Sony XR-4880 Service Manual Download

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AEP Model

UK Model

Model Name Using Similar Mechanism

XR-C6100R

Tape Transport Mechanism Type

MG-25F-136

SPECIFICATIONS

XR-4880

Photo: XR-4880

FM/MW/LW CASSETTE CAR STEREO

MICROFILM

SERVICE MANUAL

Summary of Contents for XR-4880

Page 1: ...AEP Model UK Model Model Name Using Similar Mechanism XR C6100R Tape Transport Mechanism Type MG 25F 136 SPECIFICATIONS XR 4880 Photo XR 4880 FM MW LW CASSETTE CAR STEREO MICROFILM SERVICE MANUAL ...

Page 2: ...Diagram MAIN 2 2 Section 23 6 4 Printed Wiring Board PANEL Section 25 6 5 Schematic Diagram PANEL Section 27 6 6 IC Pin Function Description 29 7 EXPLODED VIEWS 31 8 ELECTRICAL PARTS LIST 34 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 n...

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

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Page 8: ... 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 9: ...1 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 Screw PTT 2 6 8 6 Heat sink 2 Rubber cap 25 1 Two screws PTT2 6 8 4 Main board ...

Page 10: ...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 11: ...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 12: ... 12 GUIDE C MOUNTING POSITION OF CAPSTAN REEL MOTOR M901 2 Guide C 1 Three claws 3 Capstan reel motor M901 2 Two precision screws P 2 2 1 Belt 30 ...

Page 13: ...2RC 0 5 4 5g cm Back Tension 0 01 0 06 oz inch FF REW CQ 201B 60 200 g cm 0 83 2 78 oz inch TEST MODE This set have the test mode function In the test mode FM Auto Scan Stop Level and MW Auto Scan Stop Level adjustments can be performed easier than it in ordinary procedure Set the Test Mode 1 Set the OFF mode 2 Push the preset 4 button 3 Push the preset 5 button 4 Press the preset 1 button for mor...

Page 14: ...n See page 16 FM Stereo Separation Adjustment Setting SOURCE button FM FM Stereo Level meter Level meter signal generator connection reading dB output channel L CH L CH A B R CH L CH Adjust RV4 on TU1 for minimum reading R CH R CH C D L CH R CH Adjust RV4 on TU1 for minimum reading Procedure L CH Stereo separation A B R CH Stereo separation C D The separations of both channels should be equal Spec...

Page 15: ... 4 Adjust with the volume RV1 on TU1 so that the MW indi cation turns to MWI indication on the display window But in case of already indicated MWI turn the RV1 so that put out light I indication and adjustment Display Adjustment Location See page 16 AM RF signal generator Carrier frequency 999 kHz 30 amplitude modulation by 1 kHz signal Output level 33 dB 44 7 µV 50 Ω set AM dummy antenna 30 Ω 15 ...

Page 16: ... 16 Adjustment Location RV1 MW Auto Scan Stop Level Adjustment RV2 FM Auto Scan Stop Level Adjustment RV4 FM Stereo Separation Adjustment Tape Speed Adjustment TU1 SET UPPER VIEW ...

Page 17: ...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 18: ... 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 13 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 A 3...

Page 19: ...oltage 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 noted ...

Page 20: ...nent C panel designation U B Line Power 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 osci...

Page 21: ...acted from the component side internal component b Pattern from the side which enables seeing Ref No Location Semiconductor Location IC901 A 8 Page 19 Ref No Location Semiconductor Location D902 B 12 D903 B 12 D904 B 11 D951 C 9 Q941 B 1 Q942 C 1 Q943 C 1 Q944 C 1 Q945 C 2 ...

Page 22: ...U B Line XR 4880 Power 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 tol erances Waveforms are taken with a oscilloscope Voltage...

Page 23: ...emoving 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 TEST IN I Test mode setting input terminal 32 RAMBU I Reset detection input of RAM 33 RESET I Reset input terminal 34 VOL MUT O Electrical volume mute control output 35 BEEP O Control output for buzzer 36 AMPMUT O Power amplifier mu...

Page 24: ...O 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 contro...

Page 25: ... ing materials are given in the last of this parts list Ref No Part No Description Remark Ref No Part No Description Remark 10 3 018 390 01 BRACKET IC 11 3 031 026 11 HEAT SINK 12 3 935 014 01 CUSHION U 13 3 009 813 42 CHASSIS 14 3 012 859 01 CAP 25 RUBBER 15 3 937 650 01 PLATE C GROUND F781 1 532 877 11 FUSE BLADE TYPE AUTO FUSE 10A 1 3 030 828 01 PANEL SUB 2 3 935 003 01 SPRING TORSION 3 3 027 4...

Page 26: ...66 X 3377 058 1 PANEL SUB ASSY 67 3 030 840 01 PLATE B GROUND LCD901 1 803 497 11 DISPLAY PANEL LIQUID CRYSTAL 51 3 030 838 11 BUTTON RELEASE 52 3 030 832 11 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 11 BUTTON D BASS 57 58 60 65 54 66 53 51 52 56 5 5...

Page 27: ...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 28: ...ITH LED PRESET LSW927 1 762 620 21 SWITCH KEY BOARD WITH LED DSPL LSW928 1 771 610 11 SWITCH TACTILE WITH LED 6 LSW929 1 771 610 11 SWITCH TACTILE WITH LED 5 ENTER LSW930 1 771 610 11 SWITCH TACTILE WITH LED 4 n LSW931 1 771 610 11 SWITCH TACTILE WITH LED 3 PLAY MODE LSW932 1 771 610 11 SWITCH TACTILE WITH LED 2 SETUP LSW933 1 771 610 11 SWITCH TACTILE WITH LED 1 N PILOT LAMP PL901 1 517 633 21 LA...

Page 29: ...0 10V C35 1 163 809 11 CERAMIC CHIP 0 047uF 10 25V C36 1 163 251 11 CERAMIC CHIP 100PF 5 50V C37 1 124 233 11 ELECT 10uF 20 16V C38 1 163 809 11 CERAMIC CHIP 0 047uF 10 25V C40 1 163 021 11 CERAMIC CHIP 0 01uF 10 50V C41 1 163 021 11 CERAMIC CHIP 0 01uF 10 50V C44 1 163 251 11 CERAMIC CHIP 100PF 5 50V C51 1 164 004 11 CERAMIC CHIP 0 1uF 10 25V C52 1 124 233 11 ELECT 10uF 20 16V C53 1 124 234 00 EL...

Page 30: ...1 124 233 11 ELECT 10uF 20 16V C755 1 124 589 11 ELECT 47uF 20 16V C757 1 124 233 11 ELECT 10uF 20 16V C781 1 126 936 11 ELECT 3300uF 20 16V C782 1 163 077 00 CERAMIC CHIP 0 1uF 10 25V C783 1 163 077 00 CERAMIC CHIP 0 1uF 10 25V C784 1 163 077 00 CERAMIC CHIP 0 1uF 10 25V C786 1 109 982 11 CERAMIC CHIP 1uF 10 10V C787 1 109 982 11 CERAMIC CHIP 1uF 10 10V C788 1 163 077 00 CERAMIC CHIP 0 1uF 10 25V...

Page 31: ...16 296 00 SHORT 0 JC751 1 216 296 00 SHORT 0 JC752 1 216 295 00 SHORT 0 JC781 1 216 296 00 SHORT 0 JC782 1 216 295 00 SHORT 0 JC992 1 216 296 00 SHORT 0 COIL L2 1 469 129 21 FERRITE EMI L3 7 611 032 01 WIRE TINNING COPPER L4 1 410 501 11 INDUCTOR 2 2uH L21 1 410 509 11 INDUCTOR 10uH L22 1 410 989 11 INDUCTOR CHIP 0 47uH L501 1 410 989 11 INDUCTOR CHIP 0 47uH L781 1 411 669 12 COIL CHOKE 0 4mH TRAN...

Page 32: ... 105 00 RES CHIP 220K 5 1 10W R331 1 216 298 00 METAL CHIP 2 2 5 1 10W R351 1 216 049 11 RES CHIP 1K 5 1 10W R352 1 249 383 11 CARBON 1 5 5 1 6W F R353 1 216 065 00 RES CHIP 4 7K 5 1 10W R354 1 216 073 00 METAL CHIP 10K 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 1...

Page 33: ...BRATOR X501 1 781 294 21 VIBRATOR CRYSTAL 18 432MHz X502 1 567 098 41 VIBRATOR CRYSTAL 32 768kHz MISCELLANEOUS 9 1 776 527 81 CORD WITH CONNECTOR ISO POWER 63 1 694 508 11 CONDUCTIVE BOARD CONNECTION 506 1 776 527 31 CORD WITH CONNECTOR ISO POWER F781 1 532 877 11 FUSE BLADE TYPE AUTO FUSE 10A HP901 1 500 157 21 HEAD MAGNETIC PLAYBACK LCD901 1 803 497 11 DISPLAY PANEL LIQUID CRYSTAL M901 A 3291 66...

Page 34: ... 40 XR 4880 Sony Corporation Personal Mobile Communication Company 9 926 408 11 99B097542 1 Printed in Hungary 1999 2 Published by Quality Assurance Dept ...

Page 35: ...www s manuals com ...

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