Samsung MAX-673V User manual

©Samsung Electronics Co., Ltd. Oct. 1996. Code No. AH68-20134A

6+1 CD CHANGER MINI COMPONENT

1. Product Specifications

2. Alignment and Adjustment

3. Troubleshooting

4. Exploded Views and Parts List

5. Electrical Parts List

6. Block Diagrams

7. PCB Diagrams

8. Wiring Diagram

9. Schematic Diagrams

SERVICE Manual

6+1 CD CHANGER VIDEO CD

MINI MINI COMPONENT

MAX-673V

CONTENTS

This service manual is based on Model MAX-670 (Code No. AH68-20108A).

The differences as compaired with Model MAX-670.

- Video CD is added.

1. Product Specifications

Power source

Power consumption

Dimensions (mm)

220V

280W

270(W) x 317(H) x 333(D)

Power output

Total harmonic distortion

Frequency range

Signal to noise ratio

Channel separation

Input sensitivity

Frequency range

Usable sensitivity

Signal to noise ratio

Middle frequency

Total harmonic distortion

Separation (Stereo)

Frequency range

Usable sensivity

Signal to noise ratio

Middle frequency

Total harmonic distortion

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

1µV

62dB

60dB

0.45%

35dB

522 ~ 1611KHz

600µV

40dB

30dB

125Hz ~ 12.5KHz

0.15%

60dB

40dB

2.5%

20Hz ~ 20KHz(¡1dB)

95dB(1kHz 0dB)

75dB(1kHz 0dB)

0.05%(1kHz 0dB)

90W/CH(6Ω) (T.H.D 1%)

10%

20Hz ~ 20kHz

75dB

50dB(1KHz)

AUX 400mV

General

Amp

Tuner

Cassette Deck

Compact Disc

Samsung Electronics 1-1

* Specifications are subject to change without notice.

2-1Samsung Electronics

2. Alignment and Adjustment

2-1 CD

WVR1

T.G WVR2

F.G WVR3

E/F. B WVR4

F.B

Vref

A=B

---100mV

---0V

---250mV

---0 V

---100mV

---0 V ---0 V ---0 V

---0 V

2-1-1 To Adjust FOCUS BIAS(STOP mode)

2-1-3 To Adjust Focus Gain (PLAY mode)

2-1-2 To Adjust Tracking Gain (PLAY mode)

2-1-4 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 ground 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 ground 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

Normal frequency Low frequency High frequency

Low frequency High frequency

VOLT/DIV : 0.1V

TIME/DIV : 2mS

VOLT/DIV : 0.1V

TIME/DIV : 2mS

VOLT/DIV : 0.1V

TIME/DIV : 2mS

VOLT/DIV : 0.2V

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 ground 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 ground 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.

Samsung Electronics 3-1

3. Troubleshooting

3-1 Operation of Mechanism

3-1-1 Load Operation

PICK-UP LIMIT SW (ON OFF)

PICK-UP UNIT SW (DOWN)

DISC CASE P.SENSOR(L)

LOAD

LOADING PLATE P.SENSOR(H L)

LOADING MOTOR STOP

LOADING MOTOR (CCW)

30mS (BRAKE)

LOADING MOTOR STOP 40mS

LOADING MOTOR (CCW)

LOADING PLATE P.SENSOR(L H)

LOADING MOTOR STOP 30mS

LOADING MOTOR (CW)

LOADING PLATE P.SENSOR(H L)

LOADING MOTOR STOP

END

abce

LOADING MOTOR(CW)

PICK-UP LIMIT SW (ON OFF)

PICK-UP DRIVE UNIT SW (DOWN)

DISC CASE P.SENSOR(L)

LOADING MOTOR (CCW)

UNLOAD

LOADING MOTOR (CCW)

UNLOAD LIMIT SW (ON)

LOADING MOTOR (CW)

UNLOAD LIMIT SW (OFF)

LOADING MOTOR (CW)

LOADING PLATE P.SENSOR(L H)

LOADING MOTOR (CCW)

END

LOADING PLATE P.SENSOR(H L)

LOADING MOTOR STOP

abce

3-2 Samsung Electronics

3-1-2 Unload Operation

Troubleshooting

PICK-UP LIMIT SW (ON OFF)

UP/DOWN MOTOR (CCW)

PICK-UP DRIVE UNIT SW(DOWN)

UP/DOWN MOTOR STOP

OPEN

OPEN SW (LOW)

LOADING MOTOR STOP

LOADING MOTOR (CW)

END

Samsung Electronics 3-3

3-1-3 Open Operation

Troubleshooting

3-4 Samsung Electronics

Check voltage of PI1, CQ1 ?

Check oscillation of MX1, CX1 ?

There is no Video CD read in

XCheck connection of short Check 8V output of Main PCB

XCheck oscillation

connection condition

& short

Check reset of MI1 pin50,

CI1 pin101? Check µ-com of Main PCB

XCheck connection condition

& short

Check communication of

MI1,CI1 ?

Check commucation of

CI1,RI1,RI2,RI3 ?

Lead In Mode : check data input

of CI1 pin104,105,106

XCheck MI1,CI1 connection

XCheck CI1,RI1,RI2,RI3

connection & short

Check communication of MI1

pin3,33,34,42,43 ? Check µ-com of Main PCB

XCheck connection of short

& short

3-2 Video CD

3-2-1 Lead In Malfunction

Troubleshooting

Samsung Electronics 3-5

Does the VSYNC waveform

of CI1 pin95 input to EI1

pin 7 ?

Check the clock of CI1 pin99

input to VEI1 pin40,

41,42 ?

There is no field signal and OSD

XCheck connection condition

of CI1, EI1 & short

XCheck CI2 and short.

Check R.G.B waveform input

of VEI1 pin 5,7,9 ? XCheck R.G.B data input of

CI1,VEI1 and short.

Check clock input of

EI1 pin8 ?

Check EI1 pin19 input to

NT : "L", PAL : "H"?

XCheck OI2,OI3 and

connection condition

XCheck MI1 pin39 and EQ1.

Check R.G.B waveform input

of EI1 pin12,13,14 ? XCheck SI1 and short.

3-2-2 No Field Signal and OSD

Troubleshooting

3-6 Samsung Electronics

XCheck circuit of EI1 and short

XCheck connection condition

of OI1,EI1 and short.

Does the

communication

between OT1 pin 2,3,6,7 & MI1

perform normally ?

XCheck connection condition

of OI1, MI1 and short.

Does the video waveform output

of OI1 pin15 ?

XCheck circuit of OI2,OI3

and connection condition

XCheck circuit of OI1

and short

Does the clock of OI1 pin 20

perform input normally? XCheck OI2,OI3 and short.

Does the video waveform output

of EI1 pin2 ?

Does the video waveform input

of OI1 pin13 ?

Does the clock of OI1 pin 4

perform input normally?

Check action of OQ1,

OQ2, OQ3.

3-2-3 No Field Signal and OSD (Continued)

Troubleshooting

Does the data abnormal

of CI1 pin107,108, 109 ?

Does the clock input of

AIC1 pin 5 ?

There is no sound signal.

XCheck connection of CI1,

AI1 and short

XCheck connection of wafer

and short.

Check the audio signal

output of AI1 pin13,16? XCheck circuit of AI1 and

short.

Does the audio signal output

of ALQ1, ARQ1 collector?

Check output wire.

XCheck the mute of

MIC1 pin18.

Does the audio signal output

of ALI1 pin1 , ARI1 pin1 ? XCheck circuit of ALI1, ARI1

and short.

Samsung Electronics 3-7

3-2-4 No Sound Signal

Troubleshooting

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