Sharp VC-A565U User manual
1
VC-A565U/H965U
S41R7VC-A411U
SERVICE MANUAL
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
VIDEO CASSETTE RECORDER
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.
VC-A565U
VC-H965U
CONTENTS
Page
1. GENERAL INFORMATION ...........................................................................................................5
2. DISASSEMBLY AND REASSEMBLY ........................................................................................... 7
3. FUNCTION OF MAJOR MECHANICAL PARTS......................................................................... 10
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS........................ 12
5. ELECTRICAL ADJUSTMENT ..................................................................................................... 30
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE ...................... 32
7. TROUBLESHOOTING ................................................................................................................ 38
8. BLOCK DIAGRAM....................................................................................................................... 50
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN................................................................. 58
10. REPLACEMENT PARTS LIST.................................................................................................... 71
11. EXPLODED VIEW OF MECHANICAL PARTS ........................................................................... 76
12. PACKING OF THE SET .............................................................................................................. 83
MODELS
SERVICE MANUAL
MODELS VC-A565U/H965U
VIDEO CASSETTE RECORDER
VC-H965U
VC-A565U
2
VC-A565U/H965U
IMPORTANT SERVICE NOTES
WARNING :TOREDUCE THE RISK OF FIRE OR ELEC-
TRIC SHOCK, DO NOT EXPOSE THIS AP-
PLIANCE TO RAIN OR MOISTURE.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK. DO
NOT REMOVE COVER. NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
This symbol warns the user of uninsulated voltage
withintheunitthatcancausedangerouselectric shocks.
This symbol alerts the user that there are important
operating and maintenance instructions in the literature
accompanying this unit.
This symbol mark means fast operating fuse.
For continued protection against risk of fire, replace
only with same type fuse F901 (3.0A, 125V).
CAUTION:
BEFORE RETURNING THE VIDEO CASSETTE
RECORDER
Before returning the video cassette 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 cassette
recorder.
2. Inspect all protective devices such as non-metallic
control knobs, insulation 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
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, 10 watt
resistor paralleled by a 0.15µF capacitor in series with
all exposed metal cabinet parts and a known earth
ground, such as a water pipe or conduit.
●Use an SSVM 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 earth exposed metal
part having a return path to the chassis (antenna,
metal cabinet, screw heads, knobs and control shafts,
etc.) and measure the AC voltage drop across the
resistor. Reverse the AC plug on the set and repeat
AC voltage measurements for each exposed part.
Any reading of 0.45V rms (this corresponds to 0.3mA
rms AC.) or more is excessive and indicates a poten-
tial shock hazard which must be corrected before
returning the video cassette recorder to the owner.
3.0A 125V
SSVM
AC SCALE
1.5k ohms.
10W
CONNECT TO
KNOWN EARTH
GROUND
TO EXPOSED
METAL PARTS
0.15 µF
TEST PROBE
3
VC-A565U/H965U
NOTES DE SERVICE IMPORTANTES
ATTENTION: POUR REDUIRE LES RESQUES D'IN-
CENDIE OU DE CHOC ELECTRIQUE,
NE PAS EXPOSER CET APPAREIL A
LA PLUIE OU A L'HUMIDITE.
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
ATTENTION
Ce symbole avertit l'utilisateur que des instructions
importantes relatives à l'utilisation et àl'entretien se
trouvent dans le manuel accompagnant l'appareil.
ATTENTION: AFIN DE REDUIRE LES RISQUES DE CHOC
ELECTRIQUE,NEPASRETIRER LECOUVERCLE,
AUCUN ORGANE INTERNE NE PEUT ETRE
REPARE PAR L'UTILISATEUR. CONFIER
L'APPAREIL A UN DEPANNEUR QUALIFIE.
Ce symbole signale à l'utilisateur la présence d'une
tension non isolée à l'intérieur de l'appareil qui peut être
la cause de secousses électriques dangereuses.
PRECAUTION:
Cette marque indique le fusible à action in stantansée.
Pour la protection continue contre le risque d'incendie,
ne remplacer que par le fusible type F901 (3,0A, 125V).
AVANT DE RENDRE LE MAGNETOSCOPE
Avantde rendre le magnétoscope à l’utilisateur, effectuer
les vérifications de sécurité suivantes.
1. Vérifier toutes les gaines de fil pour être sûr que les fils
ne sont pas pincés ou que le matériel n’est pas coincé
entre le châssis et les autres pièces métalliques dans
le magnétoscope.
2. Vérifier tous les dispositifs de protection tels que les
boutons de commande non métalliques, les matériaux
d’isolement, le dos du coffret, les couvercles de
compartiment et ajustement ou les boucliers, les
réseaux de résistance / condensateur d’isolement, Ies
isolateurs mécaniques, etc.
3. Pourêtresûrqu’iln’yaaucunrisquedechocélectrique,
vérifier le courant de fuite de la maniére suivante.
●Brancherlecordond’alimentation secteur directement
dansuneprisedecourantde120volts.(Nepas utiliser
de transformateur d’isolement pour cet essai).
●Utiliser deux fils à pinces et connecter une résistance
de10watts1,5kohmenparallèleavecuncondensateur
de 0,15 µF en série avec des pièces du coffret
métallique exposées et une masse de terre connue
telle qu’un tuyau ou un conduit d’eau.
●UtiliserunVTVMouVOMavecunesensibilitéde1000
ohms par volt ou plus ou mesurer la chute de tension
CA entre la résistance (voir diagramme).
●Déposer la connexion de la résistance à toutes les
pièces métalliques exposées ayant un parcours de
retour au châssis (connexions d’antenne, coffret
métallique, tétes de vis, boutons et arbres de
commande, etc.) et mesurer la chute de tension CA
entre la résistance. Inverser la fiche CA (une fiche
intermédiaire non polarisée doit être utilisée à seule fin
de faire ces vérifications.) sur l’appareil et répéter les
mesures de tension CA pour chaque piéce métallique
exposée. Toute lecture de 0,45 Vrms (ceci correspond
à 0,3 mArms CA) ou plus est excessive et signale un
danger de choc qui doit être corrigé avant de rendre le
magnétoscope à son utilisateur.
3,0A 125V
0,15 µF
SONDE D'ESSAI
VERS PIECES
METALLIQUES
EXPOSEES
VTVM
ECHELLE CA
1,5 KOHMS
10W
CANNECTER A
UNE MASSE DE
TERRE CONNUE
4
VC-A565U/H965U
PRECAUTIONS IN PART REPLACEMENT
When servicing the unit with power on, be careful to the section marked white all over.
This is the primary power circuit which is live.
When checking the soldering side in the tape travel mode, make sure first that the tape has been loaded and then turn
over the PWB with due care to the primary power circuit.
Make readjustment, if needed after replacement of part, with the mechanism and its PWB in position in the main frame.
(1) Start and end sensors: Q701 and Q702
Insert the sensor’s projection deep into the upper hole of the holder. Referring to the PWB, fix the sensors tight
enough.
(2) Photocoupler: IC901
Refer to the symbol on the PWB and the anode marking of the part.
(3) Cam switches A and B: S704: QSW-RA001WJZZ.
Adjust the notch of the part to the white marker of the symbol on the PWB. Do not allow any looseness.
(4) Take-up and supply sensors: D707 and D706.
Be careful not to confuse the setting direction of the parts in reference to the symbols on the PWB. Do not allow any
looseness.
5
VC-A565U/H965U
1. GENERAL INFORMATION
1-1 FEATURES
Only for VC-H965U
•Hi-Fi Stereo Sound
• Built-in MTS (Multi-channel TV Sound) Decoder
• Built-in Front AV Jacks
Common Features
• EZ Set Up
• S-VHS Quasi Playback
• Double-Azimuth 4-Heads
•19
µClear Picture System (in EP mode)
• HQ System for Better Resolution and Color Reproduction
• Multi-Language (English/Spanish/French) OSD (On Screen
Display) with Menu Screen Guidance
• 181-channelPLLQuartzSynthesizedRandomAccess Tuner
with Automatic Channel Setting
• Quick Start with Full Loading Mechanism
• 1-Year, 8 Event Programmable Timer
• Simple Recording Timer
• Universal Remote Control
• Sharp Super Picture
• 5 sec. Timer Backup
• Field-Still/Variable Slow/Frame Advance
• Real-Time Counter (On Screen Display)
• Automatic Daylight Saving-Time (D.S.T.) Adjustment
• Blue Screen Noise Elimination
• Auto Tracking Control System
• Digital Program Search System (DPSS)
• Skip Search
• Instant Replay
• Auto Zero Back
• Recorded Section Auto Repeat
• Full Automatic Playback
• Tamper Proof
• Up to 8 Hours of Recording and Playback (with T-160
cassette)
1-2 SPECIFICATIONS
Format: VHS NTSC Standard
Video Recording System: Rotary Two-Head Helical Scan System
Number of Video Heads: 4
Video Signal Standard: NTSC Color System
Audio Recording System: 1 Stationary Head for Linear Audio
2 Rotary Heads for Hi-Fi stereo (Only for Hi-Fi models)
Tape Width: 12.7 mm (1/2 inch)
Tape Speed: (SP) 33.35 mm/sec. (1.31 i.p.s.)
(LP) 16.67 mm/sec. (0.66 i.p.s.) (playback only)
(EP) 11.12 mm/sec. (0.44 i.p.s.)
Maximum Recording Time: (SP) 160 min. (T-160)
(EP) 480 min. (T-160)
Channel Coverage: VHF 2-13
UHF 14-69
CATV 1-125
Antenna Input: 75 Ohm
Video Input: 0.5 to 2.0 Vp-p, 75 Ohm unbalanced
Video Output: 1.0 Vp-p, 75 Ohm unbalanced
Audio Input: –8 dBs, 47 kOhm unbalanced (0 dBs = 0.775 Vrms)
Audio Output: –8 dBs, 1 kOhm unbalanced (0 dBs = 0.775 Vrms)
Hi-Fi Audio (Only for Hi-Fi models):
Dynamic Range:
90 dB
Frequency Response:
20 Hz-20 kHz
Memory Backup: 5 sec.
Operating Temperature: 5°C to 40°C (41°F to 104°F)
Storage temperature: –20°C to 60°C (–4°F to 140°F)
Power Source: 120 V AC, 60 Hz
Power Consumption: 14 W
Dimensions (approx.): 360 (W) x 92.0 (H) x 232 (D) mm (14-3/16" x 3-10/16" x 9-9/64")
Weight (approx.): 2.3 kg (5.1 lbs)
Accessories included: 75 ohm coaxial cable, Operation manual, Infrared remote control, Battery (2 pcs.)
Note: Specifications are subject to change without notice.
6
VC-A565U/H965U
1-3 LOCATION OF MAJOR COMPONENTS AND CONTROL
Cassette compartment (see Playback/Recording)
POWER button
(When pressed to turn on the VCR, POWER LED indicator
will light up. When the power is turned off. POWER LED
indicator wil turn off.)
Basic function controls
(see Playback/Recording)
(VC-H965U)
7
VC-A565U/H965U
2. DISASSEMBLY AND REASSEMBLY
2-1 DISASSEMBLY OF MAJOR BLOCKS
TOP CABINET : Remove 2 screws 1.
FRONT PANEL : Remove 2 screws 2and 7 clips 3.
OPERATION : Remove 1 screw 4.
PWB
SHIELD ANGLE : Remove 1 screw 5with shield angle.
MECHANISM/ : Remove 1 screw 6, 2 screws 7.
MAIN PWB Remove 1 screw 8with antenna
terminal cover. Remove 1 screw 9
with top cabinet fix angle.
ANTENNA
TERMINAL
COVER
MAIN FRAME
TOP CABINET
TOP CABINET
FIX ANGLE
OPERATION PWB
LED HOLDER
MECHANISM/
MAIN PWB
ASSEMBLY
ANTENNA
TERMINAL
COVER
FRONT AV
JACK
8
8
1
C
262
6
6
9
4
B
B
B
B
AA
A
B
A
7
7
C
A
VC-A565U
VC-H965U
VC-H965U
VC-H965U
VC-A565U
Front Panel
B
3
3
VC-H965U
Front Panel
B
3
3
8
VC-A565U/H965U
VC-H965U
VC-H565U
MECHANISM CHASSIS
2-2 DISASSEMBLING THE MECHANISM/MAIN PWB ASSEMBLY
1. When removing the mechanism from the main PWB,
remove the antenna cover 1 screw 1, and remove the
antenna terminal cover.
Remove the screw 2which connecting the PWB and
the mechanism.
Take out vertically the mechanism so that it does not
damage the adjacent parts.
2. Removing the mechanism and cassette housing.
Remove 2 screws 3fixing the cassette housing to the
mechanism, and remove the cassette housing.
3
CASSETTE
HOUSING
MAIN PWB
1
2
9
VC-A565U/H965U
2-3 CARES WHEN REASSEMBLING
INSTALLING THE CASSETTE HOUSING
When the cassette housing is installed on the mechanism,
the initial setting is essential condition.
There are two initial setting methods, namely electrical and
mechanical.
1. Electrical initial setting
So as to perform initial setting of mechanism execute the
Step 1 of Installation of cassette housing. After ascertaining
the return to the initial setting position install the cassette
housing. (Conditions: When mechanism and PWB have
been installed)
2. Mechanical initial setting
After ascertaining the return to the initial set position install
the cassette housing in the specified position. (This method
is applied only for the mechanism.)
INSTALLING THE MECHANISM ON PWB
Lower vertically the mechanism, paying attention to the
mechanism edge, and install the mechanism with due care
so that the parts are not damaged. So as to fix the mecha-
nism to the main PWB install two housings. (Fit the antenna
cover to one of them.
PARTS WHICH NEED PARTICULAR CARE
When installing the mechanism chassis on the PWB unit,
take care so as to prevent deformation due to contact of
mechanism chassis with REC TIP SW.
Master cam
Push up
Drive lever
DRUM CONNECTOR
AE CONNECTOR
END SENSOR
VC-H965U
VC-H565U
END TIP SW
AC HEAD CONNECTOR
START SENSOR
10
VC-A565U/H965U
3. FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW)
No. Function No. Function
1 Full erase head
2 Supply pole base ass’y
3 Tension arm
4 Idler wheel ass’y
5 Open guide
6 Supply reel disk
7 Supply main brake
8 Take-up main brake
9 Pinch drive cam
10 A/C head ass’y
11 Reverse guide lever ass’y
12 Reel relay gear
13 Take-up reel disk
14 Pinch roller lever ass’y
15 Drum ass'y
16 Loading motor block
17 Drum driver motor
18 Take-up pole base ass'y
17 15
11
5
9
14
12
8
16
13
4
6
2
7
3
1
18 10
Other manuals for VC-A565U
1
This manual suits for next models
1
Table of contents
Other Sharp VCR System manuals
Sharp
Sharp VC-A560UA User manual
Sharp
Sharp VC-AA370 User manual
Sharp
Sharp VC-A270X User manual
Sharp
Sharp VC-MH713HM User manual
Sharp
Sharp DV-NC150U User manual
Sharp
Sharp VC-H726X User manual
Sharp
Sharp VC-A565U User manual
Sharp
Sharp VC-MH780BM User manual
Sharp
Sharp VC-S2000HM Quick start guide
Sharp
Sharp WQ-T37OA User manual
Sharp
Sharp VC-M522HM User manual
Sharp
Sharp VC-S2000GM User manual
Sharp
Sharp DV-NC100S User manual
Sharp
Sharp VC-H9888U User manual
Sharp
Sharp VC-A560U User manual
Sharp
Sharp VC-S101U User manual
Sharp
Sharp VC-A240X User manual
Sharp
Sharp VC-A10 User manual
Sharp
Sharp VC-H600X User manual
Sharp
Sharp VC-MH711GM User manual
