Service Manual
Contents
1. oT VCR2 in Q V Logical TVIN 124 citcuit VSEL1 BA7625 1 1302 VIDEO SELECTOR Logical circuit E 2 16 Y iN 00 VCR1 Lo VDP IN BA7625 VIDEO SELECTOR VSEL3 50 TC4W53FTE12L CINES G SIGNAL SELECTOR LA7213 1061404 SYNCHRONISED SEPARATOR 1 SEP SEP GND VDD J 5 a SSEL Q1304 TC7WO2FTE12L NOR GATE MB90082PF117 1402 OSD CONTROL HN Separate circuit Synchronising detect circuit zo 1410 1411 TV MONITOR Q 12 244 VIDEO vour Jor z 91306 Analog SW Jas 1 2 1 Q1404 1405 10 HSYNC NTSG um di 11 SYNC Q signal generate Video signal generate circuit Display memory control Output control 14 55 B 28 Avss CGROM 4FSC dock generate circuit X1401 17 734475MHz TC4053BF 1 1405 SIGNAL SELECTOR SA TX50 FM ANT AM ANT 7120 FRONT END MEE Y eea aes RE amp 1 3 1 19 69 1 4 osc gt gt col 4 1 O For E EB areas 1 Buffer LA1832A Q191 193 1 595824522772 MW LW2. 58 Intermodulation distortion IHF 46 dB stereo quieting sensitivity rated power at 60 Hz 7 kHzz4 1 SMPTE 22 uV 75 Q 0 3 8 0 Total harmonic distortion Damping factor 25 6 Q MONO 0 296 Load impedance STEREO 0 39 Front S N AorB 4 69 MONO 60 dB 75 dB IHF and B 8 16 STEREO 58 dB 71 dB IHF Center 4 16 Q Frequency response Surround 4 16 0 20 2 15 kHz 1 dB 2 dB Alternate channel selectivity PRE AMPLIFIER SECTION 1400 kHz 6548 Frequency response i Capture ratio 1dB CD TAPE VCR 1 VCR 2 VCR 3 VDP Image rejection at 98 MHz 40 dB VDP6CH TV 20 2 20 kHz 1 dB IF rejection at 98 MHz 70 dB Input sensitivity and impedance Spurious response rejection at 98 MHz 70 dB CD TAPE VCR 1 VCR 2 VCR 3 VDP AM suppression 50 dB VDP6CH TV 300 mV 34 kQ Stereo separation S N at rated power 6 Q 1 kHz 40 dB TAPE VCR 1 VCR 2 VCR 3 VDP Carrier leak VDP6CH TV 70 dB 19 kHz 30 dB 35 dB IHF Tone controls 38 kHz 50 dB 55 dB IHF BASS 50 Hz 10 to 10 dB Channel balance 250 Hz 6 3 kHz 1 5 dB TREBLE 20 kHz 10 to 10 dB Limitting point 12 Bandwidth IF amplifier 180 kHz 1996 Matsushita Electric Industrial Co Ltd p All rights reserved Unauthorized copying and QC nics distribution is a violation of law SA TX50 Motor Troubleshooting Guide The Model SA TX50 employ fan motor error sensing electronics If the cooling fan is not opera
3. 92 VCR1 R 1sv Tov Tiav Tov R1313 R1317 220 220 OUT Q1301 1302 Ma 28 1308 08 01425 BUFFER 0 01 l Q1302 xdi B 50 4 84 01450 0 01 C1423 5 3V 100 H 1C1401 I TC4W53FTE12L Q1404 1405 SIGNAL SELECTOR Q1 408 141 0 01411 2SC3311AQSTA i VIDEO AMP 25 38 58 01411 01410 4 9 154 1 5 0 1V 5 Ci400 1401 zT 502 2 330 R1429 lt lt 8 SEd 11404 5 LA7213 sog 101405 zl SYNCHRONIZED TC4053BF 8 SEPARATOR SIGNAL SELECTOR ET 4 9 3 01401 165 p lt 1403 UN4111AITA SWITCHING 1 1403 TC7WO2FTE12L NOR GATE Q1406 1407 1409 2SA1309AQSTA BUFFER AMP Q1401 25 3311 08 CLIPPING D1402 MA165TA omn a C CO 8 z 9 8 9 0 9 9 0 0 o e o o 101402 99 a F S 8 5 2 7 38 OSD CONTROL TER guide on page 74 1 1402 01402 2SC3311AQSTA 8 CUPPING 0143 78 165 9 403 A 10 31271 zoo lt lt 2 Eas 5 2 CIRCUIT JW1308 1307 CIRCUIT CN1405A m on page 46 on page 52 o
4. 101117 101118 101119 TC7SO4FTE85L TC74HC164AFL TC7S32FTE85L INVERTER 8 SHIFT INVERTER REGISTER SA TX50 D X SUB WOOFER SP DRIVE EL po eee ee 1 4 8V y 81 2521 91 o L SP DRIVE AB SIGNAL Lch gt gt e lt i 0914130213006 8 8 7 5 4 1 4 S3SSSEREREESSEE gt gt 55157709 23v 101104 101105 aay G2 832 TC9332F 022 TP15 G4 Fsa2 1C9332F 022 53 11 26 564 DIGITAL SIGNAL TP16 53 23 Fs64 DIGITAL SIGNAL TP16 53 4 EBCO PROCESSOR Vss 62 PROCESSOR Terminal guide Terminal guide ACK on page 73 on page 73 FDO IFDi 69 c D IFCD 27 0 E CS 10 4 6 a sT 55 A 2 55 27 o8 z 58 xil B 101113 101112 c C1178 TC7WU04FT12L TC7W74FTE12L 11748 INVERTER D FF B 01220 1 1 0 TERMINAL PANEL CIRCUIT CN1102A CIRCUIT JW1103 on page 44 on page 53 48 SA TX50 FM signal gt Surround speaker drive signal Lch Notes gt gt Subwoofer speaker drive signal gt Center speaker drive signal 1 wo 5 2 e as 5 di E Qc 121109 1 2 1 1106 1108 4320 D A CONVERTER L1110
5. A 8 95 8 DSPCS2 DSPCD M 5 DATA DSPACK Q i 22 Program ROM Multiplier Adder Temporary Counter Register Work register bus p Jj Data bus poor xpo gc ______ __ _ Delay RAM 14 34 52 Confficient Confficient address Delay RAM generator DATA RAM RAM ROM llc Offset RAM re ce ee ee Qu 42 44 1 36 1153 13 12 5 4 TC9332F 022 X KEELE DIGITAL SIGNAL PROCESSOR TC7W74FTE12L TC74HC164AFL TC7W74FTE12L TC7S04FTE85L TC7S32FTE85L TC7WUO4FT12L LOGIC CONTROL D FF INVERTER 1117 1119 LOGIC CONTROL D FFANVERTER SHIFT REGISTER SA TX50 eSignal line gt FM signal AM MW LW signal Wu Subwoofer signal 222 Surround speaker drive signal gt Center speaker drive signal D A CONVERTER AK4320 VM D 20 21 aa e De emphasis Control 9 7 GERE Serial Input 8 Interface NJM2115MTE1 Q L P F 8x 17 interpolator SCF CTF Rch AI I eee ee 4 23 Clock OSC Divider _ D A CONVERTER AK4320 VM 9 De emphasis 1C1110 Control NJM2115MTE1 L P F 222255 L P F 223522 D A CONVERTER AK4320 VM NJM2115MTE1 23 t Clock OSC Divider bis 1 Q Sa 1 21 Em 22 i
6. R310 10K 10K mela MT 1 4 4 R 9162N STB GND R316 10K A B B c ag CNt101A 90990609 90909090 888585 29229229 560290565 a To l S VIDEO JACK 2 s ll DIGITAL piatat CIRCUIT JW301 CIRCUIT JW1101 on page 48 on page 50 on page 47 E 1405 579 584 SSEL VMUTE N EXDET D GND 4 4 VIDEO TERMINAL CIRCUIT CN1405 MN FD EB CBE CAOPQRST AB EDCBADA CN808 10 E 00000000 000000900 00000000 orucgotcz zLxo 9Nur gt lt lt ue m To EJ FL PANEL To FL PANEL E FL PANEL CIRCUIT CN809A CIRCUIT 810 CIRCUIT 811 on page 44 on page 44 on page 44 on page 51 SA TX50 IN OUT TERMINAL CIRCUIT P C Board on 67 10604 E 83310 e fe VOL C601 R601 16V10 1K gt se ov 292 58 1 58 6 as D ahs 1 IC601 M5218AP BUFFER AMP ur R602 ov A SENALTO T PARALLEL REGISTER 2x3 25 85 ag 55 28 o set T C697 8 16V10 IC605 9 53310 889 ELECTRONIC VOL C603 R603 50V3 3 1K 10502 5218 BUFFER SENALTO
7. VR901 20K B BASS B FOKE e TREBLE ope 28 38 1 ae AUDIO IN 8 S Rch 1 VCR3 I JK405 qe IN B 0 1 88 ag OPERATION 1 CIRCUIT 5 62 OO oed 0005 5 OPERATION 2 2 21 5655 225 CIRCUIT 21 9 y P C Board on page 63 avis IN OUT pe D TERMINAL CIRCUIT 4 VIDEO 88 88 401 52 TERMINAL CIRCUIT 25 25 fe a CN1306 on page 51 74 137v Ns gA os Q801 23 88 HP818 2 58 ae HEADPHONES 28 137v ah som 9802 E ERIS JARs more 8 208 3 3 3K 9801 804 HEADPHONES JACK CIRCUIT P C Board on page 63 MUTING Notes gt signal IN OUT TERMINAL P C Board 6 gt AM signal DIGITAL CIRCUIT P c Board on page 64 g 53 1 1114 1115 T CIRCUIT CN1101B LM2940 TSM LMZS40TSM m on page 52 11125 4 59 1004H A 9 1 11115 1 84H gg 58 R1106 Rt108 R1116 5 6 1K 330 Sx BS 55 Ma 330 AK5340B VS o 1 p CONVERTER 5 2 1 5 8 25 22 581 58 121102 1 2 121101 1102 NJM2115MTE1 FILTER AMP 4 2 ay 101116 oe Q1101 ER UN4213AITA SWITCHING
8. 1 Pd gl 1 855 8 5 as EI 1 90001 8 2 81 win 22 3 E 8 H ect 28 lt 5 5 8 gt ud 7 758 2 amp l 1 zz uoc 5 Tin E 2 8I oR So 5 5 8 IN uL onczuq yeecWefsfuye ciu an ears cu am ub J 4 X29 lt 2956 lt E 25 5 58 25 A 4 5 2 8 H gt 8 gt ao 8 85 100 JK101 FM ANT 059 AM LOOP S30KHZ gt 1710xHz SA TX50 Notes gt FMsignal 9 FM signal gt AMsignal 18 gt OSC signal R104 Q106 UN411FTA 25 27871 FM IF 0v 13 9V 14V 1151 3 4 56 24V 13 9V 01 LA1832A 4 R147 R143 FM AM IF AMP DET AM OSC MIX FM MPX ATOK 22 141 171 50 iK x Se mes 55 2 R139 ii 83 81398 27K 88 j 2 2 0 5 5 9 09 9 MIX a T Q107 108 2SC3311ARSTA BUFFER AMP R148 R144 470K 22K FREQUENCY DIVIDER C142 R172 50V1 R119 18K C128 0 01 AB A i B oo Orr 38 MAIN CIRCUIT CN102A CIRCUIT CN101A on page 52 on page 52 SA TX50 To EI MAIN To EJ MAIN To FL PANEL CIRCUIT P C Board on page 61 CIRCUIT CN809 CIRCUIT C
9. 2 1 8 AI SCF 17 Reh interpolator Modulator 1 1 Q 23 Clock OSC Divider bis 3 rT 1 4 1 2 3 22 10 11 24 SA TX50 ELECTRONIC VOLUME 604 CS3310 KP MUNERE 14 11 semen A y 8 M5218AP Serial to Control gt C Butter amp Register Bored 7 ot 1 104 gt 11 5 ELECTRONIC VOLUME m 8 SIGNAL SELECTOR Control VDP TC9162N Register I VDP6CH M Serial to Parallel 5218 1 602 d i 5 1 602 Register CENTER T Vis x x e ER tte Buffer amp SUB 11 12 WOOFER 25 8 L 10 16 Buffer amp 4289 0 24 Buffer amp SURROUND ELECTRONIC VOLUME SY 14 11 m gt 2222 qp U X Serial to Parallel Register Control Register SA TX50 eSignal line gt FM signal AM MW LW signal wap Subwoofer signal ZZ Surround speaker drive signal Center speaker drive signal hh 1 xcd gt POWER RSN33M5 114 D 3 B6 5 0 09 0826 828 5218 DECODER POWER AMP E 82 b e CENTER CENTER CENTER SPEAKERS Buffer amp 2 0817 818 841 Switching 7 818 84 5218 DECODER OUT PUT
10. 23 3 3K 3 r 6 24V 12 9 IC101 13 99 LA1832A FWAMIFAMPDETAMOSC R147 8143 470K 22K L Jes 55 0107 E 3 55 C143 Ri39 141 8 9 8 27 1K 8 gt Rr 981 0144 5071 og H Qa 1 90 ON 2 9 0107 108 2503311 5 BUFFER R148 8144 470K 2 2K C142 R172 7H B 18K C128 0 01 AB A 0000000 CN102 Sous CN101 822878 8 88 5 MAIN 2 CIRCUIT CN102A CIRCUIT CN101A on page 52 on page 52 TUNER CIRCUIT For EG GN GU areas Board on page 60 SA TX50 v ecce edm ee 1 iu lt m Set 9 ax ti 100 942 o Se 2 1 gt 00 eu lt 855 1 oz lt at 5 1 oz 1 1 O0LAE S m 0812 5 celu H 1 lt m o a 4000 amp 1 95 1 9 1 1 295 13 8 Secr 1 56 2 94S 2 1 7 E gt 1 b 5 i gt o 1 Da 5 x Sty i lt a m q VIISQV VW z 9eiu 2 1 92 gt gt XL 8 05 8 lt d lt 1
11. CN1103 820 8204 7 SPEAKERS TERMINAL 1 P C B SPEAKERS TERMINAL 2 P C B Cony FAN MOTOR Power transformer POWER HEADPHONES OPERATION 2 911 909 i 1 6 JW915 JW917
12. 82 Regulator m ANT9LOSTA 0709 712 725 728 101114 E Regulator PWR RELAY Q714 1701 82 SUB POWER 07175749 TRANSFORMER 5 TUNER CIRCUIT For E EB areas P C Board on page 60 JK101 FM ANT 059 2120 FRONT END ENV17290G1Y poet ooo 25 2620 25 238 MIXER 1 RF AMP 5 SIGNAL i L 22P 15 22722223 i X 1 5 1 1 Q x EE 9 5 123 4 3 1 9 I l I 1 2 1 25 360 28 2986 1 OSC BUFFER pet amr cT EET HEC ES REC 8 1 OSC A SIGNAL B AM LW MW OSC SIGNAL A Dod D AM 52 25 LW MW Po 58 1 55 SIGNAL EFI 20 24 Q e Q191 193 2SC3311ARSTA I1 5 10 1W MW SWITCHING Q103 104 2SC2785FETA FM AM LOOP FILTER 10102 LC7218 PLL FREQUENCY SYNTHESIZER F 522 2 1611 2 C101 0 01 C174 16V 100 R103 100 Vs SA TX50 Notes gt FMsignal 00004 gt signal gt AMsignal 9 gt OSC signal R104 1K ovi Q101 ETA 411 25 27871 FM ON FM IF AMP v 0v 13 87 14V R121 5
13. _ 12350 10351 6138 5218 METER CONTROL METER DRIVE Q301 UN4213AITA RELAY DRIVE DBCA R350 10K 88 gt lt 82 lt 5 Pe R355 330 C354 R353 330 C350 1500P A 9370 D359 1 2W100 165 14 5V 12201 A B TSA3000J AC SWITCH At lt 5 88 Y 5 6 lt Q201 UN4119TA SWITCHING Wm 2 Corn VOLUME CIRCUIT METER fave Board on page 60 ues Sree iiam gt 13 5 5 B R362 K B VR350 R361 2 METER Rch ADJ LAMP L LAMP R CIRCUIT CIRCUIT B P C 62 P C Board on page 61 SA TX50 Bl FL PANEL CIRCUIT Board page 61 90000 90000 12 374 5 5 0009090 00990 0990 JW909 JW911 1 903 4053 1 ABC ABC pessum KEY SELECTOR C932 0 1 Be ABC C936 1 R206 1 902 557 10 BU2092F LED DRIVE sav 4 4 22 e gt 9 SW CONT A B c 55 5917 55 5914 FMAUTO T S920 79 BAND MONO MEMORY Ls 5915 5918 8921 ox V ies E LL 2x 5916 2x 5919 0904 gee lt 235 UNA111AITA o POWER ON OFF DET gx o 55 2880 29 gt S908 gt SES SPEAKERS gs A JA
14. 124 NJM2115MTE1 161109 M 4 2 o 5 3 121109 1 2 121110 1 2 NJM2115MTE1 1110 Terminal guide on page 72 1c1110 1 2 121111 1 2 NJM2115MTE1 1111 Terminal guide on page 72 1111 1 2 I 50 S VIDEO JACK CIRCUIT J P C Board on 65 VIDEO TERMINAL CIRCUIT P C Board on page 65 C1411 R1306 1311 R1315 R1316 JK1401 Us IoP 100 f VCR1 OUT c ME 24V 12 01306 Y I 5 Q1303 1306 NO 2SA1309AQSTA MONITOR BUFFER AMP OUT A R1305 1 10 m R1314 75 63470 S VIDEO Lee Q1304 JK1402 0 57 VCR1 IN umo B E x M outs B F Md D EFGH JK1402 CN1308A CN1308 VDP IN CN1309A CN1309 A A 9 21 02 B EMM CN301 V Sw 9 Came es on page 53 4 5 58 22 JW301 8321 5 8 8 7 7 15 d ABCDE 2 ot o gt m 58 E 2 E SES ow g JK301 ABCDE A G E ES WOOFER SURROUND Lch SURROUND Rch TV IN JK1302 TV MONITOR OUT VDP 50 2 2 1 nee VIDEO 8 VIDEO SELECTOR a 1303 50922 VCR2 IN 5 R1307 R1312 75 100 c Q1301 502 2 17 gt
15. 2 12 0721 2 FAN OV OFF OV FAN ON 0 9V FAN ON 0 5 Q716 718 720 721 Q719 2SA1309AQSTA 25 1534 MOTOR DRIVE MOTOR DRIVE C734 R751 47K 6 3 220 0717 720 POWER SUPPLY CIRCUIT P C Board on page 67 POWER TRANSFORMER CIRCUIT P C Board on page 66 ONO T2 5A _ 5 SPEAKERS TERMINAL 1 CIRCUIT P C Board on page 66 0 000000 For EB GN TU 7 A p FRONT SPEAKERS B Lch 4 71 Rch SPEAKERS TERMINAL 2 Li CIRCUIT P C Board on page 66 DEED CENTER SPEAKERS SURROUND SPEAKERS E 4 FAN MOTOR ACIN 230 E EG GU 230 240 EB GN 50Hz SA TX50 MWiring Connection Diagram TRANSFORMER T P C B ME Bern LITITI 5 1 6 ae CN706 CN703 CN814 CN813 CN811 CN810 CN809 H E 707 jwzoi jw702 s SUPPLY P C B LAMP L P C B CN202 CN201 CN201A P C B 1 1 2 FL PANEL AREE JW202 cNoi5 7 ges 807 909 CN650 CN814A 813 CN811A CN810A 809 1 WHT BLK NOTE WHT BEC i suene seees ray BLK GRY C BLK E Bie AS PNK seers Pink PNK PNK 2 WHT White E viera S VIDEO JACK P C B 1 SOLDER SIDE CN1309A CN1308A
16. 51 8 2 8 5 5 8 e Q905 906 5 8 m Switching 82 30 47 32 17 56 31 6 7 42 162 Q 37 438 38 46 04 3 28 51 Q 771 gt p gt 5 8 8 n 9 8 B k 58 8 o 9 o a a o 9 5 5 iu gt lt 5 5 b 8 amp 5 2 g 8 2 lt n 8 LC8A028B5C46 1 901 MICROCOMPUTER 5 2 2 D 2 9 9 2 9 O 1 Q902 903 ReseU regulator From 39 Power TC4053BF Transformer 12903 FL901 KEY SELECTOR FL DISPLAY S801 904 TREBLE 5905 909 5910 913 914 916 917 919 920 922 50 TC9332F 022 101104 111047 42 44 T 1 3 6 11 53 60 DIGITAL SIGNAL PROCESSOR 43 12 5 52 OO lt lt lt es Offset RAM onfficien icient ET Delay RAM address Deiay generator 35 36 p Interface bus SCLK ple Tyco 132 68 y Data bus T Wark register bus Program counter generator Serial Data VO circuit Program ROM VCO OSC circuit 38 14 34 52 RST 45 15 3740 39 18 17 16 15 37 40 39 38 Q O0 O0 O 23 22 50 VCO OSC circuit o Serial Data Timing VO circuit generator m DSPRST a 1
17. PU PARALLEL REGISTER 4 C604 R604 50 047 1K 9 x S 88 i 28 md R663 5 R632 Te gt 8 1W10 T 12606 83310 Bem 52 ELECTRONIC VOL C605 R605 1 50V3 3 1K B QS 5 SEL 28 21 88 10603 M5218AP BUFFER AMP EN SENALTO PARALLEL REGISTER C606 R606 C654 C656 ud 2 0 503 3 1K 100P 1500P A H ox 3584 v 8 C678 8 Br 288 Pe 88 _ E EI 111 85 Ber 88 fito 581 IK Ul MAIN CIRCUIT P C Board on pages 68 69 Notes gt FMsignal zzzi Surround speaker drive signal Lch gt Center speaker drive signal gt signal gt Subwoofer speaker drive signal C501 R501 200000 t Ow 5 gs 88 10501 UPC4570C TONE AMP con 8502 16947 279 A 5 88 1607 5218 C636 R636 50 0 47 1 5 a e 82 T 11220 C638 R652 50 3 3 1K ex SET 88 0608 5218 BUFFER C509 16 4 7 12502 9184 TONE CONTROL 527 12K C657 R643 100 1 5K Soo gt C O 127V ov 0658 C680 100 0 01 R644 1 12 10503 5218 BUFFER AMP R646 1 5 127V R648 C664
18. i AM IF AMP 5 jd DET AMOSC MIX MPX Q107 108 BUFFER AMP Q103 104 FM AM MW LW loop filter HCTR 164 LC7218 15 LOTR FREQUENCY Y 2 SYNTHESIZER E 8 8 E counter Q106 234 Vss Power 682 supply 50 Signal line gt FM signal 000 OSC signal AM MW LW signal 11 OSC signal Rec out signal indicates pin No of right channel TC9163N T n oi UPC4570C TV 7 Lch TC9164N INPUT SELECTOR Q908 909 DATA D917 922 5 10 LC8A028B5C46 BU2092F VDD MICROCOMPUTER L E D DRIVE 8 64 54 55 E Fi CF901 6MHz 2901 REMOTE SENSOR x SA TX50 eSignalline gt gt signal AM MW LW signal Subwoofer signal Z2 Surround speaker drive signal Center speaker drive signal AK5340B VS 1C1103 4 A D CONVERTER 15 NJM2115MT1 254 101101 if M pe 31b NJM2115MT1 Serial Output Interface Decimation Filter Decimation Filter Calibration 1 os KT GA 11 9 10 24 19 Filter amp an ee 4 01101 9901 LED D drive D916 STANDBY 6 e E m o E 8 8 g 5 5 5
19. C898 1 5K 12K 0 082 A 2 7K R1025 R1029 R1519 1 5K 4 2K CN706 3 45 40 5 o 4 8 2 0705 1 c 2SB621AQRSTA 3 o 3 REGULATOR MR724 TR NE p 11244680 1 2W680 1 2W680 o f 8 49714 opum t 4 28 3840 8 1 REGULATOR T 034 Q Lari 0706 25 3940 05 REGULATOR 0706 Q H 3 5 25 28 58 5 i s e 14V 1 1 0823 82 AQ 2SD2374PQAU A Q708 2SB1548PQAU REGULATOR REGULATOR AQ710 712 2SC3311AQSTA 1 REGULATOR 9 65 CN701 eto mo 3 LL i AQ711 713 Es i mo 309 o8 55 49 D829 165 5830 5 MA165TA 0701 702 2SD2374PQAU REGULATOR 254700 R1048 180K 1 gt EE B 0725 728 26 AQ 703 2903311AQSTA REGULATOR D836 165 D701 MA4030MTA 702 16V10 Notes gt FMsignal gt Surround speaker drive signal Lch gt signal gt Center speaker drive signal N ACIN CIRCUIT P C Board on page 66 14 9V Orr OV Q719 12 FAN OFP QV OFF 0 8V 1 9 4 FAN ON 0 2 FAN OFF OV FAN 9
20. N810 CIRCUIT CN811 27 Pp on page 53 on page 53 FL901 RSL 0224 F FL DISPLAY LL LE LE EE ABCDEFGH cett 35V10 Q901 2SA1309AQSTA 8 LED DRIVE 5828 p 165 mx BENE gt Y han For EG GN GU 47K areas lt G erras Q905 UN4211AITA S SWITCHING S B 0909 910 GRN 52 nous c 5 5 8 tube LC8A028B5C46 T 2ms H MICROCOMPUTER pat J Terminal guide 1232 on page 71 uim Sov 1 1 Q908 909 UN4213AITA SWITCHING 1 01 pem c Vio ar 0914 1902 0915 155291 100 1855291 B Q909 ov ov 5 4 0910 0907 910 UN4113AITA SWITCHING 55 88 T 83 l z JW1103 00000900 5 444 BCA 902 Q903 298A1309AQSTA UN4214AITA nA To DIGITAL REAVATOR PERET M TGSTA CIRCUIT CN1103 on page 48 Sos SA TX50 Notes gt FM signal gt signal To EIMAIN METER UNITIRSEDDOGA 813 CIRCUIT CN814 on page 56 on page 56 a p A 0358 65
21. ORDER NO AD9607155C8 Service Manual Receiver 2 Home THX control receiver S A TX5 0 LUCASFILM POR 07a E 0 Manufactured under license from Lucasfilm Ltd U S patent numbers 5 043 970 5 189 703 and 5 222 059 Foreign patents pending Lucasfilm THX and Home THX Cinema are registered trademarks of Lucasfilm Ltd Colour B Black Type Area Suffix for Es K EG Germany and Italy Asia Middle Near 7 Mea t GU East and Africa Latin duse Diu America Specifications DIN 45 500 Manufactured under license from Dolby Laboratories Licensing Corporation Additionally licensed under one or more of the TOL following patents U S numbers 3 632 886 3 7 56 792 and Power output 3 959 590 Canada numbers 1 004 603 1 037 877 DIN 1 kHz T H D 1 2X130 W 60 Dolby and the double D symbol are trademarks of Dolby 20 Hz 20 kHz continuous power output both Laboratories Licensing Corporation channels driven 2X125 W 6 Q Total harmonic distortion rated power at 20 Hz 20 kHz 0 05 6 FM TUNER SECTION half power at 1 kHz 0 03 6 0 Frequency range 87 50 108 00 MHz Power output at the Dolby Pro Logic operation Sensitivity DIN 1 kHz T H D 1 S N 30 dB 1 5 uV 75 Q Front 2X120 W 6 Q S N 26 dB 1 3 uV 75 Center 120 W 6 0 S N 20 dB 1 2 uV 75 Q Surround 2 100 W 6 0 IHF usable sensitivity 1 5 pV 75
22. SUBWOOFER Buffer amp Q807 808 811 2 2 5 G3 69 amp 88 7 6 2 e Q834 O Relay drive DECODER POWER ANP 5218 SURROUND SURROUND AN gt lt SURROUND IIIS Pu SPEAKERS Buffer amp 20 9 9 o weng gt Q812 839 Q559 821 822 840 POWER AMP RSN36S5A 1 802 LOW IMP AFMUTE SA TX50 2 22 FRONT mE 13645 SPEAKERS UPC4570C M5218AP DECODER POWER Q813 814 837 5 OUTPUT INPUT FRONT 815 816 838 gt 10501 12503 POWER RSN36S5A gt 4 801 gt lt n Buffer amp D RL803 Q 2 edu 18 11 AL 6 A Relay drive Analog Switch Q TONE CONTROL gt lt 1 502 RL804 9184 0831 Code det circuit 20 bit shift register Level Shift Relay drive PIC SPA RELAY SPB RELAY HEAD PHONES Q801 804 METER 5218 0716 721 1C351 Meter Fan motor drive 82 AN T 5 METER CONTROL S 3 VR351 350 POWER METER perd BA6138 T702 D 9 4 ral RELAYOUT 65 713 9201 D Q705 S F1 TSA3000J 781 05 D oro 16201 AC SWITCH 86 olv 687 Q709 710 712 AC N ams 5 M O Q708 711 713 AV
23. al gt Surround Speaker drive signal Lch Center Speaker drive signal ex signal gt Subwoofer speaker drive signal AAIC801 RSN36S5A POWER FRONT P 0831 832 D UN4119TA 5515 RELAY DRIVE P NN A R1091 61720110 c ER 88 88 cce lt ARI L 854 C865 15 12W10 1 2W47 5878 isp i M I ayes a Pe ded 7 un R891 1 2W47 ne 22 gS 4 8 5 2x Sz Sz og o8 n 5 5 R888 12 ar 4 5 2686 C869 0875 R887 8 52 12 1K 1000P 1000P 1K 58 55 22 ee H 188188 477 D805 807 809 811 E 5 807 809 811 n D813 816 818 820 A CENTER 167 21098 C848 8857 R889 1 2W47 0804 4062 N ox inxs 802 2235 R1055 91056 259 2 2 1 POWER 53V av SURROUND B Q833 834 8 0 4119 83 RELAY DRIVE Er c 4 wh et BS 83 584 SE x 2W47 lt lt FE 3 85 852 gue 55 x lt lt 0806 808 810 812 D814 817 819 821 167 5 MAIN CIRCUIT P C Board on pages 68 69 81026 81518
24. iK 1000 C682 R650 100P 1 5K UN4213AITA SWITCHING Q551 UN4213AITA SWITCHING CN815A C637 50 3 3 A 49 0550 UNA113AITA AW 100 SWITCHING 1004H R532 47 0556 MATOOATA 4 0553 558 2SD1915FTA SWITCHING Passe UN4115TA SWITCHING SA TX50 SA TX50 JK804 R1083 DECODER OUTPUT FRONT Lch POWER AMP INPUT FRONT Lch wool FRONT Rch POWER AMP INPUT T FRONT Ach R1081 818 A 1 POWER AMP INPUT CENTER s R1083 8 1 DECODER 23 OUTPUT SURROUND Lch POWER INPUT SURROUND O H Lch e R1082 C815 DECODER 10 SURROUND Rch POWER AMP INPUT SURROUND Rch gt JK805 R1080 822 DECODER OUTPUT SUBWOOFER Apo MA4030MTA R815 1 6K 0805 UN4213AITA SWITCHING Q806 808 UN4113AITA SWITCHING R830 470 Q817 18V 0807 SWITCHING Q810 811 UN4210TA SWITCHING 40 Q813 815 817 Q819 821 2SA1309AQSTA SWITCHING Q814 816 818 0820 822 28C3311AQSTA SWITCHING Q812 UN4210TA SWITCHING 88 82 0837 841 T 25 3311 5 SWITCHING 9x 85 ABCDEFG Bl FL PANEL CIRCUIT 814 To Bl FL PANEL CIRCUIT CN813A on page 45 on page 45 SA TX50 Notes FM sign
25. n page 53 IN OUT TERMINAL CIRCUIT P C Board on page 67 R425 10K SIGNAL Lch c E G 1 M FOR 1K 62e De 60 19 18 Omb DATA IC401 TC9163N INPUT SELECTOR TAPE 10402 TC9164N INPUT SELECTOR VDP VDPGCH FRONT IN R414 1K Rch L JK404 TV IN R416 aah 1K Rech N C446 0 01 2401 US CN802 CN803 1 oPERATION 2 CIRCUIT JW401 ABC on page 46 2 MAIN CIRCUIT P C Board A 52 pages 68 69 E801 J 9 88 ef il I Y Y EC 1 Ed 88 iz CN1101B 123 0000000 228 28599 558 5588 lll DIGITAL ViDEO CIRCUIT JW1101 TERMINAL TUNER TUNER on page 47 CIRCUIT CN1307 CIRCUIT CN101 CIRCUIT CN102 on page 51 on pages 41 43 on pages 41 43 Notes gt FM signal AM signal C302 16710 C303 16 10 1C301 1 TC 14 9V SIGNAL SELECTOR SA TX50 gt Center speaker drive signal gt Rec out signal Surround speaker drive signal Lch gt Subwoofer Speaker drive signal 1C403 UPC4570C BUFFER AMP 54 ge 85 38 ez 9 A 1C404 AIC405 EET 78105 791 05 REGULATOR REGULATOR A CB NE 5 2 14 6 4 821 85 58 T 92 881 58 gt A of 14V B
26. tion and OVER LOAD is displayed on the FL display check the fan motor and its driving circuit OVERLOAD is displayed on the FL display Is the air cooling path blocked or the fan motor jammed by any external obstacle NO Remove the fan from the unit YES Remove the obstacle Is the fan motor s DC resistance 20 30Q 2 NO Fan motor failure Short circuit DC resistance below 50 Open circuit DC resistance over 1kQ YES Reinstall the fan on the unit Check the integrity of Q716 Q719 and the fan motor driving circuit See Fig 1 terminal voltage of Q716 Q719 normal in both active and inactive states of the fan motor See table 1 NO N AC IN CIRCUIT P C Board on page 66 1 8 4 EN MET m A 149 24 16 oe FAN OV FAN ON 0 5V Q716 718 720 721 Q719 2SA1309AQSTA 25 1534 MOTOR DRIVE MOTOR DRIVE Q719 92v Table 1 Is an audio signal present at pins D and of IC801 or pins D and of IC802 or pin 7 of IC803 NO The power IC 10801 10802 IC803 is defective YES The fan motor power ICs and fan driver are functioning normally SA TX50 Diagram BA7625 KEETE VIDEO SELECTOR VCR3 video iN 6 Logical circuit 16 5 51 etH Q 013014 m VDP VDP 7 9
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