Sharp VC-A415U Service Manual Download Page 65

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Ref. No.

Part No.

★

Description

Code

Ref. No.

Part No.

★

Description

Code

VC-A415U/H815U
VC-H817U/H818U

C789

VCKYCY1EB103K

V 0.01

25V Ceramic

C790

VCKYCY1HB392K V 3900p 50V Ceramic

C791

VCKYCY1HB392K V 3900p 50V Ceramic

C792

VCEA9M1CW476M V 47

16V Electrolytic

C794

VCKYCY1EB223K

V 0.022 25V Ceramic

C795

VCKYCY1EB223K

V 0.022 25V Ceramic

C797

VCKYCY1CF104Z

V 0.1

16V Ceramic

C798

VCKYCY1EB223K

V 0.022 25V Ceramic

C801

VCKYCY1HF103Z

V 0.01

50V Ceramic

C802

VCEA9M0JW476M V 47

6.3V Electrolytic

C803

VCKYCY1HF103Z

V 0.01

50V Ceramic

C804

VCEA9M0JW476M V 47

6.3V Electrolytic

C805

VCKYCY1HF103Z

V 0.01

50V Ceramic

C901

RC-FZ023CUMZZ

V 0.01 AC250V M.Polypro

C903

RC-KZ0092GEZZ

J 3300p AC125V Ceramic

C903

RC-KZ0147GEZZ

J 3300p AC125V Ceramic

C906

RC-EZ0238CEZZ

V 82

200V Electrolytic

C907

RC-KZ0029CEZZ

V 0.01

500V Ceramic

C908

VCKYPA2HB221K

V 220p 500V Ceramic

C910

VCKYCY1HB332K V 3300p 50V Ceramic

C911

VCQYTA1HM472K V 4700p 50V Mylar

C915

VCKYCY1HB221K V 220p 50V Ceramic

C916

VCKYCY1HF333Z

V 0.033 50V Ceramic

C921

VCEA0A2AW106M V 10

100V Electrolytic

C922

VCEA0A1VW477M V 470

35V Electrolytic

C923

VCEA0A1VW477M V 470

35V Electrolytic

C924

VCEA0A1HW226M V 22

50V Electrolytic

C925

VCEA0A0JW108M V 1000 6.3V Electrolytic

C926

VCEA0A0JW107M V 100

6.3V Electrolytic

C927

VCKYCY1HF103Z

V 0.01

50V Ceramic

C928

VCEA0A1CW337M V 330

16V Electrolytic

C929

VCEA0A0JW108M V 1000 6.3V Electrolytic

C932

VCQYTA1HM104J V 0.1

50V Mylar

C933

VCQYTA1HM104J V 0.1

50V Mylar

C941

VCEA9A1CW476M V 47

16V Electrolytic

C942

VCEA9M0JW476M V 47

6.3V Electrolytic

C951

VCKYCY1HF333Z

V 0.033 50V Ceramic

C953

VCEA9M1CW106M V 10

16V Electrolytic

C954

VCEA9M1HW105M V 1

50V Electrolytic

C971

VCEA9M0JW226M V 22

6.3V Electrolytic

C981

VCEA9M0JW476M V 47

6.3V Electrolytic

C985

VCEA9M0JW476M V 47

6.3V Electrolytic

C991

VCEA9M1CW476M V 47

16V Electrolytic

R628

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-A415U)

RESISTORS

RJ101

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ102

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-H815U/H817U/H818U)

RJ103

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-A415U)

RJ301

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ302

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ303

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ304

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ305

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ501

VRS-CY1JF000J

V 0

1/16W Metal Oxide

RJ502

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R16

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-H815U/H817U/H818U)

R36

VRS-CY1JF000J

V 0

1/16W Metal Oxide

(VC-H815U/H817U/H818U)

R101

VRS-CY1JF470J

V 47

1/16W Metal Oxide

R103

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

R104

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R105

VRS-CY1JF000J

V 0

1/16W Metal Oxide

R107

VRS-CY1JF822J

V 8.2k 1/16W Metal Oxide

(VC-H815U/H817U/H818U)

R108

VRS-CY1JF822J

V 8.2k 1/16W Metal Oxide

(VC-A415U)

R111

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

R112

VRS-CY1JF153J

V 15k

1/16W Metal Oxide

C673

VCEA9M0JW226M V 22

6.3V Electrolytic

(VC-H815U/H817U/H818U)

C674

VCKYCY1CF224Z

V 0.22

16V Ceramic

(VC-H815U/H817U/H818U)

C675

VCKYCY1CF104Z

V 0.1

16V Ceramic

(VC-H815U/H817U/H818U)

C677

VCEA9M1CW106M V 10

16V Electrolytic

(VC-H815U/H817U/H818U)

C678

VCKYCY1HF103Z

V 0.01

50V Ceramic

(VC-H815U/H817U/H818U)

C679

VCKYCY1CF224Z

V 0.22

16V Ceramic

(VC-H815U/H817U/H818U)

C680

VCKYCY0JF105Z

V 1

6.3V Ceramic

(VC-H815U/H817U/H818U)

C681

VCKYCY1HF103Z

V 0.01

50V Ceramic

(VC-H815U/H817U/H818U)

C682

VCKYCY0JF105Z

V 1

6.3V Ceramic

(VC-H815U/H817U/H818U)

C684

VCCCCY1HH560J V 56p

50V Ceramic

(VC-H815U/H817U/H818U)

C685

VCCCCY1HH560J V 56p

50V Ceramic

(VC-H815U/H817U/H818U)

C701

VCKYCY1HF103Z

V 0.01

50V Ceramic

C702

VCKYCY1HF103Z

V 0.01

50V Ceramic

C703

VCEA9M1HW105M V 1

50V Electrolytic

C704

VCKYCY0JF105Z

V 1

6.3V Ceramic

C705

VCKYCY1HF103Z

V 0.01

50V Ceramic

C706

VCKYCY1HF103Z

V 0.01

50V Ceramic

C707

VCCCCY1HH120J V 12p

50V Ceramic

C708

VCCCCY1HH150J V 15p

50V Ceramic

C711

VCKYCY1HB102K V 1000p 50V Ceramic

C712

VCKYCY1HB102K V 1000p 50V Ceramic

C713

VCKYCY1HB102K V 1000p 50V Ceramic

C714

VCKYCY1CF104Z

V 0.1

16V Ceramic

C715

VCEA9M0JW226M V 22

6.3V Electrolytic

C717

VCKYCY1HB221K V 220p 50V Ceramic

C718

VCKYCY1CF104Z

V 0.1

16V Ceramic

C719

VCKYCY1EB103K

V 0.01

25V Ceramic

C722

VCKYCY1HF103Z

V 0.01

50V Ceramic

C723

VCKYCY1HF103Z

V 0.01

50V Ceramic

C724

VCKYCY1HF103Z

V 0.01

50V Ceramic

C726

VCKYCY1HF103Z

V 0.01

50V Ceramic

(VC-H815U/H817U/H818U)

C727

VCKYCY1HF103Z

V 0.01

50V Ceramic

C729

VCKYCY1HF103Z

V 0.01

50V Ceramic

C730

VCKYCY1HF103Z

V 0.01

50V Ceramic

C736

VCKYCY1HF103Z

V 0.01

50V Ceramic

C737

VCKYCY1HF103Z

V 0.01

50V Ceramic

C738

VCKYCY1HB102K V 1000p 50V Ceramic

C739

VCKYCY1HB102K V 1000p 50V Ceramic

C743

VCKYCY0JF105Z

V 1

6.3V Ceramic

C744

VCEA2A0JW477M V 470

6.3V Electrolytic

C747

VCKYCY1HF103Z

V 0.01

50V Ceramic

(VC-H815U/H817U/H818U)

C748

VCKYCY1HF103Z

V 0.01

50V Ceramic

C750

VCKYCY1HF103Z

V 0.01

50V Ceramic

C751

VCKYCY1HF103Z

V 0.01

50V Ceramic

C752

VCEA2A1VW107M V 100

35V Electrolytic

C754

VCKYCY1EB103K

V 0.01

25V Ceramic

C755

VCKYCY1HF473Z

V 0.047 50V Ceramic

C756

VCKYCY1HF473Z

V 0.047 50V Ceramic

C759

VCEA9M0JW226M V 22

6.3V Electrolytic

C760

VCEA9M0JW107M V 100

6.3V Electrolytic

C763

VCEA9M0JW476M V 47

6.3V Electrolytic

C764

VCKYCY1HF103Z

V 0.01

50V Ceramic

C770

VCCCCY1HH101J V 100p 50V Ceramic

C771

VCE9EM1HW105M V 1

50V Electrolytic

C774

VCKYCY1CF104Z

V 0.1

16V Ceramic

C775

VCEA9M0JW107M V 100

6.3V Electrolytic

C776

VCKYCY0JF105Z

V 1

6.3V Ceramic

C783

VCKYCY0JF105Z

V 1

6.3V Ceramic

C784

VCKYCY1HB102K V 1000p 50V Ceramic

C785

VCEA9M0JW476M V 47

6.3V Electrolytic

C786

VCKYCY1CF334Z

V 0.33

16V Ceramic

C787

VCFYFA1HA474J

V 0.47

50V M.Polypro

Summary of Contents for VC-A415U

Page 1: ...d to its original condition and only parts identical to those specified be used MODELS 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 31 6 MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE 33 7 TROUBLESHOOTING 39 8 BLOCK DIAGRAM 50 9 SCHEMATIC DIAGRAM AND ...

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: ...nt le dos du coffret les couvercles de compartiment et ajustement ou les boucliers les réseauxderésistance condensateurd isolement Ies isolateurs mécaniques etc 3 Pourêtresûrqu iln yaaucunrisquedechocélectrique vérifier le courant de fuite de la maniére suivante Brancherlecordond alimentationsecteurdirectement dansuneprisedecourantde120volts Nepasutiliser de transformateur d isolement pour cet ess...

Page 4: ...f 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 D708 and D709 Adjust the notch of the part to the white marker of...

Page 5: ...ad Cleaning System Built in Front AV Jacks 1 2 SPECIFICATIONS Format VHS NTSC Standard Video Recording System Rotary Two Head Helical Scanning 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 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 6...

Page 6: ...on ON SCREEN button SET button VCR Plus button ZERO BACK button SKIP SEARCH button REPLAY button PAUSE STILL button TAMPER PROOF button STOP button button VC H817U H818U FF button POWER button EJECT button TV VCR button REW button REC button TAPE SPEED button Numbered buttons PLAY button 100 ENT AM PM button AUTO REPEAT button CANCEL button INPUT button SLOW button Inserting the Batteries Make sur...

Page 7: ...button2 VC A415U H815U Remove 2 screws 3 and 7 clips 4 OPERATION Remove 1 screw 5 PWB SHIELD ANGLE Remove 1 screw 6 with shield angle MECHANISM Remove 1 screw 7 1 screw 8 2 MAIN PWB screws 9 2 screws 0 Remove 1 screw q with antenna terminal cover Remove 1 screw w with top cabinet fix angle MAIN FRAME FRONT PANEL FRONT PANEL OPERATION PWB TOP CABINET FIX ANGLE TOP CABINET SHIELD ANGLE MECHANISM MAI...

Page 8: ...1 and remove the antenna cover Remove the PWB bottom plate 1 screw 2 Remove the FFC cable AA AD AH 3 which connect ing 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 4 fixing the cassette housing to the mechanism and remove the cassette housing 2 1 3 4 CASSETTE HOUSING MAIN PWB ...

Page 9: ...nitial set position 1 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...

Page 10: ... Supply pole base ass y 3 Tension arm 4 Idler wheel ass y 5 Pinch drive lever ass y 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 Casecon drive gear 13 Take up reel disk 14 Pinch roller lever ass y 17 15 10 11 5 9 14 12 8 16 13 4 6 2 7 3 1 18 ...

Page 11: ... PARTS BOTTOM VIEW No Function No Function 15 Drum ass y 16 Loading motor 17 Drum drive motor 18 Take up pole base ass y 19 Slow brake lever 20 Master cam 21 Capstan D D motor 22 Reel belt 23 Clutch lever 24 Limiter pulley ass y 26 Shifter 26 24 21 22 19 20 12 23 ...

Page 12: ... not contact the guide pin or drum 5 After installing the cassette housing control once per form cassette loading operation 4 4 TORUNATAPEWITHOUTTHECASSETTE HOUSING CONTROL ASSEMBLY 1 Remove the full surface panel 2 Short circuit 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 t...

Page 13: ...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 damage Figur...

Page 14: ...hort circuiting 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 seconds by h...

Page 15: ...t counterclockwise very slowly one rotation every 1 to 2 seconds and check that the torque is within the set value 14 0 3 9mN m 144 40gf cm Figure 4 11 Note Surely put the torque gauge on the reel disk to measure If the torque gauge is raised accurate measurement is impossible Adjustment If the rewinding playback winding up torque is not within the setting replace the limiter pulley assembly Note ...

Page 16: ... CHECKING THE VIDEO SEARCH REWIND BACK TENSION Remove the cassette housing control assembly After short circuiting 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 ...

Page 17: ...left right 4 13 CHECKING AND ADJUSTMENT OF RECORD PLAYBACK BACK TENSION Remove the cassette housing control assembly After short circuiting 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 po...

Page 18: ...entofthebraketorqueatthesupplysideandthe 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 20 4 14 CHECKING THE BRAKE TORQUE Checking the brake torque at...

Page 19: ...bly 2 In unloading state unplug the power cord Removal 1 Remove the screws123 Azimuth screw Tilt screw 2 Unsolder the 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 New A C head ass y A C head PWB 2 Spring 1 Solder Never touch the head 10 8mm 10 8mm Azimuth screw H...

Page 20: ...uide lower flange to 13 38 mm using the reverse guide height adjustment jig in tape loading state Refer to Figure 4 28 a b Figure 4 29 3 Set the tape and check for tape crease near the reverse guide in the playback mode If crease is found turn the reverse guide adjustment nut to remove crease As for crease check refer to Figure 4 30 a b Figure 4 28 2 Rotate counterclockwise the reverse guide heigh...

Page 21: ...wise so that tape crease appears once at the flange and then return the tilt screw so that the crease disappears 2 If there is tape crease Turn counterclockwise the tilt screw so that the tape crease disappears Reference If the tilt screw is turned clockwise crease appears at the lower flange Guide roller Weight of 500g Cassette Tape 2 Adjustment of A C head height and azimuth 1 Perform the initia...

Page 22: ...Refer to the electric adjustment method 6 Playback the self picture recorded tape and check the flatness of envelope 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 18 3 2 PB CHROMA Envelope CH 1 CH 2 Head switching pulse Figure 4 34 4 A C head X value adjustment 1 Tentatively fix A C head arm screws 1 and 2...

Page 23: ...allation adjust the playback switching point for adjustment of servo circuit 4 19 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 three screws 2 Figure 4 37 Reassembly 1 Taking care so that the capstan shaft d...

Page 24: ...THE UPPER AND LOWER DRUM ASSEMBLY Replacement Perform in the numerical order 1 Remove the motor as stated in4 20 D D motor replace ment 2 Remove the drum earth brush ass y 2 3 Remove the drum base 3 from the upper and lower drum assembly 1 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...

Page 25: ...n Lever Ass y 3Insert Open Lever Insert reverse guide lever ass y Align here 2 Insert pinch drive cam Pinch drive lever ass y Fit the pinch drive cam so that the notch of pinch drive cam aligns with the dent of pinch drive lever assembly Fit the pinch drive cam so that the notch of pinch drive lever assembly aligns with the half round notch of chassis Turn the reverse guide lever assembly counterc...

Page 26: ...3 3 For the phase matching at the insert point 1 see the Phase Matching point 2 as shown below 4 Finally fix the inserts 1 and 4 Capstan D D motor Drum Reel pulley Bottom side of mechanism chassis Sifter Phase Matching point 2 Insert point 1 Half round notch Shaft 1 Round mark Loading gear T Insert point 3 Insert point 4 Insert point 5 Release point 3 Phase matching point 1 Shaft 1 Shaft 1 Shaft 4...

Page 27: ...lacement Remove the loading motor and install the replacement loading motor as shown below Figure 4 46 Figure 4 44 2 Wheninstallingthemastercam align the casecon drive gear round mark with the half round notch of master cam The loading motor pressing in must be less than 14 7 N 1 500 gf Adjust the distance between motor and pulley to 10 2 mm E ring XRESJ30 06000 Master cam Fully turn clockwise Ful...

Page 28: ...L and Drive Gear R 4 26 ASSEMBLY OF CASSETTE HOUSING 1 Drive Gear and R Drive angle ass y Figure 4 47 MSPRT0381AJFJ Apply grease Apply grease Apply grease LANGF9592AJFW Top surface should be free from scratches or soil Drive angle Drive gear R Frame Figure 4 48 ...

Page 29: ... video heads Check that the mechanism and all electric components are in good working condition prior to the adjustments otherwise adjustments can not 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 P201 TP201 204 ...

Page 30: ...Short circuit between TP801 and TP802 on the opera tion PWB to center tracking 3 Press the tracking buttons or 20 times each to bring the tracking off center Make sure that 1 There is nothing unusual on the playback screen 2 There is nothing unusual in the Hi Fi sound for the Hi Fi models only 4 Press the STOP button to quit test mode Note Self recorded tape is a cassette whose program was re cord...

Page 31: ...otor turns 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 Tap...

Page 32: ...stops End 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 ...

Page 33: ...r Loading 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 c...

Page 34: ... system 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 ...

Page 35: ... reel disk 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 ...

Page 36: ...ap found 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 37: ...ase 2 Check for leak or short circuiting of primary circuit part L901 D901 904 T901 C906 R904 Q901 902 etc Check for short circuiting of rectifying diode and circuit in each rectifying circuit of secondary circuit D921 928 FLOW CHART NO 4 When buzz is heard from the vicinity of power circuit Check for short circuiting of circuit and rectifying diode of each rectifying circuit of secondary circuit ...

Page 38: ... shutter go to open when the cassette tape is inserted FLOW CHART NO 7 No operation is possible from the infrared remote control Operation is possible from the VCR but no operation is possible from the infrared remote control Is the supply voltage of 5V feed to pin 3 terminal of remote control receiver Check AT 5V lines Is L pulse sent out pin 1 terminal of receiver when the infrared remote contro...

Page 39: ... NO NO NO NO NO NO YES YES YES NO NO NO FLOW CHART NO 11 No power is turned on Does power control H signal at pin 4 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 collector of Q951 Check Q951 and the AT 5V line Check peripheral circuits for poor soldering FLOW CHART NO 12 The capst...

Page 40: ...drum motor rotating Is the drum PG signal and drum FG signal present on pins 66 and 65 of IC701 respectively Are there drum PG M M signal at pin 81 of IC701 Check C723 and readjust R701 HEAD SW POINT control Could be lines between IC706 and IC701 Check peripheral circuit of IC706 Are the drum PG and drum FG signals present on pins 7 and 8 of IC706 Replace IC701 Check or replace drum motor Check li...

Page 41: ...k peripheral circuit of pin 50 of IC701 C770 C771 and R770 Check drum FG signal line Is the head switching pulse at pin 23 of IC701 present NO See FLOW CHART NO 15 YES YES Is the drum APC output at pin 34 of IC701 and drum AFC output at pin 32 of IC701 present NO Replace IC701 YES YES Is the drum control voltage applied to pin 2 of IC706 YES Is pin 46 of IC701 in high impedance NO YES NO Check lin...

Page 42: ...3 of IC701 Replace IC701 Replace A C head YES YES YES NO NO NO Is there capstan AFC signal at pin 31 of IC701 NO NO NO Is there capstan APC signal at pin 33 of IC701 YES NO Replace IC701 Does PB CTL signal appear at pin 76 of IC701 Replace IC701 Is there REC CTL signal output at pins 75 and 74 of IC701 Does PB CTL signal appear at pin 76 of IC701 Does A C head operate normally Adjust the height of...

Page 43: ... pin 49 of IC701 Is picture signal output to the pin 47 of IC701 Check the line between pin 52 of IC201 and pin 49 of IC701 Check the line between pins 63 and 62 of IC201 and pins 56 and 57 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 app...

Page 44: ...f IC201 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...

Page 45: ...201 Is 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 ...

Page 46: ... pins 53 and 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 ...

Page 47: ...ht adjusted 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 27 Check the periphery of pin 99 of IC201 R617 ...

Page 48: ...VC A415U H815U VC H817U H818U VC A415U H815U VC H817U H818U 50 51 8 BLOCK DIAGRAM SYSTEM SERVO BLOCK DIAGRAM ...

Page 49: ...5U H815U VC H817U H818U 52 53 SIGNAL FLOW BLOCK DIAGRAM VC A415U E E signal E E signal Audio Audio playback signal Audio recording signal Playback chroma signal Recording chroma signal Playback luminance signal Recording luminance signal ...

Page 50: ...5U VC H817U H818U 54 55 SIGNAL FLOW BLOCK DIAGRAM VC H815U H817U H818U E E signal E E signal Audio Audio playback signal Audio recording signal Playback chroma signal Recording chroma signal Playback luminance signal Recording luminance signal ...

Page 51: ...56 VC A415U H815U VC H817U H818U POWER CIRCUIT BLOCK DIAGRAM ...

Page 52: ...ted K 1000 ohms 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 Thiscircuitdiagramisastandardone actualcircuits printed may be ...

Page 53: ...8U VC A415U H815U VC H817U H818U 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 54: ...U H815U VC H817U H818U VC A415U H815U VC H817U H818U 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 55: ...U H815U VC H817U H818U VC A415U H815U VC H817U H818U 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 56: ...U H815U VC H817U H818U VC A415U H815U VC H817U H818U 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 57: ...66 VC A415U H815U VC H817U H818U 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 LOCATOR CIRCUIT VC H818U ...

Page 58: ...67 VC A415U H815U VC H817U H818U 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 Component Side Wiring Side LOCATOR PWB VC H818U Component Side Wiring Side ...

Page 59: ...VC A415U H815U VC H817U H818U VC A415U H815U VC H817U H818U 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 Component Side ...

Page 60: ...VC A415U H815U VC H817U H818U VC A415U H815U VC H817U H818U 70 71 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 Wiring Side ...

Page 61: ...72 VC A415U H815U VC H817U H818U M E M O ...

Page 62: ... V KS24C02S E2PROM AG or IC710 VHiS24C02A 1 V S24C02A E2PROM AK or IC710 VHiBR2402E2 1 V BR2402E2 E2PROM AG IC801 VHiMN12511 1 V MN12511 AQ IC903 VHiKiA431 1 V KIA431 AE TRANSISTORS Q251 VS2SA1530ARS1 V 2SA1530ARS1 AC Q302 VS2SD1306 E1E V 2SD1306 E AD Q306 VS2SA1530ARS1 V 2SA1530ARS1 AC De nombreuses pièces électriques et mécaniques de magnétosco pes présentent des caractéristiques particulières d...

Page 63: ...VC H815U H817U H818U C160 VCEA9M1HW225M V 2 2 50V Electrolytic AB VC H815U H817U H818U C161 VCKYCY1CB104K V 0 1 16V Ceramic AB VC H815U H817U H818U Q501 VS2SC3052EF 1 V 2SC3052EF 1 AC VC H815U H817U H818U Q602 VS2SD1859TV 1 V 2SD1859TV AD or Q602 VS2C3939SQR 1 V 2C3939SQR AC Q603 VS2SC3052EF 1 V 2SC3052EF AC Q651 VS2SD1306 E1E V 2SD1306 E AD VC H815U H817U H818U Q652 VS2SD1306 E1E V 2SD1306 E AD V...

Page 64: ...100 16V Electrolytic AB VC H815U H817U H818U C672 VCKYCY1CF224Z V 0 22 16V Ceramic AA VC H815U H817U H818U C162 VCKYCY1CB473K V 0 047 16V Ceramic AA VC H815U H817U H818U C163 VCEA9M1HW474M V 0 47 50V Electrolytic AB VC H815U H817U H818U C164 VCKYCY1CB104K V 0 1 16V Ceramic AB VC H815U H817U H818U C165 VCKYCY1CB104K V 0 1 16V Ceramic AB VC H815U H817U H818U C166 VCKYCY1CB273K V 0 027 16V Ceramic AA...

Page 65: ...Y1JF822J V 8 2k 1 16W Metal Oxide AA VC H815U H817U H818U R108 VRS CY1JF822J V 8 2k 1 16W Metal Oxide AA VC A415U R111 VRS CY1JF153J V 15k 1 16W Metal Oxide AA R112 VRS CY1JF153J V 15k 1 16W Metal Oxide AA C673 VCEA9M0JW226M V 22 6 3V Electrolytic AB VC H815U H817U H818U C674 VCKYCY1CF224Z V 0 22 16V Ceramic AA VC H815U H817U H818U C675 VCKYCY1CF104Z V 0 1 16V Ceramic AA VC H815U H817U H818U C677 ...

Page 66: ... 16W Metal Oxide AA R732 VRS CY1JF223J V 22k 1 16W Metal Oxide AA R145 VRS CY1JF000J V 0 1 16W Metal Oxide AA VC H815U H817U H818U R201 VRS CY1JF682J V 6 8k 1 16W Metal Oxide AA R202 VRS CY1JF182J V 1 8k 1 16W Metal Oxide AA R203 VRS CY1JF682J V 6 8k 1 16W Metal Oxide AA R207 VRS CY1JF101J V 100 1 16W Metal Oxide AA R211 VRS CY1JF153J V 15k 1 16W Metal Oxide AA R212 VRS CY1JF153J V 15k 1 16W Metal...

Page 67: ...JF103J V 10k 1 16W Metal Oxide AA R833 VRS CY1JF103J V 10k 1 16W Metal Oxide AA R835 VRD RA2BE183J V 18k 1 8W Carbon AA R839 VRD RA2BE102J V 1k 1 8W Carbon AA VC H818U R841 VRD RA2BE183J V 18k 1 8W Carbon AA R843 VRD RA2BE474J V 470k 1 8W Carbon AA R845 VRD RA2BE474J V 470k 1 8W Carbon AA R846 VRD RA2BE103J V 10k 1 8W Carbon AA R847 VRD RA2BE474J V 470k 1 8W Carbon AA R848 VRD RA2BE474J V 470k 1 8...

Page 68: ...tch Lever AE 24 MLEVP0324AJZZ V Supply Main Brake Ass y AF 25 MLEVP0325AJZZ V Take up Main Brake Ass y AF RMC801 RRMCU0081GEZZ J Remote Receiver AG or RMC801 RRMCU0002AJZZ V Remote Receiver AH SC301 QSOCN0611REN1 V Socket 6 Pin VC A415U AC SC301 QSOCN0911REN1 V Socket 9 Pin VC H815U AD H817U H818U SC601 QSOCN0695REZZ V Socket 6 Pin AB SC602 QSOCZ0293GEZZ J Socket 2 Pin AC SC701 QSOCN0795REZZ V Soc...

Page 69: ... E Ring E 3 AA 209 XWHJZ31 03052 V Washer W3 1 5 2 0 3 AC 210 XWHJZ31 04052 V Washer W3 1 5 2 0 4 AC 211 XWHJZ31 05052 V Washer W3 1 5 2 0 5 AC 212 XWHJZ31 06052 V Washer W3 1 5 2 0 6 AC 213 XWHJZ31 07052 V Washer W3 1 5 2 0 7 AC 214 PSPAP0009AJZZ V Reverse Guide Adjusting AB Nut 216 LX WZ1041GE00 J CW 2 6 6 0 5 CAM AA 218 XBPSD30P06J00 V Drum Base Mounting AA Screw SW 3P 6S 219 LX WZ1098GE00 J CW...

Page 70: ...AJSA V PLAY Button AF VC H817U H818U 500 9 JBTN 3021AJSA V POWER Button AE VC H817U H818U 500 10 JBTN 3022AJSA V CHANNEL Button AB VC H817U H818U 502 1 JBTN 2942AJSA V PLAY Button AH VC A415U H815U 502 2 LHLDZ2066AJZZ V Button Holder AC VC A415U H815U SUPPLIED ACCESSORIES ACCESSORIES TiNS 3739AJZZ V Operation Manual AG VC A415U H815U TiNS 3758AJZZ V Operation Manual AK VC H815UC H817UC H818UC TiNS...

Page 71: ...EW OF MECHANICAL PARTS MECHANISM CHASSIS PARTS 31 12 20 18 214 19 29 49 51 8 11 203 49 51 7 58 52 4 25 24 2 33 15 1 50 218 207 67 207 53 216 41 61 21 38 17 208 60 47 44 6 30 36 9 39 45 219 10 30 40 27 43 46 43 35 35 37 34 23 48 209 210 211 212 213 223 5 26 68 69 55 16 222 221 201 202 202 220 59 70 57 71 56 32 22 63 62 66 66 66 66 65 62 224 ...

Page 72: ...Description Code Ref No Part No Description Code 83 VC A415U H815U VC H817U H818U CASSETTE HOUSING CONTROL PARTS A B C D E F G H 1 2 3 4 5 6 301 304 311 311 305 306 309 303 312 316 315 307 314 310 317 313 302 308 300 ...

Page 73: ...No Description Code 84 VC A415U H815U VC H817U H818U CABINET PARTS A B C D E F G H 1 2 3 4 5 6 B C C B 600 609 615 602 612 605 604 603 607 608 610 614 606 601 615 609 613 605 A VC H815U H817U H818U VC A415U VC A415U VC H815U H817U H818U 615 602 A ...

Page 74: ...ly 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 covermightwronglyrun onthecassettehousing 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 make...

Page 75: ...ly 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 covermightwronglyrun onthecassettehousing 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 make...

Page 76: ...lightly 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 covermightwronglyrun onthecassettehousing 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: ...AKX1073AJZZ VC A415U H815U Packing Add Accessories TiNS 3739AJZZ Operation Manual VC A415U H815U TiNS 3758AJZZ Operation Manual VC H815UC H817UC H818UC TiNS 3764AJZZ Operation Manual VC H818U TGAN 0001AJZZ Warranty Card U S A Only RRMCG1238AJSA VC A415U H815U RRMCG1239AJSA VC H817U RRMCG1240AJSA VC H818U Infrared Remote Control Unit QCNW 8115AJZZ 75 ohm Coaxial Cable SPAKC4262AJZZ VC H817U SPAKC42...

Page 78: ...Ref No Part No Description Code Ref No Part No Description Code 89 VC A415U H815U VC H817U H818U M E M O ...

Page 79: ...Ref No Part No Description Code Ref No Part No Description Code 90 VC A415U H815U VC H817U H818U M E M O ...

Page 80: ...Ref No Part No Description Code Ref No Part No Description Code 91 VC A415U H815U VC H817U H818U M E M O ...

Page 81: ...ochigi 329 2193 Japan COPYRIGHT C 2000 BY SHARP CORPORATION ALL RIGHTS RESERVED 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 TQ0849 S Mar 2000 Printed in JAPAN NA NS VC A415U H815U VC H817U H818U ...

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