JVC GR-DVM55U User manual

SERVICE MANUAL
No. 86615
March 2001
GR-DVM55U/DVM75U
SPECIFICATIONS
DIGITAL VIDEO CAMERA
Printed in Japan This service manual is printed on 100% recycled paper.
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
GR-DVM55U/DVM75U
No. 86615
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]
S40895-03
Camcorder
For General
Power supply : DC 11.0 V }(Using AC Adapter)
DC 7.2 V }(Using battery pack)
Power consumption
LCD monitor off, viewfinder on : Approx. 4.4 W (GR-DVM75), Approx. 4.0 W (GR-DVM55)
LCD monitor on, viewfinder off : Approx. 5.2 W (GR-DVM75), Approx. 4.8 W (GR-DVM55)
Dimensions (W x H x D) : 97 mm x 120 mm x 51 mm (3-7/8" x 4-3/4" x 2-1/16")
(with the LCD monitor closed and the viewfinder pushed back in)
Weight : Approx. 500 g (1.1 lbs) (GR-DVM75)
Approx. 470 g (1.1 lbs) (GR-DVM55)
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)
Pickup : 1/4" CCD
Lens : F 1.8, f = 3.6 mm to 36 mm, 10:1 power zoom lens
Filter diameter : ø27 mm
LCD monitor : 2.5" diagonally measured, LCD panel/TFT active matrix system
Viewfinder : Electronic viewfinder with 0.44" colour LCD
Speaker : Monaural
For Digital Video Camera
Format : DV format (SD mode)
Signal format : NTSC standard
Recording/Playback format : Video: Digital component recording
: Audio: PCM digital recording, 32 kHz 4-channel (12-bit),
48 kHz 2-channel (16-bit)
Cassette : Mini DV cassette
Tape speed : SP: 18.8 mm/s
LP: 12.5 mm/s
Maximum recording time : SP: 80 min.
(using 80 min. cassette) LP: 120 min.
For Digital Still Camera (GR-DVM75 only)
Storage media : SD Memroy Card/MultiMediaCard
Compression system : Still image : JPEG (compatible)
Moving image : MPEG4 (compatible)
File size : 2 modes (XGA: 1024 x 768 pixels/VGA: 640 x 480 pixels)
Picture quality : 2 modes (FINE/STANDARD)
Approximate number of storable images
(with the provided memory card [8 MB], with Sound Effects pre-stored)
FINE : 40 (VGA), 20 (XGA)
STANDARD : 130 (VGA), 60 (XGA)
(with an optional memory card [16 MB])
FINE : 100 (VGA), 40 (XGA)
STANDARD : 290 (VGA), 140 (XGA)
(with an optional memory card [32 MB])
FINE : 210 (VGA), 90 (XGA)
STANDARD : 610 (VGA), 290 (XGA)
(with an optional memory card [64 MB])
FINE : 430 (VGA), 190 (XGA)
STANDARD : 1230 (VGA), 600 (XGA)
For Connectors
AV
Video output : 1 V (p-p), 75 Ω, analog
Video input (GR-DVM75 only) : 0.8 V (p-p) – 1.2 V (p-p), 75 Ω, analog
Audio output : 300 mV (rms), 1 kΩ, analog, stereo
Audio input (GR-DVM75 only) : 300 mV (rms), 50 kΩ, analog, stereo
Headphone output (GR-DVM75 only) : Stereo
DV
Input/output : 4-pin, IEEE 1394 compliant
AC adapter AP-V10U
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
Dimensions (W x H x D) : 59 mm x 31 mm x 84 mm (2-3/8" x 1-1/4" x 3-5/16")
Weight : Approx. 130 g (0.29 lbs)
Jack Box
For General
Dimensions (W x H x D) : 52 mm x 22 mm x 73 mm (2-1/16" x 7/8" x 2-7/8")
Weight : Approx. 35 g (0.78 lbs)
For Connectors
USB (GR-DVM75 only) : Type B
EDIT (GR-DVM75 only) : ø3.5 mm, 2-pole
S-Video
Output : Y : 1 V (p-p), 75 Ω, analog
C : 0.29 V (p-p), 75 Ω, analog
Input (GR-DVM75 only) : Y : 0.8 V (p-p) – 1.2 V (p-p), 75 Ω, analog
C : 0.2 V (p-p) – 0.4 V (p-p), 75 Ω, analog
JLIP (GR-DVM55 only) : ø3.5 mm, 4-pole
PC (DIGITAL PHOTO)
(GR-DVM55 only) : ø2.5 mm, 3-pole
Specifications shown are for SP mode unless otherwise indicated. E & O.E. Design and specifications subject
to change without notice.

Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 BEFORE ASSEMBLY AND DISASSEMBLY ................................ 1-1
1.1.1 Precautions ........................................................................... 1-1
1.1.2 Assembly and disassembly .................................................. 1-1
1.1.3 Destination of connectors ..................................................... 1-1
1.1.4 Disconnection of Connectors (Wires) ................................... 1-1
1.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY,
ASSEMBLY AND ADJUSTMENT ................................................. 1-2
1.2.1 Tools required for adjustments .............................................. 1-2
1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS AND BOARD
ASSEMBLY .................................................................................. 1-2
1.3.1 Disassembly flow chart ......................................................... 1-2
1.3.2 Disassembly method ............................................................ 1-3
1.4 DISASSEMBLY OF 5MONITOR ASSEMBLY ............................. 1-8
1.4.1 5Monitor assembly/Hinge assembly ................................... 1-8
1.4.2 Hinge assembly .................................................................... 1-8
1.5 DISASSEMBLY OF 7OP BLOCK ASSEMBLY/CCD BOARD
ASSEMBLY .................................................................................. 1-9
1.5.1 Precautions ........................................................................... 1-9
1.5.2
How to remove OP block assembly and CCD board assembly 1-9
1.5.3 How to install OP block assembly and CCD board assembly 1-9
1.5.4 Replacement of service parts ............................................... 1-9
1.6 DISASSEMBLY OF 9E VF ASSEMBLY .................................... 1-10
1.6.1 9E VF assembly ................................................................ 1-10
1.7 EMERGENCY DISPLAY ............................................................ 1-11
1.8 SERVICE NOTE ......................................................................... 1-12
2. MECHANISM ADJUSTMENT
2.1 PRELIMINARY REMARKS ON ADJUSTMENT AND REPAIR .... 2-1
2.1.1 Precautions ........................................................................... 2-1
2.1.2 Notes on procedure for disassemby/assembly ..................... 2-1
2.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY, ASSEMBLY
AND ADJUSTMENT .................................................................... 2-2
2.2.1 Tools required for adjustments .............................................. 2-2
2.3 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY ........ 2-3
2.3.1 General statement ................................................................ 2-3
2.3.2 Explanation of mechanism mode .......................................... 2-3
2.3.3 Mechanism timing chart ........................................................ 2-4
2.4 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY ........ 2-5
2.4.1 Follow chart .......................................................................... 2-5
2.4.2 Disassembly/assembly ......................................................... 2-8
2.4.3 List of procedures for disassembly ..................................... 2-14
2.5 CHECKUP AND ADJUSTMENT OF MECHANISM PHASE ...... 2-15
2.6 MECHANISM ADJUSTMENTS .................................................. 2-16
2.6.1 Assembling slide deck assembly and main deck assembly 2-16
2.6.2 Locating tension pole .......................................................... 2-17
2.7 SERVICE NOTE ......................................................................... 2-18
2.8 JIG CONNECTOR CABLE CONNECTION ................................ 2-20
3. ELECTRICAL ADJUSTMENT
3.1 PRECAUTION .............................................................................. 3-1
3.2 SETUP ......................................................................................... 3-2
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM ................................................. 4-1
CIRCUIT BOARD NOTES .................................................................. 4-2
4.1 BOARD INTERCONNECTIONS [GR-DVM55U] .......................... 4-3
4.2 BOARD INTERCONNECTIONS [GR-DVM75U] .......................... 4-5
TABLE OF CONTENTS
Section Title Page Section Title Page
4.3 SYSCON SCHEMATIC DIAGRAM [GR-DVM55U] .......................... 4-7
4.4 SYSCON SCHEMATIC DIAGRAM [GR-DVM75U] .......................... 4-9
4.5 PC IF SCHEMATIC DIAGRAM [GR-DVM55U] ............................. 4-11
4.6 PC IF SCHEMATIC DIAGRAM [GR-DVM75U] ............................. 4-13
4.7 DVMAIN SCHEMATIC DIAGRAM [GR-DVM55U] ......................... 4-15
4.8 DVMAIN SCHEMATIC DIAGRAM
[GR-DVM75U] ......................... 4-17
4.9 SERVO SCHEMATIC DIAGRAM ...................................................... 4-19
4.10 PRE/REC SCHEMATIC DIAGRAM ............................................... 4-21
4.11 V OUT SCHEMATIC DIAGRAM
[GR-DVM55U] ........................ 4-23
4.12 V OUT SCHEMATIC DIAGRAM
[GR-DVM75U] ........................ 4-25
4.13 CAM DSP SCHEMATIC DIAGRAM
[GR-DVM55U] ................... 4-27
4.14 CAM DSP SCHEMATIC DIAGRAM [GR-DVM75U] ................... 4-29
4.15 ANA IN SCHEMATIC DIAGRAM [GR-DVM75U] ........................... 4-31
4.16 TG/V.DRV SCHEMATIC DIAGRAM .............................................. 4-33
4.17 REG SCHEMATIC DIAGRAM ....................................................... 4-35
4.18 STO SENS SCHEMATIC DIAGRAM [GR-DVM75U] .................... 4-37
4.19 VF MAIN SCHEMATIC DIAGRAM ................................................ 4-39
4.20 DSC SCHEMATIC DIAGRAM [GR-DVM75U] ............................... 4-41
4.21 USB DRV SCHEMATIC DIAGRAM [GR-DVM75U] ....................... 4-43
4.22 MP3 SCHEMATIC DIAGRAM [GR-DVM75U] ............................... 4-45
4.23 W/B SCHEMATIC DIAGRAM ........................................................ 4-47
4.24 CCD SCHEMATIC DIAGRAM ....................................................... 4-48
4.25 MDA SCHEMATIC DIAGRAM ....................................................... 4-49
4.26 IR TALLY SCHEMATIC DIAGRAM ............................................... 4-51
4.27 OP DRIVER SCHEMATIC DIAGRAM ........................................... 4-53
4.28 MONITOR SCHEMATIC DIAGRAM .............................................. 4-55
4.29 JUNCTION SCHEMATIC DIAGRAM ............................................. 4-57
4.30 STROBE SCHEMATIC DIAGRAM [GR-DVM75U] ........................ 4-59
4.31 AUDIO AD/DA SCHEMATIC DIAGRAM ....................................... 4-61
4.32 MAIN AUDIO SCHEMATIC DIAGRAM ......................................... 4-63
4.33 A/HP SEL. SCHEMATIC DIAGRAM .............................................. 4-65
4.34 JACK SCHEMATIC DIAGRAM ...................................................... 4-67
4.35 WB SENS, CAMERA OPE. UNIT, DECK OPE. ASSY AND
SUB OPE. UNIT SCHEMATIC DIAGRAMS .................................. 4-69
4.36 MAIN CIRCUIT BOARD [GR-DVM55U] ........................................ 4-71
4.37 MAIN CIRCUIT BOARD [GR-DVM75U] ........................................ 4-77
4.38 MDA CIRCUIT BOARD .................................................................. 4-83
4.39 CCD AND JUNCTION CIRCUIT BOARDS ................................... 4-85
4.40 MONITOR CIRCUIT BOARD ......................................................... 4-87
4.41 AUDIO CIRCUIT BOARD .............................................................. 4-89
4.42 STROBE, W/B AND JACK CIRCUIT BOARDS ............................ 4-91
4.43 VOLTAGE CHARTS ...................................................................... 4-93
4.44 POWER SYSTEM BLOCK DIAGRAM .......................................... 4-97
4.45 VIDEO SYSTEM BLOCK DIAGRAM ............................................. 4-99
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> ........................ 5-8
5.5 MONITOR ASSEMBLY <M5> ..................................................... 5-9
5.6 ELECTRICAL PARTS LIST ........................................................ 5-10
MAIN BOARD ASSEMBLY <01> ................................................... 5-10
MDA BOARD ASSEMBLY <02> ..................................................... 5-19
CCD BOARD ASSEMBLY <03> ..................................................... 5-21
MONITOR BOARD ASSEMBLY <04> ............................................ 5-21
JUNCTION BOARD ASSEMBLY <06> .......................................... 5-22
STROBE BOARD ASSEMBLY (DVM75U) <07> ............................ 5-22
AUDIO BOARD ASSEMBLY <08> ................................................. 5-23
JACK BOARD ASSEMBLY <09> ................................................... 5-25
W/B BOARD ASSEMBLY <11> ...................................................... 5-25
GR-DVM55U GR-DVM75U
VIDEO FLASH NOT USED USED
DSC FLASH MEMORY NOT USED USED
ANLOG INPUT NOT USED USED
AV INPUT/S INPUT NOT USED USED
HEAD PHONE OUTPUT NOT USED USED
DIGITAL STILL OUTPUT NOT USED USED
MEMORY CARD NOT USED USED (8MB)
JACK BOX CU-V505 CU-V506
USB TERMINAL NOT USED USED
JLIP/EDIT TERMINAL NOT USED USED
EDIT CONTROL OUTPUT NOT USED USED
The following table lists the differing points between Models GR-DVM55U and GR-DVM75U in this series.

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) (5)
SECTION 1
DISASSEMBLY
1.1.4 Disconnection of Connectors (Wires)
Connector
Pull both ends of the connector in the arrow direction, re-
move the lock and disconnect the flat wire.
1.1 BEFORE ASSEMBLY AND DISASSEMBLY
1.1.1 Precautions
1. Be sure to remove the power supply unit prior to mount-
ing and soldering of parts.
2. When removing a component part that needs to discon-
nect the connector and to remove the screw for remov-
ing itself, first disconnect the connecting wire from the
connector and then remove the screw beforehand.
3. When connecting and disconnecting the connectors, be
careful not to damage the wire.
4. Carefully remove and handle the part to which some
spacer or shield is attached for reinforcement or insula-
tion.
5. When replacing chip parts (especially IC parts), desolder
completely first (to prevent peeling of the pattern).
6. Tighten screws properly during the procedures.
Unless specified otherwise, tighten screws at a torque
of 0.078N•m(0.8kgf•cm).
1.1.2 Assembly and disassembly
(1) Indicate the disassembly steps. When assembling, per-
form in the reverse order of these steps. This number
corresponds to the number in the disassembly diagram.
(2) Indicates the name of disassembly/assembly parts.
(3) Indicates the number in the disassembly diagram.
(4) Indicates parts and points such as screws, washers,
springs which must be removed during disassembly/
assembly.
Symbol Name, Point
S Screw
L Lock, Pawl, Hook
SD Soldering
夡(Others) Connector, Cover, Bracket, etc.
(Example)
• 2 (S1) : Remove the two screws (S1) for removing the
part 1.
• CN 1a: Disconnect the connector 1a.
• SD1 : Unsolder at the point SD1.
(5) Precautions on disassembly/assembly.
1.1.3 Destination of connectors
Note:
Three kinds of double-arrows in connection tables re-
spectively show kinds of connector/wires.
↔: Wire
⇔: Flat wire (FPC, FFC)
: Board to Board connector
[Example]
Fig. 1-1-1 Connector 1
Connector
Flat wire
Fig. 1-1-2 Connector 2
Connector
Flat wire
Extend the locks in the direction of the arrow for unlocking
and then pull out the wire. After removing the wire, immedi-
ately restore the locks to their original positions because
the locks are apt to come off the connector.
B-B connector
Pull the board by both the sides in the direction of the ar-
row for disconnecting the B-B connector.
Fig. 1-1-3 Connector 3
Connector
Connector
Fig. 1-1-4 Connector 4
Connector
1DECK OPE ASSY Fig.1-3-1 2(S1), (L1)—
聽CN1a
2MIC UNIT 2(S2),2(L2) NOTE2
聽CN2a
3FRONT COVER Fig.1-3-2 COVER(DV),(S3a),3(S3b) NOTE3a
ASSY 2(S3c),(S3d),STUD(HOOK) NOTE3b
(L3)
聽CN3a
STEP
No. PART Fig.No. POINT NOTE
CONN.
No. Pin No.
CONNECTOR
1a DECK OPE UNIT - ⇔AUDIO VF CN803 6
2a AUDIO VF CN804 ⇔MIC UNIT - 4

1-2
1.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY,
ASSEMBLY AND ADJUSTMENT
1.2.1 Tools required for adjustments
1. Torque driver
Be sure to use to fastening the mechanism and exterior
parts because those parts must strictly be controlled for
tightening torque.
2. Bit
This bit is slightly longer than those set in conventional
torque drivers.
3. Tweezers
To be used for removing and installing parts and wires.
4. Chip IC replacement jig
To be used for adjustment of the camera system.
5. 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
AND BOARD ASSEMBLY
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.
Table 1-2-1
Table 1-3-1
Torque Driver
YTU94088
1
Bit
YTU94088-003
2
3
Chip IC Replacement Jig
PTS40844-2
4
5
Cleaning Cloth
KSMM-01
Tweezers
P-895
2
3
1
4
5
6
8
#
0
9
7
!
DECK OPE ASSY
MIC UNIT
FRONT COVER ASSY
UPPER CASE ASSY
(Inc.MONITOR ASSY)
MONITOR ASSY
LOWER CASE ASSY
(Inc.OP BLOCK ASSY
/STROBE ASSY/VF UNIT
/AUDIO BOARD ASSY)
OP BLOCK ASSY
STROBE ASSY
E.VF ASSY
AUDIO BOARD ASSY
MDA BOARD ASSY
MAIN BOARD ASSY
MECHANISM ASSY
@

1-3
STEP
No. PART Fig.No. POINT NOTE
1.3.2 Disassembly method
Table 1-3-2
NOTE 2: Beware of electrical shock due to the capacitor during work.
(GR-DVM75U ONLY)
NOTE 3a: When disassembling the Front Cover Assembly, remove
the screws, pull out the studs and free the grip belt.
NOTE 3b: When attaching the assembly, make sure that the strobe
block fits properly into the frame.
(GR-DVM75U ONLY)
NOTE 4a: Remove the Upper Case Assembly before removing the
Monitor Assembly
5
.
NOTE 4b: Take care not to damage the parts (battery terminals).
NOTE 4c: Take care not to damage the parts (spring).
NOTE 5: Refer to Fig. 1-4-1 for the disassembly method.
NOTE 6a: Remove the board assemblies (Main/MDA) and Mecha-
nism Assembly together.
NOTE 6b: When removing, take care not to disconnect the wire
or damage any of the parts.
NOTE 6c: When attaching, be careful of the board attaching position.
NOTE 7a: Remove the OP Block Assembly together with the
Strobe Assembly. Beware of electrical shock due to the
capacitor during work.
(GR-DVM75U ONLY)
NOTE 7b: When removing, take care not to disconnect the wire
or damage any of the parts.
NOTE 7c: Refer to Fig. 1-5-1 for the disassembly method.
NOTE 8: Beware of electrical shock due to the capacitor during work.
(GR-DVM75U ONLY)
NOTE 9a: When removing, be careful with the FPC (for the Deck
Operation Assembly) attached inside the E.VF Assem-
bly.
Remove the FPC by unplugging it from the connector
and then taking the FPC out together with the E. VF or
by peeling it carefully so that the double-sided adhesive
can be reused later.
NOTE 9b: When removing or attaching, take care not to damage
any parts.
Particularly, when attaching the switch, always pull out
the E.VF Assembly to avoid it from damaging the switch.
NOTE 9c: When attaching, be careful with the wire treatment.
NOTE 9d: Refer to Fig. 1-6-1 for the disassembly method.
NOTE 0a: When attaching or removing, take care not to damage
any parts.
Attach the slide switch at the position of the DSC
switch (VIDEO side).
(GR-DVM75U ONLY)
NOTE 0b: When attaching, take care with the wire treatment.
This note does not apply when the E.VF Assembly and
FPC have been removed together as shown in Fig. 1-3-
8.
NOTE !a: When unplugging the connector
!
d, be careful with the
handling of the FPC connected to it.
NOTE !b: Connector
!
e is located inside the circuit board, so it
should be the last item to be removed.
NOTE !c, @: When attaching, pay heed to the FPC treatment.
Mount the FPC so that it is caught between the Mecha-
nism Assembly and the Main Board Assembly.
CONN.
No. Pin No.
CONNECTOR
Table 1-3-3
Note:
Remove the parts marked in .
1a DECK OPE ASSY - ⇔AUDIO VF CN803 6
2a AUDIO VF CN804 ←→ MIC UNIT - 4
3a JACK CN901 ⇔MAIN CN103 18
4a MDA CN207 ⇔SUB OPE ASSY - 7
4b MAIN CN104 ←→ W/B - 3
4c MAIN CN106 ⇔MONITOR CN761 45/39
4d MAIN CN112 ⇔J.BOX/MENU - 16
6a MAIN CN101 AUDIO CN801 80
6b MAIN CN107 ⇔CCD - 20
6c MAIN CN109 ⇔STROBE - 12
6d MDA CN205 ⇔OP BLOCK ASSY - 24
6e MAIN CN208 ⇔JUNCTION CN601 20
7a AUDIO CN805 ⇔E VF ASSY - 16
9b AUDIO CN803 ⇔FPC - 6
!a MDA CN202 ⇔DRUM MOTOR - 11
!b MDA CN201 ⇔LOADING MOTOR - 6
!c MDA CN203 ⇔CAPSTAN MOTOR - 18
!d MAIN CN102 MDA CN206 80
!e MDA CN204 ⇔SENSOR - 15
@a MAIN CN110 ⇔HEAD - 8
@b MAIN CN111 ⇔ROTARY ENCODER - 6
1DECK OPE ASSY Fig.1-3-1 2(S1), (L1)—
聽CN 1a
2MIC UNIT 2(S2), 2(L2) NOTE2
聽CN 2a
3FRONT COVER Fig.1-3-2 COVER(DV), (S3a), 3(S3b) NOTE3a
ASSY 2(S3c), (S3d), STUD(HOOK) NOTE3b
(L3)
聽CN 3a
4
UPPER CASE ASSY Fig.1-3-3 (S4a), 2(L4), LOCK(MONITOR) NOTE4a
(Inc.MONITOR (S4b), (S4c), (S4d), 2(S4e) NOTE4b
ASSY) 聽CN 4a, 4b, 4c, 4d NOTE4c
5MONITOR ASSY Fig.1-3-4 (S5a),(S5b) NOTE5
6
LOWER CASE ASSY Fig.1-3-5 聽CN 6a, 6b,6c, 6d, 6e NOTE6a
(
Inc.OP BLOCK ASSY (S6a), 4(S6b) NOTE6b
/STROBE ASSY NOTE6c
/E. VF ASSY
/AUDIO BOARD
ASSY)
7OP BLOCK ASSY Fig.1-3-6 2(S7),2(L7) NOTE7a
NOTE7b
NOTE7c
8STROBE ASSY Fig.1-3-7 (S8), GR-DVM75U ONLY NOTE8
9E.VF ASSY Fig.1-3-8 聽CN 9a, (9b) NOTE9a
(S9), 2(L9) NOTE9b
NOTE9c
NOTE9d
0
AUDIO BOARD ASSY Fig.1-3-9 SPACER,(S0a),3(S0b),(L0a) NOTE0a
(L0b),BRACKET(TOP) NOTE0b
!
MDA BOARD ASSY Fig.1-3-10 聽CN !a, !b, !c, (S!) NOTE!a
CN !d, !e NOTE!b
NOTE!c
@ MAIN BOARD ASSY (S@a), (L@), SHIELD PLATE NOTE@
聽CN @a, @b, (S@b)
# MECHANISM ASSY (S#a), 2(S#b), 2(L#)—
BRACKET(MECHA)

1-4
Fig. 1-3-3
Fig. 1-3-2
3
COVER
(DV)
GRIP BELT
STUD
(HOOK) HOOK
(S a)
5
3
(L )
3
NOTE a
3
a
3
NOTE b
3
NOTE b
3
(S b)
6
3
(S b)
7
3
(S b)
7
3
(S d)
11
3(S d)
11
3
(S b)
8
3
(S b)
8
3
(S c)
9
3
(S c)
10
3
CN
: 0.118N·m (1.2kgf·cm)
: 0.098N·m (1.0kgf·cm)
LOCK
(MONITOR)
(S b)
13
4
(S d)
15
4
(S e)
16
4
(S c)
14
4
NOTE a
4
NOTE c
4
NOTE b
4
CN c
4
CN b
4
CN a
4
CN d
4
(S a)
12
4
(L )
4
4
5
(S e)
17
4
CN
2
1
(L )
2
(S )
1
1
(S )
2
3(S )
2
4
(S )
1
2
NOTE 2
a
2
CN a
1
(L )
1
Fig. 1-3-1

1-5
Fig. 1-3-5
Fig. 1-3-4
5
4
(S b)
19
5
(S a)
18
5
NOTE 5
: 0.198N·m (2.0kgf·cm)
6
(S b)
23
6
(S b)
23
6(S b)
24
6
(S b)
21
6
NOTE a,b
6
(S b)
24
6
(S a)
20
6
(S b)
22
6
NOTE c
6
CN a
6
CN c
6
CN b
6
CN e
6
CN d
6
TAPE

1-6
Fig. 1-3-6
7
8
(S )
25
7
(L )
7
(S )
26
7NOTE b
7
NOTE c
7
NOTE a
7
Fig. 1-3-7
Fig. 1-3-8
7
8
(S )
27
8
NOTE 8
: 0.147N·m (1.5kgf·cm)
CN803(AUDIO)
NOTE
SWITCH
FPC
a
9
9
NOTE d
9
NOTE b
9
NOTE c
9
CN a
9
CN b
9
NOTE b
9
NOTE b
9
(L )
9
(L )
9
(S )
28
9
NOTE a
9
<TOP VIEW>
: 0.098N·m (1.0kgf·cm)
or

1-7
Fig. 1-3-10
12
13
(S b)
37
BRACKET
(MECHA)
13
(S b)
35
12
(S a)
36
13
NOTE a
11
CN b
12
CN d
11
CN a
12
NOTE c
11
NOTE b
11
NOTE e,
11 12
NOTE a
11
(S b)
38
13
(S a)
34
12
(S )
33
11
(L )
13
(L )
12
SHIELD
PLATE
11
CN c
11
CN e
11
CN a
11
CN b
11
CN d
11
10
(L b)
10
NOTE
BRACKET
(TOP)
SWITCH
SPACER
a
10
NOTE b
10
(S b)
30
10
(S b)
32
10
(S b)
31
10
(S a)
29
10
(L a)
10
: 0.098N·m (1.0kgf·cm)
Fig. 1-3-9

1-8
Fig. 1-4-1
BACK
LIGHT
MONITOR
BOARD
ASSY
MONITOR
COVER ASSY
LCD
MODULE
MONITOR CASE
: 0.098N·m (1.0kgf·cm)
: 0.069N·m (0.7kgf·cm)
(L e)
5
(L a)
5
(L b)
5
NOTE b
5
(S d)
3
5
(S c)
2
5
CN b
5
CN a
5
(S c)
1
5
(S f)
5
5
(S f)
6
5
(S e)
4
5
(L c)
5
(L g)
5
(L f)
5
(L d)
5
NOTE
FPC ASSY
d
5
NOTE a
5
NOTE d
5
NOTE
MARING
INSIDE
c
5NOTE a
5
NOTE c
MAGNET
HINGE
COVER(U)
5
FPC ASSY
HINGE
COVER(L)
HINGE
ASSY
HINGE
ASSY
1.4 DISASSEMBLY OF 5MONITOR ASSEMBLY
1.4.1 5Monitor assembly/Hinge assembly
1. Remove the four screws (1-4). While opening the moni-
tor cover assembly as shown by the arrow, release the
two hooks (L5a, L5b) from engagement and remove
the monitor cover assembly.
2. Remove the parts out of the monitor case and unlock
the connector CN5a. While raising the hinge assem-
bly upwards, get the two hooks (L5c, L5d) disengaged
and disconnect the FPC by pulling it out. Then, remove
the hinge assembly.
Note5a:
When removing the parts out of the monitor case
assembly, be very careful not to damage the FPC
and parts.
3. Disconnect FPC from the connector CN5b and then re-
move the MONITOR board assembly and backlight.
Note5b:
Remove the MONITOR board assembly and
backlight together unless it is needed to separate
them from each other for part replacement, etc.,
because the two are soldered to each other.
4. Remove the LCD module.
1.4.2 Hinge assembly
1. Remove the two screws (5, 6). While releasing the two
hooks (L5f, L5g) from engagement, remove the hinge
cover (U).
Note5c:
Be careful not to lose any part during the above-
mentioned process.
2. Draw the FPC assembly out of the hinge cover (L) and
then remove the FPC assembly from the hinge assem-
bly.
Note5d:
When reassembling, wind the FPC assembly
around the hinge assembly by three turns and a
half.
Be careful not to break the FPC wire during the
work.

1-9
Fig. 1-5-1
1.5 DISASSEMBLY OF 7OP BLOCK ASSEMBLY/CCD
BOARD ASSEMBLY
1.5.1 Precautions
1. Carefully handle the CCD image sensor, optical LPF,
lens, etc. during the disassembly work. Pay the most
careful attention to the surface of those parts not to get
it soiled, scratched or dusty. If some of those surfaces
gets soiled with fingerprints, etc., wipe it out with silicone
paper, clean chamois, cleaning cloth or the like.
2. The new CCD image sensor is occasionally shipped from
the factory as a protection seal is applied onto its trans-
parent glass. If so, leave the protection seal as it is and
remove it just before installing the CCD image sensor in
the OP block assembly.
1.5.2 How to remove OP block assembly and CCD
board assembly
1. Unsolder at the fourteen points (SD1) and remove the
CCD board assembly.
2. Remove the two screws (1, 2) and then remove the CCD
base assembly.
Note7a:
Carefully remove the CCD base assembly, be-
cause the space rubber and optical LPF may be
removed together with the CCD image sensor.
Note7b: When replacing the CCD image sensor, don’t re-
place it individually but replace the CCD base as-
sembly in whole with a new one.
1.5.3 How to install OP block assembly and CCD board
assembly
1. Install the optical LPF with the space rubber fitted to its
CCD side in the OP block assembly.
2. Paying heed to the space rubber not to get it to come
off the setting position, install the CCD base assembly
in place and fasten it together with the space rubber with
the two screws (1, 2).
3. Set the CCD board assembly in the CCD base assem-
bly, and fasten it by soldering at the fourteen points
(SD1).
1.5.4 Replacement of service parts
Service parts to be supplied for the OP block assembly are
as follows.
When replacing a part, be very careful not to get the FPC
wire broken or damaged by soldering (overheating).
1. Focus motor
2. Zoom motor
3. Iris motor unit
Note7c:
When soldering the FPC wire of the focus motor
or zoom motor during the replacement work, be
sure to keep the tip of a soldering iron approxi-
mately 1 mm above the terminal.
Note7d: The iris motor unit includes one FPC assembly
and two sensors.
2
35
4
1
OP BLOCK ASSEMBLY
(SD1)
NOTE7c
FOCUS MOTOR
NOTE7c
ZOOM MOTOR
NOTE7a,b
CCD
BASE ASSEMBLY
CCD BOARD
ASSEMBLY
NOTE7c,d
IRIS MOTOR UNIT
NOTE7a
NOTE7a
SPACER
OPTICAL LPF
BLUE
OP
SIDE
CCD
SIDE
67
8
9
(b)
7(b)
7
(d)
7
(d)
7
(a)
7
(a)
7
(d)
7
(d)
7
(c)
7
: 0.118N·m (1.2kgf·cm)

1-10
Fig. 1-6-1
1.6 DISASSEMBLY OF 9E VF ASSEMBLY
1.6.1 9E VF assembly
Note9a:
When disassembling the E VF assembly, remove
the frame (VF) from the case/cap assembly de-
pending on the situation.
Note9b: Be very careful not to get the inside of the VF
soiled or dusty during and after disassembling the
E VF assembly.
Note9c: After the screw having the loose-proof tip was
once removed from the E VF assembly, don’t re-
use it.
1. Remove the eyecup and pull out the guide (VF).
2. Draw the frame (VF) out of the case assembly.
<Case assembly>
3. Remove the screw (1) first and then lever (VF).
4. Remove the three screws (2-4) and draw out the eye-
piece sub assembly.
<Frame (VF)>
5. Remove the screw (5) first and then LCD module/holder
(LCD).
Note9d:
Pay heed to the FFC not to damage it during the
removing work.
6. Get the two hooks (L9a, L9b) disengaged and then re-
move the holder (LCD)
Note9e:
Carefully proceed with the above-mentioned work
not to damage any part.
7. Disconnect the connector (CN9a) and remove the LCD
module.
Note9f: Pay heed the parts not to damage any thing.
7
6
EYE CUP
GUIDE(VF)
CASE/CAP 2
CAP
(VF)
1
3
4
5
HOLDER
(LCD)
LCD MODULE
B/L SUB ASSY
FRAME(VF)
FFC
: 0.069N·m (0.7kgf·cm)
: 0.098N·m (1.0kgf·cm)
EYE PIECE
SUB ASSY
NOTE e
9
(L b)
9
(L a)
9
CN a
9
NOTE f
9
NOTE a
9
NOTE d
9
NOTE a
9

1-11
1. The CAPSTAN FG signal is not received by the syscon
CPU.
1) Disconnection in the middle of the signal line.
2) Failure of the CAPSTAN FG pulse generator (MR
element).
2. No capstan control voltage is supplied to the MDA.
3. No power is supplied to the CAPSTAN MDA.
4. The capstan cannot be started or capstan rotation is
stopped because tape transport load is too high.
1) Tape tension is extremely high. (Mechanical lock-
ing)
2) The tape is damaged or soiled with grease, etc.
(Tape tangling occurs, etc.)
1.7 EMERGENCY DISPLAY
Whenever some abnormal signal is input to the syscon CPU,
an error number (E01, as an example) is displayed on the
LCD monitor or (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.
E01
UNIT IN
SAFEGUARD MODE
E01
REMOVE AND
REATTACH BATTERY
Example (in case of the error number E01):
E01 LOADING
LCD
display
Emergency
mode Details Possible cause
In the case the encoder position is not shifted
to the next point though the loading motor has
rotated in the loading direction for 4 seconds
or more. This error is defined as [E01].
1. The mechanism is locked during mode shift.
2. The mechanism is locked at the mechanism loading
end, because the encoder position is skipped during
mechanism mode shift.
3. No power is supplied to the loading MDA.
E02 UNLOADING In the case the encoder position is not shifted
to the next point though the loading motor has
rotated in the unloading direction for 4 seconds
or more. This error is defined as [E02].
1. The mechanism is locked during mode shift.
2. The mechanism is locked at the mechanism loading
end, because the encoder position is skipped during
mechanism mode shift.
E03 TU & SUP REEL
FG
In the case no REEL FG is produced for 4 sec-
onds or more in the capstan rotation mode af-
ter loading was complete, the mechanism mode
is shifted to STOP with the pinch roller set off.
This error is defined as [E03].
However, no REEL EMG is detected in the
SLOW/STILL mode.
1. The idler gear does not engage with the reel disk well.
2. Though the idler gear and reel disk are engaged with
each other, the tape is not wound because of over-
load to the mechanism.
3. No FG pulse is output from the reel sensor.
4. No power is supplied to the reel sensor.
5. Tape transport operation takes place with a cassette
having no tape inside.
6. The tape slackens and no pulse is produced until the
slack is taken up and the tape comes into the normal
status.
E04 DRUM FG In the case there is no DRUM FG input in the
drum rotation mode for 4 seconds or more.This
error is defined as [E04], and the mechanism
mode is shifted to STOP with the pinch roller
set off.
1. The drum cannot be started or drum rotation is stopped
because tape transport load is too high.
1) Tape tension is extremely high.
2) The tape is damaged or soiled with grease, etc.
2. The DRUM FG signal is not received by the syscon
CPU.
1) Disconnection in the middle of the signal line.
2) Failure of the DRUM FG pulse generator (hall ele-
ment).
3. No drum control voltage is supplied to the MDA.
4. No power is supplied to the DRUM MDA.
E05 –––
E06 CAPSTAN FG In the case no CAPSTAN FG is produced in
the capstan rotation mode for 2 seconds or
more. This error is defined as [E06], and the
mechanism mode is shifted to STOP with the
pinch roller set off.
However, no CAPSTAN EMG is detected in the
STILL/FF/REW mode.
(DVC_03)
Table 1-7-1

1-12
1.8 SERVICE NOTE
Table 1-8-1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
12345
Fig. 1-3-1 Fig. 1-3-2 Fig. 1-3-3 Fig. 1-3-4
I I II I IVIII
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
8
7/
5
MONITOR ASSY
6980-=~
Fig. 1-3-5 Fig. 1-3-6 Fig. 1-3-7 Fig. 1-3-8 Fig. 1-3-9 Fig. 1-3-10
I IV III III
Fig. 1-4-1
III VI
I
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
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
Removing order of screw
Place to stick screw
Reference drawing
Screw tightening torque
1234 56
1234 567
9
VF ASSY
7
OP BLOCK ASSY
Fig. 1-5-1
II VI VI
1234 56789
< NOTE >
1) : : Dont’t reuse the screw, because screw lock bond was applied to them.
2) Pay careful attention to tightening torque for each screw.
I: 0.078N·m (0.8kgf·cm) II : 0.118N·m (1.2kgf·cm) III : 0.098N·m (1.0kgf·cm)
IV: 0.198N·m (2.0kgf·cm) V: 0.147N·m (1.5kgf·cm) VI : 0.069N·m (0.7kgf·cm)
Fig. 1-6-1

2-1
SECTION 2
MECHANISM ADJUSTMENT
2.1 PRELIMINARY REMARKS ON ADJUSTMENT AND
REPAIR
2.1.1 Precautions
1. When fastening parts, pay careful attention to the tight-
ening torque of each screw. Unless otherwise specified,
tighten a screw with the torque of 0.039 N•m (0.4 kgf•cm).
2. Be sure to disconnect the set from the power supply be-
fore fastening and soldering parts.
3. When disconnecting/connecting wires, be careful not to
get them and their connectors damaged. (Refer to the
Section 1.)
4. When replacing parts, be very careful neither to dam-
age other parts nor to fit wrong parts by mistake.
2.1.2 Notes on procedure for disassemby/assembly
The disassembling procedure table (Table 2-4-1 on page
2-6,a part of the table is shown below for reference)shows
the procedure to disassemble/reassemble mechanism
parts.
Carefully read the following explanation before starting ac-
tual disassembling/reassembling work. The item numbers
(circled numbers)in the following explanation correspond
to those appearing under respective columns of the table.
(1) Circled numbers appearing in this column indicate the
order to remove parts. When reassembling, follow these
numbers in the reverse order. Circled numbers in this
column correspond to those appearing in drawings of
this section.
(2) This column shows part names corresponding to circled
numbers in the left column.
(3) The symbol (T or B)appearing in this column shows the
side which the objective part is mounted on.
T =the upper side, B =the lower side
(4) Symbols appearing in this column indicate drawing
numbers.
Step Part Name Fig. Point Note Remarks
(5) This column indicates parts and points such as screws,
washers,springs,and others to be removed/fitted for dis-
assembling/reassembling the mechanism. Besides such
the parts, this column occasionally indicates working
points.
P = Spring
W = Washer
S = Screw
* = Lock (L),soldering (SD),shield,connector (CN),
etc.
Example • Remove ((W1)=Washer W1.
• **Remove the solder at (SD1)=Point SD1.
• **Disconnect Å=Connector Å.
(6) Numbers in this column represent the numbers of notes
in the text.For example, “1” means “Note 1”.
(For parts that need phase adjustment after reassem-
bling, refer to “2.6 MECHANISM ADJUSTMENTS”.)
(7) This column indicates required after-disassembling/-re-
assembling work such as phase adjustment or mecha-
nism adjustment.
(1) (2) (3) (4) (5) (6) (7)
NO. PART NAME FIG. POINT NOTE REMARKS
A Cassette housing assembly T Fig. 2-4-5 3(S1),(L1a)-(L1d) 1a, 1b, 1c, 1d Adjustment
2a Reel disk (SUP) assembly T Fig. 2-4-6 (W2) 2a, 2b
2b Reel disk (TU) assembly T Fig. 2-4-6 (W2) 2a, 2b
2c Reel cover assembly T Fig. 2-4-6 (S2b),2(S2a),(W2) 2d
3a Tension arm assembly T Fig. 2-4-7 (W3a) 3b
3b Release guide assembly T Fig. 2-4-7 - 3a
3c Idler arm assembly T Fig. 2-4-7 (W3b) -
3d Guide arm assembly T Fig. 2-4-7 - 3a
3e Pinch roller arm assembly T Fig. 2-4-7 (W3a) -
4a Cleaner arm assembly T Fig. 2-4-8 (L4a) 4a
4b Slant pole arm assembly T Fig. 2-4-8 (W4),(L4b),(P4a),(P4b) 4b
4c Drum assembly T Fig. 2-4-8 3(S4) -
5a Guide roller (S) assembly T Fig. 2-4-9 (P5) 5a
5b Rail assembly T Fig. 2-4-9 3(W5a), (W5b) 5b, 5c

2-2
2.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY,
ASSEMBLY AND ADJUSTMENT
2.2.1 Tools required for adjustments
1. Torque Driver
Be sure to use to fastening the mechanism and exterior
parts because those parts must strictly be controlled for
tightening torque.
2. Bit
This bit is slightly longer than those set in conventional
torque drivers.
3. Tweezers
To be used for removing and installing parts and wires.
4. Chip IC replacement Jig
To be used for adjustment of the camera system.
5. Guide Driver
To be used to turn the guide roller to adjustment of the
linarity of playback envelope.
6. Adjustment Driver
To be used for adjustment.
7. Slit washer Installation Jig
To be used to install slit washers.
8. Jig connector cable
Connected to CN105 of the main board and used for
electrical adjustment, etc.
9. Extension connector
Connect this extension connector to the connector of the
jig connector cable for extending the cable connector.
Note:
For supplying the power through the coupler by
removing the cover (for jig), use this extension con-
nector double for connecting the jig connector ca-
ble.
10. Communication cable
Connect the Communication cable between the PC ca-
ble and Jig connector cable when performing a PC ad-
justment.
11. PC cable
To be used to connect the VideoMovie and a personal
computer with each other when a personal computer is
used for adjustment.
12. Service Support System
To be used for adjustment with a personal computer.
13. Alignment Tape
To be used for check and adjustment of interchange-
ability of the mechanism.
14. Cleaning Cloth
Recommended cleaning cloth to wipe down the video
heads, mechanism (tape transport system), optical lens
surface.
Torque Driver
YTU94088
1
Bit
YTU94088-003
2
3
Chip IC Replacement Jig
PTS40844-2
4
Guide Driver
YTU94148A
5
Adjustment Driver
YTU94028
6
7
Slit Washer Installation Jig
YTU94121B
8
Jig Connector cable
YTU93091B
910
Communication cable
YTU93107A
Extension Connector
YTU94145A
11
PC cable
QAM0099-002
12
Alignment Tape
MC-1
13
Service Support System
YTU94057-53
14
Cleaning Cloth
KSMM-01
Tweezers
P-895
Table 2-2-1

2-3
2.3 DISASSEMBLY/ASSEMBLY OF MECHANISM
ASSEMBLY
2.3.1 General statement
The mechanism should generally be disassembled/assem-
bled in the EJECT mode (ASSEMBLY mode). (Refer to Fig.
2-3-1.)
However, when the mechanism is removed from the main
body, it is set in the STOP mode. Therefore, after the
mechanism is removed from the main body, supply 3 V DC
to the electrode on the top of the loading motor to enter
the mechanism mode into the EJECT mode compulsory.
<Mechanism assembly/Cassette housing assembly>
<Back side of the mechanism assembly>
Fig. 2-3-1
Fig. 2-3-3
Fig. 2-3-4
Fig. 2-3-5
Fig. 2-3-6
Fig. 2-3-7
Motor
DC3V
EJECT mode Back side of deck
<C IN mode>
<EJECT mode>
<STOP mode>
<SHORT FF mode>
<PLAY mode>
<REV mode>
<SUB CAM GEAR>
TOP VIEW BOTTOM VIEW
Fig. 2-3-8
2.3.2 Explanation of mechanism mode
The mechanism mode of this model is classified into six
modes as shown in Table 2-3-1. Each mechanism mode
can be distinguished from others by the relative position
of “”mark on the sub cam gear to the inner or outer pro-
trusion on the main deck.
Refer to Fig. 2-3-2 to 2-3-8 below.
The EJECT mode, C IN mode and SHORT FF mode should
be recognized by the relative position of the “”mark to
the inner protrusion, while the STOP mode, REV mode and
PLAY mode should be recognized by that to the outer pro-
trusion.
Fig. 2-3-2