Simpson 2 Series - Page 33

Maintenance
from a Simpson Parts Depot (pages 37-39), specifying the
part number as shown in the parts list. Then clip the defec-
tive resistor off the printed circuit board, leaving the leads
in the board to use as connections for the replacement.
Carefully twist the leads for the new resistor around the
leads left from the defective resistor, and solder each
connection. Trim away all excess and check that no shorts
have developed due to the substitution.
REMOVING THE PRINTED CIRCUIT
When access is required to the under-side of the printed
circuit, or to the parts which are located between it and
the front panel, remove the printed circuit.
Use the following procedure:
1. Set the function switch at +D.C. and the range switch
at 2:5 Ve
2. Remove the knob for the ZERO OHMS control.
3. Remove the two screws through the lower part of the
printed circuit board.
4. Remove the two hex nuts from the meter studs on the
top of the printed circuit board.
5. Carefully pry out the battery contact at the + terminal
for the small 1.5 volt cells. This 1s connected to the
upper left hand corner of the printed circuit board with
an orange lead.
6. Lift the printed circuit board away from the front panel.
The entire board, with the switch wafers in place, will
come up in one piece.
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