom cover and junction box cover removed, showing layout of s 6-36

3 Typical Power Supply Boards and Fuses User replaceable fuses Five channels for driver s (not filled) Fig A typical Mother Board, showing position of fuses (The is not filled so fuses are visible.) The fuse for an individual pull-out is adjacent to that s connector. The number of s installed will vary with the power supply model. Deflection area (not used on some units) Transformer User-replaceable fuses Fig A typical Auxiliary Power Supply Board with deflection, showing position of fuses User-replaceable fuses Grid power supplies Fig A custom Grid Pulsing Power Supply Auxiliary Board, showing fuses for s in unit see Table 6.3-1) Sine wave driver s (pullout ) Energy Source Grid Mother with connectors Fig Typical pullout Sine Wave Driver Boards in Mother Board (for s in unit see Table 6.3.1) 6 MAINTENANCE 6-37

4 6.4.2 REPLACEMENT OF INTERNAL FUSES Potentiometer for adjusting Zener limit HIGH VOLTAGE Can cause ELECTRIC SHOCK or BURN High Voltage will be present on the exposed gun connector end of the cable and inside the power supply during this troubleshooting procedure. Do not touch cable end or supply components when the power supply is energized. A number of user-replaceable surface mount fuses are present on several s in the Power Supply as shown in figures on the preceding page. The particular s and number of fuses depend on the power supply model and gun options, see Table below. Some s include poly fuses which reset automatically and should not need to be replaced. 1. Secure the electron or ion gun according to the shut down instructions in the Normal Operation Section. Disconnect ALL of the cables from the gun. The other ends of the cables must remain connected to the Power Supply. 2. Remove the screws in the top cover of the Power Supply, and lift it off. 3. Inspect the various fuses, in particular the fuses next to the of the supply that failed. Measure resistance across fuses with an ohmmeter. If resistance is greater than 1 Ω, the fuse needs to be replaced. 4. Replace the blown fuse with one of the same value and rating, see Table Fuse reference designators are printed on the and shown in the schematic. 5. Replace the top cover, and secure with its screws. 6. Energize the power supply and check operation of the supply that failed. Pins 1 to 50 Fig A typical Sine Wave Driver Board (no fuses) This is a Source showing Zener adjustment potentiometer REPLACEMENT OF SINE WAVE DRIVER BOARDS At present, the individual sine wave driver s are not user-replaceable and are not interchangeable, because the s require specific calibration. If it is suspected that a is at fault, contact Kimball Physics Engineering for guidance in troubleshooting ZENER LIMIT ADJUSTMENT Contact Kimball Physics for instructions and advice before adjusting the Zener limit. The limit is pre-set during testing at Kimball Physics to protect the cathode or ion source from high Source voltage or current that could decrease its lifetime. Other troubleshooting may be recommended prior to changing this limit. The adjustment potentiometer is located on the Source sine wave driver as shown in the figure above. NOTE: Safety interlocks will shut off the Power Supply if the covers are not on tightly, or if the gun cables are not connected to the Power Supply. If these procedures and the information in the General Troubleshooting Tables (Section 6.2) do not repair the Power Supply, contact Kimball Physics for guidance in further troubleshooting. Kimball Physics Engineering phone: , fax: info@kimphys.com 6-38

5 6.4.5 POWER SUPPLY BOARDS AND FUSES TABLES Table Boards used in IGPS-2101 Power Supply BOARD LABEL BOARD TYPE KIMBALL PHYSICS BOARD NUMBER Ion Energy Sine wave Driver rev3 Source Sine wave Driver rev3 Grid (Field Control) Sine wave Driver rev3 Extract Sine wave Driver rev3 Focus Sine wave Driver rev3 VEE Electron Energy Sine wave Driver rev3 5 Channel Mother Board (two) rev3 CE Auxiliary Power Supply rev3 Rear panel remote interface RS-serial port & 50-pin analog OR SCSI, NI connectors FlexPanel Controller Digital Interface Board Deflection Board (±150V) Opto Meter Board with Floating Auxiliary Power Supply Long Board (one + one partial) rev1 OR rev revb rev rev rev1 LOCATION Pull-out, at ground, main section (in order of connectors) Fixed, main section Fixed, in junction box Table Fuses used in IGPS-2101 Power Supply FUSE LOCATION AC Input Module (Rear Panel) Mother Board Auxiliary Power Supply Opto Meter Board FlexPanel Controller FUSE REFERENCE DESIGNATORS VALUE RATING / SIZE KIMBALL PHYSICS PART NUMBER F1 2A 250 V, Type T / 3AG F1 - F5 1 A 125 V, Type F / SMF F1, F2,F3, F5 750 ma 125 V, Type F / SMF F4, F15, F ma 125 V, Type F / SMF F A 125 V, Type F / SMF F6, F7, F8, F9, F10 1 A 125 V, Type T / SMF F A 125 V, Type T / SMF F13, F ma 125 V, Type T / SMF F1, F2 500 ma 125 V, Type T / SMF F1, F2 500 ma 125 V, Type F / SMF MAINTENANCE 6-39

6 6.4.6 RGDU-4A RASTER GENERATOR DEFLECTION UNIT BOARDS AND FUSES AC Module with Fuse F1 (on back) Rear interface Auxiliary power supply (with deflection supplies) Raster Deflection FlexPanel controller Fig RGDU-4A with top cover removed, showing general layout of s inside unit Table6.4-3 Boards used in RGDU-4A BOARD LABEL BOARD TYPE KIMBALL PHYSICS BOARD NUMBER Raster Board Deflection Board (±300V) CE Auxiliary Power Supply Rear panel remote interface RS-serial port & 50-pin analog FlexPanel Controller Digital Interface Board 197A301A modified rev rev rev LOCATION Fixed, main section Table Fuses used in RGDU-4A FUSE LOCATION FUSE REFERENCE DESIGNATORS AC Input Module (Rear Panel) Auxiliary Power Supply VALUE RATING / SIZE KIMBALL PHYSICS PART NUMBER F1 2A 250 V, Type T / 3AG F1, F2,F3, F5 750 ma 125 V, Type F / SMF F4, F15, F ma 125 V, Type F / SMF F A 125 V, Type F / SMF F6, F7, F8, F9, F10 1 A 125 V, Type T / SMF F A 125 V, Type T / SMF F13, F ma 125 V, Type T / SMF