LG LPC-LM530A, LPC-LM535A Service manual
- 1-1 -
[CONTENTS]
❍ SECTION 1. GENERAL
• SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
• IDENTIFICATION OF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
❍ SECTION 2. ELECTRICAL
• ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
• TROUBLESHOOTING GUDIE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
• IC VOLTAGE SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
• SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
• PRINTED CIRCUIT DIARGAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
❍ SECTION 3. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
❍ SECTION 4. REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
- 1-2 -
SECTION 1. GENERAL
❏ SPECIFICATIONS
MODEL LPC-LM530A/X
SECTION LPC-LM535A/X
Power supply Refer to the back panel of the unit.
Power consumption 20W
Mass 2.75kg
External dimensions (W x H x D) 550 x 290 x 220mm
Output Power 7.5W x 2
Speakers 8Ω x 2
Battery Operation DC 12V, eight “D”(R20) batteries (not supplied)
Fequency response 100 ~18000Hz
Signal-to-noise ratio 59dB
T.H.D 0.7%
Tuning Range 65~74MHz, 87.5~108MHz or 87.5 ~108MHz
Intermediate Frequency 10.7MHz
Antenna Telescopic antenna
Tuning Range 522~1611kHz or 530 ~1610kHz
Intermediate Frequency 450kHz
Antenna Ferrite bar antenna
Recording System 4 Tracks 2 channel stereo
Frequency Response 125 ~8000Hz
Signal to Noise Ratio 40/45dB (REC/PLAY)
[General][CD][TAPE]
[TUNER]
[AM] (MW)
[FM]
* Designs and specifications are subject to change without notice.
Remote Control Operation Range
Point the remote control at the remote sensor and press the buttons.
Distance: About 23 ft (7 m)from the front of the remote sensor.
Angle: About 30 °in each direction of the front of the remote sensor.
- 1-3 -
❏ IDENTIFICATION OF CONTROLS
FRONT/REAR PANEL
- 1-4 -
Remote Control
POWER XDSS
TUNER/BAND EQ PATT.
VOLUME
PRESET
REPEAT
SLEEP
PROGRAM
SURR. MUTE
12
5436
9870
OPTIONAL
1
2
3
4
5
6
14
13
12
11
10
9
8
7
1. XDSS button
2. POWER button
3. TUNER/BAND button
4. This button is not available.
5. PRESET ( ) button
6. CD FUNCTION buttons
• PLAY/PAUSE ( ) button
• CD STOP ( ) button
• CD SKIP/SEARCH ( ) button
• REPEAT button
7. NUMBER buttons
8. TAPE FUNCTION buttons
• RECORD/RECORD PAUSE button ( )
• BACKWARD PLAY button ( ) : OPTIONAL
• FORWARD PLAY ( ) button
• TAPE STOP button ( )
• FAST FORWARD ( ) button
• REWIND ( ) button
9. SLEEP button
10. PROGRAM button
11. VOLUME ( ) button
12. EQUALIZER PATTERN (EQ PATT.) button
13. MUTE button
14. SURROUND (SURR.) button
1. RECORD/RECORD PAUSE indicator
2. MP3 indicator
3. SLEEP indicator
4. TIMER indicator
5. PROGRAM indicator
6. MEMORY indicator
7. STEREO indicator
8. BACKWARD PLAY indicator
9. TAPE MODE indicator
10. FORWARD indicator
11. CD SYNCHRO RECORDING indicator
12. CD PLAY/PAUSE indicator
13. XDSS indicator
14. Equalizer indicator
15. Surround indicator
16. CD REPEAT indicator
17. • VOLUME indicator
• SOUND LEVEL METER
Display Window
REC
REPEAT
FLAT
XDSS SURR
CLASSIC POP
ROCK
1 ALL
SYNC SLEEP PROG STEREO
MP3 TIMER
MEMORY
1 2 3 4 5 6 7 8 9 10
11
12
13
14
1516 17
- 2-1 -
SECTION 2. ELECTRICAL
❏ ADJUSTMENTS
1. TAPE DECK ADJUSTMENT
DECK MODE TEST TAPE TEST POINT ADJUSTMENT ADJUST FOR DECK ADJUST
BLAY BACK MTT-114
SPEAKER OUTPUT
Azimuth adjusting screw L/R Maximum
STOP FWD: LEFT
RVS
FWD:RIGHT
RVS: LEFT
2. RECORD BIAS ADJUSTMENT
DECK MODE TEST TAPE TEST POINT ADJUSTMENT ADJUST FOR
REC MODE MTT-5511 C241 L201 AUTO-RVS 85kHz±5kHz
AUTO-STOP 60kHz±5kHz
- 2-2 -
❏ TROUBLESHOOTING GUIDE
1. CD
- 2-3 -
• OPEN COLOSE NG
CONNECTOR LOCKING CHECK (PN508,PN507)
DEFECTIVE MAIN
POWER SUPPLY
DEFECTIVE MICOM
DEFECTIVE IC503
DEFECTIVE MICOM
MECHANISM
CHECK POWER SUPPLY CIRCUIT (PN508,PN507)
PN508 PIN 8 = 6.2V,PIN 7 = 5V,PN507 PIN 1 = 5V
CHECK VOLTAGE CHANGE LO+, LO- OF IC503
(PN507, PIN OPEN:1 2, CLOSE:1 3)
CHECK VOLTAGE CHANGE OF OPEN CLOSE,
AND BTLMUTE VOLTAGE(=5V)
(PN507 PIN 1 2:OPEN, 1 3:CLOSE, 1 4:BTLMUTE)
YES
YES
YES
NO
NO
NO
NO
- 2-4 -
• “READING” DISPLAY CHECK (=ONLY “CD” DISPLAY)
- 2-5 -
• READING OK CHECK (= “ NO DISC ” DISPLAY)
CONNECTOR LOCKING
CHECK(PN50 1 ,PN503)
DOES SLED MOVE?
DOSE LENSE MOVE?
(UP&DOWN)
DOSE LASER LIGHT?
DOES SPINDLE ROTATE?
IS READING OK?
CHECK PN50 1 PIN 1 4,1 5
(TA+,TA-)
CHECK PN503 PIN5.6
(SP+,SP-)
CHECK PN50 1 PIN 1 0(LD)
CHECK PN50 1 PIN 1 5.1 6
(FA-,FA+)
CHECK PN503 PIN3.4
(SL+,SL-)
DEFECTIVE PICK UP OR
IC503 OR IC501 OR IC502
DEFECTIVE PICK UP OR
IC503 OR IC501
DEFECTIVE PICK UP OR
IC502
DEFECTIVE PICK UP OR
IC503
DEFECTIVE PICK UP OR
IC503 OR IC501 OR IC502
A
B
C
D
E
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
- 2-6 -
• READING OK CHECK #A(=“NO DISC” DISPLAY)
DOSE SL+ WAVEFORM
APPEAR AT(IC503 PIN 1 4 AND
PN503 PIN3)WAVEFORM #2
SLED MOTOR WAVE
DOSE SLIN WAVEFORM
APPEAR AT (IC503 PIN5)
WAVEFORM #2 SLED
DRIVE WAVE
CHECK PN503 CONNECTOR LINE
DEFECTIVE IC50
DEFECTIVE IC503
DEFECTIVE PN503
CONNECTOR
DEFECTIVE PICK UP
SLED MOTOR
A
YES
NO
NO
NO
NO
NO
- 2-7 -
• READING OK CHECK #B(=“NO DISC” DISPLAY)
DOSE FA+ WAVEFORM
APPEAR AT(IC503 PIN 1 5 AND
PN50 1 PIN 1 6)WAVEFORM #3
FOCUS COIL DRIVE WAVE
DOSE FAIN WAVEFORM
APPEAR AT (IC503 PIN26)
WAVEFORM #3 FOCUS
DRIVE WAVE
CHECK PN50 1 CONNECTOR LINE
DEFECTIVE IC50 1
DEFECTIVE IC503
DEFECTIVE PN501
CONNECTOR
DEFECTIVE PICK UP
FOCUS ACTUATOR
B
YES
NO
NO
NO
NO
NO
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