Simpson 260 - Applications; General; Rectifier Checks

MAINTENANCE
he Adjust rheostat R-28 fully clockwise. It is
located in the extreme upper left hand corner
of the printed circuit board, next to the
1+6 ү" marke
5% Rheostat R-31 is located next to R-28, toward
the center of the printed circuit board.
Adjust it so the meter reads 1.8 volts on the
2.5 V.A,C, ONLY arc,
6. Adjust R-28 so the meter pointer moves back to
1.71 volts on the same arc, (the pointer will
indicate 6 on the OHMS scale when it is in
this position).
RESISTOR REPLACEMENT
Almost all of the resistors for the Models
260 and 270 are mounted on the accessible face of |
the printed circuit board for easy trouble-shooting .
and repair.
When it is necessary to replace any of the
resistors in the printed circuit, first obtain an
exact equivalent resistor from Bach-Simpson Limited
or their distributors, specifying the description
and part number shown in the parts list. Then clip
the defective 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 resis-
tor around the leads left from the defective
resistor, and solder each connection. Trim away
all excess and see that you have not caused any
short circuit to any other part nearby.