Sansui TU-S77AMX, Service Manual

Page 1: ...to noise ratio at 85 dBf Mono 90 dB Stereo 84 dB Distortion at 65 dBf Mono less than 0 015 at 1 000 Hz Stereo less than 0 02 at 1 000 Hz Alternate channel selectivity at 400 kHz NARROW 60 dB Capture...

Page 2: ...boards are provided by orders 3 Since some of capacitors and resistors are omitted from parts lists in this service manual refer to the Common Parts List for capacitors resistors which was issued on...

Page 3: ...R2 Ind k 1 I C LD1 0 GAIN FM Strength dO1 L6 FM B jj L OCAL Ind sLDII eVRi S1 2 1 9 18 16 3 c LAl245 B I WIDE __ J AM B AM Strength Signal eVR2 MODE 0 s Stop Signal B LOCKED Ind sLD13 1a IDECORDER I s...

Page 4: ...ceI I1 9KHz Phase Shifter 45 I AA W1 I9KHz 90 w1 T Tw1 ICII K 12 d lCI 2 ICII 1 1 IC 12 304KHz C 9 V Q I Vl X Q 1 1 N I Walsh Wove w1 t52K 761 38K Logic Circuit 0 ICII Walsh Wove Generotor etc N zt 21...

Page 5: ...I 1 09__ __ I I __ _ ___ 7 I I I I I I I I I I I I I sv I BPF TU S77AMX I I I I I I I I I I I I I evR 5Hz o_J L I AMStereo lndi _____ _______ _ J BPF t 2S U eVRJC I I BPF vR r5Ht 1112Jl eVR117 B Pi 1...

Page 6: ...Make symmetrical S curve Discriminator 1 No Input Between TPl TP2 dT2 G DC 0V 30mV Repeat procedures Coil Adj Accross dR34 F 4372 as stated in subject In case of F 4372 1 2 using Dist DC Volt Meter m...

Page 7: ...tween dTP3 Earth dl101 304 000kHz above F 4375 F 4375 Frequency Counter 2 Pilot Offset Adj 1 Same as above Same as Between dTP2 dTPS dVR104 DC 0V 0 1V above near dVRt04 F 4375 F 4375 DC Voll Meter 2 9...

Page 8: ...DE lkHz Pilot VTVM SCOPE F 4375 indication above t 100 MOD STEREO SG 2 98MHz ANT Input Same as OUTPUT L CH Read the indication IF BAND WIDE 65dBf 59 8dB above VTVM SCOPE on VTVM Confrim L_ R CH FM SSC...

Page 9: ...SSG 6 LOCKED Level Adj 1000kHz or Same as LOCKED LED eVR2 6 lndfcator LED STEREO 999kHz ANT Input above F 4372 light up 1 111 I II C c J D c J S0dB 400Hz 30 n oc ED 11 MOD AM SSG I I 7 Auto Stop Level...

Page 10: ...rd Stock No 00783801 Component side A B C 1 2 3 4 i JP18 TU S77AMX Parts Lisi F Parts No Transistor d01 d02 d06 d07 d08 d09 d010 d011 d012 d013 d014 d015 d016 d017 d018 FET dFTl dFT2 IC dlCl dlC2 dlC3...

Page 11: ...2SK192A Y or 46086000 1S1588TP 3 or 46086000 1S1588TP 3 or 46393001 2SK192A GR 011 03117600 1S2473T77 dT4 03117600 1S2473T77 or 46086000 1S I588TP 3 or 46086000 1S1588TP 3 IC f012 03117600 1S2473T77 d...

Page 12: ...www SteamPoweredRadio Com 3 2 F 4375 MPX Circuit Component side A 1 I 2 I 3 4 9 Board cstock No 00787701 0 N B TU S77AMX C 0 I ii 0 C 0 0 Cl44 1 0 r C21 5 e AN 0 1 1 I AC 3V...

Page 13: ...r 46643707 2SK246 BL dS2 07251 100 Slide SW FM de entacess IC dlC 16723700 NJM14960 IC dlC6 46579100 M5219L flC5 03604100 TC401 1P dlC7 46 23700 NJM1496D dlC8 03607700 NJM45580 Transistor dlC9 4672370...

Page 14: ...07250900 TLG 123A sS4 46708100 Push SW PRESET STATION 1 or 46470300 SEL2410E sS5 46708100 Push SW PRESET STATION 2 sLD3 07250900 TLG 123A sS6 46708100 Push SW PRESET STATION 3 or 46470300 SEL2410E sS...

Page 15: ...01 2SC2785 e0114 07299601 2SA1115 or 46392201 2SA1175 e01 17 07299701 2SC2603 or 46392101 2SC2785 IC elC101 46723700 NJM14960 elC102 46723700 NJM 14960 e1Cl03 46147700 M5218L elC104 46147700 M5218L el...

Page 16: ...ide Po1n1 k Parts No eD132 e0133 e0134 e0135 e0136 e0137 eD138 e0139 eD140 eC156 eC157 eC159 eC160 eC161 eC162 eC163 eC164 eC165 eC166 eC171 eC173 eVR109 eVRl 10 eVRl 11 eVR 112 eVR113 eVRl 14 eVR1 16...

Page 17: ...dVR101fl ____J dVR6 Parts List To View Description Parts No Stock No Description Front Panel Ass y 1 38004700 Power Supply Cord Bonnet XX UL CSA Push SW FM AM MEMORY 2 47163600 AC Cord Cover DOWN UP...

Page 18: ...fflt F ltmlMytorl 8P 81 PONr ltClfolyht i 11 J IF UIHtH Ol 1MhOltd P pf R SIS10RS 0 Hon l IIOllll l IOl lt TJl t Alt lll Ohl fl1 1 4 tttrs 5 loltr11nn 1 1t IH1 0111er u 1101 4 10 M wn o t D C 1 01 091...

Page 19: ...1J1u1 ho 11111n1 vcmlu llo Anderungen dte dem technt heo Fortschntt d enP n bfe1ben vorbehalten Sw11CH 6 U 1 1n1 IS2 L RI ht df tt IGCUI dYRK O d IRIOIL R dVRJ02L R dVRt03l R dVAt06 dVRl e dVAI05 CAP...

Page 20: ...change without notice for improvement La presention et les spectficahons soot suscept1bles d etre modlftees sans prt av1s par suites cfamehorations eventuelles Andef ungen die dem technischen Fortsch...

Page 21: ...O 8 16 Voo 15 RESETe 1 4 04e 13 03e 1 2 02e 11 Ole 10 ENABLEe 9 CLOCKe I 2 3 4 5 6 7 B 9 1 0 II 1 2 1 3 14 1 5 16 17 18 I NJM1496 Double Balanced Mixen IC CARRIER INPUT SIGNAL INPUT BIAS oUTPUT OUTPUT...

Page 22: ...onal Amp IC A OUT s v 7 B OUT I V 4 S B IN 17 TU S77AMX LA1247 AM Tuner IC BA6125 L E O Drive IC Vc l Vc2 Vc3 Vc4 GND Vc6 AMP IN OUT MSM4030RS Quad EXOR IC A B OUT L L L H L H L H H H H L TC4016 TC406...

Page 23: ...received frequency digitally and a timing signal The data fed to the driver TD6301 P for displaying a static frequency and the timing signal are outputted once only when the frequency Is updated in s...

Page 24: ...n the arrow direc tion D 3 Remove F 4377 circuit board 4 Remove the hooks J of 1he side panel from front panel and then pull it to the arrow direc1ion Q 10 remove the side panel L R 5 Remove F 4367 Ci...

Page 25: ...98000 14 1 Izumi 2 chome Suginami ku Tokyo 168 Japan Description F type Connector Male FM Antenna AM Loop Antenna Pin Plug Cord Operating Instruction PHONE 03 324 8891 TELEX 232 2076 1 nternational Di...