Page 1
MICRO COMPONENT
SYSTEM
SERVICE MANUAL
MODEL: LX-U250A, LXS-U250
SERVICE MANUAL MODEL: LX-U250A, LXS-U250
Page 2
- 1-1 -
[CONTENTS]
❍ SECTION 1. GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
❍ SECTION 2. ELECTRICAL
• TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• WAVEFORMS OF MAKOR CHECK POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
• INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
• PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47
❍ SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
• SINGLE DECK MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
• CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
❍ SECTION 4. SPEAKER SECTION
• MODEL: LXS-U250, LXS-W250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
❍ SECTION 5. REPLACEMENT PARTS LIST
• REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Page 3
- 1-2 -
❏ SERVICING PRECAUTIONS
• NOTES REGARDING HANDLING OF THE PICK-UP
1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
2. Repair notes
1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and
impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or
damage to the printed-circuit board.
3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason
the adjustment point and installation screws should absolutely never be touched.
4) Laser beams may damage the eyes!
Absolutely never permit laser beams to enter the eyes!
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
5) Cleaning the lens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used
for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton
swab should be used, taking care not to distort this.
6) Never attempt to disassemble the pick-up.
Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do
not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of
this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
Storage in conductive bag
Drop impact
NEVER look directly at the laser beam, and don’t let
contact fingers or other exposed skin.
Magnet
How to hold the pick-up
Conductive Sheet
Cotton swab
Pressure
Pressure
SECTION 1. GENERAL
Page 4
- 1-3 -
• NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components
are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components
can be damaged, and for that reason components should be handled with care.
2) The pick-up is composed of many optical components and other high-precision components. Care must be
taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust.
2. Notes for repair
1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To prevent AC leakage, the metal part of the soldering iron should be grounded.
5) Workers should be grounded by an armband (1M Ω)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
CLEARING MALFUNCTION
You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).
Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of
the volume knob for more than 3 seconds.
If you reset your unit, you must reenter all its settings(stations, clock, timer)
NOTE: 1.To operate the RESET jump wire, pull the volume rotary knob and release it.
2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.
Resistor
(1 Mohm)
Conductive
Sheet
Resistor
(1 Mohm)
Armband
RESET jump wire
VOLUME
VOLUME KNOB
DOWN
UP
Page 5
- 1-4 -
❏ ESD PRECAUTIONS
• Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated
circuits and some field-effect transistors and semiconductor chip components.The following techniques should
be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive sur-
face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
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 ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device).
• CAUTION. GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO
ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT
MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.
Page 6
- 1-5 -
❏ SPECIFICATIONS
NOTE : Specification are subject to change without notice in the course of product improvement.
Page 7
- 1-6 -
Page 8
- 2-1 -
CD PART
❏ TROUBLESHOOTING GUIDE
SECTION 2. ELECTRICAL
TURN ON CD
OPEN CLOSE CHECK
“ READING ”
DISPLAY CHECK
READING OK CHECK
IF PLAY, AUDIO
OUTPUT CHECK
OK
CONNECTOR CHECK (PN806)
CHECK LC78690W (IC801)
CHECK AM5810FP (IC802)
CHECK PICKUP MOVEMENT
CONNECTOR CHECK(PN801,PN802)
CHECK MICOM INTERFACE CIRCUIT( PN805 )
CONNECTOR CHECK ( PN802, PN804, PN806 )
CHECK MICOM INTERFACE CIRCUIT( PN805 )
CHECK POWER SUPPLY CIRCUIT( PN806 )
CONNECTOR CHECK ( PN804, PN806 )
Page 9
- 2-2 -
OPEN CLOSE NG
CONNECTOR LOCKING CHECK ( PN804 )
CHECK POWER SUPPLY CIRCUIT( PN805, PN806)
PN 806 PIN 4 = 12V, PIN 5 = 6.2V
PN805 PIN 1 = 5V
CHECK VOLTAGE CHANGE OF OPEN CLOSE ,
AND IC802 INPUT VOLTAGE PIN 7, 8, 20 (=6.2V)
(PN805 PIN 2:BTL_MUTE, 14:OPEN 15:CLOSE)
DEFECTIVE MAIN
POEWR SUPPLY
DEFECTIVE MICOM
DEFECTIVE
MECHANISM
Page 10
- 2-3 -
“ READING ” DISPLAY CHECK
(= ONLY “CD “DISPLAY)
CONNECTOR LOCKING CHECK (PN802,
PN804,PN805,PN806 )
DEFECTIVE CONNECTOR OR
MAIN POWER SUPPLAY
DEFECTIVE IC804
DEFECTIVE MICOM OR
CONNECTOR
DEFECTIVE MICOM OR
CONNECTOR
DEFECTIVE IC801
CHECK VOLTAGE THE PIN 2 OF IC804
IC804 PIN 2 : 3.3V
CHECK RESET SIGNAL OF PN805
PN805 PIN 4 : 3V
CHECK POWER SUPPLY
PORT( PN805 ,PN806)
PN 806 PIN 4 = 12V, PIN 5 = 6.2V
PN805 PIN 12 = 5V
CHECK MICOM INTERFACE
CIRCUIT( PN805 )
PN805 PIN 3,4,5,6,7,8,9 SIGNAL CHECK
(3: WRQ, 4 : RESET 5 : DO, 6: DI, 7 : CL
8: CE, 9: FSEQ)
CHECK THE WAVE FORM #1
Page 11
- 2-4 -
READING OK CHECK
(= “NO DISC” DISPLAY)
CONNECTOR LOCKING
CHECK(PN801,PN802)
DOES SLED MOVE ?
DOES LENSE MOVE ?
(= UP & DOWN)
CHECK PN802 PIN 3,4( SL+,SL-)
A
B
C
D
E
CHECK PN801 PIN 13,16( FA-, FA+)
CHECK PN801 PIN 10( LD )
CHECK PN802 PIN
5,6( SP+,SP-)
CHECK PN801 PIN 14,15
(TA-, TA+)
DEFECTIVE PICKUP OR
IC802 OR IC801
DEFECTIVE PICKUP OR
IC801
DEFECTIVE PICKUP OR
IC802 OR IC801
DEFECTIVE PICKUP OR
IC802 OR IC801
DEFECTIVE PICKUP OR
IC802OR IC801
DOES LASER LIGHT ?
DOES SPINDLE ROTATE ?
IS READING OK ?
Page 12
- 2-5 -
READING OK CHECK #A
(= “NO DISC” DISPLAY)
A
DOES SL+ WAVEFORM APPEAR
AT
( IC802 PIN 13 AND PN 802 PIN 3)
WAVEFORM #2
SLED MOTOR WAVE
DOES SLIN WAVEFORM
APPEAR AT
( IC802 PIN 5)
WAVEFORM #2
SLED DRIVE WAVE
CHECK PN802 CONNECTOR LINE
DEFECTIVE IC801
DEFECTIVE IC802
DEFECTIVE PN802
CONNECTOR
DEFECTIVE PICKUP
SLED MOTOR
Page 13
- 2-6 -
READING OK CHECK #B
(= “NO DISC” DISPLAY)
B
DOES FA+ WAVEFORM APPEAR AT
( IC802 PIN 16 AND PN801 PIN 13)
WAVEFORM #3
FOCUS COIL DRIVE WAVE
DOES FAIN- WAVEFORM
APPEAR AT
( IC802 PIN 25)
WAVEFORM #3
FOCUS DRIVE WAVE
CHECK PN801 CONNECTOR LINE
DEFECTIVE IC801
DEFECTIVE IC802
DEFECTIVE PN801
CONNECTOR
DEFECTIVE PICKUP
FOCUS ACTUATOR
Page 14
- 2-7 -
READING OK CHECK #C
(= “NO DISC” DISPLAY)
C
IS ?V APPLIED TO PIN10 OF
PN501
LASER SUPPLY VOLTAGE CHECK
CHECK PN801 CONNECTOR LINE
IS 3.3 V APPLIED TO
PIN30,36,39,41,61,68,75
OF IC801
RF IC SUPPLY VOLTAGE
CHECK
IS 2.3 V PIN18 OF IC801
LASER CONTROL
VOLTAGE CHECK
DEFECTIVE IC804
DEFECTIVE IC801
DEFECTIVE Q801 OR
D801
DEFECTIVE PN801
CONNECTOR
DEFECTIVE PICKUP
LASER PART
Page 15
- 2-8 -
READING OK CHECK #D
(= “NO DISC” DISPLAY)
D
DOES SP+ WAVEFORM APPEAR
AT
( IC802 PIN 11 AND PN802 PIN 5)
WAVEFORM #4
SPINDLE MOTOR DRIVE WAVE
DOES SPIN WAVEFORM
APPEAR AT
( IC802 PIN 6)
WAVEFORM #4
SPINDLE DRIVE WAVE
CHECK PN802 CONNECTOR LINE
DEFECTIVE IC801
DEFECTIVE IC802
DEFECTIVE PICKUP
SPINDLE MOTOR
DEFECTIVE PN802
CONNECTOR
Page 16
- 2-9 -
READING OK CHECK #E
(= “NO DISC” DISPLAY)
E
DOES TA+ WAVEFORM APPEAR AT
( IC802 PIN 17 AND PN801 PIN 14)
WAVEFORM #5
TRACKING COIL DRIVE WAVE
CHECK PN802 CONNECTOR LINE
DEFECTIVE IC801
DEFECTIVE IC802
DEFECTIVE PN802
CONNECTOR
DEFECTIVE PICKUP OR
IC801
DEFECTIVE PICKUP OR
IC801
DOES ARF SIGNAL APPEAR?
(IC801 PIN 2 )
WAVEFORM #6
DOES FE, TE SIGNAL APPEAR?
(IC801 PORT FE:10, TE:16)
WAVEFORM #6
DOES TAIN- WAVEFORM
APPEAR AT
( IC802 PIN 22)
WAVEFORM #5
TRACKING DRIVE WAVE
Page 17
- 2-10 -
#1. MICOM INTERFACE WAVEFORM
(PN805 PIN 3, 4, 5, 6) during power on
PIN 6 : DI
PIN 5 : DO
PIN 4 : RESET
PIN 3 : WRQ
#1. MICOM INTERFACE WAVEFORM
(PN805 PIN 3, 4, 5, 6) during normal play
PIN 6 : DI
PIN 5 : DO
PIN 4 : RESET
PIN 3 : WRQ
#1. MICOM INTERFACE WAVEFORM
(PN805 PIN 7, 8, 9) during power on
PIN 9 : FSEQ
PIN 8 : CE
PIN 7 : CL
#1. MICOM INTERFACE WAVEFORM
(PN805 PIN 7, 8, 9) during normal play
PIN 9 : FSEQ
PIN 8 : CE
PIN 7 : CL
❏ WAVEFORMS OF MAKOR CHECK POINT
Page 18
- 2-11 -
#2. SLED DRIVE AND MOTOR WAVEFORM
(IC802 PIN 5, 13) when focus search
#3. FOCUS DRIVE AND MOTOR WAVEFORM #3. FOCUS DRIVE AND MOTOR WAVEFORM
(IC802 PIN 25, IC802 PIN 16) (IC802 PIN 25, IC802 PIN 16)
When focus search failed or there is no disc on tray There is disc on tray and focus search success
PIN 5 : SLIN
PIN 13 : SL+
PIN 25 : FAO
PIN 16 : FA+
#2. SLED DRIVE AND MOTOR WAVEFORM
(IC802 PIN 5, 13) during normal play
PIN 5 : SLIN
PIN 13 : SL+
PIN 25 : FAO
PIN 16 : FA+
Page 19
- 2-12 -
#5. TRACK DRIVE AND MOTOR WAVEFORM
(IC802 PIN 22 , IC802 PIN 17) during normal play
#4. SPINDLE DRIVE AND MOTOR WAVEFORM
(IC802 PIN 6, 11) when TOC reading
PIN 6 : SPIN
PIN 11 : SP+
PIN 22 : TAO
PIN 17 : TA+
#6. RF, FOCUS AND TRACKING ERROR WAVEFORM
(IC801 PIN 2, 10, 16) during normal play
PIN 2 : RFOUT
PIN 10 : FE
PIN 16 : TE
Page 20
- 2-13 -
USB PART
TURN ON USB
“CHECKING ”OR
“USB” DISPLAY
CHECK
READING OK CHECK
OK
CONNECTOR CHECK ( PN805, PN806, PN810 )
CHECK POWER SUPPLY CIRCUIT( PN806 )
CHECK MICOM INTERFACE CIRCUIT( PN805 )
CHECK PN810 1 PIN : 5V
CHECK PN810 PIN 2(D-), 3(D+)
CHECK OTI6888 (IC805)
CHECK LC78690W (IC801)
CONNECTOR CHECK (PN806)
IF PLAY, AUDIO
OUTPUT CHECK
Page 21
- 2-14 -
VKK CHECK
P-SENS CHECK
PN301 3Pin DC -27V CHECK
OK
ZD900 (+)VOLTAGE CHECK (5V)
IC301 26PIN PATTERN CHECK
ZD901 (-)-27V CHECK
D912(+)WAVE CHECK
D912 CHANGE
YES
YES
NO
NO
YES
Q900 TURN ON CHECK
C921(-)-27V UNDER VOLT CHECK
YES
NO
D907,D906 CHANGE
OK
VOLTAGE CHECK LIST
YES
NO
Q900 CHANGE
YES
NO
Page 22
- 2-15 -
VOLTAGE CHECK
ALL Fuse CHECK
IC901,IC902 INPUT DC VOLT CHECK
C904(+),C905(-)DC VOLT OUTPUT CHECK
D700 CHANGE
TransformerCHANGE
IC301 Troubleshooting CHECK
MUTE
YES
FUSE CHANGE
CN900 (-)1,2 PIN,(+)5,6 PIN OUTPUT VOLTAGE,D900 CHECK
YES
NO
YES
NO
NO
IC903 Output DC VOLT CHECK (6.2V)
D901,D902,D903,D904 COMPONENT CHECK AND CHANGE
Transformer CHANGE
YES
CN901 7 Pin DC VOLTOUTPUT CHECK
YES
NO
NO
IC903 Output DC VOLT CHECK (6.2V)
D908 +12V CHECK AND CHANGE
IC901 CHANGE
YES
D909,D910 VOLT CHECK
YES
YES
NO
NO
SECTION CHECK
YES
NO
IC904 CHANGE
Q500 CHECK AND CHANGE
YES
IC904 1PIN (+)High CHECK
NO
NO
Muting CIRCUIT Troubleshooting (MUTE CONDITION)
Q201,Q251,Q600,Q650 Base "High"
IC201Troubleshooting CHECK (ONLY Q201/Q251)
YES
NO
Q504 EMITTER "HIGH"(ONLY Q714/Q715)
NO
Q201,Q251,Q600,Q650 Collector "Low"
MUTE
TR CHANGE
YES
NO
Q504 CHANGE
YES
NO
Page 23
- 2-16 -
NO SOUND
IC905 17,22 PIN OUTPUT CHECK
POWER CIRCUIT CHECK
IC905 Troubleshooting VIEW
YES
NO
SPK Relay troubleshooting VIEW
YES
NO
IC905 INPUT CHECK(FUNK BLOCK INPUT CHECK)
Muting troubleshooting VIEW
YES
NO
RY700 CONTROL CHECK
OK
SPK Relay Troubleshooting (ONLY LX-W550`s)
D503 (+)12V CHECK
VOLTAGE CHECK LIST
YES
NO
RELAY CHANGE (RY700)
YES
NO
Q511 Collector "Low"CHECK
IC204 Troubleshooting
YES
NO
Q511 CHANGE
Q511 Base "High"
YES
NO
OUTPUT SOUND CHECK
OK
Page 24
- 2-17 -
FUNCTION MODE (NO SOUND)
TAPE
IC905 3,36PIN INPUT SIGNAL CHECK
IC204 Troubleshooting
YES
YES
TUNER
IC905 2,37 PIN INPUT SIGNAL CHECK
IC102 Troubleshooting
YES
YES
DAB/L BAND/DAB+L
IC905 6,33 PIN INPUT SIGNAL CHECK
IC102 Troubleshooting
YES
YES
CD
IC905 4,35 PIN INPUT SIGNAL CHECK
CD Troubleshooting
YES
YES
AUX
IC905 5,34 PIN INPUT SIGNAL CHECK
JK600 INPUT CHECK
YES
YES
Page 25
- 2-18 -
IC301 Troubleshooting
IC204 Troubleshooting
IC301 TROUBLE SHOOTING
IC301 17,46,72,90 INUT VOLT.CHECK
VOLTAGE CHECK LIST
YES
NO
IC301 26Pin 5V INPUT CHECK
P-SENS SECTION CHECK
YES
NO
X301 CHECK
X301 CHANGE
YES
NO
IC301 17Pin VOLT INPUT (Low ➝ High)
OK
RESET SECTION CHECK
YES
NO
IC204 16Pin INUT VOLT.CHECK
VOLTAGE CHECK LIST
YES
NO
IC204 2,3 Pin CLK Data CHECK
IC301 3,4Pin Data CHECK (CD,TAPE FUNCTION MODE)
YES
NO
CONTROLL FUNC.CHECK
OK
IC204 CHANGE
YES
NO
IC301 CHANGE
IC301,IC204 pattern check
YES
YES
NO
Page 26
- 2-19 -
FM(TUN600)CHECK
TUN600 2PIN 9V CHECK
VOLTAGE CHECK LIST
YES
NO
TUN600 7,8,9PIN CLOCK DATA CHECK
TUN600 3,5PIN OUTPUT CHECK
IC301 7,8,9 PIN CLOCK DATA CHECK
OK
YES
YES
NO
TUN600 CHANGE
NO
IC301 Troubleshooting
YES
IC905 Troubleshooting
FUNC CLOCK DATA 19,20PIN CHECK
VOLTAGE CHECK LIST
YES
21 PIN VOLT CHECK
EACH FUNC MODE (INPUT SIGNAL CHECK)
17,22 Pin OUTPUT SIGNAL CHECK
YES
NO
FUNC Troubleshooting
EACH FUNC MODE (INPUT SIGNAL CHECK)
YES
NO
SPK Relay SECTION CHECK
YES
NO
Page 27
- 2-20 -
PLAY MODE CHECK
IC201 46Pin VCC CHECK
VOLTAGE CHECK LIST
YES
NO
Deck Mecha CHANGE
NO
IC201 3,6 Pin Signal Output CHECK
Muting SECTION CHECK
Deck Mecha MOVE CHECK
YES
NO
IC201 CHANGE
YES
REC CHECK (Q202,Q252 ON:R220,270 HIGH)
IC203 2,8Pin INPUT SIGNAL CHECK
Q202,Q252 Base "Low"CHECK
YES
NO
IC203 3,7 Pin OUT
IC202 6(12V),4 Pin High check
IC203 6Pin VCC volt check
YES
NO
IC203 Troubleshooting
NO
Q202,Q252 CHANGE
YES
L201 2,3PIN check
Power Check,IC202 Troubleshooting
YES
NO
VOLTAGE CHECK LIST
NO
DECK CHANGE
C227(+)INPUT VOLT CHECK
YES
NO
Q205 Base 0.6V CHECK
YES
IC203 Troubleshooting
NO
Q205 Collector Low
YES
Q205 CHANGE
NO
Q204 CHANGE
YES
L201 CHANGE
NO
OK
YES
Page 28
- 2-21 -
DAB/DAB+L /L BAND(DAB600,DAB600L)CHECK
DAB600,DAB600L 4PIN 3.3V INPUT CHECK
VOLTAGE CHECK LIST
(ONLY DAB series MODEL)
YES
NO
DAB600,DAB600L 11,13PIN PIN CLOCK DATA CHECK
DAB600,DAB600L 6,8PIN OUTPUT CHECK
IC301 75,76 PIN CLOCK DATA CHECK
YES
NO
OK
DAB600,DAB600L CHANGE
YES
NO
IC301 Troubleshooting
YES
Page 29
- 2-22 -
❏ INTERNAL BLOCK DIAGRAM of ICs
• NJW1190
BLOCK DIAGRAM
Page 30
- 2-23 -
PIN FUNCTION (SSOP44)
Page 31
- 2-24 -
PIN FUNCTION (QFP48-P1)
Page 32
- 2-25 -
• IC805
BLOCK DIAGRAM
PLL
RISC
Program
RAM
Clock Divider
UHC
Interrupt
LED
USB
Transceirver
LED1~2
D-
D+
14.318MHz
I2V
Bit Stream
MP3
decoder
Input
Button
DAC
USB
device
• PIN CONFIGUARTION
GPIOA [7 ]
GPIOA [6 ]
NC
NC
NC
NC
gnd
vdd
LED1_out
NC
GPIOA [5 ]
GPIOA [4 ]
1
2
3
4
5
6
7
8
9
10
11
12
25
26
27
28
29
30
31
32
33
34
35
36
GPIOB [2 ]
NC
GPIOB [0 ]
sda
scl
NC
vdd
xtal2
xtal1
gnd
reset_b
NC
GPIOA [0 ]
GPIOA [1 ]
NC
NC
NC
vdd
gnd
NC
NC
NC
GPIOA [2 ]
GPIOA [3 ]
NC
SIC
REQ
SID
NC
vdd
DPLS_IO
DMNS_IO
gnd
GPIOB [1 ]
ext_int5
GPIOB [3 ]
1314151617181920212223
24
37
38
39
40
41
42
43
44
45
46
47
48
Page 33
- 2-26 -
PIN CONFIGUARTION
ex_romdata [5 ]
ex_romdata [6 ]
GPIOA [7 ]
GPIOA [6 ]
gnd
vdd
LED1_out
GPIOA [5 ]
GPIOA [4 ]
ex_romaddr [12 ]
ex_romaddr [11 ]
ex_romaddr [10 ]
ex_romaddr [9 ]
gnd
vdd
ex_romaddr [8 ]
ex_romaddr [4 ]
ex_romaddr [5 ]
ex_romaddr [6 ]
vdd
gnd
ex_romaddr [7 ]
GPIOA [0 ]
GPIOA [1 ]
vdd
gnd
GPIOA [2 ]
GPIOA [3 ]
GPIOB [4 ]
GPIOB [6 ]
ex_romdata [2 ]
ex_romdata [3 ]
txd1
ex_romdata [7 ]
ex_romdata [6 ]
SIC
REQ
SID
vdd
DPLS_IO
DMNS_IO
gnd
GPIOB [1 ]
host_dev_sel
gnd
ex_romaddr [15 ]
ex_romaddr [14 ]
ex_romaddr [13 ]
ex_romaddr [0 ]
ex_romaddr [1 ]
gnd
sda
scl
vdd
xtal2
xtal1
gnd
reset_b
mode0
ex_romdata [0 ]
ex_romdata [1 ]
ex_romaddr [2 ]
ex_romaddr [3 ]
rxdi1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
171819202122232425262728293031
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Page 34
- 2-27 -
• AM5810 (IC802)
BLOCK DIAGRAM
PIN CONFIGURATION
VO2 ( + )
FWD
REV
IN2
VO2 ( - )
BIAS
OPIN4 ( + )
OPIN4 ( - )
MUTE
GND
VO3 ( - )
VO3 ( + )
OPOUT4
OPIN3 ( + )
OPIN3 ( - )
OP
OUT3
POWVCC34
VO4 ( - )
VO4 ( + )
LDCONT
PS
INÅå
PREVCC
VOL ( - )
VOL ( + )
22
21
20
19
18
17
16
15
23
24
25
26
27
12
14
10
11
9
7
6
5
4
3
2
1
8
28
AM5810
POWVCC12
VO1 ( - )
VO1 ( + )
13
Page 35
- 2-28 -
PIN DESCRIPTION
Page 36
❏ BLOCK DIAGRAM
2-29 2-30
Page 37
2-31 2-32
• WMA/USB BLOCK DIAGRAM
Page 38
2-33 2-34
❏ SCHEMATIC DIAGRAMS
• MAIN SCHEMATIC DIAGRAM
Page 39
2-35 2-36
• FRONT SCHEMATIC DIAGRAM
Page 40
2-37 2-38
• POWER SCHEMATIC DIAGRAM
Page 41
2-39 2-40
• DECK SCHEMATIC DIAGRAM
Page 42
2-41 2-42
• CD SCHEMATIC DIAGRAM
Page 43
2-43 2-44
• USB SCHEMATIC DIAGRAM
Page 44
2-45 2-46
❏ WIRING DIAGRAM
Page 45
2-47 2-48
❏ PRINTED CIRCUIT DIAGRAMS
• MAIN P.C. BOARD
Page 46
2-49 2-50
• FRONT P.C. BOARD
Page 47
• CDP P.C. BOARD (COMPONENT SIDE)
2-51 2-52
Page 48
2-53 2-54
• CDP P.C. BOARD (SOLDER SIDE)
Page 49
2-55 2-56
• LINEAR POWER
Page 50
Page 51
3-1 3-2
250
252
254
253
258
256
255
257
259
450
261
262
305
A47
450
263
A46
A26
A41
260
A43
A00
301
SECTION 3. EXPLODED VIEWS
❏ CABINET AND MAIN FRAME SECTION
Page 52
3-3 3-4
013
026
403
501
020
019
404
503
023
018
012
009
011
024
025
503
027
029
001
006
030
032
031
003
007
002
008
504
038
033
034
035
036
005
039
505
037
010
028
019
016
015
014
401
402
004
504
• SINGLE DECK MECHANISM
LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION
A00 6720AF0007A "DECK,AUDIO" CMAL1Z2 ALPS L-SINGLE A/RVS
001 6768RZAA04A DECK MECHANISM PARTS FD58P- ALPS ARM PLAY
002 6768RZBA04A DECK MECHANISM PARTS FF19U-31 ALPS BELT/FELT A/R A/
003 6768RZBA05A DECK MECHANISM PARTS FF19S-31 ALPS BELT/FELT A/R
004 6768RZEA01A DECK MECHANISM PARTS F513-927 ALPS HEAD ASSY A/R
005 6768RZGA03A DECK MECHANISM PARTS F522-063 ALPS GEAR A/R A/S
006 6768RZGA04A DECK MECHANISM PARTS FD58M- ALPS GEAR CAM
007 6768RZJA03A DECK MECHANISM PARTS FR26D- ALPS PULLEY/FLYWHEEL AS
008 6768RZJA04A DECK MECHANISM PARTS FR25M- ALPS PULLEY/FLYWHEEL AS
009 6768RZMA02A DECK MECHANISM PARTS FD53M- ALPS MOLD REEL
010 6768RZQA03A DECK MECHANISM PARTS F525-381 ALPS MOTOR(ASSY) A/R
011 6768RZRA01A DECK MECHANISM PARTS F514-133 ALPS ROLLER A/R
012 6768RZRA02A DECK MECHANISM PARTS F514-134 ALPS ROLLER A/R
013 6768RZXA02A DECK MECHANISM PARTS F567-726 ALPS SPECIAL A/R
014 6768RZPA03A DECK MECHANISM PARTS F512-128 ALPS PRESS PLATE BASE
015 6768RZPA02A DECK MECHANISM PARTS F512-127 ALPS PRESS PLATE BASE
016 6768RZSA01A DECK MECHANISM PARTS FK32T- ALPS SPRING HB
017 6768RZPA04A DECK MECHANISM PARTS FC61K- ALPS PRESS HEAD BASE
018 6768RZSA04A DECK MECHANISM PARTS FK32U- ALPS SPRING REEL L
019 6768RZSA02A DECK MECHANISM PARTS FK32N- ALPS SPRING INTERLOCK L
020 6768RZAA05A DECK MECHANISM PARTS FC61P- AKPS ARM INTERLOCK L
023 6768RZMA04A DECK MECHANISM PARTS FD52W- ALPS MOLD REEL BASE RVS
024 6768RZSA05A DECK MECHANISM PARTS FK32V- ALPS SPRING REEL R
025 6768RZMA03A DECK MECHANISM PARTS FD52W- ALPS MOLD REEL BASE
026 6768RZSA03A DECK MECHANISM PARTS FK34Y- ALPS SPRING B/C
027 6768RZSA03A DECK MECHANISM PARTS FK34Y- ALPS SPRING B/C
028 6768RZPA05A DECK MECHANISM PARTS F612-234 ALPS PRESS CHASSIS BA
029 6768RZGA05A DECK MECHANISM PARTS FD53K- ALPS GEAR PLAY(A)
030 6768RZMA05A DECK MECHANISM PARTS FD59F- ALPS MOLD BUSH
031 6768RZVA01A DECK MECHANISM PARTS F765-303 ALPS SOLENOID BLK
032 6768RZVA02A DECK MECHANISM PARTS FL41S- ALPS SOLENOID PLUNGER
033 6768RZPA07A DECK MECHANISM PARTS FC65W- ALPS PRESS LEVER F/R
034 6768RZSA07A DECK MECHANISM PARTS FK35K- ALPS SPRING CAM
035 6768RZPA06A DECK MECHANISM PARTS FC61L- ALPS PRESS PLATE SLIDE
036 6768RZGA06A DECK MECHANISM PARTS FD60L- ALPS GEAR FF(E)
037 6768RZMA06A DECK MECHANISM PARTS FD58T- ALPS MOLD LEVER BRAKE
038 6768RZSA08A DECK MECHANISM PARTS FK35E- ALPS SPRING ARM F/R
039 6768RZJA06A DECK MECHANISM PARTS FD60B- ALPS PULLEY/FLYWHEEL AS
401 6768RZCA01A DECK MECHANISM PARTS KG194E36A ALPS SCREW 2.0X6
402 6768RZCA02A DECK MECHANISM PARTS KG194E34A ALPS SCREW 2.0X4
403 6768RZCA03A DECK MECHANISM PARTS KG194E28 ALPS SCREW 2.6X4
404 6768RZCA04A DECK MECHANISM PARTS FG114E14A ALPS SCREW 2.6X5
501 6768RZWA01A DECK MECHANISM PARTS FC67N- ALPS WASHER BRACKET DEC
502 6768RZWA02A DECK MECHANISM PARTS UJ16F- ALPS WASHER 1.75X0.4
503 6768RZWA03A DECK MECHANISM PARTS FJ111-35 ALPS WASHER 4.1X0.25
504 6768RZWA04A DECK MECHANISM PARTS FJ111-30 ALPS WASHER 2.6X0.25
505 6768RZWA05A DECK MECHANISM PARTS FJ111-17 ALPS WASHER 1.7X0.25
Page 53
3-5 3-6
• CD MECHANISM
430
430
012
430
012
430
018
014
013
017
020
011
015
431
012
430
012
026
A03
A02
001
429
429
004
002
003
A01
LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION
A26 6721RJ0570A DECK ASSEMBLY,AUDIO HOME LX-W550(W250)/LF-U850-HZ
A01 4860RB0002B CLAMP HOME CDM-H1503 MOLD CLAMP ASSY
A02 4405RCD002A MECHANISM ASSEMBLY MAIN LOADING CDM-310 CDP
A03 6717R-A002A PICK UP ASSEMBLY CMS-D77SG6 SAMSUNG TOP LOADING
001 3550SB0001A COVER HOME PLATE PRESS (CDM-H1303)
002 524-012AAAA COVER HOME CLAMP MAGNET OTHER (030X
003 4860RB0002A CLAMP HOME CDM-H1503 MOLD DISC
004 4930R-0526A HOLDER HOME CDM-310 MOLD CLAMP
011 3040R-0073A BASE P/U (CDM-300)
012 5040R-0131A RUBBER HOME CDM-310 OTHER DAMPER
013 4400R-0006B BELT DECK/MECHA DP2-5, DP7C,DP7A OT
014 4470R-0055A GEAR PULLEY
015 6871RC2016A PWB(PCB)ASSEMBLY,CD LOADING(CDM-300)
017 4470R-0056A GEAR LOADING
018 4974R-0023A GUIDE UP/DOWN
020 3040R-M059A BASE MAIN CDM-310 MOLD
026 3390R-0028A TRAY HOME CDM-310 MOLD DISC
429 1SZZR-0012A SCREW,DRAWING B-TITE
430 6756SBX001A CD MECHANISM PARTS SCREW 2.6X10X10XFZMY CDM-H813
431 1SZZH-1007B SCREW,DRAWING + D2.0 6MM SWRCH16A/ZNBK 4MM 1
Page 54
- 4-1 -
❏ MODEL: LXS-U250
850
851
860
852
857
856
855
854
853
861
SECTION 4. SPEAKER SECTION
Page 55
- 4-2 -
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