Sony J-MECH Service Manual

DV MECHANICAL ADJUSTMENT MANUAL VI

Ver 1.0 2000. 3

J 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. Cassette Compartment Assy, Damper Assy ······················· 3

2. Periodic Inspection and Maintenance

2-1. Rotary Drum Cleaning ······················································· 4
2-2. Tape Path System Cleaning ················································ 4

(Refer to Fig. 2-1.)······························································4

2-3. Periodic Inspection List······················································5
2-4. Service Jigs and Tools ························································ 6
2-5. Mode Selector II Operating Procedure······························· 8

4. Tape Path Adjustment

4-1. Adjustment Preparation ···················································· 32
4-2. Tracking Adjustment ························································ 33
4-3. TG3 Guide Adjustment ····················································33
4-4. TG7 Guide Adjustment ····················································34
4-5. Check upon Completion of Adjustment ··························· 34

5. Exploded View

5-1. Cassette Compartment Block Assy, Drum Assy Block ···· 36
5-2. LS Chassis Block Assy····················································· 37
5-3. Mechanism Chassis Block Assy······································· 38

3. Check, Adjustment and Replacement of
Mechanical Parts

3-1. Drum················································································· 12
3-2. L. Motor Holder Block Assy (Loading) and

FP-228 Flexible Wiring Board (DEW Sensor)················· 13

3-3. Retainer Plate Assy, LED Retainer···································14
3-4. Brake-T Block Assy, T-reel Table Assy,

Gooseneck Gear Assy·······················································15

3-5. TG1 Assy, Tension Coil Spring (Tension Regulator) ······· 16
3-6. TG1 FWD Position Adjustment ······································· 17
3-7. FWD Back-tension Adjustment········································ 18
3-8. Reel Torque Check ··························································· 18
3-9. TG3 Guide Zenith Adjustment········································· 18
3-10. TG6 Guide Zenith Adjustment········································· 19
3-11. LS Cam Plate Position Adjustment ·································· 19
3-12. LS Chassis Block Assy, LS Guide Retainer····················· 20
3-13. LS Cam Plate, Tension Coil Spring (Brake-S), Brake-S,

Torsion Coil Spring (Brake Arm), Cassette Position Set-S,
Brake-S Driving Arm Assy··············································· 21

3-14. TG7 Block Assy, Torsion Coil Spring

(TG7 Return, Pinch Return), Pinch Arm Assy ················· 22

3-15. Layout Diagram of FP-102 Flexible Wiring Board·········· 23
3-16. TG1 Cam Slider, LS Arm, LS Roller,

Mode Gear Assy, LS Guide Roller··································· 24

3-17. Guide Rail········································································· 25
3-18. Gear Cover B, GL Driving Gear ······································ 26
3-19. Drum Base Block Assy, Coaster-S Block Assy,

Coaster-T Block Assy·······················································27

3-20. DC Motor (Capstan), Conversion Gear, Relay Gear ········ 28
3-21. Gear Cover C, Pinch Driving Arm Assy, Cam Gear B····· 29
3-22. Gear Cover A, FP-100 Flexible Wiring Board ················· 30
3-23. Deceleration Gear, Mode Gear Assy,

FP-100 Flexible Wiring Board, Cam Gear A ··················· 31

6. Printed Wiring Boards and
Schematic Diagrams ·············································· 39

7. Electrical Parts List················································· 41

— 2 —

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

Removal method of
damper assy

1 Claw

1 Claw

Damper assy

Holder arm

Damper shaft

Holder arm

While pressing
toward the inside

Cassette compartment
slide shaft

Cassette compartment
slide shaft

D Groove

Holder arm

LS chassis block assy

LS frame pivots
(two pivots in the right and left)

LS chassis block assy

LS chassis block assy

Cassette compartment
block assy

D Groove

F Notch

While pressing
toward the inside

Cassette compartment
block assy

LS frame

2 Two screws (M1.4 × 2)

Dowel

Slot of damper arm

A

C

B

E

E

* Be careful not to
deform here.

* Be careful not to
deform here.

LS chassis block assy

LS frame

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

• When making any adjustment to a 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 “2-5. Mode Selector II”
for details on how to enter the mode shown in a rectangle [ ] mode in subsequent paragraphs of this manual.

1-1. Cassette Compartment Assy, Damper Assy

1. Removal Procedure

1) Set the [EJ] mode.

2) When the cassette compartment moves up in the direction of
the arrow B, establish the [ULE] mode.

3 Release the two claws 1 and dowel of the damper assy and

remove the damper assy.

4) Remove the shaft of the holder arm from the damper arm.

5) Remove the two screws (M1.4 × 2) 2.

6) Lift up the LS frame in the direction of the arrow C.

7) Lift up the cassette compartment block assy in the direction of
the arrow A. While pushing the holder arm in the direction of
the inside arrow E, remove the cassette compartment block
assy.

2. Attachment procedure

1) Set the [ULE] mode.

2) Attach the holder arm of the cassette compartment block assy
to the cassette compartment slide shaft on both sides of the LS
chassis block assy from inside.

3) Install the LS frame pivot into the groov e D of the LS chassis.
Drop down the LS frame in the direction opposite to C.

4) Hook the LS frame T -side bent portion on the LS chassis notch
F.

5) Attach the LS frame with two screws (M1.4 × 2) 2.
Tightening torque: 0.054 ± 0.01 N•m (0.6 kg•cm).

6) While inserting the damper shaft of the cassette compartment
block assy into slot of the damper arm, engage the two claws
1 with the notch of the LS chassis block assy, and fix the
dowel to the corresponding hole of the LS chassis block assy
respectively.

Note: Check that the two claws 1 and dowel do not come off.

Fig. 1-1

— 3 —

2. Periodic Inspection and Maintenance

t

• 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 slowly in the counter ­clockwise 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.

TG2

TG1

2-2. Tape Path System Cleaning

(Refer to Fig. 2-1.)

1) Set the EJECT state. Clean the tape running path (TG-1, -2, ­3, -4, -5, -6 and -7, pinch roller and capstan shaft) and lower
drum with a super-fine applicator (Ref. 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. 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.

Capstan shaft cleaning

Oil seal

Drum

Capstan shaf

TG6

TG3

TG4

TG7

Pinch roller

TG5

Fig. 2-1

— 4 —

2-3. Periodic Inspection List

r

Maintenance and inspection item

Tape running surface cleaning
Rotary drum cleaning and

degaussing
Capstan bearing
Loading motor

Drive

mechanism

Abnormal sound
Back-tension measurement
Brake system
Brake system
FWD/RVS torque measurement

Performance check

Note 1: When the machine is overhauled, replace the parts referring to the

Note 2: Grease

above list.

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

• The grease used for bearings must not contain any dust or other
matter, otherwise excessive abr asion and seizure of the bearing
could occur.

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

• FLOIL grease (SG-941): Part No. 7-662-001-39

500

a

a

—
—

✩

—
—
—
—

1000

a

a

✩
✩
✩
✩
✩
✩
✩

1500

a

a

—
—

✩

—
—
—
—

Operating hours (H)

2000

2500

3000

a

a

a

a

a

a

✩

—

✩

✩

—

✩

✩

✩

✩

✩

—

✩

✩

—

✩

✩

—

✩

✩

—

✩

3500

a

a

—
—

✩

—
—
—
—

4000

a

a

✩
✩
✩
✩
✩
✩
✩

4500

a

a

—
—

✩

—
—
—
—

2 mm diamete

Fig. 2-2

5000

a

a

Remarks

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

✩
✩
✩
✩
✩
✩
✩

a: Cleaning, ✩: Check

Grease

— 5 —

2-4. 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

Mirror (small oval type)

J-5

Tracking tape (XH2-1) (NTSC, PAL)

J-6

Mini DV torque cassette

J-7

TG1 adjustment jig (FWD position adjustment)

J-8

TG1 FWD adjustment screwdriver

J-9

Dummy drum (for TG36) (J mechanism)

J-10

TG36 gauge

J-11

Torque screwdriver

J-12

Tape path screwdriver
Adjustment remote commander

J-13

(RM-95 upgraded) * Note 1

J-14

Mode Selector II

J-15

Mode Selector II conversion board (J)
Mode Selector II ROM (supporting J mechanism)

J-16

* Note 2

Other required equipment: Oscilloscope

Note 1: If the microprocessor in the adjustment remote commander is not

the new one (UPD7503G-C56-12), the pages cannot be switched.
In this case, replace it with the new microprocessor (8-759-148-

35).

Name

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

J-6080-840-A
8-967-997-01
J-6082-360-A
J-6082-492-A
J-6082-364-A
J-6082-490-A
J-6082-491-A
J-9049-330-A
J-6082-026-A

J-6082-053-B
J-6082-282-B

J-6082-493-A
J-6082-314-E

Part code

—

Jig inscription

GD-2038

Used for

Tape path
Tape path

For TG1 FWD position adjustment

For tape path adjustment

General adjustment (ROM version 1.7)

ROM for Mode Selector II

Note 2: This is the ROM used for upgrading the version of Mode Selector

II to enable it to be used for the J mechanism.

— 6 —

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. 2-3

— 7 —

2-5. Mode Selector II Operating Procedure

2-5-1. 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-14)

RVS

FF

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

J mechanism

External battery is
connected here as
a power supply

Relay board
(already connected)

Mode Selector II

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

Alligator clip

Fig. 2-4

Alligator clip
(not used in J mechanism)

Mode Selector II
conversion board (J)
(Ref. No. J-15)

Relay board

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

Connector (white) 6-pin

Fig. 2-5

— 8 —

2-5-2. Operation

SEL

SEL

SEL

STEP TEST

MANUAL TEST

AUT O TEST

POWER ON

MECHA SELECT

MODE SELECT

From any status

Press RVS and FF for
2 sec. simultaneously

Main power is
turned off

RVS, FF

RVS, FF

RVS, FFSELRVS FFSELRVS FFSEL

1. Operation Flow Chart

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

2. Mode Selector II Power On

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

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 FF SEL

— 9 —

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 J 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.

MECHA SELECT
J

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

J 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

J STEP OFF
STATUS

Present status of sensor appears. (example: EJ

Fig. d

Mechanism name

Present mode

Motor ON/OFF

J AUTO OFF
STATUS

Present status of sensor appears. (example: EJ

Fig. e

— 10 —

2-5-3. 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.)
EJyULEySRyGLySTOPyRP

2-5-4. 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

001
101
100
110
010
011

J Mechanism

1

EJ

2

ULE

3

SR

4

GL

5

STOP

6

RP

BATT DOWN
CHANGE PLEASE

Fig. f

— 11 —

3. Check, Adjustment and Replacement of Mechanical Parts

y

3-1. Drum

1. Removal procedure

1) Loosen the three screws (M1.4 × 2) 1 fixing the drum and

remove the drum.

Drum (rear view)

Slot (reference hole A)

Hole (reference hole B)

2. Attachment procedure

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

2) Install the drum with the three screws (M1.4 × 2) 1 and tighten
the screws in order from A, then B and finally C.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

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

4) Perform the tape path adjustment. (Refer to section 4, “Tape
Path Adjustment”.)

Drum

Reference pin B

Fig.3-1

Reference pin A

Drum base block ass

C

A

B

1 Three screws (M1.4 × 2)

— 12 —

3-2. L. Motor Holder Block Assy (Loading) and

1 Screw (M1.4 × 2.5)

2 Remove

soldering.

3 Remove soldering.

L motor holder block assy

FP-100 flexible wiring board

L motor block assy (loading)

Motor holder

Pin
(The pin must enter
into the polarity
marking hole.)

FP-228 flexible wiring board
(DEW sensor)

Worm shaft

Motor shield

L motor holder
block assy

Deceleration gear

Align the chassis's two square holes
with the round holes.
Note: Be careful not to override.

C Polarity
marking hold

Polarity marking hold

Motor worm

When attaching it,
align the notch with
the dowel.

When attaching it,
align the notch with
the protrusion.

A

A

B

E Claw

D

When attaching it, coat the hatched portion with grease.

FP-228 Flexible Wiring Board (DEW Sensor)

1. Removal procedure

1) Remove soldering 2 from the L motor holder block assy
(loading). Remove the FP-100 flexible wiring board.

2) Remove soldering 3 from the flexible wiring board FP-100.
Remove the FP-228 flexible wiring board (DEW sensor).

Note: Since the FP-228 flexible wiring board (DEW sensor) is attached to

the motor shield by adhesive agent, be careful not to break the flexible
board when removing soldering.

3) Remove the screw (M1.4 × 2.5) 1.

4) Remove the L motor holder block assy.

5) Unlock the claw E and remove the worm shaft.

6) Remove the motor shield.

7) Unlock the two claws A of the motor holder. Remove the L
motor block assy (loading) in the direction of B.

Note: Be careful not to touch the DEW sensor.

2. Attachment procedure

1) Check the direction of the polarity marking C of the L motor
block assy (loading). Attach the L motor block assy (loading)
to the motor holder so that the L motor block assy (loading)
faces the worm shaft side.

2) While aligning the slot and dowel with the motor shield, attach
the motor holder to the motor holder.

3) Apply grease (1/2 drop) between the worm shaft gear and gear
tooth.

4) While the worm gear is engaged with the worm shaft gear,
insert the worm shaft tip into the groove B and fix the worm
shaft under the claw E.

5) While aligning the chassis’s two square holes with the two round
holes, attach the motor holder block assy with the screw (M1.4
× 2.5) 1.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

6) Connect FP-228 (DEW sensor) to the FP-100 flexible wiring
board by soldering. Attach the DEW sensor to the motor shield.

7) Connect the FP-100 flexible wiring board to the motor holder
block assy (loading) by soldering.

Fig. 3-2

— 13 —

3-3. Retainer Plate Assy, LED Retainer

1. Removal procedure

1) While pressing the claw of the LED retainer in the direction of
the arrow A, remove the LED retainer.

2) Remove the LED portion 2 of the FP-102 flexible wiring
board.

3) Remove the two screws (M1.4 × 1.4) 1.

4) In order to remove the retainer plate assy, because it is hooked
with shaft A, shaft B and shaft C, remove the retainer plate
assy while moving it in the direction of the arrow B.

Notch A

Claw on top of TG1 assy

2 FP-102 flexible wiring board

Shaft A

Retainer plate assy

Retainer plate assy

Notch B

Retainer plate assy

Brake-S pivot shaft

LED retainer

2. Attachment procedure

1) Hook shaft A, shaft B and shaft C on notch A, notch B and
notch C of the retainer plate assy in this order.

2) Attach the retainer plate assy with two screws (M1.4 × 1.4) 1.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

3) Route the FP-102 flexible wiring board as shown and install
the LED into the prism as shown.

4) Hook the LED retainer on D, attach it to E and fix them.

Routing the FP-102 flexible wiring board

D

LED

Prism

Flexible board is routed
under the LED retainer.

A

LED retainer

E

Route it so that the
flexible board is placed
above the LED retainer.

2 FP-102 flexible wiring board

Shaft B

Shaft B

1 T wo screws
(M1.4 × 1.4)

TG1 ASSY

Shaft A

B

Fig. 3-3

Notch C

Retainer plate assy

Brake-T pivot shaft

Shaft C

Shaft C

— 14 —

3-4. Brake-T Block Assy, T-reel Table Assy, Gooseneck Gear Assy

1. Removal procedure

1) Remove the brake-T block assy from the brake-T pivot shaft.

2) While pressing the reel claw retainer A of the T-reel table assy
down in the direction of B, remove the reel claw C.

3) Remove the gooseneck assy from the relay gear shaft.

Note: Be careful not to break the reel claw.

When attaching it,
bend the gooseneck gear
assy to the S-reel table
assy side.

T-reel table assy

Relay gear shaft

Gooseneck gear assy

Move the brake-T
counter-clockwise so that

A

C

the T-brake is freed.

B

Brake-T block assy

2. Attachment procedure

1) Insert the gooseneck gear assy into the center hole of the relay
gear shaft. Bend the gooseneck gear assy to the S-reel table
assy side.

2) Attach the brake-T block assy to the brake-T pivot shaft D.

3) Move the brake-T counter-clockwise so that T-brake is freed.
While pressing down the reel claw of the T-reel assy, fix the T­reel to the reel shaft-T by rotating the reel.

4) Check that the brake spring-T works correctly by rotating the
T-reel table assy 30 degrees in the clockwise and counter­clockwise directions.

Note: The retainer on top of the brake spring-T must be hooked on the

brake-T pivot shaft D and moved down to the groove.

Brake-T block assy

Brake spring-T

D Brake-T pivot shaft

Brake-T

Brake gear-T

E Reel shaft-T

D Brake-T pivot shaft

Brake gear-T must be positioned so that
its steps face downward.

Gooseneck gear assy

T-reel table assy

S-reel table assy

Relay gear shaft

Move the brake-T counter-clockwise
so that the T-brake is freed.

Fig. 3-4

— 15 —

3-5. TG1 Assy, Tension Coil Spring (Tension Regulator)

1. Removal procedure

1) Remove the screw (M1.4 × 2.5) 1.

2) Remove the tension coil spring.

3) Remove the TG1 assy tension regulator band.

4) Remove the (FWD) adjustment plate from the S-reel table.
Place it between the T-reel table assy and pinch arm assy.

5) While pressing down the reel claw retainer A of the S-reel
table assy in the direction of B, remove the reel claw C.

Note 1: Be careful not to deform the tension regulator band.
Note 2: Be careful that grease does not attach to the tension regulator band.

S-reel table assy

1 Screw (M1.4 × 2.5)

CA

2. Attachment procedure

1) Coat the root and its surroundings on TG1 piv ot shaft A with
grease (1/4 drop). (Strictly observe the coating position and
specified amount of grease.)

2) Attach the S-reel table assy to the reel shaft-S.

3) Attach the TG1 assy to the TG1 pivot shaft A. Note that the
TG1 drive shaft has entered the groove of the LS block assy at
this moment.

4) Wrap the tension regulator band around the S-reel table assy.
Fix it with the screw (M1.4 × 2.5) 1 while ensuring that
direction of the (FWD) adjustment plate is correct as shown.

5) Hook the tension coil spring 2 on the TG1 assy and on the LS
chassis block assy.

6) Clean the tip of the TG1 pivot shaft with a super -fine applicator
(Ref. J-3) moistened with cleaning fluid.

7) Perform the (FWD) position adjustment referring to section 3-

6.

8) Perform the FWD back-tension adjustment referring to section
3-7.

9) Perform the reel torque check referring to section 3-8.

S-reel table assy

Tension regulator band

Confirm that the direction
of the (FWD) adjustment plate is
correct.

1 Screw (M1.4 × 2.5)

Tension
regulator band

Correct direction
of attachment

LS chassis
block assy

Reel shaft-S

(FWD)
adjustment
plate

B

2Tension coil spring (tension regulator)

2Tension coil spring

(tension regulator)

LS chassis block assy

TG1 Assy

TG1 Assy

A TG1 pivot shaft

Be sure that the arm shaft has
entered the groove.

When attaching it, coat the hatched portion with grease.
FLOIL grease (SG-941): Part No. 7-662-001-39

Fig. 3-5

— 16 —

3-6. TG1 FWD Position Adjustment

l

TG1 FWD adjustment screwdriver (Ref. No. J-8)

TG1 FWD position adjustment jig (Ref. No. J-7)

Torque screwdriver (Ref. No. J-11)

TG1 guide

TG1 FWD position
adjustment jig
(Ref. No. J-7)

When the TG1 assy or S-reel table is replaced, or when a part
constituting these parts is replaced, perform the following
adjustment.

• TG1 FWD Position Adjustment

• FWD Back-tension Adjustment (Refer to section 3-7.)

• Reel table (RVS) torque check (Refer to section 3-8.)

1. Adjustment procedure

1) Establish the [RP] mode.

2) Install the TG1 adjustment jig (Ref. No. J-7) as specified by
the S/T position setting.

Note: Be careful not to damage the flexible wiring board.

3) Attach the torque screwdriver (Ref. No. J-11) and the TG1 FWD
adjustment screwdriv er (Ref. No. J-8) to the adjustment screw
block.

4) While rotating the adjustment screwdriv er a little, press it down
lightly so that it is aligned with the gear of the (FWD)
adjustment plate.

5) Loosen the adjustment screw that is tentatively tightened by
the torque screwdriver . Perform adjustment so that TG1 comes
to the center of the gauge’s groo ve when vie wed from directly
above the TG1 adjustment jig (Ref. No. J-7). Then tighten the
adjustment screw.
Tightening torque: 0.0588 N•m (0.6 kg•cm).

6) Check again that the TG1 position remains in the correct
position, then remove the jig.

When clearance in the L motor holder block assy (loading) side is smal

•
Move the position in the direction of the arrow .

• When clearance in the TG2 guide side is small
Move the position in the direction of the arrow .

L motor holder
block assy (loading)

(FWD) adjustment plate

Adjustment screw

TG1 assy

A

Fig. 3-6

TG1 guide

TG2 guide

TG3 guide

TG1 FWD position
adjustment
jig (Ref. No. J-7)

TG1 FWD adjustment
screwdriver (Ref. No. J-8)

Tension regulator band

S-reel table

assy

Fig. 3-7

— 17 —

3-7. FWD Back-tension Adjustment

3-9. TG3 Guide Zenith Adjustment

1. Adjustment procedure

1) Install the Mini DV torque cassette (Ref. No. J-6).

2) Set the [RP] mode. Confirm that the torque reading of the
supply side is in the range of 0.45 to 0.55 mN•m (4.5 to 5.6
g•cm) including fluctuation. If the torque reading is outside
the specified range, perform the following adjustment.

• If the torque reading value is higher than the specification:

(Reduce the spring tension as follows.)
Shift the hook position of the tension coil spring in the direction
of A.

• If the torque reading value is lower than the specification:

(Increase the spring tension as follows.)
Shift the hook position of the tension coil spring in the direction
of B.

Tension coil spring
(tenstion regulator)

B

TG1 assy

A

LS block assy

1) Remove the drum referring to section 3-1. Install the dummy
drum (Ref. No. J-9).

2) Install the TG36 gauge (Ref. No. J-10) on top of the dummy
drum. Rotate the slant adjustment zenith screw until the TG3
guide and TG36 gauge (Ref. No. J-10) become parallel.

3) Remove all the jigs. Attach the original drum back in its original
position referring to section 3-1.

4) Clean the TG3 and TG4 guides referring to section 2-2.

5) Perform the tape path adjustment. (Refer to section 4, “Tape
Path Adjustment”.)

Roller and TG36 gauge must
be parallel.

TG3 guide

TG36 gauge

TG3 guide

TG4 guide

Slant adjustment
zenith screw

TG36 gauge

Fig. 3-8

3-8. Reel T orque Check

1. Check procedure

[FWD torque]

1) Install the Mini DV torque cassette (Ref. No. J-6).

2) Set the FWD mode. Confirm that the center of the T-reel table
torque reading value is 0.54 to 1.32 (mN•m) (5.5 to 13.5 g•cm)
and the fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0
g•cm).

[RVS torque]

1) Install the Mini DV torque cassette (Ref. No. J-6).

2) Set the R VS mode (by using the EDIT SEARCH (–) button of
the machine). Confirm that the center of the S-reel table torque
reading value is 1.37 to 2.11 (mN•m) (14 to 21.5 g•cm) and the
fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0 g•cm).

Dummy drum

Fig. 3-9

If either of the above specifications is not satisfied, c heck whether
the tension regulator band has any abnormality. If it has no
abnormality, replace the corresponding reel table.

— 18 —

3-10.TG6 Guide Zenith Adjustment

w

Press the LS block assy
with force of 100 to 200 gf
(0.98 to 1.96 N)

Mechanism chassis block assy

LS cam plate

LS cam plate fixing screw

Dowel of LS arm

Press the LS cam plate
with force of 500 to 1000 gf
(4.9 to 9.8 N)

3-11.LS Cam Plate Position Adjustment

1. Adjustment procedure

1) Remove the drum referring to section 3-1. Install the dummy
drum (Ref. No. J-9).

2) Install the TG36 gauge (Ref. No. J-10) on top of the dummy
drum. Adjust the slant of the TG6 guide.

3) Rotate the slant adjustment zenith screw until the TG6 guide
and TG36 gauge (Ref. No. J-10) become parallel.

4) Remove all the jigs. Attach the orig inal drum back in its original
position referring to section 3-1.

5) Clean the TG5 and TG6 guides referring to section 2-2.

6) Perform tape path adjustment. (Refer to section 4, “T ape Pa th
Adjustment”.)

TG6 guide and TG36 gauge
must be parallel.

TG5 guide

TG6 guide

TG36 gauge

TG6 guide

TG36 gauge

1. Adjustment procedure

1) Loosen the LS cam fixing screw (M1.4 × 4) 1 by 180 degrees.

2) Establish the [STOP] mode.

3) While pressing down the center of the LS chassis block assy
with force of 100 to 200 gf (0.98 to 1.96 N), move the LS cam
plate toward the S-reel side and tighten the LS cam plate fixing
screw (M1.4 × 4) 1 with force of 500 to 1000 gf (4.9 to 9.8
N).
Tightening torque: 0.059 to 0.01 N•m (0.6 kg•cm).

Dummy drum

Slant adjustment zenith scre

Fig. 3-11

Fig. 3-10

— 19 —

3-12.LS Chassis Block Assy, LS Guide Retainer

d

1. Removal procedure

1) Remove the FP-100 flexible wiring board from the FPC
connector on the FP-102 flexible wiring board.

2) Remove the screw (M1.4 × 2.5) 2. Remove the FPC holder
from DC motor (capstan).

3) Remove the two screws (M1.4 × 2) 1.

4) Remove the LS retainer in the direction of the arrow A on the
top.

5) Remove the E-type stop ring 1.5 3.

6) Remove the LS chassis block assy in the direction of the arrow

B.

1 Two screws (M1.4 × 2)

A

LS guide retainer

2. Attachment procedure

1) Confirm that the brake-T block assy has been moved in the
counter-clockwise direction C. While pressing the TG7 block
in the direction of the arrow D, insert the LS guide shafts T1
and T2 of the LS chassis block assy into the slots of the
mechanism chassis with slanted angle.

2) While inserting the LS arm dowel into the LS cam plate groove,
insert the LS guide shafts S1 and S2 into the slots of the LS
chassis block assy as shown.

3) Insert the LS guide retainer from the top, align it with the LS
guide shafts S1 and S2 and fix it with the screw (M1.4 × 2) 1.
Tightening torque: 0.059 to 0.01 N•m (0.6 kg•cm).

4) Confirm that the LS guide retainer has play, is not lifted up, is
not installed in opposite direction and has not been deformed.

5) Attach the E-type stop ring 1.5 3 into the LS guide shaft T1.

6) Insert the FPC holder into DC motor (capstan) in the direction
of the arrow E and fix it with the screw (M1.4 × 2.5) 2.

7) Connect the flexible wiring board coming from the FP-100
flexible wiring board into the FPC connector.

FP-102 flexible wiring board

FPC connector

FP-100 flexible wiring board

2 Screw (M1.4 × 2.5)

LS cam plate

Dowel of LS arm

Insert dowel of the LS
arm into the LS cam
plate groove

LS guide shaft S1

LS guide shaft
S2

Dowel of LS arm

TG7 block assy

C

Brake-T block assy

B

D

FP-102 flexible wiring board

FPC holder

E

LS chassis block assy

LS guide shaft T1

LS guide shaft T2

FP-100 flexible wiring boar

DC motor (capstan)

Mechanism chassis block assy

Fig. 3-12

— 20 —

3 E-type stop ring 1.5

3-13.LS Cam Plate, Tension Coil Spring (Brake-S), Brake-S,

LS cam plate

Tension coil spring
(brake-S)

Tension coil spring (brake-S)

Brake-S drive arm assy

Brake-S

Torsion coil spring (brake arm)

Cassette position set-S

2 Screw (M1.4 × 2)

Screw (M1.4 × 2)

1 Screw (M1.4 × 1.4)

1 Screw

(M1.4 × 1.4)

Cassette position set-S

Cassette position set-S

Brake-S

Brake-S drive arm assy

LS cam plate

LS chassis block assy

Torsion coil spring (brake arm)

Insert the brake-S drive arm
assy under groove of the LS
chassis block assy.

Brake-S arm shaft

Brake-S pivot
shaft

Dowel

Dowel of LS chassis
block assy

Insert the cassette position
set-S under the
groove of the LS
chassis block assy.

A

B

B

C

C

Torsion Coil Spring (Brake Arm), Cassette P osition Set-S,
Brake-S Driving Arm Assy

1. Removal procedure

1) Remove the screw (M1.4 × 1.4) 1.

2) Remove the LS cam plate.

3) Remove the tension coil spring (brake-S).

4) Remove the brake-S.

5) Remove the screw (M1.4 × 2) 2.

6) Remove the torsion coil spring (brake arm).

7) Remove the cassette position set-S from groove of the LS block
assy in the direction of the arrow A.

8) Remove the brake-S drive arm assy from groove of the LS
block assy in the direction of the arrow B.

2. Attachment procedure

1) Insert the brake-S drive arm assy under groove of the LS chassis
block assy. Attach the brake-S drive arm assy to the brake-S
arm shaft and to the brake-S pivot shaft.

2) Insert the cassette position set-S under the groove of the LS
chassis block assy. Attach the cassette position set-S to the
brake-S arm shaft.

3) Attach the torsion coil spring (brake arm).

4) Attach the screw (M1.4 × 2) 2 to the brake-S arm shaft.

5) Attach the brake-S to the brake-S arm bearing and to the brake­S pivot shaft.

6) Hook the tension coil spring (brake-S) to the spring stay of the
cassette position set-S and the spring stay of the brake-S.

7) Align the slot of the LS cam plate with the dowel. Move then
in the direction toward the arrow C and attach the scre w (M1.4
× 1.4) 1.

8) Perform the LS cam plate position adjustment referring to
section 3-11.

Fig. 3-13

— 21 —

3-14.TG7 Block Assy, Torsion Coil Spring (TG7 Return, Pinch Return), Pinch Arm Assy

1. Removal procedure

1) Remove the TG7 block assy in the direction of the arrow A.

2) Remove the torsion coil spring (TG7 return) 1.

3) Remove the pinch arm assy in the direction of the arrow B.

4) Remove the torsion coil spring (pinch roller return) 2.

Pinch arm assy

B

2 T orsion coil

spring
(pinch roller return)

2. Attachment procedure

1) Install the torsion coil spring (pinch roller return) 1. (Insert
the 90-degree-bent portion of the torsion spring into the square
hole of the LS chassis block assy.)

2) Attach the pinch arm assy to the pinch arm bearing.

3) Attach the torsion coil spring (TG7 return) 1.

4) While aligning the TG7 block assy with the groove of the LS
chassis block assy, install the TG7 block assy into the TG7
block assy bearing.

TG7 block assy

Insert into groove of the

A

LS chassis block assy

1 Torsion coil spring (TG7 return)

TG7 arm bearing

Square hole

Pinch arm bearing

Groove of LS chassis
block assy

Fig. 3-14

Attachment position of
torsion coil spring

Longer one

Pinch arm assy

TG7 block assy

1 Torsion coil spring
(TG7 return)

2 Torsion coil spring
(pinch roller return)

— 22 —

3-15.Layout Diagram of FP-102 Flexible Wiring Board

y

1. Removal procedure

1) Remove the sensor holder-T from groove of the LS chassis
block assy in the direction of the arrow A.

2) Remove the cassette holder-S by pushing out the hook under
the LS chassis block assy towards the direction of the arrow
B.

FP-102 flexible wiring board

B

LS chassis block assy

Sensor holder-S

FP-102 flexible wiring board

H901 HALL element

H902 HALL element

D901 diode

Fig. 3-15

Sensor holder-T

S903 push lever switch

LS chassis block ass

LS chassis block assy

A

Push out the hook.

— 23 —

3-16.TG1 Cam Slider, LS Arm, LS Roller, Mode Gear Assy, LS Guide Roller

1. Removal procedure

1) Remove the TG1 cam slider.

2) Remove the LS arm. (At this moment, be careful that the LS
roller can come out of cam gear A groove.)

3) Remove the LS roller from the LS arm.

4) Remove the LS guide roller.

LS arm

2. Attachment procedure

1) Coat inside the LS guide roller with grease (1/4 drop of grease)
and insert it into the LS guide shafts S1 and S2.

2) Coat outside the LS guide roller with grease (1/2 drop of grease)
at the two points as shown.

3) While aligning dowel of the TG1 dri ve arm with groo ve of the
mode gear assy, insert the TG1 drive arm into the LS guide
shaft S1.

4) Coat the portion A of the LS arm with grease (1/4 drop of
grease) and insert the LS guide roller.

5) Coat both sides of the groove of the cam gear A with grease (1/
2 drop of grease). Insert the LS guide roller into groove of the
cam gear A and insert the LS arm into the LS guide shaft S2.

6) Insert the TG1 cam slider into the three positions of the LS
guide shaft S1, S2 and slider guide shaft. Insert dowel of the
TG1 cam slider into groove of the cam gear A.

7) Be careful that greasing points are correct, amount of grease is
correct and the LS arm and the TG1 drive arm are not floating.

TG1 cam slider

Overlap it with gear and coat them with grease

Dowel

TG1 drive arm

LS arm

Coat outside the LS guide
shaft S2 with grease

When attaching it, coat the hatched portion with grease.

Coat the area of
0 to 1 mm or less
from the end surface
of top of shaft

Shaft

Coat inside the LS guide
roller with grease

Coat outside the LS guide
shaft S1 with grease

Cam gear A

Insert the LS roller into

LSR J MAAa

groove of cam gear A

ίB

A

Fig. 3-16

Dowel

LS roller

Slider guide shaft

Mode gear assy

— 24 —

3-17.Guide Rail

1. Removal procedure

1) Remove the screw (M1.4 × 2) 1.

2) When removing the guide rail, be careful that claws of the drum
base block assy are fully released. Remove the S-side rail, T­side rail and rail of DC motor side in this order.

1 Screw (M1.4 × 2)

Guide rail

Remove it in the direction
of the arrow while being
careful not to break claw.

2. Attachment procedure

1) Engage the claws of the guide rails with the claws of the drum
base block assy starting engaging the claw from the T-side rail
and S-side rail.

Note: There must no deformation of guide rail, claws must not be

broken, claws must not override, claws must not become white,
not be stained or have no play.

2) Fix the guide rail with the screw (M1.4 × 2) 1.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

Drum base block assy

Rail of DC motor
side (capstan)

T-side rail

S-side rail

Guide rail

Fig. 3-17

Drum base block assy

— 25 —

3-18.Gear Cover B, GL Driving Gear

1. Removal procedure

1) Remove the screw (M1.4 × 2) 1.

2) Remove the gear cover B in the direction of the arrow A.

3) Remove the GL drive gear.

Fig. 2

Cam gear A

When attaching it, coat the hatched portion
with grease.

Coaster-S block assy

Coaster-T block assy

Cam gear B

3 GL drive gear

2. Attachment procedure

1) Coat the cam gear A and the GL drive gear with grease (1/2
drop). (Refer to Fig. 2.)

2) Refer to Fig. 1. While adjusting phase of the GL dri ve gear as
shown, insert the GL drive gear into the GL dri ve shaft. (Insert
it while moving the GL drive gear in the clockwise direction.)

3) Insert the two claws of the gear cover B into the square holes
of mechanism chassis.

4) Fix the GL drive shaft with the scre w (M1.4 × 2) 1. Be sure
that the gear cover B must not have any play.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

A

1 Screw (M1.4 × 2)

Gear cover B

Insert them into the
two grooves.

GL drive gear

Coaster-S block assy

Coaster-T block assy

Cam gear A

Fig. 1

GL drive shaft
Hole of the GL
drive gear

Cam gear A

In-phase markings of the
coaster-T block assy

Hole of mechanism
chassis

Phase adjustment of the GL drive gear

Hole of cam
gear B

Cam gear B

Cam gear B

GL drive shaft

Fig. 3-18

— 26 —

3-19.Drum Base Block Assy, Coaster-S Block Assy, Coaster-T Block Assy

Three screws (M1.4 × 2.5)

Drum base block assy

Coaster-T block assy

Groove of drum base block assy

Coaster-S block assy

GL gear shaft-T

GL gear shaft-S

Coaster-S block assy

Coaster-T block assy

In-phase marking
of coaster-T assy

Spring of coaster
S block assy

Phase adjustment of
coaster-S/T block assy

Phase must be
adjusted exactly
during installation

A

C

B

A

1. Removal procedure

1) Remove three screws (M1.4 × 2.5).

2) Move the coaster-S block assy and coaster-T block assy out
from the drum base groove in the direction of the arrow A.

3) Remove the drum base block assy.

4) Remove the coaster-S block assy from the GL gear shaft-S.

5) Remove the coaster-T block assy from the GL gear shaft-T.

2. Attachment procedure

1) Insert a coaster-S block assy and coaster-T block assy into the
drum base groove.

2) Place a drum base block assy on top of the mechanism chassis
assy. Insert a coaster-T block assy into the GL gear shaft-T.

3) Insert a coaster-S block assy in the oblique direction. While
adjusting phase so that the spring of coaster-S block assy agrees
with the GL gear lever marking of the coaster-T block assy,
insert a coaster-S block assy into the GL gear shaft-S.

Note: • There must be no phase difference.

• Do not remove coaster-S block assy and coaster-T block assy

from the drum base block assy.

4) Determine the exact position of the drum base block assy that
has been tentatively placed, on the mechanism chassis assy.
Tighten the screws at A, B and C in this order.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

Note: Be careful that the position setting boss of drum base block assy

does not override on the mechanism chassis.

Fig. 3-19

— 27 —

3-20.DC Motor (Capstan), Conversion Gear, Relay Gear

1. Removal procedure

1) Remove the three screws (M1.4 × 2) 1.

2) Remove DC motor (capstan). Remove belt from the pulle y of
conversion gear.

3) Remove conversion gear.

4) Remove relay gear.

Belt must be completely
free from twist or stain
when it is installed.

2. Attachment procedure

1) Coat relay gear shaft and conversion gear shaft with grease (1/
8 drop). (Amount of grease must be strictly controlled.)

2) With the larger gear of the relay gear positioned down, attach
the relay gear to the relay gear shaft.

3) With the pulley side of the conversion gear positioned up,
engage the conversion gear teeth with the relay gear teeth, and
install them.

4) Before installing the DC motor (capstan (including belt)), check
that belt is not twisted. Hook a belt on the pulley block of
conversion gear. Align three shafts with corresponding holes.
At this moment, confirm that belt does not override on the shaft.

5) Install DC motor (capstan) with three screws (M1.4 × 2) 1 in
the order of A, B and C.

A, B, C tightening torque
A tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)
B and C tightening torque: 0.038 ± 0.01 N•m (0.4 kg•cm)

Note: Be careful that gears and belts are not damaged or dust is not attached.

Be careful also not to splash grease.

1Three screws (M1.4 × 2)

A

C

B

Relay gear

Conversion gear

Relay gear shaft

Conversion gear shaft

When attaching it, coat the hatched portion with grease.

Fig. 3-20

DC motor (capstan)
(including belt)

— 28 —

3-21.Gear Cover C, Pinch Driving Arm Assy, Cam Gear B

1. Removal procedure

1) Remove the screw (M1.4 × 2) 1.

2) Move the key slot of the gear cover C in the direction of the
arrow A and remove the gear cover C.

3) Remove the pinch drive arm assy.

4) Remove the cam gear B.

Setting the cam gear B position

Hole of the phasing
pin alignment gear

Cam gear B

Phasing pin alignment
position (hole of chassis)

2. Attachment procedure

1) Identify the front side and the rear side of a cam gear B. Align
the cam gear B shaft, the gear phasing hole and the LS chassis
hole. Then attach the cam bear B. coat groove of a cam gear
with grease (1/2 drop).

2) Align the pinch drive arm assy with the pinch driv e pivot shaft.
While aligning dowel with the cam groove of the cam gear B,
insert the pinch drive arm assy.

3) Insert the “one-step bent portion” of gear cover C into notch of
the chassis, insert the cam gear B shaft into the key hole of the
gear cover. C.

4) Insert the gear cover C into the pinch drive pivot shaft and fix
it with the screw (M1.4 × 2) 1. After tightening the screw
(M1.4 × 2) 1, move the gear cover C in or der to conf irm that
there is a little play.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

1 Screw (M1.4 × 2)

Cam gear B shaft

Gear cover C

A

Dowel

Hole of
chassis

Cam gear B shaft

Pinch drive arm assy

Cam gear B

Pinch drive pivot shaft

When attaching it, coat the hatched portion with grease.

Fig. 3-21

Dowel

Gear cover C

Pinch drive arm assy

Identify the front side and
the rear side of a cam gear B.

Front

(correct direction)

Cam gear B shaft

Rear

(incorrect direction)

— 29 —

3-22.Gear Cover A, FP-100 Flexible Wiring Board

1. Removal procedure

1) Remove the screw (M1.4 × 2) 1.

2) Remove the gear cover A in the direction of the arrow A.

3) Remove the screw (M1.4 × 2.5) 2.

4) Remove soldering from the motor terminal and FP-228 flexible
wiring board (DEW sensor) that are used to connect the FP­100 flexible wiring board with the motor holder block assy.

5) Remove the motor holder block assy.

Align the U-groove
with the cam gear
A shaft.

1

Screw (M1.4 × 2)

Gear cover A

2. Attachment procedure

1) Align the motor holder block assy position with the chassis
square hole and round hole. The press the motor holder block
assy with finger.

Note: Coat the worm shaft with grease (1/2 size of a rice gain).

2) Fix the motor holder block assy with the screw (M1.4 × 2.5)

2.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

3) Install the gear cover A as follows: Hook the shaft with the k ey
slot and align the U-groove with the cam gear A shaft. Confirm
at this time that there is a play.

4) Attach the gear cover A to the cam gear A shaft and fix them
with the screw (M1.4 × 2) 1.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

5) Connect the FP-100 flexible wiring board with the motor holder
block assy (motor terminal and FP-228 flexible wiring board
(DEW sensor)) by soldering.

Note: Do not touch the DEW sensor.

Deceleration gear A shaft

Gear cover A

FP-228 flexible wiring board
(DEW sensor)

Motor holder
block assy

Deceleration gear

Align the two points that are square
hole of chassis and round hole.

Note: Be careful not to override.

Phasing check

Gear cover A

Position where hole of the
gear is visible

Cam gear A shaft

A

Soldering
point

2

Screw (M1.4 × 2.5)

Soldering point

FP-100 flexible wiring board

Motor holder block assy

Worm shaft

When attaching it, coat the hatched portion with grease.

Fig. 3-22

— 30 —

3-23.Deceleration Gear, Mode Gear Assy, FP-100 Flexible Wiring Board, Cam Gear A

1 Screw (M1.4 × 2)

Mode gear assy

Mode gear assy

Phase-matching of mode
gear assy and cam gear A

Deceleration gear

Deceleration gear

FP-100 flexible wiring board

Cam gear A

Cam gear A

Identify the front and rear
sides of cam gear A

Phase matching
position of gear
tooth

Phase matching
position of gears

When attaching it, coat the hatched portion with grease.

Coat the entire contacting
area uniformly with grease
uniformly

Cam gear A shaft

Mode gear shaft

Deceleration
gear A shaft

Front side

(correct side)

Rear side

(incorrect side)

1. Removal procedure

1) Remove the deceleration gear.

2) Remove the screw (M1.4 × 2) 1.

3) Remove the cam gear A.

4) Remove the mode gear assy.

5) Remove the FP-100 flexible wiring board.

Note 1: Do not touch the foil pattern area of the FP-100 flexible wiring

board. Any foreign materials must not be adhered.

Note 2: Do not remove the mode gear assy unnecessarily.

2. Attachment procedure

1) Install the FP-100 flexible wiring board to the mechanism
chassis. Confirm that flexible wring board is not stained,
broken, bent or damaged.

2) Coat the entire contact points of the mode pattern area of the
FP-100 flexible wiring board with the contact-point grease
(equivalent to 1.5 drops). (Any foreign materials must not be
mixed in the contact-point grease.)

3) Attach the mode gear assy to the mode gear shaft.

4) Install the deceleration gear as follows: Position the deceleration
gear with its small gear down, and engage the small gear tooth
with the mode gear tooth. Rotate the gear tooth until the phasing
marking of the mode gear assy arrives at the phasing position
of the cam gear A.

5) Identify the front and rear sides of the cam gear A. Confirm
that the marking of the cam gear A and that of the mode gear
assy agree.

6) Attach the screw (M1.4 × 2) 1 of the mode gear assy.
Tightening torque: 0.059 ± 0.01 N•m (0.6 kg•cm)

7) Connect the FP-100 flexible wiring board to the motor holder
block assy by soldering in accordance with section "3-22 [2.
Attachment procedure] step 7.

Note 1: If the FP-100 flexible wiring board is removed, replace it with a

new FP-100 board, and do not use the removed FP-100 flexible
wiring board.

Note 2: Cautions when attaching the FP-100 flexible wiring board:

1 It must not override on the mode gear shaft.
2 It must be aligned with the position setting hole.
3 It must no float, must not have stain or must not be broken.
4 Never touch the foil pattern area with hand.

Fig. 3-23

— 31 —

4. Tape Path Adjustment

t

e

4-1. Adjustment Preparation

1) Clean the tape running surface (tape guides, drum, capstan,
pinch roller) referring to Service Manual.

2) Connect adjustment remote commander (Ref. No. J-13) to the
LANC terminal of the machine. Set the HOLD switch to ON.

3) Connect an oscilloscope to the VC-240 board CN009 via the
CPC-8 jig (J-082-388-A). (in the case of DCR-TRV20).
Scope channel 1: VC-240 board CN009 pin w; (Note)
External trigger: VC-240 board CN009 pin qj

Note: Connect CN009 pin w; and pin ql (GND) with 75 Ω resistor

(1-247-804-11).

4) Play the tracking alignment tape (XH2-1)(Ref. No. J-5) back.

5) Select page: 3, address: 33 and data: 08. (Note)

6) Select page: 3, address: 26 and data: 31. (Note)

7) Confirm that RF waveform on scope is flat in both entrance
side and exit side. (Refer to Fig. 4-2 A).
If RF waveform is not flat in entrance side and exit side, perform
the adjustment of section 4-2. and later. (Refer to Fig. 4-2 B
and C).

8) When the required conditions of step 7) are satisfied and
adjustment/check are complete, perform [Required work upon
completion of adjustment] as described below.

[Required work upon completion of adjustment]

1) Connect adjustment remote commander (Ref. No. J-13) to the
LANC terminal of the machine. Set the HOLD switch to ON.

2) Select page: 3, address: 26 and data: 00. (Note)

3) Select page: 3, address: 33 and data: 00. (Note)

CH1

CH2
(Trigger)

Entrance side

3.3 msec

Exit side

Fig. 4-1

A

Normal

B

Entrance side is defectiv

C

Exit side is defective

Envelope
must be fla

Note: Page and address numbers differ depending on each model. Please

refer to Service Manual of respective models. Those of DCR-TR V20
are described above.

Fig. 4-2

Tape runs while keeping
contact with upper flange

TG2

TG1 TG3 TG4 TG5 TG6 TG7

TG2 guide

TG1 guide

TG3 guide

TG4 guide

FWD

Tape

TG3 and TG4 zenith
adjustment screw

Drum

TG6 guide zenith
adjustment screw

Tape runs while keeping
contact with upper flange

TG6 guide

TG5 guide

Pinch roller

Capstan

Capstan

TG7 guide

S-reel

Fig. 4-3

T-reel

— 32 —

4-2. Tracking Adjustment

e

Adjustment nut (TG3)

TG2 guide

TG1

TG3

TG2

Upper flange

4-3. TG3 Guide Adjustment

1) Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back.

2) Adjust TG3 guide until the envelope of entrance side w aveform
becomes flat.

3) Adjust TG6 guide until the envelope of exit side waveform
becomes flat.

Note: Do not touch or adjust TG3 and TG4 guide zenith adjustment screw .

TG3 guide

TG4 guide

TG5 guide

TG6 guide

TG1 guide

TG2 guide

TG3 and TG4 guide zenith
adjustment screw.
(Do not touch or rotate.)

Fig. 4-4

Entrance side

Exit side

1) Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back.

2) Run the tape in FWD mode. Confirm that tape runs while
keeping contact with upper flange of TG3. If any clearance is
found between top flange and tape, rotate the adjustment nut
in clockwise direction until tape runs while keeping contact
with upper flange of TG3.

Fig. 4-6

When tape runs while keeping contact with upper flange of
TG3, confirm that the tracking waveform does not change. If
the tracking waveform has poor amplitude at the entrance side
as shown, perform tracking adjustment of entrance side.

Fig. 4-5

Normal

Entrance side is
defective

Exit side is defectiv

Fig. 4-7

After entrance side is adjusted, establish the R VS mode. Make
an attempt to rotate the TG3 adjustment nut by 180 degrees in
the counter-clockwise direction in order to confirm that tape
rises upward. Upon confirmation, return the TG3 adjustment
nut to the original position.

Upper flange

TG2

TG1TG3

Fig. 4-8

— 33 —

4-4. TG7 Guide Adjustment

%

x

A

1) Establish the FWD mode. Confirm that tape slack does not
occur in between capstan and TG7 guide. (Specification value:

0.5 mm or less of tape slack) If any tape slack occurs, rotate
the tG7 guide to remove the tape slack.

2) Establish the REV mode. Confirm that RF waveform at exit
side is normal. (Refer to Fig. 4-10.)

3) If the RF waveform at exit side has abnormality , rotate the TG7
nut by 90 degrees in counter-clockwise direction. Then perform
steps 1) and 2) again.

4-5. Check upon Completion of

Adjustment

1. Tracking Check

1) Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back.

2) Confirm that RF waveform has amplitude of about 0.65A (65%)
in the FWD mode taking the waveform amplitude during CUE/
REV mode as A (= 100%). (Refer to Fig. 4-11.)

TG7 guide

Tape slack

TG7 nut

TG6 guide

Capstan motor

Fig. 4-9

Pinch roller

TG5 guide

0.65A

A

A: 100

Fig. 4-11

3) Confirm that difference between the minimum amplitude
(E.min) and the maximum amplitude (E.max) of RF waveform
in the FWD mode is 30% or more taking the waveform
amplitude during CUE (or REV) mode as A (= 100%).

CUE or REV mode

A=100%

FWD mode

E min E ma

Fig. 4-10

E.min: Minimum amplitude
E.max: Maximum amplitude

(E.min – E.min) 30% or (3/10 × A)

Fig. 4-12

4) Confirm that the RF waveform does not have excessive
fluctuation.

C

C

C

A

C

C 1/8 ×

Fig. 4-13

— 34 —

2. CUE/REV Check

Capstan motor

Tape slack

TG7 guide

TG6 guide

TG5 guide

Capstan

FWD

TG1 TG3 TG4 TG5 TG6 TG7

TG2

Tape

1) Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back
and enter the REV mode. Confirm that pitches between peaks
of RF waveform are equally spaced. (Refer to Fig. 4-14.)
If pitches between peaks of RF waveform are not equal, perform
sections "4-2 Tracking Adjustment" and "4-4. TG7 Guide
Adjustment".

2) Enter the CUE mode. Confirm that pitches between peaks of
RF waveform are equally spaced. (Refer to Fig. 4-14.) If
pitches between peaks of RF waveform are not equal, perform
sections "4-2 Tracking Adjustment".

Fig. 4-14

3. Rise-up Check

1) Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back.

2) Establish the FWD playback mode. Confirm that RF waveform
rises up in two seconds or less. Confirm also at this time that
tape slack does not occur at around pinch roller.

3) Run a tape in CUE/REV mode and FF/REW mode. After that
play the tape back and confirm that RF waveform rises up in
two seconds or less.

4) Repeat steps 2) and 3) repeatedly.

Fig. 4-15

4. Tape Run Check

Run a tape in CUE/REV mode. Confirm to see that major tape curl
does not occur at TG2 lower taper, TG3 upper flange, TG6 upper
flange and TG7 upper flange during CUE/REV mode.

Fig. 4-16

— 35 —

5. Exploded View

5-1. Cassette Compartment Block Assy, Drum Assy Block

703

Note: Type name and part code number of the M901 drum

702

differ depending on models. Refer to Service Manual
of the respective models.

704

M901

(Note)

701

701

705

709

706

LS chassis block
assembly
(See page 37)

Mechanism chassis block
assembly
(See page 38)

707

708

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

701 3-703-816-14 SCREW (M1.4)
702 X-3950-369-2 CASSETTE COMPARTMENT ASSY
703 3-059-082-01 SPRING, TENSION
704 3-059-208-01 SPRING (CASSETTE COMPARTMENT T)
705 X-3950-370-2 DAMPER ASSY

706 3-059-101-01 RETAINER, LS GUIDE
707 7-624-102-04 STOP RING 1.5, TYPE -E
708 A-7028-133-A MD(J100) SUB ASSY (Y)
709 3-703-816-41 SCREW (M1.4X2.5), SPECIAL HEAD
M901 — Note — DRUM

701

— 36 —

5-2. LS Chassis Block Assy

)

5-3. Mechanism Chassis Block Assy

757 @

756 @

755 @

758 @

754 @

753 @

759 @

760 @

762 @

761 @

752 @

763 @

FP-102

(Note)

Q901

H901

764 @

not supplied @@@

D901

H902

765 @

not supplied @@@

S903

774

752 @

Q902

772

not supplied @@@

766

not supplied @@@

768

770

773

771

752 @

769

811

M903

808

807

812

804

810

806

809

805

813

814

815

816

820

815

821

817

819

818

815

822

815

825

815

807

824

823

815

M902 (Including belt

826

827

775

751 @

Note: FP-102 is included in the LS sub assy and is attached

to chassis by hot-press.
Because installation of FP-102 requires a very high
accuracy, FP-102 is not supplied as an independent
service parts.

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

751 3-059-173-01 PLATE, LS CAM
752 3-059-100-01 SCREW (M1.4X1.4), SPECIAL HEAD
753 X-3950-364-1 GEAR ASSY, GOOSENECK
754 X-3950-371-1 ARM ASSY, BRAKE (S) DRIVING
755 3-059-166-01 BRAKE (S)

756 3-059-146-01 POSITIONING (S), CASSETTE
757 3-059-167-01 SPRING (BRAKE S), TENSION COIL
758 3-059-169-01 SPRING (BRAKE S ARM), TORSION
759 3-703-816-14 SCREW (M1.4)
760 3-059-090-01 SCREW (M1.4X2.5), SPECIAL HEAD

761 X-3950-358-2 TG1 ASSY
762 3-059-156-01 SPRING (TENSION REGULATOR)
763 X-3950-365-2 TABLE ASSY, S REEL
764 X-3950-366-1 TABLE ASSY, T REEL
765 X-3950-361-1 PLATE ASSY, RETAINER

766 3-059-093-01 RETAINER, LED
768 A-7094-819-A TG7 BLOCK ASSY
769 3-059-165-01 SPRING (TG7 RETURN), TORSION
770 X-3950-359-1 ARM ASSY, PINCH
771 3-059-161-01 SPRING (PINCH RETURN), TORSION

772 3-059-170-01 BRAKE (T)
773 3-059-171-01 GEAR (T), BRAKE
774 3-059-172-01 SPRING (T), BRAKE
775 A-7094-816-A LS BLOCK ASSY
D901 8-719-078-71 DIODE LA57A,SO (TAPE LED)

H901 8-719-067-74 ELEMENT, HOLE HW-105A-CDE-T (S REEL)
H902 8-719-067-74 ELEMENT, HOLE HW-105A-CDE-T (T REEL)
Q901 8-729-028-71 TRANSISTOR PN 166, SO (TAPE END)
Q902 8-729-028-71 TRANSISTOR PN 166, SO (TAPE TOP)
S903 1-771-326-41 SWITCH, PUSH LEVER (1 KEY) (CC DOWN)

801

803

828

802

not supplied @@@

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks

801 3-059-211-01 GEAR, CONVERSION
802 3-059-220-01 GEAR, RELAY
803 3-059-187-01 SHAFT, WORM
804 3-059-186-03 HOLDER, MOTOR
805 3-060-002-01 ROLLER, LS GUIDE

806 3-059-189-01 GEAR (A), CAM
807 3-703-816-41 SCREW (M1.4X2.5), SPECIAL HEAD
808 3-059-225-01 SHIELD, MOTOR
809 3-059-191-01 ROLLER, LS
810 3-059-190-01 ARM, LS

811 1-677-049-11 PWB, FP-228 FLEXIBLE
812 1-677-084-11 PWB, FP-100 FLEXIBLE
813 3-059-149-01 SLIDER, TG1 CAM
814 3-059-148-01 ARM, TG1 DRIVING
815 3-703-816-14 SCREW (M1.4)

816 3-059-117-01 COVER (A), GEAR
817 X-3950-367-1 GEAR ASSY, MODE
818 3-059-139-01 GEAR, GL DRIVING
819 3-059-188-01 GEAR, DECELERATION
820 A-7094-818-A COASTER (S) BLOCK ASSY

821 A-7094-817-A COASTER (T) BLOCK ASSY
822 3-059-126-01 RAIL, GUIDE
823 3-962-914-01 SCREW (M1.4X2)
824 A-7094-822-A DRUM BASE BLOCK ASSY
825 3-059-118-01 COVER (B), GEAR

826 3-059-083-01 COVER (C), GEAR
827 X-3950-368-1 ARM ASSY, PINCH DRIVING
828 3-059-192-01 GEAR (B), CAM
M902 8-835-685-01 MOTOR, DC SCD18A/C-NP (INCLUDING BELT)
M903 A-7094-823-A MOTOR BLOCK ASSY, L

— 37 — — 38 —

6. Printed Wiring Boards and Schematic Diagrams

FP-102 FLEXIBLE BOARD

127

Q902

TAPE TOP

SENSOR

Q901

TAPE END

SENSOR

H901

S REEL

SENSOR

H902

T REEL

SENSOR

CN901

S901

(REC PROOF)

S903

(CC DOWN)

M903

LOADING

MOTOR

10

1-677-085-

D901

(TAPE LED)

1

11

101

FP-100 FLEXIBLE BOARD

M

DEW

SENSOR

11

1-677-049-

FP-228
FLEXIBLE BOARD

— 39 — — 40 —

11

1-677-084-

S902

MODE SWITCH

1

4

73265

123456789

DEW-

A

B

C

FP-228

FLEXIBLE

DEW
SENSOR

M903
LOADING
MOTOR

S902
MODE
SWITCH

M

LM_LOAD

1LM_LOAD

2LM_LOAD

3LM_UNLOAD

4LM_UNLOAD

5DEW+

6DEW-

7MODE A

8MODE B

9MODE C

10SW_COM

LM_LOAD

LM_UNLOAD

DEW+

LM_UNLOAD

S903

(CC DOWN)

FP-100

FLEXIBLE

D

FP-102

FLEXIBLE

16

1011121314151617181920212223242526

CHIME_SCK

CHIME_SDA

XMODE_SW_A

XMODE_SW_B

D901

(TAPE LED)

CN901

4P

XMODE_SW_C

SW_COM/SW_GND

S901

(REC PROOF)

TAPE_LED_A

TAPE_LED_K

XCCDOWN_SW

MIC/REC_SW_GND

XREC_PROOF

CHIME_VDD

Vcc -

+G

H902
T REEL
SENSOR

H901
S REEL
SENSOR

TREEL+

HALL_VCC

-Vcc

G+

TREEL-

SREEL-

HALL_GND

SREEL+

TAPE_END

TOP/END_GND

Q902
TAPE TOP
SENSOR

Q901
TAPE END
SENSOR

27

27P

TAPE_TOP

7. Electrical Parts List FP-102

Ref. No. Part No. Description Remarks

FP-102 FLEXIBLE (Not supplied)

**************************

< DIODE >

D901 8-719-078-71 DIODE LN57A.SO

< HOLE ELEMENT >

H901 8-719-067-74 DIODE HW-105A-CDE-T
H902 8-719-067-74 DIODE HW-105A-CDE-T

< TRANSISTOR >

Q901 8-729-028-71 TRANSISTOR PN166.SO
Q902 8-729-028-71 TRANSISTOR PN166.SO

< SWITCH >

S903 1-771-326-41 SWITCH, PUSH (1KEY) (CC DOWN)

***********************************************************

(Ref.No.;6000Series)

— 41 —

DV MECHANICAL ADJUSTMENT MANUAL VI

9-929-807-11

Sony Corporation

Personal VIDEO Products Company

— 42 —

Printed in Japan © 2000.3

2000C1671-1

Published by Safety & Service Engineering Dept.