Sharp VL-SD20U User manual

VL-SDPOU
SHARI= SERVICE MANUAL
S79K7VL-SD20U
LIQUID CRYSTAL DIGITAL CAMCORDER NTSC
MODEL VL-SD20U
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used. J
/- CONTENTS Page ’
1. IMPORTANT SERVICE NOTES.. .................................................................................................... l-l
2. SPECIFICATIONS ........................................................................................................................... 2-1
3. PART NAMES.. ................................................................................................................................ 3-l
4. DISASSEMBLY OF THE SET ........................................................................................................ .4-l
5. MECHANISM ADJUSTMENT JIGS AND PARTS .......................................................................... .5-l
6. INSPECTION AND MAINTENANCE
ITEMS AND INTERVALS ............................................................................................................... .6-l
7. MECHANICAL ADJUSTMENTS AND CHECKS ............................................................................ .7-l
8. TAPE RUNNING ADJUSTMENT ..................................................................................................... 8-l
9. MECHANICAL SECTION ASSEMBLY AND PARTS REPLACEMENT
(DISASSEMBLY AND REASSENBLY). ......................................................................................... .9-l
lO.ADJUSTING THE ELECTRICAL CIRCUITS ................................................................................. 10-l
11.USEFUL TIPS ................................................................................................................................ 1l-l
12.SIGNAL FLOW DIAGRAMS .......................................................................................................... 12-1
13.BLOCK DIAGRAMS ...................................................................................................................... 13-l
14SCHEMATIC DIAGRAMS .............................................................................................................. 14-1
15SEMICONDUCTOR LEAD IDENTIFICATION ............................................................................... 15-1
1G-PRINTED WIRING BOARD ASSEMBLIES ................................................................................... 16-1
17.REPLACEMENT PARTS LIST ....................................................................................................... 17-1
18.PACKlNG OF THE SET.. ............................................................................................................... 18-l
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, isola-
tion resistor/capacitor networks, mechanical insula-
tors 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.
retour au chassis (connexions d’antenne, coffret
metallique, tetesdevis, boutonsetarbresdecommande,
etc.) et mesurer lachutede tension CAentre laresistance.
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.
3. Pouretresfirqu’il n’yaaucun risquedechocelectrique,
verifier le courant de fuite de la maniere suivante.
Brancher lecordon d’alimentation secteurdirectement VTVM
dans une prise de courant de 120 volts. (Ne pas r-oECHELLE CA *-
utiliser de transformateur d’isolement pour cet essai).
Utiliser deux fils a pinces et connecter une resistance ’ .TGMS
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 SONDE D’ESSAI
1000 ohms par volt ou plus ou mesurer la chute de CONNECTER A
tension CA entre la resistance (voir diagramme). METALLIQUES UNE MASSE DE
Deposer la connexion de la resistance a toutes les EXPOSEES TERRE CONNUE
pieces metalliques exposees ayant un parcours de
l-l

VL-SDSOU
WARNING :TO REDUCETHE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO WET LOCATIONS.
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK. DO NOT REMOVE COVER. NO
USERSERVICEABLE PARTS INSIDE.
REFERSERVICINGTO QUALIFIEDSERVICE
PERSONNEL.
A This symbol warns the user of uninsulated
voltage within the unit that can cause danger-
ous electric shocks.
n
I This symbol alerts the user that there are
important operating and maintenance instruc-
0 tions in the literature accompanying this unit.
CAUTION
This symbol mark means following.
Forcontinued protection against fire haz- Ca!xder
ard, replace only with same type fuse.
(CP1; 1.2A 72V, CP2; 1.2A 72V)
This symbol mark means following.
“RISK OF FIRE- AC 2:layPter
REPLACE FUSE AS MARKED.” A
(Fl 01;2A 250V)
ATTENTION: POUR REDUIRE LES RESQUES D’INCENDIE OU DE CHOC ELECTRIQUE,
NE PAS EXPOSER CET APPAREIL A LA PLUIE OU A L’HUMIDITE.
RISQUEDECHOC ELECTRIQUE
NE PASOUVRIR n I
.
ATTENTION: AFIN DE REDUIRELESRISQUESDE
CHOC ELECTRIQUE,NE PASRETIRERLE
COUVERCLE,AUCUN ORGANE INTERNE
NE PEUTETREREPAREPAR
L’UTIUSATEUR,CONFIERL’APPAREILA
UNDEPANNEURQUALIFIE.
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.
A
n
I
0
Ce symbole signale a I’utilisateur la presence
dune tension non isoleeaI’interieurdeI’appareil La signification de ce symbole est la
qui peut etre lacause de secousses dlectriques suivante.
dangereuses. “RISQUE D’ INCENDIE - REMPLACEZ
LE FUSIBLE SELON L’ INDICATION.”
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.
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 RBRCTMSeal 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 offatthe nearest collection center for recycling. For information
on the nearest collection center, call 1-800-8-BATTERY or your local recycling center. Ifyou 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] ‘RBRCTMis 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:
NTSC standard
Pickup Device:
Lens:
Lens Filter Diameter:
Monitor:
Microphone:
Color Temperature Compensation:
Minimum Illumination:
Video Output Level:
Audio Output Level:
Speaker Output:
External Microphone Input:
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
Power Requirement:
Power Consumption:
Operating Temperature:
Operating Humidity:
Storage Temperature:
Dimensions (approx.):
Weight (approx.):
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.OVp-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
AC
AC
Power Requirement:
DC Output:
Power Consumption:
Dimensions (approx.):
Weight (approx.):
DC Output:
Dimensions (approx.):
Weight (approx.):
Adapter/Battery UADP-0303TAZZ
(VL-SD20UNT)
Adapter/Battery UADP-0304TAZZ
(VL-SD20UAAJW)
AC 1lo-240 V, 50160 Hz
9.0 v
15w
2 ‘l/,6” (W) x 1 15/32” (H) X 5 13/32” (D)
[68 mm (W) x 37 mm (H) x 137 mm (D)]
0.73 Ibs (330 g)
Battery Pack BT-L241
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)
Specifications are subject to change without notice.
1SERVICE 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
PC CONNECTion SNAPshot button
MICrophone
jack Shoulder strap
Terminal cover loop
AUDIO/VIDEO
jack S-VIDEO socket Hand strap
Operation buttons
DC IN lack J
Pdwer switch (CAMERA/VCR
select switch)
CHARGE Indicator
Remote sensor
When the cassette compartment door is open
Cassette holder 1 Cassette compartment
door release
ILIthnrm battery
holder
Cassette compartment door
Warning Indicators
EJECT THE EJECT THE The video cassette IS defective and should be
CASSETTE. CASSETTE. removed
/ DEW ( -+‘+ /
Dewhas 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 11wLh a
fully charged battery pack
I Q 1 -?#- 1cleaned
The video heads are clogged and shouldbe I
INSERT
A CASSETTE.
There IS no video cassette I” the VIEWCAM Inserf a
cassette
CASSETTE NOT _bkbiihi ‘iii_ The era?.ure protect tab on the video cassette has
RECORDABLE. been slid to the record-protect pos~ton. preventing
, I , I 1 I’, s _ \ record,ng
THE TAPE
ENDS SOON.
The tape IS about to end Prepare a new cassefte
~j+E’ kid-
/ I , I
CHANGE THE
CASSETTE.
LAMP
The tape has reached the end Replace I, w,,h a
TAPE END new cassette
The fluorescent lamp behlnd the LCD monitor IS
LAMP close to the end of 1,sserwce lkle Call your local
autlwrlzed Sharp dealer to have It replaced
When the lens section is rotated
DV InDut/output
Battery compartment door
Batterv comoartment door release
In SelfRecording mode. all warnings wll be
lndlcated by @ dlsplayed I” the center of the
monitor To check the type 01warning, rotate the
momtor back to the normal posltlo”
M0t.z :. lndlcates a flashing d,?.play
3-1

VL-SD2OU
4. DISASSEMBLY OFTHE SET
Note:
Before removing the cabinet, turn off the power supply, and ascertain that the battery have been removed.
Remove the screws ((u)LX-HZ0050TAFN)(lpc.) and . Remove the screws ((e)XiPSF17PO4000)(2pcs.) fixed the lens
((e)XiPSF17PO4000)( 1PC.)fixed the camera back cabinet. fitting and remove the lens unit.
>
_. 6.
P)
Remove the screws ((p)LX-BZO224TAFN)(2pcs.) fixed the
camera front cabinet.
3.
. 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.
..
(e)
. Remove the screws ((e)XiPSF17P04000)(5pcs.) fixed the
bottom cover.
8. (f)
(P)
Remove the screws ((p)LX-BZ0224TAFN)(lpc.) fixed the
camera back cabinet. 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 ((e)XiPSF17P04000)(1pc.) and ((t)LX-
HZ0050TAFF)(lpc.) fixed the VCR side cover.
Remove the screws ((t)LX-HZ0050TAFF)(2pcs.) fixed the LCD.
Removethescrew((b)XiPSN17P02000)(1pc.)fixedtheinverter.
12.
DV terminal PWB
Remove the screws ((e)XiPSFi 7PO4000)(2pcs.) and ((t)LX-
HZ0050TAFF)(2pcs.) fixed the LCD fixing angle.
Remove the screw ((t)LX-HZ0050TAFF)(lpc.) fixed the DV
terminal PWB.
Remove the screws ((t)LX-HZ0050TAFF)(2pcs.)fixed the PWB.
Remove the screws ((e)XiPSF17P04000)(lpc.) fixed the tilt.
15.
Remove \ * (0
the screws ((t)LX-HZOO50TAFF)(2pcs.) fixed the tilt.
16. Y
w Gf b(n)
Remove the screws ((w)LX-HZOOSSTAFF)(3pcs.) and ((n)LX-
HZ0077TAFD)(l PC.)fixed the mechanism.
<Screws>
a 1XiPSF17PO2000 ) M1.7~2 Black
4-2

5. MECHANISM ADJUSTMENT JIGS AND PARTS
5-l. Mechanism check adjustment jigs Configuration
1. Name
2. Pan No.
<Note: The entries of list> 3. Code
l Model, Uses Remarks
. PB-use cassette
Torque meter
!. 9DASD-1015
I. DB
SD-1015
. Torque screwdriver
15OmN.m (15kgcm)
I. JiGTD1500RTDH
;. CB
. Alignment tape - ( 1)
. VR3-GAZXS
. CF
Fortape running adjust-
ment.
I. Torque gauge I. Torque gauge head
?. JiGTG0045 !. 9EQTGH-DH5000
3. CN 3. BW
’ For use in VS-REW wind-
ing torque measurement. For use with the above torque gauge.
Master plane
!: SEQMP-VLPDl
I. CL
For checking reel base
height.
I. Alignment tape - ( II )
!. VR3-GTZQS
I. CG
For SW point adjustment.
SOADVC-TAPE can use,
too. ICode CU)
I. Height adjustment jig
!. SDAHG-PDI
). BZ
For height adjusting.
. For hexagon nut oppo-
#iteside 3mm bit.
!. LX-NZO102GEFW
For S guide hexagon
nut installation.
Tension gauge 4N
‘(400gf)
!. JiGSG0400
1.BK
For measurement of
pinch roller pressure.
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.
’ Bitshape(seefigurebelow).
Height adjustment
screwdriver
I. SEQDRiVER-DH5
1.BC
Forguide rolleradjustment.
Tolerance k 0.1
VL-SDPOU
:Miscellaneous>
1) Slide caliper
2) Precision screwdrivers
(Phillips head and slotted)
3) Radio needle-nose pliers
4) Tweezers
5-2. Parts for regular periodic inspection and maintenance
1. Oil 1. Cleaning paper 1. Grease: Moly Coat 1. Cleaning liquid:
Cosmo Hydro HV22/100 2. JiGDUSPER YM-103 industrial-use ethyl alcohol
2. HV22 : 9EQ-Oil-HV22 3. AP 2.99FGREASE-YM103 l Commerciallv avaitable item
3. HV22 : AE
l Cosmo Petroleum K.K.
l DUSPER C (SIGMA)
(ozu Co., LTD.) * Dow coaning
1. Screw lock (14018)
l Three Bond
1. Extremely thin cotton swab
l Commercially available item
<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.
(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
String
Fig. 1 String
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 Replace the drum a&y ifthe
video head is cleaned but the
envelope is not still appeared.
(When the envelope is normal,
refer to “11. USEFUL TIPS”.)
specially the lower drum helical
l The tape becomes slack.
l Block-type noise
l Abnormal noise
l The tape becomes slack. perform within the standard.
l The play-back image is
[Oil] Cosmo Hydro HV22, HVl 00 [Screw lock] Three Bond 1401B
[Grease] Moly Coat YM-103 [Cleaning liquid] industrial-use ethyl alcohol
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.
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 1AC 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
1AC 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 Fig. 1. Removal of tension band when
adhesive tape used in item (1) above (refer to 9-3). The STANDBY mode is set measuring the rewinding play-
automatically. back (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
/ MC contacts
Fig. 2
7-1
Fig. 3

VL-SDPOU
7-4. Back tension torque check and adjustment in record (playback) mode
1AC 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)
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)
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
(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. (Fig. 7)
B
j ;fi&?::i~ [i A
(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. 6. S reel base no-load torque
measurement method
motor and put the system into L. start mode.
Tension roller position (S guide standard)
J 0 lt 0.3
Fig. 4. Check (tape exists)
Tension roller position (S guide standard)
,- ,Sguide
Fig. 5. Position adjustment
(tape does not exist)
7-2

VL-SDSOU
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
1DC3V, 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
1DC3V, 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)
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.)D
A-
Fig. 9
D D
OK NG
Fig. 10
7-3
Fig. 7. Loading back tension measurement
method
Fig. 8. Winding Tu reel base ratchet torque
measurement method

VL-SDPOU
8. TAPE RUNNING ADJUSTMENT
8-l. Adjustment locations
Adjust the height of only
replaced parts with the _
adjusting jig.
Adjustment procedure 8-2 Running adjustm- Running rough Running final
ent preparation adjustment Cassette controller adjustment
Adjustment Adjustment installation Adjustment
procedure 8-3 procedure 8-4 procedure 8-5
<Replacement parts other
than those shown above>
_
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
Master plane
Fit height the par on low edge fitting.
After setting adjustment jigs, turn T roller
and S guide counterclockwise to 225”.
- n
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) Remove the cassette controller assembly. Sup guide roller Tu guide roller
(2) Clean the tape running surface (especially, adequately clean
the drum surface and the lower drum helicam surface). Tension roller
(3) Connect an oscilloscope to each TP on the relay circuit board.
(4) Turn the AC adapter power ON. \ \ Drym 1 Tu/guide
(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 S
and -l/4 shift, check whether all of it is flat. If it is not, perform
the following adjustment so that it becomes flat.
,the shift will change;l+l/4
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. V
(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)
rum to 180”
T roller
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.
Adjust so that A _;B.
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.
3lf crease is found, make an adjustment in the range of _+180”.
*After adjustment apply Screw Lock.
Pinch roller
Deformation
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.
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
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 Cleaning liquid: Industrial-use ethyl alcohol
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.
[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.)
S reel base Tu reel base
S main brake \
Brake shifter \ Tu main brake
LOADING START mode dianram
(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
REWINDING (VSR) mode diagram

15)PLAYBACK (RECORD, FF, VSF) mode
The mechanism position for playback, record, FF and fast
feed playback.
The pinch roller is pressed to the capstan axis, and the SITU
main brake is separated from the S/Tu reel base.
Pinch roller
I CaDstan shaft _
Tu main brake
(Not visible) PLAYBACK mode diagram
(RECORD, FF, VSF)
(6) STOP mode
The system is in the STOP (Ret 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.
/ Tu main brake
Tu reel base
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 @, 0, 0, and @I shown in Fig. 2, 3 and 4, raise the
side plate @ in the direction K to remove it.
Note) When removing the cassette controller, take care so that the drum motor
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)
Lock lever
A-
Fig.
Fig. 1. Lock lever
@/Down switch angle Slide ChasslS \
@JDown guide
Fig. 2 posltlcfllng
0 Down guide positioning Slide chassis
Fig. 3
@Top cover
Fig. 4. (Fig. from direction A)
9-2

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 Fig. 5. STANDBY mode
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)
Note)
Note)
Before disassembling, check the marker positions carefully.
When installing the engagement gear, make sure that the main cam
and sub cam phase matching hole aligns with the chassis hole.
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)
@ Down switch moving
piece
iv9 tape
Phase matching
mark
MODE switch
Phase matching
mark
Main cam / Coupling gear I Sib cam
Fig. 6
Phase matching hole
(for chassis)
t
Phase matching hole
(for chassis)
Fig. 7
9-3

VL-SD20U
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).
1. Groove grease (2) Pinch drive lever
(1) Pinch control lever
Main chassis assembly
>
_. (2) Mechanism fixing angle
assembly (Rear surface) B-4
Note) The numbers following
A and B indicate the
I /Ai! I I screw tightening order
n chassis assembly
Item TgMeningtorque Quantity
A @ S Tight Ml.4 x L3 70mN.m 3
B @ S Tight Ml.4 x L2 70mN.m 6
AHC control lever
2) Lock lever guid
Positioning h;e Item ImgMeNngtorque1Quantity
9 S Tight. Ml.4 x L2 1 70mN.m 1 1
(5) Capstan motor@
(2) Shifterdrive
lever assembly
,,‘m q MeXnism fixing anale
ID 19Specl
, 1
ial screw 40mN.m 1 4
Ml .4 x L1.6
@@@
(4) Intermediate gear angle
sub assembly
(1) Intermediate pulley
(2) Center pulley asse
Item ITtthteNng toqus 1Quantity
B 1’9 S Tight. Ml.4 x L2 I 70mN.m I 1
eck
Guide rail sub assembly
(Rear surface)
Item TghteNrg torque Quantity
E Q Special screw 40mN.m 2
M1.4xL1.5

VL-SD20U
7. 2?
M Guide roller assembly
S pole b
S loading arm
S pressure
Tu pole base assembly
uide rail
d
S loading gear
Tu loading arm assembly
Tu pressure spring
Item Tightening1~ Quantity
F @ CW00.7-02.2-10.25 2
G t Special screw 5mN.m 2
Ml .2 x L1.8 (TentativetIghten
3) Loading moto
assembly (2) PB guide spring
urface, rearsurface
side surface)
I\ ’
’ .l> lx / / /F) Drum base sub assembly
Item TghterIng torque Quantity
A ‘@ S Tight Ml.4 x L3 70mN.m 4
Ii 0 Specialscrewwith step 70mN.m 1
Ml .4 x L8.25
‘. (3) Dew FPC cover P
2, Down switch@f &,@) SL chassis holder S
\ Item Tgkning torque Quantity
A ‘@ S Tight Ml .4 x L3 70mN.m 1
P 9 S Tight Ml.4 x L4 7OmN-m 1
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 Fig. 3, 4).
(8) S reel base Ass’y
(9) Tu reelbase Ass’y
(s)J(@‘-@) s
(1)Slide chassis assembly
with sensor FPC Item Tgmeningtorque Quantity
B S Tight Ml.4 x L2 40mN.m 1
1 0 CW00.7-01.8~to.1 2
J @ W01.2-02.5-to.3 2
9-5