Daewoo AMI-308MC, AMI-508MC, AMI-311MC, AMI-511MC, AMI-208MCJ User Manual

...

Service Manual

MINI COMPONENT SYSTEM

Model :

AMI-208MC/208MCJ AMI-308MC/308MCE AMI-508MC AMI-211MC AMI-311MC AMI-511MC

DAEWOO ELECTRONICS CO., LTD.

TABLE OF CONTENTS

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

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

EXPLODED VIEW AND PARTS LIST ................................................................................. 7

AMI-208MC / 308MC / 508MC ......................................................................................................... 7

AMI-211MC / 311MC / 511MC ......................................................................................................... 9

WIRING DIAGRAM ...................................................................................................... 11

BLOCK DIAGRAM ....................................................................................................... 12

SCHEMATIC DIAGRAM................................................................................................ 13

POWER / AMP.................................................................................................................................... 13

CD.................................................................................................................................................... 17

TUNER (2BAND).................................................................................................................................. 18

TAPE.................................................................................................................................................. 19

CONTROL.......................................................................................................................................... 20

PCB PATTERN LAYOUT.................................................................................................. 22

ELECTRICAL PARTS LIST................................................................................................ 24

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

ceiling only as recommended by the manufacturer.

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 similar surface that may block the ventilation openings; or, placed in a built-in installation, such 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 described in the operating instructions or as marked on the appliance.

8. Grounding or Polarization - The precautions that taken so that the grounding or polarization means of an

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 against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

10.Protective Attachment Plug - The appliance is equipped with an attachment plug having overload safety feature. See Instruction Manual for replacement or resetting of protective device. If replacement of the plug is required, be sure the service technician has used a replacement plug specified by the manufacturer that has the

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.

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

that its

its proper

should not be situated

stoves, or other

produce heat.

connected to a

should be

walked on or pinched

protection. This is a

of air

heat

away

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 charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting

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

normally or exhibits a marked change in performance; or e) The appliance has been dropped, or the

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.

ADJUSTMENTS

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 to edge R201

Connect DC voltme-

ter to edge of RV201

FM98MHz75KHz

Dev. 26dB

FM 98MHz

75KHz Dev.

26dB

L203

RV201

Adjust forDC 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. CD SECTION

Note:

1. Use the oscilloscope with more than 10M

2. Clean an object lens by an applicator with natural detergent when the signal level is lower than specified value

with the following checks.

RF LEVEL CHECK

1. Connect oscilloscope to test point TP502 and IC502 Pin66 on CD PCB.

2. Press power switch on.

3. Put test disc(TCD-781) in and press play button then pause button.

4. Confirm that oscilloscope waveform is clear. Clear RF signal waveform means that the shape"#"can be clearly distinguished at the center of waveform.

5. Adjust RV501 to get a clear waveform and maximum amplitude.

Ω

impedance.

RF Signal Waveform

VOLT/DIV : 200mV

TIME/DIV : 50ns

Level : 1.2+0.3Vp-p

E-F BALANCE ADJUSTMENT

Output Level

1. Connect oscilloscope to test point TP502 and TP503 on CD PCB.

2. Press power switch on.

3. Put test disc(TCD-781) in and press play button then pause button.

4. Pressing Fast Forward button, adjust RV502 to get that the oscilloscope waveform is symmetrical on the bottom in relation to 0V, and check this level. * Design and specifications may be subject to change without notice.

3. TAPE SECTION

ADJUSTMENTS

Traverse Waveform

Measurement

Input Level Measurement Point

Point

R-CH

L-CH

47 kohm

Input Point

VTVM

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 VTVM or oscilloscope to the headphone jack or speaker terminal.

3. Press the play button.

4. Adjust the azimuth by using a screw driver 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.

Scope

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

ADJUSTMENTS

Frequency Counter

Test Tape

TAPE ALIGNMENT CHART

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

Normal

Tape Speed Adjustment

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

2 Azimuth Adjustment

Recording Bias Oscilla-

tor Frequency Adjustment

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

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

Maximum Level Phase:Within90°

80 KHz±0.5

MTT-114N Head Screw

MTT-5511 L603

Line Out L/R Channel

Shorted TP601, TP602

Line Out L/R Channel

TP603,GND

Confirm Wow & Flutter is within 0.35%

FIG.1

Confirm Tape Speed of end position after adjustment at tape

FIG.1 start position Confirm High speed

after normal speed

FIG.1 adjustment

FIG.2,3,4 Adjust with frequency

counter connected. 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

EXPLODED VIEW AND PARTS LIST

1. AMI-208MC / 308MC / 508MC

EXPLODED VIEW AND PARTS LIST

NO. PART NAME CODE NO. DESCRIPTION 208MC 308MC 508MC

1 WINDOW DOOR A 9CD1612500 ACRYL SMOG 1 1 1 2 WINDOW DOOR B 9CD1612600 ACRYL SMOG 1 1 1 3 DOOR CASS A 9CD1808500 MIPS 1 1 1 4 DOOR CASS B 9CD1808600 MIPS 1 1 1 5 SPRING DOOR EJECT 9CD3004500 PW-1 2 2 2 6 SPRING C HOLDER 9713008900 STS T0.2 4 4 4 7 WINDOW FLT 9CD1612700 ACRYL VIOLET 1 1 1 8 KNOB VOLUME 9CD1332800 ABS 1 1 1

9 SHAFT WASHER 9CD3601600 ACETAL 1 1 1 10 CUSHION FOOT 9CD4207700 URETHAN FOAM RUBBER 2 2 2 11 PANEL FRONT 9CD0305100 MIPS 1 1 1 12 BRKT SIDE 9CD2412900 ABS 1.5GR 2 2 2 13 DAMPER AS 9CD2602800 DA-12 1 1 1 14 SHAFT VR 9CD3601500 ACETAL 1 1 1 15 KNOB CD 9CD1332200 ACRYL --- 1 1 16 BADGE DAEWOO 9CD1500900 ABS HOT STAMPING 1 1 1 17 WINDOW FRONT 9CD1612800 ACRYL 1 1 1

17-1 KNOB EQ DUMMY 9CD1335500 ACRYL 1 1 1

18 KNOB FUNCTION 9CD1332300 ABS 1 1 1 19 KNOB POWER 9CD1332500 ABS 1 1 1 20 KNOB PRESET 9CD1332400 ABS 1 1 1 21 KNOB HI SPEED 9CD1332600 ABS 1 1 1 22 GUIDE FLT 9CD2505600 ABS 1 1 1 23 KNOB EQ 9CD1332700 ABS 1 1 1 24 KNOB DECK A 9CD1332900 ABS 1 1 1 25 KNOB DECK B 9CD1333000 ABS 1 1 1 26 DECK MECHANISM 9CD6006200 ADR 2010 FW2 (SAMSUNG) 1 1 1 27 DOOR CD 9CD1808700 MIPS 1 1 1 28 HEAT SINK 9CD4402800 BSP 0.5T 1 1 1 29 CD DECK MECHANISM 9CD6006100 3CD CH, S/S, W/O PCB ASSY 1 1 1 30 PLATE MAGNET 9CD0909300 --- --- 1 32 COVER TOP 9CD0409100 MIPS --- --- 1

32-1 COVER TOP 9CD0409600 MIPS 1 1 ---

33 COVER SIDE L 9CD0409200 MIPS 1 1 1 34 COVER SIDE R 9CD0409300 MIPS 1 1 1 35 CHASSIS BOTTOM 9CD0607100 SECC T1.0 1 1 1 36 BRKT PCB A 9CD2413100 SECC T1.0 --- --- 1 37 HEAT SINK TR 9CD4403200 BSP T1.0 --- 4 4

NO. PART NAME CODE NO. DESCRIPTION 208MC 308MC 508MC

38 HEAT SINK 9CD4403700 AL - EX --- --- 1 38-1 HEAT SINK 9CD4403900 AL SHEET --- 1 --38-2 HEAT SINK 9CD4405100 AL SHEET 1 --- ---

39 HOLDER AC CODE 9CD2303300 ABS 4.0GR 1 1 1

40 COVER BACK 9CD0409400 MIPS 1 1 1

41 BRACKET ANT 9CD2411100 SCP-1 T0.8 BK SPRAY 1 1 ---

P1 PCB MAIN 1 1 1

P2 PCB FRONT 1 1 1

P3 PCB CD --- 1 1

P4 PCB POWER 1 1 1

S1 SCREW TAPTTITE 7173261011 TT2 BIN 2.6X10 MFZN 12 16 16

S2 SCREW TAPTTITE 7173301012 TT2 BIN 3.0X5 MFZN --- --- 1

S3 SCREW TAPTTITE 7173301212 TT2 BIN 3.0X10 MFZN 34 38 40

S4 SCREW TAPTTITE 7173400611 TT2 BIN 3.0X12 MFZN BK 5 5 5

S5 SCREW TAPTTITE 7173300611 TT2 BIN 4.0X6 MFZN 4 6 8

W1 WASHER SCREW 9CD3102400 TT2 BIN 3.0X10 + D14 1 1 1

2. AMI-211MC / 311MC / 511MC

EXPLODED VIEW AND PARTS LIST

No Parts Name Parts Code Description

Q'ty

211MC 311MC 511MC

1 PANEL FRONT 9CD0305400 MIPS 1 1 1

9CD1808900 MIPS 1 1 1

2 DOOR CASS. A/B

9CD1809000 MIPS 1 1 1 3 SPRING DOOR EJECT 9CD3004500 PW-1 1 1 1 4 SPRING C HOLD 9CD3003900 STS T0.2 1 1 1 5 DAMPER AS 9CD2602800 DA-12 1 1 1 6 DECK MECHANISM 9CD6006200 S/S , ADR2010FW2 1 1 1 7 DOOR CD 9CD1808800 MIPS 1 1 1 8 WINDOW FRONT 9CD1613400 ACRYL, BLACK 1 1 1 9 WINDOW FLT 9CD1613300 ACRYL, SMOG 1 1 1

9CD1613100 ACRYL, VIOLET 1 1 1

10 WINDOW DOOR A/B

9CD1613200 ACRYL, VIOLET 1 1 1

11 KNOB CD 9CD1332200 ABS 1 1 1 12 KNOB POWER 9CD1333700 ABS 1 1 1 13 KNOB CD A 9CD1333200 ABS 1 1 1 14 KNOB FUNCTION 9CD1333400 ABS 1 1 1 15 KNOB TIMER 9CD1333800 ABS 1 1 1 16 KNOB EQ 9CD1333300 ABS 1 1 1 17 KNOB VOLUME 9CD1333600 ABS 1 1 1 18 SHAFT VOL 9CD3601700 ACETAL 1 1 1 19 SHAFT ST 9CD3601800 ACETAL 1 1 1

9CD1333900 ABS 1 1 1

20 KNOB DECK Auto/Play

9CD1334000 ABS 1 1 1

21 BRKT SIDE 9CD2412900 ABS 2 2 2 22 BRKT PCB B 9CD2413200 SECC T1.0 2 2 2 23 CUSHION FOOT 9CD4207700 URETHAN FOAM RUBBER 2 2 2 24 COVER TOP 9CD0409600 MIPS 1 1 1 25 SPRING TUNING 9CD3007000 SUS 1 1 1 26 CD DECK MECHANISM 9CD6006100 3CD CH, S/S, W/O PCB ASSAY 1 1 1

9CD0409200 MIPS 1 1 1

27 COVER SIDE L/R

9CD0409300 MIPS 1 1 1

28 HEAT SINK 9CD4402800 BSP T0.5 1 1 1 29 CHASSIS BOTTOM 9CD0607100 SECC T1.0 1 1 1 30 BRKT PCB A 9CD2413100 SECC T1.0 1 1 1

31 HEAT SINK 9CD4404000 AL 30W --- --- --31-1 HEAT SINK 9CD4405000 AL 20W --- --- 1 31-2 HEAT SINK 9CD4404500 AL 10W --- 1 ---

No Parts Name Parts Code Description

Q'ty

211MC 311MC 511MC

31-3 HEAT SINK 05 9CD4405100 AL 5W 1 --- ---

32 HEAT SINK TR 9714403200 AL-EX 1 1 1 33 DECO FRONT 9CD1002300 ABS 1 1 1 34 COVER BACK 9CD0409400 MIPS 1 1 1 35 BADGE DAEWOO 9CD1500900 ABS, HOT STAMPING 1 1 1 36 GUIDE FLT 9CD2505600 ABS 1 1 1 37 HOLDER AC CORD 9CD2303300 ABS 1 1 1 38 BRKT H. SINK 9CD2413900 SUS 0.3 1 1 1 P1 PCB MAIN 1 1 1 P2 PCB FRONT 1 1 1 P3 PCB CD 1 1 1 P4 PCB POWER 1 1 1 P5 PCB TAPE S1 SCREW TAPTTITE 7173300811 TT2 BIN 3.0X 8 MFZN 4 4 4 S2 SCREW TAPTTITE 7173301011 TT2 BIN 3.0X10 MFZN 23 23 23 S3 SCREW TAPTTITE 7173261011 TT2 BIN 2.6X10 MFZN 17 17 17 S4 SCREW TAPTTITE 7173301212 TT2 BIN 3X12 MFZN BK 25 25 25 S5 SCREW TAPTTITE 7173400611 TT2 BIN 4X6 MFZN 6 6 6 S6 SCREW TAPTTITE 7173300511 TT2 BIN 3X5 MFZN 1 1 1 S7 WASHER SCREW 9CD3102400 TT2 BIN 3X10 + D14 1 1 1

W WASHER I:3.2, O: 6.0 1 1 1

WIRING DIAGRAM

AMI-208MC / 308MC / 508MC / 211MC / 311MC / 511MC

BLOCK DIAGRAM

AMI-208MC / 308MC / 508MC / 211MC / 311MC / 511MC

SCHEMATIC DIAGRAM

1. POWER / AMP

AMI-208MC / 211MC

SCHEMATIC DIAGRAM

AMI-208MCJ

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