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MICROFILM

SERVICE MANUAL

FM/MW/LW CASSETTE CAR STEREO

AEP Model

UK Model

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

MG-25G-136

SPECIFICATIONS

XR-4790/4800

Photo: XR-4800

Содержание XR-4800

Страница 1: ...MICROFILM SERVICE MANUAL FM MW LW CASSETTE CAR STEREO AEP Model UK Model Model Name Using Similar Mechanism NEW Tape Transport Mechanism Type MG 25G 136 SPECIFICATIONS XR 4790 4800 Photo XR 4800 ...

Страница 2: ...ram Panel Section XR 4790 31 6 5 Printed Wiring Board Panel Section XR 4800 33 6 6 Schematic Diagram Panel Section XR 4800 35 6 7 IC Pin Function Description 37 7 EXPLODED VIEWS 40 8 ELECTRICAL PARTS LIST 44 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 t...

Страница 3: ... 3 SECTION 1 GENERAL This section is extracted from instruction manual XR 4790 ...

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Страница 8: ...he disassembly procedure in the numerical order given SECTION 2 DISASSEMBLY FRONT PANEL ASS Y COVER ASS Y 1 Push the button release 2 Remove the front panel ass y to the direction of the arrow A A 2 1 2 1 3 cover ass y ...

Страница 9: ...PTT2 6 6 3 connector CN351 2 sub panel 4 flexible flat cable CN301 6 mechanism deck MG 25G 136 1 three screws PTT2 6 8 1 three screws PTT2 6 8 1 screw PTT2 6 8 6 heat sink 4 main board 3 two ground point screws 5 six screws PTT2 6 8 2 rubber cap 25 1 two screws PTT2 6 8 ...

Страница 10: ...bending the claw 6 Fit projection on D part 4 Fit claw on B part 3 Put the housing under A part 5 Fit projection on C part 1 Install the catch to the hanger 2 Install the hanger onto two claws of the housing 7 Holder the hanger by bending the claw hanger housing 2 Move the arm suction in the arrow direction and fit on profection 1 Fit the arm suction on the shaft projection ...

Страница 11: ...A shaft B 2 Fit the lever LDG B on shafts A and B and install it 3 type E stop ring 2 0 gear LDG D 5 gear LDG FT 6 polyethylene washer 2 tension spring LD 2 2 tension spring LD 1 gear LDG FB lever LDG A hole hole 4 Align hole in the gear LDG D with hole the lever LDG A 3 Move the lever LDG B in the arrow direction 1 ...

Страница 12: ... 12 GUIDE C 2 guide C 1 three claws ...

Страница 13: ...test mode function In the test mode FM Auto Scan Stop Level andAM MW Auto Scan Stop Level adjustments can be performed easier than it in ordinary procedure Set the Test Mode 1 Set the power select switch S801 is A position 2 Turn ON the regulated power supply All LEDs on the set lights up and the clock is displayed Note Press the OFF button if the clock is not displayed 3 Push the preset 4 button ...

Страница 14: ...Focus Adjustment Setting SOURCE button FM Procedure 1 Tune the 98 00 MHz 2 The then output level is supposing that A dB 3 Adjust with the volume RV3 on TU1 so that the output level is A 32 2 dB then signal generator input set to 20 dB Adjustment Location See page 16 FM Stereo Separation Adjustment Setting SOURCE button FM Procedure FM RF signal generator Carrier frequency 98 00 MHz Output level 60...

Страница 15: ...lay 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 ...

Страница 16: ...djustment Location RV1 AM MW Auto Scan Stop Level Adjustment RV2 FM Auto Scan Stop Level Adjustment RV3 FM Noise Focus Adjustment RV4 FM Stereo Separation Adjustment Tape Speed Adjustment TU1 SET UPPER VIEW ...

Страница 17: ...EIN2 PBEQ2 PBOUT2 GND F2 120µ 70µ X1 X1 VCT F1 120µ 70µ 24dB F3 LPF VCC DETECT MS ON OFF FWD RVS TAPE EQ TAPE AUX NR BIAS 24dB MS MODE T2 T1 IC361 MM1322XFBE 1 2 3 4 5 6 7 8 OUT2 VS OUT1 GND IN1 VCC IN2 GND CONTROL CIRCUIT IC401 LC75373ED DECODER LATCH SHIFT REGISTER CONTROL 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 L...

Страница 18: ... 18 IC601 BA3918 V2 OVER VOLTAGE PROTECT REGULATOR 1 2 3 4 5 6 7 8 9 10 12 11 NC MODE2 MODE1 STB VDD AMP VCC ANT COM AM FM GND ...

Страница 19: ... 19 4 6 Vp p 220 ns Waveform MAIN Section 1 IC501 ...

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Страница 24: ...uting on 19 DX LO O Local DX selection signal output to the FM AM tuner unit TU1 L DX H local 20 AM MONO O AM forced monaural signal output terminal Not used open 21 GND Ground terminal 22 DSTSEL1 I Destination setting terminal fixed at center voltage 23 D BASS I D BASS switch SW951 input A D input 24 KEYIN1 I 25 KEYIN0 I 26 RC IN0 I Rotary remote commander shift key A D input terminal 27 VSM I FM...

Страница 25: ... 56 TESTIN I Setting terminal for the test mode L test mode normally fixed at H 57 RC IN1 I Rotary remote commander shift key A D input terminal 58 PW SEL I Power select switch S801 input terminal L position A halt mode H position B operation mode 59 MTLIN I Input terminal to set whether the auto metal function is present or not L auto metal function is present fixed at H 60 KEYACT O Power supply ...

Страница 26: ...er clock signal output terminal for the unilink Not used open 72 BUSON O Bus on off control signal output terminal Not used pull down 73 SYSRST O Reset signal output terminal L reset Not used pull down 74 VREG O CPU regulator output terminal Connected to capacitor 75 GND Ground terminal 76 X OUT O Main system clock output terminal 4 5 MHz 77 X IN I Main system clock input terminal 4 5 MHz 78 CE I ...

Страница 27: ...rk Ref No Part No Description Remark 1 CHASSIS SECTION 1 3 009 294 01 PANEL SUB 2 3 935 003 01 SPRING TORSION 3 3 932 205 21 DOOR CASSETTE 4 X 3367 636 1 LOCK ASSY 5 3 016 595 01 INSULATOR 6 A 3313 351 A MAIN BOARD COMPLETE XR 4800 6 A 3313 360 A MAIN BOARD COMPLETE XR 4790 7 3 009 816 01 BRACKET IC ISO 8 A 3309 913 A CONNECTOR BOARD COMPLETE 9 3 010 471 01 HEAT SINK 10 3 935 014 01 CUSHION U 11 3...

Страница 28: ...3 010 387 01 BUTTON PRESET 6 1 2 3 4 5 6 DSPL 60 3 010 392 01 BUTTON L P LCL PRST 61 3 010 375 01 SHEET REFLECTOR 62 3 018 385 01 PLATE LCD LIGHT GUIDE 63 3 018 386 01 HOLDER LCD 64 3 010 382 01 PANEL FRONT BACK 65 3 015 036 01 CUSHION BACK PANEL LCD901 1 801 966 11 DISPLAY PANEL LIQUID CRYSTAL 2 FRONT PANEL SECTION XR 4790 Ref No Part No Description Remark Ref No Part No Description Remark LCD901...

Страница 29: ... 300 01 BUTTON SOURCE 109 3 018 797 11 BUTTON L 3 SEEK AMS 0 r OFF SEL ATT 110 3 014 602 11 SPACER A 111 3 016 927 01 BUTTON 1 3 6 1 2 3 112 3 016 928 11 BUTTON 4 6 4 5 6 113 3 016 930 01 BUTTON R 3 BTM LCL r 114 3 019 151 01 PLATE LCD GROUND 115 3 019 150 01 SHEET REFLECTOR 116 3 018 612 01 PLATE LIGHT GUIDE 117 3 018 611 01 HOLDER LCD 118 3 010 519 01 PANEL FRONT BACK LCD901 1 801 966 11 DISPLAY...

Страница 30: ... 341 753 11 WASHER POLYETHYLENE 158 3 020 533 01 HOUSING 159 3 020 532 01 ARM SUCTION 160 3 020 534 01 HANGER 161 3 933 346 01 CATCHER 162 3 933 344 01 GUIDE C 163 3 014 798 01 SCREW HEAD SPECIAL 164 3 364 151 01 WASHER 165 A 3301 267 A CHASSIS ASSY G 166 3 017 302 01 BELT 25 167 3 936 853 01 FLYWHEEL F 168 3 701 437 21 WASHER HP901 1 500 196 21 HEAD MAGNETIC PLAYBACK M901 A 3291 665 A MOTOR ASSY ...

Страница 31: ...T XR 4790 3 018 385 01 PLATE LCD LIGHT GUIDE XR 4790 3 018 386 01 HOLDER LCD XR 4790 3 018 611 01 HOLDER LCD XR 4800 3 018 612 01 PLATE LIGHT GUIDE XR 4800 3 019 149 01 PLATE LCD XR 4800 3 019 150 01 SHEET REFLECTOR XR 4800 3 019 151 01 PLATE LCD GROUND XR 4800 CAPACITOR C901 1 163 033 00 CERAMIC CHIP 0 022uF 50V C902 1 165 319 11 CERAMIC CHIP 0 1uF 50V C903 1 165 319 11 CERAMIC CHIP 0 1uF 50V C90...

Страница 32: ...BOARD WITH LED BL SKIP 6 XR 4800 GREEN LSW926 1 762 617 11 SWITCH KEY BOARD WITH LED ATA 5 AMBER LSW926 1 762 619 11 SWITCH KEY BOARD WITH LED ATA 5 GREEN LSW927 1 762 617 11 SWITCH KEY BOARD WITH LED 4 XR 4790 AMBER LSW927 1 762 617 11 SWITCH KEY BOARD WITH LED MTL 4 XR 4800 AMBER LSW927 1 762 619 11 SWITCH KEY BOARD WITH LED 4 XR 4790 GREEN LSW927 1 762 619 11 SWITCH KEY BOARD WITH LED MTL 4 XR ...

Страница 33: ...2uF 10 25V C11 1 126 160 11 ELECT 1uF 20 50V C13 1 163 251 11 CERAMIC CHIP 100PF 5 50V C14 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C15 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V C16 1 124 589 11 ELECT 47uF 20 16V C17 1 164 004 11 CERAMIC CHIP 0 1uF 10 25V C18 1 107 823 11 CERAMIC CHIP 0 47uF 10 16V C19 1 163 017 00 CERAMIC CHIP 0 0047uF 5 50V C23 1 216 295 11 SHORT CHIP 0 C24 1 165 319 11 CERAMIC C...

Страница 34: ...1 126 163 11 ELECT 4 7uF 20 50V C751 1 164 506 11 CERAMIC CHIP 4 7uF 16V C752 1 126 096 11 ELECT 10uF 20 35V C753 1 136 173 00 FILM 0 47uF 5 50V C754 1 107 823 11 CERAMIC CHIP 0 47uF 10 16V C755 1 107 823 11 CERAMIC CHIP 0 47uF 10 16V C801 1 126 936 11 ELECT 3300uF 20 16V C802 1 163 251 11 CERAMIC CHIP 100PF 5 50V C851 1 164 232 11 CERAMIC CHIP 0 01uF 50V C854 1 165 319 11 CERAMIC CHIP 0 1uF 50V C...

Страница 35: ...5 00 METAL CHIP 4 7K 5 1 10W R15 1 216 029 00 METAL CHIP 150 5 1 10W R16 1 216 073 00 METAL CHIP 10K 5 1 10W R101 1 216 097 00 RES CHIP 100K 2012 R102 1 216 097 00 RES CHIP 100K 2012 R103 1 216 041 00 METAL CHIP 470 5 1 10W R104 1 216 109 00 METAL CHIP 330K 5 1 10W R105 1 216 077 00 METAL CHIP 15K 5 1 10W R106 1 216 079 00 METAL CHIP 18K 5 1 10W XR 4800 R107 1 216 210 00 RES CHIP 3 3K 3216 R108 1 ...

Страница 36: ...ETAL CHIP 10K 5 1 10W R550 1 208 806 11 RES CHIP 10K R551 1 216 025 00 RES CHIP 100 2012 R552 1 216 025 00 RES CHIP 100 2012 R553 1 216 097 00 RES CHIP 100K 2012 R554 1 216 295 11 SHORT CHIP 0 R556 1 216 049 11 RES CHIP 1K 2012 XR 4800 R561 1 216 065 00 METAL CHIP 4 7K 5 1 10W R562 1 249 429 11 CARBON 10K 5 1 4W R568 1 216 097 00 RES CHIP 100K 2012 R570 1 216 097 00 RES CHIP 100K 2012 R571 1 216 0...

Страница 37: ...1 514 21 MANUAL INSTRUCTION FRENCH GERMAN DUTCH ITALIAN XR 4790 AEP 3 861 514 31 MANUAL INSTRUCTION POLISH CZECH GREEK TURKISH ENGLISH XR 4790 South European 3 861 515 11 MANUAL INSTRUCTION INSTALL ENGLISH SPANISH SWEDISH PORTUGUESE XR 4790 AEP UK 3 861 515 21 MANUAL INSTRUCTION INSTALL FRENCH GERMAN DUTCH ITALIAN XR 4790 AEP 3 861 515 31 MANUAL INSTRUCTION INSTALL POLISH CZECH GREEK TURKISH ENGLI...

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