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SERVICE MANUAL
COMPACT VHS CAMCORDER
GR-AX770U/AX970U
GR-AX770U/AX970U
General
Format Power source
SPECIFICATIONS (The specifications shown pertain specifically to the model GR-AX770)
Camcorder Connectors
Video : VHS NTSC standard (Using AC Adapter) : DC 11 V DC 6 V (Using battery pack) Audio : 1 V (p-p), 75 Ø unbalanced, analog output (via Video output connector) : 300 mV (rms), 1 kØ analog output (via Audio output connector)
JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP.
Head office East Coast Midwest West Coast Atlanta Hawaii : : : : : :
1700 Valley Road Wayne, New Jersey 07470-9976 10 New Maple Avenue Pine Brook, New Jersey 07058-9641 705 Enterprise Street Aurora, Illinois 60504-8149 5665 Corporate Avenue Cypress, California 90630-0024 1500 Lakes Parkway Lawrenceville, Georgia 30043-5857 2969 Mapunapuna Place Honolulu, Hawaii 96819-2040
(973)317-5000 (973)396-1000 (630)851-7855 (714)229-8011 (770)339-2582 (808)833-5828
JVC CANADA INC.
Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 : 16800 Rte Trans-Canadienne, Kirkland, Quebec H9H 5G7 Montreal Vancouver : 13040 Worster Court Richmond, B.C. V6V 2B3
(416)293-1311 (514)871-1311 (604)270-1311
No. 86663
S40895-04
Power consumption Viewfinder on : 3.7 W Signal system : NTSC-type Video recording system Luminance : FM recording Color : Converted sub-carrier direct recording Conforms to VHS standard Cassette : cassette Tape speed SP : 33.35 mm/sec. (1-5/16 ips) EP : 11.12 mm/sec. (7/16 ips) Recording time (max.) SP : 40 minutes EP : 120 minutes (with TC-40 cassette) Operating temperature : 0°C to 40°C (32°F to 104°F) Operating humidity : 35% to 80% Storage temperature : 20°C to 50°C (4°F to 122°F) Weight : Approx. 850 g (1.9 lbs) Dimensions : 200 mm x 112 mm x 115 mm (W x H x D) (7-7/8" x 4-7/16" x 4-9/16") Pickup : 1/4" format CCD Lens : F1.6, f = 3.9 mm to 62.4 mm, 16:1 power zoom lens with auto iris and macro control, filter diameter 40.5 mm Viewfinder : Electronic viewfinder with 0.5" black/white CRT White balance adjustment : Auto/Manual adjustment
AC Adapter
Power requirement U.S.A. and Canada : AC 120 V`, 60 Hz Other countries : AC 110 V to 240 V`, 50 Hz/60 Hz Output : DC 11 V ,1A
Optional Accessories
· Battery Packs BN-V12U, BN-V20U, BN-V400U · A/V (Audio/Video) Cable · Compact VHS ( ) Cassettes TC-40/30/20 · Active Carrying Bag CB-V7U Some accessories are not available in some areas. Please consult your nearest JVC dealer for details on accessories and their availability.
Specifications shown are for SP mode unless otherwise indicated. E & O.E. Design and specifications subject to change without notice.
Printed in Japan
This service manual is printed on 100% recycled paper. COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No. 86663 January 2002
TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions INSTRUCTIONS 1. DISASSEMBLY 1.1 SERVICE CAUTIONS ............................................................ 1-1 1.1.1 Precautions ...................................................................... 1-1 1.1.2 How to read the disassembly and assembly ................... 1-1 1.1.3 Connection of the wires .................................................. 1-1 1.2 TOOLS REQUIRED FOR ADJUSTMENTS ........................... 1-2 1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS ................ 1-3 1.3.1 Disassembly flow chart ................................................... 1-3 1.3.2 Disassembly method ....................................................... 1-4 1.4 DISASSEMBLY/ASSEMBLY OF CAMERA SECTION AND DECK SECTION .................................................................... 1-8 1.4.1 Flowchart of disassembly ................................................ 1-8 1.4.2 Disassembly method ....................................................... 1-8 1.5 REPLACEMENT OF 3 CCD IMAGE SENSOR ................... 1-10 1.5.1 Removal of CCD image sensor ..................................... 1-10 1.5.2 Installation of new CCD image sensor .......................... 1-10 1.5.3 Replacement of CCD board assembly .......................... 1-10 1.6 TAKE OUT CASSETTE TAPE .............................................. 1-11 1.7 EMERGENCY DISPLAY ...................................................... 1-12 1.8 DEMONSTRATION MODE ................................................. 1-12 1.9 SERVICE NOTE .................................................................. 1-14 2. MECHANISM ADJUSTMENT 2.1 SERVICE CAUTIONS ............................................................ 2-1 2.1.1 Precautions ...................................................................... 2-1 2.1.2 How to read the disassembly and assembly (For Mechanism Parts) .................................................... 2-1 2.1.3 Required adjustment tools .............................................. 2-1 2.2 DISASSEMBLY/ASSEMBLY OF MECHANISM PARTS ........ 2-2 2.3 CHECKUP AND ADJUSTMENT OF MECHANISM PHASE .. 2-6 2.4 TAPE TRANSPORT ADJUSTMENT ...................................... 2-7 2.4.1 Back tension .................................................................... 2-7 2.4.2 Tape pattern ..................................................................... 2-7 2.4.3 A/C head height & azimuth .............................................. 2-8 2.4.4 Phase of control head (X value) ....................................... 2-9 2.5 REMARKS ............................................................................ 2-9 2.5.1 Cleaning ........................................................................... 2-9 2.5.2 Applying oil and grease ................................................... 2-9 2.5.3 Checkup .......................................................................... 2-9 2.6 JIG CONNECTOR CABLE CONNECTION .......................... 2-10 3. ELECTRICAL ADJUSTMENT 3.1 ELECTRICAL ADJUSTMENT ................................................ 3.1.1 Preparation ...................................................................... 3.2 ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT [B/W VF model only] ............................................................... 3.2.1 Tilt .................................................................................... 3.2.2 Centering ......................................................................... 3.2.3 Vertical scanning .............................................................. 3.2.4 Brightness ....................................................................... 3.2.5 Focus ...............................................................................
4. CHARTS AND DIAGRAMS NOTES OF SCHEMATIC DIAGRAM .......................................... 4-1 CIRCUIT BOARD NOTES ........................................................... 4-2 4.1 BOARD INTERCONNECTIONS .......................................... 4-3 4.2 CPU SCHEMATIC DIAGRAM .............................................. 4-5 4.3 M. MDA SCHEMATIC DIAGRAM ......................................... 4-7 4.4 VTR ASP SCHEMATIC DIAGRAM ....................................... 4-9 4.5 DSP SCHEMATIC DIAGRAM ............................................. 4-11 4.6 F/Z/I/MDA SCHEMATIC DIAGRAM .................................... 4-13 4.7 V OUT SCHEMATIC DIAGRAM ......................................... 4-15 4.8 TG/CDS SCHEMATIC DIAGRAM ...................................... 4-17 4.9 REG SCHEMATIC DIAGRAM ............................................ 4-19 4.10 LCD/CVF SCHEMATIC DIAGRAM [GR-AX970U] ........... 4-21 4.11 BW/CVF SCHEMATIC DIAGRAM [GR-AX770UC] .......... 4-23 4.12 BW/CVF SCHEMATIC DIAGRAM [GR-AX970U] ............ 4-25 4.13 JACK SCHEMATIC DIAGRAM ........................................ 4-27 4.14 CCD SCHEMATIC DIAGRAM .......................................... 4-29 4.15 C-VF BL SCHEMATIC DIAGRAM [GR-AX970U] ............. 4-30 4.16 C-VF SHEMATIC DIAGRAM [GR-AX970U] ..................... 4-31 4.17 E.VF SCHEMATIC DIAGRAM [GR-AX770UC] ................ 4-33 4.18 TOP OPE UNIT, ZOOM UNIT, REAR UNIT AND SENSOR SCHEMATIC DIAGRAMS ................................................ 4-35 4.19 MAIN CIRCUIT BOARD ................................................... 4-37 4.20 CCD CIRCUIT BOARD .................................................... 4-43 4.21 E. VF CIRCUIT BOARD [GR-AX770UC] ......................... 4-44 4.22 C-VF CIRCUIT BOARD [GR-AX970U] ............................ 4-45 4.23 WAVEFORMS .................................................................. 4-46 4.24 VOLTAGE CHARTS ......................................................... 4-47 4.25 POWER SYSTEM BLOCK DIAGRAM ............................. 4-51 4.26 CAMERA AND Y/C SYSTEM BLOCK DIAGRAM ........... 4-53 4.27 CPU/MDA SYSTEM BLOCK DIAGRAM .......................... 4-57 5. PARTS LIST 5.1 PACKING AND ACCESSORY ASSEMBLY ................ 5-1 5.2 FINAL ASSEMBLY .................................................... 5-3 5.3 MECHANISM ASSEMBLY ....................................... 5-6 5.4 ELECTRONIC VIEWFINDER ASSEMBLY [GR-AX770UC] ... 5-8 5.4 ELECTRONIC VIEWFINDER ASSEMBLY [GR-AX970U] ..... 5-9 5.5 ELECTRICAL PARTS LIST .................................................. 5-10 MAIN BOARD ASSEMBLY <01> .................................................. 5-10 CCD BOARD ASSEMBLY <02> ......................................... 5-16 C-VF BL BOARD ASSEMBLY <06>[AX970U] .................... 5-16 E.VF BOARD ASSEMBLY <60>[AX770UC] ....................... 5-16
3-1 3-1 3-2 3-2 3-2 3-2 3-2 3-2
The following table lists the differing points between Models GR-AX770U and GR-AX970U in this serise.
GR-AX770U E.VF DC LIGHT B/W NOT USED GR-AX970U COLOR USED
Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
1. Locations requiring special caution are denoted by labels and inscriptions on the cabinet, chassis and certain parts of the product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals. 2. Parts identified by the ! symbol and shaded ( ) parts are critical for safety. Replace only with specified part numbers. Note: Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission. 3. Fuse replacement caution notice. Caution for continued protection against fire hazard. Replace only with same type and rated fuse(s) as specified. 4. Use specified internal wiring. Note especially: 1) Wires covered with PVC tubing 2) Double insulated wires 3) High voltage leads 5. Use specified insulating materials for hazardous live parts. Note especially: 1) Insulation Tape 3) Spacers 5) Barrier 2) PVC tubing 4) Insulation sheets for transistors 6. When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.
· Precautions during Servicing
12. Crimp type wire connector In such cases as when replacing the power transformer in sets where the connections between the power cord and power transformer primary lead wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps. 1) Connector part number : E03830-001 2) Required tool : Connector crimping tool of the proper type which will not damage insulated parts. 3) Replacement procedure (1) Remove the old connector by cutting the wires at a point close to the connector. Important : Do not reuse a connector (discard it).
cut close to connector
Fig.3 (2) Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.
15 mm
Fig.4 (3) Align the lengths of the wires to be connected. Insert the wires fully into the connector. Fig.1 7. Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.) 8. Check that replaced wires do not contact sharp edged or pointed parts. 9. When a power cord has been replaced, check that 10-15 kg of force in any direction will not loosen it.
Metal sleeve
Connector
Fig.5 (4) As shown in Fig.6, use the crimping tool to crimp the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool.
Power cord
1.2 5 2.0 5.5
Crimping tool
Fig.2 10. Also check areas surrounding repaired locations. 11. Products using cathode ray tubes (CRTs) In regard to such products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission. Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts. Under no circumstances attempt to modify these circuits. Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray tube.
Fig.6 (5) Check the four points noted in Fig.7.
Not easily pulled free Crimped at approx. center of metal sleeve
Conductors extended Wire insulation recessed more than 4 mm
Fig.7
I
S40888-01
· Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.
1. Insulation resistance test Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below. 2. Dielectric strength test Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below. 3. Clearance distance When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic parts. See table 1 below.
Fig. 8 4. Leakage current test Confirm specified or lower leakage current between earth ground/power cord plug prongs and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). Measuring Method : (Power ON) Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following table 2.
a
b c
Externally exposed accessible part
Z V
A
Fig. 9 5. Grounding (Class 1 model only) Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.). Measuring Method: Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Fig. 10
Table 1 Specifications for each region
Table 2 Leakage current specifications for each region Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
II
S40888-01
SECTION 1 DISASSEMBLY
1.1 SERVICE CAUTIONS 1.1.1 Precautions 1. Before disassembling/re-assembling the set as well as soldering parts, make sure to disconnect the power cable. 2. When disconnecting/connecting connectors, pay enough attention to wiring not to damage it. 3. In general, chip parts such as resistor, shorting jumpers (0-ohm resistor), ceramic capacitors, diodes, etc. can not be reused after they were once removed. 4. When installing parts, be careful not to do with other parts as well as not to damage others. 5. When removing ICs, be careful not to damage circuit patterns. 6. Tighten screws properly during the procedures. Unless specified otherwise, tighten screws at torque of 0.196 N·m (2.0 kgf·cm). 1.1.2 How to read the disassembly and assembly (For Cabinet Parts)
REMOVAL STEP No. PART CASETTE COVER ASSEMBLY UPPER CASE LOWER CASE ASSEMBLY (Incl. E.VF ASSEMBLY) (2) Fig. No. C1 C2 C3 *UNLOCK/RELEASE/ UNPLUG/UNCLAMP/ UNSOLDER (S1), 3(L1a), (L1b), (L1c), Push button, Spring 2(S2), 2(L2) 9(S3), (L3a), (L3b), CN3a, COVER(JACK)
1.1.3 Connection of the wires Pull both ends of the connector in the arrow direction, remove the lock and disconnect the flat wire.
Wire
Connector
Fig. 1-1-1 Extend the locks in the direction of the arrow for unlocking and then pull out the wire.
Wire
1 2 3
Connector
(1) (3) (4)
(1) Order of steps in Procedure When reassembling, preform the step(s) in the reverse order. These numbers are also used as the identification (location) No. of parts Figures. (2) Part to be removed or installed. (3) Fig. No. showing Procedure or Part Location. C = Cabinet CA = Camera D = Deck (4) Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped or unsoldered. P = Spring W = Washer S = Screw * = Unhook, unlock, release, unplug or unsolder. 2(S3) = 2 Screws (S3) CN = Connector
NOTE: After removing the wire, return the stopper to its original position, because it is apt to come off if it is left open.
Fig. 1-1-2
1-1
1.2 TOOLS REQUIRED FOR ADJUSTMENTS
1
Alignment tape (for SP interchangeability) MHP-C
2
Alignment tape (for N. SP PB Y/C level) MHV-2C
15
Service support system YTU94057-56
16
PC cable QAM0099-002
3
Torque driver YTU94088
4
Bit YTU94088-003
17
Cleaning cloth KSMM-01
5
INF adjustment lens YTU92001B
6
Conn. ring YTU92001-111
Table 1-2-1
7
Gray Scale Chart YTU94133A
8
Color Bar Chart YTU94133C
9
INF lens holder YTU94087
10
Light box Assembly YTU93096A
11
Camera stand YTU93079
12
Extension connector YTU94145B-30
13
Jig connector cable YTU93106A
14
Communication cable YTU93107A
1-2
1,2. Alignment tape To be used for check and adjustment of interchangeability of the mechanism. (Video: Color bar signal, Audio: Non-signal) 3. Torque driver Be sure to use to fastening the mechanism and exterior parts because those parts must strictly be controlled for tightening torque. Bit This bit is slightly longer than those set in conventional torque drivers. INF adjustment lens To be used for adjustment of the camera system. Conn. ring The connector ring to attach the INF. lens to the head of the OP lens. Gray scale chart To be used for adjustment of the camera system. Color bar chart To be used for adjustment of the camera system. INF lens holder To be used together with the camera stand (11) for operating the VideoMovie in the stripped-down condition such as the status without the exterior parts or for using commodities that are not yet conformable to the interchangeable ring.
1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS 1.3.1 Disassembly flow chart This flowchart indicates the disassembly step for the cabinet parts and board assembly in order to gain access to item(s) to be serviced. When reassembling, perform the step(s) in reverse order. Bend, route and dress the flat cables as they were originally.
1
4.
Cassette cover assembly Upper case Lower case assembly (Incl. E.VF assembly) E.VF assembly Top operation unit Rear unit Front cover assembly (Incl. Microphone / Cover(light) ) Microphone Cover(light) Upper Cover(s) assembly Front frame assembly
2 3 4 5 6 7 8 9
5.
6.
7.
8.
9.
10. Light box assembly To be used for adjustment of the camera system. 11. Camera stand To be used together with the INF adjustment lens holder. 12. Extention connector To be used to JIG connector cable 13. JIG connector cable Connected to CN25 of the main board and used for measuring error rates, etc. 14. Communication Cable Connect the Communication cable between the PC cable and Jig connector cable when performing a PC adjustment. 15. Service support system To be used for adjustment with a personal computer. 16. PC cable To be used to connect the VideoMovie and a personal computer with each other when a personal computer isused for adjustment. 17. Cleaning cloth Recommended cleaning cloth to wipe down the video heads, mechanism (tape transport system), optical lens surface.
0 !
Note : For screw management, refer to the table appearing in the section "1.9 SERVICE NOTE" (page 1-14).
1-3
1.3.2 Disassembly method
REMOVAL STEP /LOC No. PART Fig. No. C1 C2 C3 *UNLOCK/RELEASE/ UNPLUG/UNCLAMP/ UNSOLDER (S1), 3(L1a), (L1b), (L1c), Push button, Spring 2(S2), 2(L2) 9(S3), (L3a), (L3b), CN3a, COVER(JACK) 3(S4) 2(S5),(L5a),(L5b),2(L5c), *CN5a 3(S6),(L6a),(L6b),*CN6a 2(S7a),(S7b),(L7a),(L7b), *CN7a
1 2 3 4 5 6 7
8 9 0 !
CASETTE COVER ASSEMBLY UPPER CASE LOWER CASE ASSEMBLY (Incl. E.VF ASSEMBLY) E.VF ASSEMBLY TOP OPERATION UNIT REAR UNIT FRONT COVER ASSEMBLY (Incl. MICROPHONE / COVER (LIGHT) ) MICROPHONE COVER (LIGHT) / DC LIGHT UPPER COVER(S) ASSEMBLY FRONT FRAME ASSEMBLY
(L1c)
C4 C5 C6 C7
(S7a) 2(L7c) C8 C9 2(S8a),(S8b) 2(S9)
(L1b)
Spring (L1a) 1 (S1) 1
List of Abbreviations: 2(S1)=2 screws (S1) 4(L1a)=4 Locking Tabs CN=Connector Reference Notes: Destination of connectors Note : Two kinds of double-arrows in connection tables respectively show kinds of connector/wires. : Flat wire : Wire
Con- No.of nector Pins CN3a CN5a CN6a CN7a 3 20 12 13 2 E.VF (B/W) TOP OPERATION UNIT REAR UNIT MIC Connector MAIN CN12 MAIN CN11
Push button
Fig. C1
C-VF CN7701 / C-VF BL CN7801
MAIN CN18 MAIN CN28
MAIN CN8
(L2)
2
2 (S2)
(1) The FPC assembly should be winded around the hinge assembly by two and half turns so that the wire to be connected to the monitor board assembly is positioned inside. (2) The upper and lower hinge covers should be mounted so carefully the any wire is not caught into either of the covers.
3 (S2)
Fig. C2 1-4
4 (S 3 )
CN 3 a
7 (S 3 ) 5 (S 3 ) (L 3 a) 6 (S 3 ) 8 (S 3 ) COVER (JACK) (L 3 b)
9 (S 3 ) 12 (S 3 )
3
11 (S 3 )
10 (S 3 )
Fig. C3
(L5c)
15 (S 4 )
13 (S 4 ) 14 (S 4 )
16 (S5)
5 17 (S5)
(L5a) (L5b)
4
CN5a
Fig. C4
Fig. C5 1-5
(L6b)
19 (S6) 18 (S6) CN6a 6 (L6a) 20 (S6)
Fig. C6
(L7a) 7
21 (S7a)
For DC LIGHT MODEL ONLY (L7c)
22 (S7a) 24 (S7a)
9 9
(L7c) 23 (S7b)
CN7a
(L7b) 8
Fig. C7 1-6
10
25 (S8a)
27 (S8b) : 0.098N·m (1.0kgf·cm)
Fig. C8
26 (S8a)
28 (S9)
11
29 (S9) : 0.098N·m (1.0kgf·cm)
Fig. C9 1-7
1.4 DISASSEMBLY/ASSEMBLY OF CAMERA SECTION AND DECK SECTION 1.4.1 Flowchart of disassembly The following flowchart shows the disassembly of the camera section and deck section. When assembly of the camera section and deck section, follow this flowchart in the reverse order.
Reference Notes: Destination of connectors Note : Two kinds of double-arrows in connection tables respectively show kinds of connector/wires. : Flat wire : Wire
Con- No.of nector Pins CN1a CN2a CN2b CN2c CN2d 14 14 11 10 2 2 22 14 11 18 MAIN CN13 MAIN CN2 MAIN CN5 MAIN CN1 MAIN CN4 MAIN CN6 MAIN CN15 MAIN CN22 MAIN CN7 MAIN CN3 Connector
1 2 3
Zoom unit assembly
7
ZOOM UNIT SENSOR VIDEO/FLY. E HEAD DRUM MOTOR
LOADING MOTOR DC LIGHT (For DC LIGHT MODEL ONLY)
Main board assembly
7
OP block assembly (Incl. CCD board assembly)
7
3 3
OP block assembly
7
CN2e CN2f CN2g CN2h CN2i
OP BLOCK CCD A/C HEAD CAPSTAN MOTOR
CCD board assembly
For details of disassembly manner, refer to page 1-10, "1.5 REPLACEMENT OF CCD IMAGE SENSOR."
7
4 5
Frame assembly
7
Cassette housing assembly
1.4.2 Disassembly method
REMOVAL STEP /LOC No. PART Fig. No. D1 D2 *UNLOCK/RELEASE/ UNPLUG/UNCLAMP/ UNSOLDER 4(S1),(L1a),*CN1a 2(S2),(L2a) *CN2a,*CN2b,*CN2c,CN2d, CN2e,*CN2f,*CN2g,*CN2h,*CN2j 2(S3),CUSHON (OP)
1 2 3
ZOOM UNIT ASSEMBLY MAIN BOARD
OP BLOCK ASSEMBLY (Incl. CCD BOARD ASSEMBLY) FRAME ASSEMBLY CASSETTE HOUSING ASSEMBLY
D3
(L 1 a) CN 1 a
4 5
D4 D5
2(S4a),2(S4b),(S4c) 4(S5)
1
2 (S 1 ) 1 (S 1 ) 4 (S 1 ) 3 (S 1 )
List of Abbreviations: 2(S1)=2 screws (S1) 4(L1a)=4 Locking Tabs (L1a) CN=Connector
Fig. D1
1-8
SHIELD CASE 10 (MAIN) (S 4 a)
11 (S 4 b)
4
12 (S 4 b)
2
CN 2 j CN 2 h 5 (S 2 ) (L 2 a) CN 2 f CN 2 b CN 2 e CN 2 c CN 2 g
9 (S 4 a)
CN 2 a 6 (S 2 )
CN 2 d
13 (S 4 c)
: 0.108 N·m (1.1 kgf·cm)
Fig. D2 Fig. D4
16
(S 5 ) 5
14
(S 5 )
15 (S 5 )
3
17
(S 5 )
8 (S 3 ) 7 (S 3 )
CUSHION (OP)
: 0.216 N·m (2.2 kgf·cm)
Fig. D3 Fig. D5
1-9
1.5 REPLACEMENT OF 3 CCD IMAGE SENSOR Notes: · Pay the most careful attention to the transparent glass and optical LPF of the CCD image sensor so a not the soil and damage them. If something is soiled with finger-prints, etc., gently clean it with silicon-processed paper/cloth or chamois. · When the CCD image sensor is shipped from the factory, there are protection seals applied onto the transparent glass. Leave the protector as it is, and take it off just before assembling the CCD image sensor to the OP block. 1.5.1 Removal of CCD image sensor 1. Remove two screws (S1a) securing the CCD base assy, and disassemble the CCD spacer, the optical LPF, spacer rubber. 1.5.2 Installation of new CCD image sensor 1. Remove the protection seal from a new CCD image sensor. Next, put the optical LPF, spacer rubber, CCD spacer on the CCD image sensor as they are piled up in this order. At that time, make sure of orientation of each item refering to the following table (see Fig. 1-5-1).
Part Name CCD image sensor Spacer rubber Optical LPF
Orientation Mark is on the right viewed as indicated by the arrow a . IC side is horizontal. Marks are on the left and bottom viewed as indicated by the arrow a.
2. Fix the CCD base assembly to OP block with the two screws (S1a) . At that time, be careful of the orientation. 3. After completion of all P.C. boards to the camera section, observe the monitor to confirm no vignetting caused by the bodytube, rings, lens hood, etc. If no vignetting is observed, it can be said that image's parallel, horizontality and centering are correct. 1.5.3 Replacement of CCD board assembly 1. Remove one screw (S1b). 2. Unsolder at the fourteen points on the CCD board assembly. Notes: · Remove the screw (S1b) only when the CCD board assembly needs replacement. · When installing a new CCD board assembly, carry out the above-mentioned procedure in the reverse order.
a
OPTICAL LPF
1
BLUE CCD SIDE
(S 1 a)
(S 1 b) 2 CCD BOARD (S 1 a) ASSEMBLY
3
OP SIDE
CCD BASE ASSEMBLY CCD SPACER SPACER RUBBER
: 0.147 N·m (1.5 kgf·cm)
Fig. 1-5-1 1-10
1.6 TAKE OUT CASSETTE TAPE In the event that the set enters the emergency mode as it is loaded with a cassette tape and the cassette tape cannot be ejected with the EJECT button, manually, take it out of the set according to the following procedure. Note: · If the mechanism comes into the unloading mode as the cassette tape is not held by hand, it results in tape damage. 1. 2. Disconnect the set from the power source. Remove the cassette cover assembly, Upper case, Lower case assembly, Top operation unit, Front cover assembly (See Fig. C1, C2, C3, C5 and C7, Pages 1-4 to 1-6). Connect a jumper wire to each pole of the loading motor as shown by the magnified view (Fig. 1-6-1) While holding down the cassette housing by hand, connect the jumper wires to a battery to run the mechanism to the EJECT position four unloading. If this unloading operation is performed as the cassette housing is not held down by hand, the front lid of the cassette may damage the tape when it is ejected. 5. For taking in the slack of the tape, run the mechanism to the EJECT position as the front lid of the cassette is left open, and turn the take-up gear in the forward direction to wind up the tape. After confirming that the tape has completely been wound up and the supply reel is idling, take the cassette tape out of the cassette housing.
3. 4.
BATTERY
TOP VIEW
MAGNIFIED VIEW b
TAKE-UP GEAR
Fig. 1-6-1 1-11
1.7 EMERGENCY DISPLAY Whenever some abnormal signal is input to the mechacon CPU, an error number (E01, as an exam-ple) is displayed in the electronic view finder. In every error status, such the message as shown below alternately appear over and over. · In an emergency mode, all operations except turning on/off the POWER switch are ineffectual. Example (in case of the error number E01):
E01 UNIT IN SAFEGUARD MODE
E01 REMOVE AND REATTACH BATTERY
E. VF E07 E06 E04 E03 E02 E01 E00 Short circuit of capstan MDA CAPSTAN FG input absent DRUM FF input absent SUPPLY REEL FG input absent
Symptom
Mode when observed Power ON EDIT DRUM rotation REC, PLAY, SEARCH, FF UNLOADING LOADING REC, PLAY
Mode control motor rotates for more than 10 sec without shift to next mode Mode control motor rotates for more than 10 sec without shift to next mode. Overtime the programming transaction
1.8 DEMONSTRATION MODE This model has the DEMONSTRATION mode. 1) How to set the DEMONSTRATION mode. The camera can be entered into the DEMONSTRA-TION mode by setting on the DISPLAY screen appearing in the viewfinder. When entering the camera into the DEMONSTRATION mode, pay heed to the following matters. No cassette is set in the camcorder or a cassette is set in the camcorder but it is protected from recording. Note: 1) The indications of the DISPLAY page very depending on the setting. 2) How to cancel the DEMONSTRATION mode. To cancel the DEMONSTRATION mode, turn the POWER switch off ("POWER OFF").
1. Set the POWER switch to turn on the "M". Press the MENU WHEEL once. The first page of the DISPLAY appears in the viewfinder.
MENU Wheel
CAME RA ME NU T O S Y S T EM ME NU AU T O F OCU S AU T O E X POS UR E AU T O M . W. B .
M
2. T u r n t h e M E N U W H E E L i n t h e direction of the arrow to set the cursor at "NEXT". Press the MENU WHEEL once. The second page of the DISPLAY appears in the viewfinder.
A
Recording Start/Stop Button
Fig. 1-8-1
1-12
PL
OFF AY
S Y S T EM ME NU T O CAME RA ME NU R E C T I ME OF F I N T . T I ME OF F T E L E MACRO OF F T I T L E L ANG . F R E NCH DA T E / T I ME D EMO MOD E R E T URN OF F
S Y S TEM ME NU NE X T R E C MOD E D . Z OOM SP 50x
See to next page
Display 1
Display 2
Note: 2) As the "DEMO MODE" is executed, the camcoder enters the DEMONSTRATION mode after the title screen of "TITLE CALL" and "FUTURE" appear in this order. 1. TITLE CALL and FUTURE 2. EASY PC CONNECTION 3. CREATE IMAGES & E-MAIL 4. NIGHT-SCOPE OFF 5. NIGHT-SCOPE ON 6. VHS 7. S-VHS (For S-VHS MODEL ONLY) 8. SNAP SHOT 9. PROGRAM AE FOG 10. PROGRAM AE ND EFFECT 11. FADE/WIPE BLACK 12. FADE/WIPE MOSAIC 13. FADE/WIPE SHUTTER 14. FADE/WIPE SLIDE 15. FADE/WIPE DOOR 16. FADE/WIPE CORNER 17. FADE/WIPE WINDOW 18. DIGITAL EFFECT NEGA/POSI 19. DIGITAL EFFECT STRETCH
35. P.STABILIZER ON 34. P.STABILIZER OFF 33. P.STABILIZER ON 32. P.STABILIZER OFF 31. WIDE OFF 30. WIDE ON 29. WIDE OFF 28. DIGITAL EFFECT VIDEO ECHO 27. DIGITAL EFFECT CLASSIC 26. DIGITAL EFFECT STROBE 25. DIGITAL EFFECT SOLARI 24. DIGITAL EFFECT R.FILTER 23. DIGITAL EFFECT B.FILTER 22. DIGITAL EFFECT B/W 21. DIGITAL EFFECT SEPIA 20. DIGITAL EFFECT MOSAIC Fig. 1-8-2
The camcorder automatically enters the DEMONSTRATION mode and it repeats demonstration operation. While the camcorder is performing demonstration, all operations except turning on/off the POWER switch are ineffectual.
S Y S T EM ME NU T O CAME RA ME NU R E C T I ME OF F I N T . T I ME OF F T E L E MACRO OF F T I T L E L ANG . F R ENCH DA T E / T I ME 06 J L I P I D NO . ON D EMO MOD E S E AM V I D EO OU T R E T URN
3. Turn the MENU WHEEL in the direction of the arrow to set the cursor at "DEMO MODE". Then, press the MENU WHEEL once. The third page of the DEMO MODE appears in the viewfinder.
4. Turn the MENU WHEEL in the direction of the arrow to set the cursor at "ON". Then, press the MENU WHEEL once. The fourth page of the DISPLAY appears in the viewfinder. ("DEMO MODE" is switched "ON" from "OFF" status.) 5. Press the MENU WHEEL once.
DENO MODE OFF ON
EXIT
Display 3
Display 4
Refer to Fig. 1-8-2.
While the DEMONSTRATION mode is activated, a word of DEMONSTRATION is appearing on the screen scrolling from right to left.
1-13
1-14
MAIN ASSEMBLY
1 2 4
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Fig. C7 Fig. C6 Fig. C5 Fig. C4 I 24
3 5 6 7 (8 , 9 )
3 4 5 6 7 8 Fig. C3
1.9 SERVICE NOTE
2 Fig. C2
1
Symbol No. Removing order of screw Place to stick screw Reference drawing Screw tightening torque
Fig. C1
0
26 27 28 29 Fig. C9 II
-
25
Symbol No. Removing order of screw Place to stick screw Reference drawing Screw tightening torque
Fig. C8
DECK ASSEMBLY
1 2 3 4 5
12 13 14 15 16 Fig. D5 I VIII 17 8 9 10 11 Fig. D4 IV 6 7 Fig. D3 I 4 5 Fig. D2 I 2 3 Fig. D1
Symbol No. Removing order of screw Place to stick screw Reference drawing Screw tightening torque
1
OP B LOCK ASSEMBLY
3
2 3
1
Symbol No. Removing order of screw Place to stick screw Reference drawing Screw tightening torque V
Fig. 1-5-1
I
< NOTE > 1) 2) I IV VII : : Don't reuse the screw, because screw lock bond was applied to them. Pay careful attention to tightening torque for each screw. : 0.196N·m (2.0kgf·cm) : 0.108N·m (1.1kgf·cm) : 0.078N·m (0.8kgf·cm) II : 0.098N·m (1.0kgf·cm) V : 0.147N·m (1.5kgf·cm) VIII : 0.216N·m (2.2kgf·cm) III : 0.118N·m (1.2kgf·cm) VI : 0.049N·m (0.5kgf·cm)
Table 1-9-1
SECTION 2 MECHANISM ADJUSTMENT
2.1 SERVICE CAUTIONS 2.1.1 Precautions 1. Before disassembling/re-assembling the set as well as soldering parts, make sure to disconnect the power cable. 2. When disconnecting/connecting connectors, pay enough attention to wiring not to damage it. 3. When installing parts, be careful not to do with other parts as well as not to damage others. (Pay the most careful attention to the upper drum assembly and tape transport mechanism.) 1
Alignment tape MHP-C
2.1.3 Required adjustment tools 2
Alignment tape MHP-LC
3
Jig connector cable YTU93106A
4
Extension connector YTU94145B-30
2.1.2 How to read the disassembly and assembly (For Mechanism Parts) (1) Order of steps in Procedure When reassembling, perform the step(s) in the reverse order. These numbers are also used as the identification (location) No. of parts Figures. (2) Part to be removed or installed. (3) Location of part. T = Top B = Bottom (4) Fig. No. showing Procedure or Part Location. M = Mechanism (5) Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped or unsoldered. P = Spring W = Washer S = Screw * = Unhook, unlock, release, unplug or unsolder. (6) Adjustment information for installation. (+) = Refer to Exploded Views for Lubrication information.
5 Cassette torque meter PUJ50431-2
6
Roller Driver PTU94002-2
Table 2-1-1 1,2. Alignment tape To be used for check and adjustment of interchangeability of the mechanism. (Video: Color bar signal, Audio: Non-signal) 3. JIG connector cable Connected to CN25 of the main board and used for measuring error rates, etc. 4. Extention connector To be used to JIG connector cable 5. Cassette Torque Meter This is used to check the back tension and play torque during mechanism adjustment. 6. Roller Driver To be used to turn the roller driver to adjustment of the linearity of playback envelope.
(For Mechanism Parts) STEP/LOC. No. Fig. No.
T T T M1 M1 M1
PART
REMOVAL *UNHOOK/UNLOCK /RELEASE/UNPLUG /UNSOLDER
(S1) (P1), (W1a) (W1a), (W1b)
INSTALLATION ADJUSTMENT CONDITION NOTE
_
1 2 3
(1)
ROLLER BASE ASSEMBLY TENSION ARM ASSEMBLY REEL DISC (SUP)
(2)
(3)
(4)
(5)
(6)
2-1
2.2 DISASSEMBLY/ASSEMBLY OF MECHANISM PARTS This procedure starts with the condition that the cabinet parts and deck parts. Also, all the following procedures for adjustment and parts replacement should be performed in STOP mode. When reassembling, perform the step(s) in the reverse order.
Fig. No.
T T T T T T T T T B M1 M1 M1 M1 M2 M2 M2 M2 M2 M3
STEP/LOC. No.
PART
REMOVAL *UNHOOK/UNLOCK /RELEASE/UNPLUG /UNSOLDER
(S1) (P1), (W1a) (W1a), (W1b) (W1a) (W2) (W2) (S2) (W2) (W2) 4(S3a)
INSTALLATION ADJUSTMENT CONDITION NOTE
See, Adjustment procedure for Section 2.3 The function of this part varies according to the assembly (VHS/S-VHS) which this part is rporated in.
1 2 3 4 5 6 7 8 9 0 ! @ # $ % ^ & * ( ) q w e r t y u i o p Q W E R T Y U
ROLLER BASE ASSEMBLY TENSION ARM ASSEMBLY REEL DISC (SUP) SLANT ARM ASSEMBLY CANCEL LEVER ASSEMBLY EJECT LEVER ASSEMBLY CASSETTE GUIDE (L) ASSEMBLY SUPPLY CLUTCH ASSEMBLY WHEEL GEAR ROTARY ENCODER
TIMING BELT CENTER PULLEY UNIT CASSETTE GUIDE (R) ASSEMBLY TU GEAR BRAKE SUB GEAR P.R ARM ASSEMBLY TU GUIDE ARM ASSEMBLY LINK ARM ASSEMBLY LED GUIDE A/C HEAD UNIT SLANT POLE BASE ASSEMBLY CAP MOTOR ASSEMBLY MOTOR BASE BRUSH DRUM FINAL GUIDE RAIL POLE BASE (SUP) POLE BASE (TU) COVER PLATE DRIVE LEVER ASSEMBLY MOTOR BRACKET ASSEMBLY CONTROL CAM LINK LEVER MIDDLE GEAR LOADING GEAR(T) ASSEMBLY LOADING GEAR(S) ASSEMBLY LOADING RING ASSEMBLY
B T/B T T T T T T T T T T T B T/B T T T T T T T T T T T T
M3 M3 M3 M3 M3 M3 M3 M4 M4 M4 M5 M5 M5 M6 M6 M6 M6 M6 M7 M7 M7 M8 M8 M8 M8 M8 M8 (W8b) (W8b) 4(S8) 3(S7) (W8a) 2(S3a) (S3b), (P3) (W3a) (W3a) (W3b) (W3a) (W4) (S4a) 2(S4b) (S5a) 3(S5a)
(Only use S-VHS model) See, Adjustment procedure for Section 2.3
2(S5b), (S5c) (S6a) 2(S6b), 2(S6c) *CATCHER 8(S6d)
See, Adjustment procedure for Section 2.3 See, Adjustment procedure for Section 2.3
Table 2-2-1
2-2
25 31 37 1 29 28 27 4 36 2 5 9 3 34 7 35 30 8 6
26
20 21 19 22 23 17 16 14 15 18 12 32 33 13
Fig. 2-2-1 TOP VIEW
24
11
10
Note: When reinstalling the cassette housing to the set, pay careful attention to the switch not to damage it.
Fig. 2-2-2 BOTTOM VIEW
2-3
(W1a)
2
(S3b) (P3)
(S3a)
16
(W3b)
13 12
17
(W3a)
(S1)
(P1) (W1a)
(W3a)
1 3 4
14
(W3a)
15
(W1a) (W1b)
11
(S3a) (S3a) (S3a) (S3a)
10
Fig. M1
Fig. M3
(W2)
6 5
(S4a)
19 20
(W2)
8
(W4)
(S4b)
(S4b)
(S2) (W2)
9
18
7
Fig. M2
Fig. M4
2-4
(S5a) (S5a)
21
31
(S5a)
(S7)
22
(S5b)
(S5c)
29
30
23
Fig. M5
(S6b)
Fig. M7
Catcher
25
(S8)
(S8)
28 27
(S6d) (S6d) (S6d)
37
(W8a)
32
(S6d)
36
(W8b) (W8b)
35 26
33
34
(S6c)
24
(S6c) (S6a)
Fig. M6
Fig. M8
2-5
2.3 CHECKUP AND ADJUSTMENT OF MECHANISM PHASE Note: Pay careful attention to the installing order and phase of mechanism parts of the loading system.
Align the two holes of the Loading ring assembly to those of the deck.
Align the hole of the Loading gear (T) assembly to that of the deck.
Align the hole of the link lever assembly to the deck hole.
Align one of the three holes of wheel gear to the deck hole.
Align each one link lever assembly hole and deck hole to the hole at the control cam position.
Fig. 2-3-1 Top of main deck
Align this part to each "Triangle" mark.
Align this part to each "Triangle" mark.
Fig. 2-3-2 Rotary encoder 2-6
2.4 TAPE TRANSPORT ADJUSTMENT In most cases the deck section is in need electrical adjustment, it results from replacement of worm mechanical parts or video heads. In the event of malfunction with electrical circuits, troubleshouting with the aid of proper test instruments most be done first, and then commence necessary repair, replacement and adjustment, etc. 2.4.1 Back tension 1. Set a cassette torque meter onto the deck and measure the back tension in standard REC mode to confirm that the back tension is 0.7x10-3 1.37x10-3 N·m. 2. If not, replace the tension band. When the value widely fluctuates in the measurement, replace the supply reel disk. 3. With the cassette torque meter, confirm that the play torque is 1.47x10-3 2.45x10-3 N·m. If necessary, replace the center pulley unit.
Back tension 0.7x10-3 - 1.37x10-3 N·m (7-14gf·cm)
8. When the FM waveform breaks in the level varying process, subtly adjust the height of guide rollers at every breaking point so that the waveform varies as flat as possible. Repeat the above steps 6. and 7. several times to confirm that the waveform is flat as a whole. 9. Playback the SP stairstep signal of alighment tape and adjust the tracking control to maximize the FM waveform, confirm that FM waveform variation is always flat. 10. Record the signal and play it back in both of the SP and EP modes, and confirm that the FM waveform is flat in both modes. Note: Among the above-mentioned adjustment steps, the items of No.9 and No.10 are needed for the EP model only.
CH-2 1 field
Play torque 1.47x10-3 - 2.45x10-3 N·m (15-25gf·cm)
Causer by wrong height of supply guide roller
Flatten waveform.
Caused by wrong height of take-up guide roller
Fig. 2-4-2 FM waveform-1
Fig. 2-4-1 Cassette torque meter 2.4.2 Tape pattern 1. Remove the Cover (JIG) shwon on Fig. 2-6-1 (Page 210). 2. Connect the jig connector cable to CN25 on the MAIN board as shwon on Fig. 2-6-1 (Page 2-10). 3. Observe signal at V. TP FM with external trigger from V. FF on the jig connector cable. 4. Playback the SP stairstep signal of the alignment tape and maximize the FM waveform by the tracking button. 5. Set the tracking control to the center position by simultaneously pressing the tracking (-) and (+) buttons and maximize the FM waveform by the tracking button. 6. If the observed FM waveform is not flat, adjust the height of the supply of take-up guide roller with the roller driver. Note: To prevent the tape from damage, turn the guide rollers slowly. 7. By operating the tracking button (both in + and directions) in the manual tracking mode, vary the output level of the FM waveform from maximum to minimum and vice versa to confirm that the waveform varies nearly in a flat shape.
Correct variation of waveform
Bad variation of waveform
Fig. 2-4-3 FM waveform-2 (U)
2-7
11. Through the above steps, confirm that there occur no wrinkling and damage in the tape around the pinch roller and TU guide pole whenever the deck is in operation of Loading/Unloading, Search Rewind and at mode change from Search Rewind to play mode. If wrinkling or damage in the tape occurs around the TU guide pole, adjust the angle (slant) of the A/C head to the tape. So that the tape normally runs along the lower flange of the guide pole.
2.4.3 A/C head height & azimuth 1. Connect the jig connector cable to CN25 on the MAIN board. 2. Connect the channel-1 scope probe to the audio output and connect the channel-2 scope probe to PB CTL. 3. Playback the alignment tape. 4. Set the tracking to its center range by pressing the (+) and () tracking controls simultaneously. 5. Adjust screws A , B and C approximately 45 degrees in the same direction to obtain maximum audio output and CTL signal levels. 6. As a final fine adjustment, adjust screw B for minimum signal level fluctuation and screw C for maximum output signal level.
Pole base (SUP) (Guide roller)
Pole base (TU) (Guide roller) TU guide pole
A/C head
Tension pole Pinch roller
Screw C
Screw A Screw B
Fig. 2-4-5 A/C head
Fig. 2-4-4 Tape transport system
Audio signal
Control pulse signal
Fig. 2-4-6 Audio and CTL signal
2-8
2.4.4 Phase of control head (X value) 1. Connect the jig connector cable to CN25 on the MAIN board. 2. Playback the SP stairstep signal of the alignment tape and observe signal at V.TP FM with external trigger from V.FF on the jig connector cable. 3. Operate the tracking button in the center and manual tracking mode by pressing the tracking (+) and () buttons and confirm that the FM output level is maximum at the center position as shown in Fig. 2-4-8. 4. If necessary, slightly loosen the setscrews D and E and insert the Tweezers into the notch and guide hole to move the A/C head fully in the direction of the capstan to the extent. 5. Gradually move the A/C head toward the drum to find the position where the FM output level maximum for the first time (a b in Fig. 2-4-8). 6. Fine adjust the phase of the A/C head and tighten the screws D and E at the point a.
2.5 REMARKS 2.5.1 Cleaning 1. For cleaning of the upper drum (particularly video heads), use fine-woven cotton cloth or Kimwipe with alcohol soaks through. Do not move the cloth but turn the upper drum counterclockwise. Note: Make sure not to move the cloth in the vertical direction to the video head, since it may cause damage of the video heads. 2. For cleaning of parts of the tape transport system except the upper drum, use fine-woven cotton cloth or cotton swab soaked alcohol. 3. After cleaning, confirm that the cleaned parts are completely dry before loading the deck with cassette tape.
2.5.2 Applying oil and grease 1. Periodical oiling and greasing are not required but should be done to new parts when replacing. If oil and grease on the other parts of the other party are old and dirty, wipe them clean and apply new oil or grease. 2. For parts and points to apply oil and grease, refer to the exploded view of the mechanism assembly (M3). Table 2-5-1 specifies oil and grease to be used. 3. When oiling, clean the objective parts with alcohol first and apply one or two drop(s) of oil. Too much oiling causes rotary parts to slip because of oil leakage.
Classification Name Symbol in drawing
A/C head
Insert the Tweezers
Screw D
Screw E
Grease Oil
KYODO-SH-P YTU94027
AA BB
Fig. 2-4-7 Phase of control head Table 2-5-1 Specific oil and grease to be used
a Adjusting point
b
2.5.3 Checkup
Max
After replacement of the supply reel disk and tension band, make sure to inspect back tension according to the adjustment procedure of MECHANISM ADJUSTMENT section.
FM output
Zero Direction of capstan A/C head phase Direction of drum
Fig. 2-4-8 Phase adjustment point of control head
2-9
2.6 JIG CONNECTOR CABLE CONNECTION Remove the cover (JIG).
Jig connector cable
CN25
Extention connector
Cover(JIG)
NOTE: For supplying the power through the coupler by removing the cover (for jig), use this extension connector double for connecting the jig connector cable.
JIG CONNECTOR
to 10 pin ( RXD ) to 28 pin ( TXD ) to 4/5/6/8 pin ( GND )
COMMUNICATION CABLE
RED WHITE BLACK
Fig. 2-6-1 Jig connector cable connection
MAIN BOARD CN25
DIAL_MN CVF_B BWVFADJ CVF_G VF_RPD CVF_R GND PLI_AD GND NC GND VPP_7.8V JIGCN_SW DISCHG_L GND MCU_RST TCCS_TXD V_FF RXD V_TP_FM V_OUT V_OVL AO_SIG_J PB_CTL AL_3.2V TXD EJECT_SW NC NC NC 1 16 2 17 3 18 4 19 5 20 6 21 7 22 8 23 9 24 10 25 11 26 12 27 13 28 14 29 15 30
Jig BOARD
1 16 2 17 3 18 4 19 5 20 6 21 7 22 8 23 9 24 10 25 11 26 12 27 13 28 14 29 15 30 DIAL_MN CVF_B BWVFADJ CVF_G VF_RPD CVF_R GND PLI_AD GND NC GND VPP_7.8V JIGCN_SW DISCHG_L GND MCU_RST TCCS_TXD V_FF RXD V_TP_FM V_OUT V_OVL AO_SIG_J PB_CTL AL_3.2V TXD EJECT_SW NC NC NC
Fig. 2-6-2 Jig connector cable schematic diagram 2-10
SECTION 3 ELECTRICAL ADJUSTMENT
3.1 ELECTRICAL ADJUSTMENT 3.1.1 Preparation 1. Precaution This model does not contain adjustment controls (VR). General deck system, camera system and monitor system adjustment are not required. However, if MAIN board and MONITOR board need replacement, please use original E 2 PROM onto new board. Then adjustment are not required. And if parts such as the following need replacement, special computerized adjustment are required (Refer to "5. Connection for Service support system".). Please contact to JVC Service for detaile information. · OP block · EEP ROM (IC102 of MAIN board) · MONITOR In the event of malfunction with electrical circuits, troubleshooting with the aid of proper test instruments most be done first, and then commence necessary repair, replace-ment and adjustment, etc. 1. In case of wiring to chip test points for measurement, use IC clips, etc. to avoid any stress. 2. Since connectors are fragile, carefully handle them in disconnecting and connecting. 3. Shortcircuit between operation un it and DECK chassis. 2. Required test equipment 1. Color TV monitor. 2. AC power adapter 3. Oscilloscope (dual-trace type, observable 100 MHz or higher frequency) * It is recommended to use one observable 300 MHz or higher frequency. 4. Digital voltmeter 5. Frequency counter (with threshold level adjuster) 6. Personal computer 3. Required adjustment tools For detsails of special jigs necessary for adjustment, refer to page 1-2 and 1-3 of the Section 1. 4. Setup for E. VF section adjustment [B/W VF model only] Referring to "SEC. 1 DISASSEMBLY" and connect the E. VF WIRE to CN12 of the MAIN board.
(LY20701)
Bottom case assy Serial No. label
Screw Parts No. LY20701 Adjustment ltem : 3.2
Note: · This adjustmentalls into a special adjustment that requires a personal computer. For details, refer to "3.1.1 Preparation".
5. Connection for Service support system
Jig connector cable
Service Support System
CN25 Cover(JIG) Extention connector
NOTE: For supplying the power through the coupler by removing the cover (for jig), use this extension connector double for connecting the jig connector cable.
JIG CONNECTOR
to 10 pin ( RXD ) to 28 pin ( TXD ) to 4/5/6/8 pin ( GND )
RS232C COM Port MENU
COMMUNICATION CABLE
RED
PC CABLE
WHITE BLACK
Personal Computer
Fig. 3-1-1 Connection for Service support system 3-1
3.2 ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT [B/W VF model only] Notes: · Unless otherwise specified, all measurement points and adjustment parts are located on E. VF board. · After adjustment or replacement of the deflection yoke or the centering magnet, fix it by the band as shown the figure below.
TOP VIEW CRT CENTERING MAGNET
1) 2) 3)
Put the deflection yoke to the most inner side of CRT neck first. Then fix the stopper temporary. Adjust the tilt of picture on the E. VF screen by tilting the deflection yoke. Fix the stopper completely.
3.2.2 Centering Subject Mode · Alignment tape · Stairstep · PB · E. VF · E. VF screen · Centering magnet (CRT assy) · The center of the E. VF screen
STOPPER
Equipment Measurement point Adjusting part Specification
1) While observing the viewfinder screen, adjust the centering magnet to locate the stairstep in the center of the view-finder screen. Fig. 3-2-1 E. VF · After adjustment is completed, compare the picture on the E. VF screen with the monitor TV.
CENTERING MAGNET
3.2.3 Vertical scanning Subject Mode Equipment Measurement point Adjusting part Specification · Camera picture · EE · E. VF · E. VF screen · VR7001 (V. SIZE) · Normal picture amplitude
CRT
STOPPER
F.B.T
1) Observing the viewfinder screen, adjust VR7001 for normal picture amplitude. 3.2.4 Brightness
Fig. 3-2-2 E. VF
Subject Mode
· · EE · Lens closed · E. VF · E. VF screen · VR7002 (BRIGHT) · The CRT raster is just barely visible
CN7002
VR7003 FOCUS T7001
Equipment Measurement point Adjusting part Specification
60 E. VF PWB ASSY
VR7001 V. SIZE CN7001 VR7002 BRIGHT
1) Close the lens with the cap and adjust VR7002 so that the raster of the CRT is just visible in the E. VF. 3.2.5 Focus
Fig. 3-2-3 E. VF board 3.2.1 Tilt Subject Mode Equipment Measurement point Adjusting part Specification · Alignment tape · Stairstep · PB · E. VF · E. VF screen · Deflection yoke · The picture is visible as same as monitor TV.
Subject Mode Equipment Measurement point Adjusting part Specification
· Camera picture · EE · E. VF · E. VF screen · VR7003 (FOCUS) · The center area is clear and defined
1) While observing the viewfinder screen, adjust VR7003 so that the picture at the central area of the screen is clear and defined.
3-2