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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)315-5000
(973)396-1000
(630)851-7855
(714)229-8011
(770)339-2582
(808)833-5828
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
(416)293-1311
(514)871-1311
(604)270-1311
Printed in Japan
S40895-03
COMPACT VHS CAMCORDER
GR-AXM230U/SXM330U/SXM930U
No. 86595
November 2000
This service manual is printed on 100% recycled paper.
COPYRIGHT
© 2000 VICTOR COMPANY OF JAPAN, LTD.
SPECIFICATIONS (The specifications shown pertain specifically to the model GR-SXM930)
GR-AXM230U/SXM330U/SXM930U
No.
86595
Audio
: 300 mV (rms), 1 k
analog
output
(via Audio output connector)
Digital
: ø2.5 mm, 4-pole, mini-head
jack
S-Video
: Y :1 V (p-p), 75
,
analog output
C : 0.29 V (p-p), 75
,
analog output
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
: 59 mm x 31 mm x
(W x H x D)
69 mm (2-3/8" x 1-1/4" x
2-3/4")
Weight
: Approx. 130 g (0.29 lbs)
Optional Accessories
·Battery Packs BN-V12U, BN-V20U, BN-V400U
·A/V (Audio/Video) Cable
·S-Video Cable QAM0004-004
·Compact S-VHS (
) Cassettes ST-C-40/30/20
·Compact VHS (
) Cassettes TC-40/30/20
·Active Carrying Bag CB-V7U
Camcorder
General
Format
: S-VHS/VHS NTSC standard
Power source
: DC 11 V
(Using AC Adapter)
DC 6 V
(Using battery pack)
Power consumption
Viewfinder on
: 4.7 W
LCD monitor on
: 5.4 W
Video light
: 3.0 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)
D.S.C. format
Recording format : Digital data storage
(based on JPEG)
Recording medium : Built-in flash memory,
2 Mbyte
Number of storable shots
FINE mode
: approx. 30 shots
STANDARD mode: approx. 60 shots
Image size
: 640 x 480 pixels
(when captured on a PC)
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. 930 g (2.1 lbs)
Dimensions
: 206 mm x 112 mm x 118 mm
(8-1/8" x 4-7/16" x 4-11/16")
(with the LCD monitor closed
and with the viewfinder fully
tilted downward)
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
0.55" color LCD
White balance
adjustment
: Auto/Manual adjustment
LCD monitor
: 3" diagonally measured, LCD
panel/TFT active matrix
system
Speaker
: Monaural
Connectors
Video
:1 V (p-p), 75
unbalanced,
analog output
(via Video output connector)
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.


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TABLE OF CONTENTS
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 .................................................... 1-3
1.4
DISASSEMBLY/ASSEMBLY OF CAMERA SECTION
AND DECK SECTION .......................................................... 1-9
1.4.1
Flowchart of disassembly ............................................. 1-9
1.4.2
Disassembly method .................................................... 1-9
1.5
REPLACEMENT OF CCD IMAGE SENSOR ..................... 1-12
1.5.1
Removal of CCD image sensor .................................. 1-12
1.5.2
Installation of new CCD image sensor ....................... 1-12
1.5.3
Replacement of CCD board assy ............................... 1-12
1.6
TAKE OUT CASSETTE TAPE ............................................ 1-13
1.7
EMERGENCY DISPLAY ..................................................... 1-14
1.8
DEMONSTRATION MODE ................................................ 1-14
1.9
SERVICE NOTE ................................................................. 1-16
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/CTL 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
MONITOR ADJUSTMENT .................................................... 3-3
3.2.1
V COM .......................................................................... 3-3
3.3
ELECTRONIC VIEWFINDER (E. VF) ADJUSTMENT ......... 3-4
3.3.1
Tilt ................................................................................. 3-4
3.3.2
Centering ...................................................................... 3-4
3.3.3
Vertical scanning .......................................................... 3-4
3.3.4
Brightness .................................................................... 3-4
3.3.5
Focus ............................................................................ 3-4
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
VTR ASP SCHEMATIC DIAGRAM ....................................... 4-7
4.4
MECHA MDA SCHEMATIC DIAGRAM ................................ 4-9
4.5
VTR DSP SCHEMATIC DIAGRAM .................................... 4-11
4.6
DSP SCHEMATIC DIAGRAM ............................................. 4-13
4.7
IRIS & AF/ZOOM SCHEMATIC DIAGRAM ........................ 4-15
4.8
VIDEO OUT SCHEMATIC DIAGRAM ................................ 4-17
4.9
REGULATOR SCHEMATIC DIAGRAM .............................. 4-19
4.10 LCD CTL SCHEMATIC DIAGRAM
(FOR AXM230/SXM330) ................................................... 4-21
4.11 LCD CTL SCHEMATIC DIAGRAM (FOR SXM930) ........... 4-23
4.12 JACK AND CCD SCHEMATIC DIAGRAMS ....................... 4-25
4.13 SPEAKER AND MONITOR SCHEMATIC DIAGRAMS ...... 4-27
4.14 C-VF BL SENSOR SCHEMATIC DIAGRAM ...................... 4-29
4.15 DSC SCHEMATIC DIAGRAM ............................................ 4-31
4.16 TOP OPE UNIT, ZOOM UNIT, REAR UNIT
AND SENSOR SCHEMATIC DIAGRAMS ........................... 4-33
4.17 ELECTRONIC VIEWFINDER SCHEMATIC DIAGRAM ......... 4-35
4.18 MAIN CIRCUIT BOARD ..................................................... 4-37
4.19 CCD AND C-VF BL CIRCUIT BOARDS ............................. 4-43
4.20 MONITOR CIRCUIT BOARD ............................................. 4-45
4.21 DSC CIRCUIT BOARD ....................................................... 4-47
4.22 ELECTRONIC VIEWFINDER CIRCUIT BOARD ............... 4-49
4.23 POWER SYSTEM BLOCK DIAGRAM ............................... 4-51
4.24 CPU/MDA SYSTEM BLOCK DIAGRAM ............................ 4-53
4.25 CAMERA SYSTEM BLOCK DIAGRAM .............................. 4-55
4.26 Y/C SYSTEM BLOCK DIAGRAM ....................................... 4-59
4.27 MONITOR SYSTEM BLOCK DIAGRAM ............................ 4-61
4.28 WAVEFORMS .................................................................... 4-63
4.29 VOLTAGE CHARTS ........................................................... 4-64
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>
(SXM930U/UC) ..................................................................... 5-8
5.4
ELECTRONIC VIEWFINDER ASSEMBLY <M4>
(AXM230U/UC/SXM330U/UC) ............................................. 5-9
5.5
MONITOR ASSEMBLY <M5> ............................................. 5-10
5.6
ELECTRICAL PARTS LIST ................................................ 5-11
MAIN BOARD ASSEMBLY <01> ........................................ 5-11
CCD BOARD ASSEMBLY <02> ......................................... 5-18
C-VF BL BOARD ASSEMBLY <06> E,F ............................ 5-19
MONITOR BOARD ASSEMBLY <07> ................................ 5-19
DSC BOARD ASSEMBLY <08> E,F ................................... 5-19
E. VF BOARD ASSEMBLY <50> ........................................ 5-20
Section
Title
Page
GR-AXM230U
GR-SXM330U
GR-SXM930U
VIEW FINDER
B/W
B/W
COLOR
LCD MONITOR
2.5*
2.5*
3.0*
BODY COLOR
MOLD BLACK
METALLIC GRAY
SILVER
DIGITAL STILL CAMERA
NOT USED
NOT USED
USED
SHUTTER SOUND
NOT USED
NOT USED
USED
SNAP SHOT
NOT USED
USED (FULL ONLY)
USED (FULL & PIN-UP)
NIGHT ALIVE
NOT USED
USED
USED
5SEC REC SW
USED
NOT USED
NOT USED
S-VHS SW
NOT USED
USED
USED
S OUTPUT
NOT USED
USED
USED
PC TERMINAL
NOT USED
NOT USED
USED
RCU UNIT
NOT USED
RM-V715U
RM-V715U
PC CONNECTION CABLE
NOT USED
NOT USED
PROVIDE
CD-ROM
NOT USED
NOT USED
PROVIDE
The following table lists the differing points between Models GR-AXM230U/UC, GR-SXM330U/UC and GR-SXM930U/UC in this series.


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1-1
(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, 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
(5) Adjustment information for installation.
1
CASSETTE
C1
2(S1)
COVER ASSEMBLY
2
UPPER CASE
C2
2(S2), (L2)
LOWER CASE
C3
9(S3), (L3a), (L3b)
3
ASSEMBLY(INCL.
*CN 3a 3b
E. VF. ASSEMBLY)
CAP (RCA jack)
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
STEP
/LOC
PART
NO.
REMOVAL
(For Cabinet Parts)
Fig.
No.
1.1.3
Connection of the wires
1. Pull the connector structure upward to release the clamp
when removing or inserting the flat wire cable.
Fig. 1-1-1
Connector
Wire
Connector
Wire
Fig. 1-1-2
NOTE:
After removing the wire, return the stopper to
its original position, because it is apt to come
off if it is left open.
*UNLOCK/RELEASE/
UNPLUG/UNCLAMP/
UNSOLDER
(1)
(2)
(3)
(4)
L
L
L
L


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1-2
1
2
INF adjustment lens
YTU92001B
Torque driver
YTU94088
3
4
Bit
YTU94088-003
5
6
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 software
YTU94057-51
Cleaning cloth
KSMM-01
15
16
PC cable
QAM0099-002
Jig connector cable
YTU93106A
1.2 TOOLS REQUIRED FOR ADJUSTMENTS
Table 1-2-1
1,2. Alignment tape
To be used for check and adjustment of interchangeability
of the mechanism.
(Video: Color bar signal, Audio: Non-signal)
3. Torque driver
Be sure to use to fastening the mechanism and exterior
parts because those parts must strictly be controlled 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
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.
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. Service support system software
To be used for adjustment with a personal computer.
15. PC cable
To be used to connect the VideoMovie and a personal
computer with each other when a personal computer is
used for adjustment.
16. Cleaning cloth
Recommended cleaning cloth to wipe down the video
heads, mechanism (tape transport system), optical lens
surface.


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1-3
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.
M
M
M
M
M
M
M
M
M
M
M
1
Cassette cover assembly
2
Upper case
3
Lower case assembly
(Incl. E. VF assembly)
4
E. VF assembly
5
Top operation unit assembly
6
Rear unit
7
Front cover assembly
(Incl. Microphone,
DC light assembly)
8
Microphone
9
DC light assembly
0
Monitor assembly
-
Front frame assembly
3a
2
SPEAKER
MAIN CN27
3b
20
C-VF BL CN7551
MAIN CN11
5
E. VF (B/W)
MAIN CN12
5a
12
TOP OPERATION UNIT
MAIN CN18
6a
13
REAR UNIT
MAIN CN28
7a
2
MIC
MAIN CN8
8a
33
MONITOR ASSEMBLY
MAIN CN16
11a
28
MONITOR CN7501
T. HINGE
11b
24
MONITOR CN7502
LCD MODULE
11c
2
MONITOR CN7503
BACK LIGHT
1.3.2 Disassembly method
List of Abbreviations:
2(S1)=2 screws (S1)
4(L1a)=4 Locking Tabs
CN=Connector
1
CASSETTE
C1
2(S1)
COVER ASSEMBLY
2
UPPER CASE
C2
2(S2), (L2)
3
LOWER CASE
C3
9(S3), (L3a), (L3b)
ASSEMBLY (INCL.
*CN 3a 3b
E. VF ASSEMBLY)
CAP (RCA jack)
4
E. VF ASSEMBLY
C4
3(S4)
5
TOP OPERATION
C5
2(S5), (L5a), (L5b), (L5c)
UNIT ASSEMBLY
*CN 5a
6
REAR UNIT
C6
3(S6), (L6a), (L6b)
*CN 6a
7
FRONT COVER
C7
2(S7a), (S7b), (L7a), (L7b)
ASSEMBLY (INCL. MIC
*CN 7a
DC LIGHT ASSEMBLY)
8
MICROPHONE
(S7a)
9
DC LIGHT ASSEMBLY
2(L7c)
0
MONITOR ASSEMBLY
C8
2(S8a), (S8b)
*CN 8a
C9
2(S9a), (S9b), (S9c)
C10
2(S10a), 2(S10b), 2(S10c),
(L10a), (L10b), (L10c)
C11
(L11a), (L11b), (L11c)
*CN 11a , 11b , 11c
C12
2(S12a), (S12b), 2(L12a)
-
FRONT FRAME
C13
2(S13)
ASSEMBLY
STEP
/LOC
PART
NO.
REMOVAL
Fig.
No.
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- No. of
nector Pins
Connector
*UNLOCK/RELEASE/
UNPLUG/UNCLAMP/
UNSOLDER