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VC-A565U
VC-H965U
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified be used.
This Supplement describes corrections of the mechanism in the VC-A565U/H965U Service Manual already
issued. For the items which are not described in this Supplement, refer to the VC-A565U/H965U Service Manual
(S32G5VC-A565U).
2. DISASSEMBLY AND REASSEMBLY ........................................................................................... 2
3. FUNCTION OF MAJOR MECHANICAL PARTS ........................................................................... 4
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS .......................... 6
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE ...................... 25
SHARP CORPORATION
SERVICE MANUAL
SUPPLEMENT
MODELS
OUTLINE
CONTENTS
VC-A565U/H965U ............................ Models for U.S.A/CANADA
1
VIDEO CASSETTE RECORDER
VC-A565U
VC-H965U
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
VC-A565U/H965U
SUPPLEMENT
S62K8VC-A565U
Page
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Summary of Contents for Sharp VC-H965U
- Page 1 S62K8VC-A565U SUPPLEMENT VIDEO CASSETTE RECORDER VC-A565U VC-A565U VC-H965U MODELS VC-H965U In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.
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Page 2: Disassembly And Reassembly
Remove the screw 4 which connecting mechanism and main frame. Take out vertically the mechanism so that it does not damage the adjacent parts. MECHANISM CHASSIS CASSETTE HOUSING VC-A565U VC-H965U MAIN FRAME... - Page 3 If not, strange moving will occur and will couse mecha- nism damage. END SENSOR AE CONNECTOR AH CONNECTOR AA CONNECTOR AD CONNECTOR VC-A565U AC CORD VC-H965U START SENSOR END TIP SW 90° 0° 180° 270° MODE SW This positioning hole should be at front side.
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Page 4: Function Of Major Mechanical Parts
VC-A565U/H965U SUPPLEMENT 3. FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW) Function Function Full erase head Reverse guide lever ass’y Supply pole base ass’y Reel relay gear Tension arm Take-up reel disk Idler wheel ass’y Pinch roller lever ass’y Open guide Drum ass'y Supply reel disk Loading motor block... - Page 5 VC-A565U/H965U SUPPLEMENT FUNCTION OF MAJOR MECHANICAL PARTS (BOTTOM VIEW) Function Function Syncro Gear Clutch lever Master cam Limiter pulley ass’y Capstan D.D. motor Shifter Reel belt...
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Page 6: Adjustment, Replacement And Assembly Of Mechanical Units
VC-A565U/H965U SUPPLEMENT 4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS The explanation given below relates to the on-site general service (field service) but it does not relates to the adjustment and replacement which need high-grade equipment, jigs and skill. For example, the drum assembling, replacement and adjustment service must be performed by the person who have finished the technical courses. - Page 7 VC-A565U/H965U SUPPLEMENT 4-2 MAINTENANCE CHECK ITEMS AND EXECUTION TIME Perform the maintenance with the regular intervals as follows so as to maintain the quality of machine. Maintained 1000 1500 2000 Possible symptom Remarks hrs. hrs. hrs. hrs. encountered Parts Abnormal rotation or significant Guide roller ass’y vibration requires replacement.
- Page 8 VC-A565U/H965U SUPPLEMENT 4-3 REMOVING AND INSTALLING THE CAS- 2. Install in the reverse order of removal. SETTE HOUSING Notes • Removal 1. In the case when you use the magnet screw driver, never 1. In the cassette removing mode, remove the cassette. approach the magnet driver to the A/C head, FE head, 2.
- Page 9 VC-A565U/H965U SUPPLEMENT 4-5 REEL DISK REPLACEMENT AND HEIGHT Notes: CHECK 1. When installing the reel disk, take due care so that the • Removal tension band ass'y is not deformed and grease does no 1. Remove the cassette housing control assembly. adhere.
- Page 10 VC-A565U/H965U SUPPLEMENT Note: Notes: Whenever replacing the reel disk, perform the height check- 1. Hold the torque gauge by hand so that it is not moved. ing and adjustment. 2. Do not keep the reel disk in lock state. Do not allow long- time measurement.
- Page 11 VC-A565U/H965U SUPPLEMENT Notes: 4-9 CHECKING AND ADJUSTMENT OF TAKE- 1. Hold the torque gauge by hand so that it is not moved. UP TORQUE IN VIDEO SEARCH REWIND 2. Do not keep the reel disk in lock state. Do not allow long- MODE time measurement.
- Page 12 VC-A565U/H965U SUPPLEMENT 4-10 CHECKING THE VIDEO SEARCH REWIND BACK TENSION • Remove the cassette housing control assembly. • After short-circuiting between TP803 and TP802 Tension gauge Pinch roller provided at main PWB, plug in the power cord. 900 - 1,200gf •...
- Page 13 VC-A565U/H965U SUPPLEMENT • Checking Tension pole adjustment driver adjusting direction 1. Set a cassette tape, push the REC button to place the unit in the SP record mode. Now check the tension pole position. 2. Visually check to see if the position of the tension pole is +0.5 within the 0 mm from the left side line.
- Page 14 VC-A565U/H965U SUPPLEMENT • Adjustment • Checking the brake torque at the take-up side 1. If the indication of torque cassette meter is lower than the setting, shift the tension spring engagement to the part A. Torque gauge 2. If the indication of torque cassette meter is higher than the setting, shift the tension spring engagement to the part B.
- Page 15 VC-A565U/H965U SUPPLEMENT 4-15 REPLACEMENT OF A/C (AUDIO/CONTROL) 3. Align the left end of gear of A/C head arm with the punched mark of chassis, tentatively tighten the screws HEAD 1 so as to ensure smooth motion of A/C head arm. 1.
- Page 16 VC-A565U/H965U SUPPLEMENT 4-16 A/C HEAD HEIGHT ROUGH ADJUSTMENT 4-17 ADJUSTMENT OF TAPE DRIVE TRAIN 1. Tape run rough adjustment 1 Check and adjust the position of the tension pole. • Setting (See 4-12.) Azimuth screw 2 Check and adjust the video search rewind back tension.
- Page 17 VC-A565U/H965U SUPPLEMENT Notes: 1. Previously set the tracking control in the center position, and adjust the ATR signal waveform to maximum with X value adjustment nut. Thereby the tape run rough ad- justment is facilitated. 2. Especially the outlet side ATR signal waveform must have higher flatness.
- Page 18 VC-A565U/H965U SUPPLEMENT 3 Next, press the tracking button (+), (–) and change the ATR signal waveform from max to min and from PB ATR min to max. At this time adjust the height of supply Signal and take-up side guide roller with the adjustment driver (JiGDRiVERH-4) so that the ATR signal wave- form changes nearly parallel.
- Page 19 VC-A565U/H965U SUPPLEMENT 4-19 REPLACEMENT OF DRUM D.D. MOTOR 4-18 REPLACEMENT OF THE CAPSTAN D.D. 1. Set the ejection mode. (DIRECT DRIVE) MOTOR 2. Withdraw the main power plug from the socket. • Remove the mechanism from the set. • Removal (Perform in numerical order.) •...
- Page 20 VC-A565U/H965U SUPPLEMENT 4-20 REPLACING THE UPPER AND LOWER 4-21 ASSEMBLING OF PHASE MATCHING DRUM ASSEMBLY MECHANISM COMPONENTS • Assemble the phase matching mechanism compo- • Replacement (Perform in the numerical order) nents in the following order. 1 Remove the motor as stated in 4-19 D.D. motor replace- 1.
- Page 21 VC-A565U/H965U SUPPLEMENT 1. Make sure that the loading arm T and S are at the Phase- 4-22 INSTALLING THE SHIFTER Matching point as shown below 2. Fix the shifter position setting part to the roading arm T Drum position setting part as shown in figure 3.
- Page 22 VC-A565U/H965U SUPPLEMENT 4-23 INSTALLING THE MASTER CAM (AT 4-24 REPLACEMENT OF LOADING MOTOR • Removal REAR SIDE OF MECHANISM CHASSIS) 1. Make sure beforehand that the shifter is at initial posi- tion. (Right side from bottom view) 2. Place the master cam in the position as shown below. 3.
- Page 23 VC-A565U/H965U SUPPLEMENT 4-25 ASSEMBLY OF CASSETTE HOUSING 1. Proof lever Proof lever spring and Holder R MSPRD0215AJFJ *Proof lever spring fixing direction designated. Figure 4-41. 2. Open lever, Sensor Plate and Drive Lever to Frame R Outer Outside Inner Bottom Take care not to damage this part...
- Page 24 VC-A565U/H965U SUPPLEMENT 4. Frame R, Frame L, Drive Arm R, Drive Arm L, Upper Plate. LANGF9661AJFW Top surface should be free from scratches or soil. When assemble drive lever to frame R, make sure the hole synchronize.
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Page 25: Mechanism Operation Flowchart And Troubleshooting Guide
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- Page 32 VC-A565U/H965U SUPPLEMENT © COPYRIGHT 2002 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.