SHARP vlmc500, VLMC500U, VLMC500K Service Manual
SERVICE MANUAL
VL-MC500U/K
SERVICE MANUAL
S72M7VL-MC500
LIQUID CRYSTAL DIGITAL CAMCORDER NTSC
VL-MC500U
LIQUID CRYSTAL DIGITAL CAMCORDER
1. IMPORTANT SERVICE NOTES ........................................................................................................ 2
2. SPECIFICATIONS.............................................................................................................................. 6
3. PART NAMES .................................................................................................................................... 7
4. DISASSEMBLY OF THE SET............................................................................................................ 8
5. MECHANISM ADJUSTMENT JIGS AND PARTS............................................................................ 10
6. INSPECTION AND MAINTENANCE
ITEMS AND INTERVALS ................................................................................................................. 11
NTSC
MODELS VL-MC500U/K
7. MECHANICAL ADJUSTMENTS AND CHECKS.............................................................................. 12
8. TAPE RUNNING ADJUSTMENT ..................................................................................................... 15
9. MECHANICAL SECTION ASSEMBLY AND PARTS REPLACEMENT
(DISASSEMBLY AND REASSENBLY) ........................................................................................... 17
10.ADJUSTING THE ELECTRICAL CIRCUITS.................................................................................... 24
11.USEFUL TIPS................................................................................................................................... 41
12.SIGNAL FLOW DIAGRAMS ............................................................................................................. 42
13.BLOCK DIAGRAMS ......................................................................................................................... 45
14.SCHEMATIC DIAGRAMS ................................................................................................................ 52
15.SEMICONDUCTOR LEAD IDENTIFICATION ............................................................................... 108
16.PRINTED WIRING BOARD ASSEMBLIES.................................................................................... 110
17.REPLACEMENT PARTS LIST ....................................................................................................... 125
18.PACKING OF THE SET ................................................................................................................. 145
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
CONTENTS
VL-MC500K
Page
SHARP CORPORATION
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
1
VL-MC500U/K
1. IMPORTANT SERVICE NOTES
BEFORE RETURNING THE VIDEO CAMERA
RECORDER
Before returning the video camera recorder to the user,
perform the following safety checks.
1. Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the video camera
recorder.
2. Inspect all protective devices such as non-metallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields, isolation resistor/capacitor networks, mechanical insulators etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
· Plug the AC line cord directly into a 120 volt AC outlet
(Do not use an isolation transformer for this test).
· Using two clip leads, connect a l.5k ohm, 10 watt resistor
paralleled by a 0.15µF capacitor in series with all
exposed metal cabinet parts and a known ground,
such as a water pipe or conduit.
· Use a VTVM or VOM with 1000 ohm per volt, or higher
sensitivity or measure the AC voltage drop across the
resistor (See Diagram).
· Move the resistor connection to all exposed metal
parts having a return path to the chassis (antenna
connections, metal cabinet, screw heads, knobs and
control shafts, etc.) and measure the AC voltage drop
across the resistor. Reverse the AC plug (a non
polarized adaptor plug must be used but only for the
purpose of completing these checks) on the set and
repeat the AC voltage measurements for each exposed metallic part. Any reading of 0.45V rms (this
corresponds to 0.3mA rms AC.) or more is excessive
and indicates a potential shock hazard which must be
corrected before returning the video camera recorder
to the user.
VTVM
AC SCALE
1.5k ohms
10W
0.15 µF
TEST PROBE
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
1. NOTES DE SERVICE IMPOR TANTES
AVANT DE RENDRE LE MAGNETOSCOPE
Avant de rendre le magnétoscope à l’utilisateur, effectuer
les vérifications de sécurité suivantes.
1. Vérifier toutes les gaines de fil pour être sûr que les fils
ne sont pas pincés ou que le matériel n’est pas coincé
entre le châssis et les autres pièces métalliques dans le
magnétoscope.
2. Vérifier tous les dispositifs de protection tels que les
boutons de commande non métalliques, les matériaux
d’isolement, le dos du coffret, les couvercles de
compartiment et ajustement ou les boucliers, les
réseaux de résistance / condensateur d’isolement,
Ies isolateurs mécaniques, etc.
3. Pour être sûr qu’il n’y a aucun risque de choc électrique,
vérifier le courant de fuite de la maniére suivante.
· Brancher le cordon d’alimentation secteur directement
dans une prise de courant de 120 volts. (Ne pas
utiliser de transformateur d’isolement pour cet essai).
· Utiliser deux fils à pinces et connecter une résistance
de 10 watts 1,5 kohm en parallèle avec un
condensateur de 0,15 µF en série avec des pièces du
coffret métallique exposées et une masse de terre
connue telle qu’un tuyau ou un conduit d’eau.
· Utiliser un VTVM ou VOM avec une sensibilité de
1000 ohms par volt ou plus ou mesurer la chute de
tension CA entre la résistance (voir diagramme).
· Déposer la connexion de la résistance à toutes les
pièces métalliques exposées ayant un parcours de
retour au châssis (connexions d’antenne, coffret
métallique, tétes de vis, boutons et arbres de commande,
etc.) et mesurer la chute de tension CA entre la résistance.
Inverser la fiche CA (une fiche intermédiaire non polarisée
doit être utilisée à seule fin de faire ces vérifications.) sur
l’appareil et répéter les mesures de tension CA pour
chaque piéce métallique exposée. Toute lecture de
0,45 V rms (ceci correspond à 0,3 mA rms CA) ou plus
est excessive et signale un danger de choc qui doit être
corrigé avant de rendre le magnétoscope à son
utilisateur.
VTVM
ECHELLE CA
1.5KOHMS
10W
0.15 µF
SONDE D'ESSAI
VERS PIECES
METALLIQUES
EXPOSEES
CONNECTER A
UNE MASSE DE
TERRE CONNUE
2
VL-MC500U/K
WARNING :TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NO T EXPOSE
THIS APPLIANCE TO WET LOCATIONS.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK. DO NOT REMOVE COVER. NO
USER·SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
This symbol warns the user of uninsulated
voltage within the unit that can cause dangerous electric shocks.
This symbol alerts the user that there are
important operating and maintenance instructions in the literature accompanying this unit.
CAUTION
This symbol mark means following.
For continued protection against fire hazard, replace only with same type fuse.
(CP1; 1.25A 24V, CP2; 1.25A 24V, CP3;
1.25A 24V, CP4; 0.5A 50V)
*Note: CP4 is except for VL-MC500K.
This symbol mark means following.
For continued protection against fire hazard, replace only with same type fuse.
(F1; 1A 50V)
Camcorder
only
Battery Charger
only
ATTENTION:POUR REDUIRE LES RESQUES D'INCENDIE OU DE CHOC ELECTRIQUE,
NE PAS EXPOSER CET APP AREIL A LA PLUIE OU A L'HUMIDITE.
ATTENTION
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
ATTENTION: AFIN DE REDUIRE LES RISQUES DE
CHOC ELECTRIQUE, NE PAS RETIRER LE
COUVERCLE, AUCUN ORGANE INTERNE
NE PEUT ETRE REPARE PAR
L'UTIUSATEUR, CONFIER L'APPAREIL A
UN DEPANNEUR QUALIFIE.
Ce symbole signale à l'utilisateur la présence
d'une tension non isolée à l'intérieur de l'appareil
qui peut être la cause de secousses électriques
dangereuses.
Ce symbole avertit l'utilisateur que des instructions importantes relatives à l'utilisation
et àl'entretien se trouvent dans le manuel
accompagnant l'appareil.
ATTENTION
Ce symbole signifie que l'on devra utiliser un fusible de même type (CP1;
1,25A 24V, CP2; 1,25A 24V, CP3; 1,25A
24V, CP4; 0,5A 50V, F1; 1A 50V) pour
assurer la sécurité.
*Note: CP4 est excepté VL-MC500K.
Ce symbole signifie que l'on devra utiliser un fusible de même type (F1; 1A
50V) pour assurer la sécurité.
Camcorder
seulement
Chargeur de la
pile seulement
3
VL-MC500U/K
NICKEL-CADMIUM BATTERY
The following program is available in the United States. Please consult local environmental
authorities concerning the availability of this or other programs in your area.
The RBRCTM Seal
SHARP participates in the RBRC
States. The RBRC
voluntarily participating in an industry program to collect and recycle these batteries. The RBRC
program provides you with a convenient alternative to placing spent Nickel-Cadmium battery packs into
the trash or municipal waste stream, which is illegal in some areas. At the end of their useful life, the
Nickel-Cadmium battery can be dropped off at the nearest collection center for recycling. For information
on the nearest collection center, call 1-800-8-BATTERY or your local recycling center. If you are located
outside the United States, contact your local authorities for information concerning proper disposal and/
or recycling of this battery. SHARP’s involvement in this program is part of our commitment to protecting
our environment and conserving natural resources.
[Footnote] *RBRCTM is trademark of the Rechargeable Battery Recycling Corporation.
CAUTION
BEFORE BATTERY DESTROY
TM* Nickel-Cadmium Battery Recycling Program in the United
TM Seal on our battery pack contained in our product indicates that SHARP is
TM
NICKEL-METAL HYDRIDE BATTERY
LITHIUM or LITHIUM-ION BATTERY
SEALED LEAD BATTERY
Battery disposal
Contains the above (Rechargeable) Battery. must be recycled or disposed of properly.
Remove the Battery from the products and contact Federal or State Environmental Agencies for
information on recycling and disposal options.
4
VL-MC500U/K
■ PRECAUTIONS FOR USING LEAD-FREE SOLDER
1) Employing lead-free solder
"Main PWB", "Camera head PWB", "Audio I/O PWB", "Card PWB", "Inverter PWB", "Operation PWB", "DC Jack PWB",
"CCD PWB" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the
PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
Indicates lead-free solder of tin, silver and copper
2) Using lead-free solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead
wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend you to
use a dedicated soldering bit. If you are not familiar with how to obtain lead-free solder or soldering bit, contact our
service station or service ranch in your area.
3) Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is 220°C which is higher than the conventional lead solder by 40°C,
and as it has poor solderability, you may be apt to keep the soldering bit in contact with the PWB for extended period
of time. However, since the land may be peeled off or the maximum heat-resistance temperature of parts may be
exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and
off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every
use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Lead-free wire solder for servicing
Part No. ★ Description Price Code
ZHNDAi123250E J φ0.3mm 250g(1roll) BL
ZHNDAi126500E J φ0.6mm 500g(1roll) BK
ZHNDAi12801KE J φ1.0mm 1kg(1roll) BM
5
VL-MC500U/K
2. SPECIFICATIONS
Recording/Playback Time: 90 minutes (DVM60, LP mode)
Lens Filter Diameter: 30 mm
Color Temperature Compensation: Auto white balance with white balance lock, outdoor or indoor
Minimum Illumination: 3 lux (15 lux measured by EIA standard)(with gain-up, F1.8)
Still Image Compression System: JPEG base line conformance
Still Image Recording Format: JPEG (Exif2.1)
Still Image Recording Medium: SD Memory Card, MultiMediaCard
Power Requirement: DC 7.4 V
Power Consumption: 5.0 W (during camera recording in Full Auto mode with zoom motor off and
Operating Temperature: 32°F to 104°F (0°C to +40°C)
Storage Temperature: –4°F to 140°F (–20°C to +60°C)
Dimensions (approx.): 5 23/32" (W) × 3 7/16" (H) × 2 5/8" (D)
Signal System: NTSC standard
Recording System: 2 rotary heads, helical scanning system
Cassette: Digital VCR Mini DV video cassette
Tape Speed: SP mode: 18.812 mm/second
LP mode: 12.555 mm/second
Pickup Device:1/4" (6.4 mm, effective size: 4.5 mm) CCD image sensor
(with approx. 1,330,000 pixels including optical black)
Lens: 10 × optical/300 × digital power zoom lens (F1.8, f=3.6-36.0 mm), full-range auto
focus
Monitor: 3" (7.5 cm) full-color LCD screen (TFT active matrix)
Microphone: Electret stereo microphone
backlight normal mode)
Operating Humidity: 30% to 80%
[145.0 mm (W) × 87.0 mm (H) × 66.6 mm (D)]
Weight (approx.): 1.12 lbs (508 g)(without battery pack, lithium battery, video cassette, lens cap,
lens hood and card)
AC Adapter
UADP-0339TAZZ(MC500U)
UADP-0341TAZZ(MC500K)
Power Requirement: AC 110-240 V, 50/60 Hz
DC Output: 10 V
Dimensions (approx.): 1 31/32" (W) × 1 1/16" (H) × 2 19/32" (D)
[50mm (W) × 27.0mm (H) × 65.5 mm (D)]
Weight (approx.): 0.22 lbs (100 g)
Specifications are subject to change without notice.
SERVICE INFORMATION (For the U.S.)
For the location of the nearest Sharp Authorized Service, or to obtain product literature, accessories,
supplies or customer assistance, please call 1-800-BE SHARP (1-800-237-4277) or visit SHARP's
website (http://www.sharp-usa.com)
6
3. PART NAMES
For details on the use of each control.
VL-MC500U/K
Hand strap
Light adjustment sensor
Flash
Hand grip
Stereo microphone
Zoom lens
Cassette holder
Speaker
Start/Stop
button
PHOTO button
Remote sensor
DISPLAY button
Battery release
Flash cover release
Media Selection
switch ( Tape
mode/ Card
mode selection
switch)
Card slot cover
release
Card slot cover
Cassette compartment door
Cassette compartment door release
Earphones jack
USB terminal
AV terminal
DV terminal
Terminal cover
Power Zoom Wide angle/
Telephoto control/
VOLume control
Operation button
LCD monitor
Battery mounting surface
Tripod adapter socket
Power switch ( Camera
Recording mode/
Playback mode select
switch)
7
VL-MC500U/K
4. DISASSEMBLY OF THE SET
Note:
Before removing the cabinet, turn off the power supply, and ascertain that the battery have been removed.
1.
(d)
Battery Unit
1) Detach the battery unit.
2) Remove the three screws ((d)XiPSN17P03000).
3) Remove the one screw ((c)LX-HZ0050TAFN).
4) Detach the LCD cabinet in the direction of the arrow.
(c)
3.
LCD Panel
FPC
(d)
(d)
1) Remove the FPC of the LCD panel, and detach the LCD panel
in the direction of the arrow.
4.
(d)
(d)
(d)
2.
Speaker Wire Connect
(d)
1) Remove the two screws ((d)XiPSN17P03000).
2) Disconnect the speaker wire connector.
3) Detach the side cover in the direction of the arrow.
Tillt FPC
(d)
Main PWB
(d)
Inverter PWB
(d)
FPC
(d)
connector
(d)
1) Remove the four screws ((d)XiPSN17P03000), the tilt FPC
and the tilt wire connector to detach the lens section.
2) Remove the two screws ((d)XiPSN17P03000) to detach the
main PWB.
3) Remove the one screw ((d)XiPSN17P03000) and the FPC to
detach the inverter PWB.
8
5.
(a)
(a)
(b)
(a)
(d)
(d)
(d)
(d)
(d)
Battery Cover
(d)
(d)
(d)
(f)
(f)
(f)
(d)
(d)
(d)
(d)
(d)
Camera Rear Cabnet
Camera Front Cabnet
Lithium Battery Lid
(d)
(d)
Connect
Connect
FPC
Connect
(d)
(d)
(d)
1) Take out the mechanism in the direction of the arrow.
2) Remove the three floating screws ((a)LX-BZ0251TAFD) and the
one floating screw ((b)LX-BZ0253TAFN).
3) Remove the five screws ((d)XiPSN17P03000) to detach the battery
cover.
VL-MC500U/K
6.
1) Detach the lithium battery lid.
2) Turn the tilt section in the direction of the arrow, and remove the five
screws ((d)XiPSN17P03000) and the three screws
((f)XiPSN17P04000) which fix the camera front cabinet. Then
detach the camera front cabinet in the direction of the arrow.
3) Remove the three screws ((d)XiPSN17P03000) fixing the camera
rear cabinet and the one screw ((d)XiPSN17P03000) fixing the
hand strap fitting.
4) Disconnect the microphone wire connector, and detach the camera
rear cabinet in the direction of the arrow.
7.
1) Remove the three screws ((d)XiPSN17P03000) to detach the
angle.
2) Remove the two screws ((d)XiPSN17P03000), the three connectors and the two FPCs, and detach the tilt section in the direction
of the arrow.
9
VL-MC500U/K
5. MECHANISM ADJUSTMENT JIGS AND PARTS
5-1. Mechanism check adjustment jigs
1. PB-use cassette
Torque meter
2. 9DASD-1015
3. DB
* 1mN·m/1.5mN·m
50 or more
ø2
No. 0 cross-bit
No. 00 cross-bit
1. Torque screwdriver
150mN·m
2. JiGTD1500RTDH
3. CB
1. Torque gauge
2. JiGTG0045
3. CN
*
For use in VS-REW wind-
ing torque measurement.
1. Master plane
2. 9EQMP-VLPD1
3. CL
* For checking reel base
height.
1. Torque gauge head
2. 9EQTGH-DH5000
3. BW
* For use with the torque
gauge listed left.
1. Height adjustment jig
2. 9DAHG-PD1
3. BZ
* For height adjusting.
<Note: The entries of list>
1. Tension gauge 4N
2. JiGSG0400
3. BK
* For measurement of
pinch roller pressure.
1. Height adjustment
screwdriver
2. 9EQDRiVER-DH5
3. BC
*
For guide roller adjustment.
Configuration
1. Name
2. Part No.
3. Code
* Model, Uses Remarks
1. Dial tension gauge
2. 9DAPTG-10-10W
3. CA
* PTG-10
*
For Tu guide adjustment.
*
For T roller adjustment.
*
Bit shape (see figure below).
Tolerance ± 0.1
2
1.4
Tip thickness 0.5
3
<Miscellaneous>
(1) Slide caliper
(2) Precision screwdrivers
1. Alignment tape – ( I )
2. VR3-GAZXS
3. CF
*
For tape running
adjustment.
1. Alignment tape – ( II )
2. VR3-GTZQS
3. CG
*
For SW point adjustment.
* 90ADVC-TAPE can use,
too.
1. For hexagon nut
opposite side 3mm bit.
2. 95CM22001
3. BL
* For S guide hexagon
nut installation.
(Phillips head and slotted)
(3) Radio needle-nose pliers
(4) Tweezers
5-2. Parts for regular periodic inspection and maintenance
1. Oil
Cosmo Hydro HV22
2. 9EQ-Oil-HV22
3. AE
* Cosmo Petroleum K.K.
1. Cleaning paper
2. JiGDUSPER
3. AP
* DUSPER ∑ (SIGMA)
(Ozu Co., LTD.)
<How to make jigs for mechanism checking and adjustment>
(1)Reel hub for back tension measurement (Fig. 1)
1) Obtain a commercially available cassette tape reel hub.
(Disassemble the cassette tape and remove the tape from
the reel hub.)
2) Paste one end of a string (about 20cm long) to the reel hub
with (for example) cellophane tape.
3) Paste the weight of about 0.21N on the upper side reel hub.
(2)String for use in pinch roller snap-fit force measurement (Fig. 2)
1) Obtain an approximately 20cm length of commercially available string.
2) Tie the 2 ends together to form a loop.
1. Grease: Moly Coat
YM-103
2. 99FGREASE-YM103
* Dow corning
1. Screw lock (1401B)
* Three Bond
<Note:
The entries of list>
1. Cleaning liquid:
Industrial-use ethyl alcohol
* Commercially available item
1. Extremely thin cotton swab
* Commercially available item
Weight
Reel hub
Fig. 1
Configuration
1. Name
2. Part No.
3. Code
* Model, Uses Remarks
String
String
Fig. 2
10
VL-MC500U/K
6. INSPECTION AND MAINTENANCE ITEMS AND INTERVALS
In order to keep the mechanical section always in good condition, perform the following inspection and maintenance at regular intervals.
In addition, after repair, perform the following maintenance items regardless of how long the user has been using the unit.
6-1. List of inspection and maintenance items
Inspection and
maintenance location
Tape running section (see section 8-3)
Drum section, Video head
(see section 8-3)
Tape running system
Timing belt
Pinch roller
Capstan motor
Swing arm
S reel base, Tu reel base
Center pulley shaft
Intermediate pulley shaft
Swing arm boss
Drive system
Intermediate gear A shaft,
Intermediate gear B shaft
Loading motor
Mode switch
Abnormal noise
PB · VS/R winding torque
PB · VS/R · loading back tension
Tu reel base ratchet torque
S reel base no-load torque
Performance checks
500 1,000 1,500 2,000 3,000
<Rollers>
• Replace if there is anything abnormal in the rotation, or if there is run-out
(that becomes large).
<Other than the above>
• Clean the section that contacts the tape (especially the lower drum helical
section). Use the specified cleaning liquid.
Time of use (h)
[Oil] Cosmo Hydro HV22
[Grease] Moly Coat YM-103
• • • Replace. • • • Clean. • • • Lubricate. • • • Check.
Symptoms that indicate
need for maintenance
• Block-type noise
• Head hole clogging
• Tape damage
• The tape fails to run.
• The tape becomes slack.
• Block-type noise
• Abnormal noise
• Abnormal noise
• Cannot eject.
• Fails to enter a mode.
• The tape fails to run.
• The tape becomes slack.
• Tape damage
• The play-back image is
abnormal.
[Screw lock] Three Bond 1401B
[Cleaning liquid] Industrial-use ethyl alcohol
Note:
Replace the drum ass'y if the
video head is cleaned but the
envelope still does not appear.
(When the envelope is normal,
refer to "11. USEFUL TIPS".)
• Replace if there is anything
abnormal.
• Lubricate with oil.
[Oil]
Cosmo Hydro HV22
Note:
• Replace if anything is abnormal
(including the noise).
• Replace any part that fails to
perform within the standard.
Remarks
Apply oil to the shaft, then
wipe lightly with a cloth.
6-2. Precautions
(1) When replacing any part, always replace the cut washer that was
removed with a new one.
(2) This mechanism does not have control adjustment. If the control
cannot be set as required, clean and or replace parts.
(3)On the oil
a) Always use the specified oil. (Using another kind of oil can cause
various kinds of trouble.)
b) Always use clean oil, without any mixed-in dirt, to lubricate bearings.
(Using oil with dirt mixed in can cause the bearings to wear or to
stick.)
c) One drop of oil is the amount shown in the Fig. 1, on the point of a
pin.
(4)Perform circuit repair, tape running adjustment, etc. with the cassette
controller assembly attached to the mechanism.
(5)When operating the mechanism separately, apply voltage to the
loading motor. However, the terminal voltage must be DC3V~4V.
(When the mechanism is connected to the main PWB, do not apply
external voltage to the loading motor. It may cause a trouble.)
(Forcing the gears to turn by hand entails danger of breakage.)
If the mechanism is separated from the unit, the capstan motor may rub
and be damaged if spacing under the mechanism is inadequate.
(6)To install the cassette controller, push section A in the Fig. 2. Do not
push anything else.
(7)Do not deform any of the mechanical parts.
Oil
1.5mm diameter or less
Fig. 1
11
Fig. 2
VL-MC500U/K
7. MECHANICAL ADJUSTMENTS AND CHECKS
The items discussed here relate to general on-site servicing (field servicing). Adjustments and replacements that require
sophisticated facilities, jigs and technology are omitted.
In addition, in order to maintain the characteristics that the unit has when it is new, not only are inspection and maintenance necessary,
but it is absolutely necessary that, for example, the tape not be damaged, and always use jigs for adjustments that require them.
<Precautions>
(1)Always set the power supply and state of the unit as follows Notes for mechanism adjustments and checks.
AC adapter used, with cassette controller assembly
AC adapter used, without cassette controller assembly (Independent Mechanism)
DC3V, without cassette controller assembly (Independent Mechanism)
(2) When the mechanism is connected to the main PWB, do not apply external voltage to the loading motor. It may cause a trouble.
(3) Always run the tape with the cassette controller assembly attached.
7-1. Checking the playback (recording) winding torque AC adapter used, with cassette controller assembly
(1)Set the torque cassette with the cassette controller assembly attached, then, in SP recording mode (playback mode if a signal has
already been recorded in SP mode on the tape), confirm that the torque on the winding side is within the standard.
<Winding torque standard in record (playback) mode>
(If there is torque ripple, read the center value.)
0.70 +0.4/-0.3mN·m, ripple 0.4mN·m or less
7-2. Checking the rewinding playback (VS-REW) winding torque
AC adapter used, without cassette controller assembly (Independent Mechanism)
(1)Remove the cassette controller assembly, press the DOWN switch, using the
adhesive tape and referring to 9-3, operate in the TEST mode (T01) to rewind,
and set the rewinding playback (VS-REW) mode.
(2)Set the torque gauge on the S reel base, press the front end of tension post with
your finger in the arrow A direction so as to ascertain that the winding torque is
as specified. (Check without rotating the torque gauge.)
<Rewinding playback (VS-REW) winding torque standard>
(If torque ripple exists, read its center value.)
1.6 ± 0.6mN·m, ripple 0.5mN·m or less
(3)After checking the winding torque remove the torque gauge, and remove the
adhesive tape used in item (1) above (refer to 9-3). The STANDBY mode is set
automatically.
Fig. 1. Removal of tension band when
measuring the rewinding playback (VS-REW) winding torque
7-3. Checking of reel base height DC3V, without cassette controller assembly (Independent Mechanism)
(1)Remove the cassette controller assembly (refer to 9-2).
(2)Referring to 9-1, apply DC3V to the loading motor and put the system into playback mode.
(3)Taking adequate care so that the master plane does not contact drum, running parts (guide roller, etc.), or the MIC contacts. Fit
the master plane holes to the 2 guides (A and B) in Fig. 2.
(4)Confirm that the heights of the S reel base reel receiving surface and the Tu reel base reel receiving surface below the master plane
top surface are within the set values, using, for example, a slide calliper (Fig. 3).
When checking the S reel base height, press the front end of tension post in the arrow A direction with your finger to release the
tension band, and then check the height in this state (Fig. 1).
(5)If the height is not within set values, replace the washer under the reel base, and adjust as specified.
Note: After the adjustment, make sure that the reel bases rotate smoothly.
Reel receiving
surfaces
2.4 ± 0.1
2.4 ± 0.1
Reel base height
setting values
Reel base height
Fig. 3
A
setting values
MIC contacts
Fig. 2
B
12
7-4. Back tension torque check and adjustment in record (playback) mode
AC adapter used, with cassette controller assembly
(1)Checking
Set the torque cassette (SD-1015), and make sure in the SP record mode that
the supply side torque is within the standard shown below (or in the playback
mode for the tape on which the signal has been SP-recorded).
<Standard>
(If torque ripple exists, read its center value.)
0.7 ± 0.1mN·m
(2)Adjustment (Fig. 4)
If the value is out of standard range, adjust, using the screw 1 shown in Fig. 4.
1. Loosen the screw 2 slightly.
2. Adjust to turning the screw 1. When back tension is too high, turn the screw
1 counterclockwise (CCW).
When back tension is too low, turn the screw 1 clockwise (CW).
3. After adjustment fix the angle with the screw 2. (At this time take care so as
to prevent excessive tightening.) Apply Screw Lock to the screw 1.
<Caution>
Screw tightening torque: 0.04N·m
7-5. Checking and adjustment of tension roller position in
record (playback) mode
DC3V, without cassette controller assembly (Independent Mechanism)
(1)Checking
Before winding the 60-min tape make sure that the tension roller is in the same
position as S guide as shown in Fig. 4.
If not, take out the tape and adjust in the following procedure.
(2)Adjustment (Fig. 5)
1. Set the playback mode without loading the tape.
2. Loosen the screw 3 slightly (to such an extent that the tension band holder
4 can be moved).
3. If the tension roller is inside from the specified position, shift the tension
band holder 4 in the arrow
the tension band holder in the arrow
(Proper shift must be 0.2 to 0.6mm outside from the specified position.)
4. Check the position by the procedure described in item (1) Checking above.
5. If the position is not specified position, adjust again.
direction. If the tension roller is outside, shift
A
direction, and fix with the screw 3.
B
Apply screwlock
Tension roller position (S guide standard)
Screw2
Screw1
CCW
CW
Fig. 4. Check (tape exists)
Tension roller position (S guide standard)
0.2~0.6mm (Standard)
Tension roller
VL-MC500U/K
0 ± 0.3
S guide
Tension band holder 4
Screw 3
7-6. Checking of supply S reel base no-load torque
DC3V, without cassette controller assembly (Independent Mechanism)
(1)Remove the cassette controller assembly, then apply DC3V to the loading
motor and put the system into L. start mode (refer to 9-1).
(2)Move the swing arm toward the Tu reel base side.
Be careful not to cause damage to the gears and other parts in the process.
(Fig. 6)
(3)Set a back tension measurement reel hub on the S reel base.
(4)Using a dial tension gauge, pull the string in the A direction, then confirm that the
tension is within the standard.
<FF back tension standard>
(If the tension fluctuates, read its center value.)
30mN or less
7-7. Checking of loading back tension
DC3V, without cassette controller assembly (Independent Mechanism)
(1)Remove the cassette controller assembly, then apply DC3V to the loading
motor and put the system into L. start mode. (refer to 9-1)
(2)Move the swing arm toward the S reel base side. Be careful not to cause
damage to the gears and other parts in the process. (Fig. 7)
(3)Set a back tension measurement reel hub on the Tu reel base.
(4)Using a dial tension gauge, pull the string in the A direction, then confirm that
the tension is within the standard.
Fig. 5. Position adjustment
(tape does not exist)
Move the swing arm
A
toward the Tu reel
base side.
Fig. 6. S reel base no-load torque
measurement method
13
VL-MC500U/K
<REW back tension standard>
(If the tension fluctuates, read its center value.)
15 ± 12mN
7-8. Checking of winding Tu reel base ratchet torque
DC3V, without cassette controller assembly (Independent Mechanism)
(1)Remove the cassette controller assembly, then apply DC3V to the loading
motor and put the system into standby mode. (refer to 9-1)
(2)Move the swing arm toward the S reel base side.
Be careful not to cause damage to the gears and other parts in the process.
(Fig. 8)
(3)Set a back tension measurement reel hub on the Tu reel base.
(4)Using a dial tension gauge, pull the string in the A direction, then confirm that
the tension is within the standard.
<Winding Tu reel base ratchet torque standard >
(If the tension fluctuates, read its center value.)
100mN or less
7-9. Checking of rewinding playback (VS-REW) back
tension
DC3V, without cassette controller assembly (Independent Mechanism)
(1)Remove the cassette controller assembly, then apply DC3V to the loading
motor and put the system into rewinding playback (VS-REW) mode. (refer to
9-1)
(2)Move the swing arm toward the S reel base side.
Be careful not to cause damage to the gears and other parts in the process.
(3)Set a torque gauge on the Tu reel base.
(4)Turning the torque gauge to counterclockwise (1 turn for 3 seconds), then
confirm that the torque is within the standard.
<Rewinding playback (VS-REW) back tension standard value>
(If the tension fluctuates, read its center value.)
0.70 +0.6/-0.3mN·m
Move the swing arm
toward the S reel
base side.
A
Fig. 7. Loading back tension measurement
method
7-10.Checking of pinch pressing force
DC3V, without cassette controller assembly (Independent Mechanism)
(1) Set the pinch roller pressing force measuring thread on the pinch lever
(position A , Fig. 9).
(2)Set the mechanism to the playback mode, press the pinch roller against the
capstan shaft.
(3)Fit the tension gauge to the pinch roller pressing force measuring thread, pull
in the arrow B direction shown in Fig. 11 to separate a little the pinch roller from
the capstan shaft.
(4)Gradually return the pinch roller, and when the pinch roller contacts parallel
the capstan shaft, read the value (see Fig. 10) to make sure that the value
conforms to the standard shown below.
<Standard>
1.8 +0.3/-0.5N
<Caution>
After making this measurement, quickly release the system from playback
mode and remove the pinch roller from the capstan shaft. (If the pinch roller
is left fitted onto the capstan shaft for a long time, the pinch roller will be
deformed.)
A
OK
NG
Move the swing arm
toward the S reel
base side.
A
Fig. 8. Winding Tu reel base ratchet torque
measurement method
Pinch roller
Right guide
Capstan shaft
B
Fig. 9
Fig. 10
Fig. 11
14
8. TAPE RUNNING ADJUSTMENT
8-1. Adjustment locations
VL-MC500U/K
<Replacement parts>
· T roller, arm
· Tu guide, arm
· Slide chassis
<Replacement parts other
than those shown above>
· S guide
· Pole base
· Guide roller
· Drum assembly
· Capstan motor, etc.
Adjust the height of only
replaced parts with the
adjusting jig.
Adjustment procedure 8-2
Height presetting is not
necessary.
Cassette controller
installation
Running adjustment preparation
Adjustment
procedure 8-3
Running rough
adjustment
Adjustment
procedure 8-4
Running final
adjustment
Adjustment
procedure 8-5
8-2. Running height adjustment
· After replacement of T roller or Tu guide adjust the height . (Adjust only the replaced parts.)
· After height adjustment do not turn the T roller. If crease is found on the tape of Tu guide, remove the crease by rotating.
(As for details refer to the “Running rough adjustment”.)
· After height adjustment of T roller or Tu guide, apply Screw lock to an end of shaft.
(After replacement of S guide apply Screw lock to same point, too.)
Tu guide
T roller
Height setting
jig
Lower edge
fitting
Master plane
Fit height the par on low edge fitting.
After setting adjustment jigs, turn T roller
counterclockwise to 315°.
Master plane
Height setting
jig
Height setting
jig
Master plane
8-3. Preparation for tape running adjustment
Meters, jig… Oscilloscope, Adjustment remote control, Height adjustment screw driver, Alignment tape (for tape running
adjustment, for switch point adjustment), Master plane, Height adjustment jig.
<Method and description>
(1)Clean the tape running surface (especially, adequately clean
the drum surface and the lower drum helicam surface).
(2)Attach the cassette controller.
(3)Connect an oscilloscope to each TP on the relay circuit board.
(4)Turn the AC adapter power ON.
(5)Using the adjustment remote control unit, put the system TEST
mode T-05.
(6)Replay the alignment tape for running adjustment, and make
sure that the tape is running in the SP mode.
(7)Check the oscilloscope playback envelope, then, at +1/4 shift
and -1/4 shift, check whether all of it is flat. If it is not, perform
the following adjustment so that it becomes flat.
(Each time you push the PLAY key, the shift will change;
+1/4 shift → Normal → -1/4 shift → Normal , in order.)
Sup guide roller
Tension roller
Drum
S guide
Tu guide roller
Tu guide
Pinch roller
Reels
15
VL-MC500U/K
8-4. Running rough adjustment
(With cassette controller)
1) Su, Tu guide roller height adjustment
<Method and description>
(1)Loosen the guide roller lock screw, then tighten loosely so that
the roller turns easily.
(2)Replay an alignment tape, and adjust the Sup, Tu guide roller
so that the envelope sides of entrance and exit are flat.
(3)Perform ± 1/4 shift, then, as in the above case, adjust until the
envelope becomes flat.
* If running is difficult for the entrance changed, turn the T roller
to counterclockwise 180°. (refer to Fig. 1)
2) Check of V/SR envelope wave form
<Method and description>
(1)Confirm that the envelope waveform peaks in V/SR mode are
uniform.
(2) If they are not uniform, fine-adjust the guide roller and the Tu
guide.
3) Check of tape wrinkles
<Method and description>
(1)Check that the tape is not distorted between the Tu guide and
pinch in the PB mode and the V/SR mode.
-If crease is found, make an adjustment in the range of ±180°.
-After adjustment apply Screw Lock.
NG
±1/4 shift ±1/4 shift
Entrance side
Turn to 180°
Exit side
Normal
T roller
Fig. 1
Adjust so that A B.
A
Pinch roller
B
Wrinkles
Tu guide
Deformation
Deformation
NG
•
•
4) Check the rising time of the envelope wave form
<Method and description>
(1)Check the rising time of the envelope when switching from V/SR mode to PB mode. (Within 5 sec)
(2)Check the rising time of the envelope when switching from STOP mode to PB mode. (Within 5 sec)
8-5. Final running adjustment
(With cassette controller)
1) Adjustment of Sup and Tu guide roller height
<Method and description>
(1)Perform ± 1/4 shift, then if the envelope wave's ratio of MAX.
to MIN. are 60% or less, adjust again the height of guide roller.
(Refer to Fig. 2)
(2)Finally adjust the lock screw of Sup and Tu guide roller.
(3)Once perform unloading and then loading to set the PB mode,
and make sure that the envelope waveform does not change.
2) Adjustment of playback SWP
<Method and description>
(1)Playback the alignment tape for switch point adjustment.
(2)Perform SWP automatic adjustment with adjustment remote control.
Fig. 2
* When replacing the mechanism and drum, adjust the phase and equalizer using the adjustment remote control.
(Refer to "10. ADJUSTING THE ELECTRICAL CIRCUITS".)
16
VL-MC500U/K
9. MECHANICAL SECTION ASSEMBLY AND PARTS REPLACEMENT
(DISASSEMBLY AND REASSEMBLY)
Mechanical section disassembly and reassembly are explained in this section.
For removal of the cabinet, etc., refer to 4. DISASSEMBLY OF THE SET.
<Precautions>
1. Always replace cut washers that have been removed, for example in parts replacement, with new ones.
When reassembling, be careful not to allow screws, washers or foreign matter to enter. They can cause mechanical misoperation.
2.
3. Use the cleaning liquid, oil, grease and screw lock that are specified below. Use of any other kind can cause mechanical
misoperation.
Oil: Cosmo Petroleum : Cosmo Hydro HV22 Screw lock: Three Bond :1401B
Grease: Dow Corning : Moly Coat YM-103 Cleaning liquid: Industrial-use ethyl alcohol
9-1. On the mechanical modes
When operating the mechanism separately, apply DC3~4V to the loading motor.
(When the mechanism is connected to the main PWB, do not apply external voltage to the loading motor. It may cause operational problems.)
(1)EJECT mode
The mechanism position to take out the cassette where the
EJECT lever is extremely shifted in the A direction. (It is
impossible to lock the cassette controller assembly in this
mode.)
EJECT lever
A
EJECT mode diagram
(3)LOADING START mode
This is the mode where the tape is wound around the winding
reel when a cassette with visible wind start leader tape is
loaded. (The brake shifter moves to the left, the S main brake
is separated from the S reel base and the Tu main brake is
separated from the Tu reel base.)
(2)STANDBY mode
The mechanism position to set the cassette where the slide
chassis is at the farthest position from the drum and the
EJECT lever is in counterclockwise rotated position (position
where the cassette controller assembly can be locked).
EJECT lever
Rotation
It is hardly seen since
it is concealed with
slide chassis.
Slide chassis
STANDBY mode diagram
(4)REWINDING (VSR) mode
The mechanism position to rewind the tape (fast rewinding
playback). The S and T pole base is pressed, the pinch roller
is pressed to the capstan shaft, the brake shifter VSR brake
section engages with the Tu reel base gear.
T pole base
S pole base
Capstan shaft
Pinch roller
S reel base
S main brake
Brake shifter
LOADING START mode diagram
VSR brake section
Tu reel base
Tu reel base
Tu main brake
REWINDING (VSR) mode diagram
17
VL-MC500U/K
(5)PLAYBACK (RECORD, FF, VSF) mode
The mechanism position for playback, record, FF and fast
feed playback.
The pinch roller is pressed to the capstan shaft, and the S/Tu
main brake is separated from the S/Tu reel base.
Pinch roller
S reel base
S main brake
Capstan shaft
Tu reel base
Tu main brake
(Not visible)
(6)STOP mode
The system is in the STOP (Rec Lock in CAMERA mode)
position; the S and the T pole bases are snap-fitted to the drum
base, the S brake is in contact with the S reel base, and the Tu
brake is in contact with the Tu reel base.
S pole base
S reel base
S main brake
T pole base
PLAYBACK mode diagram
(RECORD, FF, VSF)
STOP mode diagram
9-2. Cassette controller assembly
<Removing>
(1) Apply DC3V to the loading motor to enter the standby mode.
Press the lock lever in the arrow direction to raise the cassette controller. (See Fig. 1; A or B direction.)
(2) Turn the damper lever in the arrow
(3) Remove two screws
, and remove the down guide D in the arrow F direction. (See Figs. 3 and 4.)
E
Take care that the slide chassis is provided with the down guide positioning
(4) Slide the cassette controller in the arrow
and turn the cassette controller in the arrow
(5) Slide the cassette controller in the arrow
direction to release the engagement of the damper bar. (See Fig. 2.)
C
.
or
H
direction, remove the outer link shaft (both sides) toward the inside of the mechanism,
I
direction. (See Fig. 5.)
J
direction. (See Fig. 6.)
K
G
Tu reel base
Tu main brake
<Installing>
(1) Apply DC3V to the loading motor to enter the standby mode.
(2) For assembly, reverse the removing procedure (5) thru (2).
Tightening torque of two screws E: 40±4mN.m
Fig. 1.
Fig. 3.
Fig. 2.
Fig. 4.
Fig. 5.
Fig. 6.
18
VL-MC500U/K
9-3. How to operate with the circuit board without the cassette controller assembly.
In this method, if the procedure is followed incorrectly there is danger of damaging the mechanism and the tape, so except in special
cases, such as when measuring the VSR torque, do not perform this procedure. Normally operate this unit with the cassette controller
assembly attached.
Be sure to follow each caution mentioned.
(1) Apply DC3 ~ 4V to the loading motor to enter the standby mode.
(2) Securely press the movable piece
cellophane tape or similar to turn on SW. (Take care that the
movable piece turns only in the shown arrow direction.)
Note: To enter REC mode, press the pin of the recognition switch
(Unnecessary in other modes.)
(3) Set the test mode (T-01) with the adjustment remote controller
without putting the tape, and the mechanical operation will
become possible with the mode key.
(4) For ejection, remove the tape of (2).
of the down SW with
L
Movable piece
.
M
of down SW.
Side view
Rotary direction of
movable
piece
9-4. Phase matching
Fig. 7. LOADING START mode
Referring to Figs. 8 and 9, align the phase for the following parts.
(1) Eject lever (2) Eject control lever (3) Mode SW (4) Main cam (5) Sub cam
Note: Before disassembly, sufficiently check the marker position.
Note: When installing the joining gears, verify that the phase matching holes of the main cam and subcam are aligned to the hole of
the chassis.
Note: After the phase is aligned, turn the mode SW with hand, and verify that it turns nearly one turn.
(After verification, return it to the original position.)
Eject
control lever
Eject lever
Phase matching hole
(for chassis)
Phase matching hole
(for gear)
Fig. 8
Mode switch
Phase matching
mark
Main cam
Phase matching hole
(for chassis)
19
Coupling
gear
Fig. 9
Sub cam
Phase matching hole
(for chassis)
VL-MC500U/K
9-5. Reassembly
9-5-1. Reassembly in side of the main chassis.
Note) Numbers before part names are given as a guide to the order of assembly.
As for greasing/oiling/cleaning places refer to the attached drawings (Grease/Oil application side of the main chassis).
1.
2.
Pinch control lever
Mode SW
303
463
A-3
EJECT control lever
EJECT lever
360
Groove grease
A-2
A-1
Main cam
304
302
Pinch drive lever
361
Main chassis Ass'y(Front surface)
301
LM/Mode FPC
465
Item
Tightening torque
Quantity
A S Tight · M1.4 x L3 70mN·m3
Cam groove grease
Coupling
gear
370
AHC cam
369
Shifter drive lever
B
Ass'y
305
371
Sub cam
4.
5.
T arm control
lever stopper
363
Phase match check
E
E
H/A PWB angle
315
Center pulley
Ass'y
Drive belt
367
459
Item
Intermediate gear angle
sub Ass'y
F
312
364
365
421
Intermediate gear
stopper
366
Intermediate pulley
Ass'y
Capstan FPC stopper
311
C
Tightening torque
C Special screw · 40mN·m1
M1.4 x L1.6
E S Tight · M1.4 x L4 70mN·m2
F S Tight · M1.4 x L2 70mN·m1
G
G
Enter part of
convexity rear
surfacer
Guide rail sub Ass'y
Phase match check
Guide rail sub Ass'y
(Rear surface)
Quantity
3.
T arm control lever
Groove grease
Groove grease
309
Loading lever
306
Item
Tightening torque
Quantity
BCWø1.2-ø3.0-t0.25 1
Loading motor Ass'y
461
Loading motor
D
fitting Ass'y
Slide chassis
C
guide
386
Item
Capstan motor
462
C
Tightening torque
Quantity
C Special screw · 40mN·m2
M1.4 x L1.6
Special screw with step
D
· 70mN·m1
M1.4 x L6.25
20
G
Special head screw ·
Item
Tightening torque
Quantity
40mN·m2
M1.4 x L1.5
6.
Sup pole base Ass'y
S loading arm
Ass'y
307
S pressure spring
395
372
S loading gear
I
451
H
Guide roller Ass'y
454
Tu loading arm Ass'y
H
396
373
Tu loading gear
Item
Tu pole base
452
Ass'y
I
Guide rail
362
308
Tu pressure spring
Tightening torque
Quantity
HCWø0.7-ø2.2-t0.25 2
I Special screw · 5mN·m2
M1.2 x L1.8
(Tentative tightening)
9-5-2. Reassembly in side of the Slide chassis.
Note) Numbers before part names are given as a guide to the order of assembly.
As for greasing/oiling/cleaning places refer to the attached drawings (Grease/Oil application side of the slide chassis)
VL-MC500U/K
1.
Slide adjustment
angle
Grease
376
S cassette stay
K
382
Tu pole
381
383
352
Tu guide
arm
Ass'y
393
Tu guide
arm SPR.
Tightening torque
397
Guide
adjustment
SPR.
H
Note1)
344
J
F
Grease
353
Brake shifter
Ass'y
331
Slide chassis Ass'y
Item
T roller upper
flange
T roller bottom
flange
F S Tight · M1.4 x L2 40mN·m1
HCWø0.7-ø2.2-t0.25 1
J Special screw · 40mN·m1
M1.2 x L1
Note 1: Use the No. 00 bit.
K
Special head screw ·
40mN·m1
M1.4 x L2
Sensor FPC cover
502
466
Damper
Spring
Quantity
2.
T roller upper
382
flange
T roller Ass'y
457
415
458
394
H
455
T roller inner
384
T roller bottom
383
flange
39
7
Guide adjustment
SPR.
S guide hexagon
428
nut
385
S guide sleeve
Pinch lever Ass'y
Grease
Pinch lever
return SPR.
Tension arm Ass'y
354
456
N
T spring
hanging
ANG
356
K
B
Tu main
brake
375
O
411
415
M
T arm SPR.
H
N
351
392
Tu reel base
Ass'y
411
O
391
Main brake
SPR.
S reel base Ass'y
Main brake SPR.
Fit the main brake SPR from
above, and close with the hook.
F
Swing arm release
lever fixing screw
Swing arm
release lever
L
420
357
390
Swing arm
release SPR.
Tension band
Ass'y
S main brake
391
374
Note 1: Take care for scratch and hit mark on 381, 382 , 383 , 384 and
455 . Handle the tension band with care against deformation.
Note 2: After lightly tightening 428 arm area against deformation,
apply screw-lock on the tip of the shaft.
Item
Tightening torque
Quantity
BCWø1.2-ø3.0-t0.25 1
F S Tight · M1.4 x L2 40mN·m1
HCWø0.7-ø2.2-t0.25 2
Special head screw ·
K
40mN·m1
M1.4 x L2
Special screw with step
L
· 40mN·m1
M1.4 x L1
Type 2 minuteness
M
40mN·m1
M1.4 x L1
NCWø0.7-ø1.8-t0.1 2
OWø1.2-ø2.5-t0.3 2
21
VL-MC500U/K
Grease
(Rear surface,
groove side surface)
470
453
399
398
438
314
A
A
A
F-3
F-4
F-5
F-2
F-1
PB guide SPR.
Drum base Ass'y
Grease
(Front surface, rear surface,
groove side surface)
Tightening torque
50mN·m
Drum Installation screw
Drum fixing SPR
Drum Ass'y
Mechanism fixing angle
9-5-3. Main chassis assembly and slide chassis assembly assembling method
(1)Enter the coupling mode. (In this position, the cam groove of the T arm operation lever in the figure is parallel to the side of the main
chassis, and the poll base is slightly moved.)
(2)Insert the slide chassis side operation pins (
main chassis side, move the slide chassis in the arrow direction, using
into the groove of slide chassis, and install with the 4 screws.
tension arm, 2 Tu guide arm, 3 pinch lever) in the position shown below at the
1
A
to D as guides, insert the loading lever operation pin
1.
C
C
C
B
A
1
D
Item
C
Special screw ·
C
C
2
3
Tightening torque
40mN·m4
Quantity
3.
M1.4 x L1.6
2.
355
Reel cover Ass'y
Oil
FPC cover
377
P
Swing arm Ass'y
N
313
Item
A
Tightening torque
Quantity
A S Tight · M1.4 x L3 40mN·m1
NCWø0.7-ø1.8-t0.1 1
Type 1 minuteness
P
M1.4 x L1
40mN·m1
Item
Tightening torque
Quantity
A S Tight · M1.4 x L3 70mN·m3
F S Tight · M1.4 x L2 70mN·m5
4.
Q
Quantity
Q
Type 2 minuteness
M1.4 x L2
Item
Q
500
Head amplifier PWB unit
501
H/A FPC shield plate
Q
Tightening torque
40mN·m3
22
VL-MC500U/K
GREASE/OIL APPLICATION
Including groove
side surface
(Applied)
Rear surface · groove
side surface
Drum base assembly
Intermediate gear angle
Pinch control lever
Front surface · rear
surface · groove
side surface
Side of the main chassis
(Applied)
Main cam
S loading arm
Enabled after
assembling
Capstan FPC stopper
From rear
surface side
From rear
surface side
Enabled after
assembling
T arm control lever
Loading lever
Tu loading arm
: Oiling(Cosmo Hydro HV22)
O
: Greasing(Moly Coat YM-103)
G
: Greasing(Moly Coat YM-103)
Swing arm
After joining the main chassis
and slide chassis
9-6. Removing the cassette
(1)Apply DC3V to the loading motor unload slightly.
(2)After the tape is slackened, turn the rotor (lower side of mechanism)
of capstan motor to tighten the tape. (Arrow direction, Fig. 1)
(3) Repeat the operations (1) and (2). After the pole base has been
completely unloaded, ascertain that the tape is not loose.
(4)Finally apply again DC3V to the loading motor, so that the cassette
controller ejects.
(5)Take out the cassette.
Note) DC3V is applied to the loading motor as shown Fig 1. Then, the
mechanism moves in the unloading direction.
Enabled after
Brake shifter
assembling
Slide adjustment angle
Side of the slide chassis
Sensor FPC wiring
Loading motor
Minus pole
Plus pole
Pinch lever
: Oiling
O
: Greasing
G
: Greasing
Part A
Capstan motor rotor rotation direction
(from rear side of mechanism)
Sensor FPC
23
Fig. 1
VL-MC500U/K
10. ADJUSTING THE ELECTRICAL CIRCUITS
Before starting the electric circuit adjustment
• The adjustment methods described herein are used, in most cases, when the expendable mechanical parts, including
the video head, have been replaced, at which time the electrical circuits need to be readjusted. Before adjusting the
electrical circuits, make sure that the mechanism works properly (i.e., the mechanism is properly adjusted). Incase of
the occurrence of any problem to the electrical circuits, be sure to use the specified measuring instruments to locate
the area to which the problem is occurring, and then take the necessary action, including repair, replacement or
adjustment, exactly as instructed in the electrical adjustment methods that will follow.
Do not attempt to make adjustments without using the proper measuring instruments.
• This machine is configured so that the electrical circuits inside its PWB unit are composed, for the most part, of highdensity, small surface-mounted component parts for downsized machine body.
To perform repair service or parts replacement, do so using a soldering iron, but in as short a time as possible; this is
because surface-mounted component parts are generally so small in size and susceptible to heat, as compared with
the large discrete parts used in TV sets, desk-top video decks, etc., that attempting to heat their electrodes for a longer
time than is necessary with a soldering iron may result in their becoming defective.
This applies particularly when replacing the laminated chip capacitors.
For this purpose, ceramic soldering irons with a temperature regulator are recommended (iron tip temperature 250°C
and soldering time 5 seconds or shorter).
VL-MC500U/K Specifications of service jigs
No. Connection section Connector REF. No.
1 H/A_PWB—H/A_FPC P306— 80B-B C QCNW-1832TAZZ BV
2 H/A_FPC—Main —SC3301 80B-B CPWBH2876TA01 Product unit use or AS
3 Main—Battery Terminal SC900← 20B-B QTANZA005WJZZ Product unit use AM
4 Main—LCD SC2801—LCD 24 C QCNW-1382TAZZ or BD
5 Main—Inverter PWB SC2802—SC9801 8 C QPWBHB329WJZZ Product unit use or AD
6 Main—CCD PWB P1200—P102 14 QCNW-A490WJZZ Product unit use AH
7 Main—Cam PWB SC1201—SC1001 33 QPWBHB327WJZZ Product unit use AS
8 Main—Card PWB SC1202—SC1503 33 QPWBHB327WJZZ Product unit use AS
9 CCD—Cam PWB SC101—SC1002 27 QPWBHB326WJZZ Product unit use AE
10 Card—Flash Unit SC1502← 12 QPWBHB328WJZZ Product unit use AF
11 CCD—Turn SW Unit P101← 3 QSW-ZA009WJZZ Product unit use AG
12 Card—Li Unit P1504← 2 RUNTKA027WJZZ Product unit use AG
13 CAM—Power/SW Unit SC501← 17 QPWBHB332WJZZ Product unit use AF
14 TP Jig for Envelope SC3302← 10PB-B C RUNTKA003WJZZ BF
confirmation
15 Main—Sperker P600← 2 VSP0020P-A1WN Product unit use AK
16 Cam—Lens SC2501← 20 Direct connection —
17 Inverter—Lamp SC9802—Lamp 4 Direct connection : High tension caution —
No. of pins
New or
Continuation
CPWBH2925TA01 Product unit use AR
QCNW-1274TAZZ AZ
QCNW-1768TAZZ Product unit use(With DC5, use)
QSW-ZA008WJZZ Product unit use AP
QSW-ZA012WJZZ Product unit use AZ
Part cord
Price
code
BF
24
VL-MC500U/K Service jig configuration
TURN SW UNIT
QSW-ZA009WJZZ
13
5
9
8
7
CCD PWB
SC101
LENS FPC
SC1503
SC1502
SC2802
J7401
SC9801
J1401
J5701
SC
3302
CAM PWB
SC1202
SC2801
P1504
SC3301
SC900
HEAD AMP FPC
CPWBH2876TA01
or
CPWBH2925TA01
P306
HEAD AMP UNIT
MECHANISM
JIG FOR ENV. OUTPUT
RUNTKA003WJZZ
LCD PANEL
LAMP
FPC
PANEL FPC
SC9802
INVERTER PWB
MAIN PWB
CARD PWB
SC1501
CARD SOCKET
MIC UNIT
RMiCCA001WJZZ
POWER ZOOM SW
UNIT
QSW-ZA007WJZZ
OPERATION SW
UNIT
QSW-ZA008WJZZ
3
4
2
1
12
QPWBHB326WJZZ
QPWBHB327WJZZ
QPWBHB327WJZZ
QCNW-A490WJZZ
QCNW-1832TAZZ
QCNW-1382TAZZ
or
QCNW-1274TAZZ
LENS UNIT
Direct connection
16
Direct connection
15
SPEAKER
VSP0020P-A1WN
P102
P1200
P6600
QPWBHB329WJZZ
or
QCNW-1768TAZZ
17
BATTERY
TERMINAL UNIT
QTANZA005WJZZ
14
J600
P600
FLASH UNIT
LITHIUM UNIT
RUNTKA027WJZZ
SC1002
SC2501
SC501
P101
SC1001
SC1201
10
QPWBHB328WJZZ
6
11
VL-MC500U/K
25
VL-MC500U/K
[TEST POINT]
(Wiring board diagram: Main Side A)
TL604
P600
TL605
J600
TL1474
PCO D/A-Y
TL1475
PCO D/A-C
J5701
J1401
J7401
SC3302
TL3359
TL1477
TL3354
TL3342
TL3341
TL3338
TL3356
TL3355
TL3353
TL3352
TL3339
R1480
TL3362
TL3351
TL3358
TL3357
TL3360
TL3361
TL3340
TL3350
TL1470
TL1471
TL1474
FL5701
R989
R988
C971
TL1473
R1477
R1471
TL1472
R1472
R1476
TL1476
R1475
R1478
TL1475
R1479
TL900
TL902
TL901
C901
TL1245
TL1216
TL1210
TL1214
L918
TL3326
TL1240
TL1242
TL1206
R1952
C1203
C5701
R5701
C1611
C1617
C1604
C932
C1610
C1605
L1601
Q908
C982
C983
C450
R440
C3462
C451
R442
R443
R441
C452
R446
TL3324
SC3301
TL3313
TL3316
TL1242(INT MIC R)
EE level check
Frequency character check
TL1236
TL1237
R5717 R5716
TL1249
TL1201
TL1247
TL1251
TL1248
TL1246
TL1202
TL1234
C5706
IC5701
R5708 R5709
C5703
C5704
R5705
C5705
D403
R5703
R5704
R5715
R5707
R5706
Q5701
L403
C417
R409
R410
C415
TL407
TL401
Q7402
Q7403
R7402
C7414
R7403
R7413
C7413
C412
R7417
C7404
R7420
C424 R414
D7401
R7423
R7418
R7415 R7416 R7419
R7422
C7403
C7402
D7402
C7405
C7401
C7417
R7424
C413
L7400
C7400
C403
R463
C425
R7401
FB7401
C420
C402
Q7401
C401
R401
D472
R403
R402
C407
R411
C404
R412
C405
R407
R416
TL3321
R3301
TL3319
TL1243
R3721
FL5702
C1603
IC1602
C981
R406
IC405
SC1202
TL1235
TL1209
R5702
C1608
TL3323
TL3317
C1201
C3701
L3701
TL1244
TL1238
R467
FB3701
C5702
FL403
SC1201
TL1263
TL1271
TL1222
TL1269
TL1207
TL1224
TL1262
TL1208
TL1270
TL1223
C3710 C3711 R3737
IC3702
C3708
C3709
D404
R436
R437
C447
R468
C477
C478
TL415
TL414
TL403
TL421
R405
R438
R435
R429
R428
C423
IC452
C419
R418
C418
L471
C473
R477 C435
D471
C2826
TL4429
X401
C472
R478
C474
C2828
C2822
C2827
L2802
L2803
R2856
C2823
R2840
R2804
R2805
C2806
R2801
TL1253
TL418
TL1252
TL1225
TL1227
TL1258
TL1259
TL1266
TL1265
TL1260
TL1257
TL1217
TL1203
TL1256
C3705
TL1267
TL1264
IC3701
C3702
R404
R413
TL4436
TL417
TL416
R462
R471
C411
C414
C430 C457 R415 C432 C462
C421
C410
C475
R431
FB456
R432
C476
R2851
R2852
R2853
TL2824
TL2825
TL2826
SC2801
C2802
R2812
R2802
D2801
D2800
TL2800
R2811
R2814
R2803
C2801
R2818
C2800
TL2801
Q2800
R2815 R2813
RMC701
C1202 C1200
R702 C703
R3716
R3711
R3742
R3710
R3702
C3706
R3713
IC407 IC408
IC2803
R2807
R2819
D2802
C2807
R2821
R2822
C2803
R3714
R3712
R3704
R3715
R3708
R3709
R3703
R3743
FL3702
R3706
R3707
C3704
R3705
C3703
Q3701
C3707
R3717
R3718
R3701
R3719
R3720
C201
R201
TL1204
R1202
P1200
Z0
L2801
R1201
C2805
C456
R2808
L2800
C2808
R2806
C463 C460 C465
IC2800
C2824
C2825
R2825
R2830
C2814
C2816
TL2836
TL2835
C2815
R2820
R2829
Q2801
Q2802
C2809 C2804
C2810
R2823
C2811
C2812
C2813
R2824
TL1216(INT MIC L)
EE level check
Frequency character check
C627
C634
R641
C632
R643
R901
Q2805
TH2800
L600
Q904
Q910
C955
C954
R983
Q909
L907
Q903
C973
L916
Q906
L917
L923
C960
L915
C900 C937
R900
Q9900
CP1
C9900
R9921
R9920
CP2
FB2801
TL2832
Q2806
C2831
R2861
R2862
Q1909
R2863
R1956
TL606
C611
C612
C610
R982
C953
R995
R956
R987
C970
C972
Q907
C975
C974
C990
C991
Q911
C992
R951
R950
C935
L904
R7426
R7427
R7428
R7429
CP3
SC900
TL905
TL906
TL2831
R2860
TL903
TL904
R2857
R2858
C2830
R2859
R600
C641
C642
L601
L911
C956
L912
TL908
C957
R970
R999
C938
C931
Q900
L901
T900
C933
R996
Q905
R990
C980
L900
L919
TL913
C930
C9901
CP4
IC3405
R3495
R3492 R3493
TL3328
TL3327
TL3315
TL3333
TL3314
C1911
TL1908
R1959
R1958
R1957
(Wiring board diagram: Main Side B)
C4481
C1418
C235C240
R4495
R7800
C7814
C4485
R4472
C4482
IC1401
C1416
C1411
TL4437
C4428
R4486
R4471
C230
C238
C738
C714
R727
R726
C715
FB201
C203
FB204
C211
L204
C213
C215
C202
C212
C209
FB203
TL233
TL4424
TL4434
R4414
R4401
TL4440
R4407
C4426
R4454
C4427
IC4401
C7816
C7815
C7817
C7818
Q4481
R4485
C1408
C1410
C1407
C1406
R1423
Q1403
TL7824(G OUT)
DAC full-scale
C237
IC203
C231C228C226
C224C223R209
Z1
C208R235C239C210R205C222
R7835
R7840
R7836
Q7800
C7827
R7837
L7800
R7831
C7802
C7826
C1431
IC201
C7828
C7829
R7833
R254
R253
R251
R252
C205
C204
TL234
R7823
R7824
C7821
C7830
R7825
C7822R7809
R7810R7834
R7838
C7820
IC7801
C7800
C7825C7819R7839
IC7802
R7828
R7830
C7804
C7824
L1431
C1440
C1441
Q1433
R1436
R1437
TL4439
R7820
R7822
D7810
L7810
R7812C7812
C7810R7811R7819
R7832
R7821
TL7820
C7807
C7801
C7809
C7805
C7808
R7829
C7803
TL7825
R7826
TL7823
TL7824
C7806
R7827
C7823
Q1431
C7813
C1438
TL1431
R1442
R1439
R1438
Q1434
IC1431
R1440R1441C1437
C1436
C1409
C1432
R1432
C1439
Q1432
C1433
R1433
C1435
R1434
C1417
R1435
Q1405
R1424
R1404R1403C1419C1434
C1412
R1414R1413R1421R1461R1462R1431
TL2800
COMMON PULSE
TL607
EE level check
R771
R701
C736
D703
TL790
IC707
X701
C733R741
R734R731R733R720
C4461
C707R721
IC4461
R708R755R735R725R737
C4466
R706
FB4461
R710
R4460
R4465
C4465
C705
Q4461
R4462
R4466R4463
C4463
TL4438
R4461
TL4433
C4418
C4417
R4415
C4462
R4453
D4452
C1413
R1419R1402
R4403
L4451
X4451
D4451
C4423
C4451
R4408
TL4428
R1405
TL4405
Q4483
R4451
C4415
C4424
C4420
Q4432
R4436
C4414
C4421
C4413
C4410
C4409
R4404
C4408
C4407
C4419
C4416
TL4426
R4488
R4489
R1422
C1415
C4401
R4494
TL4400
Q4482
R4487
Q1404
IC3404
C1402
L1402
C3458
C3454
C3457
R3452
R3457C3455
L1404
C3451
R3451
R3462
R3469R3471
C3456
IC3403
C3452
R3468
C4454
R4456
L1406
Q1402
Q705
C4403
C4436
R4437
C4402
C1414
R1406
R738R729
IC703
L1405
R3466
R3463C3475
C709
C704
R723
R747
R705
R715
R796R797
R772
R707
C735R712
R724
R736R732
IC701
R730
R782
R711
Q701
C4435
R4435
C4404
C4422
C4405
C4412
C4411
R4402
FL3402
R3412
R3411
C3466
C3411C3465
C3409R3406
R3410
C3414
C3417
C3420
C3419
C3421
R3464
TL3401
C3423
C3481
R3423
TL3403
TL3406
R3465
C3404
R3435
R3436
C3430
IC3406
TH3402
R3480
IC3402
C731
R743R714
R768
TL700
Q702
IC705
Q4470L4404
C4406
C3408R3407
IC3401
C3429
R781
R779
C739
C740
C713
C711
C716
Q703
R740R739
R745R722
R717R728
R742R709
R762
R761
R760
R763
C730
R756
C720
R748
R716
C729
R713
R719
R718
R704
C712
L701
TL914
C721
C706
R1945
R1943R1944
TL1906
TL1907
C1921
C964
FB4405
C4483
L4471
L4406
R3496
Q3406
FL3401
R3489
R3442
Q3401
C3403
R3409
C3443
C3405
C3442
C3406
R3413
R3404
C3413
R3414C3410
C3412
C3478
C3415
R3437
C3471
C3434
R3422
R3424
R3481
C3431
R3432
R3486
R3487
R3428
R3429
R3425
C3474
C3479
R3402
TL3410
C3428
R3427
R3488
R3499
TH3401
C3432
C737
C701
Q1914
C3407
R3415
R3418
R3417
C3416
C3418
C3476
C3477
C3424
C3426
R3421
C3433
R3482
C3444
R754
R750
R749
C724
R766
R765
R764
R767
TL799
R746
X702
R703
R780
R1940
IC4701
R3401
C3402
L3401
R3430
R3416
R3470
C3470
R3420
R3419
R3445
TL607
C722
IC706
C726
C725
R753
R752
R751
C723
C645
R659
R645
C719
R652
R647
C638
R744R651
IC708
IC704
Q1913
C959
TL918
L914
C4703
C4702
R1718
C3401
Q1701
R1717
FL3403
C3467
R3472
Q3404
R3454
C3436
C3473
L3405
L3404
Frequency character check
C728
C631
R639
R603
R648
C640
C636
C639
R646
R656
Q604
Q600
TL608
C702
C727
Q1921
R1912
R1916
D1900
L920
C968
C962
TL917
TL910
C934
R1728
R1727
C1728
R1726
R1719
R1701
R1720
R1721
R1700
R1722
C1722
C1721
R3473
C1723
C1727
R3478R3479
C1726
R1715
R1716
C1725
R1714
R1713
C1724
C1714
C1718
C1717
R1711
R630
C624
R627
C622
R655
C629R625
R629
C635
C637
C620
R636R634
R604R638
C626
IC600
C628
R637
C633
R640
R642
R644
C625
R628
R632
R624
R635
C630
R626
R633
R649
R650
L909
C951
R1911
L908
Q1920
C939
C952
L910
R1941
TL911
R955
D902
D901
TL912
FB901
C967
C963
D900
C965L913
R909
R910
R906
L921
C903
R907
R905
R904
C969
R930
R931
L903
R935R937
C909R936R902
R938C908C902
R939R933R903
R934
C910
C911
C936
C912
C913
L902
C915
R968R940
R941C914
L1702
R913
C1715
C1716
C1713
C1709
R1712
C1719
IC1701
C1720
R1710
C1712
C1710
R1709
R1708
C1708
C619
C621
R631
C623
FB900
Q901
C948
R912
C925
C993
C926
IC900
R943R942
C924C916
R925R947
C1707
C1706
C1704
TL2801(C OUT)
COMMON PULSE
R658
R654
R610
R605
Q601
C644
TL601
FB600
VA602
R623
R601
R613
R661
Q605Q603
R602
C609
C616
R617
R621
R615
R620
C614
R606
C607
R609
C613
R607
R619
R608
R612
C615
R614
R618
R616
C608
C617
R657
R975
C941
R980
R915
R918R919
R914C904R911
R948C917Q902
C1705
R949R946
R1707
R1704
VA600
VA601
C618
TL602
C603
TL603
R660
C643C606
R653
C605
R611
Q602
R622
C946
L905
C949
R973
C945
R977
C943
IC901
C942
R917
R929
C927
R920C905
C906
R962
R953
C923C919
C918
R965
R954
R1703
C1711
C1702
C1701
R1706
R1724
R1705
R1723
R1702
TL5701
R5710
R5711
TL5702
R972
R5712
R974
R979
TL5703
R5713
TL5704
TL1905
C1922
TL1904
Q1908
R1925
Q1911
R1991R1930R1929
C1980
R1990
Q1905
R1914R1913
Q1906
R1999
C1906
R1992
IC1902
Q1932
R927R924
R926C928
R1995
C1981
R1994
R1998
R1996
C907
R1997
R928
R966
C921
R967
R957R958
R959C920
R960C966C922
R952
L1701
C2821
R2835
R2833
C2819
R908
IC2802
R2831
C1703
TL2834
TL2833
VA603
TL600
R1927
R1931
Q1931
C1982
SC2802
L2804
TL2830
TL2829
TL608
EE level check
Frequency character check
26
VL-MC500U/K
[Making adjustments]
Adjusting the servo system controller and related parts
1. Setting the system codes
Replacement of IC705 E2PROM requires the following data to be set in this order.
[Procedure]
Set the unit to the VCR mode and set the data for each address.
Code
Address 01 09 02 0A 03 0B 04 0C 05 0D 07 0F
Data 00 FF 01 FE 1C E3 00 FF 00 FF 02 FD
When replacing the IC705 E2PROM, first make the following settings and then start the adjustments.
(1) Electromagnetic conversion
Address 27 28 2B *105 25 26
Data 40 90 90 80 40 90
* The address uses only when replacing the IC302.
• Adjustment with automatic machine
Mode VCR ADJ mode
Procedure 1) Using the 12 command, set the VCR adjustment mode.
Examples • During E
1. Model code 2. Destination code 3. Specification code 4. Menu selection code 5. Software switching code 6. Calender switching
2
2) Using the 20 command, give the E
PROM write permission.
3) Set the system code with the 22 command for each type.
4) Using the command, set write inhibition.
5) Using the command, cancel the adjustment mode.
2
PROM (IC705) replacement.
• Manual adjustment
Mode VCR ADJ mode
Procedure 1) Set the CAM/OFF/VCR selection switch to VCR.
2) Press “CONTINUE” → ”VCR adjustment” on the remote controller to set the VCR adjustment mode.
(At this time an indication “VCR ADJ” appears at the left lower side.)
Enter a setting corresponding to the address.
<Setting method>
3) Adjust the address by moving up and down the blinking numeral with the FF and REW key, and fix the address
by pressing the PB key.
4) Adjust to the setting by moving up and down the blinking numeral with the FF or REW key, and set data by
pressing the PB key.
5) Press the STOP key to set the address set state.
6) Repeat the operations 3), 4) and 5) as much as input addresses. After completion of input of all items hold
down the “CONTINUE” key to cancel the VCR adjustment mode.
7) Set the CAM/OFF/VCR selection switch to OFF.
2
Examples • During E
PROM (IC705) replacement.
2. HSWP adjustment
Mode VCR ADJ mode
Procedure 1) Play back the alignment tape in the video mode.
2) Press the "CONTINUE" and "HSWP ADJ" keys on the adjustment remote control in this order.
→ This executes the HSWP adjustment.
When the adjustment is successful, the LCD lights up [OK] and the cassette is automatically ejected. If not
properly adjusted, the LCD lights up [NG].
Examples • During mechanism replacement. • During E2PROM replacement (IC302 inside the head amplifier circuit board).
27
VL-MC500U/K
3. SHUT OFF adjustment
Mode VCR ADJ mode
Procedure 1) Load a recordable tape, and set the camera mode.
Press the "CONTINUE" and then the "TEST SEL" on the remote control for adjustment to enter the TEST mode (T-01 blinks).
2)
3) Select T-03 with the FF or REW key and then press the PB key.
4) Observing the power voltage from TL900(-), set it so that TL904(+) obtains 6.00V ± 50mV.
5) Press the "DISPLAY" button on the main unit. Turn off the power and the adjustment is completed.
2
Examples • During microcomputer (IC701) , REGULATOR (IC704) or E
PROM (IC705) replacement.
ADJUSTING THE ELECTROMAGNETIC CONVERSION CIRCUIT SYSTEM
1. PLL VCO adjustment
Mode VCR ADJ mode
Procedure 1) Playback the alignment tape (or a self-recorded tape).
2) Call the adjustment mode (V-ADJ).
3) Set the address "2A" and call the data.
4) Set the called data with the FF/REW key to the point where the playback screen appears.
(At this time, the screen full of block noise is OK.)
Examples • During E2PROM replacement. • During circuit board (Main) replacement.
2. Phase and equalizer adjustment → (Performed in the VCR mode)
Mode VCR ADJ mode
Procedure 1) Load a self-recorded tape into the deck.
2) After playback for 3 minutes, select the test mode 0F using the remote control for adjustment to start the
automatic adjustment. (The following sequence is automatically performed.)
The built-in VI/O
colour bar is recorded.
VS REW
PB
Phase and
equalizer are
adjusted
automatically.
OK:
Blue LCD comes on.
Judgment
NG:
Red LCD comes on.
Tape is EJECT.
3) ON/OFF does a power source.
4) Error rate check
Select and fix the TEST MODE 0B on the adjustment remote control.
5) Manual adjustment method (video adjustment mode)
* Perform this adjustment with the self-recording/playback in the LP mode.
For phase, vary the data for the address 26 and 2B, and for equalizer, vary the data for the address 25 and 27,
to set the error rate is made as small as possible.
Error rate
Synchronization error 20 or less
Error rate 200 or less (SP Mode)
330 or less (LP Mode)
Phase Equalizer
H ch side 2B 27
L ch side 26 25
Synchronization error
H
L
Examples • During mechanism replacement. • During circuit board (Main) replacement. • During E2PROM replacement.
28
ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM
;
;
;
;
y
y
y
y
L907
(Wiring board diagram: Main Side A)
VL-MC500U/K
TL1474
PCO D/A-Y
TL1475
PCO D/A-C
C953
R995
J5701
J1401
TL1477
J7401
SC3302
TL3342
TL3341
TL3339
TL3338
TL3356
R1480
TL3340
TL3362
TL1470
TL1471
TL1474
TL3350
FL5701
R989
R988
C975
C971
TL1473
R1477
C974
R1471
R1472
TL1472
R1476
C990
TL1476
R1475
R1478
C992
R951
R950
TL1475
R1479
C935
R7426
R7427
R7428
R7429
TL900
TL902
TL901
SC900
Q903
R956
R987
C973
C970
C972
Q907
C991
Q911
L904
R901
CP3
TL905
L916
Q906
L917
L923
C960
L915
C900 C937
R900
Q9900
CP1
C9900
R9921
R9920
CP2
L912
TL908
C957
R970
C938
C931
T900
C933
R996
Q905
R990
C980
L900
L919
TL913
C930
C9901
CP4
IC3405
R3492 R3493
TL3328
1. PCO D/A-Y adjustment
Test point TL1474 (connected to oscilloscope) Address VCR ADJ 566
Mode EE mode
Procedure 1) Connect the AVS cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to "566", and call the date.
(100% white signal is output.)
4) Vary the date with the FF and REW keys to set the signal appearing at TL1474 to 1.0Vp-p ± 0.05Vp-p.
Examples • During IC705 replacement. • During IC4401 replacement. • During IC1401 replacement.
1.0±0.05
2. PCO D/A-C adjustment
Test point TL1475 Address VCR ADJ 567
Mode EE mode
Procedure 1) Connect the AVS cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to "567", and call the data.
4) Vary the data with the FF and REW keys to set the signal appearing at TL1475 to 0.64Vp-p ± 0.05Vp-p.
Examples • During IC705 replacement. • During IC4401 replacement. • During IC1401 replacement.
29
;;;;
yyyy
;;;;
yyyy
;;;;
yyyy
;;;;
yyyy
0.64 0.05
VL-MC500U/K
7
C
C2805
0
5
1
4
Q
C4416
ADJUSTING THE LCD CIRCUIT
* To make this adjustment, set the backlight switch to the "NORMAL" position.
(Wiring board diagram: Main Side A)
R463
C425
C420
C419
R418
C418
TL4429
L471
D472
C473
C472
R477
R478
D471
4
R407
C2827
301
C2826
R2856
TL418
X401
C474
C2828
C2822
L2802
L2803
C2823
R2840
R2804
R2805
C2806
R2801
C430
C421
C410
FB456
C475
R431
R432
C476
R2851
R2852
R2853
TL2824
TL2825
TL2826
SC2801
C2802
R2812
R2802
D2801
D2800
TL2800
R2811
R2814
R2803
C2800
TL2801
Q2800
R2815 R2813
TL2800
COMMON PULSE
C2801
R2818
D2802
R2821
IC40
C2824
TL2836
IC2803
R2807
R2819
R2820
Q2801
C2807
R2822
C2803
TL2801(C OUT)
COMMON PULSE
R2829
C463
C2815
R2825
R2830
TL2835
Q2802
C2825
1. DAC full-scale adjustment
C2814
C2816
R280
C2813
R2824
C2812
R2823
C2808
IC2800
R2806
L280
C2809 C2804
C2810
C2811
Adjustment procedure and connecting same as the VCR section.
(Wiring board diagram: Main Side B)
R4401
414
TL4437
TL4440
R4495
R7800
C4428
R4407
TL4439
C4426
R4454
C4427
TL234
IC4401
C7816
C7815
C7814
C7817
C4481
C4485
R4486
Q4481
R4472
R4471
C4482
R4485
C1408
IC1401
C1410
TL7824(G OUT)
DAC full-scale
C7802
C208
C7828
C7829
R7833
R254
R253
R251
R252
C205
C1441
R7830
C1440
C7821
D7810
R7832
R7827
IC1431
C1439
TL7825
TL7824
C1438
R7820
R7812C7812
R7821
TL7820
C7801
C7805
R7829
Q1431
TL1431
Q1432
C7823
C1436
C1432
R1432
R7822
L7810
R7826
C7806
R1440R1441C1437
R1442
C7807
C7809
C7808
C7803
TL7823
R1439
C204
C7810R7811R7819
C7813
R1438
Q1434
C1409
R1431
R
R7835
R7823
R7840
R7824
R7836
C7830
Q7800
R7825
C7822R7809
R7810R7834
R7838
C7820
C7827
R7837
IC7801
C7800
L7800
C7825C7819R7839
IC7802
R7831
R7828
C7804
C7826
C7824
L1431
C1431
C7818
C1413
D4452
C4454
R4456
L1406
Q1402
R4408
TL4428
R1405
L4451
X4451
C4419
TL4405
TL4426
Q4483
R4488
R4489
R1422
Q1404
C1402
Test point TL7824(G OUT)
Address VCR ADJ 5DF(G)
Mode VCR AV input
Procedure 1) Set the data of the addresses 582/585/59A/5E1 to FF/80/77/00, respectively. (At this time, the LCD is not
displayed.)
2) Set the data of the addresses 595/5D0/5D3 to 00/80/48, respectively.
3) Connect a digital voltmeter to TL7824(G_OUT) to measure the DC voltage.
* The voltage value at this time is regarded as (DA_VG).
4) Set the data of the addresses 595/5D0 to 80/00, respectively.
5) Adjust the DC voltage to the adjustment standard value at the address 5DF.
6) Preset the same data as the address 5DF to 5DE/5E0.
7) Restore the data of the addresses 582/585/595/59A/5D0/5D3/5E1. (Initial values: 40/C5/28/7F/28/40/71)
Adjustment DA_VG+0.55V ± 10mV
rating
Examples • During IC705 replacement. • During VIO ENG (IC4401) replacement.
2. COMMON PULSE adjustment
Test point TL2801(C OUT) Address VCR ADJ 32(C)
Mode VCR AV input
Procedure 1) Connect TL2800 to GND.
2) With VCR ADJ 32, adjust the output voltage of TL2801 and the DC voltage value of the digital voltmeter to the
specified adjustment values.
Adjustment 7.05V ± 50mV
rating
Examples • During IC705 replacement.
3. COM-BIAS adjustment
Test point LCD panel display surface Address VCR ADJ 33
Mode VCR AV input
Procedure 1) Input the white 100% signal to AV input.
2) Set up the illuminance meter (TOPCON IM-3) on the LCD panel surface. (The outside light must not enter.)
3) Minimize the ripple of the output waveform of the illuminance meter.
Adjustment Minimum
rating
Remark Make this adjustment after 5-minute or longer aging.
Examples • During LCD Panel replacement. • During IC705 replacement.
Response time : 0.6sec
30
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