Sharp vc-ga56z Service Manual Download Page 65

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Ref. No.

Part No.

★

Description

Code

Ref. No.

Part No.

★

Description

Code

VC-GA56Z
VC-GH96Z

R521

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R601

VRS-CY1JF822J

V 8.2k 1/16W

Metal Oxide

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

R607

VRS-CY1JF561J

V 560 1/16W

Metal Oxide

R608

VRS-CY1JF472J

V 4.7k 1/16W

Metal Oxide

R609

VRS-CY1JF333J

V 33k 1/16W

Metal Oxide

(VC-GA56Z)

R610

VRS-CY1JF183J

V 18k 1/16W

Metal Oxide

(VC-GA56Z)

R611

VRS-CY1JF153J

V 15k 1/16W

Metal Oxide

(VC-GH96Z)

R611

VRS-CY1JF393J

V 39k 1/16W

Metal Oxide

(VC-GA56Z)

R612

VRS-CY1JF123J

V 12k 1/16W

Metal Oxide

(VC-GA56Z)

R612

VRS-CY1JF823J

V 82k 1/16W

Metal Oxide

(VC-GH96Z)

R613

VRS-CY1JF393J

V 39k 1/16W

Metal Oxide

(VC-GA56Z)

R614

VRS-CY1JF123J

V 12k 1/16W

Metal Oxide

(VC-GA56Z)

R615

VRS-CY1JF472J

V 4.7k 1/16W

Metal Oxide

(VC-GA56Z)

R616

VRS-CY1JF103J

V 10k 1/16W

Metal Oxide

(VC-GA56Z)

R617

VRS-CY1JF103J

V 10k 1/16W

Metal Oxide

(VC-GH96Z)

R618

VRS-CY1JF563J

V 56k 1/16W

Metal Oxide

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

R623

VRS-CY1JF393J

V 39k 1/16W

Metal Oxide

R624

VRS-CY1JF224J

V 220k 1/16W

Metal Oxide

R626

VRS-CY1JF000J

V 0

1/16W

Metal Oxide

R627

VRS-CY1JF332J

V 3.3k 1/16W

Metal Oxide

R628

VRS-CY1JF000J

V 0

1/16W

Metal Oxide

(VC-GA56Z)

R653

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R654

VRS-CY1JF682J

V 6.8k 1/16W

Metal Oxide

(VC-GH96Z)

R655

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R656

VRS-CY1JF682J

V 6.8k 1/16W

Metal Oxide

(VC-GH96Z)

R657

VRS-CY1JF101J

V 100 1/16W

Metal Oxide

(VC-GH96Z)

R658

VRS-CY1JF223J

V 22k 1/16W

Metal Oxide

(VC-GH96Z)

R659

VRD-RA2BE681J

V 680 1/8W

Carbon

(VC-GH96Z)

R663

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R664

VRS-CY1JF682J

V 6.8k 1/16W

Metal Oxide

(VC-GH96Z)

R665

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R666

VRS-CY1JF682J

V 6.8k 1/16W

Metal Oxide

(VC-GH96Z)

R667

VRD-RA2BE101J

V 100 1/8W

Carbon

(VC-GH96Z)

R668

VRS-CY1JF223J

V 22k 1/16W

Metal Oxide

(VC-GH96Z)

R669

VRD-RA2BE681J

V 680 1/8W

Carbon

(VC-GH96Z)

R670

VRS-CY1JF273J

V 27k 1/16W

Metal Oxide

(VC-GH96Z)

R671

VRS-CY1JF103J

V 10k 1/16W

Metal Oxide

(VC-GH96Z)

R672

VRS-CY1JF151J

V 150 1/16W

Metal Oxide

(VC-GH96Z)

R673

VRS-CY1JF151J

V 150 1/16W

Metal Oxide

(VC-GH96Z)

R674

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R675

VRS-CY1JF183J

V 18k 1/16W

Metal Oxide

(VC-GH96Z)

R676

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

(VC-GH96Z)

R677

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

(VC-GH96Z)

R685

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

(VC-GH96Z)

R686

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

(VC-GH96Z)

R690

VRS-CY1JF000J

V 0

1/16W

Metal Oxide

(VC-GH96Z)

R703

VRD-RA2BE102J

V 1k

1/8W

Carbon

R704

VRD-RA2BE102J

V 1k

1/8W

Carbon

R705

VRD-RA2BE102J

V 1k

1/8W

Carbon

R706

VRS-CY1JF153J

V 15k 1/16W

Metal Oxide

R707

VRS-CY1JF153J

V 15k 1/16W

Metal Oxide

R708

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

R709

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

(VC-GH96Z)

R710

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

R711

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

R712

VRS-CY1JF223J

V 22k 1/16W

Metal Oxide

R713

VRS-CY1JF564J

V 560k 1/16W

Metal Oxide

R714

VRS-CY1JF332J

V 3.3k 1/16W

Metal Oxide

R715

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

R716

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

R717

VRS-CY1JF681J

V 680 1/16W

Metal Oxide

R718

VRS-CY1JF182J

V 1.8k 1/16W

Metal Oxide

R719

VRD-RA2BE102J

V 1k

1/8W

Carbon

R720

VRS-CY1JF822J

V 8.2k 1/16W

Metal Oxide

(VC-GA56Z)

R722

VRD-CY1JF102J

V 1k

1/16W

Metal Oxide

R723

VRS-CY1JF000J

V 0

1/16W

Metal Oxide

R725

VRD-RA2BE104J

V 100k 1/8W

Carbon

(VC-GA56Z)

R725

VRD-RA2BE183J

V 18k 1/8W

Carbon

(VC-GH96Z)

R726

VRS-CY1JF103J

V 10k 1/16W

Metal Oxide

R727

VRD-RA2EE151J

V 150 1/4W

Carbon

R728

VRS-CY1JF182J

V 1.8k 1/16W

Metal Oxide

R729

VRD-RA2BE154J

V 150k 1/8W

Carbon

R731

VRS-CY1JF103J

V 10k 1/16W

Metal Oxide

R732

VRS-CY1JF223J

V 22k 1/16W

Metal Oxide

R734

VRD-RA2BE223J

V 22k 1/8W

Carbon

R735

VRS-CY1JF563J

V 56k 1/16W

Metal Oxide

R736

VRS-CY1JF123J

V 12k 1/16W

Metal Oxide

R737

VRS-CY1JF000J

V 0

1/16W

Metal Oxide

R738

VRD-RA2BE104J

V 100k 1/8W

Carbon

R739

VRD-RA2BE271J

V 270 1/8W

Carbon

R740

VRD-RA2BE104J

V 100k 1/8W

Carbon

R741

VRD-RA2BE271J

V 270 1/8W

Carbon

R742

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

R743

VRD-RA2BE391J

V 390 1/8W

Carbon

R744

VRS-CY1JF473J

V 47k 1/16W

Metal Oxide

R745

VRD-RA2BE391J

V 390 1/8W

Carbon

R746

VRS-CY1JF103J

V 10k 1/16W

Metal Oxide

R747

VRD-RA2EE151J

V 150 1/4W

Carbon

R748

VRS-CY1JF1R0J

V 1

1/16W

Metal Oxide

R749

VRD-RM2HD271J

V 270 1/2W

Carbon

R750

VRS-CY1JF474J

V 470k 1/16W

Metal Oxide

R751

VRD-RA2BE123J

V 12k 1/8W

Carbon

R752

VRD-RA2BE123J

V 12k 1/8W

Carbon

R754

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

R756

VRS-CY1JF102J

V 1k

1/16W

Metal Oxide

DUNTK5898TEV1 (VC-GA56Z)
DUNTK5898TEV2 (VC-GH96Z)

MAIN UNIT

Summary of Contents for vc-ga56z

Page 1: ...IDEO CASSETTE RECORDER CONTENTS Page 1 GENERAL INFORMATION 3 2 DISASSEMBLY AND REASSEMBLY 5 3 FUNCTION OF MAJOR MECHANICAL PARTS 8 4 ADJUSTMENT REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS 10 5 ELECTRICAL ADJUSTMENT 29 6 MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE 31 7 TROUBLESHOOTING 37 8 BLOCK DIAGRAM 48 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN 57 10 PARTS LIST 71 11 EXPLODED VIEW OF...

Page 2: ... 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 3: ...ording System Rotary Slant Azimuth Two Head Helical Scan Number of Video Heads 4 Video Signal Standard NTSC Color System Audio Recording System 1 Stationary Head for Linear Audio 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 66 i p s playback only EP 11 12 mm sec 0 44 i p s Maximum Recording Time SP 160 min T 1...

Page 4: ...4 VC GA56Z VC GH96Z VC GA56Z VC GH96Z 1 3 LOCATION OF MAJOR COMPONENTS AND CONTROL ...

Page 5: ...AIN FRAME TOP CABINET FIX ANGLE 2 DISASSEMBLY AND REASSEMBLY 2 1 DISASSEMBLY OF MAJOR BLOCKS TOP CABINET Remove 2 screws 1 FRONT PANEL Remove button 2 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...

Page 6: ... the PWB bottom plate 1 screw 2 Remove the FFC cable AA AD AH 3 which con necting 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 VC GH96Z CASSETTE HOUSING MECHANISM CHASSIS 4 1 3 2 MAIN PWB ...

Page 7: ... 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 mechanism to the main PWB install two housings Fit the antenna cover to one of them For other fix the vicinity of...

Page 8: ... 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 9: ... MAJOR MECHANICAL 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 ...

Page 10: ...hethreaded hole using resin with screw use the jig Specified torque 5 kg Thiscassettetorquemeterisusedforcheck 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 tension gauge...

Page 11: ...ion 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 Replace the roller of the cleaner when it wears down Just change the AHC roller assembly for new one Screen swaying Cassette not loaded or unloaded No tape running tape slack Tape slack...

Page 12: ... gear causes malfunction The cassette cannot be set load and ejection are repeated 3 In the case when you use the magnet screw driver never approach the magnet driver to the A C head FE head and drum 4 When installing or removing take care so that the cassette housing control and tool do not contact the guide pin or drum 5 After installing the cassette housing control once per form cassette loadin...

Page 13: ...y around the reel disk and insert into the hole of tension arm ass y 4 Assemble the Supply main brake ass y Notes 1 When installing the reel disk take due care so that the tension band ass y is not deformed and grease does no adhere 2 Do not damage the Supply main brake ass y Be careful so that grease does not adhere to the brake surface Reassembly Take up reel disk 1 Clean the reel disk shaft and...

Page 14: ... cm Adjustment 1 If the FF winding up torque is less than the specified value clean the capstan D D motor pulley drive belt and limiter pulley with cleaning liquid and check again 2 If the torque is less than the set value replace the reel belt Notes 1 Hold the torque gauge by hand so that it is not moved 2 Do not keep the reel disk in lock state Do not allow long time measurement 4 7 CHECKING AND...

Page 15: ...with tape Load the cassette torque meter into the unit Put the weight 500g on the cassette torque meter Turn on the power switch Press the picture record button and set EP picture record mode x3 500g Set value EP6 9 2 5mN m 70 25gf cm Cassette torque meter 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...

Page 16: ...ller from the capstan shaft Do not separate excessively Or the pinch lever and pinch double action lever may disengage 2 Engage the tension gauge adapter with the pinch roller shaft and pull in the arrow direction 3 Gradually return the pinch roller and measure the pulling force when the pinch roller contacts the capstan shaft 4 Make sure that the measured value is within setting 9 0 N to 11 8 N 9...

Page 17: ...n pole adjuster Figure 4 18 Adjust so that the delta mark of tension pole adjuster is within 90 range 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 ...

Page 18: ...n 2 9 to 9 8mN m 30 to 100gf cm Figure 4 20 Tension arm Tension spring B A Torque gauge CCW CW Supply reel disk Checking the brake torque at the take up side CCW 4 9 13 7mN m 50 140gf cm CW 3 9 10 8mN m 40 110gf cm Remove the cassette housing control assembly After short circuiting TP803 and TP802 provided at operation PWB plug in the power cord Setting 1 Switch from the FF mode to the STOP mode 2...

Page 19: ...ection and A C head front section Seethefigurebe low 3 Align the left end of gear of A C head arm with the punchedmarkofchassis tentativelytightenthescrews 1 and 2 so as to ensure smooth motion of A C head arm Tentative tightening torque must be 0 15 to 0 20 N m 1 5 to 2 0kgf cm Note 1 If the screws 1 and 2 are tighten tentatively too loose the azimuth and height of A C head may change when they a...

Page 20: ...e lower flange to 13 38 mm using the reverse guide height adjustment jig in tape loading state Refer to Figure 4 28 a b Reverse guide height adjusting jig Reverse guide Mechanism chassis Reverse guide height adjusting jig 13 38mm Figure 4 28 a b 2 Rotate counterclockwise the reverse guide height ad justment nut 1 10 turn For height adjustment use the reverseguideheightadjustmentboxdriver JiGDRiVER...

Page 21: ...er flange Notes 1 Previously set the tracking control in the center posi tion and adjust the envelop waveform to maximum with X value adjustment nut Thereby the tape run rough adjustment is facilitated 2 Especially the outlet side envelope waveform must have higher flatness 2 Adjustment of A C head height and azimuth 1 Perform the initial setting of A C head position by the method stated in 4 15 R...

Page 22: ...ted in counterclock wise direction raises guide roller to make the tape float above the helical lead The supply side guide roller is then rotated in the clockwise direction to flatten the envelope Take up side guide roller rotated in counterclock wise direction raises guide roller to make the tape float above the helical lead The take up side guide roller is then rotated in the clockwise direction...

Page 23: ...moval 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 Taking care so that the capstan shaft does not contact the mechanism chassis set its position on the mecha nism chassis and then install with the three screws 2 Install the slow brake lever 3 Install the reel belt Notes 1 Before installing the capstan D D mo...

Page 24: ...PLACING THE UPPER AND LOWER DRUM ASSEMBLY Replacement Perform in the numerical order 1 Remove the motor as stated in 4 20 D D motor re placement 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 screwdriv...

Page 25: ...Insert pinch drive cam Turn the reverse guide lever assembly counterclockwise to the stopper 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 Pinch drive lever ass y Pinch Roller Double Action Lever Ass y Phase Matching P...

Page 26: ...hase Matching point 2 as shown below 4 Finally fix the inserts 1 and 4 4 23 INSTALLING THE SHIFTER Figure 4 42 Capstan D D motor Reel pulley Drum Bottom side of mechanism chassis Phase Matching point 2 Loading gear T Round mark Insert point 1 Shaft 1 Half round notch Sifter Insert point 3 Insert point 2 Insert point 4 Shaft 1 Shaft 4 Insert point 5 Rotation point 2 Shaft 1 Phase matching point 1 R...

Page 27: ...and the casecon drive gear 3 Finally fix with the E ring 4 25 REPLACEMENT OF LOADING MOTOR Removal Replacement Remove the loading motor and install the replacement loading motor as shown below 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 turn counterclockwise Face t...

Page 28: ...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: ...as video heads Checkthatthemechanismandallelectriccomponentsareingoodworkingconditionpriortotheadjustments 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 P201 TP201 204 R701 Figure 5 1...

Page 30: ...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 recorded by the unit being adjusted 5 2 ADJUSTMENT OF FV False Vertical Sync OF STILL PICTURE 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 TRACKIN...

Page 31: ... 812 CA END CS EJ UL PU1 PU2 VSR PB SLOW FF STOP Mode detection outside Mode detection inside S sensor EJ UL PU PU2 VSR PB SLW FF STP 0 1 1 0 1 1 0 0 0 0 0 1 0 0 1 or 0 Loading motor 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 clockwi...

Page 32: ...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 33: ...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 34: ...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 35: ...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 36: ...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 37: ...e Check AT 24V line Is the supply voltage of 24V feed to pin 1 of IC801 Are grid and segment signals supplied to the indication tube DG801 from the indication tube driver IC IC801 Replace IC801 Is supply filament voltage feed between pin 1 2 and 31 32 of the flourescent display tube Check power circuit and D952 Check the periphery of fluorescent indication tube and main block Check that the fluore...

Page 38: ... 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 H about 4 7V level when the cassette tape is inserted Does pin 79 of IC701 change from H to L level when the cassette tape is inserted Does start sensor shutter open when the cassette tape is inserted NO NO NO FLOW CHART NO 9 A cassette tape is t...

Page 39: ...es 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 10 The cassette tape fails to eject Does the capstan motor start when the EJECT button is pressed See FLOW CHART NO 12 Does the take up reel disk turn when the capstan motor is...

Page 40: ...t of pin 46 of IC701 Check IC701 NO NO NO YES YES YES Check between pin 46 of IC701 and all the way up to pin 2 of IC706 Is the voltage more than about 2 6V applied at pin 2 of IC706 NO YES Check PC 5V line Is the supply voltage of 5V feed to pin 3 of IC706 Is the supply voltage of 12V feed to pin 21 of IC706 Check or replace drum motor Check AT 12V line Check or replace drum motor Check line betw...

Page 41: ...50 of IC701 C770 C771 R770 and their peripheral circuits Check drum FG signal line Is there head switching pulse at pin 23 of IC701 NO See FLOW CHART NO 15 YES YES Are there drum APC output at pin 34 of IC701 and drum AFC output at pin 32 of IC701 NO Replace IC701 YES YES Is there drum control voltage input at pin 2 of IC706 YES Is pin 46 of IC701 in high impedance NO YES NO Check line between pin...

Page 42: ...3 of IC701 Replace IC701 Replace A C head YES 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 Is there PB CTL signal at pin 76 of IC701 Replace IC701 Is there REC CTL signal at pins 75 and 74 of IC701 Is there PB CTL signal at pin 76 of IC701 Does A C head operate normally Adjust the height of the A C ...

Page 43: ...at pin 49 of IC701 Is there picture output signal at 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 there picture output signal at emitter of Q251 video output buffer 1 Line output Check Q251 periphery and output terminal periphery 2 RF output Check Q251 periphery and tuner pin 6 periphery Doe...

Page 44: ...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 45: ... 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 46: ...f rear input terminal Is there SIF signal from pin 22 of Tuner Line output terminal Check line ranging from pins 53 and 57 of IC651 to the audio output terminal RF output terminal Check line ranging from pin 59 of IC651 to pin 2 of tuner TU101 Is Sub carrier signal 3 58MHz about 900m Vp p input to pin 45 of IC651 Is H level applied at pin 45 of IC651 NO Check line between pin 36 of IC651 and pin 2...

Page 47: ...ight 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 pin 100 of IC201 Replace IC201 Is pin 99 of IC201 in L level Check the line between pin 11 of IC201and pin 62 of IC651 FLOW CHART NO 27 Check the periphery of pin 99 of IC201 R617 ...

Page 48: ...49 VC GA56Z VC GH96Z 48 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H 8 BLOCK DIAGRAM POWER CIRCUIT BLOCK DIAGRAM ...

Page 49: ...51 VC GA56Z VC GH96Z 50 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H SYSTEM SERVO BLOCK DIAGRAM ...

Page 50: ... 7 6 5 4 3 2 1 A B C D E F G H SIGNAL FLOW BLOCK DIAGRAM VC GA56Z 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: ... 7 6 5 4 3 2 1 A B C D E F G H SIGNAL FLOW BLOCK DIAGRAM VC GH96Z 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: ...de voltage is indi cated as follows 4 0 Record mode SP 4 0 PB mode SP 4 0 LP mode 4 0 EP mode NOTES 1 The unit of resistance ohm is omitted K 1000 ohms M 1 Meg ohm 2 All resistors are 1 16 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...

Page 53: ...57 VC GA56Z VC GH96Z 17 16 19 18 15 14 13 12 11 10 6 5 4 3 2 1 A B C D E F G H 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN OPERATION CIRCUIT VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 54: ...59 VC GA56Z VC GH96Z 58 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN CIRCUIT 1 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses R747 150 1 4W S703 K0098G E RESET ...

Page 55: ...61 VC GA56Z VC GH96Z 60 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN CIRCUIT 2 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 56: ...63 VC GA56Z VC GH96Z 62 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN CIRCUIT 3 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses FZ026SCEZZ ...

Page 57: ...65 VC GA56Z VC GH96Z 64 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN CIRCUIT 4 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 58: ...67 VC GA56Z VC GH96Z 66 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H PWB FOIL PATTERN MAIN PWB Component Side ...

Page 59: ...69 VC GA56Z VC GH96Z 68 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MAIN PWB Wiring Side ...

Page 60: ...70 VC GA56Z VC GH96Z 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 6 5 4 3 2 1 A B C D E F G H OPERATION PWB Component Side Wiring Side ...

Page 61: ...T REPLACEMENT ITEM TUNER TU101 RTUNQ0001AJZZ V Tuner BE INTEGRATED CIRCUITS IC201 VHiHA8317NF 1 V HA118317NF Y C Audio AZ Processor IC601 VHiBA7755A 1 V BA7755A REC PB Head AE SW IC651 VHiAN3662FB 1 V AN3662FBP HiFi Audio AZ Processor VC GH96Z IC701 RH iX1566GEN2 J IX1566GE AY IC702 VHiPST600K 1 V PST600K AE IC706 VHiLB1988 1 V LB1988 Loading Drum M AQ Driver IC IC801 VHiMN12511 1 V MN12511 AQ IC9...

Page 62: ... RCiLP0161CEZZ V Coil 10µH AD TRANSFORMERS T601 RTRNH0098GEZZ J Osc Transformer AE or RTRNH0086GEZZ J Osc Transformer AD å T901 RTRNZ0050AJZZ V Transformer AR CONTROL R701 RVR M4343GEZZ J 100k PG MM AB CAPACITORS C101 VCKYCY1HB221K V 220p 50V Ceramic AA C102 VCCCCY1HH101J V 100p 50V Ceramic AA VC GA56Z C103 VCEA9M0JW107M V 100 6 3V Electrolytic AB C105 VCEA0A0JW108M V 1000 6 3V Electrolytic AC C10...

Page 63: ... 50V Electrolytic AB C607 VCEA9M1HW475M V 4 7 50V Electrolytic AB C608 VCEA9M0JW226M V 22 6 3V Electrolytic AB C609 VCEA9M1HW475M V 4 7 50V Electrolytic AB C610 VCKYCY1CF104Z V 0 1 16V Ceramic AA VC GA56Z C611 VCKYCY1CF104Z V 0 1 16V Ceramic AA C612 VCKYCY1CF104Z V 0 1 16V Ceramic AA VC GA56Z C613 VCKYCY1EB183K V 0 018 25V Ceramic AA VC GA56Z C614 VCKYCY1HB222K V 2200p 50V Ceramic AA C617 VCEA9M1C...

Page 64: ...AB å C923 VCEA0A1VW477M V 470 35V Electrolytic AB å C924 VCEA0A1HW226M V 22 50V Electrolytic AB å C925 VCEA0A0JW108M V 1000 6 3V Electrolytic AC å C926 VCEA0A0JW107M V 100 6 3V Electrolytic AB å C927 VCKYCY1HF103Z V 0 01 50V Ceramic AA å C928 VCEA0A1CW337M V 330 16V Electrolytic AC å C929 VCEA0A0JW108M V 1000 6 3V Electrolytic AC C932 VCQYTA1HM104J V 0 1 50V Mylar AA C933 VCQYTA1HM104J V 0 1 50V M...

Page 65: ...3 VRS CY1JF151J V 150 1 16W Metal Oxide AA VC GH96Z R674 VRS CY1JF473J V 47k 1 16W Metal Oxide AA VC GH96Z R675 VRS CY1JF183J V 18k 1 16W Metal Oxide AA VC GH96Z R676 VRS CY1JF102J V 1k 1 16W Metal Oxide AA VC GH96Z R677 VRS CY1JF473J V 47k 1 16W Metal Oxide AA VC GH96Z R685 VRS CY1JF102J V 1k 1 16W Metal Oxide AA VC GH96Z R686 VRS CY1JF102J V 1k 1 16W Metal Oxide AA VC GH96Z R690 VRS CY1JF000J V ...

Page 66: ...Carbon AA å R910 VRD RM2HD390J V 39 1 2W Carbon AA å R912 VRD RM2HD390J V 39 1 2W Carbon AA å R917 VRS CY1JF123J V 12k 1 16W Metal Oxide AA å R918 VRS CY1JF000J V 0 1 16W Metal Oxide AA R920 VRD RM2HD154J V 150k 1 2W Carbon AA å R921 VRS CY1JF100J V 10 1 16W Metal Oxide AA å R922 VRS CY1JF000J V 0 1 16W Metal Oxide AA R923 VRD RA2BE102J V 1k 1 8W Carbon AA R924 VRS CY1JF102J V 1k 1 16W Metal Oxide...

Page 67: ... AA R883 VRS CY1JF822J V 8 2k 1 16W Metal Oxide AA R884 VRS CY1JF103J V 10k 1 16W Metal Oxide AA R885 VRS CY1JF223J V 22k 1 16W Metal Oxide AA R886 VRS CY1JF103J V 10k 1 16W Metal Oxide AA R887 VRS CY1JF473J V 47k 1 16W Metal Oxide AA R888 VRS CY1JF123J V 12k 1 16W Metal Oxide AA R889 VRS CY1JF563J V 56k 1 16W Metal Oxide AA R897 VRD RA2BE563J V 56k 1 8W Carbon AA R898 VRD RA2BE223J V 22k 1 8W Car...

Page 68: ...00 V Double Action Rack Gear AE 316 NGERR3005AJFW V Drive Angle Gear AG 317 NSFTD0041AJFD V Main Shaft AH CABINET PARTS 600 GCABA3131AJSA V Top Cabinet AR 601 GCABB1223AJSF V Main Frame AN 602 GCOVA2072AJKZ V Antenna Terminal Cover AE VC GA56Z 602 GCOVA2073AJKZ V Antenna Terminal Cover AE VC GH96Z 603 PSLDM4566AJFW V Shield Angle AD 604 XHPSD26P06WS0 V Screw AA 605 XHPSD30P06WS0 V Screw x3 AA 606 ...

Page 69: ...F 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 ...

Page 70: ...rt No Description Code Ref No Part No Description Code 80 VC GA56Z VC GH96Z 6 5 4 3 2 1 A B C D E F G H CASSETTE HOUSING CONTROL PARTS 301 304 311 311 305 306 309 303 312 316 315 307 314 310 317 313 302 308 300 ...

Page 71: ...e Ref No Part No Description Code 81 VC GA56Z VC GH96Z 6 5 4 3 2 1 A B C D E F G H CABINET PARTS B C C B 600 609 609 602 612 605 604 603 607 608 615 614 606 601 605 609 613 615 A VC GH96Z VC GA56Z VC GA56Z VC GH96Z 609 602 A 616 617 ...

Page 72: ...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 surethatthecassettecover open lever is in its right place lower most If it is outofposition pushitdown with a finge...

Page 73: ...nobs RF conv CH preset at 3 channel 12 PACKING OF THE SET Accessories TiNS 3782AJZZ Operation Manual QPLGA0013GEZZ AC Plug Adaptor RRMCG1201AJSA Infrared R C Unit QCNW 8115AJZZ RF Cable SPAKX1073AJZZ Buffer Material Dry Batteies MARK Not Replacement Item SPAKC4377AJZZ VC GA56Z SPAKC4378AJZZ VC GH96Z Packing Case ...

Page 74: ...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 SHARP CORPORATION AV Systems Group Quality Reliability Control Center Yaita Tochigi 329 2193 Japan TQ0901 S Jun 2000 Printed in Japan NA KG ...

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