Daewoo AKF-8825 series Service Manual
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Daewoo AKF-8825 series Service Manual

Car audio basics, rds
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Service Manual
Car Audio Basic, RDS
MODEL : AKF-3825 Series
AKF-8825 Series
PARTIAL DETACHABLE
LOW POWER (7W x 2 or 4CH)
REMOTE CONTROL
AUTO STOP or REVERSE DECK MECHANISM
ELECTRONIC VOLUME CONTROL
LOUDNESS
LOCAL / DX
DAEWOO ELECTRONICS CO., LTD
http://svc.dwe.co.kr
S/M No : AKF8825EF0
Apr. 2000

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  • Page 1 Car Audio Basic, RDS MODEL : AKF-3825 Series AKF-8825 Series PARTIAL DETACHABLE LOW POWER (7W x 2 or 4CH) REMOTE CONTROL AUTO STOP or REVERSE DECK MECHANISM ELECTRONIC VOLUME CONTROL LOUDNESS LOCAL / DX DAEWOO ELECTRONICS CO., LTD http://svc.dwe.co.kr Apr. 2000...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. PRODUCT SPECIFICATIONS ..........1 2. LINE DRAWING ................2 3. EMERGENCY TROUBLE SHOOT ..........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.

  • Page 3: Product Specifications

    1. PRODUCT SPECIFICATIONS AUDIO SECTION Maximum output power : 7watts per channel into 4 ohms. Load impedance : 4 ohms Total harmonic distortion : Less than 10% at 5 watts : 100Hz( + 3dB), 10kHz(-5 + 3dB) Frequency response : 10 + 3dB at 100Hz/10kHz Control Bass/Treble TAPE SECTION Track format...

  • Page 4: Line Drawing

    2. LINE DRAWING 2-1. FRONT SIDE AKF-3825 BASIC - Partial detachable - 2 x 7W - Remote control - Auto stop deck mechanism - Electronic volume control - Loudness - Local / DX AKF-8825 BASIC - Partial detachable - 2 x 7W - Remote control - Auto reverse - Electronic volume control...
  • Page 5 LINE DRAWING 2-2. REAR SIDE...

  • Page 6: Emergency Trouble Shoot

    3. EMERGENCY TROUBLE SHOOT 3-1. General Function Put exactly output Output connector No sound from connector in. is missing speakers Change output Output connector connector to is inferior goods superior goods Change Power IC, Power IC, Output Output Socket to Socket is inferior superior goods goods...
  • Page 7 EMERGENCY TROUBLE SHOOT 3-2. Tuner Function Select exactly No selected the broadcasting Hearing noise station frequency. only Ref. CAT-8, KCC-654V Change tuner Tuner Module is Electrical Parts List module to inferior goods. superior goods. Weak frequency Change to goods of Extreme noise area caused by R.D.S function.
  • Page 8 EMERGENCY TROUBLE SHOOT 3-3. Tape Function Use only superior Tape is inferior No sound from goods goods speakers Put exactly deck No signal play output connector output Ref. Tape Deck Macha Change Deck Deck Mechanism Mechanism to TN-715, TN-301 is inferior goods. superior goods.

  • Page 9: Adjustments

    4. ADJUSTMENTS 4-1. EQUIPMENTS CONNECTIONS...
  • Page 10 ADJUSTMENTS 4-2. TUNER MODULE ADJUSTMENT LOCATIONS...
  • Page 11 ADJUSTMENTS 4-3. AM (MW/LW) ADJUSTMENT METHOD 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 .......
  • Page 12 ADJUSTMENTS 4-4. FM ADJUSTMENT METHOD 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 .......
  • Page 13 ADJUSTMENTS 4-5. TAPE ADJUSTMENT METHOD NOTE : 1. Clean the playback head before adjustment 2. Prepare the test tape MTT-114 or equivalent 3. Balance, Fader, Bass & Treble ..Center position. Volume adjusted to 2Volts. TEST ADJUSTMENT STEP DESCRIPTION TEST TAPE CONNECTION ADJUSTMENT POINT...

  • Page 14: Schematic Diagram

    Size:A3 5. SCHEMATIC DIAGRAMS 5-1. BASIC Series AKF-3825...
  • Page 15 Size:A3 SCHEMATIC DIAGRAM 5-2. BASIC Series AKF-8825...
  • Page 16 Size:A3 SCHEMATIC DIAGRAM 5-3. RDS Series AKF-8825R...

  • Page 17: Parts Location On P.c.board

    6. PARTS LOCATION ON P.C. BOARD AKF-3825 / AKF-8825 Basic & RDS 6-1. PCB MAIN PART SIDE...
  • Page 18 PARTS LOCATION ON P.C. BOARD BOTTOM SIDE...
  • Page 19 PARTS LOCATION ON P.C. BOARD 6-2. PCB FRONT PART SIDE BOTTOM SIDE...
  • Page 20 PARTS LOCATION ON P.C. BOARD 6-3. ISO PCB...

  • Page 21: Overall Exploded View & Parts List

    Size:A3 7. OVERALL EXPLODED VIEW & PARTS LIST 7-1. AKF-3825 Basic...
  • Page 22 Size:A3 OVERALL EXPLODED VIEW & PARTS LIST 7-2. AKF-8825 Basic & RDS...

  • Page 23: Deck Mechanism Exploded View & Parts List

    8. DECK MECHANISM EXPLODED VIEW & PARTS LIST 8-1. EXPLODED VIEW TN-301NX-219 for AKF-3825...
  • Page 24 TN-301NX-219 DECK MECHANISM EXPLODED VIEW & PARTS LIST 8-2. PARTS LIST for AKF-3825 PART NO. PART NAME Q’TY 1831 01 511 CHASSIS SIDE ASS’xY (X) 9690 00 00 CAMERA S TAPPING SCREW M2 x 3 1831 02 07 HEAD PANEL SPRING 1831 02 511 HEAD PANEL ASS’Y 1831 02 03...
  • Page 25 TN-301NX-219 DECK MECHANISM EXPLODED VIEW & PARTS LIST PART NO. PART NAME Q’TY 1831 08 511 GEAR PLATE ASS’Y 1831 08 02 CAM GEAR 1831 08 03A SENSOR 1831 08 10 G. LOCK LEVER 1831 08 05 G. LOCK LEVER SPRING 1831 08 06 GEAR PLATE SPRING 9W02 35 010...

  • Page 26: Exploded View

    DECK MECHANISM EXPLODED VIEW & PARTS LIST 8-3. EXPLODED VIEW TN-715 DH-109 for AKF-8825 Series...
  • Page 27 DECK MECHANISM EXPLODED VIEW & PARTS LIST TN-715 DH-109 8-4. PARTS LIST for AKF-8825 Series PART NO. DESCRIPTION Q’TY 1960-01-501 CHASSIS RIVET ASS’Y P HEAD MS35P-SF005 1960-03-303 HEAD SW ASS’Y (D) 1960-03-402 HEAD PANEL ASS’Y (D) 1960-03-02 P.GEAR METAL 1960-03-03 P.GEAR...
  • Page 28 DECK MECHANISM EXPLODED VIEW & PARTS LIST TN-715 DH-109 PART NO. DESCRIPTION Q’TY 1960-14-06 HP PUSH PLATE 1960-14-14 P.P SPRING 1960-14-12 HP RETURN ARM 41~51 1940-14-123 MAIN GEAR V 1940-14-115 MIDDLE PULLEY 1940-14-17 MAIN BELT 1960-15-311 FR LEVER ASS’Y 1960-15-04 LOCK PLATE 1960-15-05 LOCK PLATE SPRING...

  • Page 29: Parts List

    9. PARTS LIST CAUTION is a recommendable part for essential stock. 9-1. AKF-3825E LOCATION CODE NAME DESCRIPTION BZ01 9TP0Z00200 BUZZER DSQ706-P CNANT 97T8839101 CONN AS 2P(B) 70 SOLDER CS409 CDXF0H473M C SUPER 5.5V 0.047F 10.5 x 9.5 5T CWEQ 97T8861100 CONN AS E3P 80 3P(S)SH CWFR...
  • Page 30 PARTS LIST LOCATION CODE NAME DESCRIPTION HQ402 TKTA1504YB TR CHIP KTA1504Y SOT-23 ASY HQ403 TKRC111S-B TR CHIP KRC111S HQ407 TKRC102S-B TR CHIP KRC102S HQ408 TKRC102S-B TR CHIP KRC102S HQ414 TKRC102S-B TR CHIP KRC102S HQ415 TKRC102S-B TR CHIP KRC102S HZ101 DZ02W10V-B DIODE CHIP ZENER Z02W 10V Y HZ401...
  • Page 31 PARTS LIST 9-2. AKF-8825 LOCATION CODE NAME DESCRIPTION BZ01 9TP0Z00200 BUZZER DSQ706-P CNANT 97T8839101 CONN AS 2P(B) 70 SOLDER CS409 CDXF0H473M C SUPER 5.5V 0.047F 10.5 x 9.5 5T CWEQ 97T8813004 CONN AS AWG28 4P 95MM CWFR 97T6225400 CONNECTOR IMSA-9890B-14B-T CWREM 97T6229506 CONN...
  • Page 32 PARTS LIST LOCATION CODE NAME DESCRIPTION HQ403 TKRC111S-B TR CHIP KRC111S HQ407 TKRC102S-B TR CHIP KRC102S HQ408 TKRC102S-B TR CHIP KRC102S HQ414 TKRC102S-B TR CHIP KRC102S HQ415 TKRC102S-B TR CHIP KRC102S HZ101 DZ02W10V-B DIODE CHIP ZENER Z02W 10V Y HZ401 DZ02W6R2VB DIODE CHIP ZENER Z02W 6.2V...

  • Page 33: Function Of Micom Ic

    10. FUNCTION OF MICOM IC 10-1. PIN CONFIGURATION (TOP VIEW)
  • Page 34 FUNCTION OF MICOM IC 10-2. PIN DESCRIPTION PIN NAME DESCRIPTION Connection to 4.5MHz CRYSTAL XOUT Output compared sith phase IF LOCAL OSCILLATION FREQUENCY IS HIGHER THAN STANDARD FREQUENCY. OUTPUT IS HIGH, IF NOT OUTPUT IS LOW, AND IF SAME OUTPUT IS HIGH-Z.
  • Page 35 FUNCTION OF MICOM IC PIN NAME DESCRIPTION TUNER MUTE PORT. WHEN TUNING, OUTPUT IS HIGH THEN MUTE IS ON. (SEEK, WHEN SD CHECK) AUDIO MUTE PORT, ACTIVE HIGH OUTPUT PORT OF BEEP. PN0/BEEP BEEP COMES OUT AT 2.08, OR 3.75kHz DEPENDING ON OPERATION REQUESTED BAND SELECT PORT IN TUNER MODE.
  • Page 36 FUNCTION OF MICOM IC PIN NAME DESCRIPTION POWER CONTROL PORT. POWER OFF --> LOW, POWER ON --> HIGH REMOCON KEY SOURCE OUTPUT PORT PIN OUTPUT IS LOW EXCEPT SCAN OUT CD-C DISPLAY DATA INPUT PORT INT0 CD-C CONTROL DATA OUTPUT PORT CD-C MODE ON OUTPUT PORT.
  • Page 37 FUNCTION OF MICOM IC PIN NAME DESCRIPTION EVR IC INTERFACE PORTS OPTION DIODE MATRIX INPUT OPTION DIODE MATRIX OUTPUT PI1/ ADI5 MULTI-PATH INPUT PORT. ACTIVE HIGH. EEPROM CONTROL PORT FOR RDS DATA MEMORY...
  • Page 38 FUNCTION OF MICOM IC KEY MATRIX TABLE : LC75854 KI 1 (50) KI 2 (51) KI 3 (52) KI 4 (53) KI 5 (54) KS 1 (44) M4 / SHUF M3 / DISC UP M1 / DOLBY PLAY / PAUSE M6/DISC DOWN AUDIO SEL.

  • Page 39: Ic Block Diagram

    11. IC BLOCK DIAGRAM 11-1. LC75854 (IC LCD DRIVER)
  • Page 40 IC BLOCK DIAGRAM 11-2. TDA7372B (Audio Power IC) : IC502...
  • Page 41 IC BLOCK DIAGRAM 11-3. TDA7365 (Audio Power IC) : IC502...
  • Page 42 IC BLOCK DIAGRAM 11-4. LC75371M (IC EVR) : IC501...
  • Page 43 IC BLOCK DIAGRAM 11-5. LC7270M / LC72722 (RDS) : IC201...

  • Page 44: Liquid Crystal Display

    12. LIQUID CRYSTAL DISPLAY 12-1. AKF-3825 / 8825 Series 10 11 12 13 14 15 16 17 18 19 20 COM1 8N DOT COM2 COM3 COM4 COM1 COM1 COM2 COM2 COM3 COM3 COM4 COM4...

  • Page 45: Output Connection Descriptions

    13. OUTPUT CONNECTOR DESCRIPTIONS OUTPUT CONNECTORS 8PIN CONNECTOR 26PIN ISO CONNECTOR 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 CDC-ON BACK-UP B+ NO CONNECTION 1. Rear right(+) REMOCON DATA 2.
  • Page 46 DAEWOO 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 Mc. Cem edited by...

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Akf-3825 series

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