Sony XR-4890 Page 13 Service Manual Download | Manualshive

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GUIDE (C)

2

guide (C)

1

three claws

MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901)

3

Capstan/reel motor(M901)

2

Two precision screws

(P 2

×

2)

1

Belt

30

°

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Summary of Contents for XR-4890

Page 1: ... SERVICE MANUAL US Model Canadian Model Model Name Using Similar Mechanism XR C5100 Tape Transport Mechanism Type MG 25F 136 SPECIFICATIONS XR 4890 Photo XR 4890 FM AM CASSETTE CAR STEREO Continued on next page ...

Page 2: ... MAIN 2 2 Section 21 6 4 Printed Wiring Board PANEL Section 23 6 5 Schematic Diagram PANEL Section 25 6 6 IC Pin Function Description 27 7 EXPLODED VIEWS 29 8 ELECTRICAL PARTS LIST 32 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur ing repairing Do not touch the soldering iron on the same conductor of the circuit board within 3 times Be careful not to a...

Page 3: ... 3 SECTION 1 GENERAL This section is extracted from instruction manual ...

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Page 9: ... Y COVER ASS Y Note Follow the disassembly procedure in the numerical order given SECTION 2 DISASSEMBLY 1 Push the button release 2 Remove the front panel ass y to the direction of the arrow A A 1 1 1 2 2 2 3 cover ass y ...

Page 10: ...three screws PTT2 6 8 1 three screws PTT2 6 8 5 screw PTT2 6 6 6 mechanism deck MG 25F 136 4 flexible flat cable CN301 3 Two ground point screws 5 two screws PTT 2 6 8 5 two screws PTT 2 6 10 1 screw PTT2 6 8 5 two screws PTT 2 6 8 6 heat sink 2 rubber cap 25 1 two screws PTT2 6 8 4 main board ...

Page 11: ...nger by bending the claw 6 Fit projaction on D part 4 Fit claw on B part 5 Fit projection on C part 2 Install the hanger onto two claws of the housing 3 Put the housing under A part D part B part A part C part 8 Hold the hanger by bending the claw hanger housing 2 Move the arm suction in the arrow direction and fit on projection 1 Fit the arm suction on the shaft projection ...

Page 12: ...E stop ring 2 0 shaft B shaft A 2 Fit the lever LDG B on shafts A and B and install it 4 Align hole in the gear LDG D with hole the lever LDG A 5 gear LDG FT 6 polyethylene washer 3 Move the lever LDG B in the arrow direction 2 tensiton spring LD 1 2 tensiton spring LD 2 gear LDG FB lever LDG A hole hole gear LDG D 1 ...

Page 13: ... 13 GUIDE C 2 guide C 1 three claws MOUNTING POSITION OF CAPSTAN REEL MOTOR M901 3 Capstan reel motor M901 2 Two precision screws P 2 2 1 Belt 30 ...

Page 14: ... Measurement 0 dB 0 775 V TAPE DECK SECTION Tape Speed Adjustment Setting Speed checker Frequency counter 1 5 to 2 5 2 955 to 3 075 Hz Procedure 1 Put the set into the PB mode 2 Adjust adjustment resistor for inside capstan motor so that the reading on the speed checker or frequency counter becomes in specification Specification Constant speed Mode Torque Meter Meter Reading Forward CQ 102C 30 65 ...

Page 15: ...A3918 V2 IC751 TDA7385 IC Block Diagrams MAIN Board IC21 TB2118F EL SECTION 6 DIAGRAMS IC301 CXA2509AQ T4 VDD AMP AMP AMP VDD2 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 11 12 14 13 XO OSC CE DIN CK DOUT SR I O 1 I O 2 OUT 1 OUT 2 VDD2 IFC VDD FM IN AM IN D GND FM CP OUT VT AM CP OUT VCC REG A GND XI SERIAL INTERFACE I O PORT OSCILLATOR ON OFF BUFFER REFERENCE DIVIDER PHASE COMPARATOR 20BI...

Page 16: ... 11 D613 D 11 D614 C 11 D621 E 6 D622 E 7 D623 E 6 D624 E 7 D701 J 3 D702 K 3 D704 K 3 D705 K 5 D706 K 5 D707 K 5 D708 K 5 D709 K 5 D710 J 3 D711 K 5 D712 K 5 D713 K 5 D721 D 8 D722 D 8 D723 D 8 D724 D 9 D731 B 7 D732 D 7 D733 D 7 D734 B 7 D781 D 13 IC21 E 3 IC301 H 4 IC331 D 5 IC351 I 12 IC501 I 7 IC551 J 12 IC611 E 14 IC751 B 7 Q51 E 11 Q52 E 11 Q121 G 4 Q151 G 6 Q171 A 4 Q181 A 3 Q251 G 6 Q271 ...

Page 17: ... dc 14 4V and fed with regulated dc power supply from ACC and BATT cords Voltage and waveforms are dc with respect to ground under no signal conditions no mark FM TAPE PLAYBACK Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to no...

Page 18: ...ower voltage is dc 14 4V and fed with regulated dc power supply from ACC and BATT cords Voltage and waveforms are dc with respect to ground under no signal conditions no mark FM TAPE PLAYBACK Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production tolerances Waveforms are taken with a oscilloscope Voltage variations may be ...

Page 19: ...ON Note X parts extracted from the component side internal component b Pattern from the side which enables seeing Ref No Location Semiconductor Location D902 B 12 D903 B 12 D904 B 11 D951 C 9 Q945 C 2 Page 17 Ref No Location Semiconductor Location IC901 A 8 ...

Page 20: ...ltage is dc 14 4V and fed with regulated dc power supply from ACC and BATT cords Voltage and waveforms are dc with respect to ground under no signal conditions no mark FM TAPE PLAYBACK Impossible to measure Page 22 Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production tol erances Waveforms are taken with a oscilloscope Voltage variations may b...

Page 21: ... input acknowledge 27 NOSESW I Removing attaching front panel detection input 28 BU_IN I BACK UP detection input terminal 29 SIRCS I Remote control input 30 TELMUT I TELEPHONE MUTE detection input 31 TESTIN I Test mode setting input terminal 32 RAMBU I Reset detection input of RAM 33 RESET I Reset input terminal 34 VOLMUT O Not used 35 BEEP O Control output for buzzer 36 AMPMUT O Power amplifier m...

Page 22: ... Illumination power supply control output 83 REL I Input to detect rotation of reel table 84 POS3 I 85 POS2 I 86 POS0 I 87 POS1 I 88 LM LOD O Loading motor control output to a direction of loading 89 LM EJ O Loading motor control output to a direction of ejection TAPE power supply control output When on is output H is output otherwise when off is output L is output 91 CM ON O Capstan motor control...

Page 23: ... only with part number specified Les composants identifiés par une marque sont critiques pour la sécurité Ne les remplacer que par une piéce portant le numéro spécifié Ref No Part No Description Remark Ref No Part No Description Remark 11 3 031 026 01 HEAT SINK 12 3 935 014 01 CUSHION U 13 3 009 813 41 CHASSIS 14 3 012 859 01 CAP 25 RUBBER 15 3 937 650 01 PLATE C GROUND F781 1 532 877 11 FUSE BLAD...

Page 24: ...67 3 030 840 01 PLATE B GROUND LCD901 1 803 496 11 DISPLAY PANEL LIQUID CRYSTAL 51 3 030 838 01 BUTTON RELEASE 52 3 030 832 01 LEVER S A 53 3 932 475 01 SPRING RELEASE 54 3 030 834 01 BUTTON M S 55 3 030 835 01 BUTTON 1 6 56 3 031 027 11 BUTTON P P A 57 3 030 831 01 BUTTON SOURCE 58 3 030 830 01 KNOB VOL 60 3 030 837 01 BUTTON D BASS 61 3 030 839 01 SHEET REFLECTOR 57 58 60 65 54 66 53 51 52 56 5 ...

Page 25: ...01 437 21 WASHER HP901 1 500 157 21 HEAD MAGNETIC PLAYBACK M901 A 3291 665 A MOTOR ASSY MAIN CAPSTAN REEL 151 A 3291 667 A CLUTCH FR ASSY 152 3 019 130 01 LEVER LDG A 153 3 019 131 01 LEVER LDG B 154 3 020 539 01 SPRING LD 1 TENSION 155 3 020 540 01 SPRING LD 2 TENSION 156 3 020 542 01 GEAR LOADING FT 157 3 341 753 11 WASHER POLYETHYLENE 158 3 020 533 01 HOUSING 159 3 020 532 01 ARM SUCTION 160 3 ...

Page 26: ...TH LED SHIFT LSW921 1 762 619 21 SWITCH KEY BOARD WITH LED EJECT 6 LSW922 1 762 619 21 SWITCH KEY BOARD WITH LED PRESET LSW923 1 762 619 21 SWITCH KEY BOARD WITH LED PRESET LSW927 1 762 619 21 SWITCH KEY BOARD WITH LED DSPL LSW928 1 771 609 11 SWITCH TACTILE WITH LED 6 LSW929 1 771 609 11 SWITCH TACTILE WITH LED 5 ENTER LSW930 1 771 609 11 SWITCH TACTILE WITH LED 4 n LSW931 1 771 609 11 SWITCH TAC...

Page 27: ... 489 11 CERAMIC CHIP 0 22uF 10 16V C105 1 164 004 11 CERAMIC CHIP 0 1uF 10 25V C106 1 164 505 11 CERAMIC CHIP 2 2uF 16V C107 1 163 263 11 CERAMIC CHIP 330PF 5 50V C108 1 164 505 11 CERAMIC CHIP 2 2uF 16V C109 1 163 227 11 CERAMIC CHIP 10PF 0 5PF 50V C110 1 163 227 11 CERAMIC CHIP 10PF 0 5PF 50V C111 1 163 227 11 CERAMIC CHIP 10PF 0 5PF 50V C121 1 107 823 11 CERAMIC CHIP 0 47uF 10 16V C122 1 163 02...

Page 28: ...0 CERAMIC CHIP 0 1uF 10 25V C790 1 163 077 00 CERAMIC CHIP 0 1uF 10 25V C792 1 163 077 00 CERAMIC CHIP 0 1uF 10 25V C795 1 164 489 11 CERAMIC CHIP 0 22uF 10 16V CONNECTOR CN301 1 766 260 11 CONNECTOR FFC FPC ZIF 7P CN351 1 506 995 11 PIN CONNECTOR PC BOARD 13P CN701 1 785 774 11 PLUG CONNECTOR 15P CN781 1 774 701 11 PIN CONNECTOR 16P DIODE D1 8 719 991 65 DIODE SB02W03C D51 8 719 158 15 DIODE RD5 ...

Page 29: ...RRITE BLM21B1515B L3 1 410 501 11 INDUCTOR 2 2uH L4 1 410 501 11 INDUCTOR 2 2uH L21 1 410 509 11 INDUCTOR 10uH L22 1 410 989 11 INDUCTOR CHIP 0 47uH L781 1 411 669 12 INDUCTOR 0uH L781 1 411 669 21 INDUCTOR 0uH TRANSISTOR Q51 8 729 106 68 TRANSISTOR 2SD1615A GP Q52 8 729 120 28 TRANSISTOR 2SC1623 L5L6 Q121 8 729 920 21 TRANSISTOR DTC314TKH04 Q151 8 729 920 21 TRANSISTOR DTC314TKH04 Q171 8 729 920 ...

Page 30: ...ES CHIP 100K 5 1 10W R501 1 216 097 00 RES CHIP 100K 5 1 10W R502 1 216 097 00 RES CHIP 100K 5 1 10W R503 1 216 049 11 RES CHIP 1K 5 1 10W R504 1 216 049 11 RES CHIP 1K 5 1 10W R505 1 216 049 11 RES CHIP 1K 5 1 10W R506 1 216 049 11 RES CHIP 1K 5 1 10W R507 1 249 417 11 CARBON 1K 5 1 4W F R508 1 249 417 11 CARBON 1K 5 1 4W F R509 1 249 417 11 CARBON 1K 5 1 4W F R510 1 247 807 31 CARBON 100 5 1 4W ...

Page 31: ...UNER TU01 A 3220 689 A TUNER UNIT TUX 010 2 VIBRATOR X501 1 781 294 21 VIBRATOR CRYSTAL 18 432MHz X502 1 567 098 41 VIBRATOR CRYSTAL 32 768kHz MISCELLANEOUS 9 1 776 207 31 CORD WITH CONNECTOR POWER 63 1 694 508 11 CONDUCTIVE BOARD CONNECTION 507 1 776 207 31 CORD WITH CONNECTOR POWER F781 1 532 877 11 FUSE BLADE TYPE AUTO FUSE 10A HP901 1 500 157 21 HEAD MAGNETIC PLAYBACK LCD901 1 803 496 11 DISPL...

Page 32: ... 38 XR 4890 Sony Corporation Personal Mobile Communication Company 9 926 405 31 99A09212 1 Printed in Japan 1999 1 Published by Quality Assurance Dept ...

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