AIWA LH D6230 Service Manual

Page 1
- 1-1 -
SECTION 1. GENERAL
• SERVICING PRECAUTIONS
.......................................................................................................
1-2
• ESD PRECAUTIONS
...................................................................................................................
1-4
........................................................................................................................
1-5
• LOCATION OF CUSTOMER CONTROLS
...................................................................................
1-6
SECTION 2. AUDIO PART
• BLOCK DIAGRAM
........................................................................................................................
2-1
• SCHEMATIC DIAGRAMS
............................................................................................................
2-3
• WIRING DIAGRAM
......................................................................................................................
2-9
• VOLTAGE SHEET (IC&TR) ........................................................................................................ 2-11
• PRINTED CIRCUIT DIARGAMS
................................................................................................
2-15
SECTION 3. DVD PART
• ELECTRICAL TROUBLESHOOTING GUIDE
.............................................................................
3-1
• DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ...................................... 3-9
• BLOCK DIAGRAMS
....................................................................................................................
3-22
• DVD PART SCHEMATIC DIAGRAMS
........................................................................................
3-23
• VOLTAGE SHEET (IC & TR)
......................................................................................................
3-31
• PRINTED CIRCUIT DIAGRAM
...................................................................................................
3-33
SECTION 4. EXPLODED VIEWS
......................................................................................
4-1
SECTION 5. SPEAKER PART
..........................................................................................
5-1
SECTION 6. REPLACEMENT PARTS LIST
.....................................................................
6-1
CONTENTS
Page 2
SECTION 1. GENERAL PART
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.
- 1-2 -
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
aPressure
Pressure
Cotton swab
Conductive Sheet
Page 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 (1MΩ)
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.
- 1-3 -
Armband
Conductive Sheet
Resistor (1 Mohm)
Resistor (1 Mohm)
Page 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
surface 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
- 1-4 -
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 5
- 1-6 -
LOCATION OF CUSTOMER CONTROLS
FRONT PANEL
DISPLAY WINDOW
Page 6
- 1-7 -
REAR PANEL
Page 7
- 3-1 -
SECTION 3. ELECTRICAL
TROUBLESHOOTING GUIDE
1. System check flow
Page 8
- 3-2 -
2. Power check flow
Page 9
- 3-3 -
3. Test & debug flow
Page 10
- 3-4 -
Page 11
- 3-5 -
Page 12
- 3-6 -
Page 13
- 3-7 -
Page 14
- 3-8 -
Page 15
- 3-9 -
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL
1) MT1379 main clock is at 27MHz(X501)
2) MT1336 reset is high active
Page 16
- 3-10 -
3) RS232 waveform during procedure(Downloading)
4) Flash R/W enable signal during download(Downloading)
Page 17
- 3-11 -
2. SDRAM CLOCK
1) MT1379 main clock is at 27MHz(X501)
3. TRAY OPEN/CLOSE SIGNAL
1) Tray open/close waveform
Page 18
- 3-12 -
2) Tray close waveform
3) Tray open waveform
Page 19
- 3-13 -
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)
5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)
Page 20
- 3-14 -
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION)
7. DISC TYPE JUDGEMENT WAVEFORM
Page 21
- 3-15 -
Page 22
- 3-16 -
8. FOCUS ON WAVEFORM
Page 23
- 3-17 -
9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)
Page 24
- 3-18 -
10. TRACKING CONTROL RELATED SIGNAL(System checking)
Page 25
- 3-19 -
11. RF WAVEFORM
12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)
Page 26
- 3-20 -
13. MT1379 VIDEO OUTPUT WAVEFORM
1) Full colorbar signal(CVBS)
2) Y
Page 27
- 3-21 -
3) C
14. AUDIO OUTPUT FORM AUDIO DAC
1) Audio related Signal
Page 28
- 5-1 -
SECTION 5. SPEAKER PART
MODEL: LHS-D6230T
853
852
851
850
861
854
862
A800
Page 29
- 5-2 -
SECTION 5. SPEAKER PART
MODEL: LHS-D6230W
852
854
855
853
851
861
Page 30
SECTION 2. AUDIO PART
BLOCK DIAGRAM
2-1 2-2
Page 31
SHEMATIC DIAGRAMS
• MAIN SCHEMATIC DIAGRAM
2-3 2-4
Page 32
• FRONT SCHEMATIC DIAGRAM
2-5 2-6
Page 33
• POWER SCHEMATIC DIAGRAM
NOTE: Warning
Parts that are shaded are critical With respect to risk of fire or electrical shock.
NOTE:
1. Shaded() parts are critical for safety.Replace only with specified part number.
2. Voltages are DC-measured with a digital voltmefer during Play mode.
2-7 2-8
Page 34
WIRING DIAGRAM
NOTE: Warning
Parts that are shaded are critical With respect to risk of fire or electrical shock.
2-9 2-10
Page 35
VOLTAGE SHEET (IC&TR)
LOC. PART PIN NUM. STOP DVD PLAY
IC650 LC8767XX 1 0 0
2 0 0 3 0 0 4 4.54 4.54 5 0 0 6 0 0 7 5 5 8 0 0
9 4.7 4.7 10 X X 11 4.84 4.84 12 X X 13 X X 14 0 0 15 2.34 2.34 16 2.45 2.45 17 4.86 4.86 18 4.84 4.84 19 0.57 0.57 20 X X 21 1.65 1.65 22 4.88 4.88 23 4.88 4.88 24 0 0 25 2.2 2.2 26 4.37 4.37 27 0 0 28 2.77 2.77 29 4.83 4.83 30 -25.2 -25.2 31 -25.2 -25.2 32 -25.2 -25.2 33 -25.2 -25.2 34 -25.2 -25.2 35 -25.2 -25.2 36 -25.2 -25.2 37 -25.2 -25.2 38 -25.2 -25.2 39 0 0 40 -25.2 -25.2 41 -9.52 -9.52 42 -15.3 -15.3 43 -9.4 -9.4 44 -18.1 -18.1 45 -24.2 -24.2 46 4.9 4.9 47 -18.1 -18.1 48 -15.3 -15.3 49 -24.1 -27 50 -24.1 -24.1 51 -27.5 -27.5 52 -26.6 -27
LOC. PART PIN NUM. STOP DVD PLAY
53 -15.1 -15.2 54 -26.7 -27 55 -26.7 -27 56 -26.7 -27 57 -17.7 -18 58 -26.7 -27 59 -26.7 -27 60 -26.7 -27 61 X X 62 X X 63 X X 64 X X 65 X X 66 X X 67 X X 68 X X 69 X X 70 X X 71 0 0 72 4.9 4.9 73 0 0 74 0 0 75 0 0 76 0 0 77 0 0 78 0 0 79 0 0 80 0 0 81 0 0 82 X X 83 X X 84 X X 85 3.8 3.8 86 0 0 87 X X 88 X X 89 0 0 90 4.86 4.85 91 X X 92 0 0 93 0 0 94 0 0 95 4.86 4.86 96 0.75 0.75 97 0.75 0.75 98 4.5 4.5 99 4.9 4.9
100 2.5 2.5
LOC. PART PIN NUM. STOP DVD PLAY
IC500 KIA7808 1 11.9 11.9
2 0 0 3 8 8
IC501 KIA7812 1 18.4 18.4
2 0 0 3 11.9 11.9
IC502 KIA7909 1 0 0
2 -18.6 -18.6 3 -9 -9
IC503 KA7809 1 18.4 18.4
2 0 0 3 9 9
IC504 KA78R33 1 8.4 8.4
2 3.3 3.3 3 0 0 4 8.4 8.4
IC505 KIA7805 1 10.3 10.3
2 0 0 3 5 5
IC507 KIA7805 1 5.6 5.6
2 0.6 0.6 3 10.6 10.6
D507 D5402 ANODE -0.2 -0.2
CATHODE 10.5 10.5
D511 D5402 ANODE -0.2 -0.2
CATHODE 10.5 10.5
BD501 KBU6G 1 -18.6 -18.6
2 0 0 3 0 0 4 18.4 18.4
IC101 KIA4558 1 4.5 4.5
2 4.5 4.5 3 4.5 4.5 4 0 0 5 4.5 4.5 6 4.5 4.5 7 4.5 4.5 8 9 9
IC102 CS5331A 1 1.4 1.4
2 1.6 1.6 3 1.6 1.6 4 1.5 1.5 5 2.2 2.2 6 0 0 7 5 5 8 2.2 2.2
IC103 4052 1 0 0
2 0 0 3 0 0 4 0 0 5 0 0 6 0 0
2-11 2-12
Page 36
LOC. PART PIN NUM. STOP DVD PLAY
7 -4.5 -4.5 8 0 0
9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 4.5 4.5
IC450 KIA4558 1 0 0
2 0 0
3 0 0
4 -9 -9
5 0 0
6 0 0
7 0 0
8 9 9
IC601 M60446AFP 5 5.2 5.2
30 -5.3 -5.3 42 5 5
IC200 TDA7265 1 -18.7 -18.7
2 0 0
3 18.6 18.6
4 0 0
5 9.3 9.3
6 -18.6 -18.6
7 0 0
8 0 0
9 0 0 10 0 0 11 0 0
IC250 TDA7265 1 -18.7 -18.7
2 0 0
3 18.6 18.6
4 0 0
5 9.3 9.3
6 -18.6 -18.6
7 0 0
8 0 0
9 0 0 10 0 0 11 0 0
IC300 TDA7265 1 -18.7 -18.7
2 0 0
3 18.6 18.6
4 0 0
5 9.3 9.3
6 -18.6 -18.6
7 0 0
8 0 0
9 0 0 10 0 0 11 0 0
LOC. PART PIN NUM. STOP DVD PLAY
IC400 TDA7265 1 -18.7 -18.7
2 0 0 3 18.6 18.6 4 0 0 5 9.3 9.3 6 -18.6 -18.6 7 0 0 8 0 0
9 0 0 10 0 0 11 0 0
2-13 2-14
Page 37
PRINTED CIRCUIT DIAGRAMS
• MAIN/POWER/JACK P.C BOARD (SOLDER SIDE)
2-15 2-16
Page 38
• MAIN/POWER/JACK P.C BOARD (COMPONENT SIDE)
2-17 2-18
Page 39
• FRONT P.C. BOARD (SOLDER SIDE)
• FRONT P.C. BOARD (COMPONENT SIDE)
2-19 2-20
Page 40
DVD PART SCHEMATIC DIAGRAMS
• MPEG SCHEMATIC DIAGRAM
3-23 3-24
Page 41
• SERVO SCHEMATIC DIAGRAM
3-263-25
Page 42
• AUDIO SCHEMATIC DIAGRAM
3-27 3-28
Page 43
• INTERFACE SCHEMATIC DIAGRAM
3-29 3-30
Page 44
VOLTAGE SHEET (IC&TR)
3-31 3-32
Page 45
PRINTED CIRCUIT DIAGRAM
• DVD P.C. BOARD(SOLDER SIDE)
3-33 3-34
Page 46
• DVD P.C. BOARD (COMPONENT SIDE)
3-35 3-36
Page 47
267
FAN
A46
351
454
301
A48
A47
305
302
303
A41
262
A26
A43
264
263
250
261
265
252
454
454
459
458
SECTION 4. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION
NOTE) Refer to “SECTION 6 REPLACEMENT
PARTS LIST” in order to look for the part number of each part.
4-1 4-2
Page 48
• Deck Mechanism Exploded View
4-3 4-4
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