Specifications

2. If fuse is not open, measure input TP for the unregulated
voltage.
3. If the unregulated input is correct, replace the regulator.
d. If DS16 is illuminated RED:
e. Use the Multimeter to measure the +5VDC power supply.
f. If the supply has been reduced to less than 80% of normal:
1. Check the input fuse and replace if necessary.
2. If the fuse is not open, measure input TP for the unregu-
lated voltage.
3. If the unregulated input is correct, replace the regulator.
g. If all supplies measure correct:
1. Check TP10 for +5VDC and replace U11 if necessary.
2. If TP10 is okay, measure the voltageson the comparator
inputs and outputs to determine if the comparator is
faulty.
Q.7 Removal\Replacement
With the low voltage power supplies shut off, remove the allen
screws from the front panel knob and pull it straight out. Remove
all connectors and top outside mounting screws.
When installing the replacement board, reverse the above proce-
dure. Ensure that all jumpers and switches are set to the same
position as the original board.
When installing a new board, verify that all jumpers are in the
same position as the original board.
Q.8 Alignment
Verify that the voltages at TP1 and TP2 are +2.00VDC. If they
are not, adjust R27 for TP1 and R36 for TP2.
Q-6 888-2339-002
WARNING: Disconnect primary power prior to servicing.