SERVICE MANUAL STEREO CASETTE DECK MODEL K
Contents
1. 820 470 390 1K 820 470 390 8 u Silo 210 2 0 26 5686 Io E z a J 3 H 1 3 d i 216 lo 5 0201 otitis 1 Q203 Q204 Q205 Q206 Q709 BJ254GK F L TUBE AIN3 LOAD IN LOAD OUT AIN2 AINA AINO 70 120 LINEMUTE OSCOUT Bad pod JOA eau ioo SYSTEM BUS ROT SENSOR Q601 TRAY MOTOR DRIVER Q702 PLAY SW Q711 BR93LC46F WE2 POWER FAILURE MECHA 0707 TA72918 MOTOR DRIVE GE CASSETE HIGH D PSTAN SOLENOID Q201 Q710 Pod HA12169FB IN SW POSITION SW MOTOR DOLBY DECODER NECHA SYSTEM RESET MECHA MECHA MECHA K 505TX MICROPROCESSOR TERMINAL DESCRIPTIONS Pin VO Terminal Description Pin Terminal Description eee dele cum 1 33 CAPSTAN Capstan control 2 34 SOLENOID Solenoid control 11 Ke 3 35 OPEN EE losa RN Eg Segment output pin 39 RIOUT System cord output pin Me NN 40 CLOSESW Door close deteci 41 OPENSW Door open detect O kk 42 RECMUTE REC Mute control Active high 43 DOLBYRESET Dolby IC reset Active low STBYLED Control of Standby LED 44 400Hz 12kHz Switched 400Hz 12kHz Active high OSC port ILAMENT Switched Filament 45 OSCOUT Osc output 400Hz 12kHz Active high 14 DCHECK Door open 46 LINEMUTE Line muting Active low 15 POFF Power failure port LESER 70 120 Tape select port 16 PRECINHSW Cassette pack detect LS REC PB Mode select port 17 MET2. LIST REF NO PART NO 6 NOOO gt PO MO N N N N N sch AH BH da da AA NO gt WH OD Om gt O P101 P702 P703 P705 P902A T901 PPP U1 U2 U3 U4 U5 U6 2001 A F901 27100334A 27175323 27175325 838130088 27190897 27301394 27191045 28140020 830440069 27150407B 27300750 27191137 27191138 833130100 27122849 838430088 27111214 28141456 27212314 28135247Y 28198864 28191796A 28184795 28141470 838930088 28148476 2009990659 DESCRIPTION Chassis Leg Leg 3TTB 8B Self tapping screw KGLS 3S Holder HL 18 0 Clamp KGPS 3 5S Holder 4T x 10 x 40 Cushion 4TTC 6C BC Self tapping screw Shield plate S RELIEF 42271 Bushing cord ML Holder MR Holder 3TTP 10P Self tapping screw Rear panel 3TTB 8B BC Self tapping screw Front bracket Cushion Front panel Badge Facet Clear plate Cover Cushion 3TTB 8B UN Self tapping screw TRAY Door NSAS 14P0919 Socket AS 20022392635ANSAS 26P0918 Socket AS 2009990469 204319013 253193HIT 253277MIL 2301298 2301297 1N281546 1A 1N281546 1B 1N281547 1A 1N281547 1B 1N281548 1A 1N281548 1B 1N281549 1A 1N281549 1B 1N281550 1A 1N281550 1B 1N281551 1A 1N281551 1B 244247 252074 NSAS 10P0623 Socket AS NCFC3 19013 F F C AS CEE Power supply cord lt P gt AS UC 2 18 Poewr supply cord D NPT 1314P Power transformer P NPT 1314D Power transformer D NAAR 7146 1
3. 1019 1000 F 16V Elect Q701 22241605R3 TMP87CH14F 3CV2 C916 354741009 104 F 16V Elect Q702 22241609R2 BR93LC46F WE2 Resistors Q707 22240239 TA7291S R716 5210258 NO6HR1KBC Trimming Q905 222780055 78M05HF R723 R728 49163272404 RM1 10lJ 2 7K 4 Array Transistors R901 R902 453534794 A 0 47 5 1 2W Metal Q601 Q703 2213354 or 2549335 R909 R910 443521004 102 5 1 2W Metal oxide 2213355 2SA933S S Push switches Q704 Q710 221281 or DTC114YS or S717 25035699 NPS 111 S662 Q712 Q713 2213570 RN1207 Sockets Q705 Q706 2212853 or 2SB1068 K or JL901B 25050269 NSCT 5P97 2212855 2SB1068 U P102 2009990473 NSAS 12P0627 Q708 Q711 2213090 or DTA114YS or P705A 25051826 NSCT 19P1613 2213590 RN2207 P601 2009990499 NSAS 6P0653 Q901 Q903 2202724 or 2SB1569A D or Plugs 2202725 2SB1569A E P201A 25055806 NPLG 17P762 Q902 Q904 2213284 or 2SC1740S R or P202A 25055706 NPLG 10P662 2213285 2SC1740S S P203A 25055701 NPLG 5P657 Q906 2211504 2SA950 Y P204 25045305 NPJ 4PDBL164 Q907 Q908 2211705 or 250655 P402A 25055709 NPLG 13P665 2211706 2SD655 F P701 25045330 NPJ 2PDBL184 Diodes P702A 25055157 NPLG 13P141 D701 D703 223163 or 1SS133 or P703A 25055149 NPLG 5P133 D706 223205 1552704 7048 25055444 NPLG 6P426 D702 224470472 MTZJ4 7B Heat sink D708 D910 224470562 MTZJ5 6B Q901A Q903A 27160211 1 RAD 68B D901 D902 22380035 or GP104003E or Pan head 22380260 RL1N4003 Q901B Q903E 82143010 3P 10FN BC D903 D904 224471203 MTZJ12C D905 D906 22380035 or GP104003E or PLAYBACK AM
4. 43524704 443521004 Sockets 2009990473 25051238 Plugs 25055233 Holders 27190608 1 K 505TX DESCRIPTION MY92 50V 103J APS100V 101J APS100V 121J 1004 F 16V Elect 47 F 16V Elect 220 F 16V Elect MY92 50V 472J MY92 50V 223J APS100V 123J 104 F 16V Elect MY92 50V 183J 47 Q 5 1 2W Metal oxide 102 5 1 2W Metal oxide NSAS 12P0627 NSCT 13P1028 NPLG 2P217 CRAMP UA 0 VO POWER TRANSFORMER BOARD NAPS 7150 1A 1B C901 C902 P903 P902 Capacitors 374721044 Sockets 25051637 25051990 Plugs 25055676 Fuse holders F901A F901B 25052133 JL901A Wire holders 25051109 ECQ V50V 104J NSCT 2P1424 P NSCT 2P1777 D NPLG 2P632 N NSCT 1P2031 D NSCT 5P896 DISPLAY CIRCUIT PC BOARD NADIS 7151 1A 1B Q709 D704 D705 D707 701 S716 P704A P705B NOTE FL tube 212129 Diodes 223163 or 223205 225338 224470432 Push switches 25035699 Sockets 2009990470 25051991 BJ254GK 155133 or 1SS270A SLR 332VR MTZJ4 3B NPS 111 5662 NSAS 12P0624 NSCT 19P1778 lt P gt 230V model only lt D gt 120V model only ADJUSTMENT PROCEDUR PRECAUTIONS 1 Before adjustment clean the following parts with an alcohol moistened swab recording playback head erase head pinch roller capstan 2 Do not use magnetized screwdriver for adjustment 3 Demagnetize recording playback head with a head demagnetizer Connection Line output of instrumen
5. A Main cuircuit PC board ass y D NAAR 7146 1B Main circuit PC board ass y lt P gt NAAF 7147 1A Playback amp PC board ass y D NAAF 7147 1B Playback amp PC board ass y P NAAF 7148 1A Dolby circuit PC board ass y D NAAF 7148 1B Dolby circuit PC board ass y P NAAF 7149 1A Recording amp PC board ass y D NAAF 7149 1B Recording amp PC board ass y lt P gt NAPS 7150 1A Power transformer PC board ass y D NAPS 7150 1B Power transformer PC board ass y P NADIS 7151 1A Display circuit PC board ass y D NADIS 7151 1B Display circuit PC board ass y P CMAL2Z7 Deck mechanism 2A SE EAK Fuse European model only K 505TX MECHANISM EXPLODED VIEW Cassette mechanism Loading mechanism ZA K 505TX a 2 A IA MECHANISM EXPLODED VIEW PARTS LIST REF NO PART NO DESCRIPTION FF18W 12 Belt F R FF19H 11 Main belt F567 626 Control circuit PC board FR24S 11 Flywheel ass y F513 870 Recording Play head F514 129 Pinch roller R F514 130 Pinch roller L F522 048 Clutch Flywheel F522 052 Clutch F525 327 Main motor Joo P F564 640 Loading motor UE15S 14 SPPB11 Micro switch UE18P 21 SPPB2A Leaf switch FF19L 12 Loading belt F527 078 Cassette holder m mnm oR WP K 505TX PARTS LIST MAIN CIRCUIT PC BOARD NAAR 7146 1A 1B CIRCUIT NO PART NO DESCRIPTION CIRCUIT NO PART NO DESCRIPTION C913 374721044 ECQ V50V 104J ICs C914 C915 35474
6. ALSW Metal switch detect 49 BIAS Bias select Low when metal Active high 8 FRECINHSW Cassette pack detect LEVELLCH A D Control for input level Lch Power supply for display Ba LEVELRCH A D Control for input level Rch Control for EEPROM EN KEYINA Data input for EEPROM 53 KEYIN3 A D Control 54 Data output for EEPROM IN 12 A A Ik 1 Chip select for EEPROM Active high Standby port Ref voltage for A D comparater Active high GND Connect to GND Ref voltage for A D comparater 5V GRID8 Clock OSC 8kHz 2810 XOUT Clock OSC 8kHz RESET System reset Grid output pin PACKSW Cassette detect switch 1 HIGHSW High switch detect High when highposition Play switch detect Low when playback 2 PLAYSW O IS O O O E ld E E W E E E S E B ni Hi E d Hi E B Co x Re 2 2 2 A A PACKING VIEW REF NO PART NO DESCRIPTION 31 29091888 Pad A 32 29091889 Pad B 33 29095835 0 515 650 550 Sheet 35 282321 Staple 36 29110141 PP Tape 37 2010376 Pin cord AS 38 2010375 3 5 MINI PLUG Cord AS 39 29100180 T0 05 D240 W250 Bag 40 29053741 Carton 41 29362845 EAN Label 43 29343076 E K505TX Instruction manual 29343077 U3FSI K505TX Instruction manual lt P gt 29343079 CT K505TX Instruction manual lt D gt 29343078 U3GSwD K505TX Instruction manual lt P gt lt P gt European model only D A
7. K 505TX Ref No 3675 ONKYO SERVICE MANUAL 052001 STEREO CASETTE DECK MODEL K 505TX SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBER APPEAR AS SHOWN IN THIS MANUAL MAKE LEAKAGE CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER ONKYO IMAGINATIVE SIGHT amp SOUND SPECIFICATIONS Track format 4 tracks 2 channels Erasing system AC erase Tape speed 4 8 cm sec Wow and flutter 0 1 WRMS 0 2 DIN Frequency response Metal position tape 30 to 15 000 Hz 3 dB High position tape 30 to 14 000 Hz 3 dB Normal position tape Power supply rating AC 230 240 V 50 Hz AC 120 V 60 Hz Power consumption 12 W 230 240 V 50 Hz 14 W 120 V 60 Hz Dimensions 205 mm x 76 mm x 278 mm Width x Height x Depth Weight 2 6 kg Specifications and external appearance are subject to change without notice as a result of product improvement 30 to 13 000 Hz 3 dB Signal to noise ratio 54 dB metal position tape Dolby NR off Noise reduction of 10 dB above 5 kHz and 5 dB at 1 kHz is possible with Dolby BNR Noise reduction of 20 dB at 5 kHz is possible
8. NO ICs 22241144R3HI Transistors 2213090 or 2213590 2211705 or 2211706 221281 or 2213570 Diodes 223163 or 223205 224470472 Coils 233407 Capacitors 374722224 374721044 354780109 354780229 354780109 354741009 354780479 354780109 374721044 354741009 391941027 374721534 374723944 Sockets 25051528 25051235 25051230 Plugs 25055689 DESCRIPTION HA12169FB DTA114YS or RN2207 2SD655 E or 2SD655 F DTC114YS or RN1207 1SS133 1SS270A MTZJ4 7B NMC 6079 ECQ B50V 222J ECQ V50V 104J 14 F 50V Elect 2 2 u F 50V Elect 14 F 50V Elect 104 F 16V Elect 4 7 u F 50V Elect 14 F 50V Elect ECQ V50V 104J 104 F 16V Elect 1000 16V RA2 ECQ B50V 153J ECQ V50V 394J NSCT 17P1315 NSCT 10P1025 NSCT 5P1020 NPLG 2P645 RECORDING AMP PC BOARD NAAF 7149 1A 1B Q401 Q402 Q403 Q404 Q405 Q601 Q703 D601 L401 L402 L403 L405 L406 IC 222959 Transistors 221281 or 2213570 2211504 2201883 2213354 or 2213355 Diode 223163 or 223205 Coils 231127 231215 231085 MPC1297CA DTC114YS or RN1207 2SA950 Y 28C1213 C 2SA933S R or 2SA933S S 1SS133 or 1SS270A NCH 4183 NLO 2059 NCH 2133 CIRCUIT NO PART NO C401 C408 C409 C410 C411 C412 C413 C414 C419 C415 C416 C417 C418 C420 C422 C427 R410 R413 R719 P103 P402 P401 E811 Capacitors 371121034 370131014 370131214 354741019 354744709 354742219 371124724 371122234 370131234 354741009 371121834 Resistors 4
9. P PC BOARD NAAF 7147 1A 1B 22380260 RL1N4003 ICs D907 224471603 MTZJ16C Q101 22240147 MPC1330HA D908 D909 223163 or 155133 0102 222905 1228 223205 1SS270A Transistors Oscillator Q103 Q104 221299 or DTC114TS or X701 3010190 CST8 00MTW 2213600 RN1211 Capacitors Capacitors C701 C912 354780479 4 7 u F 50V Elect C101 C102 374726814 ECQ B50V 681J C705 354741019 100 uv 16V Elect C103 C104 391980227 2 2 u F 50V RA2 C903 C904 374721044 ECQ V50V 104J C105 C106 374728224 ECQ B50V 822J C905 391954727 4700 F 25V RA2 C107 C108 391941017 100 F 16V RA2 C906 C908 354742219 220 F 16V Elect C109 C110 354741009 104 F 16V Elect C907 391941027 1000 4 F 16V RA2 C111 C112 374721834 ECQ B50V 183J C909 391941027 1000 F 16V RA2 C113 391944717 47 F 16V RA2 C910 354762209 22 F 35V Elect 114 354741009 104 F 16V Elect C911 354781019 100 u F 50V Elect Resistors R115 R116 5210265 NO6HR50KBC Trimming R117 443521214 1209 5 1 2W Metal oxide Sockets P102 P103 2009990473 NSAS 12P0627 Plugs P101A 25055136 NPLG 6P120 NOTE THE COMPONENTS ID ENTI FIED BY MARK N ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK REPLACE ONLY WITH PART NU MBER SPECIFIED DOLBY CIRCUIT PC BOARD NAAF 7148 1A 1B CIRCUIT NO Q201 Q203 Q204 Q205 Q206 Q207 D201 D202 D203 L203 L204 C203 C208 C209 C214 C215 C216 C217 C218 C219 C220 C221 C232 C233 C237 C238 C239 C240 C241 C242 C243 C246 C247 P201 P202 P203 P205 PART
10. sian model only ONKYO CORPORATION Sales amp Product Planning Div 2 1 Nisshin cho Neyagawa shi OSAKA 572 8540 JAPAN Tel 072 831 8111 Fax 072 833 5222 ONKYO EUROPE ELECTRONICS GmbH Industriestrasse 20 82110 Germering GERMANY Tel 089 849 320 Fax 089 849 3265 E mail info ONKYO CHINA LIMITED Units 2102 2107 Metroplaza Tower 223 Hing Fong Road Kwai Chung N T HONG KONG Tel 852 2429 3118 Fax 852 2428 9039 K 505TX ONKYO HOMEPAGE http www onkyo co jp
11. t level freq EN Tape speed Head azimuth Playback Frequency counter to P205 or LINE OUT terminal AC voltmeter amp oscilloscope to P205 AC voltmeter level to P205 Frequency counter to lead wire of erase head Auto Rec adjustment Blank Normal UD 1 90 High UD C 90 Metal XS C 60 ES TEST EQUIPMENT TOOL REQUIRED Audio Oscillator Digital frequency counter Oscilloscope Attenuator AC voltmeter Non magnetic screwdriver Test tapes TCC 153 10kHz 15dB MTT 111N 3kHz 10dB MTT 150 Dolby level calibration 400Hz tone 200nWb m Output indicator Adjustme nt point Refer to Fig 2 3010Hz Maximum level Frequency counter AC voltmeter AC voltmeter Frequency amp same phase Fig 1 at channels L TCC 153 MTT 15 Normal tape Normal tape counter Push a auto adjust button S717 PLAY torque 30 70g cm Use the test tape TW 2231 FF REW torque 80 180g cm Use the test tape TW 2111 Back tension 2 6g cm Use the test tape TW 2111 K 505TX ADJUSTMENT POINT MAIN CIRCUIT PC BOARD PLAYBACK AMP PC BOARD DOLBY CIRCUIT PC BOARD RECORDING AMP PC BOARD PHASE CHART 0 deg 45 deg Rec Playback head DI REV FWD 90 deg 180 deg S K 505TX MAICROPROCESSOR CONNECTION DIAGRAM 1 8K 1
12. with Dolby C NR Input Jacks LINE IN 2 Input sensitivity 80 mV Input impedance 50 kohms Output Jacks LINE OUT 2 Standard output level 500 mV Output load impedance over 50 kohms Motors DC servo motor 1 Heads REC PB Special Hard Permalloy 1 Erase head Ferrite 1 SERVICE PROCEDURES 1 Replacing the fuse EH This symbol located near the fuses indicates that the fuse used is fast operating type For continued protection against fire hazard replace with same type fuse For fuse rating refer to the marking adjacent to the symbol Ce symbole indique que le fusible est a rapide Pour une protection permanente n untiliser que fusibles de meme type Ce darnier est la qu le present symbol est appse CIRCUIT NO PART NO DESCRIPTION F901 252074 2A SE EAK Fuse K 505TX BLOCK DIAGRAM RIP R115 R116 HEAD DOLBY NR EQ METER AMP DISPLAY X Q102 Q201 Q709 O Q101 3 70 120 Q103 Q104 O 77 KEY CONTROL IN LINE 3 OUT O BIAS OSC AND HX PRO ERASE Q401 Q405 HEAD L401 L402 L403 MICROPROCESSOR X Q701 5717 77 POWER TRANSFORMER AUTO AND REGULATOR 12V for SIGNAL ADJUSTMENT MECHA AND DRIVER START KEY Q901 5V 12V for MECHA for MICROPROCESSOR 9903 9905 SPEED R716 22V for F L TUBE Q906 K 505TX Lu gt Q O l 6 gt PARTS
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