SAMSUNG S1000L Service Manual

INTERIOR COMPONENT SYSTEM

S1000

SERVICE

Manual

INTERIOR COMPONENT SYSTEM CONTENTS

1. Precautions

2. Specifications

3. Disassembly and Reassembly

4. Alignment and Adjustments

5. Special Circuit Descriptions

6. Troubleshooting

7. Exploded Views and Parts List

8. Electrical Parts List

9. Block Diagrams

10. PCB Diagrams

11. Wiring Diagram

12. Schematic Diagrams

1. Precautions

Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays.

1-1 Safety Precautions

1. Be sure that all of the built-in protective devices are replaced.

(Reading should

2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including control knobs and compartment covers.

3. Make sure that there are no cabinet openings through which people-particularly children--might insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers.

Device Under

Test

Test all

exposed metal

surfaces

2-Wire Cord

Also test with plug reversed (using AC adapter plug as required)

Fig. 1-1 AC Leakage Test

not be above

0.5mA)

Leakage Currant Tester

Earth Ground

4. Design Alteration Warning: Never alter or add to the mechanical or electrical design of the unit. Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturer's warranty.

5. Leakage Current Hot Check (Figure 1-1): Warning: Do not use an isolation transformer during this test. Use a leakagecurrent tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit's AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, etc.) and all exposed metal parts. Examples: Handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the powerplug prongs in the AC outlet and repeat.

6. Insulation Resistance Cold Check: (1) With the unit's AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. (2) Set the power switch to ON. (3) Measure the resistance between the shorted AC plug and any exposed metallic parts. Example: Screwheads, antenna, control shafts or handle brackets.

If any of the exposed metallic parts has a return path to the chassis, the measured resistance should be between 1 and 5.2 megohms. If there is no return path, the measured resistance should be "infinite." If the resistance is outside these limits, a shock hazard might exist. See Figure 1-2

Antenna Terminal

Exposed Metal Part

ohm

Ohmmeter

Fig. 1-2 Insulation Resistance Test

Samsung Electronics 1-1

Precautions

1-1 Safety Precautions (Continued)

7. Components, parts and wiring that appear to have overheated or that are otherwise

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

8. Observe the original lead dress, especially

near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that no wires or components touch thermally hot parts.

1-2 Servicing Precautions

9. 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 give might be lost if the replacement component differs from the original--even if the replacement is rated for higher voltage, wattage, etc.

10 Components that are critical for safety are

indicated in the circuit diagram by

shading, or . Use replacement

components that have the same ratings,

especially for flame resistance and

dielectric strength specifications. A

replacement part that does not have the

same safety characteristics as the original

might create shock, fire or other hazards.

Warning1: First read the "Safety Precautions" section of this manual. If some unforeseen circumstance creates a conflict

between the servicing and safety precautions, always follow the safety precautions.

1. Servicing precautions are printed on the cabinet. Follow them.

2. Always unplug the unit's AC power cord from the AC power source before attempting to: (a) Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.

3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring may be clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

4. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged.

5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).

6. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

7. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

8. Always connect a test instrument's ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument's ground lead last.

Samsung Electronics1-2

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

Precautions

1. Some semiconductor ("solid state") devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs). Examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.

2. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying power--this is an electric shock precaution.)

3. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of electrostatic charge.

4. Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDs.

5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.

6. Use only an anti-static solder removal device. Many solder removal devices are not rated as "anti-static" (these can accumulate sufficient electrical charge to damage ESDs).

7. Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

8. Immediately before removing the protective 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.

9. Minimize body motions when handing unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD.

1-4 Special Precautions and Warning Labels for Laser Products

(UL)

This Product Complies with DHHS Rules 21CFR, Sub chapter J.At date of Manufacture

(SCAN)

CAUTION : INVISIBLE LASER RADIATION WHEN OPEN

AND INTERLOCKS DEFEATEO AVOIDEXPOSURE TO BEAM

ADVARSEL:USYNLIG LASERSTRÅLING VED ABNING

NÅR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION

UNDGA UDSAETTELSE FOR STRALING

VARO:AVATTAESSA JA SUOJALUKITUS OHITETTAESSA

OLET ALTTINA NAKYMATTÖMALLE LASERSATEILYLLE ALA KATSO SATEESEEN!

VARNING:OSYNLIG LASERSTRÅLNING NAR DENNA DEL

AR OPPNAD OCH SPARREN AR URKOPPLAD BETRAKTA EJSTRÅLEN!

CERTIFIED ONLY TO CANADIAN ELECTRICAL CODE.

CERTIFIE EN VERTU DU CODE CANADIAN DE LELETRICITE SEULEMENT

Fig. 1-3 Warning Labels (Location: Enclosure Block)

(EU)

(CSA)

UL : Manufactured for U.S.A. Market. CSA : Manufactured for Canadian Market. EU : Manufactured for European Market. SCAN : Manufactured for Scandinavian

Market.

(EU)

CLASS 1 LASER PRODUCT

Fig. 1-4 Warning Labels (Location: Disc Clamper, Inner Side of Unit Door or Nearby Unit Chassis )

Samsung Electronics 1-3

Precautions

1-4 Special Precautions and Warning Labels for Laser Products (Continued)

1-4-1 Warnings

1. When servicing, do not approach the LASER exit with the eye too closely. In case it is necessary to confirm LASER beam emission, be sure to observe from a distance of more than 30 cm from the surface of the objective lens on the optical pick-up block.

2. Do not attempt to handle the objective lens when the DISC is not on the tray.

1-4-2 Laser Diode Specifications

Material: GaAs+ GaAlAs Wavelength: 760-800 nm Emission Duration: Continuous

Laser Output: 0.2 mw (measured at a

1.6 mm distance from the objective lens surface on the optical pick-up block.)

1-4-3 Handling the Optical Pick-up

1. Static electricity from clothing or the body may cause electrostatic breakdown of the laser diode in the Optical Pickup. Follow this procedure:

2. Place a conductive sheet on the work bench (i.e., the black sheet used for wrapping

repair parts.) Note: The surface of the work

bench should be covered by a copper

ground plane, which is grounded.

3. The repair technician must wear a wrist strap which is grounded to the copper sheet.

4. To remove the Optical Pickup block: Place the set on the conductive sheet, and momentarily touch the conductive sheet

with both hands. (While working, do not

allow any electrostatic sources--such as clothes--to touch the unit.)

5. Ground the "Short Terminal" (located on the PCB, inside the Pickup Assembly) before replacing the Pickup. This terminal should be shorted whenever the Pickup Assembly

is lifted or moved.

short terminal

SOH91VI(LDP)

short terminal

SOH91CI(CAR,walkman)

6. After replacing the Pickup, reopen the Short Terminal. See diagrams below:

THE UNIT

(1) WRIST-STRAP FOR GROUNDING

short terminal

SOH-A1

(CMS-V10,CMS-V30)

SOH94T4N

(CMS-V10,CMS-V30)

CONDUCTIVE SHEET

short terminal

Samsung Electronics1-4

2. Product Specfications

Samsung Electronics

2-1

General

Amp

Cassette

Tuner

Compact Disc

Power source Power consumption Dimensions (mm)

Power output Total harmonic distortion Frequency range Signal to noise ratio Channel separation Input sensitivity

Frequency range Usable sensitivity Signal to noise ratio IF rejection ratio Total harmonic distoration Separation (Stereo)

Frequency range Usable sensitivity Signal to noise ratio IF rejection ratio Total harmonic distortion

Frequency range WOW FLUTTER Erasing effect Signal to noise ratio Total harmonic distortion

Frequency response Signal to noise ratio Channel separation Total harmonic distortion

125Hz ~ 12.5KHz

0.15% 60 dB 40 dB

2.5%

20Hz ~ 20KHz(±1dB) 95 dB(1kHz 0dB) 90 dB(1kHz 0dB)

0.004%(1kHz 0dB)

87.5 ~ 108MHz 1µV 64 dB 70 dB

0.45% 35 dB

522 ~ 1611KHz 600µV 40 dB 30 dB 2%

30W / Ch(6Ω),THD1%

0.08% 20Hz ~ 20kHz 80 dB 50 dB (1kHz) 250mV

230V 160W 825(W) x 330(H) x 118(D)

Specifications are subject to change without notice.

3. Disassembly and Reassembly

3-1 Frame-Jersey

1. Remove 4 screws ! holding the Frame-Jersey, and disassemble the Frame-Jersey (Arrow ÔAÕ).

2. Remove 2 screws @.

3. Remove 2 screws # and disassemble the Base-Set.

Frame-Jersey

Base-Set

Figure 3-1

Samsung Electronics 3-1

Figure 3-2

3-2 Samsung Electronics

3-2 Front

Disassembly and Reassembly

1. Disassemble the AssÕy-Glass (Arrow ÔAÕ).

2. Remove 4 screws !.

3. Remove 4 screws @ and disassemble the AssÕy-CD (Arrow ÔBÕ).

4. Remove 4 screws # and disassemble Decoration-Cassette (Arrow ÔCÕ).

5. Remove 4 screws $ and disassemble the Housing-Cassette (Arrow ÔCÕ).

Ass'y CD

Ass'y-Glass

Decoration-Cassette

Housing-Cassette

1. Remove 3 screws @.

2. Remove 11 screws !.

3. Disassemble the Frame-Main AssÕy (Arrow ÔAÕ).

Frame-Main Ass'y

Figure 3-3

3-3 Frame-Main Ass’y

Samsung Electronics 3-3

3-4 Key-Ass’y

1. Move the Gear (part of Gear-Box) to open the door. (Arrow ÔAÕ).

2. Disassemble the Knob-AssÕy (Arrow ÔCÕ).

Knob-Ass'y

Door

Gear-Box

Figure 3-4

3-4 Samsung Electronics

Disassembly and Reassembly

4. Alignment and Adjustments

4-1 Tuner

Samsung Electronics 4-1

FM THD Adjustment

Minimum Distortion (Figure 4-1)

SSG FREQ. Adjustment

point (IFT6)

98 MHz

FM DETECTOR COIL

FM Search Level Adjustment

“TUNED” is shown on FLT (Figure 4-2)

* Note : Adjust FM S.S.G Level to

EMF 21dB(Included Loss)

Figure4-2 FM Auto Search Level Adjustment

Figure4-1 IF CENTER and THD Adjustment

SSG FREQ. Adjustment

point

(MSR1)

98 MHz

SEMI-VR(5KB)

FM SSG

GND

30 dB

FM SSG

Output GND

Speaker Terminal

FM Antenna Terminal

Distortion Meter

Input

SET

Input

output

Oscilloscope

75Ω

Dummy

FM IN

FM Antenna

SET

5 kB

AM IF Adjustment

Level : Maximum (Figure 4-3)

Figure4-3 AM IF Level Adjustment

SSG FREQ. Adjustment

point

(IFT2)

594 MHz

AM IF COIL

AM SSG

60 cm

VTVM

Oscilloscope

FM Antenna Terminal



IFT2

IFT4

MVR1

4-2 Samsung Electronics

Alignment and Adjustments

4-2 Cassette Deck

4-2-1 To Adjust Tape Speed

1) Measuring tape: i) MTT-111 (or equivalent) (Tapes recorded with 3kHz)

2) Connect the cassette deck to the frequency counter

as shown in figure 4-4.

1) Before the actual adjustment, clean the play/recording head.

2) Measuring tape : i) MTT-114NA(or equivalent 12.5kHz AZIMUTH control) ii) MTT-150(or equivalent : Dolby level 200nwb/m)

3) Dolby NR SW OFF

4) The cassette deck is connections as shown in figure 4-6.

Notes

Control counter

Output (connected to the frequency counter)

Turn DSR3 to left and right

3KHz ±1%

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup Condition

1) Deck:MTT-111

2) Press PLAY SW button

AZIMUTH

DWA2 Output (VTVM is connected to the scope)

1) Turn the control knob to as shown in Figure4-5.

2) Adjust the right

control screw to playback REV. Mode

Max output and same phase (both channels)

After adjustment secure it with REGION LOCK.

25mV ±0.5dB

L-CH:Turn DSR1L

to the right and left

R-CH:Turn DSR1R

to the right and left

See the diagram for adjustment locations.

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup Condition

Same as above

After putting MTT114NA into Deck 1

1) Press FWD PLAY button.

2) Press REV PLAY button.

PLAY MTT-150 on Deck .

Replay out Level

4-2-2 To Adjust Playback Head

! Adjust Deck Replay Level

TP3

Cassette Deck

output

LINE OUT

Frequency Counter

Figure 4-4

Figure 4-5

Recording /Play head

Reverse Play

AZIMUTH control knob

Figure 4-6

In Out

V H

DWA2

Cassette Deck

VTVM Oscilloscope

DWA2

DSR3

DSR1L

DSR1R

DSR2R

DSR4

DSR2L

DWA3

DL5R

DL5L

DL4

4-3Samsung Electronics

1) Connect the measuring instruments as shown in Figure 4-7.

2) Set the DOLBY NR Switch off.

3) Measuring tape: i) MTT-5562(or equivalent CrO2 recording)

ii) MTT-5512 (or equivalent: normal recording)

4) The input signals supply 1kHz 250mV into AUX IN of AMP (AUDIO OSC.)

4-2-3 To Adjust Recording PLAY

BIAS OSC. Frequency

Connect the frequency counter to DWA3

Turn BIAS oscillator frequency coil (DL4) to the right and left

105kHz ±5%

VTVM Maximum

VTVM (27V ±5%)

VTVM (14V ±5%)

Turn: DSR5R,5L the right and left.

L-CH: Turn DSR2L and R-CH: DSR2R to the right and left

DSR4 turn DSR4 to the right and left

See diagram for adjustment locations

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup Condition

Connect to DWA3 as shown in Figure4-7 and read VTVM (DSR2L,2R: MAX Condition)

Connect to DWA3 as shown in Figure 4-7 and read the VTVM

Insert MTT-5562 into Deck, then press REC Pause button.

Insert MTT-5512 into Deck, then press REC Pause button.

Recording play OSC. level

CrO2 REC level adjustment

Normal REC. level adjustment

AUX IN

VTVM

AUDIO OSC



Figure 4-7

Audio OSC.

Cassette Deck

Oscilloscope

AUX IN

LINE OUT

VTVM

DWA3

IN OUT

NOTES

Alignment and Adjustments

4-3 CD

Alignment and Adjustments

4-4 Samsung Electronics

4-3-1 To Adjust FOCUS BIAS (STOP mode)

1. Set Volt/Div of the oscilloscope to DC 100mV.

2. Ground the scope input and set the waveform to 0v, DC range.

3. Connect the GND terminal of the oscilloscope to Vref, and (+) terminal to center of FE2.

4. Set WVR1 to 0mV.

4-3-2 To Adjust Tracking Gain (PLAY mode)

1. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to TE2.

2. Load and play the disc.

3. While the disc is running adjust the gain with WVR4 as shown below.

4-3-3 To Adjust Focus Gain (PLAY mode)

1. Connect the ground terminal of the oscilloscope to Vref and (+) terminal to FE2.

2. Load and play the disc.

3. While the disc is running adjust the gain with WVR3 as shown in the following figure.

4-3-4 To Adjust E/F Balance (PLAY mode)

1. Set Time/Div of the oscilloscope to 2mS.

2. Set Volt/Div of the oscilloscope to 0.5V.

3. Ground the scope input and set to DC, and then set the DC range.

4. Connect the ground terminal of the oscilloscope to Vref and (+)terminal to TE2.

5. Load and play the disc.

6. Turn WVR4 counterclockwise to the minimum value.

7. Raise WVR2 and adjust the waveform so that its middle comes to ground of the oscilloscope. (Or, until the upper half of waveform becomes symmetrical to the bottom half,A=B)

8. Ajdut WVR4 (arrow) for normal sound.

Normal Frequency

VOLT/DIV : 0.2V TIME/DIV : 2mS

Low Frequency

High Frequency

A=B

Normal Frequency

VOLT/DIV : 0.1V TIME/DIV : 2mS

Low Frequency

High Frequency

100mV

250mV

100mV

5. Special Circuit Descriptions

5-1 CD

5-1-1 RF Amp (KA9220) : WIC01

5-1-2 Focus Error Amp (KA9220) : WIC01

5-1-3 Focus Servo System (KA9220) : WIC01



Photo Detector

PD1

PD2

58K

RF I-V AMP(1)

58K

10K

RF I-V AMP(2)

10K

RF SUMMING

V1 AMP

RFO

RF I-V Amp(I-1) and RF I-V Amp (I-2) are converted to voltage (via internal resistance of 58k½) from the current of PD1 (A+C) and PD2 (B+D): These voltages are added by the RF summing amplifier. The signal (A+B+C+D) is applied to RFO (No.2 terminal) RF output voltage is calculated as follows :

FOCUS ERROR Amp AMPLIFIES the difference between RF I-V Amp (1) output (A+C) and RF I-V Amp (2) output (B+D) These two signals are supplied to (-) and (+) input terminals of the FOCUS ERROR Amp. The FOCUS ERROR signal resulting from this difference voltage is applied to FE (Terminal No. 57). The FE output voltage of this low frequency component varies according to {(A+C) - (B+D)}. VFE is calculated as follows: VFE=(R2/R1) X (V2-V1) = 5.4(V2-V1) This FOCUS ERROR voltage is sent to FOCUS SERVO.

When FS3 is ON, high-frequency gain decreases (time constant is set by pin17, pin19, and capacitor connected to internal resistance). The capacitor between pin18 and GND sets the time constant to pass low freqencies in PLAY mode.

The maximum frequency of focus phase compensation is inversely proportional to the resistance connected to pin 7. Focus search peak is about 1.1 Vp-p, and is inversely proportional to the resistance connected to pins 22,23 (if this resistance changes, the peak of track jump and sled kick change). The inversion input of FZC comparator is set to 5.7% of the difference between Vcc and VC (pin69) {(5.7% x (Vcc-Vc)}. Note : If the resistance connected to pin 7 changes, the phase compensation peak of focus,tracking,sled servos change. At the same time, Ôop-ampÕ dynamic range and offset voltage also change.

VRF = -R3 x (iPD1 + iPD2)

= -R3 x (V1/R1 + V2/R2) = -R3 x ( + ) = x (V1 + V2)

R3 10K

V1 10K

V2 10K

174K

C1 25P

FOCUS ERROR

AMP

164K

32K

C2 25P

-(A+C)

-(B+D)

V1 32K

3.6K

60K

FZC

0.0022

20K

0.1UF

FDFCT

HFGD

EFR

FE2

470K

DFCT

FS4

20K 48K

46K

580K FS3

FSW

470K

130K

0.1UF

40K

PFSET

FS2

PHASE COMPENSATION

92K

40K

10K

4.7UF

FSCH

FS1

50K

5.5U 11U

VREG

180K

ISET

FCE

120K

FOCUS COIL

FSEO

FE1

Samsung Electronics 5-1

5-1-4 Tracking Sled Servo System (KA9220) : WIC01

5-1-5 Motor Drive (LB1649) : UIC4

The capacitor between pins 15 and 16 attenuates high frequencies when TG2 is off. The maximum frequency of tracking phase compensation is inversely proportional to the resistance connected to pin 7 (about 1.2kHz at 470k). The tracking jump (FWD and REV) is determined when TM3 and TM4 are ON, and the peak voltage induced from tracking coil is decided by both TM3 and TM4 current values and feedback resistance of pin 47. Tracking jump max voltage = TM3 (TM4) current x feedback reisistance.

FWD or REV sled kick occurs when TM5 or TM6 is ON, and the peak voltage added to sled motor is decided by TM5 or TM6 current and the feedbadk resistance of pin 41. Sled jump max voltage= TM5 (TM6) current x feedback resistance Each SW current is decided by the resistance connected to pin 22 and 23. When the resistance is about 150½,

TM3 or TM4 = 11µA,

TM5 or TM6 = 22µA, This current is inversely proportional to the resistor, variable within a range of 5 to 40µA for TM3. STOP is the ON/OFF detection signal for the limit SW (or the sled motorÕs innermost cirumference).

22 23

0.022UF

TZC

0.047UF

150K

BPF

TZC

100K

ATC

20K

TE 1

TE2

470K

100K

ATS

TDFC1

0.1UF

680K

66PF

10K

DFCT

0.1UF

RTG

20K

TGSW

470K

TG2

82K

110K

PHASE

COMPENSATION

S STOP

100K

S STOP

SLED

SLEI

SLEN

10K

56K

100K

ISET VREG

180K

SLED DRIVER

120K

100K

TKEO

TKEI

TM2

TM6

TM5

TM4

5.5U

TM3

5.5U

10K

90K

TM7

PFSET

470K

TRACKING COIL

5-2 Samsung Electronics

Special Circuit Descriptions

OUT1

OUT2

VCC1

IN 1

Fin

IN 2



VZ1

VZ2

IN3

IN4

7 VCC2

OUT3

OUT4

Input Logic Input Logic

Pre-Driver

IN 1 2

OUT1

0 1 0 1

0 0 1 1

L L

IN 3

OUT3

OUT4

0 1 0 1

0 0 1 1

L L

6. Troubleshooting

6-1 Amplifier

6-1-1 Power Malfunction

Check voltage of XIC3

Check waveform of XIC1

pins 16,18,25,27



Check waveform of WIC41

pins 8,11,12



Yes

Replace XIC03



Malfunction of Audio Output



Yes

Check waveform of XIC2L,2R

pins 2,7

Check Amp operation

Yes

Check XIC1 soldering condition

Replace WIC41 Check WIC41 soldering condtion

Replace XIC2L,2R Check XIC2L,2R soldering condition

Samsung Electronics 6-1

6-1-2 FLT Malfunction

Connector inserted

correctly?

Check voltage : AC 5V

at FRONT-PCB FLT?

Check Main-PCB Front PCB connection and the voltage of RWA3, pins2,3(AC 5V)

Check voltage at FIC1

pin 54(-33V)

Check the voltage of RZD5(-30V)



Replace FIC1(LC75710)



Yes

Reinsert the connector

6-2 Samsung Electronics

Troubleshooting

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