background image

4

ADJUSTMENTS

1.  TUNER SECTION

TEST EQUIPMENT

1.  Signal Generator with a frequency range of FM broadcast.
2.  Oscilloscope with a side amplifier of approximately 100 KHz.
3.  FM 75/50

 dummy antenna.

4.  VTVM

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 - 

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 specifi-
cation.
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

Ω 

impedance.

   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.

Step

Item

Input Circuit Setup Output Circuit Setup

Tuner Setting

Adjust Point

Adjustment

1

FM IF 

Adjustment

Connect stereo signal 

generator to FM ANT 

terminal (J001)

Connect DC voltme-

ter to edge R201

FM98MHz75KHz 

Dev. 26dB

µ

L203

Adjust forDC 0V

±

0.1V

2

Auto Stop 

Sensitivity

Connect stereo signal 

generator to FM ANT 

terminal (J001)

Connect DC voltme-

ter to edge of RV201

FM 98MHz 

75KHz Dev. 

26dB

µ

RV201

Adjust for DC 
1.17V

±

0.02V 

Confirm stereo indica-

tor is lighted and L/R 

channel is separated.

SET

FM Antenna

Terminal(75 ohm)

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

FM RF SSG

75 ohm Coaxal

Level : 1.2+0.3Vp-p

RF Signal Waveform

VOLT/DIV : 200mV

TIME/DIV : 50ns

All manuals and user guides at all-guides.com

Summary of Contents for AMI-921DP

Page 1: ...Service Manual MINI COMPONENT SYSTEM Model DAEWOO ELECTRONICS CO LTD AMI 921DP 921DPR All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 2: ...RECAUTIONS 2 ADJUSTMENTS 4 EXPLODED VIEW AND PARTS LIST 7 WIRING DIAGRAM 9 BLOCK DIAGRAM 10 SCHEMATIC DIAGRAM 11 POWER AMP 11 CD 12 TUNER 13 TAPE 16 CONTROL 17 PCB PATTERN LAYOUT 18 All manuals and us...

Page 3: ...hat 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 over...

Page 4: ...l and liquids are not spilled into the enclosure through openings 16 Damage Requiring Service The appliance should be serviced by qualified service personnel when a The power supply cord or the plug h...

Page 5: ...regulation in West Germany 2 CD SECTION Note 1 Use the oscilloscope with more than 10M impedance 2 Clean an object lens by an applicator with natural detergent when the signal level is lower than spec...

Page 6: ...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 respective...

Page 7: ...ing Bias Oscilla tor Frequency Adjust ment 80 KHz 0 5 MTT 5511 L603 TP603 GND Adjust with frequency counter connected FIG 1 FIG 1 Tape Speed Record Bias Oscillator Frequency Adjust Circuit Test Tape M...

Page 8: ...7 EXPLODED VIEW AND PARTS LIST AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 9: ...PS 2 25 DOOR CD 9CD1810100 MIPS 1 26 HEAT SINK 9CD4402800 BSP T 0 5 1 27 CD MECHANISM 9CD6007100 CMS FR3 B TYPE 1 28 COVER TOP 9CD0409600 MIPS 1 29 COVER SIDE L 9CD0409900 MIPS 1 30 CHASSIS BOTTOM 9CD...

Page 10: ...9 WIRING DIAGRAM AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 11: ...10 BLOCK DIAGRAM AMI 921DP 921DPR All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 12: ...11 SCHEMATIC DIAGRAM 1 POWER AMP AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 13: ...12 SCHEMATIC DIAGRAM 2 CD AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 14: ...13 SCHEMATIC DIAGRAM 3 TUNER AMI 921DP 921DPR 2 Band All manuals and user guides at all guides com...

Page 15: ...14 SCHEMATIC DIAGRAM AMI 921DP 921DPR FTZ 2 Band All manuals and user guides at all guides com...

Page 16: ...15 SCHEMATIC DIAGRAM AMI 921DP 921DPR FTZ 3 Band All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 17: ...16 SCHEMATIC DIAGRAM 4 TAPE AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 18: ...17 SCHEMATIC DIAGRAM 5 CONTROL AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 19: ...18 PCB PATTERN LAYOUT AMP TUNER AMI 921DP All manuals and user guides at all guides com...

Page 20: ...19 PCB PATTERN LAYOUT CD TAPE AMI 921DP 921DPR AMI 921DP 921DPR POWER AMI 921DP 921DPR All manuals and user guides at all guides com...

Page 21: ...20 PCB PATTERN LAYOUT POWER CONTROL AMI 921DP 921DPR AMI 921DP 921DPR All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 22: ...25 C ELECTRO CEXE1C102A 1 16V RS 1000MF 13X20 CE515 C ELECTRO CEXF1A102V 1 10V RSS 1000MF 10X16 TP CE703 C ELECTRO CEXF1C221V 5 16V RSS 220MF 8X11 5 TP CE507 CE511 CE512 CE513 CE517 C ELECTRO CEXF1E10...

Page 23: ...6258800 1 2P S2B XH A CW101 CONN WAFER 9CD6259300 1 52807 1610 CW501 CONN WAFER 9CD6259600 1 2503 WS 2P CW502 CONN WAFER 9736407900 1 52084 1010 10P BOTTOM CW402 CONN WAFER 9736408300 1 52492 1920 19P...

Page 24: ...R523 R526 R531 R532 R533 R538 R539 R557 R558 R619 R620 R CARBON FILM RD AZ124J 1 1 6 120K OHM J R513 R CARBON FILM RD AZ151J 3 1 6 150 OHM J R302 R313 R323 R CARBON FILM RD AZ152J 7 1 6 1 5K OHM J R31...

Page 25: ...SW ENCORDER 5SH162401 1 EC16B24204 24P W DETENT VR701 Parts Name Parts Code Q ty Description Location SW TACT 5S50101001 29 KPT 1105A 1C 1P SW701 SW703 SW704 SW705 SW706 SW707 SW708 SW709 SW710 SW711...

Page 26: ...11 CE512 CE513 CE517 C ELECTRO CEXF1E101V 14 25V RSS 100MF 6 3X11 TP CE201 CE214 CE251 CE307 CE315 CE506 CE508 CE509 CE510 CE514 CE516 CE524 CE602 CE704 C ELECTRO CEXF1E102V 1 25V RSS 1000MF 13X20 TP...

Page 27: ...NN WAFER 9736407900 1 52084 1010 10P BOTTOM CW402 CONN WAFER 9736408300 1 52492 1920 19P BOTTOM CW508 CONN WAFER 9736408400 1 52045 1945 19P CW508 CORD AC 9736900200 1 KKP419C KLCE 2F 0 75SQURE AC901...

Page 28: ...58 R619 R620 R CARBON FILM RD AZ124J 3 1 6 120K OHM J R513 R535 R536 R CARBON FILM RD AZ151J 3 1 6 150 OHM J R302 R313 R323 R CARBON FILM RD AZ152J 7 1 6 1 5K OHM J R310 R321 R609 R610 R718 R719 R720...

Page 29: ...16B24204 24P W DETENT VR701 SW TACT 5S50101001 29 KPT 1105A 1C 1P SW701 SW703 SW704 SW705 SW706 SW707 SW708 SW709 SW710 SW711 SW712 SW713 SW714 SW715 SW716 SW717 SW718 SW720 SW721 SW722 SW723 SW724 SW...

Reviews: