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Toshiba M-672 Service Manual

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TOSHIBA
FILE NO. 120-9601
RDER
M - 6 7 2 , M - 6 7 2 C
M - 6 5 , M - 6 5 C
PRINTED IN KOREA, MAY, 1996

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  • Page 1 TOSHIBA FILE NO. 120-9601 RDER M - 6 7 2 , M - 6 7 2 C M - 6 5 , M - 6 5 C PRINTED IN KOREA, MAY, 1996...
  • Page 2: Disassembly And Reassembly

    2. DISASSEMBLY & REASSEMBLY 2-1. INSTRUMENT DISASSEMBLY 2-l-3. Front Panel Removal 2-l-l. Bottom Cover Removal 1. Remove bottom cover and top cabinet (See Fig. 1 to 1. Remove two (2) screws holding the bottom cover. 2. Release three (3) tabs from the bottom of the front 2.
  • Page 3: Main Circuit Board Removal

    2-2-3. Main circuit board Removal 2-2-l. Function PCB Removal Follow the procedures for removing the bottom cover, 1 .Follow the procedures for removing Fig. 1 to 6 the top cabinet and the panel front. (See Fig.1 to 3) 2.Release three (3) tabs from the frame. 2.
  • Page 4 Fig. 7 Instrument Assembly Removal ( @, @I 1 1. Remove screws and release the bottom cover. ( (D, @, @I 1 2. Remove screws and release the top cover. 3. Release the front panel as shown in Fig. 3 4.
  • Page 5 TIGHTEN THE SCREW Fig. 8 Trouble Shooting Posture 1. Set the main PCB & DECK ass’y as shown in Fig. 8. 2. Tighten the screw. 3. Install the Function PCB to Main PCB...
  • Page 6 2-5. TAPE TRANSPORT MECHANISM IDENTIFICATION 2-5-l. Deck (lop View) 13 14 (Top View) ) Fig.9 Deck Parts Locations 11. ARM REVIEW ASS’Y FULL ERASE HEAD 21. GEAR RELAY “T” ASS’Y 12. UNIT PINCH ROLLER ASS’Y STOPPER TAPE 22. IDLER ASS’Y SLIDE GEAR LOADING ASS’Y “T”...
  • Page 7 2-5-2. Deck (Bottom View) Locations (Bottom View) Fig. 10 Deck Parts 8. SLIDE MAIN 1. LEVER SLIDE PINCH 9. LEVER REC SWITCH 2. MOTOR D.D CAPSTAN 10. LEVER IDLER CHANGE 3. BELT CAPSTAN 11. CLUTCH ASS'Y 4. BRAKE CAPSTAN ASS’Y 12.
  • Page 8: Housing Assembly

    2-6. Housing Assembly Fig. 11 Housing Parts Locations 1. CHASSIS SIDE ‘I” ASS’Y 2. UPPER CHASSIS 3. CHASSIS SIDE “R” ASS’Y 4. SHAFT ARM ASS’Y 5. HOLDER CASSETTE ASS’Y 6. LEVER DOOR ASS’Y 7. DOOR LOCK 2 - 7...
  • Page 9 2-6-l. Removal from Main Base 1) Remove three(3) screws 0. 2) Lift the housing ass’y in the direction of arrow ‘B’ while pushing the tab a in the direction of arrow ‘A’. (Refer to detail drawing) MAIN BASE NOTE : When p ushing the tab(2) in the direction of arrow “A”, take extreme care not to damage <DETAIL>...
  • Page 10 2-6-2. Disassembly - CHASSIS UPPER ASSEMBLY CHASSIS SIDE ‘L’ SIDE” R " SHAFT ARM ASSEMB Fig. 13 Housing Ass’y Removal...
  • Page 11 2-6-3. Upper Chassis Removal Remove two(2) screws a. 21 Lift the upper chassis QI in the direction of arrow ‘A’ Fig. 14 Upper Chassis Removal 2-10...
  • Page 12 2-6-4. Holder Cassette Ass’y & Chassis Side L/R Removal Lift the holder cassette (D in the direction of arrow ‘A’ (Refer to Fig. A). 2) Remove the chassis side ‘C @ & ‘R’ @ from shaft arm ass’y @ in the direction of arrows ‘B’, ‘C’ (Refer to Fig. B). NOTE If you operate the deck when the holder cassette ass’y is removed, the shaft arm “R’...
  • Page 13 (SIDE VIEW “A”) SPRING CHASSIS SIDE “R LEVER-LID OPENER SLIDE - DAMPER SPRING-SLIDE DAMPER Fig. 16 Chassis Side ‘R’ Parts Locations 2-12...
  • Page 14 2-6-6. Slide Damper Removal 2) Push the stopper @ of the chassis side ‘R’ @. Move the slide damper @ in the direction of arrow. 3) Align the slide damper QI with the chassis side tab (as shown detail drawing). 4) Lift the slide damper @ to remove.
  • Page 15: Cylinder Ass'y

    2-7-2. Stopper Tape 2-7. Cylinder Ass’y 2-7-l. Exploded View of Cylinder Ass’y ONE SCREW (Only for deck (Refer to detail drawing) HEAD BRUSH SCREWS Fig. 19 Stopper Tape Removal SCREWS CYLINDER BASE Fig. 18 Exploded View of Cylinder Ass’y 2-14...
  • Page 16 2-7-3. Cylinder Ass’y Removal from Main Base 2-7-4. Head Brush & Holder FPC Removal Remove threef3) screws @ holding the main base and the cylinder ass’y. 2) Release the holder FPC tab holding the cylinder base @ 2) Lift the cylinder ass’y Q in the direction of arrow. in the direction of arrow.
  • Page 17 2-7-7. Motor Rotor & Cylinder Sub Ass’y 2-7-5. Cylinder Ass’y Removal from Cylinder Base 1) Make sure that phase matching holes of the motor rotor 1) Remove three(3) screws 0 from the cylinder base @. 2) Lift the cylinder ass) @from the cylinder base (p in the Fig.
  • Page 18 2-8. Main Deck Removal & Reassembly 2-7-9. Motor Stator & Cylinder Sub Ass’y 2-8-l. Slide Rack Housing Removal cylinder sub ass’y Q. SLIDE RACK HOUSING . @ MOTOR - STA Fig. 27 Slide Rack Housing Removal SUB ASS’Y 2-8-2. Assembly of Slide Rack Housing & Gear Master of main base are aligned correctly.
  • Page 19 2-8-3. Brake Sub “L” Removal 2-8-5. Reel Disk ‘I” Ass’y & Gear Relay “s” Ass’y Removal 2) Release the tab Q) in the direction of arrow. (Refer to detail drawing) (Refer to detail drawing) 3) Lift the brake sub ‘L 0. 3) Remove the washer plain a.
  • Page 20 2-8-8. Brake Main “L”, “R” Ass’y Removal 2-8-6. Brake Sub “R” Ass’y Removal 1) Remove the spring brake main @. 1) Remove the spring brake sub ‘R’ a. 2) Release the tab a in the direction of arrow ‘A’. 2) Release the tab Cp in the direction of arrow. (Refer to detail drawing ‘A’) (Refer to detail drawing) 3) Lift the brake main ‘L’...
  • Page 21 2-8-12. Exploded View of Lever Pinch Comp Ass’y, 2-8-10. Unit Pinch Roller Ass’y Removal Lever Pinch Cam, Arm Review Ass’y & Lever Review Ass’y 1) Remove the washer slit (D. LEVER-PINCH COMP ARM-REVIEW ASSY LEVER-REVIEW LEVER-PINCH CAM Fig. 38 Exploded View of Lever Pinch Comp Ass’y, Lever Pinch Cam, Arm Review Ass’y 81 Lever Review Ass’y Fig.
  • Page 22 2-8-14. Lever Pinch Cam Removal 2-8-18. Lever Review Removal 1) Release the tab (j) in the direction of arrow. 1) Release the tab a in the direction of arrow. (Refer to detail drawing) (Refer to detail drawing) 2) Lift the lever review a. 2) Lift the lever pinch cam a.
  • Page 23 2-8-20. Clutch Ass’y Removal Brake Capstan Ass’y Removal 2-8-18. 1) Remove the washer slit a>. 1) Remove the spring brake capstan (J). ass’y QI. 2) Release the tab Q in the direction of arrow. 2) Lift the clutch (Refer to detail drawing) 3) Remove the washer plain @.
  • Page 24 2-8-24. Lever Slide Pinch Removal 2-8-22. Assembly of Gear Master 1) Remove the washer slit a. 1) When reinstalling, be sure to align the arrow mark of 2) Lift the lever slide pinch a, gear master a with gear home of gear worm wheel a (Refer to timing point) UNIT LOADING Fig.
  • Page 25 2-8-27. Assembly of Slide Main 2-8-28. Slide Main Removal 1) Install the shaft of gear loading ‘R’ ass’y into the left of 1) Remove the washer slit a. the main slide hole and secure with the washer slit a. 2) Release three(3) tabs QI, @, @ in the direction of arrow. (Refer to ‘A’) 3) Lift the slide main 6).
  • Page 26 2-8-30. Gear Loading ‘I”, “R” Ass’y Removal 1) Remove the gear loading ‘R’ ass’y @ from the slide 1) Hang the spring lever shift (D to the claw of the lever guide roller ‘T (3, by pushing the spring loading ‘R’ a shift @.
  • Page 27 2-8-34. Prism LED Removal Release the tab @ in the direction of arrow. (Refer to detail drawing) (Refer to detail drawing) PRISM LED Fig. 59 Slide Pinch Removal Fig. 61 Prism LED Removal 2-8-33. Slide Push Removal 2-8-35. Lever Record Switch Removal 1) Remove the spring slide push 0.
  • Page 28 2-8-36. Full Erase Head Removal Remove the cylinder ass’y from the main base. Remove one0 screw Q). (Refer to Fig. 19, 20) ass’y. (Refer to Fig. 58) to remove. (Refer to arrow) Fig. 63 Full Erase Head Removal 2-8-37. ACE Head Removal & Reassembly (Refer to detail drawing ‘A’) 3) Lift the magnet ACE head ass’y @.
  • Page 29 2-8-39. Slide Guide Roller “S”, “T” Ass’y (When all parts except the cylinder assembly are removed.) 1) Push four(4) Lever Locks a of the housing ass’y Simultaneously. (Refer to Fig. 66) 2) Push the holder cassette ass) @toward arrow ‘B’ while turning the gear master Q toward arrow ‘A’.
  • Page 30 3-2. TAPE TRANSPORT SYSTEM 3-2-l. Location of Tape Transport Adjustment (Adjustment Reference) The lower flange height of the tape guide is used as the basic reference point for transport adjustments. To keep the height of the tape guide, do not apply excessive force onto the main base to prevent damage. FULL ERASE PINCH ROLLER TENSION POLE...
  • Page 31 3-2-2. Tape Transport System Adjustment 1) Pm-adjustment SCREW(C) When parts are replaced, perform the required adjustments TILT ADJUST by referring to the procedures for the tape transport system. When parts are replaced, the tape path may be changed. X - POSITION First run a T-l 60 tape and be sure excessive tape wrinkle ADJUST GEAR(E).
  • Page 32 2. Linearity adjustment (S,%guide rollers c. Audio azimuth adjustment adjustment) Connect the channel-l scope probe to TP804. Test Pornt 3. Adjust screw (B) vertically to achieve maxrmum audro level. (See Fig. 4) TP202 (H’D SW Pulse Test Taoe (Mono Scooe d.
  • Page 33 4. If the section A in Fig. 11 does not meet the 6 Slightly loosen the set screw at the lower part of the S, T-guide rollers with a (Hex Wrench specification, adjust the S-guide roller up or down the guide roller can be adjusted with reasonable specification, adjust T-guide roller up or down.
  • Page 34: Tape Wrinkle Check

    5 Tape wrinkle check 3. Check for transitional operation from R.P.S to play 1. Run T-l 60 tape in playback, FPS, RPS and the pause mode and observe tape wrinkle at each Check transition from R.P.S mode to play mode, using guide.
  • Page 35: Reel Torque

    3-3. REEL TORQUE 3-3-l. Reel Torque 1. The rotation of the capstan motor operates the clutch ass’y through the capstan motor belt. 2. Brake operation and shift operation in FWREW are done by a slide lever. F/E HEAD- 3. Transmission of accurate driving force is done by gears.
  • Page 36 4-2. SERVO/VIDEO SECTION ADJUSTMENT !. CCD COMB Head Switching Point control to receive LINE signal I) “PB”, Alignment tape color bars. the VCR to REC mode. triggering and CH-2 to TP802. on the color bar signal. is positioned 6.5 + 0.5H from the V-SYNC Ic edge as shown.
  • Page 37: Packing Assembly

    7-1. PACKING ASSEMBLY...
  • Page 42 7-6. REMOTE CONTROL ASSEMBLY AT0 I A T 0 6...
  • Page 89: Replacement Parts List

    6. REPLACEMENT PARTS LIST 6-1. REPLACEMENT PARTS LIST FOR M-472,M-462,M-45 The PC board assembly with * mark is no longer available after the production. For M-462,M-45 different parts only are I isted o n t h e d i f f e r e n c e l i s t . P A R T S N O .
  • Page 90 different parts only are listed on the difference list. H510 70790581 62202-0103-00 70790645 63322-0317-00 HOLDER-CASSETTE(ASSY);SECC 70790641 63321-0314-00 H522 70790540 T1.2 H523 70790542 61533-0104-00 LEVER-LCCK(L);SECC T1.2 H524 70790618 62724-0220-00 SPRING-LEVER LOCK;ES SUS304WPB P10.2 ID2 H525 70790618 62724-0220-00 SPRING-LEVER LCCK;ES SUS304WPB P10.2 ID2 H526 70790541 61533-0103-00...
  • Page 91 SCREW-TAP TITE BH;3XlO FE FZY 70796352 MANUAL M-472 ENG/SPA ELECTRICAL PARTS - * U621 70796404 69657-301-277 ASSY MAlN;M-472 70796240 70795271 SIP TAPG 70796016 70796383 70796236 70796235 DIP BULK 70796234 70796299 70796388 M-672 70795131 62119-401-300 70796390 70795269 70796298 84012-0110 70795803 70795803 62119-401-310 70796384...
  • Page 92 NOTE : different parts only are listed on the difference list. PARTS NO. REPLACEMENT NO. 70795647 40W IOMHZ Sl/NPN 62139-301-311 62147-401-835 62137-701-010 62147-401-835 70795817 62137-701-012 1003 TAPG 0102 62137-302-441 2328-Y TAPG 0103 70795135 62137-302-441 2328-Y TAPG 0104 70795135 0201 70795496 70795134 62137-103-380 733-Y TAPG...
  • Page 93 NOTE : o n t h e d i f f e r e n c e l i s t . PARTS NO. REPLACEMENT NO. 70735150 62169-406-482 0102 70796385 70796385 70795150 62169-406-482 0202 70795150 62169-406-482 0203 70795150 62169-406-482 D204 70795150 62169-406-482 0205...
  • Page 94 This parts listed on the base model M-472. For M-462,M-45 different parts only are listed on the difference list. REPLACEMENT NO. PARTS NO. 70795438 ZD32 DIODE-ZENER;UZP-43B 40/46V IOMA T 62169-403-838 70796360 Al100-0536 All00-0423 All00-0580 70795417 45 B 400V T 3300-M SCF2G332Ml6BS 70795252 All00-0450 70795417...

This manual is also suitable for:

M-372cM-65M-662cM-65cM-45M-472 ... Show all