Samsung ML-1210, ML-1220, ML-1250 Precautions

Precautions

1-1

Samsung Electronics

1. Precautions

1-1 Safety Precautions

1-2 Precautions on Disassembly and Reassembly

Please read the following carefully to prevent any accidents and not to damage the unit during service.

1. Safety Precautions There are some electric or machinery parts with safety related property. If the parts replaced are different from the original, the safety may not function. Even if the part could allow higher voltage than that of the part used, do not replace it and use a regular product clarified in specifications.

2. Be careful not to leave a switch, a cover or a safety device out when reinstalling or assembling the product after repair.

3. Replacing Precautions Do not change or add parts as you like. You cannot benefit from such a remodeled product at your will during the term of guarantee.

4. You must replace overheated or damaged parts or cords with regular products. Please solve the problem causing any damage or overheating and troubles beforehand.

Especially mind the safety on the part with this mark.

You must use regular parts described in specifications for the parts inflammable and where the current can be flown. Otherwise any hazard such as an electric shock or a fire could occur.

LASER STATEMENT (LASERTURVALLISUUS)

WARNING : NEVER OPERATE AND SERVICE THE PRINTER

WITH THE PROTECTIVE COVER REMOVED FROM LASER/SCANNER ASSEMBLY. THE REFLECTIVE BEAM, ALTHOUGH INVISIBLE, CAN DAMAGE YOUR EYES.

Class 1 laser product

Luokan 1 laserlaite Klass 1 laser apparat

Allonpituus 770-795nm Teho 0.3mW±0.03mW

CAUTION

VORSICHT

ATTENTION

ATTENZIONE

PRECAUCION

CAUTION : Avoid exposure to invisible laser radiation when the

development unit is not installed.

INVISIBLE LASER RADIATION WHEN THIS COVER OPEN. DO NOT OPEN THIS COVER.

UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEOFFNET. NIGHT DEM STRAHLAUSSETZEN.

REYONNEMENT LASER INVISIBLE EN CAS D’OUVERTURE. EXPOSITION DANGERUSE AU FAISCEAU.

RADIAZIONE LASER INVISIBLE IN CASO DI APERTURA. EVITARE L’ESPOSIZONE LA FASCIO.

REDIACION LASER INVISIBLE CUANDO SE ABRE. EVITAR EXPONERSE AL RAYO.

Very careful precautions should be taken when replacing parts. Before replacing, please check cables because you cannot put the cables that you removed for replacing parts into the proper place if you would not make sure of where they were connected and in which condition.

Please do the following before disassembling for a repair or replacement of parts.

1. Pull out paper cassette, printer cartridge installed. Especially careful not to be scratched by the surface of developer or not to expose them to light.

2. Turn the power switch off.

3. Take out the power plug, printer cable from the printer.

4. Use only the same type of part as original when replacing parts.

5. Do not force to open or fasten plastic material compo-

nents.

6. Be careful that small parts such as screws should not

get in the printer.

7. When disassembling, assembling, also observe small components are located in place.

8. If you uncover and turn the machine over to replace some parts, toner or paper particles may contaminate the LSU window. Protect the LSU window with clean paper.

Releasing Plastic Latches

Many of parts are held in place with plastic latches. The latches break easily : release them carefully. To remove such parts, press the hook end of the latch away from the part to which it is latched.

Precautions

1-2

Samsung Electronics

1-3 Tools for Troubleshooting

The following tools are recommended for safe and smooth troubleshooting described in this service manual.

DCU(Diagnostic Control Unit)

Standard: Test equipment to diagnose the Laser printer supplied by Samsung Electronics.

DVM(Digital Volt Meter)

Standard: Indicates more than 3 digits.

Electronic Scale

Standard: Equipment to check the weight of consumables(toner cartridge) supplied by Samsung Electronics. (The gram unit can be measured.)

Driver

Standard: "-" type, "+" type (M3 long, M3 short, M2 long, M2 short).

Pinset

Standard: For general home use, small type.

Cotton Swab

Standard: For general home use, for medical ser-

vice.

Cleaning Equipments a IPA(Isopropyl Alcohol)dry cloth or a soft stuff neutral detergent.

Software(Driver) installation CD ROM

Mind your hands not to be touched when you disassemble and reassemble PBAASS'Y, such as the main board, SMPS, HVPS.

Note

Ground