Daewoo AKF-0275 Series Service Manual Download

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Service Manual

Car Audio Basic, RDS & OIRT Band

S/M No:AKF0275EF0

MODEL : AKF-0275 Series

AKF-0285 Series

DAEWOO ELECTRONICS CO., LTD

http://svc.dwe.co.kr

Jan. 2000

4-Channel High Power (35W x 4Ch)
Electronic Tuning
Electronic Volume /Bass /Treble /Balance /Fader Controls
Auto Memory/Preset Scan
Repeat/Random/Intro Scan
Local/DX Switch
Loudness

& Mute Controls

Flip-Down Detachable Face for Anti-Theft

Summary of Contents for AKF-0275 Series

Page 1: ...5 Series DAEWOO ELECTRONICS CO LTD http svc dwe co kr Jan 2000 4 Channel High Power 35W x 4Ch Electronic Tuning Electronic Volume Bass Treble Balance Fader Controls Auto Memory Preset Scan Repeat Random Intro Scan Local DX Switch Loudness Mute Controls Flip Down Detachable Face for Anti Theft ...

Page 2: ...TS 5 4 SCHEMATIC DIAGRAM 10 5 PARTS LOCATION ON P C BOARD 13 6 OVERALL EXPLODED VIEW PARTS LIST 15 7 DECK MECHANISM EXPLODED VIEW PARTS LIST 17 8 PARTS LIST 20 9 FUNCTION OF MICOM IC 22 10 IC BLOCK DIAGRAM 28 11 LIQUID CRYSTAL DISPLAY 32 12 OUTPUT CONNECTION DESCRIPTIONS 34 ...

Page 3: ...n Less than 10 at 12 watts Frequency response 100Hz 3dB 10kHz 5 3dB TAPE SECTION Track format 2 track 2 channel system Tape speed 4 75cm sec Wow Flutter 0 35 max WRMS Signal to Noise ratio More than 50dB Channel Separation More than 35dB Frequency response normal LH tape 63Hz to 10kHz 3dB TUNER SECTION FM Tuning range 87 5 to 108MHz 87 5 to 107 9 at U S A Usable Sensitivity MONO 10dBu 4uV 75ohms S...

Page 4: ...2 LINE DRAWING WITHOUT RDS FUNCTION BASIC WITH RDS FUNCTION RDS 2 1 AKF 0275 FRONT SIDE 2 ...

Page 5: ...LINE DRAWING 2 2 AKF 0285 FRONT SIDE 3 WITHOUT RDS FUNCTION BASIC WITH RDS FUNCTION RDS ...

Page 6: ...LINE DRAWING 4 2 3 AKF 0275 AKF 0285 REAR SIDE ...

Page 7: ...3 ADJUSTMENTS 5 3 1 CONNECTIONS EQUIPMENTS ...

Page 8: ...ADJUSTMENTS 3 2 ADJUSTMENT LOCATIONS IN TUNER MODULES 6 ...

Page 9: ...ig 8 Adjust AM RF1 and AM RF2 for maximum output Fig 8 Adjust LW OSC for 1 2 1 35V VT Fig 8 Adjust LW RF1 and LW RF2 for maximum output Fig 8 RF Tracking LW Band Covering LW Tracking 2 3 4 5 DESCRIPTION CONNECTION ANTENNA SIGNAL DIAL CONTROL ADJUSTMENT 1 Dummy Antenna Circuit 2 Location of Adjustment Points Refer to Adjustment Location Page 3 Control Setting Power Switch ON Balance Fader Control M...

Page 10: ...V 0 03V Fig 8 Adjust RV 101 Tuner PC Board for2 7V 20mV at TP102 IC401 pin 66 Adjust MPX SEP Fig 8 for maximum separation Left and Right ch Adjust Stereo Blend Fig 8 1dB separation between Left and Right ch Stereo Separation SNC 4 5 6 DESCRIPTION CONNECTION ANTENNA SIGNAL DIAL CONTROL ADJUSTMENT 1 Dummy Antenna Circuit 2 Location of Adjustment Points Refer to Adjustment Location Page 3 Control Set...

Page 11: ...r Signal Generator with readings in EMF Open type add 12dB 6dB for the Dummy and 6dB for EMF reading 2 For Signal Generator with reading in dBm add 6 dB for Dummy STEP 1 Head azimuth adjustment Tape Speed Figure 6 Figure 6 MTT 144N or equivalent MTT 144N or equivalent Speaker Output Speaker Output Head azimuth adjustment screw Turn the azimuth screw to obtain maximum level Adjust for 3010 3020Hz T...

Page 12: ...4 SCHEMATIC DIAGRAM 4 1 BASIC Series AKF 0275 0285 10 Size A3 ...

Page 13: ...SCHEMATIC DIAGRAM 11 4 2 RDS Series AKF 0275 0285 Size A3 ...

Page 14: ...SCHEMATIC DIAGRAM 12 4 3 OIRT Band AKF 0275 0285 Size A3 ...

Page 15: ...5 PARTS LOCATION ON P C BOARD PCB MAIN AKF 0275 0285 Series PARTS SIDE 13 ...

Page 16: ...PARTS LOCATION ON P C BOARD BOTTOM SIDE 14 ...

Page 17: ...6 OVERALL EXPLODED VIEW PARTS LIST 15 6 1 AKF 0275 BASIC RDS Size A3 ...

Page 18: ...OVERALL EXPLODED VIEW PARTS LIST 16 6 2 AKF 0285 BASIC RDS Size A3 ...

Page 19: ...7 DECK MECHANISM EXPLODED VIEW PARTS LIST EXPLODED VIEW 17 ...

Page 20: ...ARM TAPE CATCH B SPRING TAPE CATCH ARM PULLEY IDLE SPRING TU ARM GEAR TU REEL SPINDLE FELT REEL GEAR REEL SPRING REEL WASHER REEL BUSHING REEL SPRING REEL CAP CAP REEL ARM DETECT GEAR GEAR DETECT DESCRIPTION ADM 22 FULL LOGIC DECK ADM 22 FULL LOGIC DECK SUS 304 1 2H T0 4 EGSAFC45R T0 8 EGSAFC45R T0 8 EGSAFC45R T0 8 HEAD FPC ET T0 2 ADM 22 FULL LOGIC DECK SWP B PI0 65 TORS ADM 22 FULL LOGIC DECK SW...

Page 21: ...HOLDER HOOK TAPE HANGER CASSETTE BRACKET PCB PCB EQ AS STOPPER REV PLT B SCREW MACHINE SCREW TAPTITE SCREW TAPTITE SCREW TAPTITE SCREW TAPTITE SCREW TAPTITE POLYSLIDER WASHER POLYSLIDER WASHER POLYSLIDER WASHER POLYSLIDER WASHER POLYSLIDER WASHER DESCRIPTION ALS T0 05 PI15 8 SWP B PI0 4 AWP B PI0 4 EXTN EGSAFC45R T0 8 SMF5030 SUS 304WPB PI0 25 EXTN SUS 304WPB PI0 25 EXTN POM DURACON M90 44 BK GNP ...

Page 22: ...RIPTION SAA6579T RDS VERSION BA3121 When it is CD Changer LC75372E HA13158A 1 LC72366 9572 RDS VERSION 2 LC72362 9544 W O RDS BASIC VERSION 3 LC72362 9904 PMS ONLY in GREECE 24LC16B 1 SN ANT J 020 03 LT6339 S4 RED 14V 40MA D3 0 GN COLOR 37X1X5 2 300UH EI 19MM H500K 5X5 6N PC BS 500K OHM CAT 6 NC FM MW CAT 7 NC FM MW LW CAT 8 NC FM OIRT MW KCC 516V FM ONLY at PMS in GREECE CET 6048 FM OIRT MW LW 4 ...

Page 23: ... 315 Q305 Q403 404 Ref DESCRIPTIONS PART NO LCD DISPLAY SW CHIP SW TACT LED CONNECTOR WAFER CONNECTOR LAMP PILOT CAP LAMP DIODE CHIP LCD DRIVER 97T0L1400P 97T0L1560P 5S52643CL1 5S50101Z02 DLT4H11G41 97T6220100 97T6220400 97T82L0WE4 97T0420550 D1MN10 B 1LC75852 1LC75854E 1HL14104 DESCRIPTION TTD 3093UPTDPN PO W O RDS IS09035P W RDS VERSION 1C 1P SKMA 10918A 260G 1C 1P SKQC10918B 260G LT4H11G 41 RED...

Page 24: ...9 FUNCTION OF MICOM IC 22 9 1 PIN CONFIGURATION ...

Page 25: ...Outputs the pll lock up signal to lock up the pll frequency in high speed FM IF COUNT INPUT INPUT RANGE 10 7MHz 30kHz Vpp 0 07 1 5Vrms AM IF COUNT INPUT INPUT RANGE 450kHz 1kHz AM 450kHz 0 37kHz LW Vpp 0 07 1 5Vrms To check if the memory state is normal on the back up mode The application circuit is illustrated on the note of back pages To check if it is back up mode LOW or normal operation state ...

Page 26: ...IX INPUT OPTION DIODE MATRIX OUTPUT SECURITY MEMORY EEPROM CONTROL PORT REMOCON INPUT PORT LCD BACK LIGHTING COLOR CONTROL PORT RESET COLOR LOW TWO KEY IN COLOR CHANGE DECK EQ IC MUTE ADJUST PORT PE3 SI2 PE2 SO2 PE1 SCK2 PE0 PC1 PO0 PO2 PO1 PA3 PA2 PA1 PA0 PB3 PB2 PB1 PB0 PF3 PF2 PF1 PF3 ADI3 PP1 DESCRIPTION I O O O I O O O O O O O I I I I O O O O I O O I O MTR_ON MTR_FF PLAY HIGH LOW FF REW HIGH ...

Page 27: ... MATRIX DESCRIPTIONS SOURCE RETURN ODR 3 PA3 27PIN DOUBLE 2 D410 ODST 3 PB3 23PIN ODST 2 PB2 24PIN ODST 1 PB1 25PIN ODST 0 PB0 26PIN LOUD LOC D407 TUNER 1 2 D408 AREA 2 D409 LW ENABLE D404 AREA 3 D406 CDC AUX IN D401 DOUBLE 1 D402 CLOCK D411 AREA 1 D412 ODR 2 PA2 28PIN ODR 1 PA1 29PIN ODR 0 PA0 30PIN LW select D404 0 LW BAND DISABLE 1 LW BAND ENABLE CLOCK USE select D411 0 CLOCK ENABLE 1 CLOCK DIS...

Page 28: ...CRIPTIONS SOURCE RETURN ODR 3 PA3 27PIN DOUBLE 2 D410 ODST 3 PB3 23PIN ODST 2 PB2 24PIN ODST 1 PB1 25PIN ODST 0 PB0 26PIN TUNER 1 2 D408 AREA 2 D409 LW ENABLE D404 AREA 3 D406 CDC AUX IN D401 DOUBLE 1 D402 CLOCK D411 AREA 1 D412 ODR 2 PA2 28PIN ODR 1 PA1 29PIN ODR 0 PA0 30PIN LW select D404 0 LW BAND DISABLE 1 LW BAND ENABLE CLOCK USE select D411 0 CLOCK ENABLE 1 CLOCK DISABLE LOUD LOC USE select ...

Page 29: ...FUNCTION OF MICOM IC 27 DIODE AREA AREA1 D407 AREA2 D410 AREA3 D413 EUROPE CHINA USA1 USA2 Australia Middle East OIRT 1 0 0 1 0 0 1 0 0 0 1 1 1 1 0 0 0 1 AREA 1 2 3 W O RDS Ver ...

Page 30: ...10 IC BLOCK DIAGRAM 28 10 1 LC75854 LC75852 IC LCD DRIVER IC501 ...

Page 31: ...IC BLOCK DIAGRAM 29 10 2 LB1641 DRIVER IC301 10 3 SAA6579T IC AUDIO IC101 ...

Page 32: ...IC BLOCK DIAGRAM 30 10 4 HA13158A IC AUDIO POWER IC305 10 5 24LC16B IC EEPROM IC402 ...

Page 33: ...IC BLOCK DIAGRAM 31 10 6 BA3121 IC ISOLATOR IC302 ...

Page 34: ... 1C 2A VOL 3C 3E 4F 4E 4D 4H 5F 2 3 4 5 6 7 8 9 10 13 14 15 16 17 IC NO LCD NO COM1 COM2 18 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 5G 5C 5B 6A 6G 6C 6B 7A 7F 7G 7C 7B 8A 8G 8C 8B 5E 5D 5H 6F 6E 6D 6H 7E 7D P 8F 8E 8D 19 20 21 22 23 24 25 26 27 28 29 30 31 32 IC NO LCD NO COM1 COM2 33 31 32 33 34 35 36 37 38 39 40 9A 9G 9C 9B CH INT TAPE IN AMS DOLBY COM1 9F 9E 9D CH RPT MTL COM2 34 35 36 37 ...

Page 35: ...ISC 6D 4 5 7 39 38 37 36 35 34 33 30 34 32 29 IC NO LCD NO COM1 COM2 COM3 COM4 13 31 32 33 34 35 36 37 38 39 40 2H 2A 1D LOC LOUD COM1 2G 2O 2F 1C 1E MO COM2 2K 2L 2N 1G 1F CH COM3 2D 2M 2E 1B 1A AUT COM4 12 11 10 9 8 40 41 42 43 IC NO LCD NO COM1 COM2 COM3 COM4 28 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 6A PTY 5B 5H 5A 4B 4H 4A 3B 3H 3A TA 2B 6O 6F 5I 5G 5O 5F 4I 4G 4O 4F 3I 3G 3O 3F 2I 6L 6...

Page 36: ...BLUE PINK RED 3 4 5 6 7 8 9 11 13 14 15 16 17 18 19 NOTE The red cable must be connected via the car s ignition lock to prevent unwanted discharge of the car battery if it is not used for longer periods of time NOTE If wiring connection are made wrong the unit will not operate properly and it could be damaged B 4 SPEAKERS 1 Violet Rear Right 2 Violet Black Rear Right 3 Gray Front Right 4 Gray Blac...

Page 37: ...ght 2 violet black rear right 3 gray front right 4 gray black front right 5 white front left 6 white black front left 7 green rear left 8 green black rear left C OTHERS 5 black ground 6 orange 12v preamp 8 red preamp R ch 10 white preamp L ch A B C 8PIN CONNECTOR 1 CDC ON BACK UP B NO CONNECTION DATA GROUND R CH L CH SIGNAL GROUND 2 3 4 5 6 7 8 ...

Page 38: ...WOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail G7F00E web dwe co kr TEL 82 2 360 7799 FAX 82 2 360 7877 edited by Mc Cem ...

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