Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 154

G-8
SChEmaTiC - CONTrOL pC bOarD (a475)
+5V
J9 SWITCH INTERFACE
ARC START 3
10K
475 D20 D22 1.50K
ARC START *
10K
1 5 J11
STICK 3 R101
1.00K C46
24 VAC Input
OCI1 100
CNY17‐3
C51
2 6 4
18
15V
D21 D24 C73
475
150p REMOTE J11
681K 1
50V
J9
SWITCH COMMON
1
+5V
475 D23 D87 1.50K
10K
J11
HF OFF
10K 7 R109
AC MODE
100
24 VAC Input 1.00K
1 5
C62
OCI4
CNY17‐3
J11
HF CONTINUOUS
D88 D89 C72 2 6 4 9
475 18
15V
C74
DC MODE J9 681K 150p
8
50V
J11
SHOW VOLTS
5 R105
100
AMPTROL INTERFACE
J11
SPOT
2
R126
4.75K
A=2.43
+15V 3.32K
+15V
C56
.1
Q10 J11
50V VREF SHOW START CUR R103
600mA 4
40V 100
D85
J9 PTC1 13
REMOTE HI X29
5 R125 R124 R123
Vout=10.2V 14
+ t 267 47.5K 10K D84
J11
56 12 START CUR
6
D86
C52 4.75K
.02
600V
VREF
+15V
J11
PULSE 8 R111
D25
100
D26
J9
REMOTE TAP 10
6 R63 R60
REM CUR
4.75K 4.75K 1.00M X26 8 R61
9 332
C53 D27 J11
D28 CRATER 10
.02 243
600V
+15V ‐15V
J9 PTC2
REMOTE LOW J11
7 SWITCH GND
12
+ t
56 Offset
3.01K Adjust 3.01K
R154
CW
D92 1K D93 J11
+15V 2/4 STEP 11
TP1 2700p
CURRENT TEST 100K
10 R149 50V
C50
10K
R35 R38 R146
51.1K 4.75K 10K 9.09K 1.00K
D14 R36
16.2K
R37 R31 10K
CW
Rectifier
CURRENT FB+ J8 +15V Balance
1 R34 D16 500
Adjust
2
1.00K 10K R39 1K
D15 CW CW
10K 1 6
R128 X29 R129 R41
To Shunt C69
100 3 D17 4.75K X29 7
0.1
50V 1 NULL NULL 8 5
R43
2 INPUT V 7
‐15V CC
J8 X27 4.75K
CURRENT FB‐ 3 INPUT OUT 6
2 R40 4.75K
4
V EE NC 5
1K
OP27
VREF
D94
10
8 1 XA
CURRENT/VOLTAGE FEEDBACK X28 R157
X30
9 1.00K 4 XB
D95
8
XC
ANALOG
11
R48 XD SWITCH
J9 +15V 6 Cctrl
VOLTAGE FB 150K
2 10K
(Electrode 13 Actrl Bctrl
Terminal) 7
GND Dctrl
22.1K
54HC4066
VREF
D9
FB Voltage D18
10
Calibration
CW
8 X32
C71 12 X29 R158 12
.02 9 1.00K
600V 500 X31 14 D19
13
D11
C48
1.50K
‐15V
6
10
R16 X28
8 5
10K R15 10K X31 R17
9 4.75K 4.75K
C47
R19 R20 6
7
10K 10K X31
5
D6
2
R23
VREF
10K X31 1 R24 4.75K D7
3 +5V
D10 10K 51.1K
4.75K
30.1K
2
X28 1 R130
3
10K
68.1K
C49
R29
18
15V 10K D78
+15V
POWER SUPPLY
D3
J13
12
6 R5
14
10K X26 R6
D4
13 10K D83 D82
‐15V
+5V
J13
+UNREG
1
D1
VREF
X1
1 3
IN 7805 OUT
D2
4.75K 2
S18104‐2HS
C42 C43 C44 C132
GND D29 1
.33 2 150 4.7 X26 R3
50V 50V 35V 3 10K
‐UNREG J13
2 C45
D81
.33 R141
4.75K
J13 50V D90
P_GND 100K
5
VREF
4.20V
‐15V +15V
J13
VREF 7
J13
+15V
3
J13
‐15V
4 C38 C26 C27
4 7
150 4.7 0.1 0.1
681 681
C37 50V 35V 50V 50V
X26 X28
X27
R57
LM224 OP27 33074A
1.82K
2.43K C32 C33
+ C39 C40 0.1 0.1
1 11 4
150 4.7 50V 50V
X33 8
C66 50V 35V
REF Reference
4.7 TL431
Voltage
35V ‐ 6
Adjust
CW 500
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTriCaL DiaGramS
+5V
D62 10K POT INTERFACE
+5V J10
PEAK CURRENT
D63 13
D58 10K
AC BALANCE J10
R97 10 R84
+5V 100 100
D59
J10
D70 AFTERFLOW 15
10K
BIT I/O
+5V
D71 J10
PREFLOW R86
3
100
D74 10K
R113 AC MODE 20 J10
+5V 7 3D Vcc STICK FORCE
100 14
DATA[0]
4 2D X11 1Q 2
D75
3 5 DATA[1]
1D 2Q
10K 8 6 DATA[2]
D66 4D 3Q
J10
13 5D LATCH 4Q 9 DATA[3] SPOT TIME
4 R88
14 6D 5Q 12 DATA[4] 100
+5V DATA[5]
17 7D 6Q 15
18 16 DATA[6]
D67 8D 7Q
54HC373
11 19 DATA[7] START CURRENT J10
D60 10K G 8Q 5
10 GND O CTRL 1
R99
+5V
100 J10
START TIME 6 R92
D61
100
10K
+5V
D64
J10
PULSE FREQUENCY
7
+5V
D65
D68 10K
J10
BACKGROUND
8 R94
20 100
R107 11 G Vcc
+5V ARC START * 13 2 DATA[8]
100 5D X12 1Q
D69
3 1D 2Q 5 DATA[9]
J10
10K 4 2D 3Q 6 DATA[10] PULSE %
9
D72 7 3D LATCH 4Q 9 DATA[11]
DATA[12]
8 4D 5Q 12
14 15 DATA[13]
6D 6Q
+5V
17 7D 7Q 16 DATA[14] CRATER FADE J10
D73 54HC373 12 R83
18 8D 8Q 19 DATA[15]
100
10
D76 GND O CTRL 1
10K
J10
R115 CRATER CURRENT 11
TP1 IP2 B15
3
100
D77
TP1
IP2 B14
2
R118
+5V
100
J10
1 R74
POT REF
100
D96
10K
J10
POT GND 2 R135
R160
100
100
D97
+5V
11
Current Gain
12
Calibration
13
14 D C B A
3 E
SHIFT
4 F REGISTER
5
G
74HC165
FB CURRENT‐>
14
Vcc
YA 2
3
YB
9 NC
YC
YD 10 NC
<‐FULL RANGE CURRENT
5
Logic 0 / A=16
12 1 / A=1
"DATA ENABLE" ‐> *
ADDRESS[0] 3
1D
ADDRESS[1] 4 2D X36
CUR_GAIN
13 ADDRESS[2] 7 3D
(X14 pin12)
8 4D
13
5D
VREF 14
6D
"WRITE ENABLE" ‐> *
17 7D
18 8D
CLKOUT* 11 G 74AC373
D5
10
GND
FB VOLTS
7
R142
267
D8
MAIN PROCESSOR
ADDRESS[0:11]
D12 ADDRESS[0] 2 A0 D0 26
ADDRESS[1] 1 A1 D1 25
ADDRESS[2]
40 A2 D2 24
ADDRESS[3] 39 X4 23
D91 A3 D3
ADDRESS[4] 38 A4 D4 22
ADDRESS[5] 37 A5 D5 21
OVER_VOLT
ADDRESS[6] 36 A6 D6 20
(Powerdown Circuit)
ADDRESS[7]
35 A7 D7 19
ADDRESS[8] 34 11
A8 D8
10 Vss D9 12
30
ADDRESS[9] 29 A9 Vcc
ADDRESS[10] 28 A10 D10 13
ADDRESS[11] uP
27 A11 D11 14
31 15
/WE D12
32 /DEN D13 16
+5V
A/D EOC* ‐>
9 /BIO D14 17
X24pin7 (Fault Detect)
INT 5 /INT D15 18
HARD_RST 4 /RS X1 7
10K
33 8 2
/MEN X2
3 MC CLKOUT 6
AC SYNC‐> Y1
TMS320C10A
1
CLKOUT
(X10,15,37)
CLKOUT*
(X2,21,36)
X34
2 1
+5V "MEMORY ENABLE"
TRIP POINT
+8.4V
10K +8.8V
POWERFAIL* ‐>
D80
+5V
16 14 30 28 28
C100
C101 C108 C127
X2 0.1 X4 X5 X6
X3 0.1 0.1 0.1
50V
54HC08 50V 50V 50V
54HC390 5320C10A 27C64‐90 27C64‐90
8 7 10 14 14
+5V
14 16 16 14 16
C28 C29 C31
4 4 4
0.1 0.1 0.1 C117 C123 C121 C120
50V 50V 50V X20 0.1 X21 0.1 X22 0.1 X23 0.1 X24
X29 X31 54HC00 50V 50V 50V 54HC08 50V
74HC165 74HC165 54HC109
33074A 33074A
C36
7 8 8 7 8
C34 C35 0.1
0.1 0.1 50V
11 11 11
50V 50V
OCV BOOST
3 4 9
X32
8
X3 R73
10
4.75K
STICK 12
11
AC MODE X3 R7
13
VREF 4.75K
20
19 X2 Vcc
18 X1 X 4
X17
D32 17 3
X0 NC
16 X3 NC 14
R81
VREF 1 X4 LTEN 11
100 ANALOG
D33
6 X5 MUX EN1 7
D37 2 X6 EN2 8
5 15 DATA[0]
X7 A DATA[0] 3 20
1D Vcc
VREF 9 Vee B 13 DATA[1]
DATA[1] 4 2D X42 1Q 2
D39 10 GND C 12 DATA[2]
DATA[2] 7 3D 2Q 5
54HC4351
D40 DATA[3]
8 4D 3Q 6
+5V DATA[4]
13 5D 4Q 9
R85 DATA[5] 14 12
VREF 6D 5Q
100 D41 DATA[6] 17 7D 6Q 15
D79 5
D42 DATA[7] 18 8D 7Q 16
SET 6 54HC373
3 /K Q
11 G 8Q 19
4 CLK X19 10
VREF 7 GND O CTRL 1
2
D44 J /Q
4.75K
D34 RST
1 3
R82 DATA[3]
VREF
100 ‐15V X38
14
D36 HARD_RST 1 RESET 1 VCC
D45 2 DATA 1 RESET 2 13
9 20
Vee Vcc 1 2
3 CLOCK 1 DATA 2 12
17 X0 X 4
X18 LED SET *
4 SET 1 CLOCK 2 11
VREF 18 X1 NC 3
D47 5 Q1 SET 2 10
19 X2 NC 14 X39
D48 16 11 NC 6 /Q1 Q2 9
X3 LTEN
7 GND N.C. 8
1 ANALOG 7
R89 X4 EN1 54HC74
MUX
VREF 6 X5 EN2 8
100 D49
2 X6 A 15 DATA[0]
D50
DATA[1]
5 X7 B 13
10 12 DATA[2]
GND C
54HC4351
VREF
D51
1 RESET 1 VCC 14
HARD_RST
D52
2 DATA 1 RESET 2 13
R93 3 CLOCK 1 DATA 2 12
BITS OUT *
VREF 100 4 SET 1 CLOCK 2 11
D53 5 Q1 SET 2 10
X41
D54 NC 6 /Q1 Q2 9
7 GND N.C. 8
5 6 54HC74
X32
VREF
D55
D56
R95
100
VREF
D57
D35
VREF
A/D INTERFACE
D38
D43
100
R87
VREF D46
R90
100
1
R151 CLKOUT*
2
475
R134
VREF +5V 3
100
4
20 20
12 REF+ Vcc 11 G Vcc
5
1 2 3 2 DATA[0]
AG IN D0 1D X40 1Q 6
C1 X16
11 3 4 5 DATA[1]
0.1 REF‐ D1 2D 2Q 7
50V 18 /OFLW D2 4 7 3D 3Q 6 DATA[2]
+5V 8
19 NC D3 5 8 4D 4Q 9 DATA[3]
LATCH
DATA[4]
CLK1 2 CLKOUT 7 MODE D4 14 13 5D 5Q 12
9 6 A/D 15 14 15 DATA[5]
X15 Q H /WR D5 6D 6Q
SS/PL 1 13 16 17 16 DATA[6]
/CS D6 7D 54HC373 7Q
Q 7 8 /RD D7 17 18 8D 8Q 19 DATA[7]
H
10 10
CLK2 15 GND /INT 9 GND O CTRL 1
TLC0820AI
SA 10
6
H
DATA[0:15]
"Select Channel and Convert"
1 16
<‐ A/D EOC* Q12 V CC
2 Q6 X10 Q11 15
3 Q5 Q10 14
TIMER
4 Q7 Q8 13 5
BITS IN* 16 X34
6 Y2a VCC
5 Q4 Q9 12
TP1 RIPPLE
1 select a Y0a 4 9 IP0_STB* 6 11
Q3 COUNTER R
2 5 A/D READ* ‐> 6
A0a X35 Y1a 7 Q2 C 10
20
Vcc 3 A1a Y3a 7 DATA_RD1
8 GND Q1 9
1Q 2 HARD_RST
15 select b Y0b 12 NC 74HC4040
2Q 5
14 A0b Y1b 11
3Q 6
13 A1b Y2b 10 NC NC
9 CLKOUT
4Q 8 9 NC
GND Y3b
12 NC NC 74AC139
5Q
6Q 15 NC
LWE*
7Q 16
16
1 A Vcc
8Q 19 NC X37
2 10
1 B /Y5 IOWR1*
O CTRL A/D SET *
3 14
C /Y1
BITS OUT *
4 /G2A /Y2 13
HARD_RST
LED SET *
5 /G2B /Y3 12
INT
SOFT WATCH * "Watchdog Reset ‐>"
CLKOUT 6 G1 /YO 15
7 11 SOFT ERR* "Software Error Detected"‐> 12
IOWR3* /Y7 /Y4
11
8 /Y6 9 IOWR2* X20
GND 13
74AC138 HARD_RST
+5V
+5V
28
DATA[0] 1 Vpp Vcc
DATA[1] DATA[0] 11 D0 A0 10 ADDRESS[0]
DATA[2] DATA[1] ADDRESS[1]
12 D1 A1 9
X5
DATA[3] DATA[2] 13 8 ADDRESS[2]
D2 A2
DATA[4] DATA[3] 15 D3 A3 7 ADDRESS[3]
DATA[5] DATA[4] 16 D4 A4 6 ADDRESS[4]
DATA[6] DATA[5] 17 D5 A5 5 ADDRESS[5]
DATA[7] DATA[6] ADDRESS[6] 13
18 D6 A6 4 11
X23
DATA[8] DATA[7] 19 EPROM 3 ADDRESS[7] 12
D7 A7 +5V
DATA[9] 26 NC A8 25 ADDRESS[8]
27 /PGM A9 24 ADDRESS[9]
10K
DATA[10] 22 /DE A10 21 ADDRESS[10]
DATA[11] ADDRESS[11]
20 /CE A11 23
TESTCODE *
DATA[12] 14 2
GND A12 4
27C64‐90 TP1
DATA[13]
+5V
DATA[14]
C59
28 Reset Error Counter
DATA[15] 1 Vpp Vcc X32
DATA[8] ADDRESS[0] 9
11 D0 A0 10 8
DATA[9] 12 9 ADDRESS[1]
D1 X6 A1
RESET FREQUENCY
19.6608MHz DATA[10] 13 D2 A2 8 ADDRESS[2]
40 60Hz 34 sec
DATA[11] 15 D3 A3 7 ADDRESS[3]
50Hz 41 sec
DATA[12] 16 D4 A4 6 ADDRESS[4]
DATA[13] ADDRESS[5]
C64 C63 17 D5 A5 5
10p 10p DATA[14] 18 4 ADDRESS[6]
D6 A6
100V 100V
DATA[15] 19 D7 A7 3 ADDRESS[7]
EPROM
9
26 NC A8 25 ADDRESS[8]
DATA[0:15] 8
X20
27 /PGM A9 24 ADDRESS[9] HARD_RST 10
ADDRESS[10]
22 /DE A10 21
20 23 ADDRESS[11]
/CE A11
ADDRESS[0:11]
14 GND A12 2
27C64‐90
AC SYNC "50 or 60 Hz"‐>
"Voltage below trip point"‐>
16 16 20 20 16 16 16 20
C128 C122 C111 C104 C110 C102 C103 C130 C114 C67
X7 X10 X11 X12 X13 X14 X15 X16
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4.7
50V 50V 50V 50V 50V 50V 50V 50V 50V 35V
74HC4040 74HC4040 74HC373 74HC373 54HC259 54HC259 74HC165 TLC0820AI 54HC4351
8 8 10 10 8 8 8 10
14 14 14 16 20 16 14 14
C107
C119 C131 C112 X35 C109 C124 X39 C118
C125 0.1 C126
0.1 X30 0.1 X32 0.1 X34 0.1 X36 X37 0.1 X38 0.1 X40
0.1 50V 0.1
50V 50V 74HC04 50V 74AC04 50V 50V NAND 50V
54HC4066 50V 74AC373 74AC138 50V 54HC74 74HC373
74AC139
7 7 7 8 10 8 7 7
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
UNLESS OTHERWISE SPECIFIED TOLERANCE
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY ON HOLES SIZES PER E‐2056
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE ON 2 PLACE DECIMALS IS + .O2
NUMBER. ON 3 PLACE DECIMALS IS + .OO2
ON ALL ANGLES IS + .5 OF A DEGREE
MATERIAL TOLERANCE ("t") TO AGREE
AUSTRALIA CANADA FRANCE WITH PUBLISHED STANDARDS
G-8
J14
R66 DC RELAY *
6
3.01K
R67
Q9
3.01K
600mA
680
40V 1W
J14 J13
R8 AC RELAY * R11 GAS ON *
7 8
3.01K Q2
R9
R12 600mA
Q1
3.01K 40V 680
600mA 4.75K
1W
40V J13
HI FREQ ON *
R13 9
Q3
R14 600mA
40V
4.75K
BIT I/O
LED/DISPLAY INTERFACE
13 DTIN Vcc 16
J12
1 A0 Q0 4 1 I0 O0 16 GASWAT *
6
X25 J12
2 A1 X13 Q1 5 2 I1 O1 15 HI FREQ *
7
J12
3 A2 Q2 6 3 I2 O2 14 8 ARC *
14 1 OF 8 7 4 13 J12 START *
EN Q3 I3 O3 9
DECODE J12
15 RST Q4 9 5 I4 O4 12 PEAK *
LED 10
J12
12 Q7 Q5 10 6 I5 DRIVER O5 11 BACKGND *
11
8 J12
GND Q6 11 7 I6 O6 10 CRATER *
12
54HC259
8 GND CLAMP 9
MC1413BP
+15V
TP1
OP3 B7
7 J12
LED POWER
5
R162 C25 C68
0.1 4.7
Q11 1.00K 50V 35V
J11
HARD_RST R161 600mA 14
40V
4.75K
AUTO BALANCE
CLKOUT LED
+5V
HARD_RST J11
13
+5V
J12
1 DIPLAY VCC
C65
27
10V J12
DISPLAY GND
2
J12
100 DISPLAY DATA
R119 3
HARD_RST 100 J12
16 DISPLAY CLK
13 DTIN Vcc R120 4
OP2 B8
TP1
CLKOUT 1 A0 Q0 4 8
2 X14 6
+5V A1 Q2
3 A2 Q3 7
1 OF 8
14 EN DECODE Q1 5 J13
OVER_VOLT
R32 10 POWERDOWN
15 RST Q6 11 (Voltage FB)
1W 680 (To Opto‐triac
CUR_GAIN 12 Q7 Q5 10 D13 Q4 Interlock Circuit)
1 2
(X30 Current FB) 8 9 X32 R33 600mA
GND Q4
54HC259 40V
4.75K
10K
5
R75
J14
7 BACKGND CMD
SCR/BACKGND CNTRL 10K X26 R76 4
1 5
6 1K
C61
OCI3
CNY17‐3
R78
2 6 4
47.5K J14
10K D31 BACKGND GND
5
681K
16
CLK Aa Vcc
RSTa CLK Ab 15 +15V
QAa X2 RSTb 14
CLK Ba QAb 13 267
QBa CLK Bb 12
RIPPLE 11
QCa COUNTER QBb CLN
1
QDa QCb 10 Q5
3
51.2 KHZ 20% X3 R65 600mA J14
GND QDb 9 2 SCR CLN *
40V 2
54HC390 1.50K C54
+15V 2700p Q6
8A
50V
150V
C55
267 10K
J14
3 SCR GND
PEN 1.50K
5 Q7
6 J14
R70 600mA 1
4 X3 SCR PEN *
40V
Q8
C57
8A
2700p
150V
50V
+5V C58
10K
11
SET 10
13 /K Q
"25us Timeout" ‐>
12 CLK X19
"Missed Watchdog Reset*"
14 9
J /Q
RST
+5V
15
D_TIMER* TP1
6 FAULT DETECT
5
10K
4
X20
WATCHDOG
5 TP1
6 DISABLE *
10 11 X20 1
X32
3 HARD_RST
2
5 2
X23 3
SET 6
3 /K Q 1
15
4 CLK X24
7 RST 10
2 J /Q 13 /K Q
RST 12
CLK X24 "Multiple Watchdog Resets"
9
1 14
J /Q
SET
"Interrupt uP" X4pin5
+5V 11
11 CLK1 2
10
12 X22 Q H 9 4 8
6 9 X23
13 1 X23
SS/PL 5
14 D C B A Q 7
H
3 E CLK2 15
4 F SA 10
5 G H 6
74HC165 CLKOUT*
11 CLK1 2 HARD_RST
(X20 pins 2,5,10,13;
12 X21 Q H 9
X13,14,24,4,39,41)
13 SS/PL 1
14 D C B A Q 7
H
+5V
3 E CLK2 15
4 F 10
5 G H S A 6
74HC165
16
1 Q12 V CC
2 Q6 X7 Q11 15
3 Q5 Q10 14
4 Q7 Q8 13
5 Q4 Q9 12
6 Q3 R 11
7 Q2 C 10 4
8 Q1 9 6
GND X38 NC
74HC4040 5
9
8 NC
X38
10
13
14 NC
12 X28
11 NC 12
X38
13
3 4 NC
X34
9 8
X34 NC
11 X34 10 NC
20 20 16
C115 C116 C113
X17 X18 X19
0.1 0.1 0.1
50V 50V 50V 13 12 NC
54HC4351 54HC109 X34
10 10 8
A475‐1BB
GENERAL INFORMATION
LAST NO. USED
20 14 20
R‐ _ 162
ELECTRICAL SYMBOLS PER E1537
C106 X41 C129 C105 CAPACITORS = MFD ( .022/50V UNLESS OTHERWISE SPECIFIED) C‐ _ 132
LABELS
0.1 0.1 X42 0.1 RESISTORS = Ohms ( 1/4W UNLESS OTHERWISE SPECIFIED) D‐ _ 97
50V 50V 50V DIODES = 1A, 400V (UNLESS OTHERWISE SPECIFIED)
54HC74 74HC373 74HC373 SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
10 7 10
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
EQUIP.
Ch'ge.Sht.No. THE LINCOLN ELECTRIC CO. SQUARE WAVE 355
TYPE
5‐8‐92E CONTROL SCHEMATIC
CLEVELAND, OHIO U.S.A. SUBJECT
6‐11‐93H NONE
SCALE
DB/MW 9/24/90 SHT. A 475
CHK. SUP'S'D'G.
DR. DATE NO.
SQUarE WaVE TiG 355