1 2 3 4 5 6 7 8

+5V
C3
+12V
+12V +5V 0.01uF
FISHFINDER
C1
INTERFACE CN1 0.1uF
C2 R1 +5V
10uF 10K R2 +12V
1
+12V U3 10K-1% U1
2
+12V 16 VDD VREF 1 C87 8 VI C+ 2
3 C4
0.1uF

8
+12V FF_AD_CVT_N 15 CVT CREF 2
4 10uF/16V(AL)
+12V FF_AD_SCLK 14 SCLK VIN1 3 TEMP 3 +
5 R5
+5V FF_AD_DIN 13 DIN AGND 4 1 GAIN_L C- 4
6 TP1
GND FF_AD_DOUT 12 5 SIG_50K C9 2 - 6 LV
7 DOUT VIN2 100-1% -5V
GND 11 RFS VIN3 6 SIG_200K 1000pF C11 7 OSC VO 5
8 TEMP U4/A

4
TEMP 10 7 0.01uF 1 NC
9 FF_CLK+ TFS VIN4 LM358A GND 3 +12V
C10
FF_CLK+ 9 DGND A0 8
10 FF_CLK- 10uF/16V(AL)
FF_CLK- ICL7660
11 TRIG
TRIG AD7811 R8
12 FF_AD_SCLK
D FF_AD_SCLK
FF_AD_DOUT
3K-1% R10 R11 -5V
R27
D
13 33K-1% 47K-1% TP3
FF_AD_DOUT
14 FF_AD_DIN 4.7K
FF_AD_DIN TRIG

8
15 FF_AD_CVT_N
FF_AD_CVT_N
FF_DA_SYNC_N

3
16 5 +
DA_SYNC_N R18
17 FF_DA_DIN TRIG TRIG 7 STC_L TRIG 2 Q1
DA_DIN
18 FF_DA_SCLK C17 6 - KRC101S
DA_SCLK 100-1%
19 1000pF C18
GND +5V U4/B R30 +8V-50K R31 +8V-200K

4
0.01uF

1
20
GND LM358A 4.7K 4.7K
HIF3FB-20PA-2.54DSA +5V
STC_H

3
STC_L 2 Q2 2 Q3
U7 R25 R26
KTC3875 KTC3875
6 VDD A6 1 33K-1% 47K-1%
R21 R22 R23 R24 +12V R32

1
+8V-50K R33

1
+8V-200K
W6 2
6.8K 6.8K 6.8K 6.8K 3K 3K
B6 3
C88 Q4 Q5

3
C21 C22 4 GND A5 12 Q7
0.1uF KTC3875 Q6 KTC3875

8
2 2
0.1uF 10uF 9 VSS 11 KTC3875
W5 KTC3875

3
3 +
B5 10 R28 R37 C28 C29 R38

1
1 GAIN_H 2 2
22 C26 C27 0.1uF 1uF/16V(T)
A4 C23 2 - 10 10
W4 23 100-1% 0.1uF 1uF/16V(T)
R29 1000pF C24

1
24 U8/A C34
10K B4

4
0.01uF R43 R44
A3 15 LM358A 4.7uF/16V(T)
180K 180K
W3 14 R45 C31 R48 C33
C32 R46 R47 R49 R50
FF_DA_SYNC_N 5 CS 13 10K 10K 47uF/16V(T)
B3 4.7K 22K 4.7K 22K

1
FF_DA_DIN 7 SDI A2 19
R34 R35 2 VR2 2 VR3
FF_DA_SCLK 8 CLK 20 47uF/16V(T)
W2 33K-1% 47K-1% 50 TP9 50
B2 21 4.7uF/16V(T) TP10

3
STC_L

3
STC_H

8
A1 18
W1 17 5 +
R36
16 7 STC_H
B1
R39 R40 R41 R42 C25 6 -
100-1%
AD5206BR50 3.9K 3.9K 3.9K 3.9K 1000pF C30

4
U8/B 0.01uF

1
LM358A 2 VR4 2 VR5
TP7 TP8
10K 10K
GAIN_L GAIN_H

3
R51 R52 VR6

2
33K-1% 47K-1% 10K
GAIN_H 1 3
SIG_200K
C SIG_50K
GAIN_L 1 3 C
VR7

2
10K
+12V +6V-50K
U15 TP11
+8V-50K +6V-50K
78L06 50K-IF3
3 I O 1
2 GND

TP13
C83 C82 C35
C37 C38 TP12 C36
100uF/16V(AL) 100uF/16V(AL) 50KHz 0.1uF R94 R64
0.1uF 0.1uF 50K-IF2 0.1uF
U9/A 0 C39 0
U9/B R54 R55
8

LM358A TP14 0.1uF U10 C40

R56 D3 LM358A 5.6K 5.6K

8
+ 3 50K-IF4 MC1350 T1 470pF/50V(MLCC) TP15 U11
1 R57 1N4148 C77
+12V +8V-50K + 5 C42 T2 50K-IF1 MC1350 D5
R58 0.0047uF/1000V

2
U16 - 2 7
T3 0.0047uF/50V 6 1 6 1
T4 SFPL-64
2.2K

2
78L08 C48 - 6 6 1 8 6 6 1
R62
4

10K 5 5 2 5 2 R60 8 6
3 I O 1
0.001uF
1.8K C47

4
150K C41 5 2 1 4 10K 5 R83 5 2
2 GND

C81
47pF 0.01uF 7 4 3 4 3 1 4 15K
0.0047uF/1000V
C45 C56 R65

3
4 3 7 4 3
C51 C52 D6 50T3 R59 C78 50T3
100uF/16V(AL) 100uF/16V(AL) 100K C44

3
0.1uF 0.1uF 1N4148 50T3 R61 C50 5.6K 470pF/50V(MLCC) C91 50T3 D4
C49 0.0047uF/50V(MLCC)
10K 1uF/16V(T) C43 0.0015uF/50V(MLCC) SFPL-64
R63 0.1uF
0.0047uF/50V(MLCC)
C46 R53 R66 R67 100K R68 C53
C54
0.01uF 100 C89 10K 10K 10K 0.01uF
0.0047uF
0.1uF

50KHz -5V

+6V-200K TP16
+8V-200K
200K-IF3
+12V +6V-200K C55
U17
78L06
3 I O 1
TP18 0.1uF C58
C57
2 GND

R95 TP17 R78 0.1uF

200KHz U12/A 0.1uF
0 200K-IF2 0
C59 C70 LM358A U12/B
8

C62 C67 TP19

100uF/16V(AL) 100uF/16V(AL) D7 LM358A U13 C60
8

0.1uF 0.1uF + 3 200K-IF4 TP20

1 R71 1N4148 + 5
MC1350 100pF/50V(MLCC) T6 U14
C63 T5 200K-IF1 C92 D9 C93
R72 MC1350 T8

2
R70 - 2 7
T7 0.0015uF/50V(MLCC) 6 1 6 1
560pF/50V(MLCC) SFPL-64 0.001uF/1000V
B B

2
2.2K C68 - 6 6 1 8 6 6 1
+12V +8V-200K R76
4

10K 5 5 2 5 2 R74 8 6
0.001uF
U18 1.8K C69 33K C61 100K R84
4

5 2 1 4 5 5 2
C94
78L08 47pF 0.001uF 7 4 3 4 3 1 4 100K
0.001uF/1000V
R79

3
3 I O 1 4 3 7 4 3
D10 200T3 R73 C79 200T3
2 GND

100K C65

3
1N4148 200T3 R75 18K 100pF/50V(MLCC) 200T3 D8
C71 C72 0.0015uF/50V(MLCC)
C73 C85 10K C64 SFPL-64
C74 C84 R77 0.1uF 1uF/16V(T)
100uF/16V(AL) 100uF/16V(AL) 0.0015uF/50V(MLCC)
0.1uF 0.1uF C66 R69 R80 R81 100K R82 C75
0.01uF 100 C86 10K 10K 10K 0.0047uF
0.1uF C76
0.0047uF
-5V
200KHz
+12V

TP22
D11 1
COM
R93 SFPL-64
100/0.5w
D12 R100 R101
+12V CN2 T9
SFPL-64 2.2K/1W 2.2K/1W
1 F604-T9(F606-T9)
C95 CN4
+5V 2 1 10
100uF/16V(AL) C96 1
2 9 TD1
0.1uF 2
R86 Q12 5267-02A 3 8 C97 NC
IF RECERVIER CIRCUIT REPLACED TP21 R104 R85 3
G-1145B 1K KTC4376 470pF/1000V GND
2

3
4 7
T-CLOCK+ 100 100 4
2006.5.11 R96 1 2 Q16 2 Q8 C80 5 6 NC
IF RECERVIER POWER CIRCUIT ADDITION 5
REVISION SUBJECT 2.2K 2SK2837 2SK2837 2.2uF/160V TD2
3

Q10
3

1
FF_CLK+ 2 C19
5267-05A
TX DRIVER CIRCUIT REPLACED KTC3880 D13 2.2uF/160V
D14 R102 R103
3.3K
1

SFPL-64
SFPL-64 2.2K/1W 2.2K/1W
R97
3

1 R88
R106 D15
0.2/1W
Q13 R105 0.2/1W R87 SFPL-64
2

KTA1664 1K 1K

A +12V
R107 R108 R90 A
1K 0.2/1W 1K Title Rev.
+5V
2

1 Q14
R89
0.2/1W NAVIS 5100 GPS PLOTTER
TP23
R91
1K
KTC4376

C
3

T-CLOCK-
R98
2.2K
D16
SFPL-64
G-1145 FISHFINDER BOARD
3

FF_CLK- Q11 APPROVED CHECKED DESIGNED/DROWN Size A2

3

2
KTC3880 1 Q15 2 Q17 2 Q9 Drawing-No.
3.3K
I.S.JUNG
1

KTA1664 2SK2837 2SK2837

R109 R92
R99 SN0506S020
2

100 100
File F:\...\G-1145C\G-1145C.sch Date 2006/11/15 Time 15:58 1 of 1

SAMYUNG ENC CO.,LTD.

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