Sony CFM-20L Service Manual Download

Page: 8 / 22

CFM-20L

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

LW IF ADJUSTMENT

Adjust for a maximum reading on level meter.

455kHz

LW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

145kHz

CT6

300kHz

LW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

160kHz

CT5

260kHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

87.00MHz

CT1

108.30MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

87.00MHz

CT2

108.30MHz

Adjustment Location :

MAIN board

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

10.7MHz

[MAIN BOARD]

(Conductor side)

CT3 : LW Frequency Coverage Adjustment
(Set to mechanical center)

CT4 : LW Tracking Adjustment
(Set to mechanical center)

CT2: FM Tracking Adjustment

CT1 : FM Frequency
Coverage Adjustment

[MAIN BOARD]

(Component side)

L5 : FM IF Adjustment

T1: LW IF Adjustment

L1: FM Tracking Adjustment

L3: LW Tracking Adjustment

L4 : LW Frequency
Coverage Adjustment

CT5 : LW Tracking Adjustment

CT6 : LW Frequency
Coverage Adjustment

L2: FM Frequency
Coverage Adjustment

Summary of Contents for CFM-20L

Page 1: ...IO CASSETTE CORDER SPECIFICATIONS AEP Model 9 873 114 11 2001D0200 1 2001 4 Sony Corporation Personal Audio Company Shinagawa Tec Service Manual Production Group Model Name Using Similar Machanism CFM 20 Tape Transport Mechanism Type MF M20 117 ...

Page 2: ...EWS 5 1 Front Cabinet Section 15 5 2 Rear Cabinet Section 16 5 3 Mechanism Deck Section 1 MF M20 117 17 5 4 Mechanism Deck Section 2 MF M20 117 18 6 ELECTRICAL PARTS LIST 19 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 OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WH...

Page 3: ... ASSY Cabinet rear ASSY Jack board Main board Batt board Power board MD 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 2 1 CABINET FRONT SUB ASSY CABINET REAR ASSY ...

Page 4: ... ASSY 4Record playback head HRP101 8Reel capstan motor M101 MD ASSY M101 Belt Flywheel ASSY Attaching belt 6Spring Compr 3Screws PTT 2X 5 7Screw 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 Cabinet rear Knob VOL Knob FUN Chassis Bracket PWB 5Screw BVTP 3X10 ...

Page 5: ...ECM101 Set the leads from microphone ECM101 as shown in the figure Set Pointer to Cabinet front as shown in the figure 4 Set the right side edge of Pointer to the scratched line on Cabinet front 3Screws 6Turn knob tune 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...

Page 6: ...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 supply voltage unless otherwise noted Torqu...

Page 7: ...1 LW Volume MIN CT3 CT4 mechanical center 0dB 1µV set test tape WS 48B 3kHz 0dB digital frequency counter J101 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 8Ω set level meter J101 Earphone jack 8Ω FM RF signal ge...

Page 8: ...evel meter L2 87 00MHz CT1 108 30MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1 87 00MHz CT2 108 30MHz Adjustment Location MAIN board FM IF ADJUSTMENT Adjust for a maximum reading on level meter L5 10 7MHz MAIN BOARD Conductor side CT3 LW Frequency Coverage Adjustment Set to mechanical center CT4 LW Tracking Adjustment Set to mechanical center CT2 FM Tracking Adjustment ...

Page 9: ...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 BIAS BIAS LINE OUT IN POWER IC1 IC101 AC IN ANTENNA L3 RADIO B REG Q101 RIPPLE FILTER FERRITE BAR FM LW FRONT END LW LW IF IN LW RF IN LW OSC OPR BATT B B RADIO B FUNCTION TAP...

Page 10: ... 5 1 25 IC1 R121 R122 C134 C7 C2 C3 R2 JC3 C1 C122 C132 R3 C18 JC1 JC2 C19 C20 R1 C15 C9 C10 JC4 C136 C125 C135 C102 C104 C107 C110 C111 C117 D1 D2 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 C12 L4 C4 C5 CNP101 R120 CNP102 KH101 KH102 C121 R113 C112 C124 Q101 C131 R132 R131 C133 S101 CNP103 2 1 C16 CF1 CF2 ...

Page 11: ... ANTENNA 1SS133 1SS133 10p 100p 0 047 10k 10 0 022 0 047 100p 4 7 50V 0 01 330 3p 22p 10p 47p 0 001 470p 47p 6 8p 18p 6 8k 470 6 3V GND B SIG GND BAND AFC QUAD FM RF OUT BAND SEL FM OSC DET OUT AGC VCC GND FM RF IN RF GND MIX OUT FM IF IN IF AMP DET FM MPX IC1 ANTENNA L3 FERRITE BAR TA2132AF LW FM LW FRONT END LW OSC LW RF IN LW IF IN FM RF CT1 CV1 CV2 CT2 CT4 CV4 CT3 CV3 CT5 CT6 LW OSC 2 2 BOARD ...

Page 12: ... 15k 22k 2 2 50V 220 22 25V 220 10V 0 01 0 01 0 47 50V 100 10V 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 0 1 0 1 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 0 022 B SIG GND BAND GND TRANSFORMER POWER T901 MIC N F NF EQ BIAS BIA...

Page 13: ...al for safety Replace only with part number specified A B Line H adjustment 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 no...

Page 14: ...IX 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 ...

Page 15: ...r in the exploded views are not supplied Hardware mark list and accessories and packing materials are given in the last of this parts list Ref No Part No Description Remark Ref No Part No Description Remark 5 1 FRONT CABINET SECTION Abbreviation CET East European Russian 2 1 1 1 2 ECM101 3 5 4 1 1 X 3380 637 1 LID CASSETTE SUB ASSY 2 X 3380 920 1 CABINET FRONT SUB ASSY INCLUDING SP101 3 3 226 062 ...

Page 16: ... 55 3 226 050 21 BUTTON FF 56 3 226 049 21 BUTTON REW 57 3 226 048 21 BUTTON PLAY 58 3 226 047 21 BUTTON REC 59 3 223 488 01 MARKER REC 60 1 680 978 11 JACK BOARD 61 3 226 018 01 BRACKET PWB 62 1 680 977 11 BATT BOARD 63 3 226 027 21 HANDLE 64 3 226 054 21 KNOB VOL 65 3 226 025 21 KNOB FUN 66 3 226 065 01 TERMINAL BATT 67 3 226 064 01 TERMINAL BATT 69 3 228 555 21 CABINET REAR AEP 69 3 228 555 31 ...

Page 17: ...WD TORSION 107 3 933 016 01 GEAR S REEL 108 3 933 023 11 SLIDER REC 109 3 933 022 01 BASE HEAD 110 3 933 017 11 SLIDER 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 CHASSI...

Page 18: ... 155 3 932 997 01 GEAR CAM 156 3 932 999 01 SLIDER SW 157 3 932 998 01 SPRING GROUND TORSION 158 3 009 648 01 LEVER S OFF 159 3 009 650 02 SPRING K COMPRESSION 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 CO...

Page 19: ...62 919 11 CERAMIC CHIP 22PF 5 50V C15 1 165 176 11 CERAMIC CHIP 0 047uF 10 16V C16 1 126 963 11 ELECT 4 7uF 20 50V C17 1 126 935 11 ELECT 470uF 20 6 3V C18 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V C19 1 164 227 11 CERAMIC CHIP 0 022uF 10 25V C20 1 165 176 11 CERAMIC CHIP 0 047uF 10 16V C21 1 162 282 31 CERAMIC 100PF 10 50V C101 1 162 966 11 CERAMIC CHIP 0 0022uF 10 50V C102 1 126 961 11 ELECT 2 2uF...

Page 20: ... FERRITE ROD ANTENNA LW LW TRACKING L4 1 424 856 11 COIL OSCILLATION LW FREQUENCY COVERAGE L5 1 409 944 11 COIL DET FM IF L10 1 410 750 41 INDUCTOR 0 47uH TRANSISTOR Q101 8 729 036 90 TRANSISTOR KTC3198BL AT RESISTOR R1 1 216 797 11 METAL CHIP 10 5 1 16W R2 1 216 831 11 METAL CHIP 6 8K 5 1 16W R3 1 216 815 11 METAL CHIP 330 5 1 16W R4 1 216 833 11 METAL CHIP 10K 5 1 16W R101 1 216 835 11 METAL CHI...

Page 21: ...101 8 814 186 00 MICROPHONE ELECTRET CONDENSER HE101 1 500 680 11 HEAD MAGNETIC ERASE HRP101 1 500 679 11 HEAD MAGNETIC RECORD PLAYBACK M101 A 3052 373 A MOTOR ASSY REEL CAPSTAN INCLUDING PULLY S501 1 762 679 11 SWITCH LEAF TAPE POWER ACCESSORIES PACKING MATERIALS 0 1 769 412 13 CORD POWER 3 228 217 32 MANUAL INSTRUCTION ENGLISH SPANISH FRENCH GERMAN AEP 3 228 217 41 MANUAL INSTRUCTION DUTCH PORTU...

Page 22: ...cking the version allows you to jump to the revised 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 04 New CFM 20L ...

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