SAMSUNG MAX460V Service Manual

3CD CHANGER MINI COMPONENT

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

SERVICE

Manual

3 CD CHANGER VIDEO CD MINI MINI COMPONENT

MAX-460V

CONTENTS

©

Samsung Electronics Co., Ltd. Dec. 1996. Code No. AH68-20139A

2. Specifications

Power source Power consumption Dimensions (mm)

220V 50Hz(Option) 150W 270(W) x 315(H) x 335(D)

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 Usable sensitivity Signal to noise ratio

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

Frequency response Signal to noise ratio Channel separation Total harmonic distortion

87.5 ~ 108MHz 8µV 55dB 60dB

0.7% 23dB

522 ~ 1611KHz 600µV 40dB 45dB 2%

146 ~ 290KHz 1250µV 35dB

125Hz ~ 8KHz

0.35% 55dB 45dB 2%

20Hz ~ 20KHz(¡ 1dB) 95dB(1kHz 0dB) 75dB(1kHz 0dB)

0.05%(1kHz 0dB)

40W/CH(6Ω)

0.5% 20Hz ~ 20kHz 75dB 50dB 400mV

General

Amplifier

Tuner

Cassette

Compact Disc

FM

LW

MW

(AM)

Samsung Electronics 2-1

* Specifications are subject to change without notice.

(OPTION)

3. Disassembly and Reassembly

3-1 Cabinet-Top

1. Remove 11 screws holding the cabinet-top.

2. Lift the back of the cabinet-top and slide it to the rear to remove. (See arrow)

Samsung Electronics

3-1

Figure 3-1

3-2 CD-MECHA, DOOR-CD

1. If power is connected :

- Turn power on

- Open the tray using the open/close key

- Remove the Door in the direction of arrow #.

2. If power is not connected :

- Turn the gear clockwise using a screw driver as shown in Figure 3-2- 1.

- Pull the Tray in the direction of arrow @ and then remove the Door in the direction of arrow # .

3. Remove 2 screws $ and lift the CD-MECHA.

1

2

3

4 4

3-2

Samsung Electronics

Figure 3-2-1

Figure 3-2

Disassembly and Reassembly

3-3 Cabinet-Rear and Main PCB

3-4 Cabinet-Front and Cabinet-Bottom

1. Remove 14 screws % and then lift the cabinet-rear ^ and slide it to rear to remove (see arrow).

2. Remove the Main-PCB & to rear.

A A

BB

8 8

1. Remove 5 screws *.

2. Remove the cabinet-rear by pushing the "A" and "B" as shown.

Samsung Electronics 3-3

Figure 3-3

Figure 3-4

7 7

66

55

Disassembly and Reassembly

3-5 CD Mecha Main

3-4 Samsung Electronics

Figure 3-5

11

34

30

36

17

33

5

4

9

28

7 8

6

32

10

18

26

25

29

16

1

3

22

2

24

21

20

19

35

31

13

15

14

4

6

5

7

1

3

2

8

37

27

12

Disassembly and Reassembly

3-5 CD Mecha Main Continued

3-6 CD-PCB

1. Turn the Bracket-chuck ! counter clockwise to remove.

2. Remove the Table-Chuck union @.

3. Remove the Magnet-Chuck #.

4. Remove the screw $ and then lift the Gear-Tray(2) %.

5. Remove the Belt-disc ^.

6. Remove the screw & and then lift the Gear-Pulley * .

7. Lift the Gear-Tray(1) ( .

8. Remove 2 screws and then remove the Motor-DC 1.

9. Remove the Pulley-Motor 2.

10. Remove 1 screw Y and then remove the PCB-SUB switch 3.

11. Remove the Switch-Micro 4 with using the soldering iron.

12. Remove the Connector-Wafer 5with using the soldering iron.

13. Remove 2 screws 6 and then remove the Gear-Cam 7.

14. Remove the Belt-Disc 8.

15. Remove 1 screw Y and then remove the PCB-SUB switch 9.

16. Remove the Switch-Micro 0 and the Connector-Header “.

17. Remove the Pulley-Motor =.

18. Remove 1 screw Q and then lift the Gear-Pulley q.

19. Remove 1 screw W and then lift the Gear-UD(2) w.

20. Lift the Gear-UD (1) E.

21. Remove 1 screw and then remove the Clamp-Wire D.

1. Remove 2 screws !.

2. Remove the PCB @ with using the soldering iron.

3. Remove the Hook #.

4. Remove four Shaft-CD$ and then remove four Rubber-CD %.

5. Remove the CD-Deck ^ and Lever-Lift & is removed automatically.

6. Remove the Shaft *.

Samsung Electronics 3-5

* Refer to U of Figure 3-5.

Disassembly and Reassembly

3-7 CD Mecha Tray

1. Remove 1 screw ! and then remove the Roulette @ .

2. Remove 6 Cushions + .

3. Remove 2 Washers # .

4. Remove the Gear-Roulette(2) $ and then remove the Gear-Roulette (1) %.

5. Remove 3 screws ^ and then remove three Cushion-Bracket & .

6. Remove 3 Cushion-Motors * .

7. Remove 2 screws ( and then remove the Motor-DC 1 .

8. Remove the Bracket-Motor ) .

9. Remove the Shaft-Motors(1) 1 .

10. Remove the Gear-Worm 2 from the Motor-DC.

11. Remove the PCB-SUB Motor(R) 3 with using the soldering iron.

12. Remove the A/S, C/wire 4 with a soldering iron.

13. Remove 1 screw 5 and then remove the connector-header 6, Sensor-Roulette 7 and the A/S, C/wire(FL) 8 with using a soldering iron.

14. Remove the PCB-SUB sensor(R) 9.

20

4

16

3

23

2

10

22

11

19

13

17

8

14

5

21

1

7

6

12

9

22

18

15

3-6

Samsung Electronics

Figure 3-6

Disassembly and Reassembly

3-8 CD Deck

1. Remove the Shaft ! .

2. Lift the P/U @ . Note : Take extreme care not to touch the surface of lens.

3. Lift the Center-ring # .

4. Remove the Spring-T/Table $ .

5. Remove the Turn-Table (M) % .

6. Remove 2 screw ^ and then remove the Spindle-Motor & .

7. Remove the Cover-Gear * by pushing the hook.

8. Remove the Gear(c) ( by pushing the hook.

9. Lift the Gear(b) ) .

10. Remove the Gear(a) 1 .

11. Remove 2 screws 2 and then remove the Feed-Motor 3 .

12. Remove the Chassis-Deck(M) 4.

3

4

5

6

12

2

1

8

9

10

11

13

14

7

Samsung Electronics 3-7

Figure 3-7

Disassembly and Reassembly

4. Alignment and Adjustments

4-1 Tuner

FM T.H.D Adjustment

SSG FREQ. 98MHz Adjustment

point FM DETECTOR COIL

(IFT2)

Minumum Distortion(Figure 4-1)

FM Search Level Adjustment

SSG FREQ. 98MHz Adjustment

point SEMI-VR(5KB)

(IVR1)

"TUNED" is shown on FLT(Figure 4-2)

FM Antenna Terminal

Speaker Terminal

Input

Figure 4-1 IF CENTER and T.H.D Adjustment

Figure 4-2 FM Auto Search Level Adjustment

Output

Distortion Meter

Oscilloscope

FM SSG

GND

26dB

75Ω Dummy

FM IN

FM Antenna

SET

5 kB

SET

Output GND

AM(MW) I.F Adjustment

SSG FREQ. 450KHz Adjustment

point AM I.F COIL

(IFT1)

Maximum output(Figure 4-3)

Figure 4-3 AM I.F Adjustment

AM ANT

60cm

IFT1

IN

AM SSG 450KHZ

Speaker Terminal

INPUT

OUTPUT

VTVM

4-1Samsung Electronics

SPEAKER JACK

L

R

FM

AM

ANT JACK

Figure 4-4

Figure 4-6

4-2 Cassette Deck

4-2-1 Test Equipment

1. Oscilloscope

2. VTVM

4-2-1(a) TAPE

1. MTT-111 (or equivalent) : Test tape on which 3KHz signal is recorded (Tape speed adjustmant)

2. MTT-5512 (or equivalent)

3. MTT-113CN (or equivalent) : Test tape on which 8KHz signal is recorded (Azimuth)

4. MTT-112B (or equivalent) : Test tape on which 1KHz signal is recorded (L.R. channel unbalance)

AZIMUTH Adjustment Screw

REC PB Head

INSET

Frequency Counter

Speaker Terminal

SET

(GND)

VTVM

V H

Figure 4-5

Oscilloscope

IN

OUT

OUTPUT

Item

Connection

Preparation

Tape speed (normal speed) adjustment

Figure 4-4

3 KHz

5200Hz ~ 6600Hz

CVR1

JPT1

Tape speed (high speed)

1) Insert MTT-111 to Deck 2.

2)Press PLAY button.

1) Insert MTT-111 to Deck 2.

2) Insert MTT-5512 to Deck1.

3) Press Hi-SPEED button.

4) Press RECORD button.

Remark

Adjustment Point

Samsung Electronics4-2

4-2-2 Location of Adjustment Points (Refer to page 4-1)

4-2-3 Adjustment Procedure

4-2-3(a) TAPE SPEED

4-2-3(b) AZIMUTH

1. DECK 1

2. DECK 2

Maximum output and identical phase of L,R channel. Set the screw after adjustment.

Item

Connection

Preparation

AZIMUTH

Figure 4-5

L-CH R-CH

0.5dB

Figure 4-6

JSVR15L

L,R unbalance

Play MTT113N in the DECK1.

Play MTT112B in the DECK1.

Remark

Adjustment Point

Item

Connection

Preparation

AZIMUTH

Figure 4-5

Figure 4-6

Play MTT113N in the DECK2.

Remark

Adjustment Point

3. Recording Frequency

85KHz

Item

Connection

Preparation

Bias oscillation frequency

LL1

Record MTT5512 in the DECK1.

Remark

Adjustment Point

Alignment and Adjustments

4-3Samsung Electronics

4-3 CD

WVR1

T.G

WVR2

F.G

WVR3

E/F. B

WVR4

F.B

Vref

0V

A

B

A=B

---100mV

---0V

---250mV

---0 V

---100mV

---0 V

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

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

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

4-3-4 To Adjust E/F Balance (PLAY 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 AP1.

4. Set WVR4 to 0mV.

1. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to AP2.

2. Load and play the disc

3. While the disc is running adjust the gain with WVR1 as shown below.

1. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to AP1.

2. Load and play the disc

3. While the disc is running adjust the gain with WVR2 as shown in the following figure.

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

Normal frequency

Low frequency

High frequency

Low frequency

High frequency

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

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

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 GND terminal of the oscilloscope to Vref and (+) terminal to center to AP2.

5. Load and play the disc.

6. Turn WVR1 counterclockwise to the minimum value.

7. Raise WVR3 and adjust the waveform so that its middle comes to GND of the oscilloscope (or until the upper half of waveform becomes symmetrical to the bottom half, A=B)

8. Adjust WVR1 (arrow) for normal sound.

Alignment and Adjustments

RF I-V Amp(1) and RF I-V Amp(2) currents are converted to voltage via internal resistance of 58k½ from the current of PD1(A+C) and PD2(B+D): These voltage 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 :

VFE = (R2/R1) x (V2-V1) = 5.4(V2-V1)

This FOCUS ERROR voltage is sent to FOCUS SERVO .

VRF = -R3 x (iPD1 + iPD2)

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

VRF = -R3 x ( + )

VRF = - x (V1 + V2)

10K 10K

V 1 V 2

10K

R3

74

Photo Detector

B

CA

D

PD1 PD2

58K

RF I-V AMP(1)

58K

10K

R2

RF I-V AMP(2)

V2

R1

10K

RF SUMMING

V1 AMP

RFO

RF

66

67

R3

75

5-1-1 RF Amp (KA9220) : NIC9220

5-1-2 FOCUS ERROR Amp(KA9220) : NIC9220

57

63

R2

174K

C1 25P

FE

FOCUS

ERROR

AMP

164K

FE Bias

GNDVcc

20K

32K

C2 25P

-(A+C)

-(B+D)

R1

V1 32K

5-1-3 FOCUS SERVO SYSTEM (KA9220) : NIC9220

When FS3 is ON, high frequency gain decreases (time constant set by pin17, pin19 ; capacitor is connected to internal resistance). The capacitor between pin 18 and GND sets the time constant to pass the low frequencies in PLAY mode.

The maximum frequency of the 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 inverted 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 pin7 changes, the phase compensation peak of the focus tracking sled servos change. (The 'op-amp' dynamic range and offset voltage also change.)

3.6K

20

21

47

48

60K

FZC

0.0022

20K

0.1UF

FDFCT

HFGD

EFR

FE2

470K

DFCT

FS4

20K 48K

58 60

62

46K

580K FS3

FSW

470K

130K

0.1UF

27

40K

6

PFSET

FS2

PHASE COMPENSATION

92K

40K

10K

3

4.7UF

FSCH

FS1

50K

5.5U 11U

VREG

180K

ISET

FCE

120K

FOCUS COIL

FSEO

FE1

61

Samsung Electronics

5-1

5-1 CD

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 FOCUS ERROR Amp. The FOCUS ERROR output 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 :

5. Special Circuit Descriptions

5-1-4 TRACKING SLED SERVO SYSTEM (KA9220) : NIC9220

The capacitor between pin 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 the tracking coil is determined by both TM3 and TM4 currents and the feed back resistance of pin 47. Track jump max voltage = TM3 (TM4) current x feedback resistance.

FWD or REV sled kick occurs when TM5 or TM6 is ON, and the peak voltage added to sled motor (determined by TM5 or TM6 current and the feedback resistance of pin 41.) Sled jump max. voltage = TM5(TM6) current x feedback resistance Each SW current is determined 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 t 5 to 40 µA for TM3. STOP is the ON/OFF detection signal for the limit SW (or the sled motor's innermost cirumference).

22 23

40 41 39

47 48

7

15

16

54

52

50

51

0.022UF

TZC

0.047UF

150K

BPF

1K 1K

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

1K

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

8

TRACKING COIL

5-2 Samsung Electronics

Special Circuit Descriptions

Samsung Electronics 6-1

6. Troubleshooting

6-1 Amplifier

6-1-1 Power Malfunction

Front PCB µ-com VDD(5V)

normal?

UIC1 pin no. 18,47,90

Replace RIC1

Main PCB RIC1(BA3950) IN: 23V

Input voltage normal?

Yes

Check the Power PCB; RD7,8,13(1N5392)

Yes

Front PCB

Does UX1(12MHz)

oscillate ?

FRONT PCB PWR-SENS

voltage normal ?

(pin no. 27 ; 5V)

Check the Main PCB RD16,RR10,11,12,RC12 RD9

Yes

Front PCB

When the power is

ON 'H' displays

at pin no. 5 ?(5V)

Yes

Connect Front PCB and Main PCB.

Check the connector Main PCB.

Wafer MCW2

No

Replace µ-com.

Yes

No

Check the Power PCB : P/T, FUSE

No

6-2 Samsung Electronics

Yes

AQ103L,R Base B+ ?

Is Mute selected ?

Headphone Jack short ?

Remove it with Remocon.

Replace Headphone jack soldering condition.

Main PCB AIC101

(STK4121,4141,4181-Option)

pin no. 9,11,12,14

B+,B- circuits

Check the B+ power source part in RD1(PBL403), RC2,3 and RIC1.

Yes

Confirm for TR short replace it.

Check if the output line is short.

No

Yes

Troubleshooting

6-1-2 No Output

Samsung Electronics 6-3

IZD1(8.2V) Voltage ok ?

Yes

Check TUNER IC(LA1836)

pin no.10 ; 8.2V pin no.14 ; 7.2V

AM ; 0V ?

Yes

LC72131

CONTROL ok?

Yes

FM VT

LC72131 pin no.20

1.7V 7.5V ?

Yes

AM VT

LC72131 pin 20

Check the LC72131

CONTROL ok?

Yes

Check HIC1

pin 20 ?

LPF1,2

output ok?

Check TDA7318 function ok?

Check FEP interior

pattern, and any line

disconnections.

 1) Power impaired

so repair defects.

2) LC72131 Oscillator (HX1 : 7.2MHz) ok ?

3) System line ok?

No

Yes

Check for µ-com IC

Replace LC72131

No

HZD1 (5.6V) Voltage ok?

HIC1 (LC72131) FM/AM BAND

Switching ok?

No

0.9V 7V

?

Power section defective

RIC1(BA3950) Voltage ok?

PIN NO.8 : 12V

Check the voltage ok ?

No

Troubleshooting

6-1-3 Tuner Malfunction (FM/AM)

6-4 Samsung Electronics

Yes

Connector inserted

correctly?

No

Yes

Check voltage : AC 4.8V

at FRONT-PCB FLT?

No

Check Main-PCB Front PCB connection and the voltage of MCW2, pins1,2(AC4.8V)

Yes

Check voltage at UIC1

pin no. 48(-30V)

No

Check the voltage of RD3(-30V)

Reinsert the connector.

Replace UIC1

6-1-4 V.F.D Malfunction

Troubleshooting

Samsung Electronics 6-5

6-2 Cassette Deck

Troubleshooting

Block Main Function Check Point

TAPE IC JIC1 (KA22291)

Convert of P/B & R/P Signal

Check for voltage at pin5

1 P/B Deck : H 2 R/P Deck : L

Check for voltage at LC2 Osc Frequency : 85kHz When inoperative : LQ4, LQ3 check

Convert of PLAY/RECORD

R/P Switching

Oscillate RECORD BIAS (85KHZ)

Check for voltage at pin no.16,8

BIAS OSC

Mode

Rec. PLAY

9V 0V

Pin no.16,8

6-6 Samsung Electronics

Check UP/DOWN MOTOR

POWER ON

Check Deck down

Check CLOSE S/W voltage

Does Roulette revolve?

Check CLOSE MOTOR and CLOSE S/W

Yes

No

Yes

No

Check Roulette Motor

Is Roulette Control ok?

Check Roulette Control Sensor

No

Yes

Is Focus Search ok?

Check oscillation of XX1

Yes

No

Does Laser function during

Focus Search?

Check WIC02 pin3 voltage during Focus Search

:5V

Replace PICK UP

Replace CXD2500Q

Replace WIC01 or WIC03

(16.9344MHz)

CLOSE condition : 0V

6-3 CD

6-3-1 Disc Revolution Malfunction

Troubleshooting

Samsung Electronics 6-7

Troubleshooting

6-3-2 Audio Output Malfunction

Yes

AQ103L,R Base B+ ?

Is Mute selected ?

Headphone Jack short ?

Remove it with Remocon.

Replace Headphone jack soldering condition.

Main PCB AIC101

(STK4121,4141,4181-Option)

pin no. 9,11,12,14

B+,B- circuits

Check the B+ power source part in RD1(PBL403), RC2,3 and RIC1.

Yes

Confirm for TR short replace it.

Check if the output line is short.

No

Yes

6-8 Samsung Electronics

Troubleshooting

O

Check voltage of PI1, CQ1 ?

O

Check oscillation of MX1, CX1 ?

O

There is no Video CD read in

X

Check connection of short

Check 8V output of Main PCB

X

Check oscillation connection condition & short

Check reset of MI1 pin50,

CI1 pin101?

Check µ-com of Main PCB

X

Check connection condition & short

O

Check communication of

MI1,CI1 ?

O

Check commucation of

CI1,RI1,RI2,RI3 ?

Lead In Mode : check data input

of CI1 pin104,105,106

X

Check MI1,CI1 connection

X

Check CI1,RI1,RI2,RI3 connection & short

Check communication of MI1

pin3,33,34,42,43 ?

Check µ-com of Main PCB

X

Check connection of short

O

& short

6-4 Video CD

6-4-1 Load In Malfunction