Sharp VC-A565U Service Manual Download Page 68

Page: 68 / 78

Ref. No.

Part No.

★

Description

Code

Ref. No.

Part No.

★

Description

Code

VC-A565U/H965U

R105

VRD-RA2BE681J

V 680

1/8W

Carbon

R111

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R112

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R114

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-H965U)

R127

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R147

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R153

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

R154

VRS-CY1JF822J

V 8.2k 1/16W Metal Oxide

(VC-A565U)

R155

VRD-RA2BE102J

V 1k

1/8W

Carbon

R157

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-H965U)

R164

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R201

VRS-CY1JF682J

V 6.8k 1/16W Metal Oxide

R202

VRS-CY1JF182J

V 1.8k 1/16W Metal Oxide

R203

VRS-CY1JF822J

V 8.2k 1/16W Metal Oxide

R207

VRS-CY1JF102J

V 1k

1/16W Metal Oxide

R211

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R212

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R225

VRS-CY1JF750J

V 75

1/16W Metal Oxide

R227

VRS-CY1JF750J

V 75

1/16W Metal Oxide

R252

VRD-RA2EE331J

V 330

1/4W

Carbon

R253

VRS-CY1JF101J

V 100

1/16W Metal Oxide

R254

VRS-CY1JF183J

V 18k

1/16W Metal Oxide

R282

VRS-CY1JF750J

V 75

1/16W Metal Oxide

R285

VRD-RA2BE470J

V 47

1/8W

Carbon

R301

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

R351

VRD-RA2BE103J

V 10k

1/8W

Carbon

(VC-H965U)

R501

VRS-CY1JF681J

V 680

1/16W Metal Oxide

R502

VRS-CY1JF273J

V 27k

1/16W Metal Oxide

R504

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R601

VRS-CY1JF103J

V 10k

1/16W Metal Oxide

(VC-H965U)

R601

VRS-CY1JF822J

V 8.2k 1/16W Metal Oxide

(VC-A565U)

R602

VRS-CY1JF274J

V 270k 1/16W Metal Oxide

R603

VRS-CY1JF221J

V 220

1/16W Metal Oxide

R604

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

R605

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R606

VRS-CY1JF273J

V 27k

1/16W Metal Oxide

R609

VRS-CY1JF333J

V 33k

1/16W Metal Oxide

(VC-A565U)

R610

VRS-CY1JF183J

V 18k

1/16W Metal Oxide

(VC-A565U)

R611

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

(VC-H965U)

R611

VRS-CY1JF393J

V 39k

1/16W Metal Oxide

(VC-A565U)

R612

VRS-CY1JF104J

V 100k 1/16W Metal Oxide

(VC-H965U)

R612

VRS-CY1JF123J

V 12k

1/16W Metal Oxide

(VC-A565U)

R613

VRS-CY1JF393J

V 39k

1/16W Metal Oxide

(VC-A565U)

R614

VRS-CY1JF123J

V 12k

1/16W Metal Oxide

(VC-A565U)

R615

VRD-RA2BE472J

V 4.7k 1/8W

Carbon

(VC-A565U)

R619

VRS-CY1JF470J

V 47

1/16W Metal Oxide

R620

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R621

VRD-RA2EE4R7J

V 4.7

1/4W

Carbon

R622

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-H965U)

R623

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

R624

VRS-CY1JF472J

V 4.7k 1/16W Metal Oxide

R625

VRS-CY1JF222J

V 2.2k 1/16W Metal Oxide

R626

VRS-CY1JF101J

V 100

1/16W Metal Oxide

R627

VRS-CY1JF392J

V 3.9k 1/16W Metal Oxide

R635

VRS-CY1JF472J

V 4.7k 1/16W Metal Oxide

R636

VRD-RA2BE561J

V 560

1/8W

Carbon

R653

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

(VC-H965U)

R654

VRS-CY1JF682J

V 6.8k 1/16W Metal Oxide

(VC-H965U)

R655

VRD-RA2BE473J

V 47k

1/8W

Carbon

(VC-H965U)

R656

VRS-CY1JF682J

V 6.8k 1/16W Metal Oxide

(VC-H965U)

R657

VRS-CY1JF681J

V 680

1/16W Metal Oxide

(VC-H965U)

R658

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

(VC-H965U)

R663

VRD-RA2BE473J

V 47k

1/8W

Carbon

(VC-H965U)

R664

VRS-CY1JF682J

V 6.8k 1/16W Metal Oxide

(VC-H965U)

R665

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

(VC-H965U)

R666

VRS-CY1JF682J

V 6.8k 1/16W Metal Oxide

(VC-H965U)

R667

VRD-RA2BE681J

V 680

1/8W

Carbon

(VC-H965U)

R668

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

(VC-H965U)

R671

VRS-CY1JF103J

V 10k

1/16W Metal Oxide

(VC-H965U)

R672

VRS-CY1JF151J

V 150

1/16W Metal Oxide

(VC-H965U)

R673

VRS-CY1JF151J

V 150

1/16W Metal Oxide

(VC-H965U)

R674

VRD-RA2BE473J

V 47k

1/8W

Carbon

(VC-H965U)

R675

VRS-CY1JF183J

V 18k

1/16W Metal Oxide

(VC-H965U)

R676

VRS-CY1JF102J

V 1k

1/16W Metal Oxide

(VC-H965U)

R677

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

(VC-H965U)

R678

VRS-CY1JF273J

V 27k

1/16W Metal Oxide

(VC-H965U)

R685

VRS-CY1JF272J

V 2.7k 1/16W Metal Oxide

(VC-H965U)

R686

VRS-CY1JF272J

V 2.7k 1/16W Metal Oxide

(VC-H965U)

R690

VRS-CY1JF102J

V 1k

1/16W Metal Oxide

(VC-H965U)

R691

VRD-RA2BE102J

V 1k

1/8W

Carbon

(VC-H965U)

R702

VRS-CY1JF102J

V 1k

1/16W Metal Oxide

R703

VRS-CY1JF103J

V 10k

1/16W Metal Oxide

R704

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R705

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R707

VRS-CY1JF474J

V 470k 1/16W Metal Oxide

R708

VRS-CY1JF332J

V 3.3k 1/16W Metal Oxide

R709

VRS-CY1JF222J

V 2.2k 1/16W Metal Oxide

R710

VRS-CY1JF822J

V 8.2k 1/16W Metal Oxide

R712

VRD-RA2BE822J

V 8.2k 1/8W

Carbon

(VC-A565U)

R713

VRS-CY1JF102J

V 1k

1/16W Metal Oxide

R714

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

R715

VRS-CY1JF472J

V 4.7k 1/16W Metal Oxide

R716

VRS-CY1JF182J

V 1.8k 1/16W Metal Oxide

R717

VRS-CY1JF123J

V 12k

1/16W Metal Oxide

R718

VRS-CY1JF563J

V 56k

1/16W Metal Oxide

R719

VRS-CY1JF183J

V 18k

1/16W Metal Oxide

R721

VRS-CY1JF563J

V 56k

1/16W Metal Oxide

R728

VRS-CY1JF332J

V 3.3k 1/16W Metal Oxide

R731

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

R738

VRS-CY1JF103J

V 10k

1/16W Metal Oxide

R739

VRD-RA2BE102J

V 1k

1/8W

Carbon

R741

VRS-CY1JF123J

V 12k

1/16W Metal Oxide

R742

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

R743

VRS-CY1JF563J

V 56k

1/16W Metal Oxide

R744

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

R745

VRD-RA2BE102J

V 1k

1/8W

Carbon

R746

VRS-CY1JF182J

V 1.8k 1/16W Metal Oxide

R747

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R748

VRS-CY1JF681J

V 680

1/16W Metal Oxide

R750

VRD-RA2BE473J

V 47k

1/8W

Carbon

R751

VRD-RA2BE562J

V 5.6k 1/8W

Carbon

R752

VRD-RA2BE103J

V 10k

1/8W

Carbon

Summary of Contents for VC-A565U

Page 1: ...al 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 REPLACE...

Page 2: ...ic 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...

Page 3: ...couvercles de compartiment et ajustement ou les boucliers les réseaux de résistance condensateur d isolement Ies isolateurs mécaniques etc 3 Pour être sûr qu il n y a aucun risque de choc électrique vérifier le courant de fuite de la maniére suivante Brancher le cordon d alimentation secteur directement dans une prise de courant de 120 volts Ne pas utiliser de transformateur d isolement pour cet e...

Page 4: ...h 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 ...

Page 5: ... 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 s...

Page 6: ...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 ...

Page 7: ... MECHANISM Remove 1 screw 6 2 screws 7 MAIN PWB Remove 1 screw 8 with 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 2 6 2 6 6 9 4 B B B B A A A B A 7 7 C A VC A565U VC H965U VC H965U VC H965U VC A565U Front Panel ...

Page 8: ...a cover 1 screw 1 and remove the antenna terminal cover Remove the screw 2 which 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 3 fixing the cassette housing to the mechanism and remove the cassette housing 3 CASSETTE HOUSING MAIN PWB 1 2 ...

Page 9: ...ing 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 housi...

Page 10: ...ler 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 ...

Page 11: ... H965U FUNCTION OF MAJOR MECHANICAL PARTS BOTTOM VIEW No Function No Function 19 Syncro Gear 20 Master cam 21 Capstan D D motor 22 Reel belt 23 Clutch lever 24 Limiter pulley ass y 25 Shifter 25 24 21 22 19 20 23 ...

Page 12: ...iGTH0006 AW JiGRH0002 BR JiGSG2000 BS JiGSG0300 BF 7 JiGADP003 BK Tension Gauge These Jigs are used for checking and adjusting the reel disk height When fixing any part to the threaded hole using resin with screw use the jig Specified torque 5 kg This cassette torque meter is used for check ing and adjusting the torque of take up for measuring tape back tension These Jigs are used for checking and...

Page 13: ...rmal rotation or significant vibration requires replacement Clean tape contact part with the specified cleaning liquid Clean tape contact area with the specified cleaning liquid Clean rubber and rubber contact area with the specified cleaning liquid Screen swaying Cassette not loaded or unloaded No tape running tape slack Tape slack Video head cleaning procedure 1 Apply one drop of cleaning liquid...

Page 14: ...TTE HOUSING CONTROL ASSEMBLY 1 Remove the full surface panel 2 Short circuit between TP803 and TP802 3 Plug in the power cord 4 Turn off the power switch The pole bases move into U L position 5 Open the lid of a cassette tape by hand 6 Hold the lid with two pieces of vinyl tape 7 Set the cassette tape in the mechanism chassis 8 Stabilize the cassette tape with a weight 500g to prevent floating 9 T...

Page 15: ... grease does not adhere the brake surface 2 After reassembly check the video search rewind back tension see 4 10 and check the brake torque see 4 14 Height checking and adjustment Note 1 Set the master plane with due care so that it does not contact the drum 2 When putting the master plane shift the reverse guide a little in the loading direction Care must be taken since excessive shift results in...

Page 16: ...r short circuiting between TP803 and TP802 provided at operation PWB plug in the power cord Setting 1 Set a torque gauge to zero on the scale Place it on the take up reel disk 2 Press the FF button 3 To calculate the remaining capacity of the play back mode slowly rotate the supply reel disk and then shift it into the forward mode Checking 1 Turn the torque gauge slowly one rotation every 2 to 3 s...

Page 17: ...wise very slowly one rotation every 1 to 2 seconds and check that the torque is within the set value change to 14 1 3 5mN m 144 35gf cm Set value EP change to 6 9 mN m 70 gf cm Figure 4 8 Checking 1 Make sure that value is within the setting 6 9 mN m 70 gf cm 2 The winding up torque fluctuates due to variation of rotation torque of limiter pulley ass y Read the center value of fluctuation as setti...

Page 18: ... VIDEO SEARCH REWIND BACK TENSION Remove the cassette housing control assembly After short circuiting between TP803 and TP802 provided at operation PWB plug in the power cord Checking 1 After pressing the play button press the rewind button and set the video search rewind mode 2 Place the torque gauge on the take up reel disk and turn it counterclockwise very slowly one rotation every 2 to 3 secon...

Page 19: ...g control assembly After short circuiting between TP803 and TP802 provided at operation PWB plug in the power cord Setting 1 Turn off the power switch 2 Open the torque cassette meter and fix with tape 3 Set the cassette tape in loading state 4 Put the weight 500g on the cassette torque meter 5 Turn on the power switch Make the adjustment with the beginning of a T 120 tape Figure 4 16 Figure 4 17 ...

Page 20: ... torque at the supply side and the take up side Unless the supply side brake torque or take up side brake torque is within the setting clean the felt surface of reel disk supply take up brake lever check again the brake torque If value cannot be set within the setting yet replace the main brake ass y or main brake spring Figure 4 18 4 14 CHECKING THE BRAKE TORQUE Checking the brake torque at the s...

Page 21: ...e PWB fitted to the A C head Notes 1 When replacing never touch the head If you touched clean with the cleaning liquid 2 When removing the screw 3 take care so that the spring may out Figure 4 23 Note 1 If the screw 1 is tighten tentatively too loose the azimuth and height of A C head may change when they are finally tightened Therefore care must be taken 2 After completion of A C head be sure to ...

Page 22: ...r so that the envelope waveform changes nearly parallel For ATR signal adjustment procedure refer to Figure 4 30 9 Turn the tilt screw to remove the tape crease at the fixing guide flange Playback the tape and check for tape crease at the fixing guide flange 1 If there is no tape crease Turn the tilt screw clockwise so that tape crease appears once at the flange and then return the tilt screw so t...

Page 23: ...The adjustment of 3 and 4 twice or three times repeat and finally adjust 4 Figure 4 27 For X value adjustment Adjust the X value turning the gear type screwdriver Figure 4 28 3 Tape run adjustment 1 Connect the oscilloscope to PB ATR signal output test point set oscilloscope sync to EXT trigger input the PB CHROMA signal head switching pulse 2 Rough adjustment of X value Tentatively fix A C head a...

Page 24: ...ecorded tape and check the flatness of ATR signal waveform and sound Notes When the A C head X value adjustment is performed be sure to perform at first X value rough adjustment refer to 4 17 3 2 PB ATR Signal Head switching pulse Figure 4 29 4 A C head X value adjustment 1 Fix A C head arm screws 1 by the method described in 4 15 Replacement 3 2 Playback the alignment tape VROATSV and shortcircui...

Page 25: ...s y 5 After installation adjust the playback switching point for adjustment of servo circuit 4 18 REPLACEMENT OF THE CAPSTAN D D DIRECT DRIVE MOTOR Remove the mechanism from the main PWB refer to 2 2 item 1 When removing the mechanism from the main PWB Removal Follow the order of indicated numbers 1 Remove the reel belt 1 2 Remove the slow brake lever 2 3 Remove the three screws 3 Reassembly 1 Tak...

Page 26: ...eplace ment 2 Remove the drum earth brush ass y 2 3 Remove the upper and lower drum assembly from main chassis 1 4 Remove the drum FFC holder 3 Cares when replacing the drum 1 Be careful so that the drum earth brush is not lost 2 Do not touch directly the drum surface 3 Fit gently the screwdriver to the screws 4 Since the drum assembly is an extremely precise as sembly it must be handled with utmo...

Page 27: ... Fix the shifter position setting part to the roading arm T position setting part as shown in figure 3 Make sure tension arm not run on the shifter as shown in figure a b c Loading arm T Shifter Insert point Loading arm T Loading arm S Phase matting Not run on the sifter Sifter Tension arm Drum Limiter pully Capstan D D motor Bottom side of mechanism chassis ...

Page 28: ... install the replacement loading motor as shown below Figure 4 40 Figure 4 38 2 The loading motor pressing in must be less than 14 7 N 1 500 gf Adjust the distance between motor and pulley to 6 95 mm Figure 4 38 1 Figure 4 39 0 2 0 15 E ring Line of synchro gear Phase matching Phase matching Hole of Pinch drive cam Synchro gear Master cam 6 95 mm A part Worm gear 0 0 15 Loading motor To press the ...

Page 29: ...rm R Drive Arm L Upper Plate 4 25 ASSEMBLY OF CASSETTE HOUSING 1 Proof lever Proof lever spring and Holder R Figure 4 41 MSPRD0215AJFJ Proof lever spring fixing direction designated LANGF9661AJFW Top surface should be free from scratches or soil ...

Page 30: ...ideo heads Check that the mechanism and all electric components are in good working condition prior to the adjustments otherwise adjustments cannot be completed Instruments required Color TV monitor Dual trace oscilloscope Audio signal generator AC milli voltmeter Blank video cassette tape Alignment tape VROEFZHS Screwdriver for adjustment Color bar generator RF signal generator TP201 204 Figure 5...

Page 31: ...t the leading edge of the head switching pulse is 6 0H lines ahead of the vertical sync as shown in Figure 5 2 6 If the setting is out of this range readjust the data using the channel select and buttons of the set or the remote controller 7 Finally press the STOP button to quit the test mode Figure 5 2 6 0 0 5H lines CH 1 HEAD SWITCHING PULSE CH 2 VIDEO OUT CH 1 1V dev 50µsec dev CH 2 1V dev 50µs...

Page 32: ...ns in reverse direction and master cam counterclockwise CASSETTE INSERTION STOP Cassette inserting Full loading YES YES YES NO NO NO Unloading Loading motor starts in normal direction and master cam counter clockwise Does mechanism position sw come off within 2 5 sec Are start end sensors at low level before cassette insertion Insert cassette Double action rack slides Drum motor starts Tape loadin...

Page 33: ...d Stop capstan motor NO YES Press STILL key Pinch roller releasing Idler swinging Pinch roller pressing Loading motor turns clockwise and master cam counterclockwise Turn capstan motor in reverse direction Turn loading motor counterclockwise Cam switch is at VSR position Set capstan motor to search speed Is take up reel sensor signal outputted Press REW key Release pinch roller Cam switch is at PU...

Page 34: ...ng motor stops End Loading motor turns in clockwise and master cam counterclockwise 4 supply reel pulses outputted Does the take up reel pulse output two edges Capstan motor turns clockwise Loading motor turns clockwise Cam switch is at Eject position Loading motor stops Capstan motor stops Press EJECT key Tape unloading Cassette eject End Capstan motor turns clockwise Capstan motor turns counterc...

Page 35: ... in trouble Does capstan motor turn in FF or REW direction Are idler wheel ass y and reel disk in mesh Is the pulse outputted from reel sensor The cassette tape is presumably damaged 2 REC PLAY FAILURE MODE RELEASE NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Is the master cam at PB position Does loading motor operate Modes changing smoothly through cam switch Loading motor control system ...

Page 36: ...sk in mesh Is supply reel disk winding torque normal Is pulse outputted from reel sensor Check main PWB YES YES YES YES YES NO NO NO NO NO YES YES NO NO YES Press REW key 4 i Unusual sound in cassette insertion and ejection mode Is unusal sound heard during cassette control running Unusual sound heard with pinch roller lever going up or down Is unusual sound heard during loading unloading Check pi...

Page 37: ... at reel disk Drive system out of contact with any part on main PWB Turn capstan motor by hand Unusual sound heard Check drive system s gears for damage Replace damaged gear with new one Reel disk Limiter pulley ass y Idler wheel ass y Check reel disk and main chassis And replace defective parts Adjust reel disk height Rearrange the parts on main PWB ...

Page 38: ...ut voltage fluctuates Check whether the secondary side photocoupler circuit operates normally Check the circuit and replace parts IC901 IC903 etc NO YES Check whether the primary side photocoupler output control functions normally Check the circuit and replace parts IC901 IC903 Q902 T901 etc NO YES Replace IC901 FLOW CHART NO 2 Fuse blown out Case 1 Case 2 Check for leak or short circuiting of pri...

Page 39: ...ne start sensor and all the way up thru to pin 67 of IC701 Check line pin 72 of IC701 and all the way up thru to pin 10 of P701 Replace loading motor Does pin 10 of P701 go from 2 5V to 4 2V when the cassette tape is inserted Does pin 67 of IC701 change from H to L level when the cassette tape is inserted Are start sensor shutter go to open when the cassette tape is inserted NO NO NO FLOW CHART NO...

Page 40: ...l H signal at pin 76 of IC701 change from L to H level Check IC701 Does the base of Q951 change from about 5 0V to 4 5V Check IC701 and all the way up thru to Q951 Is 5V sent out of the emitter of Q951 Check Q951 and the AT 5V line Check peripheral circuits for poor soldering FLOW CHART NO 11 The capstan motor fails to run Is the voltage more than about 2 6V DC given out of pin 24 of IC701 Check I...

Page 41: ...NO NO FLOW CHART NO 14 No head switching pulse See FLOW CHART NO 12 13 Is the drum motor rotating Is the drum PG FG signal present on pin 47 of IC701 Could be lines between P701 and IC701 Check peripheral circuit of P701 Is the drum PG FG signal present on pin 11 of P701 Replace IC701 Check or replace drum motor Check line between pin 11 of P701 and all the way up thru to pin 47 of IC701 Is drum P...

Page 42: ...O NO Check peripheral circuit of pin 41 of IC701 C715 C7716 and R708 Check drum PG FG signal line Is the head switching pulse at pin 18 of IC701 present NO See FLOW CHART NO 14 YES YES Is the drum error at pin 29 of IC701 present NO Replace IC701 YES YES Is the drum control voltage applied to pin 2 of IC701 YES Is pin 25 of IC701 in high impedance NO YES NO Check lines between pin 29 of IC701 and ...

Page 43: ...ERROR at pin 28 of IC701 Replace IC701 Replace A C head YES YES YES NO NO NO Is there CAP ERROR signal at pin 28 of IC701 NO NO NO Replace IC701 Does PB CTL signal appear at pin 58 of IC701 Replace IC701 Is there REC CTL signal output at pin 57 and 56 of IC701 Does PB CTL signal appear at pin 58 of IC701 Does A C head operate normally Adjust the height of the A C head Does the capstan FG signal ap...

Page 44: ... of IC701 Is picture signal output to the pin 38 of IC701 Check the line between pin 52 of IC201 and pin 40 of IC701 Check the line between pins 63 and 62 of IC201 and pins 64 and 65 of IC701 Is picture signal output to the emitter of video output buffer Q251 1 Line output Check Q251 periphery and output terminal periphery 2 RF output Check Q251 periphery and tuner pin 6 periphery Is 5V applied to...

Page 45: ...Check C212 Check between the pins 24 and 23 of IC201 Check C210 Is voltage 5V applied to the CCD section power terminal pin 36 of IC201 Is CCD control voltage approx 5V applied normally to the pin 37 from the pin 57 of IC201 Is clock signal approx 7 16 MHz 0 5 Vp p for CCD applied normally to the pin 44 from the pin 69 of IC201 Check the pins 13 and 14 of IC201 peripheral circuit R201 R202 C203 SP...

Page 46: ...luminance signal approx 0 5 Vp p input to the pin 39 of IC201 Check between the pin 39 and pin 26 of IC201 Check C212 Check between the pin 21 and pin 42 of IC201 Check C208 Check between the pin 18 and pin 19 of IC201 Check C206 Check between the pin 55 and pin 54 of IC201 Check C514 Check between the pins 79 and 78 of IC201 Is the luminance signal approx 0 25 Vp p input and output to the pins 13...

Page 47: ...d 57 of IC651 RF output terminal Is there audio signal outputted at pin 59 of IC651 Replace IC651 No Hi Fi E E sound heard pin 48 Hi Fi sound cannot be recorded E E mode is normal YES NO YES YES NO NO NO Is record FM signal output to the pins 21 to 24 ch 1 pins 21 and 22 ch 2 of IC651 Check the AH MZ connector Is the pin 29 of IC651 about 3 7V Check line of Hi Fi 5V Check Hi Fi REC CTL line Replac...

Page 48: ...justed properly Replace the AC head Readjust the A C head height Is audio signal output to the pin 11 of IC201 YES YES YES YES YES YES NO NO NO NO Is it possible to confirm the audio signal PB EQ on the pin 100 of IC201 Replace IC201 Is the pin 99 of IC201 in L level Check the line between the pin 11 of IC201 to the pin 62 of IC651 FLOW CHART NO 26 Check the periphery of pin 99 of IC201 ...

Page 49: ...49 VC A565U H965U M E M O ...

Page 50: ...VC A565U H965U VC A565U H965U 50 51 8 BLOCK DIAGRAM SYSTEM SERVO BLOCK DIAGRAM ...

Page 51: ...VC A565U H965U VC A565U H965U 52 53 SIGNAL FLOW BLOCK DIAGRAM A565U ...

Page 52: ...VC A565U H965U VC A565U H965U 54 55 SIGNAL FLOW BLOCK DIAGRAM A965U ...

Page 53: ...56 VC A565U H965U POWER CIRCUIT BLOCK DIAGRAM ...

Page 54: ...hms M 1 Meg ohm 2 All resistors are 1 8 watt unless otherwise noted 3 All capacitors µF unless otherwise noted P µµF Voltages and waveform are measured as follows DC voltages are measured with an SSVM placed between points indicated and chassis ground with the supply voltage of 120V AC and all controls for normal positions This circuit diagram is a standard one actual circuits printed may be subje...

Page 55: ...56 VC A565U H965U POWER CIRCUIT BLOCK DIAGRAM ...

Page 56: ...hms M 1 Meg ohm 2 All resistors are 1 8 watt unless otherwise noted 3 All capacitors µF unless otherwise noted P µµF Voltages and waveform are measured as follows DC voltages are measured with an SSVM placed between points indicated and chassis ground with the supply voltage of 120V AC and all controls for normal positions This circuit diagram is a standard one actual circuits printed may be subje...

Page 57: ...5U VC A565U H965U 58 59 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN MAIN CIRCUIT 1 ...

Page 58: ...VC A565U H965U VC A565U H965U 60 61 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 2 ...

Page 59: ...VC A565U H965U VC A565U H965U 62 63 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 3 ...

Page 60: ...VC A565U H965U VC A565U H965U 64 65 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 4 ...

Page 61: ...66 VC A565U H965U VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses OPERATION CIRCUIT A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...

Page 62: ...67 VC A565U H965U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 PWB FOIL PATTERN OPERATION PWB LCD PWB ...

Page 63: ...VC A565U H965U VC A565U H965U 68 69 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J MAIN PWB ...

Page 64: ...70 VC A565U H965U M E M O ...

Page 65: ...tent 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 r...

Page 66: ...B VC H965U C169 VCEA9M1HW105M V 1 50V Electrolytic AB VC H965U C201 VCEA9M0JW476M V 47 6 3V Electrolytic AB C202 VCKYCY1CF104Z V 0 1 16V Ceramic AA C203 VCCCCY1HH151J V 150p 50V Ceramic AA C204 VCKYCY1CF104Z V 0 1 16V Ceramic AA C205 VCCCCY1HH560J V 56p 50V Ceramic AA C206 VCKYCY1CF104Z V 0 1 16V Ceramic AA C207 VCKYCY1CF104Z V 0 1 16V Ceramic AA C208 VCKYCY1CF104Z V 0 1 16V Ceramic AA C209 VCKYCY...

Page 67: ...CKYCY1EB103K V 0 01 25V Ceramic AA C726 VCKYCY1HB102K V 1000p 50V Ceramic AA C731 VCKYCY1HF103Z V 0 01 50V Ceramic AA C734 VCKYCY1HB102K V 1000p 50V Ceramic AA C735 VCKYCY1HF103Z V 0 01 50V Ceramic AA C740 VCKYCY1HB221K V 220p 50V Ceramic AA C744 VCKYCY1EB103K V 0 01 25V Ceramic AA C750 VCEA2A1VW107M V 100 35V Electrolytic AC C751 VCKYCY1HF103Z V 0 01 50V Ceramic AA C752 VCKYCY1HF103Z V 0 01 50V C...

Page 68: ... Metal Oxide AA R635 VRS CY1JF472J V 4 7k 1 16W Metal Oxide AA R636 VRD RA2BE561J V 560 1 8W Carbon AA R653 VRS CY1JF473J V 47k 1 16W Metal Oxide AA VC H965U R654 VRS CY1JF682J V 6 8k 1 16W Metal Oxide AA VC H965U R655 VRD RA2BE473J V 47k 1 8W Carbon AA VC H965U R656 VRS CY1JF682J V 6 8k 1 16W Metal Oxide AA VC H965U R657 VRS CY1JF681J V 680 1 16W Metal Oxide AA VC H965U R658 VRS CY1JF223J V 22k 1...

Page 69: ...CY1JF472J V 4 7k 1 16W Metal Oxide AA R974 VRD RM2HD152J V 1 5k 1 2W Carbon AA R7781 VRS CY1JF222J V 2 2k 1 16W Metal Oxide AA R7782 VRS CY1JF821J V 820 1 16W Metal Oxide AA R7783 VRS CY1JF470J V 47 1 16W Metal Oxide AA R7784 VRS CY1JF684J V 680k 1 16W Metal Oxide AA R7785 VRS CY1JF125J V 1 2M 1 16W Metal Oxide AA R8001 VRS CY1JF472J V 4 7k 1 16W Metal Oxide AA R8002 VRS CY1JF472J V 4 7k 1 16W Met...

Page 70: ...er and Lower Drum BF Ass y 63 DDRMW0043TEX1 V Upper and Lower Drum BH Ass y 64 QCNW A244WJZZ V Loading Motor Wire 65 QBRSK0041GEZZ J OR P1151 KUMA AD 66 XBPSD26P04500 V 2 6P 4 5A D M AB 67 PGiDM0187AJZZ V Open Guide 70 MSPRC0228AJFJ V Azimuth Spring AB 71 MSPRC0224AJFJ V Height Adjusting Spring AC 72 LHLDW1894AJZZ V R T FFC Holder AB 73 MLEVP0355AJZZ V Auto Head Cleaner AC SCREW NUTS AND WASHERS 2...

Page 71: ...AJFW V H A Shield FRONT PANEL PARTS 500 CPNLC2998TEV1 V Front Panel Ass y AQ VC A565U 500 CPNLC2999TEV1 V Front Panel Ass y VC H965U 500 1 Front Panel Not Replacement Item 500 3 HDECQ2469AJSA V Cassette Flap VC H965U 500 3 HDECQ2471AJSA V Cassette Flap AE VC A565U 500 4 HDECQ2470AJSA V Window Dec AE 500 6 HiNDP2237AJSA V Timer LED Indicator AD 500 7 MSPRD0105AJFJ V Cassette Spring 500 11 GCOVA2214...

Page 72: ...ANISM CHASSIS PARTS A B C D E F G H 1 2 3 4 5 6 A A 205 66 66 53 222 221 55 17 59 56 70 202 66 65 62 66 62 63 1 33 9 2 58 24 32 7 51 49 73 201 203 49 215 51 16 71 8 215 6 12 36 31 18 13 44 60 224 45 67 41 19 28 204 38 37 61 208 29 10 34 11 30 23 48 46 219 27 35 209 210 211 212 213 214 35 43 5 43 4 21 52 25 72 64 20 205 216 ...

Page 73: ...Part No Description Code Ref No Part No Description Code 79 VC A565U H965U CASSETTE HOUSING CONTROL PARTS A B C D E F G H 1 2 3 4 5 6 A A 300 302 306 304 301 314 314 305 309 315 303 312 313 317 308 307 310 311 ...

Page 74: ...cription Code Ref No Part No Description Code 80 VC A565U H965U CABINET PARTS A B C D E F G H 1 2 3 4 5 6 C E A D 601 D VC H965U VC A565U 606 600 607 612 607 607 602 602 605 C B E A B 603 613 604 612 609 608 611 610 607 ...

Page 75: ... bend the cover 5 Draw out the left side rod Do not mount the front panel with the cassette cover tilted too open Otherwise the cassette cover might wrongly run on the cassette housing Keep the cassette over about 45 open and make sure that the cassette cover open le ver is between the front panel and the cassette cover Now fix the front panel in place Before attaching the front panel in position ...

Page 76: ... bend the cover 5 Draw out the left side rod Do not mount the front panel with the cassette cover tilted too open Otherwise the cassette cover might wrongly run on the cassette housing Keep the cassette over about 45 open and make sure that the cassette cover open le ver is between the front panel and the cassette cover Now fix the front panel in place Before attaching the front panel in position ...

Page 77: ...eplacement Item Dry Battery RF conv CH preset at 3 channel TLABV0182AJZZ Bar Code Label SPAKX1152AJZZ Packing Foam QCNW 8614AJZZ 75 ohm Coaxial Cable SPAKC4989AJZZ VC H965U SPAKC4990AJZZ VC A565U Packing Case Accessories TiNS 4085AJZZ Instruction Book RRMCG1237AJSB Infrared Remote Control Unit SPAKAA012WJZZ Packing Cusion SPAKP0114AJZZ Foam Bag ...

Page 78: ... Tochigi 329 2193 Japan No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher D SEM P SMM TQ1110 S Jan 2002 Printed in JAPAN NA DS COPYRIGHT 2002 BY SHARP CORPORATION ALL RIGHTS RESERVED ...

Search results

Summary of Contents for VC-A565U

Reviews:

Brands by name

Popular brands

Sharp VC-A565U, Service Manual

Search results

Summary of Contents for VC-A565U

Reviews:

Brands by name

Popular brands