SANYO V-95 User Manual

BASIC SERVICE TECHNICAL

piw

INFORMATION

FILENO.

Siiio

Video Cassette Recorder

V95 IMECHANISM

PALSECAM NTSC

Contents

1. MAINTAINING AND CHECKING

THE MECHANISM

1-1. REGULARCHECKSAND

MAINTENANCE ITEMS ...................2

1-2. SERVICETOOLS ..............................3

2. AN OVERVIEW OF THE MECHANISM

2-1. NAMES OF THE MAIN PARTS .......4

2-2. AN OVERVIEW OF THE

MECHANISM MODES .....................6

3. DIS-ASSEMBLING THE MAIN PARTS OF THE MECHANISM

3-1. HOW TO MAKE THE MECHANISM

MOVE ...............................................8

3-2. MECHANISM UNIT .........................9

3-3. CASSETTEDRIVEMECHANISM ....9

3-4. CLEANERROLLER

ASSEMBLY .................................... 11

3-5. CYLINDER(DRUM) ........................12

3-6. FEHEAD AND ACE HEAD.............I4

3-7. CAPSTAN MOTOR ........................15

3-8. LOADING MOTOR ASSEMBLY

AND WORM GEARASSEMBLY ...16

3-9. PINCH ROLLERPRESSURE

MECHANISM .................................16

3-10. L GUIDE LEVERASSEMBLY AND

LOAD LEVERASSEMBLY .............18

3-11. BT LEVERASSEMBLY ..................18

3-12. REELDRIVEMECHANISM ............19

3-13. BRAKES .........................................20

3-14. GUIDES ..........................................22

3-15. WHEEL GEAR2, MAIN CAM AND

MODE SWITCH ..............................23

3-16. CRESCENTSLIDE ..........................24

3-17. S LOAD GEAR,T LOAD GEAR,

S LOAD LEVERASSEMBLY AND

T LOAD LEVERASSEMBLY ..........25

3-18. TAPE SENSORS, REELSENSOR

AND EPSW LEVER .......................26

4. MECHANISM CHECKS AND ADJUSTMENTS

4-1. REELTABLETORQUE CHECK......27

4-2. ADJUSTING THE BT LEVER

ASSEMBLY POSITION AND CHECKINGTHE BACKTENSION

TORQUE IN PLAYMODE ..............27

4-3. TAPE PATH ADJUSTMENT ..........28

VMECHANISM

REFERENCE No. MM531433

1. MAINTAINING AND CHECKING THE MECHANISM 1-1.

REGULAR CHECKS AND MAINTENANCE ITEMS

To obtain full function and maximum performance from the set, and to stop it getting dirty or scratched, we

recommend that you carry out the following maintenance procedures and regular checks. The maintenance checks described in the following section should also be carried out without fail after carrying out any repairs to the set. to a depth of Icm and then taken out.

NOTE: OIL AND GREASE

● Always use the specified brands of oil and grease. if you

use a grease with the wrong viscosity, for example, this can lead to all sorts of problems. Be careful to keep the oil and grease free of dust and foreign bodies.

● A “drop” of oil is the amount of oil remaining on the tip

of a rod with a diameter of 1.5mm after it is dipped in oil

1-1-1. REGULAR CHECKS

Hours of use (H)

Part maintained

Tape guide ACE head, full erase head

Tape path system environment in which the part

Drive Reel belt system

Performance

checks

Cylinder (drum)

Cleaner roller assembly

Pinch roller Reel table

Relay gear, Pulley shaft, Gaar shaft

Loading motor

Back tension o Q o 0 Brake system

FWD, REW, PLAY torque, REV torque

500 1000 1500 2000 2500 3000 3500 4000 4500 5000

o 0 0’ 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 enormously, depending on the

(0) (0) (0) (0) (0) (0) (0) (0) (0) is used.

0 0

o 0 0 0 0 0 0 0 0 0

A A

0 0

o Q

A A A

0 0 0

o 0

OClean

The life of parts varies

~Check

Remarks

Pleyback tension torque:

~ 30 to 50g/cm

FWD: 600g/cm or over REW: 600g/cm or over PLAY (SP mode):

~ 80 to 140g/cm

REV: 120 to 220g/cm

AOi

1-1-2. CLEANING

1. Cylinder (Drum) (See Fig.1-l-1)

Moisten a chamois with methyl alcohol and clean the video

head (including the Hi-Fi audio head) and the tape path

surface of the cylinder. Be sure to wipe horizontally in

relation to the video head. If you wipe vertically, or use

excessive force, you can damage the video head.

2. Tape Path System / Reel Drive System

Clean the pinch roller, the capstan shaft, the tape guides,

the FE head, the ACE head, the reel table, the pulley and the

reel belt with a soft cloth, or chamois, moistened with methyl alcohol.

-2-

Tape path’ surface

.—

Video head

Fig.1-1-1 -

1-2. SERVICE TOOLS

1-2-1. SERVICE TOOLS NOTES ON ALIGNMENT TAPES

Select a PAL or NTSC alignment tape from the list below, repairing. PAL: For models with 625 scanning lines and a field frequency of 50Hz NTSC: For models with 525 scanning lines and a field frequency of 60Hz

according

to the transmission

system Ot the VCH you are

. . . ---

No.

1 Alignment tape 2 Aiianment taDe VHJ-0006 3 I Alignment tape 4 Alignment tape

Eccentric screw driver

Nut box

Torque dial gauge

7 8 Cassette torque meter VHJ-0016

Load lever assembly height adjustment tool

10 Torque gauge screwdriver VHJ-0014

3 mm dia. bit for torque screwdriver VHJ-0045 Used to replace the bit of the torque

I 12 Video head removing tool 13 Oil VHJ-0099

Grease VHJ-0100

Grease VHJ-0101

16 Relay cables

Tool Tool No. Remarks

NTSC

VHJ-0005

VHJ-0007 I — I EP monoscope

VHJ-0003 VHJ-0048

VHJ-OO04

VHJ-0102

VHJ-0041

VHJ-0106 Relay cables of mechanism and CP-1

PAL VHJ-0008 SP colour bar lkHz (normal) VHJ-0009 SP monoscoDe 7kHz (normal)

VHJ-0052

LP monoscope Used to adjust the tape path Used to adjust the height of the lever

load assembly Used tomeasurereel winding torque Used to measure backtensiontorque Used to adjust the height of the load

lever assembly Used to adjust the tightening torque of

screws

gauge screwdriver

Used to remove the upper cylinder

PWB assembly

VHJ-0005,VHJOO06,VHJOO07 VHJ-0003 VHJ-0048 VHJ-0004

No.1,2,3,4

VHJ-0016

VHJ-0041 VHJ-0099 VHJ-0100, VHJ-0101 VHJ-O1O6

No. 12 No, 13

No.5

VHJ-0102 VHJ-0014 VHJ-0045

~ N

!!!

410

No. 6

‘lNo.

l!!!!!

No. 14,15

No. 7

No. 16

Fig.1-2-l

–3-

1-2-2. Using the Relay Cable (VHJ-0106) The mechanism can be repaired without using the relay cable (VHJ-0106). As shown in Fig. 1-2-2, the relay cable

(VHJ-O1O6) is a tool used for relay between the CP-I PWB

assembly and mechanism unit. When connecting it, take note of the pin number of the connector.

NOTE 1: Do not place the mechanism upright as shown in

Fig. 1-2-2 when inserting/ejecting the cassette.

NOTE 2: For NTSC models, be sure to connect the VM-I

PWB assembly and CP-I PWB assembly.

2. AN OVERVIEW OF THE MECHANISM

2-1. NAMES OF THE MAIN PARTS

2-1-1. CASSEITE MECHANISM ASSEMBLY

CP-I PWB assembly

Mechanism unit

Fig. 1-2-2

e lever

pring

Under fl

nion gear

—-

Gear holder

Drive gear

Fig. 2-1-1 —

–4–

2-1-2. TOPVIEW

T in

S incl

Claaner roller aaaembly

Cylinder (Drum)

/ /Sbr;ke I

EP aw lever

T brake asaembly

/ aaaembly

Cleaner lever

.— ,.— ,

S reel gear

Capstan brake assembly

Audio R/P head aasembly

(ACEhead)

\ Tbrake act slide ‘Treel gear

Clutch mounting assembly

. .

embly

Fig. 2-1-2

2-1-3. UNDERSIDE

Harneaa mounting

Pinch cam gear

Mode switch (S8001 )

Brake control lever ~~~~)

Clutch chanrae Ievar

Cylinder earth

Reel belt

Capatan

motor

aaaembly

Al 1

II@ \YY

Main cam >

N AA (

c-c_enta,ide----!b4lLXil73

Whael gear 2 Wheel gear 1

Worm gear assembly

/Brake ac’t lever I i \ \

/ aeaembly

Loading motor assembly

Reel pulley

, Stator

= Rotor

/ T load gear

z S load gear > Crescent mounting , T load lever eeaembly

-- S load lever aasembly

, BT spring lever assembly

— MC-1 PWB aaaambly

S brake act slide

Friction gear aasembly

Fig. 2-1-3

-5-

2-2. AN OVERVIEW OF THE MECHANISM MODES

2-2-1. MECHANISM MODE SWITCHING TABLE

NOTE: The letters and figures enclosed in circles in the mechanism mode column are the codes on the crescent slide.

MODE SWITCH OUTPUT TABLE

HEX DATA

SW DATA 1 x ‘f z

5.OV H H H 5V

1 5.OV H H L Ov

2.5V H L H 5V

2.5V H L L Ov

3 4 3.4V L H H 5V 5 3.4V L H L Ov 6 2.OV L L H 5V 7 2.OV L L L Ov

SW DATA2

APPEARANCE OF MODE SWITCH AND RELATIONSHIP BETWEEN MODE POSITIONS

FF/REvv ~ ~ EJECT

STIL

CZXY

-6-

Fig.z-z-l -

(S): Strength (W): Weakness

Mechanism mode

Principal parts

T brake assembly

S brake assembly

T soft brake assembly

S soft lever BT lever assembly BT spring Pinch roller lever assembly

Clutch mounting assembly PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY PLAY FF

Load lever assembly Capstan brake assembly S and T incline mounting assembly Cleaner roller assembly

2-2-3. HOW TO CHECK THE MECHANISM MODE

POSITION

You can tell which mode the mechanism is currently in by

looking at the codes and marking-lines on the crescent slide ontheunderside of the mechanism chassis. The edae of the crescent mounting is used as the reference line, as

shown in Fig.2-2-2, and the marking-lines and symbols

indicating the mechanism modes are displayed on the crescent slide, which slides against the edge of the crescent mounting. The mechanism mode is read off from the marking-line on the slide crescent which is aligned with the reference-line on the crescent mounting.

Example: In Fig.2-2-2, marking-line 6 is aligned with the

reference-l ineonthecrescent mounting, sothe mechanism

is seen to be in FF/REW mode.

2-2-4. SELF-DIAGNOSIS DISPLAY

Some models are equipped with the SELF-DIAGNOSIS DISPLAYS function.

Useitas ameansoffinding outthesymptoms andcauseof the error before performing repairs. For details, refer to the separate service manual for the respective models.

; 7 ~

OFF OFF ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON OFF OFF OFF OFF

ON ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF ON OFF OFF OFF OFF OFF ON(W) ON(W) ON(S) ON(S) ON(S) ON(W)

UP UP

UNLO UNLO LO LO LO LO LO LO LO LO LO

OFF OFF OFF OFF OFF OFF OFF ON

OFF OFF OFF (ON) (ON) OFF OFF OFF

$ K

~fi g3 o

g’

: J

- “ _

up ;;tWN

LO UNLO

The edge of the crescent mounting is the reference-line.

~ R cc

DOWNI ON

ON ON ON ON ON

OFF ON ON OFF OFF

q p w ~

: $ : :

i= (n

OFF ON ONIOFF OFF ON ONIOFF

OFF OFF OFF

Crescentlmounting

-1 L

)

–7–

Fig.2-2-2

3. DISASSEMBLING THE MAIN PARTS OF THE MECHANISM

POINTS TO NOTE

●

When fitting the parts of the mechanism, refer to the “Assembly Notes”, assembly order.

●

Dis-assembly and assembly should be carried out in EJECT mode unless a movement mode is explicitly specified. EJECT mode is the state in which the cassette tape has been ejected.

●

Clamps are used to prevent parts coming loose. When removing a clamp, be careful not to force it, as this can result in damage.

3-1. HOW TO MAKE THE MECHANISM

MOVE

In order to check a movement such as front loading, front unloading, tape loading, tape unloading, raising/lowering and pressing the pinch roller, you will need to operate the loading motor. There are two methods of operating the loading motor, and these are explained in sections 3-1-1 and 3-1-2. The above movements can also be performed

without operating the loading motor, by following the

method explained in section 3-1-3.

3-1-1. HOW TO OPERATE THE LOADING MOTOR

USING A DC VOLTAGE SUPPLY (See Fig.3-l-1)

1) Remove the power plug from the socket.

2) Remove ~he top cover, front cabinet assembly and bottom cover.

3) Supply a DC voltage in the range 5V between the MOTOR (+) wire and the MOTOR (-) wire on the CP-I PWB assembly. To make the loading motor rotate in

the PLAY or FF/REW direction, the positive terminal should be connected to the MOTOR (+) wire, and the negative terminal to the MOTOR (–) wire. To make it

rotate in the EJECT direction, connect the positive

terminal to the MOTOR (-) wire, and the negative terminal to the MOTOR (+) wire. When rotating the loading motor inthe EJECT direction with a tape slacken, stop the rotation of the loading motor before beginning front unloading. Rotate the capstan motor with your hand, wind the slacked part of the tape, and rotate the loading motor

in the EJECT direction again. NOTE 1: When carrying out front loading, release the lock by pressing down the tray lock lever@ and the lid opener lever @ of the cassette mechanism assembly (shown in

Fig.3-2-2) in the direction of the arrow. NOTE 2: When the loading motor stops rotating, following

the completion of an operation such as tape loading or front unloading, switch off the DC voltage supply.

and proceed in the reverse of dis-

Bottom side

Motor (+) wire

Motor (-) wire

3-1-2. OPERATING THE LOADING MOTOR BY THE

MANUAL METHOD (See Fig.3-l-2)

1) Refer to section 3-2 and install the mechanism unit.

2) Using your finger, turn the loading motor located at the rear of the mechanism unit. For EJECT, turn the loading motor in the direction of the arrow on the loading motor. For PLAY or FF/REW, turn it in the opposite direction. When rotating the loading motor in the EJECT direction with a tape slacken, stop the rotation of the loading motor before beginning front unloading. Rotate the capstan motor with your hand, wind the slacked part of the tape, and rotate the loading motor _ in the EJECT direction again. When carrying out front loading, release the lock by pressing down the tray lock lever @ and the lid opener lever @ of the cassette mechanism assembly (shown in Fig.3-2-2).

The arrow which showtha direction of EJECT

Front side

Fig.3-l-l

Fig.3-l-2

Loading motor

3-1-3. MAKING THE MECHANISM MOVE USING

THE MANUAL METHOD

1) Refer to section 3-2 and remove the mechanism unit.

2) Refer to section 3-15 and remove the gear wheel 2.

3) If you turn the main cam anticlockwise, the mechanism

will switch to a mode such as PLAY or FF/REW. To switch from FF/REW mode to EJECT mode, turn the

main cam clockwise.

–8–

3-2. MECHANISM UNIT

(See Figs. 3-2-1 and 3-2-2)

Remove the top cover, bottom cover and front cabinet

assembly.

—

Unplug the flat cable@l from the VM-1/VP-l PWB assembly on the cylinder (drum), and unplug the ACE head connector@.

Remove the screw @, the two screws@, then remove the VM-1/VP-l PWB assembly@, lifting it upwards. The shape of the VM-1/VP-l PWB assembly and the bracket varies according to the model.

Remove the four screws@ and the two screws@, then lift up the mechanism unit. The tray@ will stop you removing the two screws @ on the front, so release the Iockbypressing down the tray lock lever @ and the lid opener lever @ shown in Fig.3-2-2, then slide off the tray~. section 3-1 and turn the loading motor in the PLAY direction.

@Screw

IFI ““Iat cable

Move the tray by referring to

Bracket

I A ~e@Screw

3-3. CASSEITE DRIVE MECHANISM

3-3-1. CASSEITE MECHANISM ASSEMBLY

(See Figs.3-3-l and 3-3-2)

1) Put the VCR into EJECT mode.

2) Remove the two screws @).

3) Lift up the back of the cassette mechanism assembly @ slightly, and remove the two hooks@ on the front.

ASSEMBLY NOTES:

The cassette mechanism assembly and the mechanism chassis should both be fitted in EJECT mode.

Check that the two hooks @ have snapped into the

mechanism chassis, and make sure that the two holes @in the cassette mechanism assembly are aligned with the two dowels @ on the mechanism chassis.

Make sure that the big tooth on the pinion gear of

the cassette mechanism assembly slots properly into the deepest gap in the start rack gear, as shown in

Fig.3-3-2.

When fitting the two screws@, use the torque gauge screwdriver (VHJ-0014). Give the screws a tightening torque of 5 kg/cm.

~ @Screws

A“

‘k

.“Yi

..-’

.. ,

@Screw

VM-I(VP-1) PWB assembly

Mechanism chassis

f@Hole

Fig.3-3-l

Fig.3-2-l

sure correct erlocking

Lock gear

Fig.3-2-2

–9–

Start rack gear

Fig.3-3-2

3-3-2. CASSEITE DRIVE GEAR (See Fig.3-3-3)

1) Refer to section 3-3-1 and remove the cassette mechanism assembly.

2) Remove clampso and @, then remove the gear holder @.

3) Remove the clampo, then remove the pinion gear@.

4) Remove the clamp@, then remove the lock gear@.

ASSEMBLY NOTES:

1. Put the tray in the EJECT mode position before fitting any parts.

2. Apply grease (VHJ-0100) to the gear mounting shafts, allthe gear teeth, and the cam part of the drive gear@.

3. Ensure that the drive gear, the lock gear and the pinion gear interlock correctly, as shown in Fig.3-3-2.

4. Make sure the clamps@) and @ snap in to the gear holder @.

$)$@

“ I , %J~epiniongear

- Q._R of the teeth) .

(grease the outer rim

3-3-3. DOOR OPENER, UNDER FRAME AND

STAND L (See Fig.3-3-4)

Remove the cassette mechanism assembly, referring —

to section 3-1. Remove the two clamps @ and take out the under _

2) frame @, pulling it towards you. Press down the tray lock lever @ and the lid opener

3) lever@, and loosen the tray@, lifting it away from you. In this state, press the clampo and remove the door opener Iever@.

Remove the two clamps@ and take out the stand L@. Be careful not to exert too much force on the clamps

@, as this could cause damage.

ASSEMBLY NOTES:

1. Apply grease (VHJ-0100) to the grooves @ on the

stand L, the inside of the hole@ in the drive shaft@, and the mounting hole@ in the door opener lever of the stand R.

2. Before fitting the stand L o, be sure to move the

tray@ back as far as the EJECT mode position. Put the two pins @l on the tray@ into the grooves@ on the stand L. Put the drive shaft@ into the hole@.

3. Be sure to fasten the two clamps@ and the clamp@

on the stand R, and to fasten the two clamps @ on the stand L.

@.tand L

@Gear holder

Fig.3-3-3

@Hole

@ !-

Pinsl

@ amps

@Clamp

Fig.3-3-4

–lo–

3-3-4. START RACK GEAR AND FRONT RACK GEAR

‘Mounting

(SeeFigs.3-3-5 and 3-3-61

Remove the mechanism unit, referring to section 3-2.

Remove the cassette mechanism assembly, referring

to section 3-3-1.

Remove the special screw o. When you do this, slide

3) the front rack gear assembly@ towards the front until

it stops, then take it off the shafto. Take care not to damage the shaft@.

Remove the spring @. Remove the clamp@ on the front rack gear@, then

remove the start rack gear @.

ASSEMBLY NOTES:

Apply grease (VHJ-0100) to the front rack gear@ and

all over the inside of the groove on the start rack gearo.

Align the positioning mark@ on the front rack gear@ with the mark @ on the main cam ~.

When installing the cassette mechanism assembly,

refer to section 3-3-1 and align the start rack gear with

the pinion gear.

@Clamp

/ .....’”--’’”-””

,..,

,,,

.,-

...

...”

.....

...

‘%..

....>

/ -,+x, ‘-;’:..

,.., .- ‘-

,,~

,.-,-

~fl&/ ,...”’-” @Spring

...

.... ,., ”

..-”

... .,. -’

.,.

@Start “rack gear

~apply grease to mslde of groove)

@Front rack gear

!ap.ply grease to

y @ Ins;de of groove)

; Shaft

.,..,.

>.,”

/ .-

,.,

@Front rack

““’~.(

‘y ,. -%..

,..-

““””‘“2 ,...””’;;

$@’”

‘ 1

,..

gear assembly

‘Y

@Special screw

3-4. CLEANER ROLLER ASSEMBLY

(See Fig.3-4-1)

1) Remove the clamp@ and take out the cleaner lever@.

When you do this, be careful not to bend the p!astic springs @ and @on the cleaner lever@.

2) Remove the clamp o, and take out the cleaner roller assembly@. Becarefui nottotouch the sponge on the cleaner roller assembly@.

ASSEMBLY NOTES:

1. When mounting the cleaner lever@ on the shaft@, press the clamp@ in the direction shown by the arrow, and snap it into the mounting @ on the audio RIP head assembly.

- 4 Cleaner roller assembly

- @Clamp

- @Cleaner lever

~@ Clamp

@Plastic spring -

*7i?\

_ @Plastic spring

Shaft

Fig.3-4-l

@Positioning mark

@lMain cam

Flg.3-3-5

@Positio~ing mark

Fig.3-3-6

–11–

.,,

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