Sony M2000MECH Service Manual

8mm Video MECHANICAL ADJUSTMENT MANUAL IX

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 ····························································

3-2. Cassette compartment assembly ······································· 12

4.Check, Adjustment and Replacement

4-1. Drum Assembly ····························································

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 Table (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

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

Before Replacement, Check or Adjustment

•Refer to the “DISASSEMBLY” section of the SERVICE MANUAL of the respective models for details of removing cabinets and printed wiring boards.

•When checking a mechanism ir making any adjustment to the mechanism or replacing 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.	Name		Part code	Jig inscription	Used for
J-1	Cleaning fluid		Y-2031-001-0
J-2	Wiping cloth		7-741-900-53
J-3	Super-fine applicator
	(made by Nippon Applicator (P752D))
J-4	Head eraser		commercially available		Tape path
J-5	Mirror (small oval type)		J-6080-840-A	GD-2038	Tape path
J-6	Alignment tape	NTSC : WR5-1NP	8-967-995-02		For tracking adjustment
		PAL : WR5-1CP	8-967-995-07
J-7	FWD/RVS take-up torque cassette		J-6080-824-A	GD-2086
J-8	Tape path screwdriver		J-6082-026-A		For tape guide adjustment
J-9	Adjustment remote commander (RM-95 upgrated)		J-6082-053-B		Tape path (for setting the path mode)(Note)
J-10	MD process table		J-6082-166-A
J-11	Floil grease		7-662-001-39
J-12	Torque screwdriver		J-9049-330-A
J-13	Mode Selector II		J-6082-282-B
J-14	Mode Selector II conversion board		J-6082-516-A
J-15	Mode Selector II ROM, Ver 1.6		J-6082-314-E
J-16	Thickness gauge		9-911-053-00		For capstan azimuth adjustment,
					LS cam plate position adjustment

Other required equipment:

•Oscilloscope

•Analog tester (20 kΩ)

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

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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 Test is used to confirm a series of movements of the mechanism deck.

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

LCD display screen

Selector button

Mode Selector II

(Ref. No. J-13)

RVS

FF

SEL

External battery is connected here as a power supply

Relay board	Alligator clip
(already connected)

Fig. 1-2.

Alligator clip

(not used in M2000 mechanism)

M2000 mechanism

Mode selector ll

Connector (black) 6-pin

(not used in M2000 mechanism)

Relay board

Mode selector ll	Battery such as NP-55, NP-77
conversion board (M)	(power supply)
(Ref. No. J-14)	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.

SEL

POWER ON

MECHA SELECT

RVS, FF

				SEL
From any status
			MODE SELECT			RVS, FF
Press RVS and FF for
2 sec. simultaneously				SEL
Main power is
turned off
MANUAL TEST			STEP TEST			AUTO TEST
SEL	RVS	FF	SEL	RVS	FF	SEL	RVS, FF

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

— 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 RVS 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 RVS or FF button is pressed manually.

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.

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

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

M2000 Mechanism

Code

A	B	C
1	0	0	1	EJ
1	1	0	2	USE
0	1	0	3	LOAD
0	1	1	4	STOP
0	0	1	5	TURN
0	0	0	6	RP
1	0	1	7	REW

[ 0 is common and short. ] 1 is common and open.

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	2-2. Tape Path System Cleaning
	(Refer to Fig. 2-1.)

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 slowly 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.

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

Note 2: Once the super-fine applicator has been moistened with alcohol, do not use it to clean other mechanical parts such as the tape guide. However, the pinch roller is cleaned with alcohol.

Note 3: When cleaning the capstan shaft, be carefull not to move the oil seal. If the oil seal is moved, oil will leak.

TG5	S-reel	TG4
T-reel
TG6
		TG3

Pinch roller

Drum

TG1

TG7

TG2

Capstan shaft

Loading motor

Capstan shaft cleaning

Oil seal

Fig. 2-1

— 9 —

2-3. Periodic Inspection List

	Maintenance and inspection item					Operating hours (H)							Remarks
			500	1000	1500	2000	2500	3000	3500	4000	4500	5000
		Tape running surface cleaning	a	a	a	a	a	a	a	a	a	a	Be careful not to attach oil
		Rotary drum cleaning and	a	a	a	a	a	a	a	a	a	a	Be careful not to attach oil
		degaussing
	Drive mechanism	Timing belt	—		—		—		—		—
													Never attach oil to the
		Capstan shaft	—		—		—		—		—		tape running path during
													periodic inspection.
		Loading motor	—		—		—		—		—
	Performance check	Abnormal sound
		FWD/RVS torque measurement	—		—		—		—		—
		Back-tension measurement	—		—		—		—		—
		Brake system	—		—		—		—		—

a: Cleaning, : Check

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

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.

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.

Metal rod of

1 mm diameter

1 mm diameter

Fill the oil of about 2 mm depth

Oil

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

Cam relay gear (1)

Front side
	GL arm assembly
	M slide plate
Drum side	assembly

Guide gear	Guide gear	Cam gear (1)
(S) assembly	(T) assembly
Hole of mechanism chassis		HC drive arm

Fig. 3-1.

— 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 —

	E
Damper
assembly	Cassette holder (T)
D	Move the damper arm
	to the 4 o'clock position.
Push	Insert into these holes
	and attach.

2Remove the damper assembly in the direction of the arrow E.

3 Damper assembly

1FP-300 flexible board, Capstan flexible board

Remove the flexible board in the direction of the arrow A B C.

FP-300 flexible board

B
C
Z	X
Y
Capstan flexible board	A
* Be careful not to	While pressing
deform here.	toward the inside

9 7

Cassette holder (T)

Damper arm

0Cassette compartment assembly

4 Two screws

(camera pan 2 main M1.4 × 1.6)

	Face plate
6	F

8

Cassette holder (S)

	While pressing	* Be careful not to
		deform here.
	toward the inside

5Remove the cassette compartment assembly

in the direction of the arrow F.

When attaching it, coat the hatched portion with grease.

Fig. 3-2.

— 13 —

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 t he 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.

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 (rear view)
Hole (reference hole B)
	Drum
Hole (reference hole A)
Reference pin A
	Reference pin B
	B
	Drum base assembly
1 Three screws	C
(drum fitting M1.4 ×	2.5)
	A
	Fig. 4-1.

— 14 —