MANUAL SERVICE
U1060-U1060/LMS-LM : MODEL
P/NO : AFN30721349 |
JUNE,2006 |
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3CD CHANGER MINI Hi-Fi SYSTEM
SERVICE MANUAL
MODEL : LM-U1060/LMS-U1060
[CONTENTS]
SECTION 1. GENERAL
• SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
• SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
SECTION 2. ELECTRICAL
• ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART) . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
• ELECTRICAL TROUBLESHOOTIHG GUIDE & WAVEFORM(CD PART) . . . . . . . . . . . . . . 2-22
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
• PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
SECTION 3. EXPLODED VIEWS
• CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
.3-1 |
• TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-3 |
• TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-5 |
• CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-7 |
• SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-9 |
SECTION 4. REPLACEMENT PARTS LIST
• REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
4-1 |
- 1-1 -
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.
Storage in conductive bag |
Drop 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.
NEVER look directly at the laser beam, and don’t let contact fingers or other exposed skin.
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.
Magnet |
Pressure |
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Pressure |
How to hold the pick-up
Cotton swab
Conductive Sheet
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 -
■ 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.
Armband
Resistor
(1 Mohm)
Resistor
(1 Mohm)
Conductive
Sheet
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.
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VOLUME |
UP |
RESET jump wire |
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VOLUME KNOB
DOWN
- 1-3 -
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
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.
- 1-4 -
SPECIFICATIONS
[GENERAL]
Power supply Power consumption Net Weight
External dimensions (W x H x D)
[CD]
Frequency response Signal-to-noise ratio Dynamic range
[TUNER] FM
Tuning Range Intermediate Frequency Signal to Noise Ratio Frequency Response
AM [MW]
Refer to the back panel of the unit. Refer to the back panel of the unit. 6.2 kg
273 x 321x 359 mm
40 - 20000 Hz
75 dB
75 dB
87.5 - 108.0 MHz
10.7 MHz 60/55 dB
50 - 10000 Hz
Tuning Range |
522 - 1620 kHz or 520 - 1720 kHz |
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Intermediate Frequency |
450 kHz |
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Signal to Noise Ratio |
30 dB |
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Frequency Response |
140 - 1800 Hz |
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[AMP]MPLIFIER(LH-W96’s) |
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Output Power |
100W +100W+150W [LM-U1560+LMS-U1560W(SUB WOOFER)] |
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100W+100W [LM-U1060] |
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50W +50W [LM-U560] |
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30W + 30W [LM-U360] |
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T.H.D |
0.5% |
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Frequency Response |
40 - 20000 Hz |
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Signal-to-noise ratio |
75 dB |
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[TAPE] |
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Tape Speed |
4.75cm/sec |
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Wow Flutter |
0.25% (MTT -111, JIS-WTD) |
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F.F/REW Time |
120sec (C-60) |
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Frequency Response |
250 - 8000Hz |
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Signal to Noise Ratio |
43dB |
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Channel Separation |
50dB(P/B)/45dB(R/P) |
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Erase Ratio |
55dB (MTT-5513) |
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[SPEAKERS] |
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MODEL |
LMS-U1560 |
LMS-U1560W |
LMS-U560 |
LMS-U360 |
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LMS-U1060 |
(SUB WOOFER) |
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Type |
2way 2speaker |
1way 1speaker |
2way 2speaker |
2way 2speaker |
Impedance |
4Ω |
3Ω |
4Ω |
4Ω |
Frequency Response |
50-20000Hz |
50-15000Hz |
55-20000Hz |
55-20000Hz |
Sound Pressure Level |
85dB/W (1m) |
84dB/W (1m) |
86dB/W (1m) |
86dB/W (1m) |
Rated Input Power |
100W |
180W |
50W |
30W |
Max. Input Power |
200W |
360W |
100W |
60W |
Net Dimensions (W x H x D) |
229X224X286mm |
273x325x384mm |
229X224X286mm |
229X224X286mm |
Net Weight |
3.8kg |
6kg |
3.9kg |
3.8kg |
- 1-5 -
- 1-6 -
SECTION 2. ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART)
■ MICOM PART CHECK I
P7904 6PIN P-SENS check |
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NO |
Refer to SMPS |
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Troubleshooting |
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YES |
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IC101 KIA7042? |
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NO |
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Check if IC101 KIA7042 |
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YES |
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input is over 5V |
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NO |
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NO |
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YES |
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IC101 KIA7042 |
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relevant parts check |
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IC100 78KO/KF2 1 PIN |
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Check if IC101 KIA7042 |
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Power Check |
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input is over 4.3V |
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relevant parts |
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YES |
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YES |
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replacement |
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normal |
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normal |
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- 2-1 -
■ MICOM PART CHECK II
P7904 5PIN 5.6V check
NO
YES
D101 1SR35 both terminal power check
NO
YES
Q101 EMITTER 5V check and COLLECTO
YES
IC 103 8PIN IC 100 19,20,59 PIN 5V check
YES
X101:32.768KHz X100:9.8304MHz operation status check
YES
normal
Refer to SMPS
Troubleshooting
Output 5V operation check
D101 1SR35
YES
relevant parts check
YES
normal
Q102 BASE PIN
0.6V HIGH check
NO
YES
Q102 COLLECTOR
0.6V LOW check
YES
relevant parts check
YES
normal
NO |
relevant parts |
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Check if IC101 KIA7042 output power is over 4.3V
YES
NO
relevant parts check
YES
normal
relevant parts replacement
relevant parts replacement
- 2-2 -
■ IC103 KS4CD21CS CHECK
IC100 78KOKF2 22,24
PIN Check
YES
22 PIN DATA |
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MICOM power 5V check |
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NO |
Refer to MICOM |
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Troubleshooting |
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YES |
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YES |
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relevant parts check |
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NO |
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YES |
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relevant parts |
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replacement |
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normal |
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normal |
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■ FLD DISPLAY CHECK
P7904 1,2,3 power check
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NO |
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YES |
Refer to SMPS |
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Troubleshooting |
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F1+, F2 both terminal: 5V and above VKK: power is over 26V
YES
P7302 connection status |
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NO |
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check and power check |
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F+,F2both termainal: 5V or |
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above VKK:26V or above |
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power check |
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YES |
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IC301 PT6324 Power check |
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50 PIN VKK:-26V 9, 51 |
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PIN +5V |
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YES |
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P7302 assembly check
YES
Each PIN power check |
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NO |
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YES |
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relevant parts |
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replacement |
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normal |
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- 2-3 -
NO
YES
IC100 IC301 DATA Communication check PIN PIN (ST8)75 PIN 3PIN(STB) (DO) 76 PIN 2PIN(DO) (DI) 77 PIN 4PIN(DI)
(CLK)78 PIN 1PIN(CLK)
NO
YES
FLT light on
YES
normal
If 5V defective D321 SR35 input and output power check
YES
relevant parts check
NO
YES
normal
IC100
(STB)75 PIN (STB) (DO) 77 PIN 4PIN(DO) (CLK) 78 PIN 1PIN(CLK) Data output check
YES
76 PIN DATA input check
YES
relevant parts check
NO
YES
normal
relevant parts replacement
relevant parts replacement
- 2-4 -
■ PWM ALTERATION PART CHECK
P7905 9PIN 3.3V check
YES
IC604 PS9829 VDD PIN Power check (3.10.22.29.39.47.56.65.72. 87. 94)
YES
X601 12.288MHz operation check
YES
IC604 PS9829
86 PIN CLK input check
YES
IC100 78KOKF2 21 PWM_CLK 22 PWM_DATA 23 PWM_REST output check
YES
IC604 PS9829 DATA input check
78 PIN DATA
79 PIN CLK
96 PIN REST
YES
NO
NO
NO
NO
NO
Refer to SMPS
Troubleshooting
relevant parts check X604 12.288MHz
NO
YES
normal
R668(470Ω) output check
NO
YES
normal
LINE resistance check
DATA:R671 CLK:R670
RST:R665
NO
YES
normal
CD ASS`Y PS9829 communication status check(P7403)
YES NO
PWM MODULATOR output |
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IC604 PS9829 DATA input check |
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check |
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YES |
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NO |
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FL:75(+)74(-)FR:71(+)70(-) |
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SW:68(+)67(-) |
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normal |
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NO |
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YES |
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IC604 PS9829 parts check |
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normal |
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relevant parts replacement
relevant parts replacement
relevant parts replacement
Refer to CD Troubleshooting
Check each line resistance check
- 2-5 -
■ POWER AMP PART CHECK
P7905 3 PIN+12 13.14.15
PIN [ LM-U1560 : 32V/LM-U1060 : 32V/LM-U560 : 22V/LM-U360 : 16V ]
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NO |
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YES |
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Refer to SMPS |
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Troubleshooting |
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Each IC700,701 34, 29, 26, 21 PIN input power check
YES
Each IC700, 701 1, 36.17, 18, 19 PIN +12V input power check
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Each LINE resistance output |
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NO |
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power check |
YES |
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IC700:R702, 701, 726, 727, |
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724 |
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IC701:R730, 729, 750 ,753, |
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752(Only LM-U1560) |
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PWM MODULATOR input |
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power check Each IC |
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4.6.14.16 PIN |
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YES |
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POWER IC 700.701.702.703 |
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34.29.27.20 PIN output |
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check |
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YES
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NO |
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Output LINE COIL check |
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relevant parts |
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replacement |
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YES
normal
- 2-6 -
■ AUX FUNCTION
Check whether JK800 contacts or not
YES
IC200
(BU4052)4,11PI
N input waveform check
NO
YES
IC200 (BU4052)3,13PIN output waveform check
YES
IC801 (MC4580) 3, 5 PIN input waveform check
NO
YES
IC801(MC4580) Pins 1, 7 output check
YES
IC603(CS5340) Pins10, 12 input check
YES NO
normal
IC200 (BU4052)16PINVDD, 8PIN VSS power check
YES |
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NO |
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relevant parts replacement
IC801 (MC4580)4PIN VSS,8PIN VDD power check
YES |
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NO |
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relevant parts replacement
IC603 Pin4 SDout check
YES NO
Relevant Part repplacement
µ-COM (IC100) 3, 6PIN Communication check
Refer to SMPS
Troubleshooting
IC603 Pins2, 7, 8 check
- 2-7 -
■ TUNER FUNCTION CHECK
Tuner module (TUN800) operation check
YES |
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NO |
TUNER MODUEL power |
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check (2PIN 9Vcheck) |
IC200(BU4052)1,
12PIN input waveform check
YES
IC200 (BU4052)3,13PIN output waveform check IC601(BU4052)2,15PIN input waveform check
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NO |
IC200 (BU4052)16PIN- |
YES |
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YES |
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VDD,8PIN VSS power check |
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relevant parts replacement |
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IC801 (MC4580)2,6PIN input waveform check.
YES |
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NO |
IC801(MC4580)4PIN |
YES |
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VSS,8PIN VDD power check |
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relevant parts replacement |
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IC801(MC4580) Pins 1, 7 input check
YES
IC603(CS95340) Pins10, 12 input check
■ TAPE FUNCTION CHECK
TAPE PCB ASS`Y
YES
IC200(BU4052)2,1
5PIN input waveform check
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NO |
IC200 (BU4052)16PIN- |
YES |
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YES |
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VDD,8PIN VSS power check |
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relevant parts replacement |
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IC200 (BU4052)3,13PIN output check IC601(BU4052) 2,15PIN input waveform check
YES
IC801 (MC4580)2,6PIN input check
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NO |
IC200 (BU4052)16PIN- |
YES |
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YES |
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VDD,8PIN VSS power check |
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relevant parts replacement |
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IC801(MC4580) Pins 1, 7 input check
YES
IC603(CS95340) Pins10, 12 input check
- 2-8 -
■ TAPE PLAY PART CHECK
P2707:4 PIN 12V
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NO |
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YES |
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Refer to SMPS |
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Troubleshooting |
IC201 (HA12237)16 PIN 12V |
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input waveform check |
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YES
IC201:5.26 PIN
Signal Output check
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NO |
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DECK HEAD input check |
NO |
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HEAD WIRE or |
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YES |
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YES |
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Mecha replacement |
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DECK HEAD input IC201 |
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32.39PIN check
YES
IC20114 PIN MUTE |
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relevant parts check |
NO |
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operation check |
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YES |
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relevant parts |
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replacement |
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normal |
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NO |
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YES |
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IC202 10 PIN HIGH operation |
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check |
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YES |
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relevant parts check |
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NO |
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YES |
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relevant parts |
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replacement |
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normal |
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normal |
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- 2-9 -
■ TAPE REC PART CHECK
IC604 PS9829 #49,#52 PWM NO output check
YES
NO
P7207 #2.#4 output check
YES
NO
P2707 #5.#7 input check
YES
IC203 MC4580 #1,#7 check
NO
YES
IC201 7.24 PIN REC input check
YES
IC201 10.21 PIN output check
YES
L203 2.3 PIN oscillation check
YES
P2203 5.3 PIN input check
8 PIN ERASE input check
NO
YES
Refer to PWM modulation part
Q601 Collector waveform check
Board to Board cantact check
IC203 8 PIN +12V check
NO
YES
relevant parts check
NO
YES
normal
Q205(D1304)
BASE HIGH check
NO
YES
normal
normal
Refer to SMPS
Troubleshooting
relevant parts replacement
IC202 4 PIN HIGH operation check
YES
relevant parts replacement
- 2-10 -
■ SMPS POWER CIRCUIT
*MAIN PART
Check the fuse F901
YES
Check the DC V of C905. If DC V is over 400V
YES
Chcek the DC V Of C909, C903,C921 If DC V is in 14~19V and it is steady.
YES
Check the DC V Of C981,C945. If DC V is 6.1V
YES
Chcek the DC VOf C950,C951 If DC V is in 35V,-35V
YES
OK
NO
Replace the fuse
NO |
Check BD901, LF901,902 |
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NO |
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Check IC901 ,902 |
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NO |
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Replace IC 901,902 |
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YES
Check short of P9701,P9702 line
NO
Check short of P9702 line
NO
Check short of P9701 line
- 2-11 -
*P-SENS PART (OPTIONAL PART)
Check the PIN6 OF P9702 |
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NO |
Check power circuit Trouble |
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If DC V is over 5.6V |
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shooting |
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YES
OK
*VKK PART
Check the PIN3 OF P9702 |
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NO |
Check power circuit |
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If DC V is over -28V ±2 |
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Trouble shooting |
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YES
OK
- 2-12 -
INTERNAL BLOCK DIAGRAM of ICs
• UTC MC4580
PIN CONFIGURATION
TEST CIRCUIT
- 2-13 -