Sharp VL-PD1U User manual

VL-PDl U
SHARP SERVICE MANUAL
S38N4VL-PDI U/
LIQUID CRYSTAL DIGITAL CAMCORDER NTSC
1.
2.
3.
4.
5
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6
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8.
9
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MODEL VL-PDI u
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.
Page
IMPORTANT SERVICE NOTES .......................................................................*.............................. l-l
SPECIFICATIONS ........................................................................................................................... 2-l
PART NAMES .......................................................................................................................~.......... 3-1
DISASSEMBLY OF THE SET .........................................................................................................4-1
MECHANISM ADJUSTMENT JIGS AND PARTS ...........................................................................5-I
INSPECTION AND MAINTENANCE
ITEMS AND INTERVALS ................................................................................................................6-l
MECHANICAL ADJUSTMENTS AND CHECKS .............................................................................7-l
TAPE RUNNING ADJUSTMENT ................................................................................*.................... 8-l
MECHANICAL SECTION ASSEMBLY AND PARTS REPLACEMENT
(DISASSEMBLY AND REASSENBLY) ...........................................................................................9-l
1O.ADJUSTlNG THE ELECTRICAL CIRCUITS ................................................................................. IO-I
11.USEFUL TIPS ................................................................................~............................................... 11-I
12.SIGNAL FLOW DIAGRAM .........~.........................................................................‘........................” 12-1
13.BLOCK DIAGRAM ........................................................................................................................ 13-I
14.SCHEMATlC DIAGRAM ...............................................................................................................* 14-I
15SEMICONDUCTOR LEAD IDENTIFICATION ...............................................................................15-1
16.PRINTED WIRING BOARD ASSEMBLIES .............................................*..................................... 16-1
17.REPLACEMENT PARTS LIST ......................................~................................................................ 17-1
18.PACKING OF THE SET .~.................................................,.......................................................~..... 18-1
SHARP CORPORA’lON This document has been published to be used for
after sales service only.
The contents are subject to change without notice.

VL-PDl U
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.
l 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 0.15pF capacitor in series with
all exposed metal cabinet parts and a known ground,
such as a water pipe or conduit.
l Use aVTVM or VOM with 1000 ohm pervolt, or higher
sensitivity or measure the AC voltage drop across the
resistor (See Diagram).
l 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. /
m .
VTVM
0 AC SCALE 0 \
,
’ ~5:ooo~ms
TO EXPOSED
METAL PARTS
;I:“’ E$H
1. NOTES DE SERVICE IMPORTANTES .
AVANT DE RENDRE LE MAGNETOSCOPE
Avant de rendre le magnetoscope a I’utilisateur, effectuer
les verifications de securite suivantes.
i
retour au chassis (connexions d’antenne, coffret
metallique, tetesdevis, boutons etarbres decommande,
etc.) et mesurer lachutede tension CAentre la resistance.
Inverserlafiche6A(uneficheintermediairenonpolaris~e
doit etre utilisee a seule fin de faire ces verifications.) sur
1. Verifier toutes les gaines de fil pour etre sur que les fils I’appareil et repeter les mesures de tension CA pour
ne sont pas pin&s ou que le materiel n’est pas coin& chaque piece metallique exposee. Toute lecture de
entre le chassis et les autres pieces metalliques dans le 0,45 V rms (ceci correspond a 0,3 mA rms CA) ou plus
magnetoscope. est excessive et signale un danger de choc qui doit etre
2. Verifier tous les dispositifs de protection tels que les corrige avant de rendre le magn6toscope 3 son
boutons de commande non metalliques, les materiaux utilisateur.
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. Pour etre stir qu’il n’y a aucun risque de choc electrique,
verifier le courant de fuite de la maniere suivante. VTVM
. Brancher le cordon d’alimentation secteur directement
dans une prise de courant de 120 volts. (Ne pas oECHELLE CA 0 \
utiliser de transformateur d’isolement pour cet essai). ‘-5%fYMs
. Utiliser deux fils a pinces et connecter une rkistance
de 10 watts 1,5 kohm en parallele avec un
condensateur de 0,15 PF en serie avec des pikes du
coffret mbtallique expos6es et une masse de terre
connue telle qu’un tuyau ou un conduit d’eau.
. Utiliser un VTVM ou VOM avec une sensibilitb de
1000 ohms par volt ou plus ou mesurer la chute de
tension CA entre la ksistance (voir diagramme). METALLIQUES
. Deposer la connexion de la resistance a toutes les
pieces metalliques exposees ayant un parcours de
1-1

VL-PDl U
WARNING :TO REDUCETHE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO WET LOCATIONS.
This symbol mark means following. Camcorder
CAUTION: TO REDUCE THE RISK OF ELECTRIC For continued protection against fire haz- only
SHOCK. DO NOT REMOVE COVER. NO ard, replace only with same type fuse.
USERSERVICEABLE PARTS INSIDE. (CP901; 1.25A 24V, CP902; 1.25A 24V,
REFER SERVICING TO QUALIFIED SERVICE CP903; 1.25A 24V)
PERSONNEL.
A
This symbol warns the user of uninsulated
voltage within the unit that can cause danger-
ous electric shocks.
A I
This symbol alerts the user that there are
important operating and maintenance instruc-
0 tions in the literature accompanying this unit.
ATTENTION: POUR REDUIRE LES RESQUES D’INCENDIE OU DE CHOC ELECTRIQUE,
NE PAS EXPOSER CET APPAREIL A LA PLUIE OU A L’HUMIDITE.
A 0
AA
RISQUE DE CHOC ELECTRIQUE A 1
NE PAS OUVRIR 0
ATTENTION: AFIN DE REDUIRE LES RISQUES DE
CHOC ELECTRIQUE, NE PAS RETIRER LE
COUVERCLE, AUCUN ORGANE INTERNE
NE PEUT ETRE REPARE PAR
L’UTIUSATEUR, CONFIER L’APPAREIL A
UN DEPANNEUR QUALIFIE.
A Ce symbole signale a I’utilisateur la presence
d’une tension non isolee a I’interieur de I’appareil
qui peut etre la cause de secousses electriques
dangereuses.
A Ce symbole avertit I’utilisateur que des in-
1 structions importantes relatives a I’utilisation
et al’entretien se trouvent dans le manuel
0 accompagnant I’appareil.
ATTENTION
Ce symbole signifie que l’on devra uti- Camcorder
liser un fusible de meme type (CP901; seulement
1,25A 24V, CP902; 1,25A 24V, CP903;
1,25A 24V) pour assurer la securite.
A
12
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VL-PDI U
/
/fj CAUTION
BEFORE BATTERY DESTROY
NICKEL-CADMIUM BATTERY
The following program is available in the United States. Please consult local environmental
authorities concerning the availability of this or other programs in your area.
The RBRCTM Seal
SHARP participates in the RBRC TM* 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 I-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.
NICKEL-METAL HYDRIDE BATTERY
LITHIUM or LITHIUM-ION BATTERY
SEALED LEAD BATTERY
Battery disposal
Contains the above (Rechargeable) Battery. must be recycled or disposed of properly.
Remove the Battery from the products and contact Federal or State Environmental Agencies for
information on recycling and disposal options.
1-3

2. SPECIFICATIONS
Signal System:
Recording System:
Cassette:
Recording/Playback Time:
Rewind and forward 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:
White balance adjustment:
.
ins .
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)
180 seconds using AC adapter (DVMGO)
SP mode: 18.812 mm/second
LP mode: 12.555 mm/second
l/3” (6 Omm effective size: 4.5 mm) CCD image sensor (with approx.
660,060 pixels including optical black)
10 x power zoom lens (F1.6-2.3, f=4.4-44 mm), full-range auto focus, manual
focusing possible
37 mm/screw pitch: 0.75 mm
4” (10.1 cm) -full-color LCD screen (TFT active matrix)
Electret stereo microphone
Auto white balance with white balance lock
8 lux (20 lux measured by EIA standard) (F1.6, with gain-up and digital zoom off)
1.OVp-p 75-ohm unbalanced, S-Video terminal, Y-signal 1.OVp-p chroma signal
286 m Vp-p (burst signal) 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 2.7 V, for
plug-in-power microphone use
auto-tracking system with white balance lock function
Multi-weighted photometric system (adjustable)
DC 7.2V
6.3W (during camera recording using the viewfinder in full auto mode with zoom
motor off)
7.2W (during camera recording using LCD screen in full auto mode with zoom
motor off backlight in normal mode)
O°C to +4O”C (32°F to 104°F)
30% to 80%
- 20°C to +6O”C (-4°F to 140°F)
2 g/& (W) x 3”15/16(H) x 7 ll/&’ (D) without Lens hood and protruding parts
[57 mm (W) x 99.7 mm (H) x 194.9 mm (D)]
1.46 Ibs (660 g) (without battery pack, lithium battery, video cassette)
AC Adapter/Battery Charger (UADP-0266TAZZ)
Power Requirement:
DC Output:
Power Consumption:
Dimensions (approx.):
Weight (approx.):
DC Output:
Dimensions (approx.):
Weight (approx.):
AC 11O-240 V, 50/60 Hz
8.6 v
16W
2 7/,6” (W) x 1 3/~” (H) x 5 ‘/$’ (D)
[62 mm (W) x 44 mm (H) x 140 mm (D)]
0.56 Ibs (255 g)
Battery Pack BT-L43
7.2V
1 ‘7t32” (w) x ’ 3/, 6” (H) x 4 7/32” (D)
[39 mm (W) x 20.5 mm (H) x 107 mm (D)]
0.32 Ibs (145 g)
Specifications are subject to change without notice.
SERVICE INFORMATION (For the U.S.)
For the location of the nearest Sharp Authorized Service, or to obtain product literature, accessories, supplies
or customer assistance, please call I-800-BE SHARP (I-800-237-4277).
21
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L-PDl U
3. PART NAMES
For details on the use of each control.
Cassette compartment
door release
Zoom lens
Stereo microphone
Terminal cover EarPHONES jack
S-Video socket
AUDIO/VIDEO jack
PLUG IN POWER
MICrophone jack
DV terminal
- Memory backup battery
compartment
Tripod adapter socket
3-l

VL-PDl U
LCD lock release
Cable notch cover
SNAP switch
Power Zoom
lever (Wide
angle/
Telephoto)
Power switch
(CAMERA/
compartment
latch
Battery
compartment
door
(When the cassette compartment cover is opened.)
REC
butto
Shou
loop
START/STOP
Cassette compa rtment
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VL-PDl U
4. DISASSEMBLY OFTHE SET
Note:
Before removing the cabinet, turn off the power supply, and ascertain that the battery and DC cable have been removed.
1. Remove the screws ((c)LX-BZ0221TAFC)(3 PCS.)of the front cover.
2. Remove the screws ((c)LX-BZ0221TAFC)(G PCS.) of bottom and cabinet fixing angle and the screws ((j)LX-
HZOO50TAFF)(2 PCS.),remove the screw ((r)XiPSF17P08000)(one PC.)and the screw ((q)LX-HZOO54TAFF)(one PC.),
disconnect the connectors of the S/S switch unit FPC and the EJECT switch unit, remove the cabinet A.
.
0)
0
r
3. Remove the battery lid.
Battery lid
4. Remove the screws ((o)LXgBZ0201TAFE)(3 PCS.)and the screw ((p)LX_BZO202TAFD)(one PC.), disconnect the H/A
connector and remove the mechanism section.
4-1

VL-PDl U
5. Withdraw the camera front cabinet, remove the screws ((c)LX-BZ0221TAFC)(2 PCS.) and the screw ((n)LX-
BZ0203TAFN)(one PC.), disconnect the two FPCs and remove the lens unit.
6. Remove the screws ((c)LX-BZ022lTAFC)(2 PCS.), disconnect the FPC of terminal unit and the microphone lead
connector.
7. Remove the power angle between the power FPC and the cabinet B.
Power
8. Remove the screws ((c)LX-BZ0221TAFC)(2 PCS.),disconnect the FPC, and remove the V/F unit.
4-2

L-PDI u
9. Disconnect the three FPCs of LCD, one operation unit FPC and three lead wires from the connector, remove the screws
((c)LX-BZOZ21TAFC)(5 PCS.), and remove the main PWB and H/A unit board connector.
FPC Lead wire
Operation unit FPC
IO. Disconnect two connectors and remove the power FPC and tripod angle.
11. Remove the screws ((c)LX=BZ0221TAFC)(2 PCS.), and remove the operation switch unit.
12. Remove the screws ((b)LX=BZ0220TAFC)(2 PCS.),and remove the tilt cover.
4-3

VL-PDl U
13. Remove the
Remove the screws ((m)LX-BZ0214TAFF)(2 PCS.) and the screw ((c)LX-BZ0221TAFC)(one PC.).
assembii of LCD section.
(Disassembling the PWB unit)
14. Remove the shield sheet from the PWB unit, remove the camera FPC, remove the FPC from the remote control light
receiving unit, and remove H/A-FPC.
Shield
(Disassembling the battery terminal section)
15. Remove the screw ((j)LX-HZOO5OTAFF)(one PC.)fixed to the t
remove the battery terminal.
Camera FPC
ripod angle, peel the double-coated adhesive tape, and
Tripod angle
Double-coated adhesive tape
(Disassembling the V/F section)
16. RemovetheV/F PWB holder, remove theV/F backlight spacerfrom the V/F LCD panel, and remove the V/F LCD panel
from the V/F backlight unit. V/F PWB holder
V/F backlight unit
I
V/F LCD panel
ht
44
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L-PDl U
17. Remove the V/F LCD spacer from the V/F lens assembly.
V‘/F LCD spacer
(Disassembling the LCD section)
18. Remove the screws ((k)XiPSC17P04000)(2 PCS.) at the LCD panel rotating unit side and the screws ((d)LX-
HZ0050TAFF)(2 PCS.)and remove the LCD front cover.
Be careful to remove what the LCD front cover and the LCD panel have pasted will double coated adhesive tape.
LCD
19. Remove the three FPCs from the connectors, and remove the panel.
CN3
20. Remove the screws ((k)XiPSC17P04000)(2 PCS.) and the screw ((b)LX-BZ0220TAFC)(one PC.), and remove the
shield sheet, rotating unit, inverter PWB holder and inverter unit. (b)
4-5

VL-PDl U
21. Remove the touch panel from the LCD panel.
Note:
Use the touch panel after destaticizing. Be careful so that stress is not applied to the touch panel FPC. Especially, do not
bend at the panel front side. It is prohibited to move, holding only the FPC section.
The touch panel is fitted with the double-coated adhesive tape.
22. Remove the light guide holding spring, remove the lamp unit, reflecting sheet/light guide plate.
Lamp unit, Reflecting
Light guide holding spring
23. Remove the diffusion sheet, prism sheet, and diffusion sheet from the LCD holder.
LCD panel
LCD holder
Diffusion sheet Prism sheet

L-PDl U
5. MECHANISM ADJUSTMENT JIGS
5-I. Mechanism check adjustment jigs AND PARTS
measurement
4. Tension gauge 4N JiGSG0400 BK
1
l For measurement of
(400gf) \\
0 r pinch roller pressure.
5. Dial tension gauge 9DAPTG-1 O-l OW CA
4 lpTG-‘o
6. Torque screwdriver JiGTD1500RTDH CB
150mN*m (1.5kgcm) tk 50 or more y--
021 \
No. 0 cross-bit
7. Master plane SEQMP-VLPDI CL
\
l For checking reel
0
base height
0
0
8. Height adjustment jig 9DAHG-PDl BZ
3
l For height adjusting
1 I
9. Height adjustment SEQDRiVER-DH5 BC l For Si roller adjustment
screwdriver
/’
l For guide roller adjustment
l For Tu guide adjustment
l Bit shape (see figure below)
Tolerance + 0.1
b&
1 1.4 1 *
Tip thickness 0.5
3
51
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VL-PDl U
(2) Precision screwdrivers (Phillips head and slotted)
<How to make jigs for mechanism checking and adjustment>
(1)Reel hub for back tension measurement
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.
1) Obtain an approximately 20cm length of commercially available string.
2) Tie the 2 ends together to form a loop.
5-2. Parts for regular periodic inspection and maintenance
No. Name Part No. Code Configuration Model, Uses Remarks
1. Cleaning paper JiGDUSPER AP l DUSPER C (SIGMA)
(ozu Co., LTD.)
2. Extremely thin cotton l Commercially available
swab item
3. Screw lock( 1401 B) l Three Bond
4. Cleaning liquid: l Commercially available
industrial-use ethyl item
alcohol
5-2

VL-PDl U
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-l. List of inspection and maintenance items
Inspection and
maintenance location
Tape running section
(see section 8-1)
E -
a,
5
?Y
F
.- Drum section, Video head
E
3 (see section 8-1)
:
%
I-
Timing belt
Pinch roller
Capstan motor
Swing arm
S reel base, Tu reel base
Time of use (h) Symptoms that indicate Remarks
500 1,000 1,500 2,000 3,000 need for maintenance
0 cl cl 0 0 l Block-type noise <Rollers>
l Head hole clogging l Replace if there is anything
l Tape damage abnormal in the rotation, or
if there is run-out (that
Note: becomes large).
17 III 0 c] 0 Replace the drum ass’y if <Other than the above>
the video head is cleaned l Clean the section that
but the envelope is not contacts the tape (espe-
still appeared. (When the cially the lower drum helical
envelope is normal, refer section). Use the specified
to “11. USEFUL TIPS”.) cleaning liquid.
- *o - * 0 * 0 l The tape fails to run. l Replace if there is anything
l The tape becomes abnormal.
0 0 0 00 0 slack.
0 0 0 l Block-type noise
l Abnormal noise
- *o - *o *o
E Center pulley shaft
a, Intermediate pulley shaft
g Swing arm boss
v)
? Intermediate gear A shaft,
.-
6 intermediate gear B shaft
Tension-arm shaft
A - A A *Abnormal noise l Lubricate with oil.
10 11
i
Cosmo Hydro HV22
.... Excepting intermediate
gear A and B
a
A - A A lTape damage Cosmo Hydro HVIOO
“” Intermediate gear A
l Abnormal played-back and B
image Note: Apply oil to the shaft,
then wipe lightly with a
cloth.
Loading motor - *o - * 0 * 0 l Cannot eject. l Replace if anything is abnormal
Mode switch l Fails to enter a mode. (including the noise).
Abnormal noise
Y * * * * * *The tape fails to run. l Replace any part that fails
8
5 PBVS/REW winding torque - * - * * l The tape becomes to perform within the
slack. standard.
$ PB . VS/R l loading back ten- - * - jt * l Tape damage
S sion l The play-back image is
E abnormal.
;5 Tu reel base ratchet torque
‘t
I? S reel base no-load torque
AHC 0 0 0
[Oil] Cosmo Hydro HV22, HVlOO [Screw lock] Three Bond 1401B
[Grease] Moly Coat YM-103 [Cleaning liquid] Industrial-use ethyl alcohol
0 l l l Replace. 0 l l l Clean. A. l l Lubricate. 1r0 l l Check.
61
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VL-PDI U
6-2. Precautions 1
(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 figure below, on the point of a pin.
,.;g::::
.:.:.:
$$g:. :::::
.:y:::.
N
~~~~~~~~. ..:.:.:.:
;::::::::.
i.......... ..>w.
.>g$g$~ ..:.x.:..
...fS...
1.5mm diameter Y$($.J$Y
‘A:.:.:8..
or less
Oil
(4)Petform 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. l), 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. 1. Do not push anything else.
(7)Do not deform any of the mechanical parts.
Fig. 1.
6-2

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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 for mechanism adjustments and checks.
AC adapter used, with cassette controller assembly 1
07-l Checking the playback (recording) winding torque
07-4 Back tension torque check and adjustment in record (playback) mode
1 AC adapter used, without cassette controller assembly (independent Mechanism) 1
07-2 Checking the rewinding playback (VS-REW) winding torque
DC3V, without cassette controller assembly (Independent Mechanism)
07-3 Checking of reel base height
07-5 Checking and adjustment of tension roller position in record (playback) mode
07-6 Checking of supply S reel base no-load torque
07-7 Checking of loading back tension
07-8 Checking of winding Tu reel base ratchet torque
07-9 Checking of rewinding playback (VS-REW) back tension
l7-10 Checking of pinch pressing force
(2) When performing checks with a DC3V 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 ptayback (recording) winding torque
(l)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
0.70 * 0.35mNm (7.0 + 3.5gfcm),
ripple 0‘.2mN*m (2gfcm) or less
(If there is torque ripple, read the center value.)
7-2. Checking. the rewinding playback (VS-REW) winding torque
(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.)
Fig. 1. Removal of tension band when measur-
ing the rewinding playback (VS-REW)
winding torque
7-l

VL-PDI U
Rewinding playback (VS-REW) winding torque standard
1.6 + O.GmN=m (16 + Ggfcm),
ripple 0.4mN*m (4gfcm) or less
(If torque ripple exists, read its center value.)
(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.
7-3. Checking of reel base height
(l)Remove the cassette controller assembly (refer to 9-2).
(2)Referring to 9-1, apply DC3V to the loading motor and put the system into playback mode.
(3)Taking adequate care so that the master plane does not
contact drum, running parts (guide roller, etc.), or the MIC
contacts. Fit the master plane holes to the 2 guides (A and
B) in Fig. 2.
(4)Confirm that the heights of the S reel base reel receiving
surface and the Tu reel base reel receiving surface below
the master plane top surface are within the set values,
using, for example, a slide calliper (Fig. 3).
When checking the S reel base height, press the front end
of tension post in the arrow A direction with your finger to
release the tension band, and then check the height in this
state.
B
tacts
Fig. 2.
(5)lf 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. 3.
7-4. Back tension torque check and adjustment in record. (playback) mode
(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>
0.7 + 0.1 mN*m (7 + lgcm)
(If torque ripple exists, read its center value.)
7-2

L-PDl U
(2)Adjustment
If the value is out of standard range, adjust, using the
screw 1 shown in Fig. 4.
1. Loosen the screw 2 slightly.
2. Adjust to turning the screw 1. When back tension is
too high, turn the screw 1 counterclockwise (CCW).
When back tension is too low, turn the screw 1
clockwise (CW).
3. After adjustment fix the angle with the screw 2. (At
this time take care so as to prevent excessive
tightening.) Apply Screw Lock to the screw 1.
<Caution>
Screw tightening torque: 0.04Nm (0.4kgcm)
Tension roller position (S guide standard)
Tension roller ,I,
Fig. 4. Check (tape exists)
7-5. Checking and adjustment of tension roller position in record (playback) mode
(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
1.
2.
3.
4
5:
Set the playback mode without loading the tape.
Loosen the screw 3 slightly (to such an extent that the tensionband holder 4 can be moved).
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.)
Check the position by the procedure described in item (1) Checking above.
If the position is not specified position, adjust again.
Tension roller position (S guide standard)
Fig. 5. Position adjustment (tape does not exist)
7-3