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Sony CFS-B5SMK2 Service Manual

Radio cassette-corder
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SERVICE MANUAL
Ver 1.0 1998. 06
Frequency range
FM
Saudi Arabia model
Other countries model
MW
SW1
SW2
Aerials
FM/SW: Telescopic antenna
MW: Built-in ferrite bar
Recording system
4-track, 2-channel stereo
Frequency response
70 - 10,000 Hz
Speakers
Full range: 10 cm (4 inches) dia.,
2.8 ohms cone type × 2
Output
Headphones jack (stereo minijack),
for 16 - 68 ohms impedance headphones
Maximum Power output
2.5 W + 2.5 W
MICROFILM
CFS-B5SMK2
SPECIFICATIONS
87.6 - 107 MHz
87.6 - 108 MHz
530 - 1,605 kHz
2.3 - 7 MHz
7 - 22 MHz
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
Battery life
FM recording
Sony R20P: approx. 16 hours
Sony LR20 alkaline: approx. 36 hours
Playback
Sony R20P: approx. 8 hours
Sony LR20 alkaline: approx. 21 hours
Power requirements
110 - 120 V/220 - 240 V AC
selectable, 50/60 Hz
9 V DC, six R20 (size D) batteries
Power consumption
AC 14 W
Dimensions
Approx. 500 × 155 × 164 mm (w/h/d)
× 6
× 6
(19
inches) incl. projecting parts
3/4
1/8
1/2
and controls, not incl. handle
Mass
Approx. 2.7 kg (5 lb. 15 oz.) not incl. batteries
Supplied accessory
Mains lead (1)
Design and specifications are subject to change without
notice.
RADIO CASSETTE-CORDER
– 1 –
E Model
NEW
MF-B5MK2-117

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Summary of Contents for Sony CFS-B5SMK2

  • Page 1 87.6 - 107 MHz FM recording Other countries model 87.6 - 108 MHz Sony R20P: approx. 16 hours 530 - 1,605 kHz Sony LR20 alkaline: approx. 36 hours 2.3 - 7 MHz Playback 7 - 22 MHz Sony R20P: approx. 8 hours Aerials Sony LR20 alkaline: approx.

  • Page 2: Table Of Contents

    COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
  • Page 3 SECTION 1 GENERAL This section is extracted from instruction manual. – 3 –...
  • Page 4 – 4 –...

  • Page 5: Disassembly

    SECTION 2 DISASSEMBLY • The equipment can be removed using the following procedure. Set / Front cabinet assy / Chassis (TUNE) / Tape mechanism block / Tuner, AC, Second board / Audio, Microphone board Note : Follow the disassembly procedure in the numerical order given. 2-1.

  • Page 6: Tape Mechanism Block

    2-3. TAPE MECHANISM BLOCK 3 CN601 4 tape mechanism block 2 CN301 1 BVTP 3x10 2-4. TUNER, AC, SECOND BOARD !¡ SECOND board 1 knob (FINE TUNE) 8 BVTP 3x10 6 CN911 0 AC board 9 BVTP 3x10 7 CN901 3 BVTP 3x10 4 CN1 2 BVTP 3x10...

  • Page 7: Audio, Microphone Board

    2-5. AUDIO, MICROPHONE BOARD 1 knob (VOL) 2 knob (TONE) 3 chassis (MD) 6 MICROPHONE board 5 SUPPORT board 9 lever (FUNCTION) 4 BVTP 3x10 7 BVTP 3x10 8 AUDIO board 2-6. DIAL POINTER SETTING 2 Set the pointer to the center of scratched lines.

  • Page 8: Mechanical Adjustments

    SECTION 3 SECTION 4 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS PRECAUTION 4-1. TAPE SECTION 0 dB = 0.775 V 1. Clean the following parts with a denatured alcohol-moistened swab : Standard Output Level record/playback head pinch roller Output terminal HP OUT erase head rubber belts 32 Ω...

  • Page 9: Tuner Section

    0 dB = 1 µV 4-2. TUNER SECTION FM FREQUENCY COVERAGE ADJUSTMENT • FM Section Adjust for a maximum reading on level meter. Setting: BAND switch: FM 86.5 MHz (87.35 MHz) 109.5 MHz (107.8 MHz) FM RF signal generator FM TRACKING ADJUSTMENT telescopic antenna input Adjust for a maximum reading on level meter.
  • Page 10 FM VCO Adjustment Setting: FM RF SSG 0.001 µ F telescopic antenna input Modulation: no modulation Output level: 0.1 V (100 dB) Procedure: 1. Adjust RV1 so that the reading on the frequency counter becomes in 76.0 kHz ± 50 Hz. Adjustment Location: tuner board Adjustment Location: –tuner board (component side)–...

  • Page 15: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • -XX and -X mean standardized parts, so • Accessories and packing materials and number in the e xploded vie ws are not supplied. the y ma y ha ve some diff erence from the hardw are (# mar k) list are giv en in •...

  • Page 16: Rear Cabinet Section

    6-2. REAR CABINET SECTION ANT1 T901 J301 F901 not supplied MF-B5MK2-117 MIC301 The components identified b y mark ! or dotted line with mark. ! are cr itical for saf ety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref.

  • Page 17: Mechanism Deck Section (1)

    6-3. MECHANISM DECK SECTION (1) (MF-B5MK2-117) HRP101 HE101 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-933-010-01 SPRING (S/P), TORSION * 112 3-008-587-01 SLIDER (STOP) 3-933-025-01 SPRING (P), TORSION * 113 3-008-591-01 SLIDER (P AUSE) 3-933-026-01 LEVER (P) 3-933-004-01 CLA W, REEL...

  • Page 18: Mechanism Deck Section (2)

    6-4. MECHANISM DECK SECTION (2) (MF-B5MK2-117) S902 M901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-933-029-01 LEVER, ERASING PREVENTION X-3373-572-1 REEL ASSY (N), T 3-933-182-01 SPRING, CASSETTE 3-933-020-01 BEL T 3-932-995-01 GEAR (MID) X-3372-924-1 FLYWHEEL ASSY X-3371-667-1 CLUTCH ASSY 3-932-993-01...

  • Page 19: Electrical Parts List

    SECTION 7 AUDIO ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items mar ked “*” are not stoc ked since The components identified b y mark ! or dotted line with mark. the par ts list ma y be different from the the y are seldom required f or routine ser vice.
  • Page 20 AUDIO BATTERY MICROPHONE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < DIODE > R291 1-247-807-11 CARBON 1/4W R296 1-249-417-11 CARBON 1/4W D351 8-719-911-19 DIODE 1SS119 R301 1-249-407-11 CARBON 1/4W D352 8-719-123-54 DIODE RD5.6ES-L3 R306 1-249-433-11 CARBON 1/4W D353...
  • Page 21 SECOND SUPPORT TUNER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-670-173-11 SECOND BOARD 1-124-902-00 ELECT 0.47uF 1-126-963-11 ELECT 4.7uF ************** 1-126-956-11 ELECT 0.1uF < CAP ACIT OR > 1-162-203-31 CERAMIC 15PF 1-161-050-00 CERAMIC 0.0082uF C901 1-101-005-00 CERAMIC 0.022uF...
  • Page 22 TUNER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < COIL > MISCELLANEOUS ************** 1-406-998-11 COIL, AIR-CORE (EXCEPT EA) 1-406-999-11 COIL, AIR-CORE (EA) 1-569-008-21 ADAPTOR, CONVERSION 2P (EA) 1-406-957-21 COIL (WITH CORE) (EA) 1-769-412-11 CORD, POWER 1-422-230-11 COIL, AIR-CORE (EXCEPT EA) ANT1...
  • Page 23 CFS-B5SMK2 Sony Corporation 98G047026-1 Printed in Singapore C1998. 7 9-924-937-11 Personal A&V Products Company Published by Quality Engineering Dept. – 28 – (Shibaura)

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