Daewoo NC-8112E Manual de usuario

Service Manual

Mini Component Sound System

OCT.2011

NC-8112E/NC-8114E/NC-8115E/NC-8117E

S/N : FCD8308000

SAFETY PRECAUTIONS ......................................................................................... 1

TROUBLE SHOOTING GUIDE ................................................................................ 2

EXPLODED VIEW AND MECHANICAL PARTS LIST ............................................. 3

WIRING DIAGRAM ................................................................................................... 4

BLOCK DIAGRAM .................................................................................................... 5

SCHEMATIC DIAGRAM

...........................................................................................

FRONT&TUNER Section

MP3/CD Section

P.C.B PATTERN LAYOUT

.........................................................................................

FRONT Section

MP3/CD Section

APPENDIX-ELECTRICAL PART LIST ................................................................... 8

Table of Contents

Mini component sound system

NC-8112E/NC-8114E/NC-8115E/NC-8117E

SMPS Section

TUNER Section

SMPS Section

MAIN Section

SafetyPrecautions

MP3/CD Section

Trouble Shooting Guide

CD open and disc insert Refer to 2

Spindle motor rotation

Pick-up unit return(outside >> inside)

and Rollette rotation

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

MP3/CD Section

Trouble Shooting Guide

1. Pick-up unit return

2. CD o

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 CD no

1.Check CN704

2.Check IC707(MCU IC) of 23/24/25/26/27/28pin

3.Check IC705 of 5/12/13pin

4. Check CN502,CW504.CN505

5. Check IC504 of 3pin:5.0V

6. Check Q501 collector:+3.3V

7. Check +3.3V (IC500 pin8/18/23/25/38/57/85

/113/116/122)

8. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,

SP- 3.41V

9. Check SPDO +1.90V (IC500 M5675 pin123)

10. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,

SL+ 3.91V

11. Check CD Board(Around IC solder short,cold soldering )

CD open and disc insert

Yes

CD close and cd on

Laser diode on

Yes

Focusing operation

1. Check +1.8V LD on(HQ500 collector)

2. Check +2.1V (HQ500 base pin) >>>in case of play

Yes

Power ON/OFF ON no

1. Check CN505 of 5pin.

2. Check IC502 SA5888 of 10pin

1. Check CN505 of 3pin.

2. Check IC502 SA5888 of 9pin

1.Check CN700

2.Check IC701 of 33pin/40pin:3.3V

3..Check IC707(MCU IC) of 32pin:(main power on)

MP3/CD Section

Trouble Shooting Guide

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

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 M5675 of 126pin).

Spindle motor

rotation

Yes

no 1. Check SPDO +1.90V(IC500 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

1.Check CN704

2.Check IC707(MCU IC) of 23/24/25/26/27/28pin

3.Check IC705 of 5/12/13pin

4. Check CN502,CW504.CN505

5. Check IC504 of 3pin:5.0V

6. Check Q501 collector:+3.3V

7. Check +3.3V (IC500 pin8/18/23/25/38/57/85/113/116/122)

8. Check (IC502 SA5888 of 17pin and 18pin)SP+ 4.41V ,

SP- 3.41V

9. Check SPDO +1.90V (IC500 M5675 pin123)

10. Check (IC502 SA5888 of 12pin and 11pin) SL- 3.81V,

SL+ 3.91V

11. Check CD Board(Around IC solder short,cold soldering )

Yes

Read in USB file

operation

1. Check IC500(M5675) of 52pin and 53pin.

2. Check CW507,CN707.

3. Check J702.

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.

Trouble Shooting Guide

Front & Tuner Section

AC cord in

Yes

Power ON/OFF ON

Yes

VFD Display

Function command no

Yes

1.Check IC707(MCU IC) of 44/45/46/47/48pin

2.Check SW701/SW702/SW703/SW704/

SW705/SW706/SW707/SW708/SW709/

SW710/SW711/SW712/SW713/SW714

SW715/SW716/SW717/SW718/SW719.

Function LED light no

1.Check CN700 of 10pin:5V

2.Check LD705/LD706/LD707/LD709/

LD710/LD711/LD712/LD713/LD714/

LD715

Yes

1.Check CN700

2.Check IC701 of 33pin/40pin:3.3V

3.Check IC707(MCU IC) of 32pin:(main power on)

1.Check CN702

2.Check FD701(VFD)

3.Check IC701(SC16315)

Trouble Shooting Guide

Front & Tuner Section

Change to tuner function no

1.Check IC707(MCU IC) of 27/28/31pin

2.Check CN703

3.Check CW703

4.Check IC105(TUNER IC)

5.Check X104(12MHZ)

Yes

Change to CD function

1.Check CN704

2.Check IC707(MCU IC) of 23/24/25/26/27/28pin

3.Check IC705 of 5/12/13pin

Yes

Phones sound

1.Check J301

2.Check IC702(IL4560D)

3.Check CN700

Trouble Shooting Guide

SMPS & AMP Section (Only NC-8112E Model)

AC cord in

Tuner/AUX/CD/USB Speaker

sound no

Phones sound no

Power ON/OFF ON

Yes 1.Check F901

2.Check PT901

3.Check CW902 of 6pin:3.3V

4.Check CW902 of 7pin:(main power on)

5.Check CN700

6.Check IC707(MCU IC)of 33pin/40pin:3.3V

7.Check IC707(MCU IC) of 32pin:(main power

on)

VFD Display

1.Check CW903

2.Check CN702

3.Check FD701(VFD)

4.Check IC701(SC16315)

1.Check J301

2.Check IC702(IL4560D)

3.Check CN700

Yes

1.Check CW901 of 1/2pin voltage:22V

2.Check CN801 of 1/2pin voltage:22V

3.Check IC800(TDA7492P): Voltage of 6/7pin

and 12/13pin :22V

4.Check IC800(TDA7492P):Voltage of 20pin and

21pin :3.3V

5.Check IC801(SA1117BH-3.3):Voltage of

2pin :3.3V

6.Check IC400(SC7314S):

Voltage of 1pin: normal DC(9V).

7.Check TUNER/AUX/CD input signal

8.Check output signal pin of IC800(TDA7492P)

2/3pin, 8/9pin and 10/11pin,16/17pin.

9.Check output signal terminals(J800).

Yes

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