Aiwa CS-880 H Service Manual Download Page 36

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CS-880H,HG.U,UC

W IR IN G - 1

N O TES (1)

B(+) Pattern jjB S S Others pattern

(2) The voltage is the reference value measured with a tester (20 K ohms/V DC) when there are no signals.

An asterisk (* ) indicates that the value was measured with a vacuum-tube voltmeter during recording.

CS-880H,HG,U,UC

Summary of Contents for CS-880 H

Page 1: ...eparation 22 3 dB at 1 kHz Auto stop level FM 22 10 dB at 98 MHz AM 60 10 dB at 1 008 kHz TAPE RECORDER SECTION Tape speed 4 8 cm s 3 Recording system Erasing system Record bias frequency Distortion F...

Page 2: ...RTS To avoid troubles when disassembling or replacing the main parts follow the chart diagram as below Radio chassis Including radio chassis tuning display MS A f pattern side PC Boards Tuning circuit...

Page 3: ...fix the fibre paper using two sided tape etc because it is likely to lift up when it is peeled off once 2 Lower all the lever switches in the direction of the arrow 2 Remove 9 knobs 5 0 3 Be sure to...

Page 4: ...o prevent the pointer of the level meter from being damaged Installing the radio chassis 1 Hook the jack plate to the tab of the rear lid while paying attention not to pinch the wire Compress the radi...

Page 5: ...AIWA I CS 880H HG U UC Removing Mechanism 1 Loosen the screw and remove the hook of the rod 2 Remove 4 screws 5...

Page 6: ...ttention to the springs and levers etc shown in the figure below the lever REC driver Be sure to hook the T spring PLA Y lever to the cam of the gear when installing the gear PLA Y Hook it from the in...

Page 7: ...w 2 the boss A of the gear PLA Y touches the trigger lever PLA Y and the gear stops rotating When the gear PLA Y rotates the lever PLA Y moves in the direction of the arrow 3 along the cam groove on t...

Page 8: ...r wheel to rotate in the direction of the arrow 2 the boss A touches the boss of the trigger lever FF and the gear FR cam stops The FR lever B moves in the direction of the arrow 3 along the groove of...

Page 9: ...e gear FR engages with the gear fly wheel rotates in the direction of the arrow 3 boss B touches the trigger lever FF and rotation stops The FR gear B is moved in the dirSfction the arrow 4 by means o...

Page 10: ...ss B touches the trigger PAUSE and rotation stops The PAUSE lever moves in the direction of the arrow 3 along the cam groove of the PAUSE g e at that time The PLA Y idler lever and the pinch lever ass...

Page 11: ...ed from the R t ever driver and on y the the trigger lever REC moves in the direction of the arrow 1 REC operation is released The PLA Y operation is performed simultaneously at that time so the REC l...

Page 12: ...e up reel disc ass y is rotating so the boss of the lever auto A moves along the cam A groove of the gear auto kick When the reel discs S T sides stop the lever auto A stops in the condition being mov...

Page 13: ...AIWA J CS 880H HG U UC SPRING APPLICATION POSITION 13...

Page 14: ...CS 880H HG U UC j AIWA EXPLODED VIEW 1 1 I 2 3 I 4 I 5 7 B H 14...

Page 15: ...ack cover ass y H HG model only 1 1 13b 09 017 842 01 Back cover ass y U UC model only f t 1 8 2 5 8 7 038 01 Back cover ass y H HG m od el on ly 1 8 2 5 8 7 0 4 2 0 1 Back cover ass y U U C m odel on...

Page 16: ...CS 880H HG u j u EXPLODED VIEW 2 1 I 2 B H 16...

Page 17: ...D R500 H U UC 4 HG 3 2 15 82 588 634 01 Earth REC CS 770 1 2 16a 82 587 008 01 Dial plate Silver H U UC model only 1 2 16b 82 587 061 01 Dial plate Blue H HG model only 1 2 16c 82 587 062 01 Dial pla...

Page 18: ...CS 880H HG U UC J AIWA E X P L O D E D V IE W 3 1 I 2 B U 0 2 I2 H PW I 7 3 5 0 2 5 P W I 7 3 5 0 25 PW I 7 3 5 0 25 18...

Page 19: ...1 T spring Center shift 1 3 15 82 585 312 01 E spring Brake R 1 3 16 82 585 253 01 Lever Brake R 1 3 17 82 585 286 01 Rubber cushion Brake 3 18 82 585 252 01 Lever Brake L 1 3 19 82 585 265 01 REV lev...

Page 20: ...CS 880H HG uuc I AIWA B H EXPLODED VIEW 4 ___ ___ I ___ L V 3 I2 f V T T 2 6 5 PW2 1 3 5 0 25 32 20...

Page 21: ...AUSE 1 4 31 82 585 246 01 Gear PAUSE 1 4 32 82 585 247 01 Gear Auto kick 1 4 33 82 585 249 01 PLAY lever 1 4 34 82 585 250 01 Lever REC drive 1 4 35 82 585 307 01 T spring REC lever 1 4 36 82 585 266...

Page 22: ...Fig 2 2 1 Operation During FM Reception The pulse swallow system is first outlined The relationship between fosc and fref is expressed as osc N re f 1 If N is assumed to be P notation fosc ni Pn2 P2n3...

Page 23: ...ince signals are fed out during AM FM re ception one or other is connected to LPF 3 CE High Normal operation Low Memory held operation stops 4 PSC Feeds out frequency division ratio switch ing signal...

Page 24: ...28 30 29 47 48 50 43 44 46 45 12 13 11 3 51 42 34 41 SEGM ENTOUT A1 B1 C1 D1 E1 F1 G1 A2 B2 C2 D2 E2 F2 G2 A5 B5 C5 D5 E5 F5 G5 AA BA CA DA EA FA GA F1 F2 DP1 DP2 DP3 DP4 DP5 CH LCD segment output pi...

Page 25: ...g no output appears at point C and when there is an output at pin 15 point F is set to a low level and no signal is fed out to point C A trigger pulse is produced at point G by the above two AND circu...

Page 26: ...its attack time and recovery time are extremely short Because of the boosted level the output must be not distorted When a signal exceeding a certain fixed level is fed out it is taken out by the Q49...

Page 27: ...8 87 051 171 11 Poly vinyl sack for instruction 1 9 87 056 009 41 Distributors list H HG UC model only 1 10a 87 056 059 01 Guarantee card G HG model only 1 10b 87 056 045 01 Guarantee card U U model o...

Page 28: ...81 0525 1 Z i A I W A c o l t d...

Page 29: ...5H VR5 87 021 667 01 Volume 20ki2 A VOLUME CF2 87 008 235 01 Ceramic filter 10 7 S1 87 031 621 01 Lever switch FUNCTION U UC model only S2 82 588 622 11 Slide switch REC PB CF3 87 008 225 01 AM cerami...

Page 30: ...027 365 01 87 027 332 01 87 027 097 01 87 027 716 01 87 027 228 01 87 031 496 01 87 021 624 01 87 015 318 01 87 015 425 01 MS circuit board H HG model only MS circuit board U UC model only IC TC9138P...

Page 31: ...ransistor 2SC2240 GR Transistor 2SC1815 Y Pin 4P REC M UTE C IRC U IT BOARD SECTION PCB H 0 7 2 D1 S9 MS C IRC U IT BOARD SECTIO N 82 587 642 21 89 110 154 01 87 027 097 01 82 587 642 01 REC mute circ...

Page 32: ...symbol This symbol is given to important parts which serve to maintain the safety of the product and which are made to conform to special safety specifications Therefore when replacing a component wit...

Page 33: ...rmance s t i e FUNCTION TAPE S I2 MS B SW S 2 3 P R E S E T CH A N N EL 4 S2 M 4 REC PB P B S I3 P U S E SW O FF S 24 P R E S E T C H A N N EL 3 S3 l 6 TAPE SELECTORfLH S 14 SY N C iO F F S 2 5 P R E...

Page 34: ...AIWA J SCHEMATIC DIAGRAM 2 10 1 2 1 3 1 4 1 5 1 6 B PIN PIN PIN 2 8 1 Q TUN ER C B PIN PIN PIN 2 9 10 H TUN ER C B...

Page 35: ...10 1 2 13 14 15 16 17 18 1 9 JTUNER C B C2 CONTROL C B H CONTROL C B J S32 P U P L 2 lUGHTI J LIG H f SWITCH C B PIN I l H TUNER C B PIN PIN PIN I2 8 ffi l E STUNER C B PIN PIN PIN 2 9 10 0 TUNER C B...

Page 36: ...B S S Others pattern 2 The voltage is the reference value measured with a tester 20 K ohms V DC when there are no signals An asterisk indicates that the value was measured with a vacuum tube voltmeter...

Page 37: ...TP3 4 is 56 mV 560pA Ratings L H 38 mV 380 xA M ETAL 82 mV 1820 uAI B pattern of bias OSC circuit I Bias OSC Frequency Test Point 8 Bias Frequency Adjustment Settings Recording mode Test point TP5 OS...

Page 38: ...Others pattern J2 The voltage is the reference value measured with a tester 20 K ohms V DC when there are no signals But is with AM reception 4 I 5 I 6 I 7 I 8 I 9 I 10 I 1 1 1 2 1 3 14 1 5 1 6 H PO W...

Page 39: ...andling precaution The C MOS JC s construction makes this part susceptible t damage by static electricity and so take sufficient care ii regard to following articles 1 Need to be put on conductive she...

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