SERVICE MANUAL
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Digital Media Division,Tokai
DVD VIDEO CAMERA/RECORDER
2005
February
TK
No. 0502E
DZ-GX20A
DZ-MV780A
DZ-MV730A
DO NOT RESELL OR DIVERT IMPROPERLY
DZ-GX20A
DZ-MV780A
DZ-MV730A
During the Product Warranty period, please contact
1-800-HITACHI (800-448-2244) for guidance.
Version 0502E.2
Change 1: 5/20/05 List of Jigs and Tools Changed (page 6-2)
Change 2: 1/15/07 Added Part Numbers to Exploded Views (page 7-1), (page 7-2), (page 7-3)
Table of Contents
1 Safety Precaution for Repair ............. 1-1
1-1 Cautions ................................................... 1-1
1-2 Electrostatic Protection Measures ............ 1-2
1-3 Cautions When Handling DVD Drive ......... 1-2
1-4 Lead-Free Solder ...................................... 1-3
1-5 Notes When Using Service Manual .......... 1-5
2 General Description ........................... 2-1
2-1 Overview .................................................. 2-1
2-1-1 Servicing method ................................... 2-1
2-2 Features ................................................... 2-2
2-3 Specifications ........................................... 2-2
2-4 Major Differences from
Previous Models ....................................... 2-5
2-5 Compatibility of Recorded Discs ............... 2-8
2-6 Names of Parts ......................................... 2-9
2-7 List of Abbreviations and Terms for
DVD Video Camera/Recorders ................. 2-11
3 Description of Operation ................... 3-1
3-1 Description of Structure ............................ 3-1
3-2 Description of Newly Adopted
Technology ............................................... 3-3
4 Troubleshooting .................................. 4-1
4-1 Procedure for Troubleshooting .................. 4-1
4-2 Problem Guide .......................................... 4-2
4-3 Messages and Troubleshooting ................ 4-8
4-4 Display of Error Codes and
Troubleshooting ........................................ 4-18
4-4-1 Displaying error codes and
clearing them ......................................... 4-18
4-4-2 Details of error codes display ................ 4-19
4-4-3 Major error codes and
troubleshooting ...................................... 4-19
4-4-4 Cleaning disc and optical pickup ............ 4-22
4-5 Checking Versions of Firmware and
Updating ................................................... 4-23
4-5-1 Checking firmware versions .................. 4-24
4-5-2 Updating firmware ................................. 4-25
4-6 Trouble Diagnosis ..................................... 4-27
4-6-1 Trouble diagnosis flowchart ................... 4-27
4-6-2 Reassembly to enable
service position ..................................... 4-39
4-7 Procedure for Removing Disc from
Faulty DVD Video Camera/Recorder ........ 4-43
4-7-1 Item to be checked ................................ 4-43
4-7-2 How to remove disc ............................... 4-43
4-8 System Resetting/Resetting
Camera Functions .................................... 4-44
4-8-1 List of items to be reset ......................... 4-44
4-8-2 System reset procedure ........................ 4-46
4-8-3 Procedure for resetting
camera functions ................................... 4-47
4-9 Special Functions ..................................... 4-48
4-9-1 Forced initialization of DVD-RAM ........... 4-48
4-9-2 EEPROM data backup and write ........... 4-49
5 Disassembly and Reassembly .......... 5-1
5-1 Items to Be Checked ................................ 5-1
5-2 Order of Disassembly ............................... 5-1
5-3 Disassembly ............................................. 5-3
(1) Lens Hood
[DZ-GX20A/MV780A/MV730A] .............. 5-3
(2) Top Cover
[DZ-GX20A/MV780A/MV730A] .............. 5-3
(3) Cushion F and Cushion R [DZ-GX20A/
MV780A/MV730A] ................................. 5-4
(4) Lens Cover [DZ-GX20A/MV730A] ......... 5-4
(5) L Block [DZ-GX20A/MV730A] ................ 5-5
(6) L Block [DZ-MV780A] ............................ 5-6
(7) Front Block [DZ-GX20A/MV730A] ......... 5-7
(8) Lens Cover and Front Case
[DZ-MV780A] ......................................... 5-8
(9) AEL Circuit Board
[DZ-GX20A/MV780A/MV730A] .............. 5-9
(10) MAN Circuit Board and Rear Block
[DZ-GX20A/MV780A/MV730A] .............. 5-10
(11) Rear Case and EVF Unit
[DZ-GX20A/MV780A/MV730A] .............. 5-11
(12) Hand Strap
[DZ-GX20A/MV780A/MV730A] .............. 5-11
(13) L Cover
[DZ-GX20A/MV780A/MV730A] .............. 5-11
(14) Accessory Shoe and SHE-H Circuit
Board [DZ-GX20A/MV730A] .................. 5-12
(15) Camera Block [DZ-GX20A/MV730A] ..... 5-13
(16) Camera Block [DZ-MV780A] ................. 5-13
(17) Flash Unit [DZ-GX20A] .......................... 5-14
i
(18) Accessory Shoe and SHE-M Circuit
Board [DZ-MV780A] .............................. 5-15
(19) Rear Cover
[DZ-GX20A/MV780A/MV730A] .............. 5-15
(20) R Case, Frame, Disc Drive Unit and
DRF-H/DRF-L/DRF-M Circuit Board
[DZ-GX20A/MV780A/MV730A] .............. 5-16
(21) Lock Unit
[DZ-GX20A/MV780A/MV730A] .............. 5-17
(22) Adjustment Cover , L Case, and LCD Unit
[DZ-GX20A/MV780A/MV730A] .............. 5-17
(23) LCD Case U and Fulcrum Unit
[DZ-GX20A/MV780A/MV730A] .............. 5-18
(24) LCD Case B
[DZ-GX20A/MV780A/MV730A] .............. 5-19
(25) AVJ-H/AVJ-L/AVJ-M Circuit Board
[DZ-GX20A/MV780A/MV730A] .............. 5-20
(26) FRT-H/FRT-L/FRT-M Circuit Board
[DZ-GX20A/MV780A/MV730A] .............. 5-20
(27) Microphone and Front Case
[DZ-GX20A/MV780A/MV730A] .............. 5-21
(28) GSL-H Circuit Board, CCD Image Sensor,
Lens Unit, Cushion, Crystal Filter and Lens
Frame [DZ-GX20A] ............................... 5-22
(29) Lens Frame, Lens Unit, Cushion and Crystal
Filter [DZ-MV780A] ............................... 5-23
(30) CCD Image Sensor and GSL-M Circuit
Board [DZ-MV780A] .............................. 5-23
(31) Lens Frame and Lens Unit
[DZ-MV730A] ......................................... 5-24
(32) CCD Image Sensor and GSL-L Circuit
Board [DZ-MV730A] .............................. 5-24
6 Adjustment .......................................... 6-1
6-1 Creating Reference Data .......................... 6-1
6-1-1 List of Jigs and Tools used when Creating
Reference Data ..................................... 6-2
6-1-2 Power Supply and Materials for Creating
Reference Data ..................................... 6-3
6-1-3 Connections when Creating
Reference Data ..................................... 6-3
6-1-4 Settings when Creating
Reference Data ..................................... 6-5
6-1-5 Copying or Deleting Adjustment
Program ................................................ 6-6
6-1-6 Starting and Terminating Reference
Data Creation Program .......................... 6-6
6-1-7 Creating Reference Data ....................... 6-10
6-2 Setups for Adjustment .............................. 6-12
6-2-1 Checking Reference Data ...................... 6-12
6-2-2 List of Jigs and Tools for Adjustment ...... 6-13
6-2-3 Test Equipment, Power Supply and
Charts for Adjustment ............................ 6-13
6-2-4 Connections for Adjustment ................... 6-13
6-2-5 Settings for Adjustment .......................... 6-15
6-2-6 Starting and Terminating Adjustment
Program ................................................ 6-17
6-3 List of Adjustment Items ........................... 6-20
6-3-1 Adjustment Program
Hierarchy Diagram ................................. 6-20
6-3-2 List of Adjustments Needed After
Replacing Major Components ............... 6-21
6-3-3 Purpose of Adjustments and
Incompleted Phenomenon ..................... 6-23
6-4 Adjustment Procedure .............................. 6-24
6-4-1 Initial Data Write .................................... 6-24
6-4-2 Video Level ............................................ 6-25
6-4-3 Burst Level ............................................ 6-26
6-4-4 Autofocus .............................................. 6-27
6-4-5 Auto Iris Control ..................................... 6-28
6-4-6 Sampling Pulse ..................................... 6-29
6-4-7 Linearity ................................................. 6-30
6-4-8 Matrix .................................................... 6-31
6-4-9 Chroma Gain ......................................... 6-32
6-4-10 Spot Noise ............................................ 6-34
6-4-11 LCD ...................................................... 6-35
7 Exploded View .................................... 7-1
7-1 Exploded Views ........................................ 7-1
7-1-1 DZ-GX20A/MV730A Main ..................... 7-1
7-1-2 DZ-GX20A Camera ............................... 7-2
7-1-3 DZ-MV730A Camera ............................. 7-3
7-1-4 DZ-MV780A .......................................... 7-3
ii
S Schematic & Wiring Diagrams .......... S-1
S-1 DZ-GX20A/MV730A Wiring Diagram ..... S-1
S-2 DZ-MV780A Wiring Diagram ................. S-2
S-3 GSL-H ................................................... S-3
S-4 GSL-M ................................................... S-4
S-5 GSL-L .................................................... S-5
S-6 FRT-H/FRT-M/FRT-L .............................. S-6
S-7 AVJ-H/AVJ-M/AVJ-L .............................. S-6
S-8 SHE-H ................................................... S-7
S-9 SHE-M ................................................... S-7
S-10 DRF-H/DRF-M/DRF-L ........................... S-8
S-11 AEL ....................................................... S-9
S-12 CAMERA DSP [MAN] ............................ S-10
S-13 CODEC [MAN] ...................................... S-11
S-14 REG [MAN] ........................................... S-12
S-15 PLUG [MAN] .......................................... S-13
S-16 LENS DRIVE [MAN] .............................. S-14
S-17 IC BLOCK-1/2 ....................................... S-15
S-18 IC BLOCK-2/2 ....................................... S-16
iii
C Circuit Board Diagrams ..................... C-1
C-1 GSL-H ................................................... C-1
C-2 GSL-M ................................................... C-1
C-3 GSL-L .................................................... C-1
C-4 FRT-H/FRT-M/FRT-L .............................. C-2
C-5 AVJ-H/AVJ-M/AVJ-L .............................. C-2
C-6 DRF-H/DRF-M/DRF-L ........................... C-2
C-7 SHE-H ................................................... C-3
C-8 SHE-M ................................................... C-3
C-9 AEL [Pattern No. JA2296-7] ................... C-4
C-10 AEL [Pattern No. JA2296-8] ................... C-5
C-11 MAN ...................................................... C-6
Information:
The two types of AEL circuit board are shown,
since the circuit board is changed during mass-
production.
Check the pattern no. printed on the circuit
board when repairing.
B Block Diagrams .................................. B-1
B-1 Video/Audio Signal Process .................. B-1
B-2 Power-1 ................................................. B-2
B-3 Power-2 ................................................. B-3
P Parts List ............................................. P-1
1 - 1
Safety Precaution for Repair
1
1-1 Cautions
Many electrical and mechanical parts have special safety-related characteristics. These are often not
evident from visual inspection nor can the protection afforded by them necessarily be obtained by using
replacement components rated for a higher voltage, wattage, etc. Replacement parts which have these
special safety characteristics are identified in this Service Manual. Electrical components having such
features are identified by marking with a
on the schematics and the parts list in this Service Manual.
The use of a substitute replacement component which does not have the same safety characteristics as
the HITACHI recommended replacement one, shown in the parts list in this Service Manual, may create
shock, fire, or other hazards. Product safety is continuously under review and new instructions are issued
from time to time. For the latest information, always consult the current HITACHI Service Manual. A
subscription to, or additional copies for, HITACHI Service Manual may be obtained at a nominal charge
from HITACHI SALES CORPORATION.
PRODUCT SAFETY NOTICE
CAUTION
There is a high-voltage section inside the DVD video
camera/recorder: When repairing or inspecting it, take
great care to prevent electric shock: Use an isolating
transformer, wear gloves, etc.
CLASS 1
LASER PRODUCT
CAUTION
This product contains a laser diode of
higher class than 1. To ensure contin-
ued safety, do not remove any covers
or attempt to gain access to the in-
side of the product. Refer all servicing
to qualified personnel.
Lithium battery; danger of explosion if battery is incorrectly replaced. Replace only with the same or
equivalent type recommended by the equipment manufacturer. Discard used batteries according to
manufacturer's instructions.
When replacing the lithium battery it is important to use the same type and connect it correctly.
WARNING:
Lithium batteries contain dangerous chemicals.
Handle and dispose of with great care.
Do not throw in a fire.
Do not short circuit it.
For disposal place in a plastic bag and put in waste bin.
CAUTION