Daewoo NC-8913 Manuel utilisateur
Service Manual
MiniComponentSoundSystem
9CD8308100
July. 2009
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SAFETY PRECAUTIONS ......................................................................................... 1
TROUBLE SHOOTING GUIDE ................................................................................ 3
EXPLODED VIEW AND MECHANICAL PARTS LIST ............................................. 4
WIRING DIAGRAM ................................................................................................... 5
BLOCK DIAGRAM .................................................................................................... 6
SCHEMATIC DIAGRAM ........................................................................................... 7
FRONT Section
MP3/CD Section
MAIN Section
POWER Section
P.C.B PATTERN LAYOUT .........................................................................................8
FRONT Section
MP3/CD Section
MAIN Section
POWER Section
APPENDIX-ELECTRICAL PART LIST ................................................................... 9
TableofContents
Mini component sound system
NC-8911/NC-8913/NC-8915DU
NC-8911/NC-8913/NC-8915DE
ADJUSTMENTS ........................................................................................................ 2
SafetyPrecautions
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SafetyPrecautions
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Adjustments
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●TUNER Section
FM TEST EQUIPMENT
1.Adjust L003 to obtain 87MHz±0.5
2.Adjust PVC1(FM OSC)to obtain 108.5MHz±0.5
3.Adjust L002 to obtain maximal waveform for 90MHz
4.Adjust PVC2(FM ANT)to obtain maximal waveform for 106MHz
Item Input Circuit Setup Output Circuit Setup S.S.G setting Adjust point Adjustment
FM Frequency Connect output signal Connect V-Input signal 87MHz L003 Adjust for
Range Adjustment generator to FM ANT generator to CE002(-)/ Dev.26dB 87MHz±0.5
terminal of D001(-) CE003(-) pin 108.5MHz PVC1(FM OSC) Adjust for
5.0±zHM5.801Bd62.veDnip
FM RF Connect output signal Connect V-Input signal 90MHz L002 Adjust maximal
generator to FM ANT generator to CE002(-)/ Dev.26dB waveform for 90MHz
terminal of D001(-) CE003(-) pin 106MHz PVC2(FM ANT) Adjust maximal
zHM601rofmrofevawBd62.veDnip
Adjustments
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●TUNER Section
AM TEST EQUIPMENT
1.Adjust L009 to obtain 510KHz±10(America)/513KHz±9(Europe)
2.Adjust PVC3(AM OSC)to obtain 1730KHz±20(America)/1638KHz±18(Europe).
3.Adjust L011 to obtain maximal waveform for 600KHz
4.Adjust PVC4(AM ANT)to obtain maximal waveform for 1400KHz
Item Input Circuit Setup Output Circuit Setup S.S.G setting Adjust point Adjustment
AM Frequency Connect output signal Connect V-Input signal 510KHz(America) L009 Adjust for
Range Adjustment generator to test loop generator to CE002(-)/ 513KHz(Europe) 510KHz±10(America)
)eporuE(9±zHK315Bd06.veDnip)-(300EC
1730KHz(America) PVC3(AM OSC) Adjust for
1638KHz(Europe) 1730KHz±20(America)
)eporuE(81±zHK8361Bd06.veD
AM RF Connect output signal Connect V-Input signal 600KHz L011 Adjust maximal
zHK006rofmrofevawBd06.veD/)-(200ECotrotarenegpooltsetotrotareneg
CE003(-) pin 1400KHz PVC4(AM ANT) Adjust maximal
zHK0041rofmrofevawBd06.veD
AM Antenna
AM
Antenna
Terminal
SET
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TroubleShootingGuide
MP3/CD Section
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CD open and disc insert Refer to 2
Spindle motor rotation
Pick-up unit return(outside >>
inside)
Laser diode on
Focusing operation
Read in CD/MP3 disc operation
Reading and auto play
CD play on
Refer to 3
Refer to 4
Refer to 5
Refer to 6
Auto to play
CD close and CD on
Refer to 1
AC cord in
Power ON/OFF ON
Reading in USB file and USB
Encoding operation Refer to 7
TroubleShootingGuide
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MP3/CD Section
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1. Pick-up unit return
2. CD o
p
en and disc insert
3. Laser diode on
STOP PLAY
C 0V 1.8V
B 3.3V 2.1V
(HQ500) E 3.3V 2.8V
CD open and disc
insert
AC cord in
Function to CD
and Initializing no
1. Check CN704
2. Check IC701 of 38pin and 39pin and 40pin
41pin and 44pin.
3. Check CN502,CW504.CN505
4. Check IC504 of 3pin:5.0V
5. Check Q501 collector:+3.3V
6. Check +3.3V (IC500 pin8/18/23/25/38/57/85/113/116/122)
7. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,
SP- 3.41V
8. Check SPDO +1.90V (IC500 M5673 or M5675 pin123)
9. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,
SL+ 3.91V
10. Check CD Board(Around IC solder short,cold soldering )
CD open and disc insert
Yes
Yes
CD close and cd on
Laser diode on
Yes
Focusing operation
no 1. Check +1.8V LD on(HQ500 collector)
2. Check +2.1V (HQ500 base pin) >>>in case of play
B
E
C
no
Yes
Yes
Power ON/OFF ON no
1.Check F980，F981
2.Check PT903
3.Check RF982，RF983
4.Check CN902,CN701
5.Check IC900 of 3pin:9V ,
IC704 of 2pin:3.3V
6.IC701 of 22pin:3.3V
1. Check CN505 of 5pin.
2. Check IC502 SA5888 of 10pin
no
1. Check CN505 of 3pin.
2. Check IC502 SA5888 of 9pin
TroubleShootingGuide
MP3/CD Section
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4. Focusing operation
5. Spindle motor rotation
6. Read in CD/MP3 disc operation
7. Read in USB file and USB Encoding operation
Focusing
operation
Yes
no
1. Check (IC502 SA5888 of 13pin and 14pin)
13pin 3.95V >>3.99V, pin18 3.72V >> 3.75V >>>
in case of play.
2. Check +1.58V(IC500 M5673 or M5675 of 126pin).
Spindle motor
rotation
Yes
no 1. Check SPDO +1.90V(IC500 M5673 or M5675 of 123Pin)
in case of play。
2. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,
SL+ 3.91V.
3. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,
SP- 3.41V
Read in CD/MP3
disc
Yes
no
Yes
1. Check CN704
2. Check IC701 of 38pin and 39pin and 40pin
41pin and 44pin.
3. Check CN502,CW504.CN505
4. Check IC504 of 3pin:5.0V
5. Check Q501 collector:+3.3V
6. Check +3.3V (IC500 pin8/18/23/25/38/57/85/113/116/122)
7. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,
SP- 3.41V
8. Check SPDO +1.90V (IC500 M5673 or M5675 pin123)
9. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,
SL+ 3.91V
10. Check CD Board(Around IC solder short,cold soldering )
Yes
Read in USB file
operation
1. Check IC500(M5673 or M5675) of 52pin and 53pin.
2. Check CW507,CN707.
3. Check J702.
no
USB Encoding no
1. Check IC500 (M5675) of 52pin and 53pin.
2. Check CN502 7pin 8pin and 9pin.
3. Check IC500(M5675) 40pin,43pin input signal.
4. Check IC500(M5675) 33pin,36pin output signal.
TroubleShootingGuide
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Front Section
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Change to tuner function
AC cord in
Yes
no
Power ON/OFF ON
Yes
Yes
no
ST. LED on 1.Check IC101(TA2111N) of 11pin.
2.Check IC701(CA6808F) of 43pin
no
1.Check F980，F981
2.Check PT903
3.Check RF982，RF983
4.Check CN902,CN701
5.Check IC900 of 3pin:9V ,
IC704 of 2pin:3.3V
6.IC701 of 22pin:3.3V
LCD Display and back
light
1.Check LC701
2.Check IC701
3.Check LD701 and LD702
4.Check X701(32.768KHZ)
Yes
Tuner LCD Display no
1.Check IC102 of 2pin Voltage:3.3V
2.Check IC700(CS9255)
3.Check Q002(S9018) and
Q003(S9018).
4.Check IC701 (CA6808F) of 40pin and
41pin.
5.Check X702(32.768KHZ)
Yes
Yes
Function command no
Yes
1.Check IC701 of 7pin /8pin /9pin/10pin
2.Check SW701/SW702/SW703/SW704/
SW705/SW706/SW707/SW708/SW709/
SW710/SW711/SW712.
.
Ce manuel convient aux modèles suivants
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