SANYO Time Lapse VCR User Manual
BASIC SERVICE TECHNICAL
INFORMATION
FILE NO.
Time Lapse/Real Time
Video Cassette Recorder
Contents
1. MAINTAINING AND CHECKING
THE MECHANISM
1-1. REGULAR CHECKS AND
MAINTENANCE ITEMS .................. 2
1-2. SERVICE TOOLS AND CLEANING
.......................................................... 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. DISASSEMBLING THE MAIN
PARTS OF THE MECHANISM
3-1. HOW TO MAKE THE MECHANISM
MOVE ............................................... 8
3-2. MECHANISM UNIT ......................... 9
3-3. CASSETTE DRIVE MECHANISM ... 9
3-4. CLEANER ROLLER
ASSEMBLY .................................... 11
3-5. CYLINDER (DRUM) ....................... 12
3-6. FE HEAD AND ACE HEAD ............ 14
3-7. CAPSTAN MOTOR ....................... 15
3-8. LOADING MOTOR ASSEMBLY
3-9. PINCH ROLLER PRESSURE
3-10. L GUIDE ACT LEVER ASSEMBLY ,
3-11. BT LEVER ASSEMBLY ................. 18
3-12. REEL DRIVE MECHANISM ...........19
3-13. BRAKES ......................................... 20
3-14. GUIDES .......................................... 22
3-15. WHEEL GEAR 2, MAIN CAM AND
3-16. CRESCENT SLIDE ......................... 24
3-17. S LOAD GEAR, T LOAD GEAR,
3-18. TAPE SENSORS, REEL SENSOR
AND WORM GEAR ASSEMBLY .. 16
MECHANISM ................................ 16
LOAD LEVER ASSEMBLY AND
STOPPER LEVER ASSEMBLY ..... 18
OPT PINCH RELAY GEAR ............ 23
S LOAD LEVER ASSEMBLY AND
T LOAD LEVER ASSEMBLY ......... 25
AND EP SW LEVER ...................... 26
VP-R/VP-N
MECHANISM
4. MECHANISM CHECKS AND
ADJUSTMENTS
4-1. REEL TABLE TORQUE CHECK .... 27
4-2. ADJUSTING THE BT LEVER
ASSEMBLY POSITION AND
CHECKING THE BACK TENSION
TORQUE IN PLAY MODE ............. 27
4-3. TAPE PATH ADJUSTMENT ......... 28
VP-R/N MECHANISM
REFERENCE No.MM5310380
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.
1-1-1. REGULAR CHECKS
Hours of use (H)
Part maintained
Band brake assembly
BT lever assembly
Full erase head
Cleaner roller assembly
Guide roller assembly
S incline mounting assembly
Tape path
system
Reel drive
system
Brake
system
Loading
drive
system
Performance
checks
This periodic maintenance check table changes considerably according to the using conditions and environment.
This is an annual periodic maintenance check table. Repeat this maintenance table every year.
As life may be shortened if foreign particles and dusts remain accumulated on the tape guides and rotating and
contacting portions, clean if dirty.
Dusts and other foreign particles on the tape guides may also shorten the tape life and lower picture quality, therefore
clean thoroughly.
T incline mounting assembly
ACE head
Pinch roller lever assembly
Pinch lift mounting
Pinch lift cam
Pinch cam gear
Cylinder chip earth
Cylinder complete
Upper cylinder assembly
Supply reel assembly
Take up reel assembly
S reel gear
T reel gear
Reel pulley
Special washer 2.4 x 6 x 0.25
Clutch mounting complete
Reel belt
Capstan motor
Friction gear assembly
S brake assembly
T brake assembly
Capstan brake assembly
T soft brake assembly
Loading motor assembly
Damper
Worm gear complete
Main cam
Special washer 3.6 x 0.5
Wheel gear 1
Wheel gear 2
Opt pinch relay gear
Crescent slide
S load gear
Front rack gear
Start rack gear
Pinion gear
Back tension torque
FF, REW torque
PLAY torque
REV torque
2000
4000
6000
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
to a depth of 1cm and then taken out.
Check, ReplaceCleaning
8000
PB back tension torque: 25~50g/cm
FF, REW: more than 600g•cm
PLAY: 55~110g•cm
REVIEW: 100~210g•cm
Check
Oil
Remarks
–2–
1-2. SERVICE TOOLS AND CLEANING
1-2-1. SERVICE TOOLS
NOTES ON ALIGNMENT TAPES
Select a PAL or NTSC alignment tape from the list below, according to the transmission system of the VCR you are
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
No. Tool Tool No. Remarks
NTSC PAL
1 Alignment tape VHJ-0005 VHJ-0008 SP colour bar 1kHz (normal)
2 Alignment tape VHJ-0006 VHJ-0009 SP monoscope 7kHz or 6kHz (normal)
3 Alignment tape VHJ-0007 ——— EP monoscope No Audio signal
4 Alignment tape ——— VHJ-0052 LP monoscope 3kHz (normal)
5 Alignment tape VSJ-1001 ——— EP Sync signal 3kHz (normal)
6 Eccentric screw driver VHJ-0003 Used to adjust the tape path
7 Nut box VHJ-0048 Used to adjust the height of the lever
load assembly
8 Torque dial gauge VHJ-0004 Used to measure reel winding torque
9 Cassette torque meter VHJ-0016 Used to measure back tension torque
10 Load lever assembly height adjustment tool VHJ-0111 Used to adjust the height of the load
lever assembly
11 Torque gauge screwdriver VHJ-0014 Used to adjust the tightening torque
of screws
12 3 mm dia. bit for torque screwdriver VHJ-0045 Used to replace the bit of the torque
gauge screwdriver
13 Oil VHJ-0099
14 Grease VHJ-0100
15 Grease VHJ-0101
16 Grease VHJ-0114
17 Upper drum fitting tool kit (includes VHJ-0113) VHJ-0112 Used to reassemble the upper cylinder
18 Hexagonal wrench VHJ-0113 Spare hexagonal wrench for upper
drum fitting tool kit
VHJ-0005,VHJ-0006,VHJ-0007,
VHJ-0008,VHJ-0009,VHJ-0052,
VSJ-1001
No. 1, 2, 3, 4, 5
VHJ-0016
No.9
VHJ-0099
No. 13
VHJ-0003
No. 6
VHJ-0111
No. 10
VHJ-0100, VHJ-0101, VHJ-0114
No. 14, 15, 16
VHJ-0048
VHJ-0014
VHJ-0112
and
No. 7
No. 11
VHJ-0113
No. 17, 18
VHJ-0004
No. 8
VHJ-0045
No. 12
Fig.1-2-1
–3–
1-2-2. CLEANING
1. Cylinder (Drum) (See Fig.1-2-2)
Moisten a chamois with methyl alcohol and clean the
video 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.
Cylinder (Drum)
NOTE: If the dirt on the tape guide cannot be cleaned off,
replace the tape guide.
2. AN OVERVIEW OF THE MECHANISM
2-1. NAMES OF THE MAIN PARTS
2-1-1. CASSETTE MECHANISM ASSEMBLY
Special washer
Washer
Stand L
Tray lock
spring
Tape path surface Video head
Fig.1-2-2
Release lever
Lid opener spring
Under frame
Door opener
lever
–4–
Drive gear
Pinion gear
Lock gear
Gear holder
Fig. 2-1-1
2-1-2. TOPVIEW
Cylinder mounting
Guide roller assembly
Full erase head
T incline mounting assembly
S incline mounting assembly
Guide roller assembly
Tape end sensor
BT lever assembly
Tape sensor LED
Band brake assembly
Supply reel assembly
S soft lever
Stator
BT spring
EP switch
Cleaner roller assembly
Cylinder (Drum)
Rotor
Capstan brake assembly
Cleaner lever
Audio R/P head
assembly
(ACE head)
Stopper lever
assembly
Dew sensor
Pinch roller lever assembly
Capstan motor
Pinch lift cam
Pinch lift mounting
Front rack gear
Opener mounting
Pinch cam gear
Start rack gear
Load lever assembly
Tape top sensor
L guide act lever assembly
T brake assembly
T soft brake assembly
Take up reel assembly
2-1-3. UNDERSIDE
Capstan mounting
Reel belt
Pinch cam gear
OPT pinch relay gear
Brake control lever
Main cam
Clutch change lever
Crescent slide
EP sw lever
assembly
S reel gear
Capstan motor
T reel gearT brake act slideS brake
Clutch mounting assembly
Fig. 2-1-2
T load gear
S load gear
Crescent mounting
T load lever assembly
S load lever assembly
BT spring lever assembly
MC-1 PWB assembly
S brake act slide
Wheel gear 1Wheel gear 2
assembly
Loading motor assemblyWorm gear assembly
Reel pulleyBrake act lever
Friction gear assembly
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.
HEX
DATA
6
4
0
6
2
0
7
0
1
0
1
0
2
0
2
0
Mechanism mode The principal mode-switching states of the mechanism
EJECT
Distinguished by whether the
EP switch is ON or OFF.
Horizontal shift section.
Vertical shift section.
IN REW
INITIAL
Cleaner roller assembly: ON
S/T mounting incline assembly
pressure begins.
S/T mounting incline assembly
pressure ends.
REVIEW
R. STILL/R. SLOW
IDLER POS.
(Pinch roller OFF)
IN REW
(SHORT REW)
When loading is carried out starting
at the CASSETTE IN position
CASSETTE OUT
(EJECT)
INITIAL
REVIEW
R. STILL/R. SLOW
3
STILL/SLOW/REC (INTERVAL)
0
5
PLAY/STOP/REC
REC PAUSE
0
6
4
BRAKE pos.
POWER OFF
STAND BY
STAND BY/POWER OFF
0
6
FF/REW
MODE SWITCH OUTPUT TABLE
HEX DATA SW DATA 2 SW DATA 1 SW DATA 0
0H H H
1H H L
2H L H
2H L H
3H L L
4L H H
5L H L
6L L H
7L L L
STILL/SLOW/REC
STOP PLAY CUEREC
REW FF
H: 5V
L: 0V
Low active
Fig.2-2-1
–6–
2-2-2. MOVEMENT CHECK LIST FOR THE MAIN PARTS OF THE MECHANISM
Mechanism mode
REV
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
Load lever assembly
Capstan brake assembly
S and T incline mounting assembly
Cleaner roller assembly
EJECT
OFF
OFF
OFF
ON
OFF
OFF
UP
PLAY
UNLO
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
UP
PLAY
UNLO
OFF
OFF
IN REW
ON
OFF
OFF
ON
OFF
OFF
UP
PLAY
UNLO
OFF
OFF
INITIAL
ON
OFF
ON
ON
OFF
OFF
UP/
DOWN
PLAY
LO
OFF
LO
(ON)
(LOADING)
(UNLOADING)
ON
OFF
ON
ON
OFF
OFF
DOWN/
UP
PLAY
LO
OFF
UNLO
(ON)
OFF
OFF
ON
OFF
ON
ON(W)
ON
PLAY
LO
OFF
OFF
IDLER
OFF
OFF
ON
OFF
ON
ON(W)
OFF
PLAY
LO
OFF
OFF
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 on the underside of the mechanism chassis. The
edge 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-line on the crescent mounting, so the mechanism is seen to be in FF/REW mode.
crescent mounting
is the reference-line.
2: R.STILL/R.SLOW
Crescent slide
(S): Strength (W): Weakness
BRAKE
STILL/SLOW
OFF
OFF
OFF
OFF
ON
ON(S)
ON(S)
ON
PLAY
PLAY
LO
ON
OFF
PLAY/STOP
OFF
OFF
OFF
OFF
ON
ON
LO
OFF
OFF
(POWER OFF)
ON
ON/OFF
ON/OFF
ON
OFF
OFF
ON
ON(S)
ON(W)
OFF
PLAY
LO
OFF
OFF
OFF
OFF
ON
OFF
FF
LO
OFF
OFF
Crescent mountingThe edge of the
6: FF/REW
6
4
5
3
2
2
1
4: BRAKE (POWER OFF)
5: PLAY/STOP/
REC
3: STILL/SLOW/
REC (INTERVAL)
2: IDLER
1: REVIEW
R.STILL/
FF/REW
OFF
OFF
ON
OFF
ON
OFF
ON
PLAY
LO
ON
OFF
R.SLOW
2-2-4. SELF-DIAGNOSIS DISPLAY
Some models are equipped with the SELF-DIAGNOSIS
DISPLAYS function.
Use it as a means of finding out the symptoms and cause
of the error before performing repairs.
For details, refer to the separate service manual for the
respective models.
–7–
7
E
7: INITIAL
E: EJECT
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", and proceed in the reverse of disassembly 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 31-1. The above movements can also be performed without operating the loading motor, by following the method
explained in section 3-1-2.
3-1-2.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 wheel gear 2.
3) If you turn the main cam counterclockwise, 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.
Main cam
Wheel gear 2
CW
CCW
3-1-1.OPERATING THE LOADING MOTOR BY THE
MANUAL METHOD (See Fig.3-1-1)
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
opener lever
(shown in Fig.3-2-2).
The arrow which show the direction of EJECT
of the cassette mechanism assembly
and the lid
Fig.3-1-2
Loading motor
Fig.3-1-1
–8–
3-2. MECHANISM UNIT
(See Figs. 3-2-1 and 3-2-2)
1) Remove the top cover, bottom cover and front cabinet assembly.
2) Unplug the flat cable
assembly on the cylinder (drum), and unplug the
ACE/FE head connectors
3) Unplug the flat cable from the stator.
4) Unplug the dew sensor connector
5) Remove the four screws
unit. The tray
on the front, so release the lock by pressing down
the tray lock lever
in Fig.3-2-2, then slide off the tray
referring to section 3-1 and turn the loading motor in
the PLAY direction.
Screw
will stop you removing the two screws
and the lid opener lever shown
Screw
from the CP-1 PWB
.
.
, then lift up the mechanism
. Move the tray by
Flat cable
Screw
Dew sensor
connector
Screw
3-3. CASSETTE DRIVE MECHANISM
3-3-1.CASSETTE MECHANISM ASSEMBLY
(See Figs.3-3-1 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:
1. The cassette mechanism assembly and the mecha-
nism chassis should both be fitted in EJECT mode.
2. Check that the two hooks
mechanism chassis, and make sure that the two holes
in the cassette mechanism assembly are aligned
with the two dowels
3. 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.
4. When fitting the two screws
screwdriver (VHJ-0014). Give the screws a tightening
torque of 5 kg/cm.
.
have snapped into the
on the mechanism chassis.
, use the torque gauge
Screws
FE head
connector
Tray lock
lever
ACE head
connector
Flat cable
Fig.3-2-1
Hook
Hole
Dowel
Cassette mechanism assembly
Screws
Mechanism
chassis
Hook
Hole
Fig.3-3-1
Ensure correct
interlocking
Pinion gear
Tray
Lid opener
lever
Fig.3-2-2
–9–
Drive gear
Lock gear
Ensure correct
interlocking
Start rack gear
Fig.3-3-2
3-3-2. CASSETTE DRIVE GEAR (See Fig.3-3-3)
1) Refer to section 3-3-1 and remove the cassette mechanism assembly.
2) Remove clamps
holder
3) Remove the clamp
4) Remove the clamp
.
and , then remove the gear
, then remove the pinion gear .
, 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,
all the 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
holder
Tray
.
and snap in to the gear
Apply
grease
Pinion gear
(grease the
outer rim of
Clamp
the teeth)
3-3-3.DOOR OPENER, UNDER FRAME AND
STAND L (See Fig.3-3-4)
1) Remove the cassette mechanism assembly, referring
to section 3-1.
2) Remove the two clamps
frame
3) Press down the tray lock lever
lever
you. In this state, press the clamp
door opener lever
4) Remove the special washer
washer
5) Remove the two clamps
Be careful not to exert too much force on the clamps
, pulling it towards you.
, and loosen the tray , lifting it away from
.
.
, as this could cause damage.
and take out the under
and the lid opener
and remove the
, then remove the
and take out the stand L .
ASSEMBLY NOTES:
1. Apply grease (VHJ-0100) to the grooves on the
stand L, the inside of the hole
and the mounting hole
the stand R.
2. Before fitting the stand L
tray
back as far as the EJECT mode position. Put
the two pins
the stand L. Put the drive shaft
3. Be sure to fasten the two clamps
on the stand R, and to fasten the two clamps on
the stand L.
on the tray into the grooves on
in the door opener lever of
in the drive shaft ,
, be sure to move the
into the hole .
and the clamp
Drive gear
Clamp
Lock gear
(grease the outer rim
of the teeth)
Gear holder
Special
washer
Fig.3-3-3
Washer
Grooves
Hole
Clamp
Drive
shaft
Door opener
lever
Under frame
Stand L
Pins
Clamp
Tray
lock lever
Tray
Clamp
Lid opener
lever
Clamps
Stand R
Hole
Fig.3-3-4
–10–
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