PROCEDUREv2.10
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    ***** POWER SUPPLY and 20 MHz CLOCK ADJUSTMENT PROCEDURE *****/R/R
               Copyright (C) 1992 Audio Precision Inc./R/R/R/R/R
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A GENERAL PURPOSE DC VOLTMETER AND COUNTER ARE REQUIRED FOR THIS PROCEDURE./R
/R/R
REMOVE THE TOP AND BOTTOM U-SHAPE "TUNNEL" SHIELDS ENCLOSING THE POWER/R
SUPPLY AND MAINFRAME INTERFACE ASSEMBLIES.  POSITION THE UNIT TO GAIN ACCESS/R
TO THE POWER SUPPLY (PSA) BOARD./R
/R/R/R/R/R
PRESS <Enter> TO CONTINUE, <F1> TO ABORT.../E
L T LVFCAL1/R
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CHECK\ADJUST:  -15 SUPPLY FOR -15.00 V, +\-0.15 V.../R
               +15 SUPPLY FOR +15.00 V, +\-0.15 V.../R/R
/R/R
   -----------------------------------------------/R
   |      PSA-1 or PSA-2/R
   |  o/R
   |  o/R
   |  o/R
   |  o                 O <-- -15 Adjust/R
   |  o/R
   |  o/R
   |  o/R
   |  o/R
   |  o <-- -15         O <-- +15 Adjust/R
   |  o <-- +15/R
   |  o/R
   |  o/R
   |/R
   -----------------------------------------------/E
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CHECK ONLY:    -22 SHOULD BE -21.5 TO -22.7 Vdc.../R
               +22 SHOULD BE +21.5 TO +22.7 Vdc.../R
                +5 SHOULD BE +4.95 TO +5.10 Vdc.../R
/R/R
   -----------------------------------------------/R
   |      PSA-1 or PSA-2/R
   |  o/R
   |  o/R
   |  o/R
   |  o                 O/R
   |  o/R
   |  o/R
   |  o <-- +5/R
   |  o <-- +5/R
   |  o                 O/R
   |  o/R
   |  o <-- -22/R
   |  o <-- +22/R
   |/R
   -----------------------------------------------/E
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POSITION THE UNIT TO GAIN ACCESS TO THE MAINFRAME INTERFACE (MFI) BOARD./R/R
CONNECT A COUNTER BETWEEN TO THE 20 MHz TEST POINT LOCATED NEAR THE FRONT/R
40-WIRE CABLE CONNECTOR AND GROUND./R
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-------------------------------------------------------------------------/R
| NOTE:  There have been 5 versions of the MFI board (MFI-1 to MFI-5).  |/R
|        The MFI-1 and early MFI-2 boards do not contain a test point.  |/R
|        Refer to the figures in Section 3.8 of the service manual for  |/R
|        the location of alternate 20 MHz test nodes.                   |/R
-------------------------------------------------------------------------/R
/R/R/R
ADJUST THE VARIABLE CAP (MFI-1 TO MFI-4) OR VARIABLE INDUCTOR (MFI-5 ONLY)/R
FOR A COUNTER READING OF 19.9994-20.0006 MHz.../E
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POWER SUPPLY AND 20 MHz CLOCK ADJUSTMENTS COMPLETE./R/R/R
REPLACE BOTH U-SHAPE SHIELDS BEFORE CONTINUING WITH NEXT PROCEDURE.../E
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