Samsung MM-77 Service Manual Download

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Summary of Contents for MM-77

Page 1: ...NG ecceseeeeeeeees 18 26 FAQUUSUMIENT siasrmiccihddiariereds 27 32 8 Block diagram ccessseseseees 33 34 a SSE vec 9 Exploded view parts list 35 41 10 Schematic diagram 42 44 11 PCB Pattern and Marking...

Page 2: ...aa nakymatonta silmille vaarallista lasersateilya CAUTION Invisible laser radiation when door is open and interlocks defeate Avoid exposure to beam Laser diode specification Optical pick up Material G...

Page 3: ...rrent for App liances and Underwriters Laboratories UL 1270 40 7 With the instrument s AC switch first in the ON positin and then in the OFF position measure from a known earth ground metal waterpipe...

Page 4: ...in all areas for pinched out of place or frayed wiring Do not change spacing between a component and the printed circuit board Check the AC power cord for damage MM 77 1 1 10 Components parts and or w...

Page 5: ...place where over heating or shock is likely to occur can be found short terminal SOH91C1 CAR walkman SOH91VI LDP MM 77 2 1 6 Handling the optical pick up The laser diode in the optical pick up may suf...

Page 6: ...vice precautions are indicated or printed on the cabinet chassis or components When servicing follow the printed or indicated service precautions and service materials 3 The components used in the uni...

Page 7: ...mbly 3 Use only a grounded tip soldering iron to solder or unsolder ESD devices 4 Use only an anti static solder removal device Some solder removal devices not classified as anti static can generate e...

Page 8: ...small lead 11 A defective trimming resistor cannot be adjusted externally Replace with an ordinary variable resistor 12 It is important to inspect the work with a magnifier Check after installing col...

Page 9: ...g it Melt thin solder between the tip and part so that if flows into the part contact 5 Check work quality with a magnifier FIG 5 MM 77 3 5 Chip VRs Chip Trimmer Capacitors Diodes and Tr 3 5 1 Kind of...

Page 10: ...7 airblow 4 Engage the IC removing tool Use the airblow to preheat the IC for about 5 seconds then heat with the nozzle until the IC remover lifts the part from the board ea FIG 7 MM 77 3 6 3 Install...

Page 11: ...ah wa anndutonnabuestodeane sekaback 522 1611 KHz AZPWS ATG SO ri STEIBY cases as exe iis c2t eel cautarsussdeseessr ute Oe lian Heseosnee tebe dane sat yaaadete a tedtadgieiniatated dae axel ea tce e...

Page 12: ...SE SELECTION FOR COMPACT DISC COMPARTME COMPACT DISC SYNCHRONISED RECORD CD RECORD COUNTER RESET CASSETTE ONLY SOUND CUT OFF BASS AMPLIFICATION VOLUME RECORD STOP CASSETTE ONLY TIMER SWITCH ON AND OFF...

Page 13: ...R TERMINALS OPTION AM AERIAL CONNECTOR TERMINALS REAT CUT ANTI PARASITE SWITCH OPTION AUXILIARY SOURCE CONNECTORS FM AERIAL CONNECTOR TERMINALS LOUDSPEAKER CONNECTOR TERMINALS VOLTAGE SELECTOR OPTION...

Page 14: ...M PLAYBACK TRACK REPEAT RADIO RECEPTION SELECTION FREQUENCY BAND SELECTION CHECK TIMER ON OFF SLEEP CLOCK AUTOMATIC SWITCH OFF TIMER CHECK CLOCK SETTING TIMER SWITCH ON AND OFF SOUND OUT OFF FUNCTION...

Page 15: ...pull itout 4 1 2 Pull its rear part out backward horizontally as shown in the Fig 1 4 3 2 Remove one screw of 3 another one screw of and then pull CD Mecha of out 4 2 How to disassemble tuner PCB 4 4...

Page 16: ...4 5 How to disassemble the front of cabinet Fig 5 4 5 1 Remove three screws of and then pull Cabinet bottom of out backward MM 77 15...

Page 17: ...ET 13 XT 1 14 XT 2 15 vss GND 16 CF 1 8MHz 17 CF 2 8MHz 18 VDD 19 P8 0 KEY 1 A D KEY INPUT1 20 1 KEY 2 I A D KEY INPUT2 21 2 EQ R EQ LEVEL INPUT RIGHT 22 3 EQ L EQ LEVEL INPUT LEFT 23 4 AMPS IN TAPE A...

Page 18: ...77 4 STEREO I STEREO CHECK 78 5 SD 79 6 MO ST O MONO STEREO 80 7 STOUT 81 P3 0 TUN_DAT oO TUNER DATA 82 1 TUN_CLK Oo TUNER CLOCK 83 2 TUN_CE oO TUNER CE 84 3 STRO oO 85 4 REC oO TAPE RECORD 86 5 MOTO...

Page 19: ...c2 asp rea we VFE R2 R1 x V2 V1 5 4 V2 V1 FE Bias This FOCUS ERROR voltage is sent to FOCUS SERVO circuit to maintain optimum focusing Vcc oe GND 3 FOCUS SERVO SYSTEM KA9220 NIC9220 The diagram of Fo...

Page 20: ...ues and feed back resistance of pin47 Track jump max Voltage TM3 TM4 current x feedback resistance ISET VREG O 56K SLED DRIVER FWD or REV sled kick is carried out when TM5 of TMG is ON and the peak vo...

Page 21: ...Is more than 5V caught in RIC2 7805 Replace RIC2 7805 Check voltage of UIC1 MICOM B 4 5 7 no 18 47 90 Is oscillation of UX101 X tal Qkay 8 4672MHZ Replace 8 4672MHz UX101 X tal Check voltage Check RQ3...

Page 22: ...the MICOM PIN No 71 POWER SENSOR becomes HIGH Check the 3V between AlC1 2 PINS andB 7 Replace MICOM Replace AQ4 A733 MUTE OFF ls Mute selected Check the UIC 1 pin No 7 EQ Collector becomes HIGH Repla...

Page 23: ...11V AM OV Check HIC1 LM7000 FM AM BAND switching FM VT for HQ4 1 7V 7 5V HQ1 2 4 CONTROL ok AM VT for TP3 0 9V 8 5V Check the HQ1 2 3 CONTROL ok Check HIC1 FM Oscillator PACK No 8 AM Oscillator No 29...

Page 24: ...y accurately Check AC voltage of P T secondary Check Voltage AC 4 2V Xx Between both gray between both ends of Between both gray FLT HITER ends 4 2V AC RD7 IN 4002 RZD2 27V ZENER Check voltage of UIC...

Page 25: ...ving element and CLOSE S W CLOSE condition 0 eee i os Check oscillation of ceramic resonator 16 93MHz NXF100 is Focus Search done properly a el oa ees cers tant fore j ey ee i Le ae OE x ae a Does Las...

Page 26: ...2 power Check waveform of NIC9282 pins 19 20 xX _ ____y Check waveform Check NIC9270 of NIC9282 pins power IC pin 2 19 connection 7 Check waveform i Check wire of NCW101 connection L out R out l nine...

Page 27: ...BIAS OSC Oscillate RECORD BIAS 85KHz JL2 CHECK Osc Frequency 85KHz When inoperative JO5 6 7 check i R P SWITCHING Convert PLAY RECORD AMPS JiC2 LA2010 AMPS AUTO MUSIC PROGRAM SEARCH function Check for...

Page 28: ...75Q or 3002 dummy 1KHz 40KHz DEV 3 Oscilloscope 4 VITVM 5 AM Loop antenna 6 Frequency Counter 7 Dummy load 6Q 8 DC voltmeter 7 1 2 Importants 1 Check the power source first 2 Check function and band s...

Page 29: ...VR3 If L CH is input R CH seperation 60dB should be minimum and visa versa NHigh coverage and tracking adjustment are not required FM SET output antenna GND terminal FM Signal Generator speaker oscill...

Page 30: ...1 adjustment Maximum output 6 1404KHz 1404KHz ITC1 aos 7 Repeat step 5 and 6 several times 8 FIG 4 999KHz 999KHz IVR2 QUARTZ LOCK 58dB is shown on F L T 3 BAND FM MW LW MW band Refer to 2 band section...

Page 31: ...ignal test tape MTT 113CN or equivalent 8KHz signal is recorded Azimuth 7 2 2 Location of adjustment points parts side D UVRS1 NOR SPEED 7 2 3 Adjustment procedure 1 Tape speed Contection Preparation...

Page 32: ...utput and DECK same phase of L R CH Fix the screw 2 Record frequency STEP ITEM CONTECTION PREPARATION ADJUSTMENT POINT RESULT REMARK iz 1 BIAS OSC Push REC switch JL2 85kHz JC26 Frequency MTT 5512 in...

Page 33: ...IX EQ VOLUME IC less 15 2 4 Nog _ NN L wil ie a EIci A arci St _____sls etc2 a _ Bish 4 HL i Te9154ae ao 13 A i AUX 7 KA42558S aes eee 2 a ee Se nn sre eeke 7 is r 4 FUNCTION af neat ar a POWER AMP a...

Page 34: ...connector of the oscilloscope to VR and disconnector to TP1 2 Load and play the disc 3 While the disc is running adjust the gain with NVR1703 as shown in the following figure Low frequency High freque...

Page 35: ...a B 8 a v3 Zz a Yv 9 Zz g 2 6 k 5 rs oO va rol oO 7 NCw101 SCW1 SCW3 P U IN 70 71 LIMIT S W 74 75 76 77 32 38 11 12 13 25 31 LOCK SMEF WDCH SMON SMSD ASSP NIC 9220 KA9220 27 28 29 OPEN CLOSE MOTOR 30...

Page 36: ...16 15214 506 011 DAMPER ASSY POM PD790 17 13013 0260 00 BRAKET DECK L MM 77 T1 0 SBHG 18 17159 0038 00 DECK CASSETTE CRF452 19 13013 0261 00 BRAKET DECK R MM 77 T1 0 SBHG 20 19113 0017 01 ASSY LACTCH...

Page 37: ...a n DECK PCB MAIN PCB TUNER PCB DECK CASSETTE FRONT PCB CONTROL PCB 9 1 2 Exploded view 36...

Page 38: ...1C GEAR FF 22 222 4048 ASSY ARM FR 22 093 4061 ARM BRAKE 22 239 3028 ASSY SUB REEL R 22 093 4151 ARM TRIGER 22 268 3008 ee Se ee 9 Remark 10000 611 031 10000 611 035 10000 611 051 10000 611 039 10000...

Page 39: ...LEY MOTOR POM D4 BLK CMS M1 1 11 13602 0001 00 TRAY M1 ABS BLK CMS M1 1 12 11494 0001 00 BELT PULLEY NEOPLEN FR W1 5 11 5 78 8 CMS CR1 1 13 19129 0357 01 ASS Y CD PCB G3A8 1 CD 1 14 13070 046 125 CONN...

Page 40: ...9 3 2 CD MECHA Exploded view CMS P5M6C 39 ug MM 77...

Page 41: ...ication Q ty Remark DECK CD BASIC 1 a CHASSIS DECK M CMSA30 POM M90 44 1 COVER GEAR CMS V30 BLK ABS GEAR A CMS V30 M0 3 Z13 SP POM GEAR B CMS V30 MO0 3 213 SP POM GEAR C CMS V30 M0 3 Z16 Z90 SP POM SH...

Page 42: ...OW REMOCON RCD1650 EXP PC 1 5 14082 0642 01 KNOB RUBBER MM 77 GRAY SILCON 1 6 12724 0189 00 SPRING A MM 77 STS PI0 6 CD NI C 1 7 12724 0190 00 SPRING B MM 77 STS PI0 6 CS NI C 1 8 12724 0191 00 SPRING...

Page 43: ...gtm INIA rec FEC EC OoTit agin INL AMP aL BUR 10 EATS rae y ie 20 AROS 3 0 16 ras BIS tex ER er Hom mH vCWa tok MCWe O60 Le OnE worn comes foorion sa ne10 MIC JACK MIG MIXING Des OE VR BUFFER AMP Etc2...

Page 44: ...00K nk Z LONI ucWw71O ul Peo SI SLCHI i ioe 38 uaa 2 A148 F 4 a s ju0103 18853 H _ eee 8 Bed ry ry xl en bo 3g LoeTIo oe aie o 8 re 3 xe tale 5 8 sls ge eg 8 wien gx g iez g 3S Sige Se RSE 8 Ene 2S is...

Page 45: ...LE LE a a A 2 i mi 2 a3 5 it ie 5 ce 4 s RE arn ae es unica gre eee Ny Sve a ae q Lode oy AR L aa ge H Fy i the d o a Sad ala OC nk x4 oop of HR QO ee ve mel UL e ae a8 aa ig m 4 H g y 3 WY wb Loi BS...

Page 46: ...C3 RD3 D1 RD4 D1 RDS D1 RD6 D1 RD7 E1 RDB IE1 RDS 101 R201 E1 RZD2 FO RZD3 E2 RZD4 D2 RZD5 E2 RZD6 FI R2ZD7 E1 R208 2 UDI F3 HER TR ORK AQIL B2 AQIR B2 AQ2 B2 AQ4 B3 BQt 1A7 BQ2 B7 BQ3L C7 BQ3R C6 Bas...

Page 47: ...XX TR XXX XX IC WAFER XXX UDI02 DO Uatot CO USWI11 A0 ae a eee DIODE XX XX TR K XX ICRWAFER X UDI04 C1 UQ103 B2 UDIGS Et UQi04 B2 re ae UD50 AQ UQ1 BO USWI AT UD51 A0 UQ2 BI USW2 BI UD52 A2 vaQ3 B1 US...

Page 48: ...BWAFER XXX uswidt EQ USWI02 EO USwi03 BO USWI04 AQ USWI05 AQ USWIOE CO USWI107 CO USW108 DO USW109 D0 USWI10 BO UWT AO 11 5 Power section RIW200 ciessotusctcieds RF200 Ti 25AL 250V_ oo BTOM A XK CRWAF...

Page 49: ...11 8 CD section 11 8 1 Top part 11 8 2 Bottom part MM 77 ae...

Page 50: ...W9 Eos Ld Re Grl MCW6 perreres a CD PCB CWE CW7 MAIN PCB BLK BLU GRY 8 ee e POWER PCB UU AC CORD MM 77 RANS OWE SCREW TUNER PCB eB _ wi S S ql 7 CONTROL PCB 2 eer 3 UCWI 7 B SG as FUNCT TON s JCW2 oe...

Page 51: ...13 IC TR internal diagram 13 1 Main section LC 866224 p COM UIC 1 SEG MENT 1 16 LC 866224 3 cLockiosc G cockiosc LA2010 AMPS IC JIC 2 vect vece OUT O DET RESET AMP OUTPUT MM 77 50...

Page 52: ...L OUT1 15 R OUT1 L IN1 14 R IN1 A GND 4 iA GND L IN2 5 12 R IN2 L OUT2 6 11 R OUT2 STL7 10 DATA GND 8 91 CK VDD GND VSS O DATA 10 __ 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 i L IN1 3 A SW 3 A SW Lr...

Page 53: ...KA4558S OP AMP QIC2 3 EIC2 3 5 MIC1 Q S a LA1851N FM AM IF IC 11C1 4 2 AM MIX ae eel AM AM aapnom F F EF Zz FF RF Las pH LEE ee te MM 77 52...

Page 54: ...60615 14 13 12 11 10 oo 1 2 3 4 5 6 PA 8 OY 2Y Y COM 3Y 1Y 1NH Vee Vss 16 0 Vpp hAh6e isavel Binary to A100 1 of 4 Decoder Convener with Inhibit 8 Vss 7 O VEE XO 12 o X1 140 ES to 13 x X2 150 a ars X3...

Page 55: ...BIAS S oe e PB BIAS PLAYBACK MODE CONTROL O REC GND an 12 REC IN 1 sie S 11 REC NF 1 NF 1 ep a 100K 7 8 _00 PB PB IN 1 AB PBGNDMUTE REC NF 1 SW IN 1 OUT 1 LNM7000 HIC1 sei Reference Divide Phase Defec...

Page 56: ...PPER SOA INP PLAY INP MUTE LQUER SOA Pe ee Us A eS epee e TR TR IC 3 KA7805 OUT KSD73 Y E KSA 614 Y _ TR 1 2 3 KSC 2331 KSR 1003 KSR 1009 E C B KSA 928A KSR 2003 KSC 945 KSA 733 KSB 564 KSC 12221 E B...

Page 57: ...LB 1641 BA6209 MOTOR DRIVER SIC1 SIC2 SIC5 NIC 1641 20 XS t Q sO 346 ge eda 25 32m m PY OUT1 OUT2 P2 vCCi 0 0 97 6 S 222 2h z m uU SZ Es m mike te ee geet LB1641 8 NI 2NI LLNO Lino Y4sdN WHdW3 3d YHd...

Page 58: ...ING Te FOCUS en COMPENSAT oO we 10N DEFECT AMP WDCH COMPARATOR ESCH ous FDFCT FOCUS Me ERROR AMP FCE FSEO LDON pece 60 1 83 AVEE RF FBIAS KS9282 DSP NIC9282 Sok 3 a a a a o 6 G2 3 SUBCODE G0 SQDT REGI...

Page 59: ...CQ921T M 50V 0 018M K 1 HC5 11505 714 273 C POLYESTER CQ921T M50V 0 027M K 1 IC28L 28R 11505 7 14 333 C POLYESTER CQ921T M 50V 0 033M K 2 IC6 11509 452 120 C POLYSTYRENE CQ09 S 50V 470 J 1 HC21 11608...

Page 60: ...HZ 12P 1 1X1 14539 504 100 CERAMIC RESONATOR CSB456F15 1 ICW 2 A6010 0989 CONNECTOR HOUSING GB200 8S LS BRN 1 lJ1 A3059 0006 TERMINAL BOARD PUSH SP 030 4P ANT 1 FP1 FM PACK B1290 0001 TUNER FM FE415 G...

Page 61: ...100M 6 3X11 1 JC10L 11R 11608 103 104 C ELECTROLYTIC SMS T 16V 100M 6 3X11 3 JC22 25 19R 11608 104 473 C ELECTROLYTIC SMS T 25V 47M 5X11 3 JC8L 8R 11608 106 102 C ELECTROLYTIC SMS T 50V 47M 5X11 2 JC...

Page 62: ...0 CONDENSER AXIAL LEAD 50V UP 050 SL47 J 2 AUC1L 1R MC2 MC3 11449 518 101 CONDENSER AXIAL LEAD 50V UP050 B100 K 4 BC5 6 QC8L 8R 24 23 11449 518 102 CONDENSER AXIAL LEAD 50V UP050 B1000 K 10 PC1L 1R QC...

Page 63: ...149 301 900 TRANSISTOR KSC 945 Y TAPE 10 EQI1L 1R AQ1L 1R BQ1 4 5 JQ1 12149 301 930 TRANSISTOR KSC1008 Y TAPE 1 RQ1 2 6 12149 401 070 TRANSISTOR KSD73 Y 3 RQ9 12149 401 950 TRANSISTOR KSD 882 Y 1 RQ7...

Page 64: ...ELEC VR 1 MR12 11018 277 101 R CARBON RD 1 4T 100 J 1 RR22 11018 377 121 R CARBON RD 0 5T 120 J 1 RR20 11018 377 152 R CARBON RD 1 5T 1 5K J 1 RRQ 11018 377 181 R CARBON RD 0 5T 180 J 1 RR4 5 11018 3...

Page 65: ...07 102 6 UL116 12429 411 100 COIL CHOKE AX 10UH 02 LA02TB100K UL114 115 12429 411 101 COIL CHOKE AX 100UH 02 LAL02TB101K 1 UW1 13349 511 573 CONNECTOR WAFER 5268 02A 2 UCW6 13349 170 071 CONNECTOR WAF...

Page 66: ...WITCH TACT SKHV10910A 10 USW107 108 109 102 101 14 7 LED section ts Oo er Location no Code no Description Specification Q ty Remark UQ2 8 12159 301 330 TR DIGITAL KSR2003 KRA103M TAPE 2 UQ4 3 1 5 6 7...

Page 67: ...3 100CT 1 NR116 11119 101 824 R CHIP SCR2012 824J 1 NR118 11119 102 820 R CHIP SCR2012 1 8 PL P 82 F 1 NC204 124 11128 018 474 C CHIP CERAMIC GRM40 Y5V 474Z16 530 2 NC119 120 121 107 108 11129 001 104...

Page 68: ...R WAFER 28 6216 016 100 808 BLK P C B CD MAIN G3A8 T1 6 W180 L230 Location no Code no Description Specification Q ty Remark INC703 11608 102 224 C ELECTROLYTIC SMS T 10V 220M 6 3X11 1 NC114 11608 103...

Page 69: ...egrated Circuit Input Output Killohertz Killogram L LED LPF Max MHz Min MOD MPX MGSW MGLS MGLK NF of NFB OP AMP ORG OSC PB PCB PLL P T R RAM REC REG REW RF ROM RIP sP sec SSG SSP ST ST EJT SW TP TR TR...

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