Service Manual
Contents
1. ES p 11 O 4 82 0824 801 lo 0805 0804 2 on R827 2SC3311AIRTA UPD4027BC 55 E 165 0806 o UN4111AITA RELAY DRIVE B Q801 802 D UN4215TA LED DRIVE Q803 807 E UNATTIAITA 20 1ED DRIVE gt UNA111AITA POWER ON OFF 0808 E E 2 1309 1 d ov POWER SUPPLY Q807 504 MA185TA rH ae EUM Ad UN4215TA 3 AIC501 SWITCHING EN SVI3205B 806 p 165 POWER AMP 2 781 05 m p E Ber amm cup ve 2SC3311AIRTA E 0506 155291 Oe CLASS AA ov 24 Ov Tov ov Tov 8 9s Y 52 2 8536 TIAWAT 41 E 8528 8 0455 456 28 85 WES o _ 28 1309 2884 ane 98 Q455 CLASS AA lt oxen 1 80010 Ri PNE E 12222010 E _ 2 81V 42 15 Sones ast 0 ARES 1501 Q451 452 18 25026312. 24 c CURRENT Rae STABILIZER R533 C525 R513 515 1503 R529 2700 56 4410 1 49 10 1 80 I 120K m 501 4 8 dite 19 i 98 5 28 180P 4 8514 516 1832H 5 or c 8520 Sz 955 25 S 1 33 9 832 d x ag 2 225 9005 EL Positive Voltage Line Negative Voltage Line Source Signal Line MAIN CIRCUIT P C Board on pages 22 23 Q501 503 1 us 2SA992EFPTA 781 05 RELAY DRIVE r REGULATOR ES 5 2 2 5 E 3 A R782 A R783 13 3 m v S 0781 7 2502374 i 16803 16 9 REGULATOR 1 ON3131R 7 1 1 ISOLATOR 1 2W4 7K 165 4160 R562 1 180 co a gt 0543 25 1309 SWITCHING M R611 47K 16 4V 2 Q603 Sl 8 iy 6 3 2SC3940AQSTA br i5 58 398 8 8 e 2 28 262 25 9809 2SC3311AIRTA POWER ON DET oy Q601 602 606 611 612 NS 51
3. Technics ORDER NO AD9506164C8 Service Manual Power Amplifier Amplifier SU C800U Remote Control _ Colour T itt Suffix for Area Colour SE A900S Asia Latin America System SU A900D DIN 19 900 20 Hz 20 kHz continuous power output 7 Power amplifier ___5 9005 both channels driven 2X70 W 8 Q SE A9009 1 kHz continuous power output Because of unique interconnecting cables when a component requires service send or bring in the entire system both channels driven THD 1 2x85 W 8 Q i 2x120 W 4 0 63 Hz 12 5 kHz continuous power output both channels driven THD 0 7 2x80 W 89 2x105 W 4 9 harmonic distortion rated power at 20 Hz 20 kHz 0 01 8 Q E GENERAL intermodulation distortion Power consumption 285W 50 Hz 7 kHz 4 1 SMPTE 0 007 8 9 Power supply Residual hum and noise 0 3 mV For E and EG areas 50 2 60 Hz AC 230 V Damping factor 70 8 0 For GN areas 50 Hz 60 Hz AC 230 V 240 V 35 4 9 For GC area only 50 Hz 60 Hz AC 110 V 127 V 220 V 240 V Headphones output level impedance 540 mV 330 Q 0 6 3 Dimensions Wx Hx D 430 x 136 344 Load impedance Weight i 9 8 kg A or B BI WIRING 42 162 80 160 Input sensitivity impedance 1 33
4. Q 100 0805 10V 10 97 RCEICKAI00BG 16V 100 CB08 810 ECBTIHIO4ZPS 507 0 10 0821 A ECEAIEKAIOOB 29V 100 ECBT1CI03NSS 0801 902 ECEATEKN3R3B 0905 RCEIHKA4R7BG C910 RCELHKA4R7BG 0955 956 ECBT1C152JR5 81 9005 Cabinet Parts Location 5 9005 10 7 5 9005 Note The reference number represent grease and tool used for this unit Part Name amp Description Remarks CABINET PARTS LIST PACKING MATERIALS SS eee 1 RKMO219F K CABINET RPG2627 PACKING CASE E EG GC GN 4 1 MoN 4RBAMRC FAN MOTOR RPG2624 PACKING CASE 4 2 RMQ208 K MOTOR COVER mM PACKING CASE 80 0800 m reer M 4 0212 6 TERMINAL P7 RPN0917 PAD SU C800U 55 5 232 8 SPP730 PROTECTION COVER FF M85 SPRING SPP756 PROTECTION COVER SU C800U 027 6 REAR PANEL 10 RPQOIGA PAD P11 RPF0139 PROTECTION COVER MIRROR SHEET romz el
5. 5 9005 Installation of the bottom cover after replacement Screw XTB3 8J Prepare this screw to fix the bottom cover Bottom cover Bottom chassis ass y t o Transistor holder 1 After replceing the power IC or regulator transistor Align the ribs of bottom cover with lugs apply a sufficient quantity of compound grease RFKX0002 between the heat sink and the power IC or regulator transistor Radiation of power IC 2 Tighten enough the screws after replacing the power IC and regulator transisitor Otherwise the heat rabiation works little 3 Replacement the fan motor l Follow the item 1 on checking procedure for each P C B on pages 10 and 11 Fan case When replacing the fan motor align the boss of the fan case with the hole of the fan motor i Fan case Boss Fan motor XTW3 15T tmp o XTB3 8J Black Prepare this screw to fix the bottom cover Put a screwdriver at the root of the fan and remove it Remove the fan cap Remove the fan motor Remove the fan terminal cap Fan motor lt MDN 4RB4MRC REN S 12 Fan case Fan terminal cap 13 9005 4 Replacement for the meter ass y Follow the CE item 1 on checking procedure for each P C B on page 10 0 0 RHD26017 Remove the meter ass y RSEO006 Co
6. 165 DIODE MA4160M DIODE 165 DIODE gt e eo gt 15835200718 DIODE 4140 DIODE 165 DIODE SLR 305VC LED 165 DIODE 165 DIODE SLR 305VC LED 165 DIODE 0821 0822 824 0901 TRANSISTOR MA167 DIODE MA165 DIODE MA165 DIODE MA4100MTA DIODE MA165 DIODE MA4100MTA DIODE UN4111 TRANSISTOR 2902 RTA TRANSISTOR 903 906 TRANSISTOR D907 TRANSISTOR 2503311 1 TRANSISTOR TRANSISTOR 0917 911 912 165 DIODE 2914 165 DIODE 165 DIODE 2SC3311AIRTA TRANSISTOR 25 1308 TRANSISTOR VARIABLE RESISTOR S 28 Part No Ref No 2 3 POWER METER ADJ 9 0 EVNDXAA00B23 THERMISTOR S Part Name amp Description POWER METER ADJ RJS1A6606 RJP3G18ZA RJUOS 78007 THERMISTOR H901 902 ERTD2ZHLIO4T COIL S COIL tt A E EB EG GN 51 07650 49 402 L501 504 SLQY18G 10 197 ELEXTIROKA9 001 L RJU0S 7W004 SE A900S Part No Part Name amp Description CONNECTOR 6P 573034540
7. SVi3205B 12501 POWER AMP Rch 9 0 HEADPHONES SO A SPEAKERS OVER LOAD Q611 612 E DET FAN MOTOR SWITCHING Q601 8603 606 0543 604 605 ace POWER ON DET GB 4 0821 52 d 1 870 0781 0781 782 G8 6 07011704 0771 713 0771 772 775 AN78LOSTA VIRTUAL Ez BATTERY 828 0772 774 0773 776 VIRTUAL a 3 BATTERY S PL901 906 e NOTES H 1 gt SOURCE SIGNAL 5 0825 2 INDICATES PIN 3 POWER ON OFF No OF RIGHT CHANNEL 7 LOGIC GND AC BACKUP 0791 793 0795 797 VIRTUAL BATTERY 5 VIRTUAL BATTERY 0792 794 0796 798 3 27 POWER ON OFF To SU C800U JK801 9005 Replacement Parts List Notes Important safety notice Components identified by mark have special characteristics important for safety Furthermore special parts which have purposes of fire retardant resistors high quality sound capacitors low noise resistors etc are used When replacing any of components be sure to use only manufacture s specified parts shown the parts list The parenthesized indications in the Remarks columns specify the areas Refer to the cover page for area Parts without these indications can be used for all areas Remota Control Ass y Supply period for th
8. Een _ RUSIA606 CONNECTOR 6P 1702 703 ee 84705 RUP2Gl7ZA CONNECTOR 2P 8476 52550382204 0 25 20 751 755 RJSLAL101T1 CONNECTOR ERE 01777 RJSIA1 01T1 CONNECTOR lt 778 RJS1A1101T1 CONNECTOR 805146603 CONNECTOR 18018 RJSA6604 CONNECTOR 09 E EG GN 5 9005 Notes Resistance values are in ohms 1M 1 000k OHM Capacity values are in nicrofarads uF unless specified otherwise P Pico farads pF F Farads unless specified otherwise 1 1 000 OHM Part No Values amp Remarks Ref No Part No Values amp Remarks 1 AW 6 8K ERDS2TJ332 1 W 3 3 ERDS2TJ335T 1 44 RESISTORS i ERDS2T3473 1 48 1 28 53612 1 2K ERDS2TJ153 ERDAS36823T 1 4W 82K ERDS21J473 1 4 10K 1 44 100K ERDAS3G823T 1 4W ERDAF2VJ470T 1 4W ERDS2TJ683 ERDS2TJ103 1 44 150K ERDSIFVJ220T 1 24 ERDS2TJ473 1 28 ERDS2TJ222 1 44 2 ERDAS3GI83T 1 44 2K 10K ERDAF2VJIO1T 1 4W 1 4 120 ERDS2TJ333 1 4W ERD25FVJ100T R470 ERDAS3G102T 1 4W R4G5 468 ERDAFANJIOIT 1 48 8469 ERDAS3G103T 1 4W ERDS2TJ222 681E WW 580 ERDS2T
9. It is possible to record from tape deck 1 to tape deck 2 or DCC and vice versa To record from tape deck 1 to 2 1 Press TAPE MONITOR so that the SOURCE indicator illumi nates 2 SELECTOR so that the 1 indicator illuminates 3 Begin tape deck 2 for recording and tape deck 1 for playback To record from tape deck 2 to 1 1 Press TAPE MONITOR so that the SOURCE indicator illumi nates 2 SELECTOR so that the 2 0 indicator illuminates 3 Begin tape deck 1 for recording and tape deck 2 for playback ___ SE A900S 20 2 M 1 2 0 SOURCE MONITOR Tape deck Desired source TAPE 1 TAPE2 DCC SOURCE To check the sound recorded while recording is being made If a cassette tape deck with 3 heads is connected to the TAPE 1 or TAPE 2 DCC terminals it is possible to check the sound being recorded onto the tape Press TAPE MONITOR to select the deck tape deck 1 or 2 and set the monitor switch on the tape deck to TAPE TAPE 1 when recording on tape deck 1 TAPE 2 DCC when recording on tape deck 2 4 Be sure to switch the illuminated tape monitor indicator back to SOURCE once you have finished monitoring the sound being recorded SE A900S Operation Check and Main Component Replacement Procedures 11011 4 1 This section describes procedures for checking the o
10. This schematic diagram may be modified at any time with the development of new technology Notes 52 Voltage adjustment switch in 220V 240V position for GC area only 5801 Power STANDBY ON switch POWER STANDBY ON e S802 Speaker select switch SPEAKER A 5803 Speaker select switch SPEAKER VR909 Power meter adjustment VR 1 ch 910 Power meter adjustment VR ch SE A900S Voltage values and waveforms are measured ias indicated in the schematic diagram when test points between and and between and are shorted Indicated voltage values are the standard values for the unit measured by the electronic circuit tester high impedance with the chassis taken as standard Therefore there may existisome errors in the voltage values depending on the internal impedance of the DC circuit tester No mark Power ON Voltage and signal line Source Signal Line gt 5 Positive Voltage Line cccc ccc Negative Voltage Line important safety notice Components identified by mark special characteristics important for safety Furthermore special parts which have purposes of fire retardant resistors high quality sound capacitors low noise resistors etc are used When replacing any of components be Sure to use only manufacturer s specified parts shown in the parts list Caution and LSI are
11. 1 Design and specifications are subject to change without notice S N rated power 4 9 95 dB 110 dB IHF 66 Weight and dimensions are approximate Frequency response 5 Hz 70 kHz 0 3 dB 2 Total harmonic distortions measured by the digital spectrum 0 dB 0 5 dB 20 Hz 20 kHz analyzer AWARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public It does not contain warnings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death 1995 Matsushita Electric Industrial Co Ltd rights reserved Unauthorized copying and distribution is a violation of law SE A900S Contents 1 Page Page Before Repair ER 2 Operation Check and Protection Circuitry 2 Main Component Replacement Procedures 10 14 5 2 Measurements and Adjustments 14 Caution for AC Mains 3 Schematic Diagram 15 20 Connecting the Audio
12. RGRO227C Al REAR PANEL 80 REAR PANEL gt 060 uU oo RMCOIS8 TRANSISTOR HOLDER AL RAK SUL8OWH REMOTE CONTROL TRANSMITTER L jme me li qeu mum 0 1 p mona ume p wr wur o G0 mur mmm i m m 5 21 XIBS26 8 SHRBO06 SPACER emn suRo814 SPACER Nia cw wan sacs 8 XTB3 6G SCREW 740 WIRE ASS 2 8705 R 739064400Q FLAT CABLE 8706 RIU1805480XX FLAT CABLE SP W702 R73905390QQ FLAT CABLE 59 8703 RAJ1807220KX FLAT CABLE 7P 8801 1806090 FLAT CABLE 6P 8802 JREXO741 WIRE 458 Y 3P CN803 RMGO332 K SJP5213 2 PONER PLUG ADAPTOR GREASE OR JIG TOOL 23 24 25 26 21 29 30 31 3 33 34 3 3 35 36 7 8 B Packaging SE A900S Power amplifier A1 A2 A3 A4 P10 area only Pad P12 for EB GN areas 35 9005 SU C800U Control amplifier Printed in Japan F950711000 TW HH
13. CONNECTOR 3P RJT0S7W007 T RJTO057W004 1 SNE1004 2 SNE1004 2 L401 402 ELEXTLOOKAS TRANSFORMER S CONNECTOR 7P CONNECTOR 4P EARTH TERMINAL GND PLATE GND PLATE FUSE HOLDER FUSE HOLDER RTPIPSBOOS W POWER TRANSFORMER SUD E EB EG GN R91 T L1 L401 403 BLOZRN1R62T2 L791 1701 Fi 2063180 F2 2031180 8068 2507 3 15A 901 910 131 LAMP FUSE S XBA2C31TBO 2507 3 15 EB EG GN FUSE 250V 6 A GC EI m POWER TRANSFORMER SUB A 60 111 5 001 9 POWER TRANSFORMER AIN DEM RSYOO13H 0 LAMP S RSY0020N R RSY0019M 0 N GC FUSE HOLDER RELAY JACK S SJS9236 SJSD16 JKS01 RJHA801M 2 RJJ63TA01 RJS1A7402 1 52 EVQ21405R 5802 EVQ21405R S803 EVQ21405R 94 SPEAKER ESD26840A 94 VOLTAGE ADJ GC SW PONER SW SPEAKER A AC INLET A E EB EG GC AC INLET JACK INPUT SPEAKER TERMINAL SPEAKER TERMINAL HEADPHONE JACK CONNECTOR FAN MOTOR SOCKET gt CN771 776 RJS1A1101T1 CONNECTOR ERE
14. Components eese 4 Printed Circuit Board Diagram eee 21 25 Connecting the Speakers and Power Supply 5 Wiring Connection Diagram eene 26 Front Panel Controls 6 X Block Diagram eene 27 Listening to Sound EU 7 8 Replacement Parts List 28 31 34 tiet 9 Cabinet Parts 32 33 PACKAGING 35 Before Repair 1 Turn off the power supply Using a 10 9 10 W resistor connect both ends of power supply capacitors C701 C702 in order to discharge the voltage 2 Before turning the power supply on after completion of repair slowly apply the primary voltage by using power supply voltage controller to make sure that the consumed current at 50 Hz in NO SIGNAL mode should be shown below with respect to supply voltage 230 V 240 V 110V 127 V 220V 240V Power supply voltage AC 230 V AC 240 V AC 110V 127 V AC 220V 240V Consumed current 50 Hz 160 320 mA 160 320 mA 310 620 mA 160 320 mA Protection Circuitry The protection circuitry may have operated if either of the following conditions is noticed No sound is heard when the power is switched ON Sound stops during a performance T
15. sensitive to static electricity Secondary trouble can be prevented by taking care during repair Cover the parts boxes made of plastics with aluminum foil Ground the soldering iron Put a conductive mat the work table Do not touch the legs of IC or LSI with the fingers directly 20152 SE A9008 MAIN CIRCUIT P C Board on pages 22 23 POWER METER 8947 0914 ich Rch 10 4 x 0907 85 2SA1309AIRTA 12901 82 2 C3311AIRTA 2 SWITCHING CONT 6138 SWITCHING 2 M METER DRIVE AMP Bx K M901 M902 21 991 e 9 4680 PRSE 0 3V 110 4 lt 4 2 Om On D904 2 165 lt 785 12902 1 M5218AP 22 BUFFER POWER METER adio ADJ Lch 7 Qa01 402 E401 1C401 AN7062N 2SA1123RSTTA VOLTAGE PRE p 12502 SOURCE 98 RSN6000B SIGNAL Lch 88 R401 1 2 z AQ771 0773 2SK330GRYTA 25 2631 5 VIRTUAL BATTERY VIRTUAL BATTERY R772 1 4 120 2SJ105GRYTA 2SA1123RSTTA VIRTUALBATTERY VIRTUAL BATTERY 519 SE A900S D Positive Voltage Line Negative Voltage Line Source Signal Line
16. the three pin plug marked with the letter E or the Earth Symbol Before use Removal the connector cover as follows How to replace the fuse 1 Remove the fuse cover with a screwdriver 5 ampere 9005 Connecting the Audio Components Make sure that the power supply If connecting a graphic equalizer for all components has been Stereo connection camo Connect it between the PRE OUT turned off before making any White L terminals of t e control amplifier and connections Red INPUT terminals of the power amplifier m 1 Control amplifier Power amplifier 4 SPEAKERS OXD O COs ii Stereo connection cable included Amplifier connection cable included Ground wire not included Stereo connection cables not included Tape deck 2 or Digital compact cassette deck DCC not included Tape deck 1 not included Lf Soa PLAY OUT Graphic equalizer not included OUTPUT Second CD player etc Tuner not included not included p 0 SE A900S the Speakers Power Supply Right speaker not included Power amplifier P x Power amplifier Household AC outlet Connecting the speakers 8 Speaker cables not included The wires which are connected
17. to the positive terminals of the amplifier should be connected to the positive terminals of the speakers The negative terminals should be connected in a similar way terminals For connection to a second pair of speakers Speaker impedance When only the A or only the B terminals are used 4 1 60 e When both the A and the B terminals are used simultaneousy 8 160 CAUTION To prevent damage to circuitry never short circuit the positive and negative speaker wires Left speaker not included Power amplifier Connecting the power supply Connect the power supply only after all other connections been made AC power supply cord included Insertion of Connector Even when the connector is perfectly inserted depending on the type of inlet used the front part of the connector may jut out as shown in the drawing However there is no problem using the unit Appliance inlet Cooling fan The cooling fan operates at high power output levels only SE A900S _ B Front Panel Controls aim Nili rn Power amplifter D Power STANDBY switch 5 Power meters POWER STANDBY ON Indicate the output watts of this unit Press to switch the unit from on to standby mode or vice versa In standby mode the unit is still consuming a small amount of power When speakers having an
18. 25 3311 3 d l LOAD DET 552 m z R82 R823 Q604 605 50K FEK 28 3311 4 SWITCHING CONT abe BAS 5 oed 8 5 ag i 63V10000 1 D P300DLF 2 001 8707 1 4W6 8 0 CN701 03 63V10000 TUNE 793 2SC3940AQSTA C715 g VIRTUAL BATTERY oor uri 6 88 58 0791 45 2SK330GRYTA eae VIRTUAL BATTERY E 28 1791 iuH E 4 1 2 BB 15 39 5 6 5 3 9 3 5 5 9 2 Eu 8 8 5 gt 5 5 g S o o D 5 lt 2SJ105GRYTA 2SA1534AQRTA 8 VIRTUAL BATTERY VIRTUAL BATTERY To SU C800U JK801 on page 9 18 SE A900S POWER SWITCH PORE SA CIRCUIT P C Board on page 23 SP SWITCH CIRCUIT P C Board on pages 22 23 stR 305vc OPERATION E JK502 HEADPHONES HEADPHONES JACK CIRCUIT P C Board on page 23 CIRCUIT 21 501 SPEAKERS POWER SUPPLY CIRCUIT P C Board on page 24 4 Q701 25 3311 RELAY DRIVE POWER TRANSFORMER
19. 2KR5 81 5 ERDS2TJ471 1 4 470 EROS TI223 ERDS2TJ102 ERDS2TJ223 1 40 2 1 4 22 ERDS2TJ473 ERDS2TJ391 ERDSIFVJ472T 1 28 4 7K 4K ERDS2TJ104 ERDS27J103 1 4 ERDAF2VJ271T 1 48 270 1 4 22 1 4W 100 ERDS21J223 ERDS2TJ155 A 15 30 103 55 ECEATHKA2R2B 2237 LRCEOJKA221BV 1 10080 RCEQJKA221BV 23V 0 022U 6 3V 2200 0 3V 220 SE A900S 0707 __ 63V 560 709 710 ECQE2334KPW 250V 0 33U c ECQEZIO4KF3 2507 0 180 0 010 507 0 010 18V 0 010 25V 100 38V 100 6 3V 22000 0762 00 259 100 0763 1 10086 167 100 BCAOJM222B 6 3V 22000 0773 774 1 24878 50V 4 70 ECALHPXS470B 1 54708 100 RCELCKALOOBG ET pee peer Y Emma i EX spumam EE 21 O 20 a
20. CIRCUIT P C Board on page 24 Xt E ACIN 230 EEG 230V 2404 EB GN 50 60 2 14 55 1 QUE Fo T 4 For E EGJareas For EB GN areas 2401 SE A900S Power Source For GCJarea P C Board on page 25 POWER TRANSFORMER CIRCUIT MOV 127V 22 24 1 11 fm mE quove com 7 Q701 25 3311 RELAY DRIVE FAN MOTOR IN 110V 127V 220V 240V 50 60Hz 20 _ SE A900S Printed Circuit Board Diagram This circuit board diagram may be modified at any time with the development of new technology e LAMP RIGHT P C B REP2154A 2S 1485AH T 2 MTM put 5218 UPD4027BC AN7062N ONS131R BA6138 AN78LO5TA 2SA992EFPTA 2SA1534RTA 28J105GRYTA 2SA1123RSTTA 25 3940 05 25 2SC2631RSTTA RSN6000A SVI3205B 1SR35200TB 2SA1309AIRTA 2SC3311AIRTA UN4111 UN4215 Cathode P300DLF MA4036MTA SLR 305VC MA4056MTA MA4068L Cathode MA4100MTA Cathode 4140 Anod Cathode 1 140 i MA4160M Cathode 4220 MEA Anode 21 SE A900S MAIN P C B AE E There are two kinds of Type A B in the M
21. E Nua n VOLTAGE ADJ P C B REP2154E 1S 305 SE A900S B Wiring Connection Diagram JK601 FAN MOTOR NOTE we NE BLK Black T701 WHT White BRN Brown transformer Power SupPLy To CN761 W702 SPEAKERS SU CB00U INPUT 1 5 bos m m m m n T1 Power transformer MAIN P C B POWER TRANSFORMER P C B CN701 CN702 Black Rch Lch CN801B CN803 LAMP RIGHT P C B sP DJ POWER SWITCH 26 Block Diagram AN7062N E VOLTAGE RSN6000B 1 502 12 Q453 Q454 INPUT Q455 0456 RSN6000B 5218 BUFFER AMP METER BA6138 a E F METER DRIVE POWER 4 MER us 44 o our lo D906 D605 801 2 8 9 D807 808 gt 8 4 lt COMPRESSER 1 0 lt 4 6 906 907 b i D903 D904 0917 5 9 vrsoovrsio L 7 METER ADJ 0901 01 808 822 824 12803 ONS131R 5801 803 27 eor SYSTEM CONTROL ao 4 LED DRIVE CIRCUIT SE A900S
22. J103 i AW 10K K ERDS21J223 22 471 472 ERDS2TJS61 1 49 ECAIHPXSAR7B SOY 4 70 R491 492 ERDAS3G823T ERDS2TJ362T 1 4W 3 6K ERDS2TJ221 1 48 50V 4 ERDAF2VJ121T 1 4W 120 ERDAF2VJ470T 1 48 ERDAF2VJ392T 1 40 3 9K W is pum 344 sm vm im Vm 10K ERDAF2VJ121T ERDS2TJ108T ERDS2TJ221 220 ERDS21J562 1 44 5 6K 5 ERDS2TJ223 47 ERDS2TJ391 70P 29V 47 ECCR2H220J5 C413 414 ECCV2H070D 415 416 02 5 50 1000P 0427 1 2237 25V 0 0221 457 460 50V 3 30 047 5 50V 0 10 1 101 85 50V 100 100 ERDS2TJ223 1 4 51018 6 3 1000 ERDS2TJ823T 1 48 8 ERDS2TJ222 14 ERDS2TJ223 22K ERDS2TJ391 390 ERGISJ681E ERDS2TJ223 1 4W 22K ECQV1H473JM3 SOV 0 047 1018 5V 1000 OV ERGISJ152E ERDS21J103 1 4 10K ERGISIIB2E 618 151 150 ERDS2TJ103 1 4 10K 1 4W 2 2K ERGISJ181E 180 RDS2TJ222 1 44 5 6K ERDS21J223 22K ERDS2TJ562 1 48 150K ERDS2TJ682T 1 48 6 8K ERDS2TJ154 140 22K 509 ECEALHNIOOSB C511 512 560 5 ECQBIH223JF3 50 0 0220 ECBTLHLO2KBS 507 1000P ECBT1C27
23. TA mark or the BSI mark on the body of the fuse If the plug contains a removable fuse cover you must en sure that it is refitted when the fuse is replaced If you lose the fuse cover the plug must not be used until a replacement cover is obtained A replacement fuse cover can be purchased from your lo cal dealer CAUTION IF THE FITTED MOULDED PLUG IS UNSUITABLE FOR THE SOCKET OUTLET IN YOUR HOME THEN THE FUSE SHOULD BE REMOVED AND THE PLUG CUT OFF AND DISPOSED OF SAFETY THERE IS A DANGER OF SEVERE ELECTRICAL SHOCK IF THE CUT OFF PLUG IS INSERTED INTO ANY 13 AMPERE SOCKET new plug is to be fitted please observe the wiring code as shown below If in any doubt please consult a qualified electrician IMPORTANT The wires in this mains lead are coloured in accordance with the following code Blue Neutral Brown Live As colours of the wires the mains lead of this appli ance may not correspond with the coloured markings iden tifying the terminals in your plug proceed as follows The wire which is coloured BLUE must be connected to the terminal in the plug which is marked with the letter N or coloured BLACK This apparatus was produced to BS 800 SE A900S The wire which is coloured BROWN must be c nnected 10 the terminal in the plug which is marked with the letter L or coloured Under no circumstances should either of these wires be connected to the earth terminal of
24. ain P C B 0806 2322 9 Vics A 224 223 IND TEX C M zl Ev NIE Notes Type B is different from Type A in part of the foil patterns and the parts Repair the unit with attention to the differences SP SWITCH 2154 25 22 9005 HEADPHONES JACK P C B REP2154A 2S 021252 Se POWER SWITCH P C B REP2154A 2S OPERATION SPEAKERS gt E Mex 2 2 0 SE A900S REP2154A 1S E EG G EIET TRANSFORMER P C B d ges Ti Power MET 1 j id rs T 7i B D 3 DN MN POWER REP2154C 1S EB SUPPLY 2 E EG 230V 240V EB GN 50 0Hz 24 SE A900S Power source P C B For GC area IN 110V 127V 220V 240V 50 60Hz Ti Power transformer POWER TRANSFORMER P C B REP2154E 1S T701 Power transformer BE 14855 POWER SUPPLY P C B REP2154E 1S qas VOLTAG
25. anel Claw Release the claws and then remove the rear panel Release the hooks Check the main P C B as shown below GND n s Connect lead wire Qm XTBS3 8JFZ1 Black XTB3 20JFZ Black e XTB3 8JFZ Black SE A900S Main Component Replacement Procedures 1 Replacement for the foot Follow the CEP in item 1 on checking procedure for each P C B on pages 10 and 11 Remove the 4 heat melted posts on the bottom chassis ass y with a pair of nippers or similar tool Foots replace the foot RKA0053 A on the bottom chassis ass y melt the 4 posts with a soldering iron or install it with a screw XTB3 6J Heat melted posts Bottom chassis ass y S0 dering iron 5 Step 2 Foot RKA0053 A Remove the power supply P C B e XTB3 20JFZ Black 2 Replacement for the power IC and regulator transistor Follow the in item 1 on checking procedure for each P C B on page 10 Fold the joints 6 portions Cut the joints as shown below 6 portions 2 Locate nipper to the Ni thin portion the joint Bottom cover Cutthe joint Unsolder the terminals of power IC and regulator transistor ESTE 9 Regulator transistor Q781 501 2SD2374PQAU 501820561 502 RSN6000A
26. he function of this circuitry is to prevent circuitry damage if for example the positive and negative speaker connection wires are shorted or if speaker systems with an impedance less than the indicated rated impedance of this unit are used If this occurs follow the procedure outlined below 1 Switch OFF the power 2 Determine the cause of the cause of the problem and correct it 3 Switch ON the power once again Note When the protection circuitry functions the unit will not operate unless the power is first switched OFF and then ON again Accessories AC power supply cord E EG GC areas RJAO019 2K 1 1 Stereo connection cable Power plug adaptor for GC area only SIP2276 1 1 SJP5213 2 1 Remote control transmitter Batteries RAK SU180WH 1 4 2 Note These are available on sales route E Caution for AC Mains Lead EB area code model only For your safety please read the following text carefully This appliance is supplied with a moulded three pin mains plug for your safety and convenience 5 fuse is fitted in this plug Should the fuse need to be replaced please ensure that the replacement fuse has a rating of 5 ampere and that it is approved by ASTA or BSI to 51362 Check for the AS
27. impedance of 8 Q are connected the output level will be as indicated However if the speaker impedance is 16 Q the output level will be one half the indicated value and if the impedance is 4 the output level will be dou This switch will not operate when the control amplifier is in ble the indicated value standby mode Actual meter ____ BA _____ STANDBY indicator STANDBY output indication impedance of the speakers 9 P When the unit is connected to the AC mains supply this indica tor lights up in standby mode and goes out when the unit is turned on 6 Speaker select buttons indicators SPEAKERS Operation indicator OPERATION This indicator illuminates when the power amplifier is in the nor mal operating condition If the 4 and wires of the speaker cables are shorted or if a circuit abnormality such as DC voltage in the power output to the speakers is detected the protection circuit will operate and the OPERATION indicator will turn off 4 Headphones jack PHONES 2 6 3 330 Q f Listening to Sound SELECTOR SE asoos 13 7 iod 1 TAPE 2 DCG SOURCE 7 MONITOR 5 Desired source E VOLUME MAX UO O O 00 0 1 1 2 AUX TUNER PHONO 1 Before operation set VOLUME to the MIN position 1 2 Press POWER of the control amplifie
28. nnector CN802 Connector CN801A Remove the angle 8028 GNB03 2 and lamp P C B Measuring Instruments and Special Tools AC electronic voltmeter AC EVM AF oscillator AC Power Meter Adjustment L Test equipment connection is shown in Fig 1 2 Before turning ON the set adjust VR909 L ch and VR910 R ch to mechanical center position shown n Fig 2 Turn the power ON make sure that the power meter is mechanically adjusted to 0 point shown in Fig 3 Apply a 1 kHz signal to the input terminal so that the output voltage of speaker terminal is 8 94 V adjust the signal level with the attenuator of AF oscillator Adjust VR909 L ch and VR910 R ch so that the power meter 0 001 0 01 0 0 100 200 30 20 10 054 100 200 Schematic Diagram MAIN CIRCUM PUR 16 49 SP SWITCH CIRCUIT 19 HEADPHONES JACK CIRCUIT cd 19 POWER SWITCH CIRCUIT ess 19 LAMP RIGHT 19 LAMP LEFT CIRCUIT Me 19 d POWER TRANSFORMER CIRCUIT 19 20 E POWER SUPPLY CIRCUIT 19 20 VOLTAGE ADJ CIRCUIT GC area only 20
29. peration of the major circuit boards and replacing the main components 2 For reassembly after operation checks or replacement reverse the respective procedures Special reassembly procedures are described only when required 3 Select items from the following index when checks or replacement are required 4 Illustrated screws are equivalent to actual size 5 Refer the parts No on the page of Main Component Replacement Procedures if necessary e Contents Checking Procedure for each P C B SEN Page 1 Checking for the main P C B e00069000000900906900600000e90909000902096 0902096cc022 9222992 1011 Main Component Replacement Procedures 1 Replacement for the foot 0099000909009000900900209000900909000099099900960999500009900009c9c00999909 12 2 Replacement for the power IC and regulator 9 9 6 12 13 3 Replacement the fan motor 4 1 4 9 4 4 13 4 Replacement for the meter 2557 9 56 14 B Checking Procedure for each P C B 1 Checking for the main P C B Pull out the front panel ass y SNE2129 1 Black 6 0 XTBS348JFZ1 Black 10 ___5 9005 Flat cable Remove the hooks Cord clamper Remove the flat cable from cord clamper Rear p
30. r Press POWER of the power amplifier The OPERATION indicator will illuminate after approximately 4 seconds Once the power amplifier has been turned on both amplifiers can then be turned on or to standby mode using POWER on the control amplifier Press TAPE MONITOR so that the SOURCE indi cator illuminates Each time the button is pressed the indication will change as follows TAPE 1 TAPE 2 DCC SOURCE Ium Press A and or B to select the speaker system s to be used The corresponding indicator s will illuminate 5 Turn SELECTOR to select the desired source The indicator which corresponds to the selected Source will illuminate TAPE 1 Tape deck 1 2 DCC Tape deck 2 or DCC AUX Component connected to the AUX terminals CD CD player or CD changer TUNER Tuner PHONO Turntable 6 Start the desired source Refer to the appropriate operating instructions for details 7 Turn VOLUME to adjust the volume level After listening is finished Be sure to reduce the volume level and turn off the units by press ing POWER of the contro amplifier SEA BASS Q TREBLE JL DEFEAT To adjust the tone quality VA Press TONE in to the ON position Turn BASS to adjust the low frequency sound Turn TREBLE to adjust the high frequency sound If listening without adjusting the tone quality press TONE so that it is at the DEFEAT position To adjus
31. ree years from termination of production The BF mark denotes the standard part VRD indicates parts that are supplied by Video Recorder Division ii 5 Part No Part Name amp Description 10501 IC POWER AMP 10502 IC V AMP 0721 IC REGULATOR 10761 _ ANT8LOSTA REGULATOR 10801 802 UPD4027BC 10 2 FLIP FLOP ped 2452 453 IC OPTO ISOLATOR IC METER DRIVE AXP IC BUFFER AMP D503 504 0505 0601 0602 0603 604 TRANSISTOR S ruis mih na 504 806 25C33L1AIRTA TRANSISTOR 0611 612 2503311 1 TRANSISTOR 0701 25331 1ATRTA TRANSISTOR 2SK330GRYTA TRANSISTOR 2SJLO5GRYTA TRANSISTOR 2SC2631RSTTA TRANSISTOR 2SA1123RSTTA TRANSISTOR 0701 704 5706 711 714 0721 762 0771 772 773 775 776 781 0782 0791 794 gt gt 45 55 gt 0797 798 D801 D803 804 2SD2374PQNU TRANSISTOR 806 0781 25 TRANSISTOR 807 808 0792 25S103GRYTA TRANSISTOR 0809 811 7 c DIODE MALES MA4068L SLR 305VC was ux memes
32. t the sound balance 3 Turn BALANCE to adjust the left right sound balance To mute the sound level Press MUTING on the remote control transmitter The MUTING indicator on the amplifier will illuminate Press once again to return to the previous volume level The MUTING indicator will turn off To listen through headphones Use VOLUME to reduce the volume level and connect the headphones Headphones not included Plug type 6 3 mm phone plug stereo type If sound from speakers is not wanted press SPEAKERS A and or B to turn off the speaker indicators Avoid listening for prolonged periods of time to prevent hearing damage Recording SELECTOR 1 It is possible to record from units which are connected to the rear AUX CD TUNER or terminals to cassette tape decks DCC decks which are connected to the 1 TAPE 2 DCC terminals 1 Press TAPE MONITOR so that the SOURCE indi cator illuminates 2 Turn SELECTOR to select the desired source to be recorded AUX Component connected to the AUX terminals CD CD player or CD changer TUNER Tuner PHONO Turntable 3 Prepare the tape deck for recording Refer to the operating instructions for the tape deck for detailed adjustment of the recording level etc 4 Start the tape deck for recording and play the source Recording from tape to tape
Download Pdf Manuals
Related Search