Sony DV-MECHA Service Manual

DV MECHANICAL ADJUSTMENT MANUAL V

Ver 1.0 2000. 10

R MECHANISM

Please use this manual with the service manual.

For details on printed circuit boards diagram, schematic diagram, and electric parts list regarding this mechanism deck, refer to the service manual for the unit mounting the R mechanism.

MECHANISM DECK

TABLE OF CONTENTS

1. PARTS REPLACEMENT AND PREPARATION FOR ADJUSTMENT

1-1. ASSEMBLY/DISASSEMBLY OF CASSETTE

COMPARTMENT ······························································ 4

1-2. HOW TO LOAD/UNLO AD··············································· 4 1-3. Service Jigs and Tools ························································ 5 1-4. About Mode Selector II ······················································ 6 4-1. OUTLINE··········································································· 6

1. Manual test ········································································· 6

2. Step test ··············································································6

3. Auto test ·············································································6

4-2. MECHANISM CONDITION (POSITION)SHIFTING

ORDER LIST ····································································· 6

4-3. MODE SELECTOR II CONNECTION ····························6

2. PERIODIC CHECK

2-1. CLEANING OF ROTARY DRUM ASSEMBLY ·············· 7 2-2. CLEANING OF TAPE PATH SYSTEM ··························· 7 2-3. PERIODIC CHECKS·························································7

3. PARTS REPLACEMENT

3-1. TAPE GUIDE 1/8 AND GUIDE GUARD·························8 3-2. TAPE GUIDE 2/7 ······························································· 8 3-3. CAPSTAN COVER ···························································· 9 3-4. REEL MOTOR··································································· 9 3-5. FL MOTOR ASSEMBLY, GEAR A, GEAR B AND

GEAR CD ASSEMBLY ····················································· 9

3-6. GL ARM S ASSEMBLY, GL ARM T ASSEMBLY,

COASTER S ASSEMBLY AND COASTER T ASSEMBLY ·····································································10

3-7. MIC BASE GUIDE, MIC BASE ASSEMBLY AND

MIC BASE SPRING ························································ 11

3-8. DRUM CAP, DRUM ASSEMBLY AND TAPE

SUPPORT········································································· 11

3-9. PINCH ARM ASSEMBL Y ··············································12 3-10. CAPSTAN MOTOR ························································· 12 3-11. PENDULUM RETAINER AND PENDULUM ARM

ASSEMBLY ·····································································12

3-12. BRAKE ARM S, RATCHET BRAKE T, TENSION

COIL SPRING (BRAKE), SBR SLIDER AND FP-248 FLEXIBLE BOARD (CONDENSATION SENSOR) ·····13

3-13. REEL TABLE ASSEMBLY, IDLER GEAR A

ASSEMBLY AND IDLER GEAR B ·······························13

3-14. REEL BASE RETAINER, REEL BASE T ASSEMBLY

AND REEL BASE S ASSEMBLY (REEL LOCK RELEASE BLOCK AND REEL LOCK RELEASE SPRING) ························································ 14

3-15. CAM MOTOR, MOTOR HOLDER ································ 14 3-16. TG2/7 ARM BLOCK, TG2/7 BAND BLOCK AND

TENSION COIL SPRING (TG2)/(TG7) ························· 15

3-17. SUB-SLIDER ARM, SUB-SLIDER, ENCODER GEAR,

MAIN CAM GEAR, COUPLING GEAR, SUB-CAM GEAR, PINCH SLIDER AND LOADING ARM ASSY ·· 16

3-18. MAIN SLIDER, MAIN SLIDER ARM AND

PENDULUM STOPPER ASSEMBLY ···························· 18

3-19. MD-76 BOARD AND ENCODER RETAINER ·············· 19 3-20. COMPONENTS OF GL ARM S/T ASSEMBLY

(GL ARM ASSEMBLY, GL HELICAL TORSION SPRING, GL GEAR) ······················································· 20

3-21. COMPONENTS OF MIC BASE ASSEMBLY

(FP-104 FLEXIBLE BOARD, MIC BASE) ···················· 20

3-22. COMPONENTS OF DRUM ASSEMBLY

(MOTOR FPC ASSEMBLY, ELASTIC CONNECTOR) ·· 21

3-23. COMPONENTS OF PINCH ARM ASSEMBLY

(TAPE RETAINER, COMPRESSION COIL SPRING)·· 21

3-24. COMPONENTS OF TG2/7 ARM ASSEMBLY

(ET MAGNET, MAGNET HOLDER)····························· 21

4. CHECK AND ADJUSTMENT

4-1. REEL TABLE HEIGHT CHECK AND ADJUSTMENT 23

1. Preparation before check ·················································· 23

2. Check and adjustment ······················································ 23 4-2. TG1/8 HEIGHT CHECK AND ADJUSTMENT ············· 23

1. Preparation before check ·················································· 23

2. Check and adjustment ······················································ 23 4-3. TG2/7 HEIGHT CHECK AND ADJUSTMENT ············· 24

1. Preparation before check ·················································· 24

2. Check and adjustment ······················································ 24 4-4. FWD/RVS POSITION CHECK AND ADJUSTMENT ·· 24

1. Preparation before check ·················································· 24

2. Check and adjustment ······················································ 24 4-5. ELECTRIC TENSION REGULATOR CHECK AND

ADJUSTMENT OF TG2/7 ARM ···································· 25

1. Preparation before check ·················································· 25

2. Check and adjustment ······················································ 25 4-6. FWD/RVS BACK TENSION CHECK AND

ADJUSTMENT································································26

1. Preparation before check ·················································· 26

2. Check and adjustment ······················································ 26 4-7. PREPARATION FOR ADJUSTMENT AND

TAPE PATH CHECK ······················································· 26

4-8. TRACK ADJUSTMENT AND CHECK

(Checking the RF Waveform)···········································27 4-9. TRACK CHECK ······························································ 27 4-10. CUE/REV CHECK ·························································· 28 4-11. CURL CHECK AND ADJUSTMENT ···························· 28 4-12. RISING CHECK ······························································ 29

5. REPAIR PARTS LIST

5-1. EXPLODED VIEWS ······················································· 30 5-1-1.DRUM SECTION ···························································· 30 5-1-2.GEAR, ARM SECTION ·················································· 31 5-1-3.MOTOR, MD-76 BOARD SECTION ····························· 32 5-1-4.CASSETTE COMPARTMENT BLOCK ASSEMBLY··· 33 5-2. ELECTRICAL PARTS LIST ··········································· 34

6. PRINTED WIRING BOARD AND

SCHEMATIC DIAGRAM

• MD-76 (MODE SENSOR) PRINTED WIRING BOARD ·························· 35

• MD-76 (MODE SENSOR) SCHEMATIC DIAGRAM ······························· 37

— 2 —

assigned to each part in the exploded views of Section 5, “Repair

Tape guide 1

(Drawing numbers: 710 to 714)

Cassette

compartment

(Drawing numbers:

722, 851)

FL motor block

(Drawing numbers: M905, 853 to 856)

GL arm S/T block

(Drawing numbers: 810 to 817)

Coaster S/T Block

(Drawing numbers: 801 to 802)

MIC base guide

(Drawing numbers: 702)

MIC base assembly

(Drawing numbers: 701, 703, 723, 724, CN004, S004)

Drum cap

(Drawing numbers: 721)

Drum assembly

(Drawing numbers: M901)

Tape support

(Drawing numbers: 717)

Pinch arm assembly

(Drawing numbers: 718 to 720)

Capstan cover

(Drawing numbers: 819)

Capstan motor

(Drawing numbers: M903)

Tape guide 8

(Drawing numbers: 710 to 714)

Tape guide 2

(Drawing numbers: 776 to 780)

Tape guide 7

(Drawing numbers: 776 to 781)

Guide guard

(Drawing numbers: 715)

Capstan cover

(Drawing numbers: 819)

Reel motor

(Drawing numbers:

M904)

Pendulum retainer

(Drawing numbers: 705)

Pendulum

retainer

(Drawing

numbers: 705)

Pendulum arm assembly

(Drawing numbers: 706)

Brake arm S/Ratchet brake T

(Drawing numbers: 707, 708, 709)

SBR slider

(Drawing numbers: 757)

Cam motor

(Drawing numbers: M902)

Idler gear A/B

(Drawing numbers: 751, 752)

Motor holder block

(Drawing numbers: 763, 764, M902)

TG2 arm/TG2 band block

(Drawing numbers: 766, 768, 771 to 775)

TG7 arm/TG7 band block

(Drawing numbers: 767, 769, 770, 775)

Sub-slider arm

(Drawing numbers: 761)

Sub-slider

(Drawing numbers: 758)

Main cam gear

(Drawing numbers: 755)

Coupling gear

(Drawing numbers: 762)

Sub-cam gear

(Drawing numbers: 756)

Pinch slider

(Drawing numbers: 760)

Loading drive lever

(Drawing numbers: 759)

Main slider

(Drawing numbers: 820)

Brake arm S

(Drawing numbers: 708)

Main slider arm

(Drawing numbers: 803)

Encoder cover

(Drawing numbers: 818)

MD-76 board

(Drawing numbers: 824, etc.)

Pendulum stopper assembly

(Drawing numbers: 805)

Encoder gear

(Drawing numbers: 754)

Reel table S/T

(Drawing numbers: 753)

Reel base retainer

(Drawing numbers: 829)

Reel base S/T block

(Drawing numbers: 822, 823, 827, 828)

FP-248 flexible board (condensation sensor)

(Drawing numbers: 821)

Page 4

Page 9

Page 10

Page 11

Page 12

Page 13

Page 13 Page 13

Page 11

Page 12

Page 13

Page 14

Page 15 Page 16

Page 16 Page 16

Page 16

Page 13

Page 18 Page 18

Page 19 Page 19

Page 18

Page 16

Page 16 Page 16

Page 15

Page 12

Page 14

Page 8

Page 13

Page 14 Page 14

Page 9 Page 12

Page 11

Page 20

Page 10

Page 8

Page 9

Note: When removing the MD-76 board, all the parts in the shaded

boxes ( ) of the chart need to be removed.

parts list”.

INFORMATION

Find the replacement parts in Section 5, “Repair parts list (exploded

views)” and attach or remove the parts in the follo wing order . When

replacing and re-attaching the parts, adjustments are sometimes

required. Follow the instructions of each item.

Note: Drawing numbers in each box of the chart refer to the numbers

START

— 3 —

1. PARTS REPLACEMENT AND PREPARATION FOR ADJUSTMENT

1-1. ASSEMBLY/DISASSEMBLY OF CASSETTE COMPARTMENT

For details on disassembling the mechanism deck (R mechanism), refer to the Service Manual of the main unit in which the R mechanism is mounted. Before attaching or removing the cassette compartment, check the position of “L cassette”.

Cassette compartment (Remove in the direction of arrow

Positioning pin

Screw

SL shifter

Bent portion



When attaching the cassette compartment, move the reel selector slider in the direction of

arrow

to check the position of “L cassette”.

C

Tightening torque of cassette compartment

0.3432

0.0196N • m (3.5 ± 0.2 kg • cm)

Screw

SL shifter

Bent portion



Bent portion selector slider should be securely hooked on the bent portion of the SL shifter.

Positioning pin

When selecting a cassette position, be careful not to touch the slider drive shaft because it can be easily bent or broken.

Do not touch the slider drive shaft.

Select the desired cassette position by pressing the claw position.

C

of the reel

Reel select slider

1-2. HOW T O LOAD/UNLOAD

[Using the regulated power supply]

Note: Make sure to remove the connector of the cam motor from the board

of the main unit and apply +5V current.

Cam motor

Loading : Apply positive polarity (+) of power supply to the gray wire

and negative polarity (–) of power supply to the white wire.

Unloading: Apply negative polarity (–) of power supply to the gray wire

and positive polarity (+) of power supply to the white wire.

White

Gray

Apply current from the inlets of the connector.

[Manual: No cam motor]

Note: Remove the cam motor from the motor holder while referring to

“Information” on page 3.

Rotate the coupling gear by hand to load or unload.

[Rear side of chassis]

Coupling gear

Unloading

— 4 —

1-3. Service Jigs and Tools

J-1: Cleaning fluid

(9-919-573-01)

J-2: Wiping cloth

(7-741-900-53)

J-3: Super fine applicator

(made by NIPPON APPLICATOR (P752D))

(J-2501-023-A)

J-4: Mirror (Small oval type)

(J-6080-840-A)

J-5: Screwdriver for tape path

(J-6082-026-A)

J-9: Mode Selector

(J-6082-282-B)

J-13:TG2/7 preset plate

(J-6082-459-B)

J-6: Tracking tape (XH2-1)

(NTSC/PAL)

(8-967-997-01)

J-10:FLOIL Grease (SG-941)

(7-622-601-39)

J-14:Relay board for tension

regulator adjustment

(J-6082-461-A)

J-7: Mini DV torque cassette

(J-6082-360-A)

J-11 Cassette refernce plate

(J-6082-330-A)

J-15:Mode selector conversion

board (R)

(J-6082-460-A)

J-8: Adjustment remote

commander (RM-95 upgraded)(Note1)

(J-6082-053-B)

J-12:Reel reference plate

(J-6082-331-A)

J-16:Mode Selector

(Note2)

(J-6082-314-E)

ROM

J-17:

Board for tension regurator adjustment

(J-6082-359-A)

Note1: If the micro processor IC in the adjustment remote commander is

Note 2: ROM for version upgrading to allow use of the mode selector II

not the new micro processor (UPD7503G-C56-12), the pages cannot be switched. In this case, replace with the new micro processor (8-759-148-35).

with the R mechanism.

— 5 —

1-4. About Mode Selector II

• About Mode Selector II

4-1. OUTLINE

This unit is a mechanism drive tool which supplements the maintenance of each mechanism deck. Its functions are described below.

1. Manual test

A mode which drives the motor only while the switch is ON. It enables the operator to control the motor as desired.

2. Step test

A mode which drives the motor until the current condition detected by the sensor changes to another condition. It enables the movements made by the motor in each operation to be controlled while being detected.

3. Auto test

A mode that checks if the mechanism operates normally according to the condition shift table recorded in the unit for each mechanism deck. All the conditions of the decks are checked through a series of operations. An error message is displayed and operations are stopped if incorrect shifts and conditions are detected.

4-2. MECHANISM CONDITION (POSITION)

SHIFTING ORDER LIST

After selecting the mechanism deck, select one of the two test modes other than the auto test, and press the RVS or FF button to specify the mechanism state (position).

Code A

0 0 1 1 1 1 1

1 0 0 0 0 1 1

MD name

1 1 1 0 1 1 0

1 1 1 1 0 0 1

1 2 3 4 5 6 7

R mechanism

ULE DEW LE REW FF STOP FWD / RVS

4-3. MODE SELECTOR II CONNECTION

Connector from the cam motor

R mechanism

Mode selector conversion board (R)

Connector (black) 6P

Alligator clip

Mode selector II

CN2

Connector (white) 6P

Relay boards

Battery of NP-55, 77, etc. (power supply)

— 6 —

2. PERIODIC CHECK

• Carry out the following maintenance and periodic checks not only to fully display the functions and performance of the set, but also for the equipment and tape. After replacing, service the set as follows, regardless of the length of use.

2-1. CLEANING OF ROTARY DRUM ASSEMBLY

1. Press a wiping cloth (J-1) moistened with cleaning fluid (J-2)

against the rotary drum assembly gently, and clean it while rotating the rotary drum assembly slowly with your finger in the counterclockwise direction.

Note: Do not rotate the motor on power or rotate the rotary drum assembly

in the clockwise direction with your finger. The head tip will also be damaged if the wiping cloth is moved perpendicularly against it. Therefore, be sure to follow the above instructions when cleaning the rotary drum assembly.

Cleaning cloth

Rotary drum assembly

2-2. CLEANING OF TAPE PATH SYSTEM

1. Clean the tape path systems (TG1 to TG8 and capstan) and the lower drum using a super fine applicator (J-3) moistened with cleaning fluid.

Note: Make sure that no oil or grease of the link mechanisms sticks to the

super file applicator (J-3).

Note: Do not use a applicator moistened with alcohol to the other guide

cleaning. But clean the pinch roller using alcohol.

TG 3 Pinch roller

TG 2

TG 1

TG 6TG 5TG 4

Capstan

TG 7

TG 8

2-3. PERIODIC CHECKS

Location of Maintenance and Check

Cleaning of tape path surface

Cleaning and degaussing of rotary drum assembly

Capstan (Bearing) Driving System

Performance Confirmation

Note: When overhauling, refer to the checks above and replace parts. Note: Greasing

Gear

Cam motor (worm block)

Abnormal noise

Back tension measurement

Brake system

FWD/RVS torque measurement

Always use the specified grease. If the viscosity differs, various problems may occur. (Use SG-941 for all parts of the R mechanism.)

Check the quantity of grease when installing the parts which is needed to apply the grease. When replacing these parts, make sure to apply the specified amount of grease.

500

– – –

1000

1500

– – –

2000

Hours of Use (H)

2500

– – –

3000

5000

4500

4000

3500

– – –

: Cleaning : Appling grease : Confirmation

– – –

Remarks

Be careful of the oil.

Make sure that no oil gets on the tape path surface.

X-3946-702-1 (M902)

• FOIL (SG-941): Part No. 7-662-601-39

— 7 —

3. PARTS REPLACEMENT

• Precaution

For details on disassembling the cabinets, boards and other parts, refer to “Disassembly” of the Service Manual of each model. For details on replacing parts (disassembly, assembly) of the mechanism deck, refer to “Information” on page 3.

3-1. TAPE GUIDE 1/8 AND GUIDE GUARD

Disassembly/Assembly

When the tape guide 1/8 is replaced or attached, perform each adjustment from Adjustment Start -2 of the flowc hart on page 22.

To attach or remove the tape guide, use the screwdriver for the tape path (J-5). When attaching the TG rollers, check the upward and downward directions and attach them to the chassis shaft.

Face the side of the

TG roller

The guide guard is fixed at each slit of the cassette positioning shaft. To attach the guide guard, only insert it into the right and left holes. To remove it, use a pair of tweezers as shown in the figure below.

deepest hole downward and insert the roller into the shaft.

Guide guard

[TG1 side] (The components are the same as on the TG8 side.)

Be careful not to touch the tape guide ( part).

[TG8 side]

TG upper flange

TG roller

TG sleeve TG ring

Compression coil spring (TG)

Insert a pair of tweezers into the clearance of the chassis to release the lock of the slit.

Cassette positioning shafts

Lock of slit

3-2. TAPE GUIDE 2/7

Disassembly/Assembly

When the tape guide 2/7 is replaced or attached, perform each adjustment from Adjustment Start -3 of the flowc hart on page 22.

To attach or remove the tape guide, use the screwdriver for the tape path (J-5). When attaching the TG rollers, check the upward and downward directions and that the TG roller to be attached to the TG7 side is exclusiv ely for the TG7 side. Then attach the TG rollers to the chassis shaft.

TG2 arm block

Face the side of the deepest hole downward and insert the

TG7 roller

roller into the shaft. The lower flange of the TG7 roller is thicker than those of the TG1, 2, and 8 rollers.

[TG2 side]

TG upper flange

TG roller

TG sleeve

TG ring

Compression coil spring (TG)

[TG7 side]

TG upper flange TG7 roller (Note that the shape is

different from that of the other rollers.)

TG sleeve TG ring

Compression coil spring (TG)

Be careful not to touch the tape guide ( part).

— 8 —

TG7 arm block

3-3. CAPSTAN COVER

Do not fasten this screw.

CN 3

Screw

Fasten the screws in order of 1, 2, 3.

Reel motor

Screw

Tightening torque of reel motor

0.0686 ± 0.0098 N • m (0.7 ± 0.1 kg • cm)

After inserting the flexible board of the reel motor into CN3, attach the reel motor and lock CN3.

3-4. REEL MOTOR

Disassembly/Assembly

Screw

Capstan cover

Tightening torque of capstan cover

0.3432

0.0196 N • m (3.5 ± 0.2 kg • cm) Claw

Pass the two flexible boards

of the drum assembly through the hole.

Disassembly/Assembly

Insert the claw into the long hole of the chassis and fix the cover with the screw.

3-5. FL MOTOR ASSEMBLY, GEAR A, GEAR B AND GEAR CD ASSEMBLY

Disassembly/Assembly

FL motor assembly

Positioning bosses

Gear A

Gear CD assembly

Gear B

Hole

Remove the claws of the FL motor assembly from hole A and hole

and remove the FL motor assembly. Then, remove each gear, etc. T o attach them, after attaching the gears, etc. to the FL motor assembly and hook the positioning bosses of the FL motor block on holes and D then fit the two claws in each hole A and B.

Apply grease

(half size of one grain of rice).

The worm gears are attached inside the FL motor assembly . When attaching the FL motor assembly, apply grease there.

Hole

— 9 —

3-6. GL ARM S ASSEMBLY, GL ARM T ASSEMBLY, COASTER S ASSEMBLY AND

)

COASTER T ASSEMBL Y

Disassembly: Remove the parts in order of 1,2,3,4,5,6,7,8,9,0

For the disassembling and assembling procedures of the GL gear, GL helical torsion spring, etc., refer to page 20.

Stop washer Coater stop washer

Stop washer

Move the TG2/7 arms to the loading position with the regulated power supply or by hand while referring to page 4. Each coaster assembly must be in the unloading position.

GL arm T assembly

Coater stop washer

GL arm S assembly

TG2 arm

Coaster stopper

Unloading position

TG7 arm

Coaster stopper

Do not touch the tape

Coaster T

assembly

Assembly

1 Attach the coaster S/T assembly to the chassis with a new

coaster stopper while being careful not to touch the tape guide. Do the work while holding the drum side of each coaster.

guide ( part).

Coaster S assembly

Coaster stoppers

With consideration for future assembly, check from the rear of the chassis that the phase of the loading arm assy is aligned.

The phase must be aligned with the hole of the chassis.

Loading arm assy

3 Attach the GL arm S assembly while checking the phase of

each part. Fix the stop washers at the correct position, using new stop washers.

Loading arm assy

Hole

Coaster T assembly

Coaster S assembly

2 Attach the GL arm T assembly. Fix the stop washers in the

correct position, using new stop washers.

GL arm T assembly

Stop washer (The stop hole is smaller.)

Coaster stop washer (The stop hole is larger.)

— 10 —

Hole

Stop washer

(The stop hole is smaller. Coaster stop washer (The stop hole is larger.)

Check each phase adjustment while referring to the above figure. Hole A of the GL gear T and hole B of the GL gear S must face each other. Hole D of the loading arm assy must be aligned with the hole of the chassis, and the endmost gear tooth of the loading arm assy must face toward hole C of the GL gear S.

3-7. MIC BASE GUIDE, MIC BASE ASSEMBLY AND MIC BASE SPRING

Pins

Center shaft

Be careful that the 7P flexible board does not interfere with the part.

Disassembly/Assembly

For the disassembling and assembling procedures of the components of the MIC base assembly, refer to page 20.

Claw

FP-104 flexible board (Remove the six solders.)

MIC base guide

Claw

Stop washer (Do not reuse.)

MIC base assembly

Remove the six solders on the FP-104 flexible board from the rear of the chassis. P ass the flexib le board through hole

and pull it out of the front side of the chassis while being careful not to damage it. T o attach the fle xible board, perform the steps of disassembly in reverse order.

Six solders

Temperature of tip of soldering iron : 350 Hold time : one second or shorter

Move the reel selector slider in the direction of arrow and attach the MIC base assembly at the position of “S cassette”. For the assembly of the MIC base spr ing, refer to the figure.

20 °C

MD-76 board

Hole

Note: Do not hold the shaft when

Hole

Positioning pins

When selecting a cassette position, be careful not to touch the slider drive shaft because it can be easily bent or broken.

Do not touch the slider drive shaft.

Reel select slider

Select the desired cassette position by pressing the claw position.

MIC base spring

Reel selector slider

When attaching the MIC base guide, lock the positioning pins, claw C, and claw D in this order. Route the flexible board into the clearance of the MIC base guide.

3-8. DRUM CAP, DRUM ASSEMBLY AND TAPE SUPPORT

Disassembly: Remove them in order of 1,2,3

For the disassembly and assembly procedures of the components of the drum assembly, refer to page 21.

Flexible board (10P)

Assembly: Attach the parts while referring to the

(After assembling, adjust the tape path while referring to page 22 and thereafter.)

selecting the reels.

Insert the side of the shorter spring into the hole of the holder and hook the side of the longer spring.

Clearance

MIC base assembly

Claw

FP-104 flexible board

MIC base guide

Pins

Claw

disassembly procedure and the figure below.

Assembly and disassembly of the drum assembly When pulling the part in the direction of the arrow, the claw is removed from the center shaft, then the right pin and the drum cap are removed as shown in the figure on the right. To attach the drum assembly, perform the disassembly steps in reverse order.

Drum assembly

Drum reference pins

Drum fixing screw assembly (Fasten the screws in order

Drum cap

Flexible board (7P)

Positioning pins

Be careful not to remove this together with the drum cap.

1, 2, 3

Tightening torque of drum assembly

0.02941

(0.3

Tape suppor

0.0049 N • m

0.05 kg • cm)

— 11 —

Assembly and disassembly of the drum assembly

Insertion hole of flexible board (7P)

Insertion hole of flexible board (10P)

Assembly and disassembly of the tape support

The claws are hooked under the sub-chassis.

The claw is hooked on the sub-chassis.

Positioning pin

3-9. PINCH ARM ASSEMBLY

3-10. CAPSTAN MOTOR

Disassembly/Assembly

For the disassembling and assembling procedures of the tape retainer and compression coil spring (tape retainer), refer to page 21.

Roller

Claw

Push roller A into the groove as shown in the figure. Insert roller B into the claw. To remove the pinch arm assembly, pull out the pinch arm upward while pushing the claw.

Roller

Pinch arm assembl

Claw

Roller

Disassembly/Assembly

(After assembling, adjust the tape path from page 22.)

Capstan motor

Be careful not to touch the motor shaft ( part).

Screw

Tightening torque of capstan motor

0.1961

0.0196 N • m (2.0 ± 0.2 kg • cm)

3-11. PENDULUM RETAINER AND PENDULUM ARM ASSEMBLY

Disassembly: Remove them in order of 1,2,3

(To attach them, perform the disassembly steps in reverse order.)

Tightening torque of pendulum retainer

Screw

Pendulum arm assembly

Shaft

0.3432

0.0196 N • m (3.5 ± 0.2 kg • cm)

Pendulum retainer (Remove in the direction of the arrow.)

Shaft

Notes during assembly

When assembling or disassembling the pendulum arm assembly, be careful of the following.

Insert tip arm into hole retainer and insert the pendulum into shaft

Attach the pendulum retainer to shaft B. Be careful of the positions of the pendulum stopper at the rear of the chassis and shaft A of the pendulum arm.

[Rear side of pendulum retainer]

Hole

Shaft

of the pendulum

Shafts

Can be removed.

Shaft

Slide the pendulum arm in the direction of arrow attach it to the chassis.

Pendulum stopper

Positioning boss

— 12 —

Shafts

Cannot be removed.

Shaft

of the pendulum

must be in this position.

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