Simpson 385-3L, Operator'S Manual, Page: 11 / 12

11
To obtain replacement parts, address order to the nearest Authorized Ser-
vice Center. Refer to paragraph 2.2. for ordering instructions.
Table 5-1. Replacement Parts List
Ref. Sym. Description Part No.
R1 Resistor, 57.7k
⍀
,
⫾
0.5% 1-119734
R2,R3 Resistor, 7.56k
⍀
,
⫾
1% 1-119735
R4 Resistor, 9.25k
⍀
,
⫾
1% 1-119736
R5 Resistor, 5.1k
⍀
,
⫾
5% 5-119351
R6 Resistor, 3.31k
⍀
,
⫾
0.5% 6-114951
R7 Potentiometer, 50k
⍀
,
⫾
20% 6-114974
S1 Switch, Probe Selector 6-114965
S2 Switch, Function Selector 6-114966
M1 Meter, 0-50 DC µA 10-865868
Knob Function & Probe Selector 3-260180
Set Screw, Knob 1-114178
Figure 5-1. Wiring Diagram
NOTES:
Unless specified, resistors are in Ohms
Switches show in extreme counter clockwise
SW1 Probe selector
SW2 Function selector
+
¯
+
¯
B1
1.5V
2
3
7
8
9
1
2 3
C
SW2
A
SW1
R3
7560
5100
50K
9250
R2
7560
R4
R7
R5
R1
57.7K
M1
50
␮
A
R6
3310
2100
⍀
A
1