DAEWOO AMI 829L, AMI 829R Service Manual

Service Manual

MINI COMPONENT SYSTEM

Model :

AMI-829L/R

DAEWOO ELECTRONICS CO., LTD.

MINI COMPONENT SYSTEM

AMI-829L/R

Table of Contents

SAFETY PRECAUTIONS......................................................................................... 2

ADJUSTMENTS....................................................................................................... 4

EXPLODED VIEW AND PARTS LIST ...................................................................... 6

WIRING DIAGRAM ................................................................................................... 9

BLOCK DIAGRAM .................................................................................................... 10

SCHEMATIC DIAGRAM ........................................................................................... 11

POWER / AMP /TUNER / TAPE .................................................................................................... 11

CD .................................................................................................................................................... 12

CONTROL ........................................................................................................................................ 13

PCB PATTERN LAYOUT ........................................................................................ 14

ELECTRICAL PART LIST ....................................................................................... 18

- 1 -

Safety Precautions

WARNING

THIS APPLIANCE TO RAIN OR MOISTURE.

CAUTION :

TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

THIS UNIT EMPLOYS A LASER. ONLY QUALIFIED SERVICE PERSONNEL SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE DUE TO POSSIBLE EYE INJURY.

CAUTION :

OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

CAUTION :

PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION :

LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'AU FOND.

: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE

CAUTION

RISK OF ELECTRIC SHOCKS

DO NOT OPEN

TO REDUCE THE RISK IF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULTED "DANGEROUS VOLTAGE"

WITHIN THE PRODUCT'S ENCLOSURE THAT MAY BE

SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE.

CAUTION

LASER SAFETY

USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES

TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF

POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE

Important Safety Instructions

- All the safety and operating instructions should be read before the appliance is operated.

- The safety and operating instructions should be retained for future reference.

- All warnings on the appliance and in the operating instructions should be adhered to.

- All operating and use instructions should be followed.

1. Water and Moisture - The appliance should not be

water - for example, near a bathtub, washbowl, kitchen sink,

used near

laundry tub, in a wet basement, or near a swimming pool, and the like.

PORTABLE CART

Figure 2

only as recommended by the manufacturer.

ceiling

5. Ventilation - The appliance should be situated so location or position does not interfere with ventilation. For example, the appliance on a bed, sofa, rug, or ventilation as a bookcase or cabinet that may impede the flow

through the ventilation openings.

6. Heat - The appliance should be situated away from sources such as radiators, heat registers, appliances (including amplifiers) that

7. Power Sources - The appliance should be power supply only of the type instructions or as marked

8. Grounding or Polarization - The precautions that taken so that the grounding or

appliance is not defeated.

9. Power - Cord Protection - Power-supply cords routed so that they are not likely to be by items placed upon or attention to cords at point where

10.Protective Attachment Plug - The appliance is equipped with an attachment plug having overload safety feature. resetting of required, be sure the replacement plug

same overload protection as the original plug.

11.Cleaning - The appliance should be cleaned only as recommended by the manufacturer.

12.Power Lines - An outdoor antenna should be located from power lines.

openings; or, placed in a built-in installation, such

protective device. If replacement of the plug is

2. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by th manufacturer.

3. An appliance and cart combination should

be moved with care. Quick

stops, excessive force, and uneven surfaces may cause the appliance

and

cart combination to overturn.

4. Wall or Ceiling Mounting - The appli-

ance

should be mounted to a wall or

its proper

should not be situated

similar surface that may block the

stoves, or other

produce heat.

connected to a

described in the operating

on the appliance.

polarization means of an

walked on or pinched

against them, paying particular

plugs, convenience receptacles, and the

they exit from the appliance.

protection. This is a

See Instruction Manual for replacement or

service technician has used a

specified by the manufacturer that has the

that its

should be

of air

heat

away

- 2 -

Safety Precautions

13.Outdoor Antenna Grounding - If an outside antenna connected to the receiver be sure the antenna

system is

grounded so as to provide some protection against voltage surges and built-up static Electrical Code, regard to

proper grounding of the mast and supporting

charges. Article 810 of the National

ANSI/NFPA 70, provides information with

structure, grounding of the lead-in wire to an antenna-dis charge unit, size of grounding conductors,location of antennadischarge unit, connection to grounding electrodes and requirements for the grounding electrode. See Figure 1.

EXAMPLE OF ANTENNA GROUNDING

GROUND CLAMP

ELECTRIC SERVICE EQUIPMENT

NEC - NATIONAL ELECTRICAL CODE

POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250 PART H)

ANTENNA LEAD IN WIRE

ANTENNA DISCHARGE UNIT (NEC SECTION 810-20)

GROUNDING CONDUCTORS (NEC SECTION 810-21)

GROUND CLAMPS

14.Non-use Periods - The power cord of the appliance should be unplugged from the outlet when left

unused for a long period

of time.

15.Object and Liquid Entry - Care should be taken so

that objects do not fall and liquids are not spilled into the enclosure through openings.

16.Damage Requiring Service - The appliance should

serviced by qualified service personnel when: a) The power-supply cord or the plug has been b) Objects have fallen, or liquid has been spilled

damaged; or

into the appliance; or c) The appliance has been exposed to rain; or

d) The appliance does not appear to operate exhibits a marked change in

performance; or

e) The appliance has been dropped, or the

normally or

enclosure

damaged.

17.Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions.

All other servicing

should be referred to qualified service

personnel.

- 3 -

Adjustments

Output Level

1. TUNER SECTION

TEST EQUIPMENT

FM RF SSG

75 ohm Coaxal

FM Antenna

Terminal(75 ohm)

1. Signal Generator with a frequency range of FM broadcast.

2. Oscilloscope with a side amplifier of approximately 100 KHz.

3. FM 75/50Ω dummy antenna.

4. VTVM

Carrier Frequency : 98MHz Output Level : 26dBuV Modulation:Audio 1kHZ, 75kHz Deviation

SET

FM ALIGNMENT

1. Turn on the FM signal generator and the VTVM allowing 15 minutes warming-up period.

2. Connect the VTVM across the headphone jack or speaker terminal.

3. Set signal generator frequency as listed in ALIGNMENT CHART and maintain a sufficient output level to provide an indication on VTVM.

NOTE

1. Use a screwdriver with plastic or ceramic grip for all adjustments.

2. Standard test frequency 1 KHz and deviation 75 KHz for FM.

- FM RF, IF ALIGNMENT CHART -

Step Item Input Circuit Setup Output Circuit Setup Tuner Setting Adjust Point Adjustment

FM IF

Adjustment

Auto Stop Sensitivity

Connect stereo signal

generator to FM ANT

terminal (J001)

Connect stereo signal

generator to FM ANT

terminal (J001)

Connect DC voltme-

ter across R201

Connect DC voltme-

ter across RV201

FM98MHz75KHz

Dev. 26dB

FM 98MHz

75KHz Dev.

26dB

L203

RV201

Adjust for DC 0V±0.1V

Adjust for DC

1.17V±0.02V

Confirm stereo indica-

tor is lighted and L/R

channel is separated.

Unless other specified set being switched FM mode, adjust generator's frequency to center of the FM band where no FM broadcast exists Otherwise adjustment of FM usable sensitivity, frequency range for FM band are not needed, but confirm these data are satisfied with specification. CAUTION : When realigning the FM receiving frequency the highest end of the frequency range should not be more than 108 MHz and the lowest end of the frequency range should not be less than 87.5 MHz, in order to comply with FTZ regulation in West Germany.

2. TAPE SECTION

Measurement

Point

47 kohm

Input Level Measurement Point

R-CH

L-CH

Test Tape be used

Tape Contents Use

MTT-111N 3 KHz Tape Speed Adjustment MTT-114N 10 KHz Head Azimuth Adjustment MTT-5511 Blank Record Frequency Property

HEAD ADJUSTMENT (AZIMUTH)

1. 10KHz test tape(example: MTT-114N) must be used for this adjustment.

2. Connect to a VTVM or oscilloscope to the headphone jack or speaker terminal.

3. Press the play button.

4. Adjust the azimuth by using a screwdriver to maintain the max. L&R output voltage.

5. Adjust tape A(1), tape B(2) respectively, Please secure the azimuth position by using locking paint.

Input Point

VTVM

Scope

- 4 -

Adjustments

Frequency Counter

Test Tape

RECORDING BIAS OSCILLATOR FREQUENCY ADJUSTMENT

1. Connect the frequency counter to TP603, GND.

2. Press the REC button.

3. Adjust L603 to obtain 80 KHz±100Hz

TAPE ALIGNMENT CHART

Step Item Reference Value Test Tape Adjust Point Test Point Note FIG.

Normal 3,015~3,025Hz MTT-111N RV601

Tape Speed Adjustment

Normal 3,000~3,010Hz MTT-111N RV601

High 5,820~6,180Hz MTT-111N - - - - - -

2 Azimuth Adjustment

Recording Bias Oscilla-

tor Frequency Adjustment

Maximum Level Phase:Within90°

80 KHz± 0.5

Line Out L/R Channel

Shorted TP601, TP602

MTT-114N Head Screw

Line Out L/R Channel

MTT-5511 L603 TP603, GND

Confirm Wow & Flutter is within 0.35%

Confirm Tape Speed of end position after adjustment at tape start position

Confirm High speed after normal speed adjustment

Adjust with frequency counter connected.

FIG.1

FIG.2,3,4

FIG.1

Test Tape : MTT-111N(3kHz)

MTT-5511(Blank)

Set

Output Level Measurement Point

FIG. 1 : Tape Speed & Record Bias Oscillator

Frequency Adjust Circuit

L-CH Peak

within

1 dB

R-CH

Screw Angle

Peak

Output Level

L-CH Peak

R-CH

Peak

within

1 dB

Screw Angle

Adjust with Frequency

Counter Connected

Forward

Side

Reverse

Side

FIG. 2 : Tape Azimuth Adjust Location

(Record/Playback Head)

MTT-114N

(10kHz)

L-CH

Set

Screen Pattern

In Phase 45 90 135 180

Good Wrong

Oscilloscope

V H

Output Level Measurement Point

FIG. 3 : Tape Azimuth Adjust Head Screw & Waveform

FIG. 4 : Tape Azimuth Adjust Circuit & Waveform

- 5 -

Exploded View and Mechanical Parts List

Model No:AMI-829L/R

- 6 -

Exploded View and Mechanical Parts List

Model No:AMI-829L/R

NO PARTS NAME CODE NO. DESCRIPTIONS Q'TY REMARKS

1 WINDOW DOOR A/B

2 DOOR COVER A/B

3 DOOR FRAME A/B 4 SPRING DOOR EJECT L 9CD30080L0 STS 1

5 SPRING DOOR EJECT R 9CD30080R0 STS 1 6 CUSHION FOOT 9CD4207700 7 KNOB VOLUME 9CD1337000 MIPS 1

DAMPER BASE "B"

DAMPER GEAR "B" LOCKER BASE

LOCKER CAM

LOCKER SPRING 10 KNOB JOG DIAL 9CD1336800 MIPS 1 11 BRKT SIDE 9CD2412900 ABS 2 12 PANEL FRONT 9CD0308000 MIPS 1 13 WINDOW FLT 9CD1616700 ACRYL 1 14 KNOB CONTROL "A" 9CD13399A0 MIPS 1 15 KNOB CONTROL "B" 9CD13399B0 MIPS 1 16 KNOB FUNCTION 9CD1340000 ACRYL 1 17 PLATE FILTER 9CD0911200 LEXAN (T=0.125) 1 18 KNOB CONTROL "C" 9CD13399C0 MIPS 1 19 GUIDE FLT 9CD2506300 ABS 1 20 RING REFLECTOR 9CD3103700 ACRYL 1 21 BADGE BRAND ABS,STAMPING 1 22 CASS DECK MECHA 9CD6007800 S/S ADR 243AMW 1 AUTO REVERSE 23 DOOR CD 9CD1811400 MIPS 1

9CD16166A0 9CD16166B0

9CD18115A0 9CD18115B0

9CD1809400 9CD1809500

9CD2603300 9CD2603290

9CD0B01400 9CD0B01500 9CD0B01600

ACRYL

MIPS

URETHAN FOAM RUBBER

ABS ACETAL

ABS ACETAL PW-1

1 1

2 2

2 2 2

24 CD DECK MECHA

25 COVER TOP 26 COVER SIDE "L" 9CD0409200 MIPS 1

27 COVER SIDE "R" 9CD0409300 MIPS 1 28 CHASSIS BOTTOM 9CD0607100 SECC T1.0 1 29 HEAT SINK N50 9CD4405800 AL 7.0T 1 AMI-829L(50W) 30 HOLDER AC CORD 9CD2303300 ABS 1

9CD6007100 9CD6006900

9CD0409600 9CD0409100

CMS FR3 B TYPE DCC-01B

MIPS 1

- 7 -

W/O HOLE WITH HOLE

Exploded View and Mechanical Parts List

Model No:AMI-829L/R

NO PARTS NAME CODE NO. DESCRIPTIONS Q'TY REMARKS

31 COVER BACK 9CD0409813 MIPS 1 32 BRKT HEAT SINK 9CD2414600 SECC 1.0T 2 AMI-829L(50W) 33 BRKT HEAT SINK 9CD2414400 STS 1 AMI-829L(50W) 34 PLATE MICA "A" 9CD0910600 MICA 2 35 DECO MD DOOR 9CD1003100 MIPS 1 36 PLATE EON 9CD0911300 PVC 0.5T 1 DSP OPTION

S1 SCREW TAPTITE 7173261011 TT2 BIN 2.6X10 MFZN 12 S2 SCREW TAPTITE 7173301011 TT2 BIN 3X10 MFZN 15 S3 SCREW TAPTITE 7173301212 TT2 BIN 3X12 BK 25 S4 SCREW TAPTITE 7173400611 TT2 BIN 4X6 MFZN 8 S5 SCREW TAPTITE 7173300611 TT2 BIN 3X6 MFZN 5 S6 WASHER SCREW 9CD3102400 TT2 BIN 3X10+D14 1 S7 WASHER SCREW 9CD3102401 TT2 BIN 3X8+D10 4 AMI-829L(50W) S8 SCREW TAPTITE 7173301412 TT2 BIN 3X14 BK 2 AMI-829L(50W)

P1 PCB CD 9CD6574800 197 X 123 X 1.6T 1 P2 PCB FRONT 9CD6580300 247 X 139 X 1.6T 1 AMI-829(50W) P3 PCB MAIN 9CD6580500 319 X 197 X 1.6T 1 AMI-829(50W) P4 PCB POWER 9CD6580600 106.5 X 88 X 1.6T 1 AMI-829(50W) P5 PCD OPTICAL JACK 9CD6577800 29 X 21.5 X 1.6T 1

- 8 -

WIRING DIAGRAM

Model No:AMI-829L/R

SN:9738832101 7P 250MM

SN:9738833900 10P 350MM

CW900

P/T

30W

SN : 9738835000 3P 260MM

CW704

50W

SN : 9738804300 7P 350MM

CW703

10P CONN PINSN : 9736407800

SN : 9736407600 13P CONN PIN

SN : 9738833700 8P 220MM

FUNCTION

CN400

CN401

CW601

CW602

CW600

CW400

FD701

IC702

TUNER

CN900

CW508

SN:9738840900 19P 110MM

Pick-Up

CW503CW501

CN502

CW502

CN509

CW507

CN502 SN:9738824100 2P 400MM

SN:9738840800 16P 250MM

PLAY HEAD

R/P HEAD

CW401

CW402

SN : 9738834000 11P 150MM

SN : 9738834100 13P 100MM

- 9 -

CW508

CN703CN704CN701

CD MECHA. ASS'Y

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