OHAUS SF40A Bedienungsanleitung

SERVICE MANUAL

SF40A Printer

Ohaus Corporation, 7 Campus Drive, Suite 310, Parsippany, NJ 07054 (973) 377-9000

SERVICE MANUAL

SF40A Printer

The information contained in this manual is believed to be accurate at the time of publication, but Ohaus

Corporation assumes no liability arising from the use or misuse of this material. Reproduction of this

material is strictly prohibited.

Material in this manual is subject to change.

P/N 30064726

TM Registered trademark of Ohaus Corporation.

SF40A Printer Service Manual

SF40A Printer Service Manual 1-1 Ohaus Corporation www.ohaus.com

1.1 INTRODUCTION

This service manual contains the information needed to perform routine maintenance and

service on the Ohaus SF40A Printer. Familiarity with the printer’s Instruction Manual is

assumed.

1.2 SERVICE FACILITIES

To service a printer, the service area should meet the following requirements:

Should be temperature controlled and meet printer’s specifications for temperature

environmental requirements.

Area must be clean and free of excessive dust.

Work surface must be stable and level.

Printer must not be exposed to direct sunlight or radiating heat sources.

Use an approved Electro-Static Device.

1.3 TOOLS AND TEST EQUIPMENT REQUIRED

The service shop should contain the following equipment:

1. Standard hand tools.

2. Digital Voltmeter (DVM).

3. Standard Electronics tool kit.

4. Grounding mat and clip.

SF40A Printer Service Manual

Ohaus Corporation www.ohaus.com 1-2 SF40A Printer Service Manual

1.4 Open Unit

1 Disconnect Line and Interface

Cables.

2 Remove Top Paper Cover and Paper

Roll/Rotary Axis.

3Remove screw Aand flip Top

Housing to the front.

4 Disconnect Keypad B.

1.5 Replace Print Head, Rubber pads

1Open Unit, (see section 1.4).

2Disconnect Print Head Cfrom Main

PCB D.

3Remove the ribbon cartridge E.

3Loosen the 2 front screws, remove

the 2 rear screws and replace the

Print Head.

4 The Rubber Pads Fare pressed

into their respective sockets. To

replace, pull pad off and press new

one into socket.

SF40A Printer Service Manual

SF40A Printer Service Manual 1-3 Ohaus Corporation www.ohaus.com

1.6 Replace Main PCB

1Open Unit, (see section 1.4).

2Disconnect RS Cable G.

3Disconnect power (red) and ground

(black) cable Hon Power Supply

PCB.

4 Remove Print Head C, see section

1.5.

5Unscrew and remove/replace Main

PCB I.

1.7 Replace Power Supply PCB

1 Open Unit, (see section 1.4).

2Disconnect 4 cables J1 to J4 K.

3Unscrew Land remove/replace

Power Supply PCB.

1.8 Replace Interface PCB

1Open Unit, (see section 1.4).

2Disconnect Interface Cable P on

Interface PCB R.

3Lift out and remove/replace

Interface PCB.

SF40A Printer Service Manual

Ohaus Corporation www.ohaus.com 1-4 SF40A Printer Service Manual

1.9 Replace DC Power Socket, Power Switch

1Open Unit, (see section 1.4).

2Disconnect affected cables.

3Pinch retaining clips and lift

switch A out.

1.10 Replace Keypad Overlay

Note: Once removed, the keypad cannot

be reused.

1Open Unit, (see section 1.4).

2Use a knife to prize up a corner of

the keypad and slowly pull it off.

3 Remove any residual adhesive (use

acetone if need be).

4On the new keypad, remove cover

film of adhesive surface.

5Insert ribbon cable in top housing

and line up the keypad with the edge

of the bottom rim of the depression in

the top housing. Now lay keypad in

the depression and press down.

SF40A Printer Service Manual

SF40A Printer Service Manual 1-5 Ohaus Corporation www.ohaus.com

1.11 Parts List

Figure 1. Housing & Internal Parts

SF40A Printer Service Manual

Ohaus Corporation www.ohaus.com 1-6 SF40A Printer Service Manual

Table 1. Housing & Internal Parts

Drawing Item

Part Number

Description

30047930

SP Housing Bottom SF40A

30047931

SP Housing Top SF40A

30047932

SP Keypad SF40A

30047933

SP PCBA Main SF40A

30047934

SP Printer Head SF40A

30047935

SP Kit Hardware SF40A

30047936

SP PCBA Power SF40A

30047937

SP PCBA RS232 SF40A

30047938

SP Switch with cable SF40A

30047939

SP Cover Paper SF40A

30063920

SP Axis Paper SF40A

30063921

SP Cable RS board SF40A

12120799

Paper 57.5x φ50-60mm

12120798

Ribbon cartridge

11107909

Power Adapter 12V/2A

12120313

Power cable for AU

83033772

Power cord for Brazil

12120312

Power cable 8940H for GB

12120762

Power cable for US RS-P26

12120761

Power cable for EU RS-P26

12120308

Power cable for CN

12122638

Cable power white for JP PSE mark

30064089

Cable Power-cord White for CH SF40A

30064200

Cable Power-cord White for IT SF40A

30064201

Cable Power-cord White for AR SF40A

12122603

Cable RS232 M/F 1.5m

30059316

SP Cable Adapter RS232 F-M SF40A

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