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Daewoo AKF-3825 series Service Manual

Manual is about: Car Audio Basics, RDS

Summary of AKF-3825 series

  • Page 1

    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.

  • Page 2: Table of Contents

    Table of contents 1. Product specifications ..................................................1 2. Line drawing ........................................................................2 3. Emergency trouble shoot ............................................4 4. Adjustments .............................

  • Page 3: 1. Product Specifications

    1 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 frequency response : 100hz( + 3db), 10khz(-5 + 3db) control bass/treble : 10 + 3db at 100hz/10khz tape section track format : ...

  • Page 4: 2. Line Drawing

    2 2. Line drawing 2-1. Front side akf-3825 basic akf-8825 basic akf-8825 rds - partial detachable - 2 x 7w - remote control - auto stop deck mechanism - electronic volume control - loudness - local / dx - partial detachable - 2 x 7w - remote control - auto reverse - electronic volume control - loudn...

  • Page 5

    3 line drawing 2-2. Rear side.

  • Page 6: 3. Emergency Trouble Shoot

    4 3. Emergency trouble shoot 3-1. General function no sound from speakers yes no yes output connector is missing output connector is inferior goods put exactly output connector in. Change output connector to superior goods yes no power ic, output socket is inferior goods change power ic, output sock...

  • Page 7

    5 emergency trouble shoot 3-2. Tuner function hearing noise only yes no yes no selected the station tuner module is inferior goods. Select exactly broadcasting frequency. Change tuner module to superior goods. Yes weak frequency area caused by elevations change to goods of r.D.S function. Yes a b a ...

  • Page 8

    6 emergency trouble shoot 3-3. Tape function no sound from speakers yes no yes tape is inferior goods no signal play output use only superior goods put exactly deck output connector in. Yes no deck mechanism is inferior goods. Change deck mechanism to superior goods. Yes a a sound is low or not clea...

  • Page 9: 4. Adjustments

    4. Adjustments 7 4-1. Equipments connections.

  • Page 10

    Adjustments 4-2. Tuner module adjustment locations 8.

  • Page 11

    Adjustments 4-3. Am (mw/lw) adjustment method 9 step 1 band covering rf-tracking figure 1 figure 2 figure 2 522khz 30dbu mod 1000hz 30% 603khz 30dbu mod 1000hz 30% 1404khz 30dbu mod 1000hz 30% 522khz 603khz 1404khz adjust am osc coil to reach vt1.2v fig.7 adjust am rf1 and am rf2 for maximum output ...

  • Page 12

    Adjustments 4-4. Fm adjustment method 10 step 1 if (zero volt) rds af level figure 3 figure 2 figure 5 98.1mhz 60dbuv no modulation 98.1mhz 30dbuv mod. 1khz 45khz dev. Mono 98.1mhz 40dbuv mod. 1khz 45khz dev. Stereo left at right ch. 98.1mhz 98.1mhz 98.1mhz adjust fm det for 0v + 0.03v fig.3 (cw03) ...

  • Page 13

    Adjustments 4-5. Tape adjustment method 11 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. Step 1 head azimuth adjustment tape speed figure 6 figure 6 mtt-114n or equiv...

  • 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

    Deck mechanism exploded view & parts list tn-301nx-219 22 8-2. Parts list for akf-3825 no part name chassis side ass’xy (x) camera s tapping screw m2 x 3 head panel spring head panel ass’y azimuth spring head p - 7442bs - 3453 tams screw m2 x 9 azimuth screw m2 x 9 head base camera screw m2 x 5.5 wa...

  • Page 25

    23 deck mechanism exploded view & parts list tn-301nx-219 no part name gear plate ass’y cam gear sensor g. Lock lever g. Lock lever spring gear plate spring p washer cut 1.2 x 3.8 x 0.35 leaf switch mcv002235vdd function lever spring push plate lift up lever revers spring function lever ff lock leve...

  • Page 26

    24 deck mechanism exploded view & parts list 8-3. Exploded view tn-715 dh-109 for akf-8825 series.

  • Page 27

    25 deck mechanism exploded view & parts list 8-4. Parts list for akf-8825 series tn-715 dh-109 no description chassis rivet ass’y p head ms35p-sf005 head sw ass’y (d) head panel ass’y (d) p.Gear metal p.Gear pinch roller arm (f) ass’y pinch roller arm (r) ass’y mg plate z ass’y reverse spring p.S ac...

  • Page 28

    26 deck mechanism exploded view & parts list no description hp push plate p.P spring hp return arm main gear v middle pulley main belt fr lever ass’y lock plate lock plate spring sw qas-1229-4 push sw sw-230-2 fix screw tams screw (tapping) s2.0 x 5 camera screw (tapping) s2.0 x 3 camera tapping scr...

  • Page 29: 9. Parts List

    9-1. Akf-3825e 27 9. Parts list caution is a recommendable part for essential stock. R location code name 9tp0z00200 97t8839101 cdxf0h473m 97t8861100 97t6225400 97t6229506 97t8861000 1la3161--- 1tda7365-- 97t6366000 5lc302p501 97t7611000 5xjx4r500e dsp301na-- dktzj3r0b- tz2sd1862r tz2sb1240r tz2sd18...

  • Page 30

    Parts list 28 location code name 1lc75854e- 97t8860500 97t6229606 97t8861100 97t8861000 97t6004700 ic chip driver conn as conn conn as conn as deck mecha description lc75854e qip64e ffc 6p 170 1.0 imsa 9610s-06d e3p 80 3p(s)sh e4p 180 4p(s) tn-301nx-219 ic701 cnrem cw901 cneq cntp dk010 r r r r r dz...

  • Page 31

    29 parts list 9-2. Akf-8825 location code name 9tp0z00200 97t8839101 cdxf0h473m 97t8813004 97t6225400 97t6229506 97t8861300 1la3161--- 1tda7372b- 97t6366000 5lc301pa18 rv1417504- 97t7611700 5ll228k02k tz2sd1862r tz2sb1240r tz2sd1862r tz2sb1240r tz2sd1862r tz2sd1862r tz2sd1862r dsds2838-b tkrc111s-b ...

  • Page 32

    30 parts list location code name tkrc111s-b tkrc102s-b tkrc102s-b tkrc102s-b tkrc102s-b tr chip tr chip tr chip tr chip tr chip description krc111s krc102s krc102s krc102s krc102s hq403 hq407 hq408 hq414 hq415 dz02w10v-b dz02w6r2vb dz02w5r1vb dz02w9r1vb 1lc72722m- 12bs9929u1 124lc16bsq 1lc75371m- 97...

  • Page 33: 10. Function Of Micom Ic

    31 10. Function of micom ic 10-1. Pin configuration (top view).

  • Page 34

    32 function of micom ic 10-2. Pin description pin 1 80 78 77 71 76 73 31 75 74 72 70 69 68 67 79 2 52 53 54 55 pin name xin connection to 4.5mhz crystal output compared sith phase if local oscillation frequency is higher than standard frequency. Output is high, if not output is low, and if same outp...

  • Page 35

    33 function of micom ic pin 39 40 44 42 41 22 43 65 64 38 47 62 63 60 59 66 pin name po1 po0 pn0/beep 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. Beep comes out at 2.08, or 3.75khz depending on operation reques...

  • Page 36

    Function of micom ic 34 pin 18 32 33 34 35 36 37 56 57 58 51 50 49 48 10 46 17 19 20 21 16 pin name pd0 pq0 pp3 pp2 pp1 pp0 po3 int0 pj3 pj2 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 cd-c con...

  • Page 37

    Function of micom ic 35 pin 4 5 6 27 28 29 30 23 24 25 26 61 3 7 8 9 pin 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 ...

  • Page 38

    36 function of micom ic key matrix table : lc75854 in out ks 1 (44) t.Up m4 / shuf ki 1 (50) ki 2 (51) ki 3 (52) ki 4 (53) ki 5 (54) m3 / disc up m6/disc down (metal) audio down loud m2 m5 / repeat mute / rds scan up m1 / dolby audio sel. /rds enter l0/dx p.Scan / atp cdc play / pause t.Down band di...

  • Page 39: 11. Ic Block Diagram

    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: 12. Liquid Crystal Display

    42 12. Liquid crystal display 12-1. Akf-3825 / 8825 series 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 com1 8h 8g 8k 8d 23 4f 4n 4e st 8a 8o 8l 8m 24 ta 3b 3i 3c 8f 8n dot 26 3a 3o 3l 3m 8e 25 3h 3g 3k 3d 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 7...

  • Page 45

    13. Output connector descriptions 43 output connectors 8pin connector 26pin iso connector 1 cdc-on back-up b+ no connection data ground r-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. Di...

  • 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 edited by mc. Cem.