SAMSUNG SF150TB Service Manual

FACSIMILE

SF150T

CONTENTS

1. Precautions

2. Specification

3. Operating Instructions

4. Disassembly and Reassembly

5. Circuit Description

6. Troubleshooting

7. Electrical Parts List

8. Exploded Views and Parts List

9. PCB Diagrams

10. Block Diagram

11. Wiring Diagram

12. Schematic Diagrams

FACSIMILE

SERVICE

Manual

SF150T 1-1

1. Be sure that all built-in protective devices are in place. Restore any missing protective shields.

2. Make sure there are no cabinet openings through which people- particularly childrenmight insert fingers or objects and contact moving parts or dangerous voltages.

3. When re-installing chassis and assemblies, be sure to restore all protective devices, including control knobs and compartment covers.

4. Design Alteration Warning: Never alter or add to the mechanical or electrical design of this equipment, such as auxiliary connectors, etc. Such alterations and modifications will void the manufacturer's warranty.

5 Components, parts, and wiring that appear to

have overheated or are otherwise damaged should be replaced with parts which meet the original specifications. Always determine the cause of damage or overheating, and correct any potential hazards.

6. Observe the original lead dress, especially near sharp edges, AC, and high voltage power supplies. Always inspect for pinched, out-ofplace, or frayed wiring. Do not change the spacing between components and the printed circuit board.

7. Product Safety Notice: Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they provide could be lost if a replacement component differs from the original. This holds true, even though the replacement may be rated for higher voltage, wattage, etc.

8. Components critical for safety are indicated in the parts list with symbols . Use only replacement components that have the same ratings, especially for flame resistance and dielectric specifications. A replacement part that does not have the same safety characteristics as the original may create shock, fire, or other safety hazards.

1 Precautions

Follow these safety, ESD, and servicing precautions to prevent personal injury and equipment damage.

1-1 Safety Precautions

1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially available wrist strap device, which should be

removed for your personal safety reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assembly.

3. Use only a grounded-tip soldering iron to solder or desolder ESDs.

4. Use only an "anti-static" solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ESDs.

5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to damage ESDs.

6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.

7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.

9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing together of clothing fabric and lifting one's foot from a carpeted floor, can generate static electricity sufficient to damage an ESD.

Precautions

1-2 SF150T

1. Exercise caution when replacing a Lithium battery. There could be a danger of explosion and subsequent operator injury and/or equipment damage if incorrectly installed.

2. Be sure to replace the battery with the same or equivalent type recommended by the manufacturer.

3. Lithium batteries contain toxic substances and should not be opened, crushed, or burned for disposal.

1-3 Lithium Battery Precautions

1-2 ESD Precautions

Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called "Electrostatically Sensitive (ES) Devices", or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor "chip" components. The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.

CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8-1SF150T

8. Exploded Views and Parts Lists

8-1. Total Assembly

8-2 SF150T

Exploded Views and Parts Lists

Total Assembly Parts Lists

Location No. Description SEC. Code Q'ty Remark

1 ASS'Y-OPE UNIT JF96-01296A 1 2 ASS’Y-TOP COVER JF96-01297A 1 3 SPACER JF72-40611A 1 4 GUIDE-TX JF72-41122Z 1 5 PBA-LIU JF92-00843Q 1 6 REAR-BRKT JF70-10681A 1 7 PBA-MAIN JF92-00842E 1 8 SMPS-V2, AC/DC JF44-10059A 1

9 ASS’Y-BASE UNIT JF96-01298A 1 10 ASS’Y-MAIN CHASSIS UNIT JF96-01253A 1 11 ASS’Y-HANDSET JF96-01262A 1 12 CURL-CORD JF39-60075A 1 S1 SCREW, TAPTITE, BH, +, M3, L8 6003-000015 11 S2 SCREW, TAPTITE, BH, +, M3, L6 6003-000261 2 S3 SCREW, TAPTITE, BH, +, M3, L6 6003-000115 2

Exploded Views and Parts Lists

8-2. Ass'y OPE Unit

SF150T 8-3

Ass'y OPE Unit Parts Lists

Exploded Views and Parts Lists

8-4 SF150T

Location No. Description SEC. Code Q'ty Remark

ASS'Y-OPE UNIT JF96-01296A 1 1 OPE COVER JF72-42016Z 1 2 LCD-WINDOW JF75-11004F 1 3 KEY-ONETOUCH JF72-42021A 1 4 KEY-OHD JF72-42022A 1 5 KEY-STOP JF72-42029A 1 6 KEY-START JF72-42028A 1 7 KEY-TEL JF72-42026A 1 8 KEY-TAD(A) JF72-42056A 1 9 KEY-TAD(B) JF72-42057A 1

10 KEY-MENU JF72-42020A 1 11 KEY-RESOLUTION JF72-42018B 1 12 KEY-RECEIVE JF72-42017B 1 13 KEY-ANSWER JF72-42019M 1 14 RUBBER-CONTACT JF73-40521A 1 15 DISPLAY-LCD JF07-20061A 1 16 CBF-WIRE, MAIN-OPE, 18 P JF39-41081A 1 17 CBF-WIRE, LIU-OPE, 7 P JF39-40957A 1 18 PBA-OPE JF92-00844B 1 19 CHASSIS OPE UNIT JF70-10863A 1 20 BRKT-TPH UNIT JF70-10861B 1 21 GUIDE-TPH(R) JF70-10679A 1 22 PRINT HEAD-THERMAL JF47-30069B 1 23 PBA-P.EMPTY JF92-00704B 1 24 GUIDE-TPH(L) JF70-10679B 1 25 CBF-WIRE, MAIN-TPH, 14P JF39-40955A 1 26 BRUSH-ANTISTATIC JF75-10650A 1 27 FLAT CABLE, OPE-LCD JF39-41018A 1 S1 SCREW, TAPTITE, PWH, +, B, M2. 6003-000193 11 S2 SCREW-MACHINE, BH, +, M3, L4 6001-000125 4 S3 SCREW, TAPTITE, BH, +, B, M3, L 6003-000015 2

Exploded Views and Parts Lists

SF150T 8-5

8-3. Ass'y COVER TOP

Exploded Views and Parts Lists

8-6 SF150T

Location No. Description SEC. Code Q'ty Remark

ASSEMBLY-COVER TOP JF96-01297A 1 1 TOP COVER JF72-42015A 1 2 HINGE-OPE(R) JF70-10676A 1 3 COVER-SPRING(R) JF70-40562A 1 4 HINGE-BRKT(R) JF70-10677A 1 5 BATTERY-COVER JF72-42027A 1 6 HINGE-BRKT(L) JF70-10677B 1 7 COVER-SPRING(L) JF70-40562B 1 8 HINGE-OPE(L) JF70-10676B 1 9 SWITCH-HOOK, 48 V, 200 mA 3409-000117 1

10 PBA-HOOK JF92-00845C 1 11 SPEAKER, 1 W, 8 OHM, 83dB 3001-001044 1 12 UNIT-FIXING BRKT GB70-10500A 1 S1 SCREW, TAPTITE, BH, +, M3, L6 6003-000261 3 S2 SCREW, TAPTITE, BH, +, M3, L8 6003-000015 2 S3 SCREW, TAPTITE, PWH, +, B, M2.5, L6 6003-000193 2

Ass'y COVER TOP Parts Lists

Exploded Views and Parts Lists

SF150T 8-7

8-4. Ass’y Handset

Exploded Views and Parts Lists

8-8 SF150T

Ass’y Handset Parts Lists

Location No. Description SEC. Code Q'ty Remark

ASS'Y-HANDSET JF96-01262A 1 1 HANDSET-LOWER JF72-42014A 1 2 AUDIO-RECEIVER, 160 OHM 3009-001001 1 3 HOLD-DUMMY GB72-40792A 1 4 RUBBER-MIC JF73-40501A 1 5 PBA-H/S MIC JF92-00625A 1 6 CBF-HARNESS JF39-40834A 1 7 WEIGHT-BALANCE JF70-10864A 1 8 HANDSET-UPPER JF72-42013A 1 9 RING-OP, ID17, OD35 6044-000138 1

S1 SCREW, TAPTITE, PH, +, B, M3, 6003-000168 1

Exploded Views and Parts Lists

SF150T 8-9

8-5. Ass'y Base

Exploded Views and Parts Lists

8-10 SF150T

Ass'y Base Parts Lists

Location No. Description SEC. Code Q'ty Remark

ASS'Y-BASE JF96-01298A 1 1 CBF-WIRE, MAIN-CIS/MODE JF39-41062A 1 2 MICRO-SWITCH 3405-000166 1 3 STEP-MOTER, 7.5 DEG, 24 V 3101-000171 1 4 ASS’Y-MAIN CHASSIS UNIT JF96-01253A 1 5 BASE JF72-42025A 1 6 PBA-D’DET JF92-00888A 1 7 CBF-WIRE, HANDSET-LIU JF39-41066A 1 8 RUBBER-FOOT JF73-10002A 2 9 MIC-CONDENSOR 3003-000120 1

10 MIC-ADAPTER GB72-40770A 1 S1 SCREW, TAPTITE, BH, +, M3, L6 6003-000261 2

Exploded Views and Parts Lists

SF150T 8-11

8-6. Harness

4''

10'

11'

14'

Exploded Views and Parts Lists

8-12 SF150T

Harness Parts Lists

Location No. Description SEC. Code Q'ty Remark

1 CBF-WIRE, MAIN-TPH, 14 P JF39-40955A 2 CBF-WIRE, MAIN-OPE, 18 P JF39-41081A 3 CBF-WIRE, LIU-OPE, 7 P JF39-40957A 4 CBF-WIRE, MAIN-LIU, 22 P JF39-41063A 5 CBF-WIRE, LIU-HANDSET JF39-41066A 6 CBF-WIRE, MAIN-CIS/MODE JF39-41062A 7 CBF-WIRE, MAIN-D.DET, MIC, 5 P JF39-41078A 8 STEP-MOTER, 7.5 DEG, 24 V 3101-000171 9 CBF-WIRE, LIU-HOOK JF39-41080A

10 CBF-WIRE, POWER-MOTOR JF39-40963B 11 CBF-WIRE, POWER-TOP COVER JF39-40962B 12 CURL CORD JF39-60075A 13 CABLE CLAMP 6502-001026 14 CBF-WIRE, MAIN-BATTERY, 2 P JF39-41082A 15 CBF-WIRE, MAIN-SPEAKER, 2 P JF39-41079A

YY Y

NN N N

6. Troubleshooting

6-1. Initial Checkout and Overall Troubleshooting Flow

SF150T 6-1

Plug in the power

cord

Load document in

feeder

Copy OK ?

OGM play back ?

Call machine from

another phone

Auto Answer

OK ?

ICM Recording ?

Manual

operation OK ?

OGM Recording

RX OK ?

Document feed ? Push 'START' Key CIS ON ?

System

initialized ?

See Section 6-3 See Section 6-2

See Section 6-5See Section 6-4

See Section 6-5

See Section 6-8

See Section 6-7

See Section 6-6

See Section 6-9 See Section 6-10

Power Supply

OK ?

Start

Troubleshooting

6-2 SF150T

N N

Lift Handset

off hook

Dial tone OK ? TX OK ?

See Section 6-11

End

See Section 6-12

Troubleshooting

SF150T 6-3

6-2. Check Power Supply

Check AC socket voltage

Power cord connected ?

Start

220 - 240 VAC?

END

Connect as required Notify customer

N N

Check

Power Cord

Continuity

Replace Cord Replace Fuse Replace Q1

Fuse OK ?

Q1 OK ?

R5 changed

value ?

Remove short

End

Troubleshooting

6-4 SF150T

6-2-1 No + 5 V

output shorted ?Start

Y Y

Remove short

Replace D4

Check PCB Pattern Replace U2

Check CON 1

Check

U2 Input voltage

D4 Open or

Shorted ?

DC 6 V Check U2 ?

End

6-2-2 No -12 V

N N

output shorted ?

Start

Y Y

Remove short Replace D5

Check PCB Pattern Replace U1

Check CON1

Check

U1 Input voltage

D5 Open or

Shorted ?

-15 VDC U1 Output ?

End

Troubleshooting

SF150T 6-5

output shorted ?

Start

Y Y

Remove short

Replace D3

OVP operation

Restart Replace Q3

Check CON1

D3 Open or

Shorted ?

Check

OVP operation

Q3 OK ?

End

6-2-3 No + 24 V

6-2-4 + 24 V TPH Doesn't output

Check

C/S port short ?

Start

Remove short Replace Q5

Check CON1

Q5 OK ?

End

Troubleshooting

6-6 SF150T

6-3. System Not Initialized

Step motor driving

Start

See Section 6-2-2

Replace P5 Harness

or OPE PBA

Replace U3

Replace U7

Fax Engine IC

Replace U7

Fax Engine IC

Replace Main PBA

Replace U14

Motor Driver

Replace

X2 XTAL

Check U3 Pin 5 = "High"

Check U3 Pin 6 (above +2.25 V)

Check

P5 Harness or OPE

PBA

Check 12 MHz

Clock U7-37

Check 24 MHz

Clock U7-129

O.K ?

Check Vcc ³ 4.75 V P1-4 (+5V) P1-3 (GND5)

End

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