LG LX-D2640 Below you will find brief product information for LG LX-D2640. This stylish DVD micro home theater system gives you an immersive audio experience with its 110W of power. It features an FM/AM tuner, a DVD player, and a tape deck, allowing you to enjoy a variety of media formats. The system also includes two speakers for stereo sound. With its sleek design and easy-to-use controls, the LG LX-D2640 is a great choice for any home entertainment system.
LG LX-D2640 Below you will find brief product information for LG LX-D2640. This stylish DVD micro home theater system gives you an immersive audio experience with its 110W of power. It features an FM/AM tuner, a DVD player, and a tape deck, allowing you to enjoy a variety of media formats. The system also includes two speakers for stereo sound. With its sleek design and easy-to-use controls, the LG LX-D2640 is a great choice for any home entertainment system.
STYLISH DVD MICRO
HOME THEATER SYSTEM
SERVICE MANUAL
P/N : 3829RAT115B AUGUST, 2004
MODEL: LX-D2640, LXS-D2640W
SERVICE MANUAL MODEL: LX-D2640, LXS-D2640W
- 1-1 -
[CONTENTS]
❍ SECTION 1.GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
❍ SECTION 2.ELECTRICAL SECTION
• TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• IC/TR VOLTAGE & PIN DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
• PRINTED CIRCUIT BOARD DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
❍ SECTION 3.DVD PART
• DVD ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
• SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
• PRINTED CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
❍ SECTION 4. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION (D2640) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
• CABINET AND MAIN FRAME SECTION (DP2640) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
• TAPE DECK MECHANISM: SINGLE AUTO REVERSE DECK . . . . . . . . . . . . . . . . . . . . . . . 4-5
• TAPE DECK MECHANISM: SINGLE AUTO DECK (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . 4-7
• DECK Mechanism Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
❍ SECTION 5. SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
• LXS-D2640W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
❍ SECTION 6. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
• MODEL : LX-D2640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1~6
• MODEL : LX-DP2640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7~23
- 1-2 -
SECTION 1. GENERAL
❏ 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
- 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 magnet-
ism 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 sta-
tic 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
- 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 gen-
erate 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 “DAN-
GEROUS 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.
- 1-5 -
❏ SPECIFICATIONS
General Section
Power supply Refer to the main label.
Power consumption 110W
Amplifier Section
FM Tuning Range 87.5 - 108.0 MHz or 65 -74 MHz, 87.5 -108.0 MHz
Intermediate Frequency 10.7 MHz
Signal to Noise Ratio 60/55 dB (Mono/Stereo)
AM Tuning Range 522 - 1611 kHz or 530 - 1610 kHz or 530 - 1720 kHz
Intermediate Frequency 450 kHz
Signal to Noise Ratio 35 dB
Output Power 60W + 60W (6Ω / 2ch THD 10 %)
T.H.D 0.15%
Frequency Response 40 - 20000 Hz
Signal-to-noise ratio 80 dB
Mass 6.0kg
External dimensions (W x H x D) 170 x 340 x 243 mm
Tuner/Cassette tape player/DVD/VCD/CD player Section
Mass 4.0kg
External dimensions (W x H x D) 170 x 340 x 243 mm
DVD/VCD/CD player
Frequency response (audio) 200 - 18000 Hz
Signal-to-noise ratio (audio) More than 70 dB (1 kHz)
Signal-to-noise ratio (video) More than 60 dB (1 kHz)
Dynamic range (audio) More than 70 dB
Video output 1.0 V (p-p), 75 Ω
S-video output (Y) 1.0 V (p-p), 75 Ω
(C) 0.3 V (p-p), 75 Ω
Cassette tape player
Tape Speed 3 kHz ± 3%
Wow Flutter 0.25% (MTT -111, JIS-WTD)
F.F/REW. Time 120sec (C-60)
Frequency Response 125 - 8000Hz
Signal to Noise Ratio 43dB(P/B)/43dB(R/B)
Channel Separation 50dB(P/B)/45dB(R/P)
Erase Ratio 55dB (MTT-5511)
Speaker Section
Type 2 Way 3 Speaker
Impedance 6 Ω
Frequency Response 65 - 20000 Hz
Sound Pressure Level 86 dB/W (1m)
Rated Input Power 60 W
Max. Input Power 120 W
Net Dimensions (W x H x D) 260X470X235.5mm
Net Weight 4.8 kg
- 1-6 -
MEMO
- 2-1 -
SECTION 2. ELECTRICAL
P-SENS PART CHECK
ZD 601(+) Voltage check
IC301 26PIN PATTERN Check
D602(+) rectification waveform check
ZD601 replacement
D602 Replacement
VKK CHECK
PN601 31pin -27V check
Pattern check front pcb Ass’y
C668(-) DC -32V check
D602(-) DC -27V check
A601 EMITTER DC -27V check
Pattern check
D603, D605 replacement
Q601 replacement
ZD602 check replacement
❏ TROUBLESHOOTING GUIDE
YES
ON
YES
YES
YES
YES
YES
ON
ON
ON
ON
ON
- 2-2 -
POWER CHECK
Every kinds of Fuse check
C916(-), C917(+) DC power output check
IC905 output DC 5.6V power check
IC907, 912 Output DC power check
IC908 Output DC power check
normal operation
IC904, IC909, (IC906) Output
DC +12V/(-12V) power check
Fuse replacement
PN900, 8, 9 AC voltage output check
PN901 5, 7 PIN DC power check
IC904, IC909, IC906 replacement, PATT check
D911, 912, 913, 914 check replacement
Transformer replacement
System cable check
IC904 replacement
IC501 replacement
System cable check
C902(+) DC power check
IC902 replacement PATT check
IC501 pin8 “H” check
Ic907, 912 replacement, PATT check
PN901 pin7 DC power check
IC908 replacement, PATT check
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
- 2-3 -
Muting circuit Troubleshooting (if MUTE)
Q700, Q750, Q720, Q770, Q730 Base “LOW”
Q700, Q750, Q720, Q770, Q730 collector “Low”
MUTE
Q783, Q784, Q785 “E” High check
Each appropriate TR replacement
IC703 5, 6, 7 pin High check
IC703 Troubleshooting check
PATT check
IC702 pin10, 14 pin signal input check
IC701 pin8, 12, 13 signal input check
IC701 pin10 “High” check
IC701 Power check replacement
IC702 pin12 “High” check
IC702 power check replacement
Q702 Base “H” check
Q720/Q770/Q730
Base “L” check
Q702 Base “H” check
No sound
Ic702 pin 4, 6 signal output check
Realy connected check
R781 voltage check
Q780 Base “H” check
Speaker connected check
Speaker connected check
IC701 pin3, 4, 15 signal output check
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
- 2-4 -
Specific FUNCTION MODE has no sound
TAPE
Refer
IC201 Troubleshooting
IC603 pin4, 11 signal input check
AUX/AUX2
IC603 pin1, 12/pin5, 14 signal input check
JK601 signal input check
CD
IC601 pin3, 26 signal input check
PN602 pin15, 17 signal input check
TUNER
IC603 pin2, 15 signal input check
Refer to Tuner pack troubleshooting
YES
YES
YES
YES
YES
YES
YES
YES
- 2-5 -
IC301 Troubleshooting
C301 pin31, 32, 51, 88 power applied check
IC301 pin6 PIN P-SENS “High” check
X301 oscilates or not
When IC301 pin92 voltage input. High
➞
Low
➞
High
IC301 replacement
Refer to power supply check
P-SENS terminal check
X301 replacement
RESET circuit check
IC601 Troubleshooting
IC601 pin1 power check
IC601 pin13, 14 CLK Data signal check
IC601 FUNCTION SELECTIOR check
normal operation
Refer to power supply check
IC301 pin13, 14 pin data check
(CD, TAPE FUNCTION replacement)
PATTERN check
IC601 replacement
Refer to IC301 troubleshooting
YES
YES
YES
YES
YES
YES
YES
YES
ON
ON
ON
ON
ON
ON
ON
ON
- 2-6 -
Tuner pack power check
TU601 pin2 +9v power check
PN602 pin4 GND check
C675(+) DC power check
Pattern check
Tuner pack replacement
Refer to IC909 troubleshooting
Tuner pack Troubleshooting
PLL -CE, DI, DO, CLK check
operation check
normal operation
PLL_CEL: Chip Enable
DI: Data input
DO: Data output
CLK: Tuner mode clock
PLAY check (KIA6289N)
IC202 4Pin VCC power applied
IC201 3,6 Pin signal output check
Q209, 259 Base Low check
Refer to power supply check
Deck Mecha operation performance check
Deck Mecha replacement
IC202 replacement
YES
YES
YES
YES
YES
YES
YES
ON
ON
ON
ON
ON
ON
- 2-7 -
Rec check (Q252, Q202 ON : R273, R223 High)
IC203 pin2, 8 signal input chek
IC203 pin3, 7 output check
L201 pin5 power check
L201 pin1, 3
oscilates
check
Deck replacement
Q202, Q252 Base "Low" check
IC501 pin9 “L” check
IC203 pin6 VCC power check
Power trouble check
C227(+) power input check
Refer to power check
R228 10V check
L201 replacement
Q204, Emitter oscilates check
R212 R262 oscilates wave check
Pattern check
Q202, 252 replacement
YES
YES
YES
YES
YES
YES
YES
YES
ON
ON
ON
ON
ON
ON
ON
ON
- 2-8 -
❏ IC/TR VOLTAGE & PIN DESCRIPTION
SYSTEM CONTROL PART.
1. MICOM LC87F67C8A
Pin NO. Symbol Description (V) Remarks
1 P04 RDS CLK RDS IC Clock PORT 0.6
2 P05 DVD-CE DVD CE supply PORT. 0.2
3 P06 REMOTE REMOCON SIGNAL INPUT PORT. 4.4
4 P07 T-MUTE TUNER MUTE Control PORT. 0
5 P10 A8 NC -
6 P11 P_SENS P-SENS signal input PORT. 4.7
7 P12 VOL B VOL DATA B INPUT PORT. 4.9
8 P13 VOL A VOL DATA A INPUT PORT. 4.9
9 P14 DVD-CLK DVD CLK SIGNAL SUPPLY PORT. 4.9
10 P15 DVD_DATA DVD DATA SIGNAL SUPPLY PORT. 3.1
11 P16 AUDIO-DTAT DVD AUDIO DATA PORT 4.7
12 P17 DVD-RESET DVD Reset PORT 4.6
13 P30 FUN_DA FUNCTION IC DATA SIGNAL SUPPLY PORT. 0
14 P31 FUN_CLK FUNCTION IC CLK SIGNAL SUPPLY PORT. 0
15 P32 VOL-DATA DVD VOL DATA PORT 0
16 P33 VOL-CLK DVD VOL CLK PORT 0
17 A0 KEY 1 KEY SIGNAL (AD) INPUT PORT. 4.9
18 A1 KEY2 KEY SIGNAL (AD) INPUT PORT. 4.9
19 A2 AMP(FR)KEY AMP FRONT KEY SIGNAL (AD) INPUT PORT. 4.9
20 A3 DK-LEAF DECK NORMAL OPERATION SIGNAL (AD) INPUT PORT. 4.9
21 A4 SPEANA SIGNAL SENS. FOR LEVEL METER 0
22 A5 SCORE - 0
23 A6 HP-SENS HP-SENS INPUT PORT 0.4
24 A7 NC - -
25 PGM HALL DECK Counter signal input PORT. 4
26 D5 NC - 0
27 D6 NC - 0
28 D7 NC - 0
29 VSS2 VSS2 VSS 0
30 GND GND GND 0
31 VAREF VDD2 DC +5V 4.9
32 VDD VDD4 DC +5V 4.9
33 V0 FL01 FLT Grid voltage control signal output PORT. -25
34 V1 FL02 FLT Grid voltage control signal output PORT. -25
35 V2 FL03 FLT Grid voltage control signal output PORT. -25
36 V3 FL04 FLT Grid voltage control signal output PORT. -25
37 V4 FL05 FLT Grid voltage control signal output PORT. -25
38 V5 FL06 FLT Grid voltage control signal output PORT. -25
39 V6 FL07 FLT Grid voltage control signal output PORT. -25
40 V7 FL08 FLT Grid voltage control signal output PORT. -25
41 V8 FL09 FLT Grid voltage control signal output PORT. -25
42 V9 FL10 FLT Grid voltage control signal output PORT. -25
43 V10 FL11 FLT Plate voltage control signal output PORT. -25
44 V11 FL12 FLT Plate voltage control signal output PORT. -25
45 V12 FL13 FLT Plate voltage control signal output PORT. -25
46 V13 FL14 FLT Plate voltage control signal output PORT. -25
47 V14 FL15 FLT Plate voltage control signal output PORT. -27
48 V15 FL16 FLT Plate voltage control signal output PORT. -11.6
49 V16 FL17 FLT Plate voltage control signal output PORT. -19.2
50 V17 FL18 FLT Plate voltage control signal output PORT. -22
- 2-9 -
Pin NO. Symbol Description (V) Remarks
51 VDD VDD3 DC +5V 4.8
52 V18 FL19 FLT Plate voltage control signal output PORT. -24
53 V19 FL20 FLT Plate voltage control signal output PORT. -16.7
54 V20 FL21 FLT Plate voltage control signal output PORT. -14
55 V21 FL22 FLT signal output PORT./ D5640/2640 -22
56 V22 FL23 FLT signal output PORT./ DTS -17
57 V23 FL24 FLT signal output PORT./ P-SAVE -14
58 V24 FL25 FLT signal output PORT./ DECK A-STOP -19
59 V25 FL26 FLT signal output PORT./ AREA-1 -27
60 V26 FL27 FLT signal output PORT./ AREA-2 -24
61 V27 FL28 FLT signal output PORT./ AREA-3 -21
62 V28 FL29 FLT signal output PORT./ FM STEP 100K/50K -14.5
63 V29 FLT signal output PORT./ AM STEP 9K/10K -27
64 V30 FLT signal output PORT./ RDS -27
65 V31 FLT signal output PORT./ COLON -27
66 V32 OPTION OPTIO DATA INPUT PORT. 2.3
67 V33 NC - 0
68 V34 NC - 0
69 V35 NC - 0
70 V36 NC - 0
71 V37 NC - 0
72 V38 NC - 0
73 V39 NC - 0
74 V40 EXP1-DO EXPENDER IC DATA SIGNAL SUPPLY PORT. 0
75 V46 EXP1-CLK EXPENDER IC CLK SIGNAL SUPPLY PORT. 0
76 V45 EXP2-CLK EXPENDER IC CLK signal supply PORT. 0
77 V44 EXP2-DO EXPENDER IC DATA signal supply PORT. 0
78 V43 MIC_SENS MIC_SENS signal input PORT. 0
79 V42 LED-CTL LED CONTROL. PORT 4.7
80 V41 BEAT-CUT TUNER BEAT CUT circuit Control PORT. 0
81 V47 MOTOR DECK Motor Power Control 0.14
82 V48 SOL MD Solenoid Control 0.14
83 V49 NC - 0
84 V50 NC - 0
85 V51 NC - 0
86 V52 NC - 0
87 VKK VKK VKK -27V INPUT PORT -27
88 VDD VDD1 DC +5V 4.8
89 XIN CF1 MAIN Crystal(12.5 MHz) OSCILATES signal input PORT. 0
90 VSS VSS1 GND -1.7
91 XOUT CF2 MAIN Crystal(12.5 MHz) OSCILATES signal output PORT. -1.6
92 RESET RESET MICOM Reset PORT 4.8
93 XTIN XT1 TIME Crystal(32.768 KHz) OSCILATESsignal input PORT. 2.3
94 XTOUT XT2 TIME Crystal(32.768 KHz) OSCILATESsignal output PORT. 2.5
95 TEST NC - 0
96 P20 PLL-CE TUNER PLL IC ø° CE signal supply PORT. 0
97 P00 PLL-CLK TUNER PLL IC ø° CLK signal supply PORT. 0
98 P01 PLL-DI TUNER PLL IC DATA INPUT PORT. 3
99 P02 PLL-DO TUNER PLL IC ø° DATA signal supply PORT. 0
100 P03 RDS-DATA RDS DATA signal input PORT. 0.5
- 2-10 -
MAIN PART
1. FUNCTION IC TDA7468D IC601
Pin NO. Symbol Description (V) Remarks
1 VDD DC +9V DC 11V 10
2 MIC MIC MIC signal input PORT. 5 I
3 IN-L1 TAPE-L TAPE L-CH signal input PORT. 5 I
4 IN-L2 TUNER-L TUNER L-CH signal input PORT. 5 I
5 IN-L3 AUX-L AUX L-CH signal input PORT. 5 I
6 IN-L4 CD-L CD L-CH signal input PORT. 5 I
7 MUX-L MUX-L L-CH REC signal output PORT. 5 O
8 IS-L IS-L L-CH SURROUND signal input PORT. 5 I
9 TREBLE-L TREBLE-L L-CH TREBLE driving external constant PORT. 5 O
10 BASS I-L BASS I-L L-CH BASS driving external constant PORT. 5 I
11 BASS O-L BASS O-L L-CH BASS driving external constant PORT. 5 O
12 OUT-L OUT-L Function IC L-CH finer OUTPUT PORT. 5 O
13 DGND DGND DGND 0
14 SCL SCL CLOCK signal input PORT. 0 I
15 SDA SDA DATA signal input PORT. 0 I
16 ALC ALC ALC TIMING driving external constant PORT. 5 O
17 OUT-R OUT-R Function IC R-CH finer OUTPUT PORT. 5 O
18 BASS O-R BASS O-R R-CH BASS driving external constant PORT. 5 O
19 BASS I-R BASS I-R R-CH BASS driving external constant PORT. 5 I
20 TREBLE-R TREBLE-R R-CH TREBLE driving external constant PORT. 5 O
21 IS-R IS-R R-CH SURROUND signal input PORT. 5 I
22 MUX-R MUX-R R-CH REC signal output PORT. 5 O
23 IN-R4 CD-R R-CH CD signal input PORT. 5 I
24 IN-R3 AUX-R R-CH AUX signal input PORT. 5 I
25 IN-R2 TUNER-R R-CH TUNER signal input PORT. 5 I
26 IN-R1 TAPE-R R-CH TAPE signal input PORT. 5 I
27 CREF CREF Repple Rejection Capacitor connected PORT. 5 -
28 GND GND GND 0
2. NJM2267M IC605
1 Vin 1 - Input Clamp Terminal 1.9
2 GND GND GND 0
3 Vsag 1 - SAG Correction 1.6
4 Vout 1 - Video Output1 1.5
5 Vout 2 Vout 2 Video Output1 1.5
6 Vsag 2 Vsag 2 SAG Correction 1.6
7 VCC VCC Supply Voltage 4.9
8 Vin2 Vin2 Input Clamp Terminal 1.9
3. TC4052 IC603
1 AUX1_R AUX1SIGNAL _ R-CH INPUT PORT. 0
2 GND GND 0
3 OUT_1 AUXSIGNAL _ R-CH OUTPUT PORT. 0
4 GND GND 0
5 AUX2_R AUX2SIGNAL _ R-CH INPUT PORT. 0
6 GND GND 0
7 VSS DC -6V -6
8 GND GND 0
9 GND GND 0
10 AUX1/2 MICOM CONTROL PORT. 0
11 GND GND 0
12 AUX1_L AUX1SIGNAL _ L-CH INPUT PORT. 0
13 OUT_L AUXSIGNAL _ L-CH OUTPUT PORT. 0
14 AUX2_L AUX2SIGNAL _ L-CH INPUT PORT. 0
15 GND GND 0
16 VDD DC +6V 5.9
- 2-11 -
Pin NO. Symbol Description (V) Remarks
4. NJM4580 IC610
1 OUT A A_CH AMPOUTPUT 0
2 - IN A A_CH NF INPUT 0
3 + IN A A_CH INPUT 0
4 VSS GND GND -12
5 + IN B B_CH INPUT 0
6 - IN B B_CH NF INPUT 0
7 OUT B B_CH AMPOUTPUT 0
8 VDD VDD DC +12V 12
5. NJM4580 IC608
1 OUT A A_CH AMPOUTPUT 0
2 - IN A A_CH NF INPUT 0
3 + IN A A_CH INPUT 0
4 VSS GND GND -12.7
5 + IN B B_CH INPUT 0
6 - IN B B_CH NF INPUT 0
7 OUT B B_CH AMPOUTPUT 0
8 VDD VDD DC +12V 12
6. NJM4580 IC608
1 OUT A A_CH AMPOUTPUT 0
2 - IN A A_CH NF INPUT 0
3 + IN A A_CH INPUT 0
4 VSS GND GND -12.7
5 + IN B B_CH INPUT 0
6 - IN B B_CH NF INPUT 0
7 OUT B B_CH AMPOUTPUT 0
8 VDD VDD DC +12V 12
7. NJM4580(IC607)
Pin NO. Symbol Description (V) Remarks
1 OUT A A_CH AMPOUTPUT 0 O
2 - IN A A_CH NF INPUT 0 I
3 + IN A A_CH INPUT 0 I
4 GND GND -7.38 -
5 + IN B B_CH INPUT 0 I
6 - IN B B_CH NF INPUT 0 I
7 OUT B B_CH AMPOUTPUT 0 O
8 VDD DC +12V 11.5 -
8. TDA7448 IC602
1 Vs Supply Voltage 9
2 IN1 FRONT_R signal input PORT. 4.5
3 IN3 REAR_R signal input PORT. 4.5
4 IN5 WOORER signal input PORT. 4.5
5 OUT5 SUB_WOORER signal output PORT 4.5
6 OUT3 CENTR signal output PORT 4.5
7 OUT1 FRONT_R signal output PORT 4.5
8NC - - 0
9 SDA VOL_SDA DATA signal input PORT. 0
10 SCL VOL_SCL CLOCK signal input PORT. 0
11 GND GND GND 0
12 ADDR - - 0
13 NC - - 0
14 OUT2 FRONT_L signal output PORT 4.5
15 OUT4 REAR_L signal output PORT 4.5
16 OUT6 CENTER signal output PORT 4.5
17 IN6 CENTER signal input PORT. 4.5
18 IN4 REAR_L signal input PORT. 4.5
19 IN2 FRONT_L signal input PORT. 4.5
20 CREF Repple Rejection Capacitor CONNECTED PORT. 4.5
- 2-12 -
Pin NO. Symbol Description (V) Remarks
9. NJM2706 IC606
1 LPF Capacitor terminal for LPF 5.3
2 MIN Monaural Amplifier Input 5.3
3 MOUT Monaural Amplifier output 5.3
4 Ca Capacitor terminal for Attack Time Constant 0
5 Cr Capacitor terminal for Release Time Constant 0
6 BASSFIL1 BASS Filter Terminal 1 5.3
7 BASSFIL2 BASS Filter Terminal 2 5.3
8 BASSVRIN BASS Effect Adjust Terminal 5.3
9 BASSVROUT BASS Effect Adjust Terminal 5.3
10 ealaVRIN eala Effect Adjust Terminal 5.3
11 ealaVROUT eala Effect Adjust Terminal 5.3
12 GND GND Terminal 0
13 V+ Power Supply Terminal 10.6
14 VREFOUT Reference Voltage Output 5.3
15 VREFIN Reference Voltage Input 5.3
16 SW1 Mode Swiych 1 0
17 SW2 Mode Swiych 2 0
18 ealaFIL eala Filter Terminal 5.3
19 HFFILL High Frequency Filter for L-ch 5.3
20 HFFILR High Frequency Filter for R-ch 5.3
21 ROUT R-ch Output 5.3
22 LOUT L-ch Output 5.3
23 RIN R-ch Input 5.3
24 LIN L-ch Input 5.3
PART.
1. PB/RP SWITCH IC BA3126N IC202
Pin NO. Symbol Description (V) Remarks
1 REC SW L-CH REC L-CH PLAY signal input PORT. 0 O
2 GND GND GND 0
3 P/B SW L-CH P/B L-CH REC signal input PORT. 0 O
4 CONT PLAY/REC PLAY/REC Switch Control PORT. 0.12 I
5 GND GND GND 0
6 VCC DC +9V DC 12V 10.8
7 P/B SW R-CH P/B R-CH REC signal input PORT. 0 O
8 GND GND GND 0
9 REC SW R-CH REC R-CH PLAY signal input PORT. 0 O
2. PRE AMP IC KIA6225S IC201
Pin NO. Symbol Description (V) Remarks
1 IN 1 L-IN L-CH signal input PORT. 1.3 I
2 FEED 1 L-FEED BACK L-CH FEED BACK signal output PORT. 0.7 O
3 OUT 1 L-OUT L-CH OUTPUT PORT. 3.3 O
4 VCC DC+12V DC 16V 11.5
5 GND GND GND 0
6 OUT 2 R-OUT R-CH OUTPUT PORT. 3.4 O
7 FEED 2 R-FEED BACK R-CH FEED BACK signal output PORT. 0.7 O
8 IN 2 L-IN R-CH OUTPUT PORT. 1.3 I
9 GND GND GND 0
3. RECORDING ALC IC BA3308 IC203
Pin NO. Symbol Description (V) Remarks
1 NG1 L-NF L-CH FEED BACK signal input PORT. 1.7 O
2 IN1 L-IN L-CH signal input PORT 0
3 OUT1 L-OUT L-CH signal output PORT 1.7 O
4 GND GND GND 0 I
5 ALC ALC ALC TIMING driving external constant CONNECTED PORT 0
6 VCC DC+12 DC 16V 11.5
7 OUT2 R-OUT R-CH REC signal output PORT. 1.7 O
8 IN2 R-IN R-CH REC signal input PORT. 0
9 NF2 R-NF R-CH FEED BACK signal input PORT 1.7 O
- 2-13 -
4. MICOM EXPENDER IC BU2090 (IC501)
Pin NO. Symbol Description (V) Remarks
1 VSS VSS GND. 0
2 DATA DATA u-COM IC DATASIGNAL Recive. 0
3 CLK CLK u-COM IC CLKSIGNAL Recive. 0
4 Q0 DOOR_OPEN 0
5 Q1 DOOR_CLOSE 0
6Q2 - - 0
7 Q3 SOL DECK Solenoid CONTROL. 0
8 Q4 MOTOR DECK MOTOR CONTROL. 4.9
9 Q5 REC_MUTE REC Signal Mute Control. 2.8
10 Q6 PB_MUTE Playback Mute Control. 0
11 Q7 REC_BIAS REC BIAS Power Control. 0
12 Q8 REC_BEAT REC BEAT Rejection Control. 0
13 Q9 - - 0
14 Q10 PWR_LED_OFF DECK FRONT LED PWR-OFF 0
15 Q11 PWR_LED_ON DECK FRONT LED PWR-ON 3.7
16 VDD VDD +5V 4.9
AMP PCB
1.MAIN POWER IC STK403-070 IC702
Pin NO. Symbol Description (V) Remarks
1 -Vcc -Vcc -Vcc -38
2 +Vcc +Vcc +Vcc 38
3 OUT OUTPUT L L-CH OUTPUT PORT. 0 O
4 OUT OUTPUT L L-CH OUTPUT PORT. 0 O
5 OUT OUTPUT R R-CH OUTPUT PORT. 0 O
6 OUT OUTPUT R R-CH OUTPUT PORT. 0 O
7 +PRE +PRE PRE AMP Vcc 36 I
8 SUB SUB GND 0
9 GND GND GND 0
10 IN1 INPUT L L-CH INPUT PORT. 0 I
11 IN1F L FEED L-CH FEED BACK signal input PORT. 0 I
12 ST/BY ST/BY MUTE/STBY Control PORT. 0.6 I
13 IN2F R FEED R-CH FEED BACK signal input PORT. 0 I
14 IN2 INPUT R R-CH INPUT PORT. 0 I
2.MAIN POWER IC STK403-240 IC701
Pin NO. Symbol Description (V) Remarks
1 -Vcc -Vcc -Vcc -31
2 +Vcc +Vcc +Vcc 30.4
3 OUT OUTPUT L L-CH OUTPUT PORT. 0 O
4 OUT OUTPUT L L-CH OUTPUT PORT. 0 O
5 OUT OUTPUT R R-CH OUTPUT PORT. 29 O
6 OUT OUTPUT R R-CH OUTPUT PORT. 0 O
7 +PRE +PRE PRE AMP Vcc 0 I
8 SUB SUB GND 0
9 GND GND GND 0
10 IN1 INPUT L L-CH INPUT PORT. 0.7 I
11 IN1F L FEED L-CH FEED BACK signal input PORT. 0 I
12 ST/BY ST/BY MUTE/STBY Control PORT. 0.6 I
13 IN2F R FEED R-CH FEED BACK signal input PORT. 0 I
14 IN2 INPUT R R-CH INPUT PORT. 0 I
15 IN2 INPUT R R-CH INPUT PORT. 0 I
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LG LX-D2640 Below you will find brief product information for LG LX-D2640. This stylish DVD micro home theater system gives you an immersive audio experience with its 110W of power. It features an FM/AM tuner, a DVD player, and a tape deck, allowing you to enjoy a variety of media formats. The system also includes two speakers for stereo sound. With its sleek design and easy-to-use controls, the LG LX-D2640 is a great choice for any home entertainment system.
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