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COMMANDER 300
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G-6
ELECTRICAL DIAGRAMS
G-6
SCHEMATIC - ENGINE PROTECTION PC BOARD
S15018-13
IDLER
12 SEC. TIMER
F
+10V
+10V
16
4536B
8
D
C
DECODE
B
A
Vss
OSC INH
SET
RESET
IN 1
OUT 1
OUT 2
8 BY-PASS
CLOCK INH
MONO IN
Vdd
X9
1
6
3
11
10
2
13
14
5
12
7
9
4
15
X12
14
8
9
10.0K
R124
4093B
X11
1
13
12
11
D44
D43
D38
X11
6
5
4
X11
1
2
3
13.7K
R144
D45
100V
.047
C51
D54
20.0K
R114
33.2K
R145
X11
9
8
10
COM
COM
COM
1400V
.0047
C12
COM
COM
+12V
COM
1.00K
R5
+10V
+10V CRANK
CONTROL SWITCH
+10V
1400V
.0047
C41
X10
14
8
9
COM
+10V
+10V
COM
COM
+10V
+10V
+10V
COM
B
RUN STOP SWITCH
STOP
RUN
+12V BATT
SWITCH
HARRIS #V24ZA50
5J
234A
TO OIL PRESS.
232D
C
229A
233A
SWITCH
TO OIL TEMP.
TO WELDING TERMINAL
J7
11
1.00K
R22
D2
J7
13
50V
0.1
C23
D8
D5
10.0K
R7
C16
X10
13
10
11
500
50V
C18
10.0K
R6
10.0K
R9
10.0K
R8
50V
0.1
C15
5W
10
R12
10.0K
R20
10.0K
R23
10.0K
R24
C24
10.0K
R21
J6
5
J7
9
J6
1
5W
270
R152
5W
270
R151
+
t
56
R149
+
t
56
R150
J6
2
1N4007
D47
J7
6
1N4007
D34
256
260
261
4B
CURRENT SENSE
108
FROM CONTROL BD
IDLER SWITCH
109
248
2B
AUX CURRENT SENSING
110
Q1
2N4401
10.0K
R27
D31
D14
1400V
.0047
C37
50V
0.1
C26
D35
200
R108
D33
200
R100
200
R102
200
R107
200
R106
200
R103
200
R104
1N4007
D36
J7
15
J7
10
200
R132
J5
4
J6
6
J5
1
J5
2
D30
50V
50
C42
D24
C30
10.0K
R64
47.5K
R122
10.0K
R48
-D
+10V
X7
1
2
3
X7
4
5
6
X7
9
10
8
+10V
1W
20V
DZ2
10.0K
R78
I3
I1
I0
O0
O3
O2
O1
MC1413BP
O6
O4
I6
GND
I4
O5
I5
I2
CLAMP
X6
4
7
6
1
2
15
11
12
3
9
10
13
14
5
16
8
+10V
+10V
+5V
COM
LM2901
10.0K
R140
1W
20V
DZ7
1W
20V
DZ4
X1
14
8
9
LM2901
IDLE
SOLENOID DRIVE
10.0K
R134
C49
Q12
2N4401
4.75K
R33
18
15V
C28
7.68K
R40
-B
LM2901
10.0K
R63
133K
R123
X1
1
6
7
X1
2
4
5
+10V
-A
10.0K
R137
LAMP DRIVER
LM2901
10.0K
R139
10.0K
R143
74HC132
X7
s17900-24
1
12
13
11
20.0K
R136
COM
2.43K
R109
CNY17-3
OCI1
42
1
6
5
50V
0.1
C39
1W
15V
DZ6
1N4007
D13
1N4007
D53
2.21K
R162
OIL TEMP.
D55
2.00K
R160
50V
0.1
C25
7.68K
R127
10.0K
R118
OIL PRESSURE
FUEL
X10
1
6
7
15.0K
R131
100K
R126
50V
0.1
C22
43.2K
R128
C48
C43
+10V
CTL +12V
CTL +12V
COM
COM
+5V
+10V
COM
COM
CTL COM
CTL COM
+10V
+10V
COM
COM
+10V
COM
1.0A
30V
D58
681K
R26
D56
5W
50
R93
267
R41
267
R96
J7
1
J7
3
267
R42
267
R90
267
R43
267
R88
267
R44
267
R91
J7
4
J7
2
5W
50
R89
1W
20V
DZ3
D27
10.0
R92
D28
8A
150V
Q9
-C
10.0K
R36
C36
X12
2
4
5
5W
2.7
R98
4.75K
R35
200
R47
10.0K
R37
22.1K
R45
D26
18
15V
C27
X1
13
10
11
D16
300V
500mA
Q2
6.19K
R39
100
R95
47.5K
R38
D46
133K
R31
D17
Q13
2N4401
1W
15V
DZ8
20.0K
R32
100
R115
.5
5W
R94
Q14
2N4403
J6
12
D
G
S
15A
60V
Q8
3
1
2
J7
7
J6
3
J6
7
+12V
COM
COM
+12V
+10V
+10V
+10V
J6
10
FUEL LVL LAMP
OIL TEMP LAMP
OIL PRES LAMP
ALT VOLTS LAMP
243
SOLENOID
200
226
IDLE
262A
DOWN
+ HOUR METER
224A
263
264
WITH HEATSINK
- HOUR METER
SOLENOID
SHUT
281A
TO ROTOR
247
246
ENGINE ALT FLASHING
245
237
D25
1N5406
+12V
Q6
2N4403
POWER SUPPLY SOURCE POINT
MFD
3003
EARTH GROUND CONNECTION
G
FRAME CONNECTION
SUPPLY
1
COMMON CONNECTION
X-C-
VOLTAGE NET
Q-
OCI-
DZ-
12
D-
LAST NO. USED
LABELS
DIODES =
RESISTORS = Ohms (
CAPACITORS =
1A, 400V
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
(
(UNLESS OTHERWISE SPECIFIED)
1/4W
.022/50V
R-
UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
58
FILENAME: G3003_1CA
D
E
10.0K
C11
C8
LM2901
X10
3
12
C9
4093B
X11
14
7
4536B
X9
16
8
15A
600V
D3
100J
18V
TP1
J7
5
J6
8
R3
GND
IN
OUT
X3
100
15V
C14
D4
68.1
R147
68.1
R11
+
t
56
R13
3000V
.0047
C19
1N4007
D6
68.1
R10
X2
TL431
REF
8
1
6
3.32K
R4
100
15V
C17
C13
COM
+12V
COM
COM
COM
+10V
COM
+10V
X12
13
10
11
C21
COM
+5V
+10V
COM
COM
COM
COM
+10V
COM
ALT. VOLTS
S15018-13
LOW FUEL 30 MIN. TIMER
162
18
12
54
+10V
COM
16
4536B
8
D
C
DECODE
B
A
Vss
OSC INH
SET
RESET
IN 1
OUT 1
OUT 2
8 BY-PASS
CLOCK INH
MONO IN
Vdd
X8
1
6
3
11
10
2
13
14
5
12
7
9
4
15
4.7
35V
C33
10.0K
R16
33.2K
R17
10.0K
R125
1N4007
D12
SHUTDOWN
SOLENOID DRIVE
10.0K
R54
100
R50
D20
1N5402
.5
5W
R97
22.1K
R46
G
D
S
15A
60V
Q10
J6
4
J6
9
Q5
2N4401
D22
1W
15V
DZ5
10.0
R62
J6
11
COM
+10V CRANK
COM
+10V
100
R56
2.21K
R161
D32
D29
50V
0.1
C38
1.0A
30V
D57
COM
COM
COM
+10V
+5V
COM
COM
10.0K
R81
+10V
COM
12.1K
R87
39
20V
C4
31.6K
R2
74HC573
X4
20
10
74HC132
X7
14
7
10.0K
R86
X12
S15128-11
1
1
6
7
D1
100K
R1
C7
50V
0.1
C6
COMCOM
NUMBER.
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
NOTES :
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
LAMP FAULT LATCH
5 SEC. TIMER FOR LAMP TEST
10.0K
R79
10.0K
R82
12.1K
R80
D2
Q0
D7
LE
D0
Q2
Q1
D5
D6
Q3
Q4
Q5
Q6
Q7
OE
74HC573
D4
D1
D3
X4
12
1
16
19
2
6
15
9
11
4
8
3
7
5
17
18
13
14
12.1K
R138
12.1K
R142
22.1K
R85
C3
LM2901
X12
3
12
20.0K
R83
10.0K
R84
10.0K
R141
10.0K
R146
R70
4536B
X5
16
8
10.0K
R18
33.2K
R75
C2
LM2901
X1
3
12
C1
4536B
X8
16
8
C32
X10
2
4
5
91
2-4 OPTO INTERFACE
90
15 SEC. TIMER
S15018-13
18.2K
TO CONTROL BOARD
TO ENGINE ALT
TACH SIGNAL POST
239A
A
10.0K
R72
68.1K
R76
C34
J5
6
3.32K
R68
+
t
56
R29
C35
1.00K
R74
C52
J5
3
1N4007
D15
357
R25
D10
5K
CW
R71
16
4536B
8
D
C
DECODE
B
A
Vss
OSC INH
SET
RESET
IN 1
OUT 1
OUT 2
8 BY-PASS
CLOCK INH
MONO IN
Vdd
X5
1
6
3
11
10
2
13
14
5
12
7
9
4
15
C10
4.75K
R77
D41
7.68K
R129
4.7
35V
C46
J7
12
1400V
.0047
C47
7.68K
R130
POST ON FUEL
1N4007
D11
1400V
.0047
C31
J7
14
50V
0.1
C20
221K
R15
1W
6.2V
DZ1
68.1K
R19
1N4007
D52
1N4007
D9
47.5K
R14
COM
1W
5.1V
DZ12
GAUGE
TO SENDER INPUT
5W
10V
DZ11
100
R30
Q18
2N4401
2.00K
R159
4.75K
R73
1N4007
D7
4.75K
R69
1400V
.0047
C54
Q11
2N4401
1.0
35V
C40
1.00K
R101
1.00K
R28
50V
0.1
C53
1-29-99H
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.