SHARP VL-SD20U Service Manual
VL-SDPOU
SHARI=
SERVICE MANUAL
LIQUID CRYSTAL DIGITAL CAMCORDER
MODEL VL-SD20U
In the interests of user-safety (Required by safety regula-
countries) the set should be restored
some
in
tions
original condition and only parts
be used.
/-
1 . IMPORTANT SERVICE NOTES.. .................................................................................................... l-l
2. SPECIFICATIONS
3. PART NAMES.. ................................................................................................................................ 3-l
4. DISASSEMBLY OF THE SET
5. MECHANISM ADJUSTMENT JIGS AND PARTS
6. INSPECTION AND MAINTENANCE
ITEMS AND INTERVALS
7. MECHANICAL ADJUSTMENTS AND CHECKS
8. TAPE RUNNING ADJUSTMENT
9. MECHANICAL SECTION ASSEMBLY AND PARTS REPLACEMENT
(DISASSEMBLY AND REASSENBLY).
lO.ADJUSTING THE ELECTRICAL CIRCUITS
11 .USEFUL TIPS ................................................................................................................................ 1 l-l
12.SIGNAL FLOW DIAGRAMS .......................................................................................................... 12-1
13.BLOCK DIAGRAMS ...................................................................................................................... 13-l
14SCHEMATIC DIAGRAMS
15SEMICONDUCTOR LEAD IDENTIFICATION
1 G-PRINTED WIRING BOARD ASSEMBLIES
17.REPLACEMENT PARTS LIST
18.PACKlNG OF THE SET.. ............................................................................................................... 18-l
........................................................................................................................... 2-1
........................................................................................................
............................................................................................................... .6-l
..................................................................................................... 8-l
..............................................................................................................
.......................................................................................................
CONTENTS
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............................................................................
.........................................................................................
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...............................................................................
...................................................................................
identical to those specified
S79K7VL-SD20U
NTSC
its
to
Page ’
.4-l
.5-l
.7-l
.9-l
10-l
14-1
15-1
16-1
17-1
J
SHARP CORPORATlON
This document has been published to be used for
after sates service only.
The contents are subject to change without notice.
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 1.5k ohm, IO watt
resistor paralleled by a 0.15uF 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 ex-
posed 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.
0.15 pF
TEST PROBE
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
1. NOTES DE SERVICE IMPORTANTES
AVANT DE RENDRE LE MAGNETOSCOPE
Avant de rendre le magnetoscope a I’utilisateur, effectuer
les verifications de securite suivantes.
1. Verifier toutes les gaines de fil pour 6tre sirr que les fils
ne sont pas pin&s ou que le materiel n’est pas coin&
entre le chassis et les autres pieces metalliques dans le
magnetoscope.
2. Verifier tous les dispositifs de protection tels que les
boutons decommande non metalliques, les materiaux
d’isolement, le dos du coffret, les couvercles de
compartiment et ajustement ou les boucliers, les
reseaux de resistance / condensateur d’isolement,
les isolateurs mecaniques, etc.
3. Pouretresfirqu’il n’yaaucun risquedechocelectrique,
verifier le courant de fuite de la maniere suivante.
Brancher lecordon d’alimentation secteurdirectement
dans une prise de courant de 120 volts. (Ne pas
utiliser de transformateur d’isolement pour cet essai).
Utiliser deux fils a pinces et connecter une resistance
de 10 watts I,5 kohm en parallele avec un
condensateur de 0,15 uF en serie avec des pieces du
coffret metallique exposees et une masse de terre
connue telle qu’un tuyau ou un conduit d’eau.
Utiliser un VTVM ou VOM avec une sensibilite de
1000 ohms par volt ou plus ou mesurer la chute de
tension CA entre la resistance (voir diagramme).
Deposer la connexion de la resistance a toutes les
pieces metalliques exposees ayant un parcours de
retour au chassis (connexions d’antenne, coffret
metallique, tetesdevis, boutonsetarbresdecommande,
etc.) et mesurer lachutede tension CAentre la resistance.
lnverserlaficheCA(uneficheintem+diairenonpolarisee
doitgtreutiliseeBseulefindefairecesverifications.)sur
I’appareil et repeter les mesures de tension CA pour
chaque piece metallique exposee. Toute lecture de
0,45 V rms (ceci correspond a 0,3 mA rms CA) ou plus
est excessive et signale un danger de choc qui doit etre
corrige avant de rendre le magnetoscope a son
utilisateur.
VTVM
r-oECHELLE CA *-
’ .TGMS
SONDE D’ESSAI
CONNECTER A
METALLIQUES
EXPOSEES
UNE MASSE DE
TERRE CONNUE
l-l
WARNING :TO REDUCETHE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO WET LOCATIONS.
CAUTION
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK. DO NOT REMOVE COVER. NO
USERSERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
This symbol warns the user of uninsulated
voltage within the unit that can cause danger-
A
I
0
n
ous electric shocks.
This symbol alerts the user that there are
important operating and maintenance instructions in the literature accompanying this unit.
This symbol mark means following.
For continued protection against fire hazard, replace only with same type fuse.
(CP1; 1.2A 72V, CP2; 1.2A 72V)
This symbol mark means following.
“RISK OF FIREREPLACE FUSE AS MARKED.”
(Fl 01; 2A 250V)
Ca!xder
AC 2:layPter
A
VL-SDSOU
ATTENTION: POUR REDUIRE LES RESQUES D’INCENDIE OU DE CHOC ELECTRIQUE,
NE PAS EXPOSER CET APPAREIL A LA PLUIE OU A L’HUMIDITE.
RISQUE DE CHOC ELECTRIQUE
ATTENTION: AFIN DE REDUIRE LES RISQUES DE
Ce symbole signale a I’utilisateur la presence
dune tension non isolee a I’interieur de I’appareil
A
I
0
n
qui peut etre la cause de secousses dlectriques suivante.
dangereuses.
Ce symbole aver-tit I’utilisateur que des in- (FlOl ; 2A 250V)
structions importantes relatives B I’utilisation
et Bl’entretien se trouvent dans le manuel
accompagnant I’appareil.
NE PAS OUVRIR
CHOC ELECTRIQUE, NE PAS RETIRER LE
COUVERCLE, AUCUN ORGANE INTERNE
NE PEUT ETRE REPARE PAR
L’UTIUSATEUR, CONFIER L’APPAREIL A
UN DEPANNEUR QUALIFIE.
n
I
.
ATTENTION
Ce symbole signifie que I’on devra uti- Camcorder
liser un fusible de meme type (CPl ; 1,2A seulement
72V, CP2; 1,2A 72V) pour assurer la
securite.
La signification de ce symbole est la
“RISQUE D’ INCENDIE - REMPLACEZ
LE FUSIBLE SELON L’ INDICATION.”
1-2
A CAUTION
BEFORE BATTERY DESTROY
W 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 RBRCW Seal
SHARP participates in the RBRCTM* Nickel-Cadmium Battery Recycling Program in the United
States. The RBRCTM Seal on our battery pack contained in our product indicates that SHARP is
voluntarily participating in an industry program to collect and recycle these batteries. The RBRCTM
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.
q NICKEL-METAL HYDRIDE BAlTERY
q LITHIUM or LITHIUM-ION BATTERY
n SEALEDLEADBAlTERY
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.
1-3
2. SPECIFICATIONS
Signal System:
Recording System:
Cassette:
Recording/Playback Time:
Tape Speed:
Pickup Device:
Lens:
Lens Filter Diameter:
Monitor:
Microphone:
Color Temperature Compensation:
Minimum Illumination:
Video Output Level:
Audio Output Level:
Speaker Output:
External Microphone Input:
Power Requirement:
Power Consumption:
Operating Temperature:
Operating Humidity:
Storage Temperature:
Dimensions (approx.):
Weight (approx.):
NTSC standard
2 rotary heads, helical scanning system
Digital VCR Mini DV video cassette
90 minutes (DVMGO, LP mode)
SP mode: 18.812 mm/second
LP mode: 12.555 mm/second
l/s” (8.5 mm, effective size: 6.0 mm) CCD image sensor (with approx.
660,000 pixels including optical black)
10 x optical/l 00 x digital power zoom lens (F1.8-2.8, f=4.5-45 mm), full-range
auto focus
30 mm
3” (7.5 cm) full-color LCD screen (TFT active matrix)
Electret stereo microphone
Auto white balance with white balance lock
2 lux (13 lux measured by EIA standard)(with gain-up, F1.8)
1 .O Vp-p 75-ohm unbalanced
- 8 dBs, impedance less than 2.2 kohms
300 mW
3.5 mm diameter mini-plug, -66 dBs, output impedance
6.8 kohms, DC 4.0 V, for plug-in-power microphone use
DC 7.4V
4.7 W (during camera recording in full auto mode with zoom motor off and
backlight in normal mode)
0°C to +4O”C (35°F to 104°F)
30% to 80%
- 20°C to +6O”C (-4°F to 140°F)
6 7/32” (W) X 3 ‘18” (H) X 2 2Q/32” (D)
[158 mm (W) x 98 mm (H) x 74 mm (D)]
1.21 Ibs (550 g) (without battery pack, lithium battery and video cassette and lens
Adapter/Battery UADP-0303TAZZ
AC
(VL-SD20UNT)
Adapter/Battery UADP-0304TAZZ
AC
(VL-SD20UAAJW)
Power Requirement:
DC Output:
Power Consumption:
Dimensions (approx.):
Weight (approx.):
AC 1 lo-240 V, 50160 Hz
9.0 v
15w
2 ‘l/,6” (W) x 1
[68 mm (W) x 37 mm (H) x 137 mm (D)]
0.73 Ibs (330 g)
Battery Pack BT-L241
DC Output:
Dimensions (approx.):
Weight (approx.):
Specifications are subject to change without notice.
7.4v
1 ‘/,6” (w) X 1 “/,ij” (H) X 2 l/8” (D)
[4O mm (W) x 43 mm (H) x 54 mm (D)]
0.21 Ibs (97 g)
15/32” (H) X 5 13/32” (D)
1 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 (l-800-237-4277) or visit SHARP’s web site (http://
www.sharp-usa.com).
2-1
VL-SDSOU
3. PART NAMES
For details on the use of each control.
RECord START/STOP bulton
Power Zoom Wide anqle/
Jack cover 1
When the cassette compartment door is open
Cassette holder
1
Cassette compartment door
Cassette compartment
door release
Warning Indicators
MICrophone
jack
AUDIO/VIDEO
jack
ILIthnrm battery
holder
PC CONNECTion
Terminal cover
S-VIDEO socket
Operation buttons
DC IN lack
J
Remote sensor
When the lens section is rotated
DV InDut/output
Pdwer switch (CAMERA/VCR
select switch)
CHARGE Indicator
Battery compartment door
SNAPshot button
Shoulder strap
loop
Hand strap
EJECT THE
CASSETTE. CASSETTE. removed
/ DEW ( -+‘+ /
I Q
INSERT
A CASSETTE.
CASSETTE NOT
RECORDABLE.
THE TAPE
ENDS SOON.
CHANGE THE
CASSETTE.
LAMP
:. lndlcates a flashing d,?.play
M0t.z
EJECT THE
-;*-
1 -?#- 1 cleaned
_bkbiihi ‘iii_
, I , I 1 I’, s _ \ record,ng
~j+E’ kid-
/ I , I
TAPE END
LAMP
The video cassette IS defective and should be
Dew has fwmed wwde the VIEWCAM Wait for a
lew hours until the dew disappears
Abwl 10 seco”ds atrer th,s warn,ng appears. the
VIEWCAM automatically f”r”s 0”
The battery IS almost depleted Replace 11 wLh a
fully charged battery pack
The video heads are clogged and should be
There IS no video cassette I” the VIEWCAM Inserf a
cassette
The era?.ure protect tab on the video cassette has
been slid to the record-protect pos~ton. preventing
The tape IS about to end Prepare a new cassefte
The tape has reached the end Replace I, w,,h a
new cassette
The fluorescent lamp behlnd the LCD monitor IS
close to the end of 1,s serwce lkle Call your local
autlwrlzed Sharp dealer to have It replaced
In Self Recording mode. all warnings wll be
lndlcated by @ dlsplayed I” the center of the
monitor To check the type 01 warning, rotate the
momtor back to the normal posltlo”
Batterv comoartment door release
I
3-1
4. DISASSEMBLY OFTHE SET
Note:
Before removing the cabinet, turn off the power supply, and ascertain that the battery have been removed.
VL-SD2OU
Remove the screws ((u)LX-HZ0050TAFN)(lpc.) and
((e)XiPSF17PO4000)( 1 PC.) fixed the camera back cabinet.
>
_.
P)
Remove the screws ((p)LX-BZO224TAFN)(2pcs.) fixed the
camera front cabinet.
3.
. Remove the screws ((e)XiPSF17PO4000)(2pcs.) fixed the lens
fitting and remove the lens unit.
6.
. Remove the screws ((a)XiPSF17P02000)(1pc.) fixed the cam-
era side cover and remove the camera side cover.
7.
(e)
Remove the screws ((u)LX-HZ0050TAFN)(lpc.) and
((e)XiPSF17P04000)(1pc.) fixed the camera side cover.
. .
(P)
Remove the screws ((p)LX-BZ0224TAFN)(lpc.) fixed the
camera back cabinet.
(e)
. Remove the screws ((e)XiPSF17P04000)(5pcs.) fixed the
bottom cover.
8.
(f)
Remove the screws ((f)XiPSN17PO4000)(2pcs.) fixed the
LCD cabinet.
4-1
VL-SD20U
9.
(m)
Tumthetiltandremovethestayscrew ((m)LX-HZ0064TAFN)(lpc.).
10.
Remove the screws ((t)LX-HZ0050TAFF)(2pcs.)fixed the PWB.
Remove the screws ((e)XiPSF17P04000)(lpc.) fixed the tilt.
Remove the screws ((e)XiPSF17P04000)(1pc.) and ((t)LXHZ0050TAFF)(lpc.) fixed the VCR side cover.
Remove the screws ((t)LX-HZ0050TAFF)(2pcs.) fixed the LCD.
Removethescrew((b)XiPSN17P02000)(1pc.)fixedtheinverter.
12.
15.
* (0
\
Remove
16.
the screws ((t)LX-HZOO50TAFF)(2pcs.) fixed the tilt.
Y
w Gf
Remove the screws ((w)LX-HZOOSSTAFF)(3pcs.) and ((n)LXHZ0077TAFD)(l PC.) fixed the mechanism.
b(n)
DV terminal PWB
Remove the screws ((e)XiPSFi 7PO4000)(2pcs.) and ((t)LXHZ0050TAFF)(2pcs.) fixed the LCD fixing angle.
Remove the screw ((t)LX-HZ0050TAFF)(lpc.) fixed the DV
terminal PWB.
<Screws>
a 1 XiPSF17PO2000 ) M1.7~2 Black
4-2
VL-SDPOU
5. MECHANISM ADJUSTMENT JIGS AND PARTS
5-l. Mechanism check adjustment jigs
. PB-use cassette
Torque meter
!. 9DASD-1015
I. DB
SD-1015
. Torque screwdriver
15OmN.m (15kgcm)
I. JiGTD1500RTDH
;. CB
I. Torque gauge I. Torque gauge head
?. JiGTG0045 !. 9EQTGH-DH5000
3. CN 3. BW
’ For use in VS-REW wind-
ing torque measurement.
Master plane
!: SEQMP-VLPDl
I. CL
For checking reel base
For use with the above
torque gauge.
I. Height adjustment jig
!. SDAHG-PDI
). BZ
For height adjusting.
height.
<Note: The entries of list>
Tension gauge 4N
‘(400gf)
!. JiGSG0400
1. BK
For measurement of
pinch roller pressure.
Height adjustment
screwdriver
I. SEQDRiVER-DH5
1. BC
For guide roller adjustment.
Configuration
1. Name
2. Pan No.
3. Code
l Model, Uses Remarks
1. Dial tension gauge
2. SDAPTG-1 O-l OW
3. CA
l PTG-10
l For Tu guide adjustment.
l For T roller adjustment.
’ Bit shape (see figure below).
Tolerance k 0.1
:Miscellaneous>
1) Slide caliper
2) Precision screwdrivers
. Alignment tape - ( 1 )
. VR3-GAZXS
. CF
Fortape running adjust-
ment.
I. Alignment tape - ( II )
!. VR3-GTZQS
I. CG
For SW point adjustment.
SOADVC-TAPE can use,
too. ICode CU)
. For hexagon nut oppo#ite side 3mm bit.
!. LX-NZO102GEFW
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 HV22/100
2. HV22 : 9EQ-Oil-HV22
3. HV22 : AE
l Cosmo Petroleum K.K.
1. Cleaning paper
2. JiGDUSPER
3. AP
l DUSPER C (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 0.21 N(21 gf) on the upper side reel hub.
1. Grease: Moly Coat
YM-103
2.99FGREASE-YM103
* Dow coaning
1. Screw lock (14018)
l Three Bond
Fig. 1
1. Cleaning liquid:
industrial-use ethyl alcohol
l Commerciallv avaitable item
1. Extremely thin cotton swab
l Commercially available item
String
String
(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.
5-l
r\
Fig. 2
VL-SDPOU
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
0 l l l Replace. 0. l l Clean. A* l l Lubricate. ** l l Check.
l Head hole clogging
specially the lower drum helical
l The tape becomes slack.
l Block-type noise
l Abnormal noise
Replace the drum a&y if the
video head is cleaned but the
envelope is not still appeared.
(When the envelope is normal,
refer to “11. USEFUL TIPS”.)
[Oil] Cosmo Hydro HV22, HVl 00 [Screw lock] Three Bond 1401 B
[Grease] Moly Coat YM-103
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) To operate the mechanical section alone, remove the FPC of loading motor
from the connector (section B in the Fig. 2), and apply voltage to the loading
motor to drive it. The voltage between terminals must be DC3V or less.
(Forcing the gears to turn by hand entails danger of breakage.)
(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.
l The tape becomes slack.
l The play-back image is
[Cleaning liquid] industrial-use ethyl alcohol
perform within the standard.
Fig. 1
6-1
VL-SDPOU
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 Illfor mechanism adjustments and checks.
AC adapter used, with cassette controller assembly
AC adapter used, without cassette controller assembly (Independent Mechanism) [
DCBV, without cassette controller assembly (Independent Mechanism) 1
(2) When performing checks with a DCBV power supply and independent mechanism, disconnect the loading motor FPC from the
connector.
(3) Always run the tape with the cassette controller assembly attached.
7-1. Checking the playback (recording) winding torque 1 AC adapter used, with cassette controller assembly 1
(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 f 0.35mN.m (7.0 f 3.5gfcm),
ripple 0.2mN.m (2gfcm) or less
7-2. Checking the rewinding playback (VS-REW) winding torque
1 AC adapter used, without cassette controller assembly (Independent Mechanism) 1
(1) Remove the cassette controller assembly, press the DOWN switch, using the
adhesive tape and referring to 9-3, operate in the TEST mode (TOl) 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 (16 + Ggfcm), ripple 0.4mN.m (4gfcm) 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
(1) Remove the cassette controller assembly (refer to 9-2).
(2) Referring to 9-1, apply DCBV 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
Fig. 2
/ MC contacts
Fig. 3
7-1
VL-SDPOU
7-4. Back tension torque check and adjustment in record (playback) mode
1 AC adapter used, with cassette controller assembly 1
(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 f 0.lmN.m (7 f lgcm)
(2) Adjustment (Fig. 4)
If the value is out of standard range, adjust, using the screw I 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: 0.04Nm (0.4kgcm)
Fig. 4. Check (tape exists)
Tension roller position (S guide standard)
0 lt 0.3
J
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 @ direction. If the tension roller is outside, shift
the tension band holder in the arrow @ direction, and fix with the screw 3.
(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.
7-6. Checking of supply S reel base no-load torque
DCSV, 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-l).
(2) Move the swing arm toward the Tu reel base side.
Be careful not to prevent damage to the gears and other parts all this while. (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.)
20mN or less (2.0gf or less)
Tension roller position (S guide standard)
,- ,Sguide
Fig. 5. Position adjustment
(tape does not exist)
7-7. Checking of loading back tension
1 DC3V, without cassette controller assembly (Independent Mechanism) 1
(1) Remove the cassette controller assembly, then apply DC3V to the loading
motor and put the system into L. start mode.
(refer to 9-l)
Move the swing arm toward the S reel base side. Be careful not to prevent
(2)
damage to the gears and other parts all this while. (Fig. 7)
~ , Set a back tension measurement reel hub on the Tu reel base.
(3)
(4) Using a dial tension gauge, pull the string in the A direction, then confirm that
the tension is within the standard.
7-2
[i A
j ;fi&?::i ~
B
Fig. 6. S reel base no-load torque
measurement method
4tEW back tension standard>
(If the tension fluctuates, read its center value.)
15?:~mN(1.5+~.~gf)
7-8. Checking of winding Tu reel base ratchet torque
1 DC3V, without cassette controller assembly (independent Mechanism) 1
(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 prevent damage to the gears and other parts all this while.
(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.)
90mN or less (9gf or less )
7-9. Checking of rewinding playback (VS-REW) back
tension
1 DC3V, without cassette controller assembly (Independent Mechanism) 1
(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-l)
(2) Move the swing arm toward the S reel base side.
Be careful not to prevent damage to the gears and other parts all this while.
(3) Set a torque gauge on the Tu reel base.
(4) Turning the torque gauge to counterclockwise (1 turn for 3 seconds), then
confarm 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 f 0.35mN.m (7.0 f 3.5gf.cm)
VL-SDSOU
Fig. 7. Loading back tension measurement
method
7-lO.Checking of pinch pressing force
1 DCSV, without cassette controller assembly (Independent Mechanism) ]
(l)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 axis.
(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 axis.
(4) Gradually return the pinch roller, and when the pinch roller contacts parallel
the capstan axis, read the value (see Fig. 10) to make sure that the value
conforms to the standard shown below.
<Standard>
1.8 f 0.3N (180 f 30gf)
<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-
D
D D
Fig. 8. Winding Tu reel base ratchet torque
measurement method
Fig. 9
OK
NG
Fig. 10
7-3
VL-SDPOU
8. TAPE RUNNING ADJUSTMENT
8-l. Adjustment locations
<Replacement parts other
than those shown above>
_
Adjust the height of only
replaced parts with the
adjusting jig.
Adjustment procedure 8-2
_
Running adjustment preparation
Adjustment
procedure 8-3
Running rough
adjustment
Adjustment
procedure 8-4 procedure 8-5
Cassette controller
installation
Running final
adjustment
Adjustment
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.)
, T roller
Lower edge
fitting
Height setting
jig
8-3. Preparation for tape running adjustment
Meters, jig.. .
<Method and description>
(1) Remove the cassette controller assembly.
(2) Clean the tape running surface (especially, adequately clean
the drum surface and the lower drum helicam surface).
(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 into
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 -l/4 shift, check whether all of it is flat. If it is not, perform
the following adjustment so that it becomes flat.
Oscilloscope, Adjustment remote control, Height adjustment screw driver, Alignment tape (for tape running
adjustment, for switch point adjustment), Master plane, Height adjustment jig.
, the shift will change;l+l/4
Fit height the par on low edge fitting.
After setting adjustment jigs, turn T roller
-
Sup guide roller
Tension roller
and S guide counterclockwise to 225”.
\ \ Drym 1
S
Master plane
n
Tu guide roller
Tu/guide
8-1
VL-SDPOU
8-4. Running rough adjustment
(Since this adjustment is performed without cassette controller, put a proper weight so that the cassette does not rise , and make an
adjustment.)
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 f l/4 shift, then, as in the above case, adjust until the
envelope becomes flat.
l If running is difficult for the entrance changed, turn the T roller
to counter clockwise 180”. (refer to Fig. 1)
2) Check of VlSR 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.
V
rum to 180”
T roller
Fig. 1
Adjust so that A _; B.
3) Check of tape wrinkles
<Method and description>
Pinch roller
(1) Check that the tape is not distorted between the Tu guide and
pinch in the PB mode and the V/SR mode.
3lf crease is found, make an adjustment in the range of _+180”.
*After adjustment apply Screw Lock.
I) Check the rising time of the envelope wave form 1
(Method and description>
1) Check the rising time of the envelope when switching from V/SR mode to PB mode. (Within 5 set)
12) Check the rising time of the envelope when switching from STOP mode to PB mode. (Within 5 set)
8-5. Final running adjustment
(Perform adjustment without removing the cassette controller.)
1) Adjustment of Sup and Tu guide roller height
<Method and description>
(1) Perform +_ l/4 shift, then if thire 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.
Fig. 2
Deformation
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.
8-2
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.
2. When reassembling, be careful not to allow screws, washers or foreign matter to enter. They can cause mechanical misoperation.
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/HVlOO Screw lock: Three Bond :14OlB
Grease: Dow Corning : Moly Coat YM-103
4. Turn the mechanical section over, do not place it on, for example, a desk. Deformation and scratching of mechanical parts can
cause trouble.
9-1. On the mechanical modes
To operate the mechanism, apply DC3-4V to the loading motor.
At this time, disconnect the loading motor FPC from the connector.
Cleaning liquid: Industrial-use ethyl alcohol
[I) EJECT mode
The mechanism position to take out the cassette where the
EJECT lever is extremely shifted in the A direction. (It is impos
sible to lock the cassette controller assembly in this mode.)
EJECT lever
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 clockwise rotated position (position where
the cassette controller assembly can be locked).
EJECT lever
I \
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 axis, the brake shifter VSR brake
section engages with the Tu reel base gear.
Capstan shaft
S reel base
S main brake
\
Brake shifter
LOADING START mode dianram
Tu reel base
\
Tu main brake
REWINDING (VSR) mode diagram
15) PLAYBACK (RECORD, FF, VSF) mode
The mechanism
feed
playback.
The
pinch
main
brake is
Tu main brake
(Not
visible)
position for playback,
roller
is
pressed to the capstan axis,
separated
I
PLAYBACK mode
from
the
Pinch
S/Tu
roller
diagram
(RECORD, FF, VSF)
record,
and
reel
base.
CaDstan shaft
FF
and
the SITU
(6) STOP
fast
_
Tu
mode
The system is in the STOP (Ret
position; the S
base, the
brake
is in contact
/
reel
base
and
the T pole
S
brake is in contact with
with
the Tu reel
Tu main
brake
bases are snap-fitted to the drum
Lock
in CAMERA mode)
the S
reel base, and the
base.
Tu
STOP mode diagram
9-2. Cassette
controller assembly
<Removing>
(1) Remove the
CAP FPC cover. (Remove the Head amplifier PWB unit and
tighten screw together.)
(2) Apply DCBV to the loading motor to set the standby mode. Press the lock
lever in the arrow direction to move
up the cassette controller. (See Fig. 1,
direction @ or 0)
(When the lever is pressed in the direction 8, gently raise the cassette
controller to release.)
(3) Remove the screws
0 and @ shown in Fig. 2 and Fig. 3, and remove the
Down guide 0.
(4) Remove the screws
side
plate @ in the direction K
Note) When removing the cassette controller, take
@, 0, 0, and @I shown in Fig. 2, 3 and 4, raise
to remove it.
care so that the drum motor
the
FPC provided between the side plate @ and the top cover @ is not
damaged and so that the drum is not damaged.
<Installing>
(1) Apply DC3V
to
the loading motor to set the standby mode.
(2) Install the side plate 0.
1) Lower the cassette controller assembly in
the direction contrary to K in Fig. 4,
and fit the screws @ and @ as shown in Fig. 4.
Tightening torque 40 f 4mN.m (0.4 + 0.04kgcm).
Before fitting the screws @ and @j) make sure that the side plate positioning
section 0 engages with the down switch angle in Fig. 2.
Note) When lowering the cassette controller assembly in the direction contrary
to K, place the drum motor FPC between the side plate 0 and the top
cover 0. At this time be careful so that FPC is not damaged. Take care
so that the drum is not damaged.
2) In Fig. 2 fit the screws 0.
Tightening torque 40 + 4mN.m (0.4 + 0.04kgcm)
3) In Fig. 3 fit the screw 0.
Tightening torque 40 f 4mN.m (0.4 f 0.04kgcm)
(3) Install the down guide 0.
1) In Fig. 2 and Fig. 3 engage the slide chassis down guide positioning sections
@ and 0 with the down guide, install with the screws 0 and 0.
Tightening torque 40 f 4mN.m (0.4 f 0.04kgcm)
(4) Attach the CAP FPC cover.
1) Attach the Head amplifier PWB unit and tighten screw together.
Tightening torque 40 + 4mN.m (0.4 + 0.04kgcm)
AFig.
0 Down guide positioning
@/Down
Fig. 1.
switch
Lock
angle
Fig.
2
Slide chassis
Fig. 3
@Top
lever
Lock lever
Slide
ChasslS
cover
\
@J Down guide
posltlcfllng
9-2
Fig. 4. (Fig. from direction A)
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 DC3V to the loading motor to set the EJECT mode.
(2) Remove the down switch angle.
1) In Fig. 5 remove the screws @ and @.
Note) The loading motor solder joint (part T, Fig. 5) of DEW sensor
FPC applied to the down switch angle is not removed. After the
down switch angle is removed, take care so that the DEW
sensor FPC is not broken.
(3) Surely secure the moving piece @ of down switch as shown in Fig.
6 with the aid of adhesive tape so that the switch is turned on.
(4) Install the down switch angle.
Note) To set the REC mode, press the pin of recognition switch @ (not
required in other modes).
(5) Set the test mode (T-01) with the adjustment remote controller
without loading the tape. Thereby the mechanism operation is
enabled with the mode key.
(6) To eject, remove the tape (3).
9-4. Phase matching
For the parts listed below, match the phases as shown in Fig. 7.
(1) AHC cam (2) MODE switch (3) Main cam (4) Sub cam
Note)
Before disassembling, check the marker positions carefully.
Note)
When installing the engagement gear, make sure that the main cam
and sub cam phase matching hole aligns with the chassis hole.
Note)
After phase matching, turn the MODE switch by hand and confirm
that it turns almost one complete turn. (After checking, return it to
its original position.)
Phase matching hole
(for chassis)
Phase matching
mark
MODE switch
Phase matching
mark
Fig. 5. STANDBY mode
iv9 tape
Fig. 6
@ Down switch moving
piece
Main cam /
Phase matching hole
(for chassis)
Coupling gear
Fig. 7
9-3
Sib cam
I
t
Phase matching hole
(for chassis)
9-5. Reassembly
9-5-l. 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 Fig. 1, 2).
VL-SD20U
1.
(1) Pinch control lever
>
_. (2) Mechanism fixing angle
assembly (Rear surface) B-4
Groove grease
I
/Ai! I
(2) Pinch drive lever
Main chassis assembly
Note) The numbers following
A and B indicate the
screw tightening order
I
(2) Shifterdrive
lever assembly
(2) Center pulley asse
(5) Capstan
,,‘m q
ID 19Specl
ial screw
Ml .4 x L1.6
motor@
MeXnism fixing anale
40mN.m
@@@
(4) Intermediate gear angle
sub assembly
(1) Intermediate pulley
, 1
1 4
2) Lock lever guid
Positioning h;e
n chassis
Item
A @ S Tight Ml.4 x L3 70mN.m 3
B @ S Tight Ml.4 x L2 70mN.m
Item
9 S Tight. Ml.4 x L2 1 70mN.m 1
assembly
TgMening torque Quantity
AHC control lever
ImgMeNng torque 1 Quantity
6
Item
B 1’9 S Tight. Ml.4 x L2 I 70mN.m I
Item
1
E Q Special screw
M1.4xL1.5
ITtthteNng toqus 1 Quantity
1
eck
Guide rail sub assembly
(Rear surface)
TghteNrg torque Quantity
40mN.m 2
VL-SD20U
7.
loading arm
S
pressure
S
S
pole b
d
S loading
gear
2?
M
roller assembly
Guide
Tu
uide rail
Tu
pressure spring
Tu
pole
loading
base assembly
assembly
arm
Dew
(3)
‘.
Down switch@f
2,
FPC cover
P
&,@)
SL
chassis
holder
S
Loading
3)
assembly
moto
Item
CW00.7-02.2-10.25
F @
G t Special
screw
Ml .2 x L1.8
I\ ’
/F) Drum base sub
/
’ .l> lx
A
Ii
/
Item
‘@ S Tight Ml.4 x L3
0 Special screw with step 70mN.m 1
Ml .4 x L8.25
Tightening 1~ Quantity
5mN.m
(Tentative tIghten
(2) PB guide spring
urface, rearsurface
side surface)
TghterIng torque Quantity
70mN.m
2
2
assembly
4
\
A ‘@
P 9
Item
Tight Ml .4 x
S
Ml.4 x L4
Tight
S
Tgkning torque
70mN.m
L3
7OmN-m
Quantity
1
1
9-5-2. Reassembly in side of the Slide chassis.
Numbers before part names are given as a guide to the
Note)
As for greasing/oiling/cleaning places refer to the attached drawings (Grease/Oil application Fig. 3, 4).
order of assembly.
(8) S reel base Ass’y
(9)
(s)J(@‘-@)
(1)
9-5
base Ass’y
Tu reel
s
Slide chassis assembly
with sensor FPC
B S Tight Ml.4 x L2
CW00.7-01.8~to.1 2
1 0
J @ W01.2-02.5-to.3 2
Item
Tgmening torque Quantity
40mN.m
1
VL-SDPOU
t-l
Notel) Be careful
the
(2)
14,
Plneh
,ewr
ASS’”
-
Tu Qulde
arm
A&y
@$I), be
t=sion band in
Note2)
Be careful not to
theecoat
~
1
L
IQ
Type2 minuteness .I 40mN.m
K
I I
M
fj
Ml
‘Q
Special
M1.4xL2
Special screw with step.
M1.4xLl
parts
(a, @ @
careful
.4 x
Ll
head screw
not
to
scratch or dent
@,
not to
deform
handling
it.
deform to tightenin!
the Screw lock to the
1 1 1
40mN.m
I I
40mN.m
and
the
2
1
in
J
9-5-3. Main chassis assembly and slide chassis assembly assembling method
(1) Set the US mode (see the figure below).
(2) Insert the slide chassis side operation pins (0 tension arm, @ Tu guide arm, @ pinch lever) in the position shown below at the
main chassis side, move the slide chassis in the arrow direction, using
into the aroove
of slide chassis,
and install with the 4
screws.
@ to @ as guides,
insert the loading lever operation pin
‘@Tightening torque
70
+ 7mN.m
(0.7 * 0.07kgcm)
l
Numbers
are given as
order
l
When treating the sensor
before part names
a
guide to the
of assembly.
FPC wire, pay attention to
the
part A shown in Fig. 6.
l
Oil application place is
shown in Fig. 5.
9-6
D 9 Special screw
Ml.4 xL1.6
Tightening torque Quantity
40mN.m
3
VL-SDPOU
fil!lB
GREASE/OIL APPLICATION
Fig. 1. Side of the main chassis
From rear
ace side
rom rear
@Pinch control lever
@Main cam
7
@Intermediate gear angle
@Drum base assembly @ITu guide cam @T arm control lever
Fig. 2. Side of the main chassis
r I
@S loading arm
surfaceside
G
000
0
@Loading lever
arc==@
7
@Tu loading arm
-ii
00: 0
0 00
0
Fig. 5. After joining the main chassis and slide chassis
Fig. 3. Side of the slide chassis
@Brake shifter
@ : Greasing
q : Greasing
Fig. 4. Side of the slide chassis
@@Pinch lever
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 below. Then,
the mechanism moves in the unloading direction.
@Swing arm
I
I
Fig. 6. Sensor FPC wiring
Min’f’ pole Loading motor
PIUS p
6 @:Oiling 1
Part A
Capstan motor rotor rotation direction
(from rear side of mechanism)
/
Fig. 1
9-7
VL-SDPOU
10. ADJUSTING THE ELECTRICAL CIRCUITS
Before starting the electric circuit adjustment
l The adiustment 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). lncase 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).
The VLSD20U and other models that follow are newly equipped with the digital interface function. The Digital Interface
IEEE1394 Standard stipulates that each set with the digital interface function be given its specific ID number. The ID
number is written on the E2PROM of the set while it is manufactured. If the E*PROM alone or the PWB having this E*PROM
on it has been replaced for repair purpose, it is necessary to write a new ID number again. (Note that any replacement
part does not have an ID number yet.)
Accordingly, the repair engineer must obtain the new ID number.
Head amplifier PWB
If the IC302 (E*PROM) or the head amplifier PWB has been replaced, it is necessary to write a new ID number. (Note that
any replacement part does not have an ID number yet.)
Obtain a new ID number from the service department of sales company. Take the following steps to write the ID number
on the E*PROM.
n Manual for obtaining and handlig IEEE1394 ID number
1. Access the intranet URL for the number below.
URL: http://www.rog.kami.sharp.co.jp/quics/e_index.html
2. Now enter User ID and Password, then click [Loginl .
*ID and Password should be same as for “PARTS PEICE LIST”.
Please enter User ID and Password.
. UserlD
. Password
tZ&!Zl I==
The VL-SD20U and other models that follow are newly equipped with the digital interface funcion.
The Digital Interface IEEE1 394 Standard stipulates that each set with the digital interface funcion be given its
specific ID number.
The ID number is written on the E*PROM of the set while it is menufactured.
If the E*PROM alone or the PWB having this E*PROM on it has been replaced for repair purpose, it is necessary
to write a new ID number again.
(Note that any replacement part code does not have an ID number yet.)
1 o-1
VL-SDPOU
Accordingly, the repair engineer must obtain the new ID number.
If you have any question, please contact bolow.
1\/1 ma_waki@ toh.sharp.co.jp
3. Enter model number, serial number, company name and FAX, as well as your own name.
After confirmation, click m.
For errors, click I(=ancell and enter correction.
Click ISearcFi] and confirm your ID number (can be reactivated if number is forgotten).
<Enter> One character (English letter) per byte.
Model: Model name (leave cut hyphens, brackets)
Serial No:
Manufaoturing number
Company/Fax. No.: Company name/Fax No. (multi fax or public line fax).
Name: Your name.
- A new ID number.
Please enter Model, Serial No., Company/Fax. No. and Name.
Model
Serial No.
Company/Fax. No.
Name
. Search ID number allocated to you.
4. For item 3 above, when you click m. the ID number matching any address will appear.
Press that number and follow “Entering Procedures for IEEE1394 ID Numbers” as you enter the data for Viewcan.
Please use below Number.
182 1 181 1 180 1 17F 117E
G & bl”
5. If you need the ID number again, click w] and use the same procedure.
Click IEndJ when you are finished.
[PLAY] key
r PI key
n Procedures for Entering IEEE1394 Numbers
1.
Set the power switch to the “VCR” position.
2.
Press “CONTINUE” on the adjustment remote control,
then press “VCR ADJ” and the address you chose will
appear on the LCD monitor.
LAddress: flashing
3. With “FF” or “REW” the desired address will appear.
Set with “PLAY” and data entry will show.
L [STOP] key
L [REW] key
L [VCR ADJ] key
L [CONTINUE] key
ADJ. REMOTE CONTROL
mber)
RRMCG 0033 TASA
4. With “FF” or “REW” the ID number (obtained through the Intranet) for any address wil appear. Set with “PLAY”.
5. Press “STOP” and the address selection will appear. Then you can enter your ID number in order under the given
address digits (182, 181, 180, 17F, 17E).
6. Set the power switch to the “OFF” position. Now the writing is complete.
1 o-2
PWB
terminal,
battery
inputting from the
When
push !nto the terminal spring from the
J
----
1
-SC? -
_
r--
I
I
QCNW-1373TAZZ
@
QCNW-1545TAZZ LE,.,S “,.,,T
check
touches GND.
terminal and
the
P900
of
4 of
negative side
that the pin
0 f
POWER PWB
45TAU
Battery Terminal
QTANZOI
1 @,
8
0
, t
P2901
n
Head
I
QPWBH2915TAZZ
@
4
8
T I
P2402 -
P1900
I
QCNW-1929TAZZ
@
MAIN
5
%
I
c
LCD Panel
I
AC Adapter
-1
@ QCNW-1274TAZZ
@Direct connection
I 0
VSPOO20P-968N
QSW-Z0306TAZZ
Microphone Unit
RMiCC0082TAZZ 07
7”‘““’ -
I
0
I
6) QCNW-1832TAZZ
QCNW-1930TAZZ \
J
HEAD AMP PWB
MECHANISM
I
s
i,
VL-SDPOU
VL-SD20U Specifications of service jigs
1 o-4
[TEST POINT]‘
VL-SDPOU
(Wiring board diagram: Main Side A)
(Wiring board diagram:
Main Side B)
(Wiring board diagram: POWER Side A)
II a” 1 I
n
II -=
(Wiring board diagram: VIDEO l/O Side A)
I c I
1 o-5
VL-SDPOU
[Making adjustments]
Adjusting the servo system controller and related parts
Setting the system codes
1.
Replacement of IC702 E’PROM requires the following data to be set in this order.
[Procedure]
Set the unit to the VCR mode and set the data
Destination 3. Specifications 4. Menu selection 5.
Code
1. Model code
2.
code
OA
1
FF
02
01 1 FE
Address
Data
01 1 09
1
00
for each address.
code code code
1 oc
03
14
OB
(
EB
1
04
00
FF 00
1
Software switching 6. Calendar switching
code
05
OD
1
FF 99 1
(
07 1
OF
66
When replacing the IC702 E2PROM, first make the following settings and then
(1) Electromagnetic conversion
26
I
25
I
1’105
28
28 1
Address1 27
Data
The address uses only when replacing the IC302.
l
Adjustment with automatic machine
l
Mode VCR ADJ mode
Procedure
Examples
Manual
l
I
Procedure
Examples
I
1 90
40
I
80
40 I 90 I 90
1
1) Using the 12 command, set the VCR adjustment mode.
2) Using the 20 command, give the E2PROM 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.
l During E2PROM (IC702) replacement.
a
justment
VCR ADJ mode
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.)
<Setting methods
3) Adjust the address by moving up and down the blinking numeral with the FF and REW key, and fix the address
4) Adjust to the setting by moving up and down the blinking numeral with the FF or REW key, and set data by
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
7) Set the CAM/OFF/VCR selection switch to OFF.
l During E’PROM (IC702) replacement.
I
Enter a setting corresponding to the address.
by pressing the PB key.
pressing the PB key.
down the “CONTINUE” key to cancel the VCR adjustment mode.
start the adjustments.
2. HSWP i
Mode
L
Procedure
Examples
L
justment
VCR ADJ mode
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].
Note: Adjustment cannot be performed when the error rate is improper.
During mechanism replacement.
l
During E’PROM replacement (IC302 inside the head amplifier circuit board).
l
1 O-6
VL-SDSOU
(Wiring
3.
SHUT
Measuring
Address
Adjustment
Test signal
Procedure
board
diagram:
OFF adjustment
instrument
rating
1
1
POWER Side A)
Digital
voltmeter
06, OE
6.OOV + 50mV
GND
1)
Set
TL9951
2)
Load a recordable tape.
3)
Set
the
4) Press
5)
6) Observing
7) Press the PB key
Turn off the power and the adjustment is completed.
the “Continuous
mode (01
Select 03 with REW or FF and
SND.
to
(
camera mode. Then, press the REC
Press” and
blinks).
then
the
power voltage
on the main unit.
from TL9945(-), set it so that TL9942(+) obtains 6.OOV
then the
press
Test point
Mode
Tape
key.
“Test
the PB key. (03 blinks ti
TL9942(+),
CAM
Recordable
Mode Select” on the
TL9945(-), TL9951
tape
remote
control to enter the
03
lights)
.
test
f 50mV.
ADJUSTING THE ELECTROMAGNETIC CONVERSION CIRCUIT SYSTEM
1. PLL VCO adjustment
Mode
Procedure
I I
Examples
2. Phase and equalizer adjustment + (Performed in the VCR mode)
Mn&
. ..___
Procedure
VCR ADJ mode
1) Playback the alignment tape (or
2) Call the adjustment mode
3) Set to
l
During E2PROM replacement.
1
VCR ADJ
_ - ..- _ ..___
1) Load a
2) After playback for 3 minutes, select the test mode OF using the remote control for adjustment to start the
4) Manual adjustment method (video adjustment mode)
l
address “24” and then change the screen
screen full of block noise is OK).
mode
self-recorded
automatic adjustment. (The following sequence is automatically performed.)
Select and fix the TEST MODE OB on the adjustment remote control.
Perform this adjustment with the self-recording/playback in the LP mode.
For phase, vary the data for the address 26and 28, and for equalizer, vary the data for the address 25 and 27
to set the error rate is made as small as possible.
tape into the deck.
a self-recorded tape).
(V-ADJ).
with FF/REW key until
the playback screen appears (the
Examples
WJ w r;;:Y:z~a~ion error ~~~~~~ ~;;~~~~;
l
l
During mechanism replacement.
l
During E*PROM replacement.
During circuit board (Main) replacement.
1 o-7
VL-SD20U
ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM
(Wiring board diagram: VIDEO l/O Side A)
1. PC0 D/A-Y adjustment
Test point
Mode
Procedure
Examples l During E*PROM replacement. l During IC4401 replacement. l During IC1401 replacement.
IIIX
Test point
Mode
Procedure
E
TL6724 (connected to oscilloscope)
EE mode
F
1) Connect the AV cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to “22”, 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 TL6724 to 1 .OVp-p + 0.05.
A. 2. PC0 D/r
-C adjustment
TL6725
EE mode
1) Connect the AV cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to “23”, and call the data.
4) Vary the data with the FF and REW keys to set the signal appearing at TL6725 to 0.64Vp-p + 0.05.
0.64310.05
Examples l During E2PROM replacement. l During IC4401 replacement. l During IC1401 replacement.
l----
1 O-8
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