Fisher 1212 x
1
Receive Coil +2.5V +2.5V +2.5V +2.5V +2.5V +2.5V +2.5V +5V +5V +8V White Green Black Red Transmit Coil +5V 9V VR1 LM2931 +5V +2.5V +8V Fisher 1212X Traced from PCB by Rodney Gray Orig. 1992 Revd. 10/31/06 +5V C7 .22uF R6 10K R3 1K R4 49.9 ohm Q2 2N4403 R5 3.92K C5 .22uF Part of U1 7 8 11 C8 4700pF C9 .1uF R8 1K U1 4 3 5 1 R11 20K C11 .22uF R13 49.9K D1 1N4148 D2 1N4148 C13 .47uF R9 10K R10 20K C10 2200pF R7 2.7K C15 .022uF R15 1M D4 1N457 D3 1N457 R21 2.7M C19 22pF R16 560 R17 10K C16 .022uF R18 1M U1 U2 U2 U2 U2 U3 U3 R22 20K R20 49.9k C20 22pF D5 1N457 D6 1N457 D7 1N457 Part of U1 11 10 9 R28 75K 5 6 7 R30 6.8K C22 22pF R32 100K R31 1K C23 .01uF Q3 MPS A13 Q1 2N4403 C2 100uF 10V SP1 16 ohm R35 100 ohm C21 1800pF R25 75K D11 1N4148 R24 1M 3 2 1 R27 270K R26 270K 8 9 10 5 6 7 R14 49.9K C14 .47uF 14 13 12 R12 20K C12 .22uF 16 3 2 1 13 12 14 C1 1000uF 16V C3 33uF 10V VR2 TI105BX C4 33uF 10V R2 2.7K U1 LM13700N U2 TLC27M4CN U3 LM392N D8 1N4148 D9 1N4148 D10 1N4004 C18 .47uF R1 1K +5V R23 20K 6 +5V 4 11 8 4 +5V Shield +2.5V 1M Discrimination Ground Compensation
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Fisher
Transcript of Fisher 1212 x
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ReceiveCoil
+2.5V
+2.5V
+2.5V
+2.5V+2.5V
+2.5V+2.5V
+5V +5V +8V
White
Green
Black
Red
TransmitCoil
+5V
9V
VR1
LM2931
+5V
+2.5V
+8V
Fisher 1212XTraced from PCBby Rodney GrayOrig. 1992Revd. 10/31/06
+5V
C7.22uF
R610K
R31K
R449.9 ohm
Q22N4403
R53.92K
C5.22uF
Part ofU1
7
8
11
C84700pF
C9.1uF
R81K U1
4
3
5
1
R1120K
C11.22uF
R1349.9K
D11N4148
D21N4148
C13.47uF
R910K
R1020K
C102200pF
R72.7K
C15.022uF
R151M
D41N457
D31N457
R212.7M
C1922pF
R16560
R1710K
C16.022uF
R181M
U1
U2
U2
U2
U2
U3
U3
R2220K
R2049.9k
C2022pF
D51N457
D61N457
D71N457
Part ofU1
11
10
9
R2875K
5
6
7
R306.8K
C2222pF
R32100K
R311K
C23.01uF
Q3MPS A13
Q12N4403
C2100uF10V
SP116 ohm
R35100 ohm
C211800pF
R2575K
D111N4148
R241M
3
2
1
R27270K
R26270K
8
9
10
5
6
7
R1449.9K
C14.47uF
14
13
12
R1220K
C12.22uF
16
3
2
1
13
12
14
C11000uF16V
C333uF10V
VR2TI105BX
C433uF10V
R22.7K
U1 LM13700NU2 TLC27M4CNU3 LM392N
D81N4148
D91N4148
D101N4004
C18.47uF
R11K
+5V
R2320K
6+5V
4
11 8
4
+5V
Shield
+2.5V
1M
Discrimination
GroundCompensation
