SHARP VCA412UA, VC-H812U Service Manual
VC-A412U(A
VC-H812U(A)
SERVICE MANUAL
S20X1VCA412UA
VIDEO CASSETTE RECORDER
)
VC-A412U(A
MODELS
In the interests of user-safety (Required by safety regulations
in some countries) the set should be restored to its original
condition and only parts identical to those specified be used.
OUTLINE
This Service Manual containts the information of parts change required due to chage of country producing
the model VC-A412U/H812U(S10V4VC-A412U).
When servicing the model VC-A412U(A)/H812(A), please use the parts described in this Service Manual.
CONTENTS
1. GENERAL INFORMATION............................................................................................................... 3
1-1 FEATURES................................................................................................................................ 3
1-2 SPECIFICATIONS..................................................................................................................... 3
1-3 LOCATION OF MAJOR COMPONENTS AND CONTROL....................................................... 4
2. REPLACEMENT PARTS LIST ......................................................................................................... 5
3. EXPLODED VIEW OF MECHANICAL PARTS............................................................................... 13
4. PACKING OF THE SET.................................................................................................................. 17
VC-H812U(A
Page
)
)
SHARP CORPORATION
VC-A412U(A)/H812U(A)..... Models for USA
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
1
VC-A412U(A
VC-H812U(A)
)
IMPORTANT SERVICE NOTES
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, isolation resistor/capacitor networks, mechanical insulators 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
and 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 potential shock hazard which must be corrected before
returning the video cassette recorder to the owner.
SSVM
AC SCALE
1.5k ohms.
10W
0.15 µF
TEST PROBE
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
WARNING :TO REDUCE THE RISK OF FIRE OR ELEC-
TRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK. DO
CAUTION:
3.0A 125V
NOT REMOVE COVER. NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
This symbol warns the user of uninsulated voltage
within the unit that can cause dangerous electric shocks.
This symbol alerts the user that there are important
operating and maintenance instructions in the literature
accompanying this unit.
This symbol mark means fast operating fuse.
For continued protection against risk of fire, replace
only with same type fuse F901 (3.0A, 125V).
2
1. GENERAL INFORMATION
1-1 FEATURES
Only for VC-H812U
• Hi-Fi Stereo Sound
• Built-in MTS (Multi-channel TV Sound) Decoder
Common Features
• 400 Times Rewind Speed to Fast Forward and Rewind.
• EZ Set Up
• S-VHS Quasi Playback
• Double-Azimuth 4-Heads
• 19µ Clear 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-channel PLL Quartz Synthesized Random Access Tuner
with Automatic Channel Setting
• Quick Start with Full Loading Mechanism
• 1-Year, 8 Event Programmable Timer
• Simple Recording Timer
• Universal Remote Control
VC-A412U(A
VC-H812U(A)
• Sharp Super Picture
• Field-Still/Variable Slow/Frame Advance
• Real-Time Counter
• 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)
• Automatic Head Cleaning System
• Built in Front AV Jacks
)
1-2 SPECIFICATIONS
Format: VHS NTSC Standard
Video Recording System: Rotary, Slant Azimuth Two-Head Helical Scan
Number of Video Heads: 4
Video Signal Standard: NTSC Color System
Audio Recording System: 1 Stationary Head for Linear Audio
Tape Width: 12.7 mm (1/2 inch)
Tape Speed: (SP) 33.35 mm/sec. (1.31 i.p.s.)
Maximum Recording Time: (SP) 160 min. (T-160)
Channel Coverage: VHF 2-13
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, 47k Ohm unbalanced (0 dBs = 0.775 Vrms)
Audio Output: –8 dBs, 1k Ohm unbalanced (0 dBs = 0.775 Vrms)
Hi-Fi Audio (Only for Hi-Fi models):
Memory Backup: 60 seconds
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: 18 W
Weight: 2.8 kg (6.2 lbs)
Dimensions (approx.): 360 (W) x 92.5 (H) x 256 (D) mm (14-3/16 x 3-41/64x 10-5/64 inch)
Accessories included: 75 ohm coaxial cable, Operation manual, Infrared remote control, Battery (2 pcs.),
Note: Specifications are subject to change without notice.
2 Rotary Heads for Hi-Fi stereo (Only Hi-Fi models)
(LP) 16.67 mm/sec. (0.66 i.p.s.) (playback only)
(EP) 11.12 mm/sec. (0.44 i.p.s.)
(EP) 480 min. (T-160)
UHF 14-69
CATV 1-125
Dynamic Range:
Frequency Response:
90 dB
20 Hz-20k Hz
Warranty Card
3
VC-A412U(A
VC-H812U(A)
)
1-3 LOCATION OF MAJOR COMPONENTS AND CONTROL
4
VC-A412U(A
VC-H812U(A)
Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code
)
2. PARTS LIST
PARTS REPLACEMENT
Many electrical and mechanical parts in video cassette recorder have
special safety-related characteristics. These characteristics are often
not evident from visual inspection nor can the protection afforded by
them necessarily be obtained by using replacement components rated
for higher voltage, wattage, etc. Replacement parts which have these
special safety characteristics are identified in this manual; electrical
components having such features are identified by " å " and shaded
areas in the Replacement Parts Lists and Schematic Diagrams.
The use of a substitute replacement part which does not have the same
safety characteristics as the factory recommended replacement parts
shown in this service manual may create shock, fire or other hazards.
"HOW TO ORDER REPLACEMENT PARTS"
To have your order filled promptly and correctly, please furnish
the following informations.
1. MODEL NUMBER 2. REF. NO.
3. PART NO. 4. DESCRIPTION
In USA: Contact your nearest SHARP Parts Distributor to order.
For location of SHARP Parts Distributor,
Please CallToll-free;
1-800-BE-SHARP
HOW TO IDENTIFY CHIP
TRANSISTORS AND
DIODES BY ITS MARKING
(1)
(3)
(2)
Marking
(1) Base/Input
(2) Emitter/Ground
(3) Collector/Output
2. LISTE DES PIECES
CHANGE DES PIECES
De nombreuses pièces électriques et mécaniques de magnétoscopes présentent des caractéristiques particulières de sécurité.
Ces caractéristiques ne sont pas toujours évidentes à l’inspection
visuelle et la protection qu’elles assurent ne peut pas toujours être
obtenue par des pièces de rechange étalonnées à un régime de
tension, une puissance, etc. superieurs. Les pièces de rechange qui
présentent ces caractéristiques spéciales de sécurité, sont identifiées
dans ce manuel: les pièces électriques qui présentent ces particularités,
sont repérée par la marque " å " et sont hachurées dans les listes de
pièces et dans les diagrammes schématiques.
La substitution d’une pièce de rechange par une autre qui ne présente
pas les mêmes caractéristiques de sécurité que la pièce recommandée
par l’usine et repérée dans ce manuel de service, peut provoquer une
électrocution, un incendie ou tout autre sinistre.
"COMMENT COMMANDER LES PIECES DE RECHANGE"
Pour que votre commande soit rapidement et correctement remplie,
veuillez fournir les renseignements suivants.
1. NUMERO DU MODELE 2. NO. DE REF
3. NO. DE PIECE 4. DESCRIPTION
In CANADA: Contact Sharp Electronics of Canada Limited
Phone (416) 890-2100
★MARQUE: SECTION LIVRAISON DES PIECES DE RECHANGE
Ref. No. Part No. ★ Description Code
DUNTK5845TEVG (VC-A412U(A))
DUNTK5845TEVA (VC-H812U(A))
MAIN UNIT
TUNER
TU101 VTUENG56712G1 V Tuner BE
Fig.1
Package Marking Parts No.
Fig. 1 TR/TS VS2SA1530ARS1
Fig. 1 LE/LF VS2SC3052EF-1
Fig. 1 PD VSKRA104S//-1
Fig. 1 NC VSKRA103S//-1
MARK★: SPARE PARTS-DELIVERY SECTION
Ref. No. Part No. ★ Description Code
PRINTED WIRING BOARD ASSEMBLYS
(NOT REPLACEMENT ITEM)
DUNTK5845TEVA – Main Unit (VC-H812U(A)) —
DUNTK5845TEVG – Main Unit (VC-A412U(A)) —
DUNTK5846TEV4 – Operation Unit —
IC201 VHiHA8317NF-1 V HA118317NF AZ
IC601 VHiBA7755A/-1 V BA7755A AE
IC651 VHiAN3662FB-1 V
IC701 RH-iX1566GEZZ J I.C. AY
IC702 VHiPST600H/-1 V PST600H-2 AE
IC706 VHiLB1988//-1 V LB1988 AQ
IC801 VHiMN12511/-1 V MN12511 AQ
IC901 RH-FX0034CEZZ V PC817 AE
IC903 VHiKiA431//-1 V KIA431 AE
AN3662FBP (VC-H812U(A))
TRANSISTORS
INTEGRATED CIRCUITS
Q251 VS2SA1530ARS1 V 2SA1530ARS AC
Q302 VS2SD1306-E1E V 2SD1306 AD
Q306 VS2SA1530ARS1 V 2SA1530ARS AC
Q501 VS2SC3052EF-1 V 2SC3052 (VC-H812U(A) ) AC
Q602 VS2SD1859TV-1 V 2SD1859TV AD
Q603 VS2SC3052EF-1 V 2SC3052EF AC
Q651 VS2SD1306-E1E V 2SD1306 (VC-H812U(A) ) AD
Q652 VS2SD1306-E1E V 2SD1306 (VC-H812U(A) ) AD
Q653 VSKRA104S//-1 V KRA104S (VC-H812U(A) ) AA
Q654 VSKRC103S//-1 V KRC103S (VC-H812U(A) ) AA
Q656 VSKRC103S//-1 V KRC103S (VC-H812U(A) ) AA
Q701 RH-PX0233GEZZ J PT493Fl2 AD
Q702 RH-PX0233GEZZ J PT493Fl2 AD
Q704 VS2SA1530ARS1 V 2SA1530ARS AC
Q705 VS2SC3052EF-1 V 2SC3052EF AC
5
AZ
VC-A412U(A
)
VC-H812U(A)
Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code
Q706 VS2SA1530ARS1 V 2SA1530ARS AC
Q710 VS2SC3052EF-1 V 2SC3052EF AC
Q711 VS2SC3052EF-1 V 2SC3052EF AC
å Q901 VS2SC4161//1E V 2SC4161 AL
å Q902 VS2SC3576AC-1 V 2SC3576AC AC
Q951 VS2SA1271-Y-1 V 2SA1271-Y AB
Q952 VSKRC103S//-1 V KRC103S AA
Q963 VS2SA1530ARS1 V 2SA1530ARS AC
Q981 VS2SA1271-Y-1 V 2SA1271-Y AB
Q982 VSKRC103S//-1 V KRC103S AA
Q991 VS2SC3203Y/-1 V 2SC3203Y AB
Q992 VS2SA1530ARS1 V 2SA1530ARS AC
Q993 VSKRC103S//-1 V KRC103S AA
DIODES
D351 VHD1SS119//-1 V Diode (VC-H812U(A)) AB
D701 RH-PX0270GEZZ J LED, Cassette AC
D702 VHD1SS119//-1 V Diode AB
D706 RH-PX0252GEZZ J GP1S563 Sup Reel Sensor AF
D707 RH-PX0252GEZZ J GP1S563 TU Reel Sensor AF
D708 RH-PX0238GEZZ J RPI-352S Cam SW A AF
D709 RH-PX0238GEZZ J RPI-352S Cam SW B AF
D712 VHD1SS119//-1 V Diode AB
D715 VHD1SS119//-1 V Diode AB
D716 VHD1SS119//-1 V Diode AB
å D901 VHDRL1N4004-1 V Diode AD
å D902 VHDRL1N4004-1 V Diode AD
å D903 VHDRL1N4004-1 V Diode AD
å D904 VHDRL1N4004-1 V Diode AD
å D905 VHD10ELS4//-1 V Diode AD
å D907 VHD1SS119//-1 V Diode AB
å D912 RH-EX0601GEZZ J Zener Diode AA
å D913 VHD1SS119//-1 V Diode AB
å D921 VHD10ELS4//-1 V Diode AD
å D922 VHD10ELS4//-1 V Diode AD
å D923 VHD15DF1FC/1E V Diode AD
å D924 VHD10ELS4//-1 V Diode AD
å D926 VHD10ELS4//-1 V Diode AD
å D928 VHDD1NS4///-1 V Diode AE
D951 RH-EX0677GEZZ J Zener Diode AB
D952 RH-EX0601GEZZ J Zener Diode AA
D991 RH-EX0631GEZZ J Zener Diode AA
D992 VHD1SS119//-1 V Diode AB
PACKAGED CIRCUITS
X501 RCRSB0265GEZZ J Crystal AH
X701 RCRSB0205GEZZ J Crystal AM
L101 VP-CF101K0000 V Peaking 100µH AB
L201 VP-XF820K0000 V Peaking 82µH AB
L301 VP-2K101K0000 V Peaking 100µH AC
L351 VP-2K101K0000 V Peaking 100µH AC
(VC-H812U(A))
L503 VP-XF120K0000 V Peaking 12µH AB
L602 VP-DF221K0000 V Peaking 220µH AB
å L901 RCiLF0312GEZZ J Coil AE
å L921 RCiLP0147GEZZ J Coil AC
å L922 RCiLP0147GEZZ J Coil AC
TRANSFORMERS
T601 RTRNH0098GEZZ J Osc. Transformer AE
å T901 RTRNZ0048AJZZ V Transformer AQ
CONTROL
R701 RVR-M4343GEZZ J 100k PG MM AB
CAPACITORS
C101 VCKYCY1HB221K V 220p 50V Ceramic AA
C102 VCCCCY1HH101J V 100p 50V Ceramic AA
(VC-A412U(A))
C103 VCEA9M0JW107M V 100 6.3V Electrolytic AB
C105 VCEA0A0JW108M V 1000 6.3V Electrolytic AC
C106 VCKYCY1HF103Z V 0.01 50V Ceramic AA
C142 VCEA9M0JW107M V 100 6.3V Electrolytic AB
(VC-H812U(A))
C143 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
(VC-H812U(A))
C145 VCEA9M1HW335M V 3.3 50V Electrolytic AB
(VC-H812U(A))
C148 VCKYCY1HF103Z V 0.01 50V Ceramic AA
(VC-H812U(A))
C160 VCEA9M1HW225M V 2.2 50V Electrolytic AB
(VC-H812U(A))
C161 VCKYCY1CB104K V 0.1 16V Ceramic AB
(VC-H812U(A))
C162 VCKYCY1CB473K V 0.047 16V Ceramic AA
(VC-H812U(A))
C163 VCEA9M1HW474M V 0.47 50V Electrolytic AB
(VC-H812U(A))
C164 VCKYCY1CB104K V 0.1 16V Ceramic AB
(VC-H812U(A))
C165 VCKYCY1CB104K V 0.1 16V Ceramic AB
(VC-H812U(A))
C166 VCKYCY1CB273K V 0.027 16V Ceramic AA
(VC-H812U(A))
C167 VCKYCY1CB104K V 0.1 16V Ceramic AB
(VC-H812U(A))
C168 VCEA9M1CW106M V 10 16V Electrolytic AB
(VC-H812U(A))
C169 VCEA9M1HW105M V 1.0 50V Electrolytic AB
(VC-H812U(A))
C170 VCFYHA1HA124J V 0.12 50V AB
(VC-H812U(A))
C201 VCEA9M0JW107M V 100 6.3V Electrolytic AB
C202 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C203 VCCCCY1HH151J V 150p 50V Ceramic AA
C204 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C205 VCCCCY1HH470J V 47p 50V Ceramic AA
C206 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C207 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C208 VCEA9M1CW106M V 10 16V Electrolytic AB
C209 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C210 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C211 VCEA9M1HW335M V 3.3 50V Electrolytic AB
C212 VCEA9M1CW106M V 10 16V Electrolytic AB
C213 VCEA9M1HW225M V 2.2 50V Electrolytic AB
C214 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C215 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C216 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C217 VCEA9M0JW107M V 100 6.3V Electrolytic AB
C218 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C219 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C220 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C221 VCEA9M1CW106M V 10 16V Electrolytic AB
C223 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C226 VCEA9M0JW107M V 100 6.3V Electrolytic AB
C227 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C228 VCEA9M0JW107M V 100 6.3V Electrolytic AB
C251 VCEA9M1CW476M V 47 16V Electrolytic AB
C252 VCEA0A0JW337M V 330 6.3V Electrolytic AC
C254 VCCCCY1HH330J V 33p 50V Ceramic AA
C256 VCKYCY1CF104Z V 0.1 16V Ceramic AA
C301 VCEA9M0JW107M V 100 6.3V Electrolytic AB
C302 VCKYCY0JF105Z V 1.0 6.3V Ceramic AB
C303 VCKYCY1HB102K V 1000p 50V Ceramic AA
C304 VCKYCY1HB102K V 1000p 50V Ceramic AA
C305 VCKYCY1HB102K V 1000p 50V Ceramic AA
C306 VCKYCY1HB102K V 1000p 50V Ceramic AA
C307 VCKYCY1HB102K V 1000p 50V Ceramic AA
C308 VCKYCY1HB102K V 1000p 50V Ceramic AA
C309 VCKYCY1HB102K V 1000p 50V Ceramic AA
C310 VCKYCY1HB102K V 1000p 50V Ceramic AA
C311 VCKYCY1HF103Z V 0.01 50V Ceramic AA
C312 VCKYCY1HF103Z V 0.01 50V Ceramic AA
C319 VCCCCY1HH100D V 10p 50V Ceramic AA
C320 VCCCCY1HH100D V 10p 50V Ceramic AA
C327 VCKYCY1HB102K V 1000p 50V Ceramic AA
C329 VCKYCY1HF103Z V 0.01 50V Ceramic AA
C351 VCEA9M0JW107M V 100 6.3V Electrolytic AB
(VC-H812U(A))
6
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