Haemonetics PCS 2, Руководство пользователя

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Note: The labeling of P507 test points located on the
b
ackplane card are
for reference in this illustration and do not appear on the b ackplane
card.
2. If calibration is required, the removal of the cage cover is necessary to
gain access to the power supply trim pots. To remove the cage cover
you must first remove the middle and left Phillips head screws on the
top of the cage where the two piece cage comes together. Then
remove the two screws on the bottom of the cage. Pull the half of the
cage closest to the rear of the machine straight out the back of the
machine.
3. To calibrate the power supply voltages, connect a voltmeter to the
appropriate pin at P507 on backplane board and measure the +5 VDC
supply. Adjust the +5V trim pot and the “R29” on the power supply
board, to +5.1 VDC. The trim pot is closest to the rear of the machine
on right hand side. Etched on the board next to the correct pot is
“R29” and the words “5V Adj.” All other voltages, except the 28
VDC, will track the 5 volt supply. Although no adjustments can be
made to the other voltages, please check and verify that they are
within their respective specification. Voltages that cannot be brought
within their respective tolerances indicate a problem with the power
supply or the loads on that supply.
4. To calibrate the 28V supply output, connect a voltmeter to the
appropriate test point of P507 and record the measured voltage. To
adjust the 28V supply, locate R9 on the power supply board, which is
located towards the middle of the board between two black coils
(approximately 2 inches behind J1).
4-2 PCS2 Service Manual
Figure 4-2, Todd Power Supply (top view)