Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 162

G-16
pC bOarD aSSEmbLy - CONTrOL pC bOarD (G2512)
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. individual printed Circuit board Components are not available from Lincoln Electric. This information is pro-
vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the
machine.
ELECTriCaL DiaGramS
G2512
ITEM REQ'D. IDENTIFICATION
C1,C25‐C29,C31‐C36,C56,C69,C100‐C131 46 0.1 / 50
C37,C39,C43 3 150 / 50
C38,C40,C44,C66,C67,C68 6 4.7 / 35
C42,C45 2 .33 / 50
C46,C47,C48,C55,C58,C59,C61,C62,C132 9 .022 / 50
3 18 / 15
C49,C51,C72
C50,C54,C57 3 2700pf / 50
C52,C53,C71 .02 / 600
3
C63,C64 2 10pf / 100
C65 1 27 / 10
C73,C74 2 150pf / 100
D1 thru D29,
96 1N4004
D31 thru D97
OCI1,OCI3,OCI4 3
Q1 thru Q5,Q7,Q9,Q10,Q11 9
Q6,Q8 2
56, 20%
PTC1,PTC2 2
R1,R4,R7,R12,R14,R17,R18,R21,
R28,R31,R33,R41,R42,R43,R60,
21 4.75 K 1/4W
R63,R73,R126,R127,R131,R161
R2,R3,R5,R6,R10,R15,R16,R19,
R20,R23,R24,R29,R35,R36,R39,
R51,R53,R68,R71,R72,R75,R80,
10K 1/4 W
41
R96,R98,R100,R102,R104,R106,R108,
R110,R112,R114,R116,R121,R122,R123,
R130,R133,R149,R156,R159
R8,R9,R66,R67,R152,R153 6 3.01 K 1/4W
R11,R13,R32 3
680 1W
R22,R50,R65,R70,R117 5 1.5 K 1/4W
R25 1 22.1 K 1/4W
R26 1 30.1 K 1/4W
R27,R54,R79 681 K 1/4W
3
R30 1 68.1 K 1/4W
R34,R40,R52,R76,R139,R146,R157,R158,R162 9 1 K 1/4W
R37,R148 2 51.1 K 1/4W
R38 1 9.09 K 1/4W
R46 1 1 M 1/4W
150 K 1/4W
R48 1
R49,R55,R138,R140,R151 5 475 1/4W
681 1/4W
R56,R150 2
R57 1.82 K 1/4W
1
R58 1 3.32 K 1/4W
1 2.43 K 1/4W
R59
R61 1 332 1/4W
R62 1 243 1/4W
R64,R69,R125,R142 4 267 1/4W
R74,R81,R82,R83,R84,R85,R86,
R87,R88,R89,R90,R92,R93,R94,
R95,R97,R99,R101,R103,R105, 100 1/4W
32
R107,R109,R111,R113,R115,R118,
R119,R120,R134,R135,R136,R160
R78,R124 2 47.5 K 1/4W
R91 1 16.2 K 1/4W
10K 10T
R128 1
R129,R154 2 1K 1T
R132,R137,R144 3 500 10T
R141,R155 100 K 1/4W
2
X1 1 VOLTAGE REG
X2 1 BINARY COUNTER, 4 STAGE
X3,X23 HC08A AND GATE
2
X4 1 IC‐CMOS,MCU,DSP,320
X5 1 ROM ASBLY
X6 1 ROM ASBLY
X7,X10 2 12 STAGE BINARY COUNTER
X11,X12,X40,X42 4 HC373A LATCH 3 STATE
X13,X14 2 HC259 DECODER
X15,X21,X22 3 8 BIT SHIFT REG
X16 1 8‐BIT MPU D/A
X17,X18 HC4351 8 CHAN ANALOG MUX
2
X19,X24 2 HC109 FLIP FLOP
X20,X38 2 2 INPUT NAND GATE QUAD
X25 NPN DARLINGTON ARRAY
X26 1 1 224N QUAD OP AMP
X27 1 OP‐27GZ OP AMP
X28,X29,X31 3 33074A OP AMP
X30 HC4066
X32 1 1 HC04A INVERTER
X33 1
431 I VOLT REF
X34 1 AC04 INVERTER
1
X35 AC139 DECODER
X36 1 AC373 3 STATE LATCH
AC138 DECODER
X37 1
X39,X41 2 HC74 FLIP FLOP
Y1 1 19.66 mHz.
SQUarE WaVE TiG 355
G-16