Daewoo AKF-8825 series Service Manual Download Page 1

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Service Manual

Car Audio Basic, RDS

S/M No : AKF8825EF0

MODEL : AKF-3825 Series

AKF-8825 Series

DAEWOO ELECTRONICS CO., LTD

http://svc.dwe.co.kr Apr. 2000

PARTIAL DETACHABLE
LOW POWER (7W x 2 or 4CH)
REMOTE CONTROL
AUTO STOP or REVERSE DECK MECHANISM
ELECTRONIC VOLUME CONTROL
LOUDNESS
LOCAL / DX

Summary of Contents for AKF-8825 series

Page 1: ...o AKF8825EF0 MODEL AKF 3825 Series AKF 8825 Series DAEWOO ELECTRONICS CO LTD http svc dwe co kr Apr 2000 PARTIAL DETACHABLE LOW POWER 7W x 2 or 4CH REMOTE CONTROL AUTO STOP or REVERSE DECK MECHANISM ELECTRONIC VOLUME CONTROL LOUDNESS LOCAL DX ...

Page 2: ... 4 4 ADJUSTMENTS 7 5 SCHEMATIC DIAGRAM 12 6 PARTS LOCATION ON P C BOARD 15 7 OVERALL EXPLODED VIEW PARTS LIST 19 8 DECK MECHANISM EXPLODED VIEW PARTS LIST 21 9 PARTS LIST 27 10 FUNCTION OF MICOM IC 31 11 IC BLOCK DIAGRAM 37 12 LIQUID CRYSTAL DISPLAY 42 13 OUTPUT CONNECTION DESCRIPTIONS 43 ...

Page 3: ...sponse normal LH tape 63Hz to 10kHz TUNER SECTION FM Tuning range 87 5 to 108MHz 87 5 to 107 9 at U S A Usable Sensitivity MONO 12dBuV 4uV 75ohms Signal to noise ratio at 60dBu More than 50dB MW Tuning range 522 to 1620kHz at Europe 530 to 1710kHz at U S A Usable Sensitivity 30dBuV GENERAL Power requirements DC 12 0V Rated 14 4V Usable 10 8 15 6V Negative ground Current consumption 3A Maximum Dime...

Page 4: ...e control Auto stop deck mechanism Electronic volume control Loudness Local DX Partial detachable 2 x 7W Remote control Auto reverse Electronic volume control Loudness Local DX Partial detachable 4 x 7W RDS AF PTY EON TA Auto reverse deck mechanism Remote control Electronic volume control Loudness Local DX ...

Page 5: ...3 LINE DRAWING 2 2 REAR SIDE ...

Page 6: ...Change Regulator IC and check output voltage Yes No LCD or LED is inferior goods Change LCD or LED to superior goods Yes Different each channel have output level Front Rear Left Right Treble or Bass is low unusually Yes No Yes Balance of front and rear is in one side Balance of Left Right is in one side Re adjust Balance of front rear Ref Balance Center Front 00 Rear 00 Ref Balance Center Left 00 ...

Page 7: ...er regions are not held Yes Yes No selected the local stations Ref Point or Extreme noise in broadcast Weak separation of FM stereo Yes No Yes Antenna connector is missing Put exactly antenna connector in his jack Ref CAT 8 KCC 654V Electrical Parts List Function of auto switch noise reduction Ref Yes Weak frequency area of FM AM Switch automatically to mono mode in weak frequency area Yes B R1 In...

Page 8: ...s Yes A A Sound is low or not clear Yes Yes Head is dirty Ref Point Clean head or pinch roller with cleaner Tape is not inserted into the slot Some program is played back repeatedly Yes No Yes Tape was inserted right side left Tape is ejected after being inserted Insert recording part to right side Ref Tape Deck Macha TN 715 TN 301 Ref Tape is cut or extended Ref Check on L C D and press RPT butto...

Page 9: ...4 ADJUSTMENTS 7 4 1 EQUIPMENTS CONNECTIONS ...

Page 10: ...ADJUSTMENTS 4 2 TUNER MODULE ADJUSTMENT LOCATIONS 8 ...

Page 11: ...2 for maximum output Fig 7 Adjust AM RF1 and AM RF2 for maximum output Fig 7 RF Tracking 2 3 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 Mech Center Band Switch AM Treble Bass Control Mech Center Other OFF 4 Adjustment Procedure NOTE Wh...

Page 12: ... separation between Left and Right ch SNC 2 3 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 Mech Center Band Switch FM Treble Bass Control Mech Center Other OFF 4 Adjustment Procedure Note dBu uV dBu uV 17 5 0 33 44 6 16 6 31 35 56 2 30 3...

Page 13: ...ter position Volume adjusted to 2Volts STEP 1 Head azimuth adjustment Tape Speed Figure 6 Figure 6 MTT 114N or equivalent MTT 114N or equivalent Speaker Output Speaker Output Head azimuth adjustment screw Turn the azimuth screw to obtain maximum level Adjust for 3010 3020Hz Tape Speed adjustment 2 DESCRIPTION TEST TAPE CONNECTION TEST POINT ADJUSTMENT POINT ADJUSTMENT ...

Page 14: ...12 5 SCHEMATIC DIAGRAMS 5 1 BASIC Series AKF 3825 Size A3 ...

Page 15: ...13 5 2 BASIC Series AKF 8825 SCHEMATIC DIAGRAM Size A3 ...

Page 16: ...14 5 3 RDS Series AKF 8825R SCHEMATIC DIAGRAM Size A3 ...

Page 17: ...PART SIDE 6 1 PCB MAIN 15 6 PARTS LOCATION ON P C BOARD AKF 3825 AKF 8825 Basic RDS ...

Page 18: ...PARTS LOCATION ON P C BOARD 16 BOTTOM SIDE ...

Page 19: ...6 2 PCB FRONT 17 PARTS LOCATION ON P C BOARD PART SIDE BOTTOM SIDE ...

Page 20: ...18 PARTS LOCATION ON P C BOARD 6 3 ISO PCB ...

Page 21: ...19 7 OVERALL EXPLODED VIEW PARTS LIST 7 1 AKF 3825 Basic Size A3 ...

Page 22: ...7 2 AKF 8825 Basic RDS 20 OVERALL EXPLODED VIEW PARTS LIST Size A3 ...

Page 23: ...8 1 EXPLODED VIEW TN 301NX 219 for AKF 3825 21 8 DECK MECHANISM EXPLODED VIEW PARTS LIST ...

Page 24: ...5 x 0 4 HL WASHER CUT 1 5 x 3 2 x 0 5 MOTOR PULLEY MAIN BELT MOTOR EG 530AD 2F SCREW 2 6 x 3 BRAKE SHOE CASSETTE CASE KICK PLATE CASSETTE HOLD SPRING PLATE KICK PLATE SPRING 1831 01 511 9690 00 00 1831 02 07 1831 02 511 1831 02 03 9085 00 00 9007 00 00 1831 02 06 9825 00 00 9316 00 00 1821 12 96 1831 03 311 1831 03 06 1831 04 304 9999 03 07 1831 05 301 9882 00 00 9999 70 10 1831 06 01 1831 06 02 6...

Page 25: ... FUNCTION LEVER SPRING PUSH PLATE LIFT UP LEVER REVERS SPRING FUNCTION LEVER FF LOCK LEVER LOCK LEVER SPRING HL WASHER 2 1 x 5 x 0 3 1831 08 511 1831 08 02 1831 08 03A 1831 08 10 1831 08 05 1831 08 06 9W02 35 010 6401 01 207 1831 09 07 1831 09 10 1831 09 08 1831 09 12 1831 09 11 1831 09 05 1831 09 06 9999 60 04 PART NO Q TY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 38 39 40 41 42 43 44 45 46 47 48 49 50 51 ...

Page 26: ...24 DECK MECHANISM EXPLODED VIEW PARTS LIST 8 3 EXPLODED VIEW TN 715 DH 109 for AKF 8825 Series ...

Page 27: ...ET ASS Y MAIN PLATE H S SPRING MOTOR ASS Y EG 520 ED 3BB FL PULLEY FL CAPSTAN ASS Y FL PLATE TA SPRING TRIGGER ARM H P PUSH ARM B H P ROLLER 1960 01 501 1960 03 303 1960 03 402 1960 03 02 1960 03 03 1960 04 301 1960 04 302 1960 06 312 1960 08 06 1960 08 08 1960 08 09 1960 08 07 1960 08 301 1960 09 03 1960 09 502 1960 10 01 1960 10 02 1960 11 1960 13 01 1960 13 301 1960 13 09 1960 14 02 1960 14 01 ...

Page 28: ...55 x 3 8 x 0 13 LUMILAR WASHER CUT 1 25 x 3 2 x 0 5 HIMELON WASHER 1 55 x 3 x 0 2 HINELON WASHER CUT 1 2 x 3 x 0 25 P WASHER CUT 0 85 x 2 8 x 0 25 1960 14 06 1960 14 14 1960 14 12 1940 14 123 1940 14 115 1940 14 17 1960 15 311 1960 15 04 1960 15 05 6405 01 36 6405 04 02 9F27 20 401 9P12 20 051 9C04 20 303 9C42 20 201 9C02 26 452 9P02 20 031 9C39 20 801 9P12 20 071 9W05 13 100 9W08 50 060 9W05 20 0...

Page 29: ...TR TR DIODE RECTIFER CHIP DIODE CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP DESCRIPTION DSQ706 P 2P B 70 SOLDER 5 5V 0 047F 10 5 x 9 5 5T E3P 80 3P S SH IMSA 9890B 14B T IMSA 9610S 06A E4P 180 4P S LA 3161 TDA7365 ISO 8 0MM EI 19MM 2 2MH LEAD SMALL CAT 8 NC 4 5MHZ 12PF 49 S S TAPING DSP 301N S00B AUTO 26MM MTZJ 3R0B 26MM 2SD1862R AUTO 2SB124...

Page 30: ... B DZ02W6R2VB DZ02W5R1VB DZ02W9R1VB 12BS9929U1 1LC75371M 97T0L1530N 5S52343MA1 5S50101Z02 DHSMDS670A DIODE CHIP ZENER TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP DIODE CHIP ZENER DIODE CHIP ZENER DIODE CHIP ZENER IC CHIP CUSTOM IC CHIP EVR LCD SW LEAF SW TACT LED CHIP Z02W 10V Y KTA1504Y SOT 23 ASY KRC111S KRC102S KRC102S KRC102S KRC102S Z02W 6 2V Z02W 5 1V Z02W 9 1V LC72366 9929 LC75371M MFP3...

Page 31: ...HIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP TR CHIP DESCRIPTION DSQ706 P 2P B 70 SOLDER 5 5V 0 047F 10 5 x 9 5 5T AWG28 4P 95MM IMSA 9890B 14B T IMSA 9610S 06A E5P 100 5P S LA 3161 TDA7372B ISO 8 0MM 37X1X5 2 300UH P EI 19MM H500K 5X5 6N PC BS KCC 654B 0 22UH K 02 TA 26MM 2SD1862R AUTO 2SB1240R 2SD1862R AUTO 2SB1240R 2SD1862R AUTO 2SD1862R AUTO 2SD1862R AUTO...

Page 32: ...DIODE CHIP ZENER DIODE CHIP ZENER DIODE CHIP ZENER DIODE CHIP ZENER IC CHIP DECODER IC CHIP CUSTOM IC CHIP EEPROM IC CHIP EVR CONNECTOR LCD LED SW LEAF SW TACT LED CHIP TR CHIP TR CHIP IC CHIP DRIVER CONN AS CONN DECK MECHANISM Z02W 10V Y Z02W 6 2V Z02W 5 1V Z02W 9 1V LC72722M LC72366 9929 24LC16B I SN LC75371M MFP36S IMSA 9890S 14H T AT4231APT LT4H11G 41 RED SPPW81 6 55 B2 1C 1P SKQC10918B 260G H...

Page 33: ...31 10 FUNCTION OF MICOM IC 10 1 PIN CONFIGURATION TOP VIEW ...

Page 34: ...MINAL OF FM IF COUNT INPUT RANGE 10 7MHz 30kHz Vpp 0 07 1 5Vrms INPUT TERMINAL OF AM IF COUNT INPUT RANGE 450kHz 1kHz AM 450kHz 0 37kHz LW Vpp 0 07 1 5Vrms PART THAT CHECKS DAMAGE OF BACK UP MEMORY AFTER COMING BACK TO BACK UP MODE REFER TO ATTACHED PAGE ABOUT CIRCUIT USED CONTROL TERMINAL OF BACK UP MODE IF INPUT IS HIGH WORKING IS NORMAL IF INPUT IS LOW IT REVERTS TO BACK UP MODE IF INPUT OF ACC...

Page 35: ...SPLAYED SIGNAL DETECTION PORT STARTING INPUT IS HIGH INPUT IS CHANGED INTO LOW WHEN RECEIVING THE RADIO FREQUENCY MUTING WHEN CHECKING AF IN RADIO MODE LOW IN ACTIVE HIGH AND OTHERS MODES INPUT TERMINAL OF USING TELEPHONE SIGNAL STARTING IS HIGH MUTING IF ACTIVE BECOMES LOCAL MODE HIGH DX MODE LOW STARTING IS LOW USED RADIO MODE ONLY STARTING OUTPUT IS LOW MONO MODE LOW STEREO MODE HIGH SIGNAL MET...

Page 36: ... PORT PIN OUTPUT IS LOW EXCEPT SCAN OUT CD C DISPLAY DATA INPUT PORT CD C CONTROL DATA OUTPUT PORT CD C MODE ON OUTPUT PORT CD C PLAY MODE HIGH AND OUTPUT IS LOW IN STARTING AND OTHERS CONDITIONS PANEL IN LOW PANEL OUT LOW WARNING LED OUTPUT PORT PL1 PL2 PL3 PM0 PF0 PM2 PD1 PC3 PC2 PC1 PD2 DESCRIPTION I O O O O O O O O I O O I I O I I O I O O O O 11 12 13 14 LCD DRIVER IC INTERFACE PORTS PE3 PE2 P...

Page 37: ...N NAME PG2 PG1 PG0 PA3 PA2 PA1 PA0 EVR IC INTERFACE PORTS OPTION DIODE MATRIX INPUT MULTI PATH INPUT PORT ACTIVE HIGH EEPROM CONTROL PORT FOR RDS DATA MEMORY OPTION DIODE MATRIX OUTPUT PB3 PB2 PB1 PB0 PI1 ADI5 PG3 PF3 PF2 PF1 DESCRIPTION I O O O O I I I I O O O O I I I O O ...

Page 38: ...LOCK 24HOUR US 1 CLOCK 12HOUR US 2 CLOCK 12HOUR US 3 CLOCK 12HOUR Austrailia Middle East CLOCK 12HOUR Cectral South America CLOCK 12HOUR FM MW LW FM AM FM AM FM AM FM AM FM AM BAND Receiving Frequency MHz Channel Space KHz Reference Frequency KHz Intermediate Frequency FM MHz MW LW KHz 87 5 108 0 522 1620 144 288 87 5 108 0 530 1620 87 5 107 9 530 1710 87 5 107 9 530 1620 87 5 108 0 531 1602 87 5 ...

Page 39: ...37 11 IC BLOCK DIAGRAM 11 1 LC75854 IC LCD DRIVER ...

Page 40: ...38 IC BLOCK DIAGRAM 11 2 TDA7372B Audio Power IC IC502 ...

Page 41: ...IC BLOCK DIAGRAM 39 11 3 TDA7365 Audio Power IC IC502 ...

Page 42: ...IC BLOCK DIAGRAM 40 11 4 LC75371M IC EVR IC501 ...

Page 43: ...IC BLOCK DIAGRAM 41 11 5 LC7270M LC72722 RDS IC201 ...

Page 44: ...D PTY 7B 7I 7C 27 3F 3N 3E SHF 7H 7G 7K 7D 28 AMS 2B 2I 2C 7A 7O 7L 7M 29 2H 2G 2K 2D 7F 7N 7E 30 2A 2O 2L 2M REG 6B 6I 6C 31 2F 2N 2E MTL 6H 6G 6K 6D 32 AF 1B 1I 1C 6A 6O 6L 6M 33 1H 1G 1K 1D 6F 6N 6E LD 34 1A 1O 1L 1M TP 5B 5I 5C 35 1F 1N 1E 5H 5G 5K 5D 36 5A 5O 5L 5M 37 COM1 5F 5N 5E LOC 38 39 COM2 COM3 COM4 MO 4B 4I 4C 4O 8B 8I 8C 22 4A 4O 4L 4M D R T 21 4H 4G 4K 4D COM2 COM3 COM4 COM1 COM2 CO...

Page 45: ... CH L CH SIGNAL GROUND Only for sets which have a CDC option 2 3 4 5 6 7 8 1 Telephone Mute Active Low 4 Back up DC 12V 5 Remote DC 12V power ant 6 Dimmer 7 ACC power supply 8 Ground 1 Rear right 2 Rear right 3 Front right 4 Front right 5 Front left 6 Front left 7 Rear left 8 Rear left REMOCON C5 L0 C6 N2 C7 L1 C8 N0 C9 L2 C10 N1 A B C ...

Page 46: ...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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