Sony M2000MECH Service Manual

8mm Video MECHANICAL ADJUSTMENT MANUAL

Ver 1.0 2000. 12

M2000 MECHANISM

Please use this manual with the service manual of the respective models.

MECHANISM DECK

TABLE OF CONTENTS

1. Preparations for Check, Adjustment and Replacement of Mechanism Block

1-1. Service Jigs and Tools ························································ 3 1-2. Mode Selector II Operating Procedure·······························5

2. Periodic Inspection and Maintenance

2-1. Rotary Drum Cleaning ······················································· 9 2-2. Tape Path System Cleaning ················································ 9 2-3. Periodic Inspection List····················································10 2-4. Appling Oil and Grease ···················································· 10

3. Before Replacement, Check or Adjustment

3-1. Phase Adjustment ····························································· 11 3-2. Cassette compartment assembly·······································12

4. Check, Adjustment and Replacement

4-1. Drum Assembly ································································ 14 4-2. HCL Arm Assembly, Loading Motor Assembly ·············· 15 4-3. Drum Base Assembly, Drum Earth ·································· 16 4-4. Guide Rail T2, Capstan Motor ········································· 17 4-5. Blind Plate, Lock Guide ··················································· 18 4-6. Reel Table (T) Assembly, T Soft Assembly ····················· 19 4-7. S Ratchet RE Plate, Cassette Guide S ······························ 20 4-8. R Drive Gear Assembly, LS Cam Plate···························· 21 4-9. LS Cam Plate Position Adjustment ·································· 22 4-10. LS Chassis Block Assembly············································· 23 4-11. TG7 Arm Block Assembly, Pinch Arm Assembly ··········· 24 4-12. Guide Base (T) Block Assembly,

Guide Base (S) Block Assembly ······································ 25

4-13. TG1 Arm, Reel Tab le (S) Assembly, Push Switch (3Key) · 26 4-14. Hall Element (H001, H002 (T/S Reel)),

Photo Transistor (Q001, Q002 (Tape Top/Tape End)), LED (D001 (Tape LED))·················································· 27

4-15. LS Guide Roller, Guide Lock Plate (T),

Pinch Pusher Assembly, Eject Arm···································· 28

4-16. Rotary Switch, Cam Relay Gear,

Change Gear Assembly, Timing Belt ······························· 29

4-17. Guide Gear Assembly, Guide Gear T Assembly,

Cam Relay Gear 1, Guide Lock Plate (S) ························ 30

4-18. LD Gear 4, Cam Gear 1, HC Drive Arm ·························· 31 4-19. M Slide Plate Assembly, LS Arm Assembly,

Cam Gear 2, GL Arm Assembly ······································ 32

5. Adjustment

5-1. Check and Adjustment of TG1 Back-tension Position····· 33 5-2. Check and Adjustment of FWD/RVS Back-tension·········34 5-3. Capstan Motor Azimuth Position Adjustment·················· 35 5-4. Tape Path Adjustment ······················································· 36

6. Exploded Views

6-1. Cassette Compartment Assy, Drum Assy ························· 40 6-2. LS Chassis Block Assembly············································· 41 6-3. Mechanical Chassis Block Assembly-1 ··························· 42 6-4. Mechanical Chassis Block Assembly-2 ··························· 43

7. Printed Wiring Boards and

Schematic Diagrams .............................................. 44

— 2 —

1. Preparations for Check, Adjustment and Replacement of Mechanism Block

Before Replacement, Check or Adjustment

• Refer to the “DISASSEMBLY” section of the SER VICE MANU AL of the respectiv e models for details of removing cabinets and printed wiring boards.

• When checking a mechanism ir making any adjustment to the mechanism or r eplacing mechanical parts, be sure to use the Mode Selector II and select the appropriate status of the mechanical deck such that the mechanical status is suitable for the desired work. Refer to section “1-2. Mode Selector II Operating Procedure” for details on how to enter the mode shown in a rectangle [ ] mode in the sequent sections of this manual.

* Assemble and adjust the parts in the [USE] mode if any mode is not specified in this manual.

1-1. Service Jigs and Tools

Ref. No.

J-1

Cleaning fluid

J-2

Wiping cloth Super-fine applicator

J-3

(made by Nippon Applicator (P752D))

J-4

Head eraser

J-5

Mirror (small oval type)

J-6

Alignment tape

J-7

FWD/RVS take-up torque cassette

J-8

Tape path screwdriver

J-9

Adjustment remote commander (

J-10

MD process table

J-11

Floil grease

J-12

Torque screwdriver

J-13

Mode Selector II

J-14

Mode Selector II conversion board

J-15

Mode Selector II ROM, Ver 1.6

J-16

Thickness gauge

Other required equipment:

• Oscilloscope

• Analog tester (20 kΩ)

Name

NTSC : WR5-1NP PAL : WR5-1CP

RM-95 upgrated

Part code

Y-2031-001-0 7-741-900-53

commercially available

J-6080-840-A 8-967-995-02 8-967-995-07 J-6080-824-A J-6082-026-A

)

J-6082-053-B J-6082-166-A 7-662-001-39 J-9049-330-A J-6082-282-B J-6082-516-A J-6082-314-E

9-911-053-00

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

Jig inscription

Tape path

GD-2038

GD-2086

not the new micro processor (UPD7503G-C56-12), the pages cannot be switched. In this case, replace with the new micro processor (8759-148-35).

Tape path For tracking adjustment

For tape guide adjustment Tape path (for setting the path mode)(Note)

For capstan azimuth adjustment, LS cam plate position adjustment

Used for

— 3 —

J-1 J-2 J-3 J-4 J-5

J-6 J-7 J-8 J-9 J-10

J-11 J-12 J-13 J-14 J-15

J-16

Fig. 1-1.

— 4 —

1-2. Mode Selector II Operating Procedure

1-2-1. Introduction

The Mode Selector II is a mechanism drive tool that assists maintenance work of the various mechanism decks. It has the following functions.

1. Manual Test

In this mode, the motor of the mechanism deck is powered only during the period while the switch is turned on manually. Using the Manual Test, the operator can freely control the motor of the mechanism deck.

2. Step Test

In this mode, the motor of the mechanism deck is kept turned on until the mechanical status is changed from the present mechanical status that is obtained from the sensor information. The Step T est is used to confirm a series of movements of the mechanism deck.

LCD display screen

Selector button

Mode Selector II (Ref. No. J-13)

RVS

SEL

3. Auto Test

The Mode Selector II stores the status transition table in its memory as data indicating the respective modes of the mechanism deck. The status transition table can be used to confirm whether a mechanism deck is operating normally or has abnormality from a series of movements of a mechanism deck. If an abnormal status transition is detected during operation, the “NG” indication appears and the mechanism stops moving.

Mode Selector II (J-6082-282-B) connection diagram

M2000 mechanism

Connector (black) 6-pin (not used in M2000 mechanism)

External battery is connected here as a power supply

Relay board (already connected)

Mode selector ll

Alligator clip

Fig. 1-2.

Alligator clip (not used in M2000 mechanism)

Mode selector ll conversion board (M) (Ref. No. J-14)

Relay board

Battery such as NP-55, NP-77 (power supply)

Connector (white) 6-pin

Fig. 1-3.

— 5 —

1-2-2. Operation

1. Operation Flow Chart

Note: The ROM in the Mode Selector II supports the M2000 mechanism.

From any status

Press RVS and FF for 2 sec. simultaneously

Main power is turned off

MANUAL TEST

SEL

POWER ON

MECHA SELECT

SEL

MODE SELECT

SEL

STEP TEST

RVS, FF

AUT O TEST

2. Mode Selector II Power On

Turn on the main power of the Mode Selector II as follows. Press the SEL button.

RVS FF SEL

3. Mode Selector II Power Off

Turn off the main power of the Mode Selector II as follows. Press the RVS and FF buttons at the same time for 2 seconds or longer while the power is on.

RVS FF SEL

RVS, FFSELRVS FFSELRVS FFSEL

— 6 —

4. Mecha Select

)

When the main power is turned on, the MECHA SELECT display appears on the LCD screen. Select the desired mechanism name using the R VS and FF buttons. Selection is complete when the SEL button is pressed. (Fig. A shows the B mechanism.)

5. Test Type Select

Using the RVS and FF buttons, select a desired test type from the three types of “MANUAL”, “STEP” and “AUTO”. Selection is complete when the SEL button is pressed.

6. Manual Test

In this test, the motor of the mechanism deck is turned on only during the period while the R VS or FF button is pressed manually.

MECHA SELECT B

Pressing the RVS or FF button changes the mechanism name.

Fig. a

TEST TYPE SELECT MANUAL

Pressing the RVS or FF button cycles among MANUAL, STEP, AUTO in this order.

Fig. b

Mechanism name

Present mode

Motor ON/OFF

B MANUAL OFF STATUS

7. Step Test

In this test, the direction of motor movement is determined by the RVS and FF buttons. The motor of the mechanism deck is kept turned on until the mechanical status is changed from the present mechanical status that is obtained from the sensor information.

8. Auto Test

In this test, the mechanism deck is tested as to whether it performs a series of movements correctly in accordance with the operation sequence that is memorized earlier for each type of deck, by checking the output signals from sensors with the stored memory. Turning on the RVS or FF button performs the same operation.

Present status of sensor appears. (example: EJ

Fig. c

Mechanism name

Present mode

Motor ON/OFF

B STEP OFF STATUS

Present status of sensor appears. (example: EJ

Fig. d

Mechanism name

Present mode

Motor ON/OFF

B AUTO OFF STATUS

Present status of sensor appears. (example: EJ

Fig. e

— 7 —

1-2-3. Mechanism Status (Position) Transition Table Using Mode Selector II

After selecting a mechanism deck, select either the MANUAL or STEP test (not AUTO) using the Mode Selector II. The desired mechanism status (position) can be specified by pressing the RVS or FF button. (The selected status appears on STATUS.) EJyUSEyLOADySTOPyTURNyRPyREW

1-2-4. Battery Alarm Indication

When the level of the battery used to supply power to this system decreases, this display appears asynchronously . When this happens, all operations are disabled and the battery must be replaced.

MD name

Code

ABC

100 110 010 011 001 000 101

0 is common and short.

[

1 is common and open.

M2000 Mechanism

USE

LOAD

STOP

TURN

REW

BATT DOWN CHANGE PLEASE

Fig. f

]

— 8 —

2. Periodic Inspection and Maintenance

• Be sure to perform the following maintenance and inspection so

that the machine delivers its full performance and functions, and to protect the machine and tape. Also, perform the following maintenance items after completing the repair work, regardless of the number of hours the machine has been operated by the user.

2-1. Rotary Drum Cleaning

1) Press a wiping cloth (Ref. No. J-2) moistened with cleaning

fluid (Ref. No. J-1) lightly against the rotary drum. Rotate the upper drum with a super-fine applicator slo wly in the counterclockwise direction to clean the rotary drum.

Caution: Never rotate the rotary drum by turning on the main power of

the motor or rotate it in the clockwise direction. Never move the cloth vertically against the head tip, as this will surely damage the video head; the video head must not be cleaned by any other different methods.

TG5

T-reel

TG6

2-2. Tape Path System Cleaning

(Refer to Fig. 2-1.)

1) Set the EJECT state. Clean the tape running path (TG1, 2, 3, 4, 5, 6 and 7, pinch roller and capstan shaft) and lower drum with a super-fine applicator (Ref. No. J-3) moistened with cleaning fluid.

Note 1: Be careful not to allow oil or grease of the various link mechanisms

Note 2: Once the super-fine applicator has been moistened with alcohol,

Note 3: When cleaning the capstan shaft, be carefull not to move the oil

to get on the super-fine applicator (Ref. No. J-3).

do not use it to clean other mechanical parts such as the tape guide. However, the pinch roller is cleaned with alcohol.

seal. If the oil seal is moved, oil will leak.

S-reel

TG4

Pinch roller

TG7

Capstan shaft

TG3

Drum TG1

TG2

Loading moto

Capstan shaft cleaning

Oil seal

Fig. 2-1

— 9 —

2-3. Periodic Inspection List

Maintenance and inspection item

Tape running surface cleaning Rotary drum cleaning and

degaussing Timing belt

Capstan shaft

Drive

mechanism

Loading motor Abnormal sound Back-tension measurement Brake system

check

Performance

FWD/RVS torque measurement

Note: When the machine is overhauled, replace the parts referring to the

above list.

500

—

✩

— — —

1000

✩

✩ ✩ ✩ ✩ ✩

1500

—

✩

— — —

2-4. Appling Oil and Grease

When replacing or assembling the parts, use oil and grease while referring to the following.

On Oil

• Be sure to use the specified grease only. (If oil of different viscosity is used, it can cause various troubles.)

Oil: Part No. 7-661-018-18 (Mitsubishi diamond oil hydro fluid NT-68)

• The oil used for bearings must not contain any dust or other materials, otherwise excessive abrasion and seizure of the bearing could occur.

• A drop of oil means the amount of oil as shown in the illustration in the right, which is the amount that is attracted to the top of a rod of 2 mm diameter.

Operating hours (H)

2000

2500

3000

✩

—

✩

—

✩

—

✩

—

✩

—

✩

—

✩

3500

4000

—

✩

—

✩

—

✩

—

✩

—

✩

—

✩

Metal rod of 1 mm diameter

Fill the oil of about 2 mm depth

4500

—

✩

— — —

5000

Remarks

Be careful not to attach oil Be careful not to attach oil

✩

Never attach oil to the

✩

tape running path during periodic inspection.

✩ ✩ ✩ ✩ ✩

a: Cleaning, ✩: Check

1 mm diamete

Oil

On Grease

• Be sure to use the specified grease only. (If oil of different viscosity is used, it can cause various troubles.)

Floil grease: Part No. 7-662-001-39

• Be sure to use grease into which dust is not mixed.

• The amount of grease is 1 to 1.5 mm diameter in length.

Fig. 2-2

— 10 —

3. Before Replacement, Check or Adjustment

3-1. Phase Adjustment

The phase adjustment of this mechanism block has been adjusted by using the in-phase markings shown in the following figure. When replacing or assembling the parts, check the phase.

Cam gear (2) LS arm assembly

Cam relay gear (2)

Rotary switch

Front side

Cam relay gear (1)

Drum side

GL arm assembly

Guide gear (S) assembly

Hole of mechanism chassis

Guide gear (T) assembly

Fig. 3-1.

HC drive arm

Cam gear (1)

M slide plate assembly

— 11 —

3-2. Cassette compartment assembly

1. Removal procedure

1) Set the [EJ] mode to move up the cassette compartment

assembly 0.

2) Remove the capstan flexible board and flexible wiring board

(FP-300) 1 from the holders X, Y and Z in the directions of the arrows A, B and C.

3) Push the damper assembly 3 in the directions of the arrows

D and E and remove it from the notch of the LS chassis block assembly .

4) Remove the two screws (camera pan2 main M1.4 × 1.6) 4.

5) With the cassette compartment assembly 0 half opened , move

the face plate in the direction of the arrow F and remove it from the grooves 6 and 7 on the LS chassis block assembly .

6) Remove the cassette holder (S) 8 and cassette holder (T) 9

of the cassette compartment assembly 0 from the groove on the LS chassis block assembly.

2. Attachment procedure

1) Set the [USE] mode.

2) Insert the cassette holder (S) 8 of the cassette compartment assembly 0 and cassette holder (T) 9 into the grooves on both sides of the LS chassis block assembly.

3) While moving down the cassette compartment assembly 0, lift up the face plate in the direction of the arrow F and keep this status. Then, insert the face plate in the grooves 6 and 7 on the LS chassis block assembly.

4) Tighten the two screws (camera pan2 main M1.4×1.6) 4. Tightening torque: 0.078 ± 0.01 N•m (0.8 ± 0.1 kgf•cm)

5) Move the damper arm of the damper assembly 3 to the 4 o’clock position and insert the damper assembly into the hole on the LS chassis block assembly and the dowel of the cassette holder (T) 9.

6) Align the damper assembly 3 with the notch of the LS chassis block assembly and rotate the damper assembly 3 in the opposite direction to the arrow E to fix it.

— 12 —

Damper assembly

Cassette holder (T)

FP-300 flexible board,

Capstan flexible board

Remove the flexible board in the direction of the arrow

Capstan flexible board

A B C

FP-300 flexible board

Push

Remove the damper assembly in the direction

of the arrow

Damper assembly

Move the damper arm to the 4 o'clock position.

Insert into these holes and attach.

Damper arm

Be careful not to

deform here.

Cassette holder (T)

While pressing toward the inside

Cassette compartment

assembly

Cassette holder (S)

While pressing toward the inside

(camera pan 2 main M1.4

Be careful not to

deform here.

T wo screws

1.6)

Face plate

Remove the cassette compartment assembly in the direction of the arrow

Fig. 3-2.

— 13 —

When attaching it, coat the hatched portion with grease.

4. Check, Adjustment and Replacement

Note: For removal procedure of the cabinets, printed wiring boards and other parts, refer to “DISASSEMBLY” of the Service Manual of the respective

models.

4-1. Drum Assembly

1. Removal procedure

1) Remove the three screws (drum fitting M1.4 × 2.5) 1 fixing

the drum and remove the drum.

Drum (rear view)

Hole (reference hole B)

Hole (reference hole A)

2. Attachment procedure

1) Align the two reference holes A and B on the rear of the drum with the reference pins A and B of the drum base assembly.

2) Attach the drum with the three screws (drum fitting M1.4 ×

2.5) 1 in the order of A, B and C. Tightening torque: 0.078 ± 0.01 N•m (0.8 ± 0.1 kgf•cm)

3) Clean the drum while referring to 2-1.

4) Adjust the tape path. (Refer to “4. Tape Path Adjustment”.)

Note: Do not touch the outside circumference.

Drum

Reference pin A

Three screws

(drum fitting M1.4

2.5)

Reference pin B

Drum base assembly

Fig. 4-1.

— 14 —

+ 31 hidden pages