TOC

G-8

ELECTRICAL DIAGRAMS

CONTROL CIRCUIT SCHEMATIC

 

G-8

Section

Master

A B C D E F G H

J K L M

B

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1

525

A5H

 

11 12 10

Q207

520

 

 

 

 

 

 

+10.00V

 

6

2

R243

525

 

 

 

 

 

 

 

R201

3

R204

A5H

C204 +

X201

R209

 

 

 

 

 

 

 

 

C217

 

 

 

 

C221

 

 

 

512

R221

 

 

 

 

 

 

9

8

 

-

4

X203

B4E

C208

2

B4J

 

 

 

10

 

A

 

 

 

 

3

 

1 R211

R217

6 -

 

 

 

 

 

 

 

C219

R239

 

R230

 

 

C209

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D206

CW

R229

LO

R238

 

-

4 X204

 

C224

R233

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R235

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6682-2

SHT. NO. L

81

2

3

510

A5H

C214 +

500

A6H

5

4

C202

R203

 

+

 

 

 

 

 

 

 

 

C203

R206

R207

 

7

 

R205

 

 

13

 

 

 

 

C201

+10.00 V

 

 

 

 

 

 

 

 

 

 

REFERENCE

 

 

 

 

 

 

SUPPLY

 

 

 

 

 

 

 

510P

 

 

 

 

 

 

 

 

525

 

 

 

 

525A

 

A5H

 

 

 

 

 

 

 

 

 

 

 

L201

 

 

TO TACH

 

 

 

555

 

PICK-UP

 

 

 

 

 

P.C. BOARD

 

 

 

 

11

X202

 

 

 

+

11

 

 

 

 

D

1

 

 

5

 

 

 

5

+

7

 

 

 

 

 

C218

C212

X203

 

 

 

 

 

 

 

 

 

 

12 2 3

 

4

R210

 

 

 

 

 

CONTROL

C216

CW

500

 

 

 

 

 

AMP

 

C205

R208

CAL

A6H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C206 +

 

 

ACTUAL SPEED BUFFER

 

 

 

 

 

 

 

 

 

 

TACH SIGNAL CONVERTER

 

 

 

511

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FROM OPTION

 

 

 

 

-

X203

B4E

511A

 

 

 

 

 

13

511 B5J

 

 

 

 

SPEED

 

 

 

 

AND

632

B

 

 

 

 

SETTING

12

14

R242

R218

 

 

PROCEDURE

 

 

+

 

 

 

 

PC BOARD

 

 

+

 

 

C213

C228

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E2D

 

 

C215

 

 

 

N.A.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

510P

 

 

 

 

 

 

 

B3C

SET SPEED BUFFER

 

 

 

A

 

 

 

 

 

 

 

 

3

+

1

+

 

 

Q204

C229

 

 

11

 

 

 

R222

CW

 

R226

 

 

 

 

 

 

HI

 

C210

 

 

R231

 

 

 

 

 

 

Q203

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C220

 

 

 

 

 

QU201

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C225

 

 

 

 

D208

 

C223

 

540

A1H

 

 

 

 

 

 

D205

 

 

 

 

 

 

 

 

C211

 

 

 

 

 

 

 

 

R227

R228

R232

C119

 

R234

 

 

 

 

 

 

 

 

 

 

 

 

PT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

101A

 

 

 

 

 

 

 

500

 

N.B

 

 

 

 

 

 

 

 

A6H

 

 

 

 

 

 

 

 

 

 

 

 

ARMATURE FIRING CIRCUIT

DZ203

628

 

D8A

 

 

 

Q205

Q206

R236

DZ202

C227

R237

 

NA-5SCHEMATIC CONTROLCIRCUIT

10-4-

SUP'S'D'G

EQUIP. TYPE

SUBJECT SCALE NONE

REF.

LINCOLN ELECTRIC CO. CLEVELAND, OHIO U.S.A.

DADDATE 7-2-92 CHK

4

L202

510A

511512

B3GB1G

SETACTUAL

S7A

SPEED

SET-ACTUAL

R212

R214

THE

DR

5

6

142T

 

95S

 

 

142

 

 

95

R414

 

R412

 

 

R409

 

 

R407

CW

CAL

CW

CAL

 

CW

CAL

 

CW

R413

R411

 

R408

 

R406

 

 

C407

 

C406

C409

 

C408

 

 

 

 

CAL

C405

57

R405

CW

R404

 

SPEEDMETER

 

 

519

CALIBRATION

 

 

JUMPER

 

 

 

 

 

 

 

 

57F

 

 

 

 

R402

 

 

 

CAL

CW

CAL

 

 

R401

 

 

 

 

 

 

 

C404

4

 

 

 

 

DM401

 

TP4

 

 

 

 

R403

C403

E

C

 

 

 

 

 

 

 

R410

 

 

510P

 

 

 

 

B3C

 

 

 

TP5

1 +5V

 

 

 

2

X401

 

 

 

 

 

OUT

IN

 

 

GND

 

 

 

 

D401

 

+

 

+

 

C402

 

 

C401

D403

 

 

D404

 

 

510

 

 

 

C7E

 

D402

601A6E

602A6E

512

 

 

 

 

 

 

 

FAST-SLOW

 

 

 

 

 

R240

 

 

-

 

 

 

 

-

 

 

 

 

 

8

 

 

ACCELER

 

 

8 D204

B1G

 

 

9

 

 

9

B

 

 

 

10

C

 

 

 

JUMPER

10

 

 

 

 

 

+

X203

R219

PIN

 

+

X204

 

 

525

 

 

PIN

 

 

 

R225

 

 

 

 

 

 

 

 

511

 

 

 

 

F

S

 

 

 

R241

A5H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

525

 

 

 

 

 

 

 

CW

 

 

 

 

B3G

 

 

 

 

 

 

 

 

 

A5H

 

 

 

 

 

 

R220

 

 

 

 

 

 

 

 

 

Q201

 

ACC

 

R223

 

 

 

 

 

D202

 

 

 

 

 

DZ201

 

 

 

R213

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C207

 

 

 

 

Q202

 

 

 

 

 

 

 

 

 

 

R224

C222

 

 

R215

C226

R216

 

 

 

 

 

 

 

 

 

D203

 

 

 

 

D201

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500

FEED

586

 

 

 

 

 

 

 

 

 

 

A6H

 

 

 

 

 

 

 

 

 

 

 

 

No.

 

 

 

 

SPECIFIED TOLERANCECh'ge. Sht.

9-11-90D

19-7-91J

15-5-92N

10-7-92A

PER E2056

DECIMALS IS .02 DECIMALS IS .002 IS .5 OF A DEGREE 92B3-6-

TOLERANCE t(" ") TO AGREE

PUBLISHED STANDARDS.

7

 

 

 

 

 

 

 

SPEEDMETER

 

SPEEDMETER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

 

CONTROL P.C. BOARD

 

 

 

 

TACHOMETER P.C. BOARD

SPEEDMETER P.C. BOARD

 

C201

.022/25

DZ201

6.8 V., 1 2/ W.

R201

1K

R227

6.8K

OCI301

OPTO-INTERRUPTER

C401

500/50

 

C202

.022/25

DZ202

16.0 V., 1 W.

R203

500 TRIMMER

R228

10K

 

 

C402

4.7/35

 

C203

18/15

DZ203

3.0 V., 1 W.

R204

1.00K, 1/4W, 1%

R229

20K TRIMMER

Q301

2N4123

C403

.022/25

 

C204

4.7/35

 

 

R205

2.94K, 1.4W, 1%

R230

27K

 

 

THRU

 

C205

.0033/200

L201

330 uH, 110mA

R206

15K

R231

15

R301

1K

C409

 

 

C206

.47/50

L202

R207

10K

R232

100

R302

15K

D401

 

 

 

 

 

C207

18/15

 

 

R208

100K TRIMMER

R233

6.8K

R304

1.3K

D402

1A, 400V

 

C208

4/50

Q201

2N4123

R209

33K

R234

2.7K

 

 

D403

 

 

 

 

 

C209

.047/100

Q202

2N4123

R210

10K

R235

10K

 

 

D404

+5V VOLTAGE REGULATOR

 

C210

4.7/35

Q203

2N4123

R211

270

R236

15K

 

 

X401

 

C211

.15/200

Q204

2N4125

R212

15K

R237

10K

 

 

R401

2K TRIMMER

 

C212

.022/25

Q205

BS170

R213

47K

R238

1M

 

 

R402

17.8K, 1/4W, 1%

 

C213

.022/25

Q206

2N4123

R214

15K

R239

15K

 

 

R403

2.80K, 1/4W, 1%

 

C214

4.7/35

Q207

2N5816

R215

100K

R240

5.6K

 

 

R404

2K TRIMMER

 

C215

18/15

 

 

R216

1K

R241

15K

 

 

R405

18.2K, 1/4W, 1%

 

C216

100pf/100

QU201

2N6027

R217

1K

R242

270

 

 

R406

5K TRIMMER

L

C217

 

 

 

R218

1K

R243

10

 

 

R407

33.2K, 1/4W, 1%

THRU

.022/25

 

 

R219

33K

 

 

 

 

R408

5K TRIMMER

6682-

 

VOLTAGE REGULATOR

 

 

 

 

C229

 

X201

R220

50K TRIMMER

 

 

 

 

R409

52.3K 1/4W, 1%

 

 

X202

F- TO -V CONVERTER

R221

15K

 

 

 

 

R410

10

D201

 

X203

QUAD OP-AMP

R222

10K TRIMMER

 

 

 

 

R411

5K TRIMMER

2

THRU

1A, 400 V

X204

QUAD OP-AMP

R223

33K

 

 

 

 

R412

31.6K, 1/4W, 1%

 

 

 

 

 

 

D206

 

 

R224

100K

 

 

 

 

R413

5K TRIMMER

 

 

 

 

 

 

 

 

 

D208

 

 

 

R225

1K

 

 

 

 

R414

51.1K, 1/4W, 1%

 

 

 

 

 

R226

10K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ENABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D7J

ACCELERATION CIRCUIT

FEED ENABLE CIRCUIT

 

 

 

 

 

 

 

COMPONENTS NOT ON P.C. BOARD

 

 

 

 

 

 

 

 

 

 

 

 

KEY TO SYMBOLS

 

 

 

 

 

 

 

 

 

DM401 DIGITAL METER

 

 

 

 

 

 

POWER SUPPLY SOURCE POINT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S7A

SPDT SPEED SET-ACTUAL

 

 

 

 

 

 

COMMON CONNECTION TO ANALOG POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

SUPPLY; 510 A5H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCHEMATIC LOCATION REFERENCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HORIZONTAL CO-ORDINATE LETTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VERTICAL CO-ORDINATE NUMBER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCHEMATIC IDENTIFICATION LETTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTES:

 

 

UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:

N.A.

511 IS CONNECTED TO 511A

 

 

 

BY CONNECTION TO

 

 

 

 

 

CAPACITORS = MFD/VOLTS

 

 

 

 

 

 

 

 

 

 

VOLTAGE P.C. BOARD.

 

 

 

 

 

RESISTORS = OHMS, 1 2 /WATT

 

 

 

 

 

 

 

 

 

N.B. THESE COMPONENTS ARE

 

 

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED

 

 

CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE

 

LOCATED ON POWER P.C.

 

 

 

 

 

INTERCHANGEABILITY OF A COMPLETE BOARD, THIS

 

BOARD (SEE SCHEMATIC A).

 

 

 

 

 

DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR CIRCUITRY OF CONTROLS HAVING A COMMON

 

 

 

 

 

 

 

 

 

CODE NUMBER.

 

 

 

 

 

 

 

 

 

ELECTRICAL SYMBOLS PER E1537.

UNLESS OTHERWISE

ON HOLE SIZES ON 2 PLACE ON 3 PLACE

ON ALL ANGLES

MATERIAL WITH

 

 

 

 

 

THIS SHEET CONTAINS PROPRIETARYINFORMATION

OWNED BY THE LINCOLN ELECTRIC CO. AND IS

NOT TO BE REPRODUCED, DISCLOSED OR USED

WITHOUT THE EXPRESS PERMISSION OF

THE LINCOLN ELECTRIC CO.

 

 

 

CONTROL CODES

9147

9338

FOR NA-5

 

 

 

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 avail- able 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.

NA-5

Page 148
Image 148
Lincoln Electric NA-5NF, NA-5SF service manual Control Circuit Schematic, C D E F G H L M

NA-5S, NA-5N, NA-5SF, NA-5NF specifications

The Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S are advanced welding helmets that are pivotal in enhancing the safety and efficiency of welders in various applications. These models are designed to provide exceptional protection and visibility, making them indispensable tools in the welding industry.

One of the main features of the NA-5 series is the auto-darkening filter technology. This feature allows the helmet to automatically adjust its shade based on the intensity of the arc. As the welder strikes an arc, the lens darkens instantaneously, shielding the eyes from harmful rays generated during the welding process. This functionality not only ensures safety but also enhances productivity, as welders do not need to manually flip the helmet up and down.

The helmets are equipped with a wide viewing area that allows for better visibility and precision while working. With a large lens, welders can easily monitor their work and surrounding environment, minimizing the risk of accidents. Additionally, the lightweight design of the NA-5NF, NA-5SF, NA-5N, and NA-5S provides comfort during extended periods of use, reducing neck strain and fatigue.

The NA-5 series is also well-regarded for its durability. Constructed from impact-resistant materials, these helmets can withstand the rigors of demanding work environments. This durability extends the lifespan of the helmet, making it a cost-effective investment for both professional and hobbyist welders.

Another notable characteristic is the adjustable sensitivity and delay settings found in certain models. These settings allow the user to customize the helmet based on their specific welding conditions. For instance, a welder can increase sensitivity for low-amperage tasks or adjust the delay to allow for a smoother transition from dark to light after completing a weld.

Furthermore, the helmets come with a reliable battery life, ensuring that they can be used for long periods without interruption. Some models also feature solar assist functionality, which helps recharge the auto-darkening filter, enhancing their overall efficiency.

In summary, the Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S welding helmets represent a significant advancement in personal protective equipment for welders. Their combination of auto-darkening technology, wide viewing area, lightweight design, durability, and customizable settings makes them an excellent choice for anyone engaged in welding tasks. With these helmets, users can achieve greater safety and efficiency in their work, enabling them to focus on their craft with peace of mind.