Sharp VC-A410U Service Manual Download

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Ref. No.

Part No.

★

Description

Code

Ref. No.

Part No.

★

Description

Code

VC-A410U
VC-H810U

R885

VRS-CY1JF223J

V 22k

1/16W Metal Oxide

R886

VRS-CY1JF103J

V 10k

1/16W Metal Oxide

R887

VRS-CY1JF473J

V 47k

1/16W Metal Oxide

R888

VRS-CY1JF123J

V 12k

1/16W Metal Oxide

R889

VRS-CY1JF563J

V 56k

1/16W Metal Oxide

R897

VRD-RA2BE563J

V 56k

1/8W

Carbon

R898

VRD-RA2BE223J

V 22k

1/8W

Carbon

SWITCHES

S882

QSW-K0086GEZZ

J Switch, Stop

S882

QSW-K0004AJZZ

V Switch, Stop

S883

QSW-K0086GEZZ

J Switch, Rec

S883

QSW-K0004AJZZ

V Switch, Rec

S884

QSW-K0086GEZZ

J Switch, Pause/Still

S884

QSW-K0004AJZZ

V Switch, Pause/Still

S885

QSW-K0086GEZZ

J Switch, FF

S885

QSW-K0004AJZZ

V Switch, FF

S886

QSW-K0086GEZZ

J Switch, Play

S886

QSW-K0004AJZZ

V Switch, Play

S887

QSW-K0086GEZZ

J Switch, Rew

S887

QSW-K0004AJZZ

V Switch, Rew

MISCELLANEOUS PART

P881

QPLGZ0626CEZZ

V Plug, 6 Pin

MECHANISM CHASSIS PARTS

LBNDK1011AJZZ

V Tension Band Ass’y

LBOSZ1007AJZZ

V Tension Arm boss

LBOSZ1006AJZZ

V Cassette Stay L

LCHSM0174AJZZ

V Main Chassis Ass’y

LHLDZ2016AJZZ

V Loading Motor Block

LPOLM0070GEZZ

J Supply Pole Base Ass’y

LPOLM0064GEZZ

J Take-up Pole Base Ass’y

MLEVF0518AJZZ

V Take-up Loading

Arm Ass’y

MLEVF0519AJZZ

V Supply Loading

Arm Ass’y

MLEVF0499AJZZ

V Pinch Drive Lever Ass’y

MLEVF0500GEZZ

J Pinch Roller Lever Ass’y

MLEVF0523AJZZ

V Tension Arm Ass’y

LANGF9620AJFW

V A/C Head Plate

MLEVP0271AJZZ

V Shifter Drive Lever

MLEVP0272AJZZ

V Pinch Double Action Lever AD

MLEVP0301AJZZ

V Reverse Guide Lever Ass’y AL

MLEVP0275AJZZ

V Reverse Drive Lever

MLEVP0292AJZZ

V Slow Brake Lever

MLEVP0290AJZZ

V Open Lever

MLEVP0293AJZZ

V Clutch Lever

MLEVP0324AJZZ

V Supply Main Brake Ass’y

MLEVP0325AJZZ

V Take-up Main Brake Ass’y AF

MSLiP0010AJZZ

V Shifter

MSPRD0175AJFJ

V Reverse Guide Spring 2

MSPRT0402AJFJ

V Loading Double Action

Spring

MSPRT0403AJFJ

V Pinch Double Action

Spring

MSPRC0213AJFJ

V Earth Spring

MSPRT0416AJFJ

V Tension Spring

NBLTK0067AJ00

V Reel Belt

NDAiV1078AJ00

V Reel Disk

NGERH1293AJZZ

V Loading Connect Gear

NGERH1295AJ00

V Master Cam

NGERH1294AJZZ

V Casecon Drive Gear

NGERH1270AJZZ

V Take-up Loading Gear

NGERH1271AJZZ

V Supply Loading Gear

NGERH1272AJZZ

V Pinch Drive Cam

NGERH1299AJZZ

V Reel Relay Gear

NGERW1070AJZZ V Worm Gear

NGERW1066AJZZ V Worm Wheel Gear

NiDR-0018AJZZ

V Idler Wheel Ass’y

NPLYV0162AJZZ

V Motor Pulley

NPLYV0163AJZZ

V Limiter Pulley Ass’y

NROLP0131GEZZ

J Guide Roller

NSFTP0032AJZZ

V Tension Pole Adjuster

MSPRC0217AJFJ

V Guide Roller Spring

PREFL1011AJZZ

V Light Guide

QCNW-8022AJZZ

V FFC for Drum Motor

QCNW-8021AJZZ

V FFC for A/C Head

QPWBF5243AJZZ

V A/C Head PWB

QSOCN0696REZZ V Socket, 6 pin

RHEDT0036AJZZ

V Full Erase Head

RHEDU0088GEZZ

J A/C Head Ass’y

RMOTM1078GEZZ J Loading Motor

RMOTN2067GEZZ J Capstan D.D. Motor

RMOTP1139GEZZ J Drum Drive Motor

(VC-H810U)

RMOTP1151GEZZ J Drum Drive Motor

(VC-A410U)

DDRMW0029TEX1 V Upper and Lower

Drum Ass’y(VC-A410U)

DDRMW0030TEX1 V Upper and Lower

Drum Ass’y(VC-H810U)

QBRSK0041GEZZ

J Drum Earth Brush

XBPSD26P05J00

V Drum Drive Motor

Mounting Screw
(SW2.6P+5S)

PGiDC0056GEFW

J Drum Base

QPWBF5468AJZZ

V PWB(LDG Motor)

QPLGZ0292GEZZ

J Socket(LDG Motor)

MSPRC0223AJFJ

V Azimuth Spring

MSPRC0224AJFJ

V Height Adjusting Spring

SCREW, NUTS AND WASHERS

201

XBPSD26P08000

V Screw 2.6P+8S A/C Head AA

202

LX-HZ3082GEZZ

J WSW 2.6+6 (AC)

203

XJPSD26P06000

V Screw, C2.6P+6S

(For Capstan Motor)

207

XHPSD30P08WS0 V Screw, C3.0P+8S

(For Drum Base)

208

XRESJ30-06000

V E-Ring, E-3

209

XWHJZ31-03052

V Washer, W3.1-5.2-0.3

210

XWHJZ31-04052

V Washer, W3.1-5.2-0.4

211

XWHJZ31-05052

V Washer, W3.1-5.2-0.5

212

XWHJZ31-06052

V Washer, W3.1-5.2-0.6

213

XWHJZ31-07052

V Washer, W3.1-5.2-0.7

214

PSPAP0009AJZZ

V Reverse Guide Adjusting

Nut

216

LX-WZ1041GE00

J CW 2.6-6-0.5 CAM

218

XBPSD30P06J00

V Drum Base Mounting

Screw(SW 3P+6S)

219

LX-WZ1098GE00

J CW 2.6-4.7-0.5 RED

220

LX-BZ3096GEFD

J Tilt Adjusting Screw

221

XBPSD26P06000

V Azimuth Adjusting Screw

2.6+6S

222

LX-BZ3197GEFD

J Screw(A/C Head)

223

XWHJZ31-08052

V Washer, W3.1-5.2-0.8

CASSETTE HOUSING CONTROL PARTS

300

CHLDX3081TEV2

V Cassette Housing Control

Ass’y

301

LANGF9592AJFW

V Upper Plate

302

LHLDX1028AJ00

V Frame (L)

303

LHLDX1030AJZZ

V Holder (L)

Summary of Contents for VC-A410U

Page 1: ...to its original condition and only parts identical to those specified be used MODELS VC A410U VC H810U 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 31 6 MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE 33 7 TROUBLESHOOTING 39 8 BLOCK DIAGRAM 50...

Page 2: ...trol 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 resis...

Page 3: ...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 essai Uti...

Page 4: ... 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 the s...

Page 5: ...TIONS Format VHS NTSC Standard Video Recording System Rotary Slant Azimuth 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 Hi Fi model 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 ...

Page 6: ...rding with the Timer 3 VCR LED indicator This indicator lights up when selecting VCR by using the TV VCR button 4 REC LED indicator This indicator lights up on during recording This indicator flashes during REC Pause 5 TAMPER PROOF LED indicator This indicator lights up when the set mode is locked 6 Remote Sensor Point Remote Control at this window Cassette compartment see Playback Recording POWER...

Page 7: ...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 SHIELD ANGLE TOP CABINET TOP CABINET FIX ANGLE OPERATION PWB LED HOLDER MECHANISM MAIN PWB ASSEMBLY ANTENNA TERMINAL COVER ANTENNA TERMINAL...

Page 8: ...tenna terminal 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: ...ition 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 For other fix...

Page 10: ...y 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: ... 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: ...he 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 adjusting the torque of take up and supply reel disks Master Plane Jig and Reel Disk Height Adjusting Jig Pinch pressing force measuring jig This Jig is used with the tensi...

Page 13: ...normal 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 liqu...

Page 14: ...ontact 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 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...

Page 15: ...here 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 Figure 4 6 ...

Page 16: ...rt 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 second...

Page 17: ...turn it 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 Set value EP6 9 2 5mN m 70 25gf cm 500g Cassette torque meter Figure 4 10 Checking 1 Make sure that value is within the setting 6 9 2 5mN m 70 25gf cm 2 The winding up torque fluctuates due to variation of rotation torque of limiter pulley ass y Read the...

Page 18: ...GTHEVIDEOSEARCHREWIND 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 seco...

Page 19: ... 4 13 CHECKING AND ADJUSTMENT OF RECORD PLAYBACK BACK TENSION Remove the cassette housing 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 powe...

Page 20: ...hebraketorqueatthesupplysideandthe 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 the s...

Page 21: ...n 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 Height s...

Page 22: ...ower 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 height ad j...

Page 23: ...o 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 initial sett...

Page 24: ...he 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 by the me...

Page 25: ...on 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 does no...

Page 26: ... 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 sc...

Page 27: ...r 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 counterclockwi...

Page 28: ...r 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 Inser...

Page 29: ...nt 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 Fully tur...

Page 30: ...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 31: ...ds 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 VROEFZCS or VROEFZHS Screwdriver for adjustment Color bar generator RF signal generator TP201 204 R70...

Page 32: ... is 5 5H lines ahead of the vertical sync as shown in Figure 5 2 5 Cancel the short circuited Figure 5 2 5 5 0 5H lines CH 1 HEAD SWITCHING PULSE CH 2 VIDEO OUT CH 1 1V dev 50µsec dev CH 2 2V dev 50µsec dev V sync 1 Play a cassette which was recorded by the unit in SP mode 2 Press the PAUSE STILL button to freeze the picture 3 Look at the monitor screen and adjust or TRACK ING buttons so that the ...

Page 33: ...urns 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 load...

Page 34: ...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 is at ...

Page 35: ...ing 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 counter...

Page 36: ...m 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 37: ...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 Check ...

Page 38: ...nd 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 39: ...d 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 primary circuit part L901 D901 904 T901 C906 R904 Q901 902 etc Check for short circuiting of rectifying diode and cir...

Page 40: ...pin 11 of IC706 Check IC706 Check between IC706 and loading motor Replace loading motor Is the specified voltage about 10V applied at the loading motor terminal when the cassette tape is inserted Does pin 13 of IC706 change to about 10V when the cassette tape is inserted Does pin 11 of IC706 go to a H about 1 7V level when the cassette tape is inserted Does pin 79 of IC701 change from H to L level...

Page 41: ... NO NO NO NO YES YES YES NO NO NO FLOW CHART NO 10 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 11 The capstan mot...

Page 42: ...otor 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 line bet...

Page 43: ...pheral 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 line betw...

Page 44: ...01 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 the A C...

Page 45: ...9 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 applied t...

Page 46: ...1 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 ...

Page 47: ... 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 1...

Page 48: ...3 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 line Re...

Page 49: ...usted 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 R617 ...

Page 50: ...VC A410U VC H810U VC A410U VC H810U 50 51 8 BLOCK DIAGRAM SYSTEM SERVO BLOCK DIAGRAM ...

Page 51: ...0U VC H810U 52 53 SIGNAL FLOW BLOCK DIAGRAM VC A410U 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 52: ...0U VC H810U 54 55 SIGNAL FLOW BLOCK DIAGRAM VC H810U 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 53: ...56 VC A410U VC H810U POWER CIRCUIT BLOCK DIAGRAM ...

Page 54: ...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 subjec...

Page 55: ...0U VC A410U VC H810U 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 56: ...VC A410U VC H810U VC A410U VC H810U 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 57: ...VC A410U VC H810U VC A410U VC H810U 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 58: ...VC A410U VC H810U VC A410U VC H810U 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 59: ...66 VC A410U VC H810U 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 60: ...67 VC A410U VC H810U 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 ...

Page 61: ...VC A410U VC H810U VC A410U VC H810U 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 62: ...VC A410U VC H810U VC A410U VC H810U 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 63: ...72 VC A410U VC H810U M E M O ...

Page 64: ...C3939SQR AC Q603 VS2SC3052EF 1 V 2SC3052EF AC Q651 VS2SD1306 E1E V 2SD1306 E VC H810U AD Q652 VS2SD1306 E1E V 2SD1306 E VC H810U AD Q653 VSKRA104S 1 V KRA104S VC H810U AA Q654 VSKRC103S 1 V KRC103S VC H810U AA Q656 VSKRC103S 1 V KRC103S VC H810U AA Marking Fig 1 3 1 2 1 Base Input 2 Emitter Ground 3 Collector Output HOW TO IDENTIFY CHIP TRANSISTORS AND DIODES BY ITS MARKING Package Marking Parts N...

Page 65: ...7 16V Ceramic AA VC H810U Q704 VS2SA1530ARS1 V 2SA1530ARS1 AC Q705 VS2SC3052EF 1 V 2SC3052EF AC Q706 VS2SA1530ARS1 V 2SA1530ARS1 AC Q710 VS2SC3052EF 1 V SC3052EF AC Q711 VS2SC3052EF 1 V 2SC3052EF AC Q861 VSKRA103S 1 V KRA103S AA Q863 VS2SC3052EF 1 V 2SC3052EF AC Q864 VS2SC3052EF 1 V 2SC3052EF AC Q865 VS2SC3052EF 1 V 2SC3052EF AC Q866 VS2SC3052EF 1 V 2SC3052EF AC å Q901 VS2SC4161 1E V 2SC4161 AL å ...

Page 66: ...0 16V Electrolytic AB VC H810U C169 VCEA9M1HW105M V 1 50V Electrolytic AB VC H810U C170 VCFYFA1HA124J V 0 12 50V M polypro AC VC H810U C201 VCEA9M0JW107M V 100 6 3V Electrolytic AB C202 VCKYCY0JF105Z V 1 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 ...

Page 67: ... AA R315 VRS CY1JF152J V 1 5k 1 16W Metal Oxide AA R330 VRS CY1JF222J V 2 2k 1 16W Metal Oxide AA R331 VRS CY1JF102J V 1k 1 16W Metal Oxide AA R351 VRS CY1JF102J V 1k 1 16W Metal Oxide AA VC H810U R501 VRS CY1JF681J V 680 1 16W Metal Oxide AA C680 VCKYCY0JF105Z V 1 6 3V Ceramic AB VC H810U C681 VCKYCY1HF103Z V 0 01 50V Ceramic AA VC H810U C682 VCKYCY0JF105Z V 1 6 3V Ceramic AB VC H810U C684 VCCCCY...

Page 68: ...CY1JF563J V 56k 1 16W Metal Oxide AA R764 VRS CY1JF183J V 18k 1 16W Metal Oxide AA R765 VRS CY1JF223J V 22k 1 16W Metal Oxide AA R766 VRS CY1JF103J V 10k 1 16W Metal Oxide AA R768 VRS CY1JF102J V 1k 1 16W Metal Oxide AA R769 VRS CY1JF472J V 4 7k 1 16W Metal Oxide AA R770 VRS CY1JF332J V 3 3k 1 16W Metal Oxide AA R772 VRS CY1JF822J V 8 2k 1 16W Metal Oxide AA VC A410U R773 VRS CY1JF222J V 2 2k 1 16...

Page 69: ...VRD RA2BE102J V 1k 1 8W Carbon AA R924 VRS CY1JF102J V 1k 1 16W Metal Oxide AA R930 VRD RA2BE332J V 3 3k 1 8W Carbon AA R931 VRS CY1JF102J V 1k 1 16W Metal Oxide AA R932 VRD RA2BE101J V 100 1 8W Carbon AB R933 VRS CY1JF102J V 1k 1 16W Metal Oxide AA R934 VRS CY1JF102J V 1k 1 16W Metal Oxide AA R951 VRD RM2HD152J V 1 5k 1 2W Carbon AA R954 VRS CY1JF561J V 560 1 16W Metal Oxide AA R955 VRS CY1JF103J...

Page 70: ...nect Gear AD 37 NGERH1295AJ00 V Master Cam AE 38 NGERH1294AJZZ V Casecon Drive Gear AD 39 NGERH1270AJZZ V Take up Loading Gear AF 40 NGERH1271AJZZ V Supply Loading Gear AD 41 NGERH1272AJZZ V Pinch Drive Cam AE 43 NGERH1299AJZZ V Reel Relay Gear AE 44 NGERW1070AJZZ V Worm Gear AD 45 NGERW1066AJZZ V Worm Wheel Gear AD 46 NiDR 0018AJZZ V Idler Wheel Ass y AK 47 NPLYV0162AJZZ V Motor Pulley AD 48 NPLY...

Page 71: ...AD 612 LHLDZ1962AJ00 V Sensor LED Cover AD 613 PGUMS0026AJZZ V Foot Cushion AB 614 TLABM4190AJZZ V Model Label VC A410U AC 614 TLABM4189AJZZ V Model Label VC H810U AC 614 TLABM4210AJZZ V Model Label AC VC A410U for Canada 614 TLABM4209AJZZ V Model Label AC VC H810U for Canada 615 XJPSD30P10WS0 V Screw AA 616 LHLDP1197AJZZ V LED Holder AC FRONT PANEL PARTS 500 CPNLC2721TEV1 V Front Panel Ass y AU V...

Page 72: ... 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 68 69 55 16 202 222 221 201 202 202 220 59 70 57 71 56 32 22 63 62 66 66 66 66 65 62 ...

Page 73: ...rt No Description Code Ref No Part No Description Code 82 VC A410U VC H810U CASSETTE HOUSING CONTROL PARTS A B C D E F G H 1 2 3 4 5 6 301 303 311 311 304 306 309 305 312 316 315 307 314 310 317 313 302 308 300 ...

Page 74: ...ption Code Ref No Part No Description Code 83 VC A410U VC H810U CABINET PARTS A B C D E F G H 1 2 3 4 5 6 A B C C B 600 609 615 602 612 605 604 603 607 608 610 614 606 601 615 609 613 605 A VC A410U VC H810U 615 602 616 611 ...

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 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 s...

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