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M-670V/673V/675V
SERVICE MANUAL
Ver 1.1 2004. 03
Tape
(MICROCASSETTE)
TM
(normal position type)
Recording system
2-track 1-channel monaural
Speaker
Approx. 2.8 cm (1
1
in.) dia.
8
Tape speed
15
2.4 cm/s (
ips), 1.2 cm/s (
16
Frequency range
300 - 4 000 Hz (with TAPE SPEED switch at 2.4 cm/s)
Input
Microphone input jack (minijack/monaural/PLUG IN POWER)
sensitivity 0.2 mV for 3 kΩ or lower impedance microphone
Output
Earphone jack (minijack/monaural) for 8 - 300 Ω earphone
Power output (at 10% harmonic distortion)
450 mW
Power requirements
3 V DC batteries size AAA (R03) x 2/External DC 3V power
sources
Dimensions (w/h/d) (incl. projecting parts and controls)
Approx. 54.8 x 106.8 x 21.5 mm (2
Sony Corporation
9-877-513-02
Personal Audio Company
2004C02-1
Published by Sony Engineering Corporation
© 2004.03
Photo : M-670V

SPECIFICATIONS

15
ips)
32
1
x 4
1
x
7
in.)
4
4
8
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
Mass (main unit only)
Approx. 92 g (3.3 oz)
Supplied accessories
AC power adaptor (1) (M-675V only), Battery charge adaptor
(1) (M-675V only), Rechargeable batteries NH-AAA, 1.2 V, typ.
800 mAh, Ni-MH (2) (M-675V only), Microcassette tape MC-
30 (1) (for the United States and Europe only), Alkaline batteries
LR03 (SG) (2) (M-673V, M-670V for the United States only),
Microphone (1) (M-673V only),Carrying pouch (1) (M-
670V:JEW/M-673V only), Battery carrying case (1) (M-675V
only)
Design and specifications are subject to change without notice.
Abbreviation
JEW : Tourist model
MICROCASSETTE
US Model
M-673V/675V
AEP Model
M-673V
E Model
Chinese Model
Tourist Model
M-670V
NEW
MZ-670-99
TM
-CORDER

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Table of Contents
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Summary of Contents for Sony M-670V

  • Page 1: Specifications

    ⁄ ips), 1.2 cm/s ( ⁄ ips) LR03 (SG) (2) (M-673V, M-670V for the United States only), Frequency range Microphone (1) (M-673V only),Carrying pouch (1) (M- 300 - 4 000 Hz (with TAPE SPEED switch at 2.4 cm/s) 670V:JEW/M-673V only), Battery carrying case (1) (M-675V...
  • Page 2: Table Of Contents

    M-670V/673V/675V TABLE OF CONTENTS Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270°C Specifications ................1 during repairing. • Do not touch the soldering iron on the same conductor of the GENERAL ..............3 circuit board (within 3 times).
  • Page 3: General

    M-670V/673V/675V SECTION 1 This section is extracted from GENERAL instruction manual. To prevent a cassette from being accidentally recorded over Recording Break off and remove the cassette tabs. To reuse the cassette for recording, cover the tab hole with adhesive tape.
  • Page 4: Disassembly

    M-670V/673V/675V SECTION 2 DISASSEMBLY • This set can be disassembled in the order shown below. Cassette lid assy Cabinet (rear) MAIN board Ceramic head (HRPE901) Mechanism deck (MZ-670-99), LED board Motor (M901) Note: Follow the disassembly procedure in the numerical order given.
  • Page 5: Main Board

    M-670V/673V/675V 2-3. MAIN BOARD knob (tape speed) (tape speed) knob (tape speed) (VOR) • CAUTIONS DURING ASSEMBLY Align these switches and knobs S501 t Knob (tape speed) (VOR) S601 t Knob (tape speed) (tape speed) S601 1 Remove solder (sixteen places)
  • Page 6: Ceramic Head (Rec/Pb/Erase) (Hrpe901)

    M-670V/673V/675V 2-5. CERAMIC HEAD (REC/PB/ERASE) (HRPE901) 2 arm (pinch roller) assy 3 M1.4, special head 4 M1.4, special head 5 ceramic head 1 claw (HRPE901) 2-6. MOTOR (M901) How to apply the belts belt (flywheel) belt (counter, tape) flywheel assy...
  • Page 7: Adjustments

    M-670V/673V/675V SECTION 3 ADJUSTMENTS 3-1. MECHANICAL ADJUSTMENTS 3-2. ELECTRICAL ADJUSTMENTS 0db=0.775V PRECAUTION Standard Output Level Output terminal 1. Before adjusting, clean the following parts with a piece of Load impedance 8Ω cotton moistened with alcohol. record/playback/erase head pinch roller Output level 78mV (–...
  • Page 8 M-670V/673V/675V Tape Speed Adjustment Switch position VOLUME : Mechanical center VOR switch : OFF Procedure : After adjusting the 2.4cm/s speed, adjust the 1.2cm/s speed. – Playback – Test tape frequency counter WS-24, WS-12 (3kHz, –10dB) 8 Ω J102 earphone jack...
  • Page 9: Diagrams

    M-670V/673V/675V SECTION 4 DIAGRAMS 4-1. BLOCK DIAGRAMS +1.7V REG. IC401 +VCC PRE AMP Q303 IC101 (1/2) POWER ON +VCC VOUT DETECT RFLT Q307 RFLT IN RIPPLE BTL POWER AMP FILTER IC101 (2/2) J101 PRE2 IN PRE OUT SP IN PRE2 NF...
  • Page 10: Printed Wiring Boards- Main Section (Side A)

    M-670V/673V/675V 4-2. PRINTED WIRING BOARD – MAIN BOARD (SIDE A) – MAIN BOARD (SIDE A) Q702 • Semiconductor E C B S602 Location D701 FAST PB C B E Ref. No. Location BATT Q701 C312 D302 E B C D701...
  • Page 11: Printed Wiring Boards- Main Section (Side B)

    M-670V/673V/675V PRINTED WIRING BOARD – MAIN BOARD (SIDE B) – HRPE901 RECORD/ (SIDE B) MAIN BOARD PLAYBACK/ S301 ERASE PAUSE HEAD R320 R315 TP34 TP17 Q303 Q305 Q307 BOARD TP32 W702 W704 R314 RV101 Q704 TP24 Q705 IC701 D702 W701...
  • Page 12: Schematic Diagram

    M-670V/673V/675V 4-3. SCHEMATIC DIAGRAM...
  • Page 13: Ic Block Diagrams

    M-670V/673V/675V 4-4. IC Block Diagrams IC101 BH3682FV BIAS PWRVCC PREVCC PWRCTRL 26dB REC/POWER PRE1 MICALC/PRE2 22dBSE 0dBSE 31dB 37dB BH3682FV TapeRecorder PRE/PWR MIC/REC delta: 40dB RIPL VORCTRL IC601 LB1979VS-TLM-E SPEED CONTROL STARTING OSCILLATING REFERENCE VOLTAGE DETECT CIRCUIT WAVEFORM DETECT COMMUTATION STARTING LOGIC...
  • Page 14: Exploded Views

    M-670V/673V/675V Ver 1.1 SECTION 5 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • Hardware (# mark) list and accessories are have some differences from the original one. given in the last of this parts list.
  • Page 15: Cabinet (Front) Section

    M-670V/673V/675V 5-2. CABINET (FRONT) SECTION 67 68 MIC1 not supplied mechanism deck section (MZ-670-99) Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-704-197-31 LOCK, SERRAT IB 3-328-319-01 STRAP, HAND 3-831-441-99 SPACER, KNOB 3-258-285-11 CABINET (FRONT) A-4541-601-A MAIN BOARD, COMPLETE...
  • Page 16: Mechanism Deck Section (Mz-670-99)

    M-670V/673V/675V 5-3. MECHANISM DECK SECTION (MZ-670-99) M901 HRPE901 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-028-965-01 SPRING (PINCH ARM), TORSION 3-028-957-01 SPRING (CAM GEAR),TENSION 3-028-966-14 GEAR (S-OFF-OW), CAM 3-365-611-11 SCREW (M1.4X1.4), SPECIAL HEAD X-3376-230-5 LIMITTER ASSY 3-232-536-22 SCREW (M1.4) (EG)
  • Page 17: Electrical Parts List

    M-670V/673V/675V Ver 1.1 SECTION 6 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • RESISTORS parts list may be different from the parts All resistors are in ohms. The components identified by mark 0 specified in the diagrams or the components...
  • Page 18 M-670V/673V/675V Ver 1.1 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks Q302 8-729-928-81 TRANSISTOR DTC144EE R603 1-218-989-11 RES-CHIP 1/16W Q303 8-729-928-19 TRANSISTOR 2SA1774R R604 1-218-977-11 RES-CHIP 100K 1/16W Q304 8-729-013-37 TRANSISTOR 2SC4213-AB-TE85L Q305 8-729-928-19 TRANSISTOR 2SA1774R...
  • Page 19 M-670V/673V/675V Ver 1.1 Ref. No. Part No. Description Remarks 3-220-749-01 CASE, CARRYING (for set)(670V:JEW,673V) 3-259-967-01 MANUAL, INSTRUCTION (JAPANESE)(670V:JEW) 3-259-967-11 MANUAL, INSTRUCTION (ENGLISH, SPANISH)(673V:US,675V) 3-259-967-31 MANUAL, INSTRUCTION (ENGLISH,SPANISH,ITALIAN,PORTUGUESE) (670V:E) 3-259-967-51 MANUAL, INSTRUCTION (ENGLISH,RUSSIAN) (670V:EE) 3-259-967-61 MANUAL, INSTRUCTION (CZECH,HUNGARIAN,POLISH,SLOVAKIAN) (670V:EE) 3-259-967-71 MANUAL, INSTRUCTION...
  • Page 20 Clicking 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 2004.02 2004.03 Delete of M-670V Canadian and AEP models. (ENG-04009)

This manual is also suitable for:

M-673vM-675v

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