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__________________________ MODEL 2234 DIGITAL FLOW COMPUTER
C.
As a general procedure, turn off the power, pull out the board enough to
attach digital voltmeter leads with the miniature clips, replace the board
carefully and then re-apply power. Make sure nothing is shorted before
applying power.
D.
Adjust the +24 V supply to obtain a +1.000 V reading between TP1(+) and
TP3(-) on PC Board No.1 (DE-8992). On PC Board No.1 (DE-10421), obtain
a +1.000 V reading between TP3(+) and TP1(-). See Figure 4-3 for power
supply voltage adjustment locations. For test point locations, refer to Figure
4-1 or Figure 4-2.
E.
Adjust the potentiometer on the +5 V power supply to obtain a +5.14 V to
5.15 V reading between TP3(-) and Pin 24 of Eprom U5 (+) on older PC
Board No.1 (DE-8992 series). On PC Board No.1 (DE-10421 series), adjust
the +5 V power supply to obtain a +5.14 V to 5.15 V reading between
TP1(-) (or right grounded leg of capacitor C61) and pin 24 of Eprom
U14A(+).
140
SECTION 4
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