Sony CFM-20, Service Manual

Page 1: ...TTE CORDER SPECIFICATIONS AEP Model UK Model E Model 9 873 105 22 2002J0200 1 2002 10 Model Name Using Similar Machanism CFM S1 Tape Transport Mechanism Type MF M20 117 Sony Corporation Personal Audio Company Published by Sony Engineering Corporation ...

Page 2: ...Schematic Diagrams Main Section 2 2 14 5 EXPLODED VIEWS 5 1 Front Cabinet Section 17 5 2 Rear Cabinet Section 18 5 3 Mechanism Deck Section 1 MF M20 117 19 5 4 Mechanism Deck Section 2 MF M20 117 20 6 ELECTRICAL PARTS LIST 21 SECTION 1 GENERAL SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK OR DOTTED LINE WITH MARK ONTHE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE O...

Page 3: ... ASSY Record playback head HRP101 Reel capstan motor M101 Belt 3 1 2Screws BVTP 3X14 2Screws BVTP 3X14 4Remove solder two place 5CNP103 6Cabinet front sub ASSY Lid BATT Cabinet rear ASSY White White red 3 4 CNP102 1Screw BVTP 3X10 2CNP101 5MD ASSY Bracket VOL Cabinet rear ASSY Abbreviation SP Singapore AR Argentina HK Hong Kong MX Mexican IT Italian TW Taiwan C SA Central and South America CET Eas...

Page 4: ...ping B PTT 2X5 s MD ASSY 4Record playback head HRP101 8Reel capstan motor M101 MD ASSY M101 Belt Flywheel ASSY Attaching belt 6Spring Compr 3Screws PTT 2X 5 7Screws P2 6X 5 9Belt 5Lug T plate 2Guide tape 7 8 6 1 2 0 4 Screw BVTP 3X10 3Screw BVTP 3X10 Jack board 9 CNP901 Main board MCabinet rear knob VOL knob FUN Chasis 5Screw BVTP 3X10 ...

Page 5: ...ng power cord first turn it around the projection on Cabi rear as shown in the figure and secure it with PWB cord retainer 2 4 6 8 3Screw BVTP 3X10 1Claw Power board Cord power Batt board PWB Cord retainer White Red 5 7 Screws BVTP 3X10 Remove solder two places Cabinet rear 1 2 4 Claw 3Screws BVTP 3X10 Power board Batt board Red White Cabinet rear ...

Page 6: ...inter to Cabinet front as shown in the figure 4 Set the right side edge of Pointer to the center of three scratched lines on Back plate 3Screws 6Turn knob tuner fully in the direction of the arrow as shown in the figure Cabinet rear ASSY Cabinet front BVTP 3X10 Pointer Back plate Note Follow the installation procedure in the numerical order given ...

Page 7: ...cord playback head pinch roller erase head rubber belts capstan 2 Demagnetize the record playback head with a head demagnetizer Do not bring the head demagnetizer close to the erase head 3 Do not use a magnetized screwdriver for the adjustments 4 After the adjustments apply suitable locking compound to the parts adjusted 5 The adjustments should be performed with the rated power sup ply voltage un...

Page 8: ...del t KH102 Speaker output Speaker output 12Ω Earphone jack 8Ω tape speed adjustment control inside motor AM RF signal generator 30 amplitude modulation by 400Hz signal Output level as low as possible Put the lead wire antenna close to the set set level meter J101 Earphone jack AEP UK CET IT AR HK SP modelt C SA MX TW model t KH102 Speaker output Speaker output 12Ω Earphone jack 8Ω set level meter...

Page 9: ...0MHz 87 35MHz CT1 108 30MHz 109 50MHz 108 25MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1 87 00MHz 86 50MHz 87 35MHz CT2 108 30MHz 109 50MHz 108 25MHz C SA MX TW model IT model Adjustment Location MAIN board FM IF ADJUSTMENT Adjust for a maximum reading on level meter L5 10 7MHz C SA MX TW model IT model MAIN BOARD Conductor side CT3 AM Frequency Coverage Adjustment CT4...

Page 10: ...10 CFM 20 ...

Page 11: ... RADIO B REEL CAPSTAN MOTOR TAPE POWER MIC S102 PB REC REC PB HEAD ERASE HEAD TRANSFORMER POWER T901 IN MIC IN PRE POWER AMP POWER ON OFF AUX TAPE AUX HEAD IN HEAD IN BTL1 BTL2 REC PB DRY BATTERY SIZE D IEC DESIGNATION R20 4PCS 6V D901 902 RECT B REG B VOLUME BIAS BIAS LINE OUT IN POWER IC1 IC101 AC IN AM ANTENNA L3 FM AM FRONT END RADIO B TRANSFORMER POWER T901 D901 902 RECT REG Q101 RIPPLE FILTE...

Page 12: ...CEPT IT C1 C122 C132 R3 C18 JC1 JC2 C19 C20 R1 C15 C9 JC4 C136 C125 C135 C102 C104 C107 C110 C111 C117 D1 D2 L2 L2 L5 JW1 JW2 JW4 JW5 JW7 JW101 JW102 JW103 JW104 JW105 JW106 JW107 JW108 JW109 JW110 JW111 JW113 C119 D104 OPR BATT L1 IC101 D106 C11 L4 C4 C5 CNP101 R120 CNP102 KH101 KH102 C121 R113 C112 C124 Q101 C131 R132 R131 C133 S101 CNP103 2 1 C16 CF1 CF2 T1 C17 C16 JW3 JW6 RV101 VOLUME D101 D10...

Page 13: ...G GND BAND AFC QUAD AM RF IN FM RF OUT BAND SEL FM OSC AM OSC DET OUT AGC VCC GND FM RF IN RF GND MIX OUT FM IF IN AM IF IN IF AMP DET FM MPX IC1 AM ANTENNA L3 FERRITE BAR TA2132AF FM AM FRONT END C SA AR HK MX SP TW C3 7p 10p FM RF CT1 CV1 CV2 CT2 FM OSC C SA AR HK MX SP TW C4 15p 18p AEP UK CET IT R2 6 8k 4 7k IT C SA AR HK MX SP TW AEP UK CET CT4 CV4 CT3 CV3 AM OSC C11 3 3p 6 8p C SA MX TW AEP ...

Page 14: ...0V 0 1 470 16V 10 220 0 022 1k 2 2k 0 047 150 3P 470k 100p SPRAKER 1SS133 1SS133 1SS133 0 1 470 6 3V 0 01 220 10V 1000p 0 01 MTZJ3 9B 680 100p 20k 100 SPRAKER 0 1 0 1 1N4002B 1N4002B 1N4002B 0 01 0 01 T630mAL 250V 1000p 1000p 0 47 50V 10k 100p 1k 4 7k L 34HD 220 220 1k 2P 6 8k 1SS133 1SS133 4700p KTC3198BL REG B SIG GND BAND GND TRANSFORMER POWER T901 MIC N F NF EQ BIAS BIAS SIG GND LINE OUT POWER...

Page 15: ...ment for repair Power voltage is dc 6V and fed with regulated dc power supply from external power voltage jack Voltages are dc with respect to ground under no signal detuned conditions no mark FM AM RADIO SECTION PLAY TAPE SECTION MIC REC RADIO REC Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal production toler ances Signal path F FM f AM E PB a R...

Page 16: ...X AM MIX AGC 1 2 3 4 AGC RF GND MIX OUT FM RF IN 5 6 7 8 GND FM IF IN AM IF IN VCC AM RF FM RF AF BUFF FM IF AM IF TAPE AUX REC PLAY MIX ECM NC REC POWER ON OFF AUX IN LPF ALC DEL P VCC P VCC POWER GND PBTL2 POP DEL B B B B B B B B B B B B B B MIC IN POWER GND POWER IN LIN OUT RIPPLE FILTER RIPPLE FILTER SIG VCC SIG GND BIAS VBIAS TAPE EQ TAPE NF HEAD IN HEAD IN MIC N F BTL1 21 22 23 24 25 26 27 2...

Page 17: ...Ref No Part No Description Remark 5 1 FRONT CABINET SECTION Abbreviation SP Singapore HK Hong Kong AR Argentina MX Mexican IT Italian TW Taiwan C SA Central and South America CET East European Russian 2 1 1 1 2 ECM101 3 5 4 1 1 X 3380 636 1 LID CSSETTE SUB ASSY BLACK C SA SP MX AR TW 1 X 3380 637 1 LID CSSETTE SUB ASSY SILVER AEP UK IT CET HK 2 X 3380 915 1 CABINET FRONT SUB ASSY INCLUDING SP101 B...

Page 18: ...K IT CET HK SP AR The components identified by mark 0 or dotted line with mark 0 are critical for safety Replace only with part number specified 61 3 226 018 01 BRACKET PWB 62 1 680 977 11 BATT BOARD 63 3 226 027 01 HANDLE BLACK C SA MX AR SP TW 63 3 226 027 21 HANDLE SILVER AEP UK IT CET HK 64 3 226 054 11 KNOB VOL BLACK C SA MX AR SP TW 64 3 226 054 21 KNOB VOL SILVER AEP UK IT CET HK 65 3 226 0...

Page 19: ...R REW 111 3 933 018 11 SLIDER FF 112 3 933 009 11 SLIDER STOP 113 3 933 008 11 SLIDER PAUSE 114 3 933 004 01 CLAW REEL 115 3 933 021 01 SLIDER FRP 116 3 933 006 01 SLIDER EJECT 117 3 934 833 01 SPRING FRP 118 3 022 794 02 SPRING BT 119 3 933 007 01 PLATE LOCK 120 3 009 076 01 CHASSIS HEAD 121 3 010 625 01 GUIDE TAPE 122 3 342 917 01 SCREW IT3 C TAPPING B 123 3 936 265 01 LUG T PLATE 124 4 936 201 ...

Page 20: ...ESSION 160 X 3373 572 1 REEL ASSY N T 161 3 933 020 01 BELT 162 X 3377 877 2 FLYWHEEL ASSY 163 3 932 993 01 CHASSIS OUTSERT 164 3 343 358 01 RING RETAINING 165 3 223 156 01 SPRING CAM COMPRESSION 166 3 934 336 01 BEARING 167 3 939 383 02 SPRING COMPRESSION 168 3 936 438 01 LEVER K M101 A 3052 373 A MOTOR ASSY REEL CAPSTAN INCLUDING PULLEY S501 1 762 679 11 SWITCH LEAF TAPE POWER Ref No Part No Des...

Page 21: ... SA AR HK MX SP TW C4 1 162 205 31 CERAMIC 18PF 5 50V AEP UK CET C4 1 162 199 31 CERAMIC 10PF 50V IT C5 1 162 197 31 CERAMIC 6 8PF 10 50V EXCEPT IT C5 1 162 203 31 CERAMIC 15PF 5 50V IT C7 1 162 908 11 CERAMIC CHIP 3PF 0 25PF 50V C9 1 216 864 11 SHORT 0 C11 1 162 193 31 CERAMIC 3 3PF 10 50V C SA MX TW C11 1 162 197 31 CERAMIC 6 8PF 10 50V AEP UK IT CET AR HK SP C13 1 162 919 11 CERAMIC CHIP 22PF 5...

Page 22: ...GE C SA AR HK MX SP TW L2 1 424 726 11 COIL AIR CORE FM OSC FM FREQUENCY COVERAGE AEP UK CET L2 1 419 998 11 COIL OSCILLATION FM OSC FM FREQUENCY COVERAGE IT L3 1 501 919 11 ANTENNA FERRITE BAR AM TRCKING L4 1 406 040 00 COIL OSC AM OSC AM FREQUENCY COVERAGE L5 1 409 944 11 COIL DET FM DET L10 1 412 689 11 INDUCTOR 0 47uH TRANSISTOR Q101 8 729 036 90 TRANSISTOR KTC3198BL AT RESISTOR R1 1 216 797 1...

Page 23: ...80 916 1 CABINET FRONT SUB ASSY INCLUDING SP101 SILVER AEP UK CET 2 X 3380 917 1 CABINET FRONT SUB ASSY INCLUDING SP101 BLACK AR SP 2 X 3380 918 1 CABINET FRONT SUB ASSY INCLUDING SP101 SILVER IT 2 X 3380 919 1 CABINET FRONT SUB ASSY INCLUDING SP101 SILVER HK 068 1 757 642 11 CORD POWER C SA MX TW ANT1 1 754 160 11 ANTENNA TELESCOPIC ECM101 1 542 118 11 MICROPHONE ELECTRET CONDENSER HE101 1 500 68...

Page 24: ...d page Also clicking the version at the upper right on the revised page allows you to jump to the next revised page Ver Date Description of Revision 1 0 2001 03 New 1 1 2002 10 Correction of the classification of the power board C SA MX TW to not supplied SPM 02045 CFM 20 ...