JVC GR-AX770U User manual

SERVICE MANUAL
No. 86663
January 2002
SPECIFICATIONS (The specifications shown pertain specifically to the model GR-AX770)
COMPACT VHS CAMCORDER
Printed in Japan This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
GR-AX770U/AX970U
No. 86663
GR-AX770U/AX970U
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
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
JVC CANADA INC.
Head office
Montreal
Vancouver
:
:
:
21 Finchdene Square Scarborough, Ontario M1X 1A7
16800 Rte Trans-Canadienne, Kirkland, Quebec H9H 5G7
13040 Worster Court Richmond, B.C. V6V 2B3
[phone]
[phone]
[phone]
S40895-04
Camcorder
General
Format : VHS NTSC standard
Power source : DC 11 V (Using AC Adapter)
DC 6 V (Using battery pack)
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
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.
Connectors
Video : 1 V (p-p), 75 Øunbalanced, analog output (via
Video output connector)
Audio : 300 mV (rms), 1 kØanalog output
(via Audio output connector)
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 , 1 A
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

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 <M1> ................ 5-1
5.2 FINAL ASSEMBLY <M2> .................................................... 5-3
5.3 MECHANISM ASSEMBLY <M3> ....................................... 5-6
5.4
ELECTRONIC VIEWFINDER ASSEMBLY <M4> [GR-AX770UC] ... 5-8
5.4 ELECTRONIC VIEWFINDER ASSEMBLY <M4> [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
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 3CCD 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
3.1.1 Preparation ...................................................................... 3-1
3.2 ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT
[B/W VF model only] ............................................................... 3-2
3.2.1 Tilt .................................................................................... 3-2
3.2.2 Centering ......................................................................... 3-2
3.2.3 Vertical scanning .............................................................. 3-2
3.2.4 Brightness ....................................................................... 3-2
3.2.5 Focus ............................................................................... 3-2
TABLE OF CONTENTS
Section Title Page Section Title Page
GR-AX770U GR-AX970U
E.VF B/W COLOR
DC LIGHT NOT USED USED
The following table lists the differing points between Models GR-AX770U and GR-AX970U in this serise.

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.
Fig.1
1. Locations requiring special caution are denoted by labels and in-
scriptions 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 serv-
ice 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 com-
ply 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.
Power cord
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 compli-
ance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
ode 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.
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 trans-
former primary lead wires are performed using crimp type connec-
tors, 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).
Fig.7
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.
Connector
Metal sleeve
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.
I
•Precautions during Servicing
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.
1.25
2.0
5.5
Crimping tool
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
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 exter-
nally 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 acces-
sible 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’) be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
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.
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
Fig. 9
Fig. 8
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
ab
c
V
A
Externally
exposed
accessible part
Z

1-1
(1) (2) (3) (4)
SECTION 1
DISASSEMBLY
1.1.3 Connection of the wires
Pull both ends of the connector in the arrow direction, re-
move the lock and disconnect the flat wire.
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 ca-
ble.
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 pat-
terns.
6. Tighten screws properly during the procedures. Un-
less 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)
(1) Order of steps in Procedure
When reassembling, preform the step(s) in the reverse
order. These numbers are also used as the identifica-
tion (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, un-
locked, released, unplugged, unclamped or unsoldered.
P = Spring
W = Washer
S = Screw
* = Unhook, unlock, release, unplug or unsolder.
2(S3) = 2 Screws (S3)
CN = Connector
Fig. 1-1-1
Fig. 1-1-2
1CASETTE COVER C1 (S1), 3(L1a), (L1b), (L1c),
ASSEMBLY Push button, Spring
2UPPER CASE C2 2(S2), 2(L2)
3LOWER CASE C3 9(S3), (L3a), (L3b), CN3a,
ASSEMBLY COVER(JACK)
(Incl. E.VF ASSEMBLY)
STEP
No. PART Fig.
No.
REMOVAL
*UNLOCK/RELEASE/
UNPLUG/UNCLAMP/
UNSOLDER
Connector
Wire
Connector
Wire
NOTE: After removing the wire, return the stopper to
its original position, because it is apt to come
off if it is left open.
Extend the locks in the direction of the arrow for unlocking
and then pull out the wire.

1-2
12
INF adjustment lens
YTU92001B
Torque driver
YTU94088
34Bit
YTU94088-003
56
Alignment tape
(for SP interchangeability)
MHP-C
Alignment tape
(for N. SP PB Y/C level)
MHV-2C
INF lens holder
YTU94087
78
910
11 12
13 14
Camera stand
YTU93079
Conn. ring
YTU92001-111
Gray Scale Chart
YTU94133A
Color Bar Chart
YTU94133C
Light box Assembly
YTU93096A
Extension connector
YTU94145B-30
Service support system
YTU94057-56
Cleaning cloth
KSMM-01
1615
17
PC cable
QAM0099-002
Jig connector cable
YTU93106A
Communication cable
YTU93107A
1.2 TOOLS REQUIRED FOR ADJUSTMENTS
Table 1-2-1

1-3
1,2. Alignment tape
To be used for check and adjustment of interchange-
ability of the mechanism.
(Video: Color bar signal, Audio: Non-signal)
3. Torque driver
Be sure to use to fastening the mechanism and exte-
rior parts because those parts must strictly be control-
led for tightening torque.
4. Bit
This bit is slightly longer than those set in conventional
torque drivers.
5. INF adjustment lens
To be used for adjustment of the camera system.
6. Conn. ring
The connector ring to attach the INF. lens to the head
of the OP lens.
7. Gray scale chart
To be used for adjustment of the camera system.
8. Color bar chart
To be used for adjustment of the camera system.
9. INF lens holder
To be used together with the camera stand (11) for op-
erating the VideoMovie in the stripped-down condition
such as the status without the exterior parts or for us-
ing commodities that are not yet conformable to the in-
terchangeable ring.
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 ca-
ble and Jig connector cable when performing a PC ad-
justment.
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.
1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS
1.3.1 Disassembly flow chart
This flowchart indicates the disassembly step for the cabi-
net 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 ca-
bles as they were originally.
Note :
For screw management, refer to the table appearing
in the section “1.9 SERVICE NOTE” (page 1-14).
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
1
2
3
4
5
6
7
8
9
0
!

1-4
1.3.2 Disassembly method
1CASETTE COVER C1 (S1), 3(L1a), (L1b), (L1c),
ASSEMBLY Push button, Spring
2UPPER CASE C2 2(S2), 2(L2)
3LOWER CASE C3 9(S3), (L3a), (L3b), CN3a,
ASSEMBLY COVER(JACK)
(Incl. E.VF ASSEMBLY)
4E.VF ASSEMBLY C4 3(S4)
5TOP OPERATION C5 2(S5),(L5a),(L5b),2(L5c),
UNIT *CN5a
6REAR UNIT C6 3(S6),(L6a),(L6b),*CN6a
7FRONT COVER C7 2(S7a),(S7b),(L7a),(L7b),
ASSEMBLY *CN7a
(Incl. MICROPHONE /
COVER (LIGHT) )
8MICROPHONE (S7a)
9COVER (LIGHT) / 2(L7c)
DC LIGHT
0UPPER COVER(S) C8 2(S8a),(S8b)
ASSEMBLY
!FRONT FRAME C9 2(S9)
ASSEMBLY
STEP
/LOC
No. PART Fig.
No.
REMOVAL
*UNLOCK/RELEASE/
UNPLUG/UNCLAMP/
UNSOLDER
List of Abbreviations:
2(S1)=2 screws (S1)
4(L1a)=4 Locking Tabs
CN=Connector
Reference Notes:
<NOTE 1>
Destination of connectors
Note :
Two kinds of double-arrows in connection tables
respectively show kinds of connector/wires.
⇔: Flat wire
←→ : Wire
Con-
nector Connector
CN3a3 E.VF (B/W) ←→ MAIN CN12
20 C-VF CN7701 / C-VF BL CN7801 ⇔MAIN CN11
CN5a 12 TOP OPERATION UNIT ⇔MAIN CN18
CN6a 13 REAR UNIT ⇔MAIN CN28
CN7a 2 MIC ←→ MAIN CN8
No.of
Pins
<NOTE 2, 3>
(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 posi-
tioned inside.
(2) The upper and lower hinge covers should be mounted
so carefully the any wire is not caught into either of the
covers.
Fig. C1
Fig. C2
1
(S1)
(L1c)
1
(L1b)
Spring
(L1a)
Push button
(L2)2
2
(S2)
3
(S2)

1-5
Fig. C4
Fig. C3
Fig. C5
3
COVER
(JACK)
(S )
3
4
(S )
3
5
(S )
3
6
(S )
3
7
(S )
3
8
(S )
3
9
(S )
3
10
(S )
3
11
(S )
3
12
(L a)
3
(L b)
3
CN a
3
4
(S )
4
13
(S )
4
14
(S )
4
15
5
17
(S5)
16
(S5)
(L5c)
(L5a)
(L5b)
CN5a

1-6
Fig. C7
Fig. C6
20
(S6)
(L6a)
CN6a
(L6b)
18
(S6)
6
19
(S6)
(L7a)
7
(L7b)
8
21
(S7a)
22
(S7a)
24
(S7a)
CN7a
23
(S7b)
9
9(L7c)
(L7c)
For DC LIGHT
MODEL ONLY

1-7
Fig. C9
Fig. C8
10
25
(S8a)
26
(S8a)
27
(S8b)
: 0.098N·m (1.0kgf·cm)
: 0.098N·m (1.0kgf·cm)
29
(S9)
28
(S9)
11

1-8
1.4 DISASSEMBLY/ASSEMBLY OF CAMERA SECTION
AND DECK SECTION
1.4.1 Flowchart of disassembly
The following flowchart shows the disassembly of the cam-
era section and deck section. When assembly of the cam-
era section and deck section, follow this flowchart in the re-
verse order.
<Camera section/Deck section>
For details of disassembly
manner, refer to page 1-10,
“1.5 REPLACEMENT OF
CCD IMAGE SENSOR.”
4Frame assembly
5Cassette housing assembly
1 Zoom unit assembly
2Main board assembly
3OP block assembly
(Incl. CCD board assembly)
3OP block assembly
3 CCD board assembly
7
7
7
7
7
7
1.4.2 Disassembly method
1ZOOM UNIT D1 4(S1),(L1a),*CN1a
ASSEMBLY
2MAIN BOARD D2 2(S2),(L2a)
*CN2a,*CN2b,*CN2c,CN2d,
CN2e,*CN2f,*CN2g,*CN2h,*CN2j
3OP BLOCK D3 2(S3),CUSHON (OP)
ASSEMBLY
(Incl. CCD BOARD
ASSEMBLY)
4FRAME ASSEMBLY D4 2(S4a),2(S4b),(S4c)
5
CASSETTE HOUSING D5 4(S5)
ASSEMBLY
STEP
/LOC
No. PART Fig.
No.
REMOVAL
*UNLOCK/RELEASE/
UNPLUG/UNCLAMP/
UNSOLDER
List of Abbreviations:
2(S1)=2 screws (S1)
4(L1a)=4 Locking Tabs (L1a)
CN=Connector
Reference Notes:
<NOTE 1>
Destination of connectors
Note :
Two kinds of double-arrows in connection tables
respectively show kinds of connector/wires.
⇔: Flat wire
←→ : Wire
Con-
nector Connector
CN1a 14 MAIN CN13 ⇔ZOOM UNIT
CN2a 14 MAIN CN2 ⇔SENSOR
CN2b 11 MAIN CN5 ⇔VIDEO/FLY. E HEAD
CN2c 10 MAIN CN1 ⇔DRUM MOTOR
CN2d 2 MAIN CN4 ←→ LOADING MOTOR
CN2e 2 MAIN CN6 ←→
DC LIGHT (For DC LIGHT
MODEL ONLY)
CN2f 22 MAIN CN15 ⇔OP BLOCK
CN2g 14 MAIN CN22 ⇔CCD
CN2h 11 MAIN CN7 ⇔A/C HEAD
CN2i 18 MAIN CN3 ⇔CAPSTAN MOTOR
No.of
Pins
Fig. D1
(L a)
1
CN a
1
(S )
1
1
(S )
1
2
(S )
1
3
(S )
1
4
1

1-9
Fig. D2 Fig. D4
Fig. D3 Fig. D5
(S )
2
5
(S )
2
6
CN a
2
CN b
2
CN c
2
CN e
2CN d
2
CN f
2CN g
2
CN h
2
CN j
2
(L a)
2
2
CUSHION (OP)
(S )
3
8
(S )
3
7
3
(S c)
13
4
∗
: 0.108 N
•
m (1.1 kgf
•
cm)
(S b)
11
4
∗
(S b)
12
4
∗
(S a)
10
SHIELD CASE
(MAIN) 4
(S a)
9
4
4
5
(S )
17
5
(S )
16
5
(S )
15
5
(S )
14
5
∗: 0.216 N
•
m (2.2 kgf
•
cm)
∗
∗
∗
∗

1-10
1.5 REPLACEMENT OF 3CCD 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 cham-
ois.
• 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 be-
fore 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 sen-
sor. 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 Orientation
CCD image sensor Mark is on the right viewed as indi-
cated by the arrow a.
Spacer rubber IC side is horizontal.
Optical LPF 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 orienta-
tion.
3. After completion of all P.C. boards to the camera sec-
tion, 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 as-
sembly.
Notes:
•
Remove the screw (S 1 b) only when the CCD board as-
sembly needs replacement.
• When installing a new CCD board assembly, carry out the
above-mentioned procedure in the reverse order.
Fig. 1-5-1
OPTICAL LPF
SPACER RUBBER
CCD SPACER
CCD BASE ASSEMBLY
a
OP
SIDE
CCD
SIDE
BLUE
CCD BOARD
ASSEMBLY
(S a)
1
1
(S a)
2
1
(S b)
3
1
∗: 0.147 N
•
m (1.5 kgf
•
cm)
∗

1-11
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 can-
not 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 dam-
age.
1. Disconnect the set from the power source.
2. 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).
3. Connect a jumper wire to each pole of the loading mo-
tor as shown by the magnified view (Fig. 1-6-1)
4. While holding down the cassette housing by hand, con-
nect 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 di-
rection 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 hous-
ing.
Fig. 1-6-1
MAGNIFIED VIEW b
BATTERY
TAKE-UP GEAR
TOP VIEW

1-12
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 al-
ternately 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
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.
R
D
N
E
.
E
C
X
Z
T
M
O
S
O
O
Y
D
M
S
E
TEM ME
S
5
N
P
0
U
x
MENU Wheel
Recording Start/Stop Button
A
M
P
L
A
Y
O
F
F
F
E
M
T
O
X
.
O
C
P
W
U
O
.
S
S
S
B
C
Y
U
.
A
S
R
M
T
E
E
E
R
M
A
M
M
E
E
N
A
A
A
N
U
U
U
U
U
T
T
T
O
O
O
R
I
T
T
D
D
T
E
N
E
I
A
E
R
O
C
T
L
T
T
M
E
.
E
L
E
O
T
C
T
E
/
U
S
A
I
T
M
T
M
R
Y
M
M
I
A
L
I
O
N
S
E
E
M
C
A
M
D
T
R
E
R
N
E
E
E
A
O
G
M
.
M
M
E
E
N
O
O
O
F
O
N
U
F
F
F
R
F
U
F
F
F
E
F
NCH
1. 2.
Display 1 Display 2
Fig. 1-8-1
See to
next page
Set the POWER switch to turn on
the “M”.
Press the MENU WHEEL once.
The first page of the DISPLAY
appears in the viewfinder.
Turn the MENU WHEEL in the
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.
Note: 1) The indications of the DISPLAY page very de-
pending on the setting.
2) How to cancel the DEMONSTRATION mode.
To cancel the DEMONSTRATION mode, turn the
POWER switch off (“POWER OFF”).
E. VF Symptom Mode when observed
E07 Short circuit of capstan MDA Power ON
E06 CAPSTAN FG input absent EDIT
E04 DRUM FF input absent DRUM rotation
E03 SUPPLY REEL FG input absent REC, PLAY, SEARCH, FF
E02 Mode control motor rotates for more than 10 sec UNLOADING
without shift to next mode
E01 Mode control motor rotates for more than 10 sec LOADING
without shift to next mode.
E00 Overtime the programming transaction REC, PLAY

1-13
Note:
2) As the “DEMO MODE” is executed, the camcoder
enters the DEMONSTRATION mode after the ti-
tle screen of “TITLE CALL” and “FUTURE” appear
in this order.
<Flow chart>
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
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
∫
Display 4Display 3
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.
DENO MODE
OFF
ON
EXIT
R
I
T
T
D
J
D
V
T
E
N
E
I
A
L
E
I
R
O
C
T
L
T
T
I
M
D
E
.
E
L
E
P
O
E
T
C
T
E
/
O
U
S
A
I
T
M
T
I
M
R
Y
M
M
I
A
L
I
D
O
O
N
S
E
E
M
C
A
M
D
U
T
R
E
R
N
E
N
E
T
E
A
O
G
O
M
.
.
M
M
E
E
N
O
O
O
F
0
O
S
N
U
F
F
F
R
6
N
E
U
F
F
F
EN
A
C
M
H
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.
The camcorder automatically en-
ters the DEMONSTRATION mode
and it repeats demonstration op-
eration.
While the camcorder is perform-
ing demonstration, all operations
except turning on/off the POWER
switch are ineffectual.
Fig. 1-8-2

1-14
1.9 SERVICE NOTE
Table 1-9-1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
1235
467(
8,9)
Fig. C6 Fig. C7
Fig. C5Fig. C4
Fig. C3
Fig. C1 Fig. C2
I
0-
II
VIII
IV
VI
Symbol No.
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
Symbol No.
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
Symbol No.
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
Symbol No.
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
25 26 27 28 29
Fig. C9
Fig. C8
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
123 4 5
Fig. D5
Fig. D2
Fig. D1
Fig. D3
Fig. D4
III
1 2 3
Fig. 1-5-1
DECK ASSEMBLY
OP B LOCK ASSEMBLY
MAIN ASSEMBLY
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
→
I: 0.196N·m (2.0kgf·cm) II : 0.098N·m (1.0kgf·cm) III : 0.118N·m (1.2kgf·cm)
IV : 0.108N·m (1.1kgf·cm) V: 0.147N·m (1.5kgf·cm)
VII VIII: 0.078N·m: 0.216N·m (2.2kgf·cm)
VI : 0.049N·m(0.5kgf·cm)
(0.8kgf·cm)
3
< NOTE >
1) : : Don’t reuse the screw, because screw lock bond was applied to them.
2) Pay careful attention to tightening torque for each screw.

2-1
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 ca-
ble.
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 trans-
port mechanism.)
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 identifica-
tion (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, un-
locked, 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 informa-
tion.
Roller Driver
PTU94002-2
Jig connector cable
YTU93106A
Cassette torque meter
PUJ50431-2
Alignment tape
MHP-C
Alignment tape
MHP-LC
Extension connector
YTU94145B-30
12
34
56
1ROLLER BASE ASSEMBLY T M1 (S1) –
2TENSION ARM ASSEMBLY T M1 (P1), (W1a) –
3REEL DISC (SUP) T M1 (W1a), (W1b) _
(1) (2) (3) (4) (5) (6)
(For Mechanism Parts)
STEP/LOC.
No. PART Fig.
No.
REMOVAL INSTALLATION
*UNHOOK/UNLOCK ADJUSTMENT
/RELEASE/UNPLUG CONDITION
/UNSOLDER NOTE
2.1.3 Required adjustment tools
1,2. Alignment tape
To be used for check and adjustment of interchangeabil-
ity 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.
Table 2-1-1

2-2
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 adjust-
ment and parts replacement should be performed in STOP mode. When reassembling, perform the step(s) in the reverse
order.
Table 2-2-1
1 ROLLER BASE ASSEMBLY T M1 (S1) –
2 TENSION ARM ASSEMBLY T M1 (P1), (W1a) –
3
4
REEL DISC (SUP) T M1 (W1a), (W1b) –
SLANT ARM ASSEMBLY T M1 (W1a) –
5 CANCEL LEVER ASSEMBLY T M2 (W2) –
6 EJECT LEVER ASSEMBLY T M2 (W2) –
7 CASSETTE GUIDE (L) ASSEMBLY T M2 (S2) –
8 SUPPLY CLUTCH ASSEMBLY T M2 (W2) –
9 WHEEL GEAR T M2 (W2) See, Adjustment procedure for
Section 2.3
0 ROTARY ENCODER B M3 4(S3a)
! TIMING BELT B M3 –
@ CENTER PULLEY UNIT T/B M3 2(S3a) –
# CASSETTE GUIDE (R) ASSEMBLY T M3 (S3b), (P3) (Only use S-VHS model)
$ TU GEAR T M3 (W3a) –
% BRAKE SUB GEAR T M3 (W3a) –
^ P.R ARM ASSEMBLY T M3 (W3b) –
& TU GUIDE ARM ASSEMBLY T M3 (W3a) –
* LINK ARM ASSEMBLY T M4 (W4) –
( LED GUIDE T M4 (S4a) –
) A/C HEAD UNIT T M4 2(S4b) –
q SLANT POLE BASE ASSEMBLY T M5 (S5a) –
w CAP MOTOR ASSEMBLY T M5 3(S5a) –
e MOTOR BASE T M5 2(S5b), (S5c) –
r BRUSH B M6 (S6a) –
t DRUM FINAL T/B M6 2(S6b), 2(S6c) * CATCHER –
y GUIDE RAIL T M6 8(S6d) –
u POLE BASE (SUP) T M6 –
i POLE BASE (TU) T M6 –
o COVER PLATE T M7 –
p DRIVE LEVER ASSEMBLY T M7 –
Q MOTOR BRACKET ASSEMBLY T M7 3(S7) –
CONTROL CAM T M8 (W8a) See, Adjustment procedure for
Section 2.3
E LINK LEVER T M8 –
R MIDDLE GEAR T M8 –
–
–
–
–
–
–
–
T LOADING GEAR(T) ASSEMBLY T M8 (W8b) See, Adjustment procedure for
Section 2.3
Y LOADING GEAR(S) ASSEMBLY T M8 (W8b) –
U LOADING RING ASSEMBLY T M8 4(S8) See, Adjustment procedure for
Section 2.3
STEP/LOC.
No. PART
REMOVAL INSTALLATION
*UNHOOK/UNLOCK ADJUSTMENT
/RELEASE/UNPLUG CONDITION
/UNSOLDER NOTE
Fig.
No.
The function of this part varies according
to the assembly (VHS/S-VHS) which this
part is rporated in.