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
2%
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
FM
MW
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
0V
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
C
C
C
abce
d
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
b
LOADING PLATE P.SENSOR(H L)
LOADING PLATE P.SENSOR(H L)
LOADING MOTOR STOP
b
b
abce
d
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
O
Check voltage of PI1, CQ1 ?
O
Check oscillation of MX1, CX1 ?
O
O
There is no Video CD read in
XCheck connection of short Check 8V output of Main PCB
X
XCheck oscillation
connection condition
& short
Check reset of MI1 pin50,
CI1 pin101? Check µ-com of Main PCB
X
XCheck 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
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
X
XCheck connection of short
O
& short
3-2 Video CD
3-2-1 Lead In Malfunction
Troubleshooting

Samsung Electronics 3-5
O
Does the VSYNC waveform
of CI1 pin95 input to EI1
pin 7 ?
O
Check the clock of CI1 pin99
input to VEI1 pin40,
41,42 ?
O
O
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.
O
Check clock input of
EI1 pin8 ?
O
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.
O
A
3-2-2 No Field Signal and OSD
Troubleshooting

3-6 Samsung Electronics
O
O
O
O
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.
O
O
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.
O
A
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

O
Does the data abnormal
of CI1 pin107,108, 109 ?
O
Does the clock input of
AIC1 pin 5 ?
O
O
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.
O
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.
O
Samsung Electronics 3-7
3-2-4 No Sound Signal
Troubleshooting