Lincoln Electric COMMANDER SVM145-B Service Manual page 171

G-10
SCHEMATIC - METER PC BOARD
TEST 7 10.0K
J8
102
R98
1
77
C31
C24
0.1
0.1
50V
50V
TEST 8 CTL COM
10.0K
J8
104
2 R120
76
C34
C23
0.1
0.1
50V
50V
TEST 9 CTL COM
10.0K
J8
103
3 R126
75
C37 C30
0.1 0.1
50V 50V
CTL COM
CURRENT TEST 10
100K
J8
101
R146
4
C38 C27
0.1 1.0
50V 35V
CTL COM
VOLTAGE TEST 11
100K
J8
5 R147
105
C44
C25
0.1 1.0
50V 35V
CTL COM
CTL +12V
10.0K
R106
CTL COM
1.00M
R75
Y1
C20
C19
4.0MHz
22p
22p
130
100V
100V
COM
LED BUS
LED1_LE
LED2_LE
LED3_LE
LED4_LE
LED5_LE
LED6_LE
10.0K
RUN STOP SWITCH
STOP
J9
232
+12V BATT 1
RUN
TP1
18V
100J
J9
5L
2
ELECTRICAL DIAGRAMS
A/D CTL LINE CS +5V CTL+5V A/D CTL LINE DIN +5V CTL+5V
C13
0.1
50V
OCI2
OCI1 2 8
2 8 7 6
Q6
Q7 NC NC
NC NC
3 1
2N4403
3 1 4 5
2N4403
CTL COM
COM
CTL COM
COM
20
1
AN0 Vdd
2 AN1 X10 EOC 19
3 18
AN2 Sclk
CTL+5V
4 17
AN3 Din
5 AN4 Dout 16
6 15
AN5 /CS
1.00K
7 AN6 Vref 14
R69
8 13
AN7 VAG
A/D CONVERSION
C14
9 12 C15
AN8 AN10
0.1 0.1 4.75K
10
Vss MC145051 AN9 11
50V 50V
10.0K
CTL COM +5V
+5V
4.75K
100K C2 1
R48 A0
0.1
C32 4.75K 2
A1
50V R47
0.1
Vdd
3
1.00K A2
50V R46
X2
RES
4 GND
R58
S-8054HN 24C01A
C11
COM
Vss
0.1 m15104-13
+5V
50V
SERIAL EEPROM
4.75K
COM
4.75K 4.75K
X13
28
2 1
/IRQ Vdd A!
15 11 2 A2
VRH/PC4 PB5/SDO
1 13 8
/RESET PB7/SCK CLK
27 12 9 R
OSC1 PB6/SDI
26 OSC2 X1 PA2 8 13 QH
A/D LINE DATA OUT
74HC164
22 9
PC0 PA1
21 PC1 PA0 10
20 3
PC2 PA7
EEPROM SCL
19 4
AN3/PC3 PA6
EEPROM SDA
18 AN2/PC4 PA5 5
A/D CTL LINE SCK
17 6
AN1/PC5 PA4
A/D CTL LINE DIN
16 AN0/PC6 PA3 7
A/D CTL LINE CS
23 24
PD5 TCMP
20.0
14 Vss 25
PD7/TCAP
A/D LINE EDC
MC68HC705 R55
R74
10.0K 10.0K 10.0K
R73
R56
R82
COM
MICROCONTROLLER & SUPPORT
COM 1.00K
POWER SUPPLIES
150
20.0 20.0
+5V
DZ1 R7 R2
D3
D4 10V
R9 R4
1N5402 5W
R8 R1
R10 R5
C45
.15 DZ2
X4 R6 R3
10V
200V 1.00K
IN OUT
5W
R11
TEST 2
GND
R12
C1 C10 C3 R15
DZ3
1.0 0.1 4.7
10V R13
35V 50V 35V
5W
R17
TEST 1
R14
R16
COM
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
+5V CTL+5V +5V
A/D CTL LINE SCK
A/D LINE DATA OUT
C22
0.1 C26
0.1 +5V
50V
50V
7 6
OCI3
2 8 7 6 6 7 8
4 5
Q5 NC NC NC
C29
3 1 4 5 5 4
2N4403
0.1
50V
CTL COM
COM COM
+5V MTR 1
162
8 3 19 2
Q0 D0
R84
1 74HC573
18 D1 3
Q1
9 2 R85
7
4 17 4
Q2 X8 D2
R86
6
10
6 16 5
Q3 D3
7 R83
1
9 15 Q4 D4 6
LED1 R77
10
4
14 7
Q5 D5
5 R76
5 2 13 Q6 D6 8
R67
hundreds meter 1
12 9
Q7 D7
shown as mirror image R87 OE
LE
of led4
1 11
LED1_LE
+5V MTR 1
+5V
MTR1_OE
162
8 3 19 2
Q0 D0
R88
74HC573
1
10.0K 18 Q1 D1 3
9 2 R89
7
4 17 4
Q2 X7 D2
R90
6
10
6 16 5
Q3 D3
7 R60
1
9 15 Q4 D4 6
LED2 R59
10
4
14 7
Q5 D5
5 R51
8
Vcc 4.75K
X3 5 2 13 Q6 D6 8
R50
7
WP tens meter 1
R45 12 9
Q7 D7
shown as mirror image R91 OE
6 LE
SCL
EEPROM SCL of led5
SDA 5
EEPROM SDA 1 11
LED2_LE
10.0K
+5V MTR 1
MTR1_OE
+5V
162
8 3 19 2
Q0 D0
R92
74HC573
LED BUS 1
18 Q1 D1 3
2
9 R93
7
4 17 4
Q2 X9 D2
QA 3 D0 R94
10 6
6 16 D3 5
D1 Q3
QB 4 7 R53
1
9 15 6
Q4 D4
5 D2
QC LED3 R79
10
4
14 7
Q5 D5
QD 6 D3 5 R78
5 2 13 Q6 D6 8
10 D4
QE R52
ones meter 1
12 9
Q7 D7
QF 11 D5 shown as mirror image R95
OE
LE
of led6
D6
QG 12
1 11
LED3_LE
D7
MTR1_OE
MTR2_OE
MTR1_OE
LED BUS R33
D2
15.0
+5V MTR 2
20.0 Q2 R34
3A CTL +12V
15.0
R41
100V
X6
R36
R38
IN OUT TEST 4
15.0
R42
C7 C8
R37 0.1
R40 C9 GND
4.7
1.0 50V
R39 15.0 35V
35V
R35
DZ5
10V
15.0
COM
1W
COM
D1
+5V MTR 1
R19
15.0
TEST 3
X5
R21
IN OUT
15.0
C4 C5
R18
C6 GND 0.1 4.7
Q1
1.0 50V 35V
3A 15.0
35V
100V
R20
15.0
COM
R22
15.0
28
C17 C16 C33 C43
X1
DZ4
1.0 0.1 MC68HC705 .022 74HC164
10V
35V 50V 50V
1W
14
COM
SPARE COMPONENTS
CTL+5V +5V CTL+5V J9
3
A/D LINE EDC
+5V
OCI4
OCI5
2
6 7 8 2
Q3
NC Q4
NC NC
1 3 C36
2N4403
5 4 1 3
2N4403
0.1
50V
CTL COM
CTL COM
COM
+5V MTR 2
LED BUS
162
D0 D0 2 19 3 8
D0 Q0
R134
74HC573 1
D1 D1 3 D1 18
Q1
R135 2 9
7
D2 D2 4 17 4
D2 X12 Q2
R136 6
6
10
D3 D3 5 16
D3 Q3
R128 7
1
D4 D4
6 D4 Q4 15 9
R125 LED4 4
10
D5 D5 7 14
D5 Q5
R124 5
D6 D6
8 D6 Q6 13 2 5
R119
D7 D7 9 12
D7 Q7 hundreds meter 2
OE R137
LE
11 1
LED4_LE
+5V MTR 2
MTR2_OE
162
D0 D0 2 19 3 8
D0 Q0
R138
74HC573
1
D1 D1
3 D1 Q1 18
R139 2 9
7
D2 D2 4 17 4
D2 X11 Q2
R140 6
6
10
D3 D3 5 16
D3 Q3
R114 7
1
D4 D4
6 D4 Q4 15 9
R113 LED5 4
10
D5 D5 7 14
D5 Q5
R110 5
D6 D6
8 D6 Q6 13 2 5
R109
D7 D7 9 12
D7 Q7 tens meter 2
OE R141
LE
11 1
LED5_LE
+5V MTR 2
MTR2_OE
162
D0 D0 2 19 3 8
D0 Q0
R142
74HC573
1
D1 D1
3 D1 Q1 18
2
R143 9
7
D2 D2 4 17 4
D2 X14 Q2
R144 6
6 10
D3 D3 5 D3 16
Q3
R116 7
1
D4 D4 6 15 9
D4 Q4
R130 LED6 4
10
D5 D5 7 14
D5 Q5
R129 5
D6 D6
8 D6 Q6 13 2 5
R115
ones meter 2
D7 D7 9 12
D7 Q7
R145
OE
LE
11 1
LED6_LE
MTR2_OE
LED1_LE
LED2_LE
LED3_LE
LED4_LE
LED5_LE
LED6_LE
MTR1_OE
MTR2_OE
LED BUS
10.0K
CTL+5V
R150
301 COM CTL+5V
TEST 5
R151
301
R152
10.0K
CTL +12V
301 C39
C40
1
0.1 4.7
X15
8 50V 35V
C18
J9
REF
TL431
106
4
6
C42 C41 MC145051
10.0K
39 0.1
TEST 6 J9
20V 50V
107 5
CTL COM CTL COM
+5V
CTL COM
ISO +12V FROM CONTROL PCB
14 20 20 20 20
C12 C21 C28
X13 X7 X8 X9 X11
0.1
50V
0.1 0.1
74HC573 74HC573 74HC573 74HC573
50V 50V
7 10 10 10 10
COM
G-10
20
X10
10
20 20
C35
X12 X14
0.1
50V
74HC573 74HC573
10 10
COMMANDER 300