Lincoln Electric SVM127-A service manual Meter Board L6687 Schematic, 21145

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G-4 ELECTRICAL DIAGRAMS G-4

METER BOARD (L6687) SCHEMATIC

21145

S

511

512

514

515

SET

ACTUAL

510A

510B

513

C3

C1

516

C2

9

12

1

4

5

8

10

HI

IN/MIN

TO DIGITAL METER

10 VAC

2

3

M/MIN

6

11

LO

7

VOLTS

518

562

TP4

510C

510

+5V

+5V

A

3

4

E

C

2

1

B

D

5

561

560

517

518

562

510

510C

6

3

4

10

8

2

1

7

9

5

602

601

B8

B7

B5

B6

B9

B2

B3

B4

B1

J14

J14

J14

J14

J14

J14

J14

J14

J14

J14

D1

R8

102K

R6

7.68K

R1

24.3K

D5

C7

C4

TP5

CW

CW

CW

R9

R7

D2

10K

1K

R2

2K

OUT

X1

IN

C1

C2

500

4.7

50V

35V

C3

GND

D3

27

R3

2.8K

10V

TP4

D4

NOTES :

GENERAL INFORMATION

LABELS

FILE: S21145_1CA

N.A.

SINCE COMPONENTS OR CIRCUITRY ON

A PRINTED

ELECTRICAL SYMBOLS PER E1537

CIRCUIT BOARD

MAY CHANGE

WITHOUT AFFECTING

SUPPLY

VOLTAGE NET

FRAME CONNECTION

THE INTERCHANGEABILITY

OF A COMPLETE

BOARD.

CAPACITORS =

MFD ( .022/50V

UNLESS OTHERWISE SPECIFIED)

POWER SUPPLY SOURCE POINT

THIS DIAGRAM MAY NOT

SHOW THE EXACT COMPONENTS

RESISTORS = Ohms (

1/4W UNLESS OTHERWISE SPECIFIED)

EARTH GROUND CONNECTION

OR CIRCUITRY OF

CONTROLS HAVING A COMMON

CODE NUMBER.

DIODES =

1A, 400V

(UNLESS OTHERWISE SPECIFIED)

COMMON CONNECTION

UNLESS OTHERWISE SPECIFIED TOLERANCE

Ch'ge.Sht.No.

THE LINCOLN ELECTRIC CO.

EQUIP.

LN-9 & LN-9F (METRIC)

ON HOLES SIZES PER E-2056

3-25-94

TYPE

ON 2 PLACE DECIMALS IS + .O2

CLEVELAND, OHIO U.S.A.

METER BOARD SCHEMATIC

ON 3 PLACE DECIMALS IS + .OO2

SUBJECT

ON ALL ANGLES IS + .5 OF A DEGREE

NONE

SCALE

MATERIAL TOLERANCE ("t") TO AGREE

SHT.

S 21145

FM

9-24-93

WITH PUBLISHED STANDARDS

DR.

DATE

CHK.

SUP'S'D'G.

NO.

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 provided 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.	LN-9