Sony DNW-A100 User manual

DIGITAL VIDEO HYBRID RECORDER
DNW-A100/A100P
DNW-A50/A50P
DNW-A45/A45P
MAINTENANCE MANUAL Part 1
1st Edition
ANALOG COMPOSITE DECODER BOARD
BKDW-505/506
SDDI INPUT KIT
BKNW-103
ANALOG COMPONENT INPUT BOARD
BKNW-104
AES/EBU I/F KIT
BKNW-105

!WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so.Refer all servicing to
qualified service personnel.
!WARNUNG
Die Anleitung ist nur für qualifiziertes Fachpersonal bestimmt.
Alle Wartungsarbeiten dürfen nur von qualifiziertem Fachpersonal ausgeführt werden.Um die
Gefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei
Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen. Andere als die angegeben
Wartungsarbeiten dürfen nur von Personen ausgeführt werden, die eine spezielle Befähigung
dazu besitzen.
!AVERTISSEMENT
Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin
de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les
réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres.
Pour toute réparation faire appel à une personne compétente uniquement.
DNW-A100 Serial No. 10111 and Higher
DNW-A100P (UC) Serial No. 10001 and Higher
DNW-A100P (CE) Serial No. 10001 and Higher
DNW-A50 Serial No. 10001 and Higher
DNW-A50P (UC) Serial No. 10001 and Higher
DNW-A50P (CE) Serial No. 10001 and Higher
DNW-A45 Serial No. 10001 and Higher
DNW-A45P (UC) Serial No.10001 and Higher
DNW-A45P (CE) Serial No. 10001 and Higher
BKDW-505 Serial No. 10001 and Higher
BKDW-506 (UC) Serial No. 10001 and Higher
BKDW-506 (CE) Serial No. 10001 and Higher
BKNW-103 Serial No.10001 and Higher
BKNW-104 Serial No.10001 and Higher
BKNW-105 Serial No.10001 and Higher

1 (P)
Attention-when the product is installed in Rack:
1. Prevention against overloading of branch circuit
When this product is installed in a rack and is
supplied power from an outlet on the rack, please
make sure that the rack does not overload the supply
circuit.
2. Providing protective earth
When this product is installed in a rack and is
supplied power from an outlet on the rack, please
confirm that the outlet is provided with a suitable
protective earth connection.
3. Internal air ambient temperature of the rack
When this product is installed in a rack, please make
sure that the internal air ambient temperature of the
rack is within the specified limit of this product.
4. Prevention against achieving hazardous
condition due to uneven mechanical loading
When this product is installed in a rack, please make
sure that the rack does not achieve hazardous
condition due to uneven mechanical loading.

1
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Table of Contents
Manual Structure
Purpose of this manual .............................................................................................. 5
Contents ..................................................................................................................... 5
Related manuals......................................................................................................... 6
Caution for Handing the Unit with Built-in HDD (for part 1)............................ 7
1. Installation
1-1. Installation Procedure..................................................................................1-1
1-2. Supplied Accessories ..................................................................................1-1
1-3. Operating Conditions ..................................................................................1-2
1-4. Power Supply ..............................................................................................1-2
1-4-1. Voltage and Power Requirements ..............................................1-2
1-4-2. Power Cord.................................................................................1-2
1-5. Installation Space ........................................................................................1-3
1-6. Rack Mounting............................................................................................1-4
1-7. Connecting Connector/Cable ......................................................................1-9
1-8. Signal Inputs and Outputs .........................................................................1-10
1-9. Switch Settings on Connector Panel .........................................................1-13
1-10. Switch and Shorting Plug Setting on PC Boards ......................................1-14
1-10-1. APR-12 Board ..........................................................................1-14
1-10-2. APR-13 Board ..........................................................................1-16
1-10-3. DM-89 Board ...........................................................................1-18
1-10-4. TBC-23 Board ..........................................................................1-19
1-10-5. SS-63 Board .............................................................................1-20
1-10-6. SSX-1 Board ............................................................................1-22
1-11. Mode Switching of Search Dial ................................................................1-23
1-12. Setup Menu Items .....................................................................................1-24
1-13. Reference System......................................................................................1-26
1-14. 525/625 Switchable Function....................................................................1-27
1-15. Settings and Adjustment when Peripheral Equipment is Connected ........1-28
1-15-1. Time Code Setting....................................................................1-28
1-15-2. System Phase Alignment..........................................................1-29
1-15-3. Setup Menu Setting ..................................................................1-29
1-15-4. Settings when Extended Hard Disk is Connected
(Will be available as a supplement.)
1-16. Installation of BKDW-505/506.................................................................1-31
1-16-1. Procedure..................................................................................1-31
1-16-2. Check after Installing ...............................................................1-32
1-17. Installation of BKNW-103
(Will be available as a supplement.)
http://getMANUAL.com

2DNW-A100/A50/A45
DNW-A100P/A50P/A45P
1-18. Installation of BKNW-104 ........................................................................1-38
1-18-1. Procedure..................................................................................1-38
1-18-2. Adjustment after Installing .......................................................1-39
1-19. Installation of BKNW-105
(Will be available as a supplement.)
2. Service Overview
2-1. Notes on Power Supply Block ....................................................................2-1
2-1-1. Warning on Primary Circuit Block and Electric Shock .............2-1
2-1-2. Note on Resetting the Circuit Breaker .......................................2-1
2-2. Cleaning when the Heads are Clogged .......................................................2-1
2-3. Removal/Installation of Cabinet .................................................................2-2
2-3-1. Upper Lid, Side Panels, and Bottom Plate
Removal/Installation ..................................................................2-2
2-3-2. Control Panels Removal/Installation..........................................2-3
2-3-3. Connector Panel Assembly Removal/Installation ......................2-4
2-3-4. Power Supply Panel Assembly Removal/Installation ................2-5
2-4. Plate MD Assembly Removal/Installation ..................................................2-5
2-5. Cassette Compartment Removal/Installation ..............................................2-6
2-6. Lower Control Panel Assembly Removal/Installation................................2-7
2-7. Circuit Function ..........................................................................................2-8
2-8. Location of Main Part ...............................................................................2-10
2-8-1. Printed Circuit Boards, Power Supply Unit,
and HDD Units Location .........................................................2-10
2-8-2. Main Mechanical Parts Location .............................................2-13
2-9. Function and Location of Sensors .............................................................2-14
2-10. System of Cassette ....................................................................................2-16
2-11. Information of LEDs on Circuit Boards....................................................2-18
2-12. How to Take Out the Cassette when the Tape is Slacking .......................2-22
2-13. Pulling Out/Insertion of Plug-in Board .....................................................2-23
2-14. Fixtures and Adjustment Equipment List .................................................2-24
2-14-1. Fixtures.....................................................................................2-24
2-14-2. Equipment for Adjustment .......................................................2-26
3. Error Message
3-1. Error Message .............................................................................................3-1
4. Maintenance Mode
(Will be available as a supplement.)

3
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
5. Periodic Maintenance and Inspection
5-1. Periodic Maintenance..................................................................................5-1
5-1-1. Index...........................................................................................5-1
5-1-2. Periodic Replacement and Check Item List ...............................5-2
5-1-3. Hours Meter ...............................................................................5-3
5-2. Cleaning ......................................................................................................5-4
5-2-1. Cleaning by Cleaning Tape ........................................................5-4
5-2-2. General Information for Cleaning by Cleaning Cloth................5-4
5-2-3. Tape Running Surface of Upper Drum and
Video Heads Cleaning................................................................5-6
5-2-4. Tape Running Surface of Lower Drum......................................5-7
5-2-5. Stationary Heads Cleaning .........................................................5-8
5-2-6. Tape Running System and Tape Cleaner Cleaning....................5-9
5-2-7. Fan Motors Cleaning................................................................5-10
5-2-8. Cassette Compartment/Cassette Supports Cleaning ................5-11
6. Replacement of Plug-in Boards
(Will be available as a supplement.)
7. Spare Parts
7-1. Notes on Repair Parts..................................................................................7-1
7-2. Exploded Views ..........................................................................................7-2
7-3. Plug-in Boards.............................................................................................7-4
7-4. Packing Materials and Supplied Accessories..............................................7-5
7-5. Fixtures List ................................................................................................7-6
Appendix A Outline of Format
A-1. Outline........................................................................................................ A-1
A-2. Recording Format....................................................................................... A-1
A-3. Head Configuration .................................................................................... A-5
A-4. Signal Processing ....................................................................................... A-6
A-4-1. Features of Signal Processing ................................................... A-6
A-4-2. Outline of Signal Processing..................................................... A-6
Appendix B Setting Check Sheet

4DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Appendix C Block Diagrams
INDEX................................................................................................................... C-1
OVERALL (1/2).................................................................................................... C-3
OVERALL (2/2).................................................................................................... C-4

5
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Purpose of this manual This manual is the Maintenance manual part1 of digital video hybrid recorder DNW
series. DNW series includes the following models .
DNW-A100/A100P
DNW-A50/A50P
DNW-A45/A45P
This manual is intended for use by trained system and service engineers, and
provides the information that is required to install, maintenance information, and the
information for service such as replacement of plug-in boards.
Moreover, provides the related information (how to install, etc.) for the following
optional board.
BKDW-505/506 Analog Composite Decoder Board
BKNW-103 SDDI Input Kit
BKNW-104 Analog Component Input Board
BKNW-105 AES/EBU I/F Kit
Contents This manual is organized by following sections.
Section 1 Installation
Explains the information that is required to install (environment, connection infor-
mation, initial setting, etc.), and when building optional board into this unit (installa-
tion, initial setting/adjustment, etc.) .
Section 2 Service Overview
Explains fundamental area of the information that is required to service , (removal of
cabinet and cassette compartment, the functions of printed circuit board, the loca-
tions of main part, fixture and measuring equipment information, notes, etc.) , the
measures against trouble and ISR (Interactive Status Reporting system).
Section 3 Error Message
Explains the error messages.
Section 4 Maintenance Mode
Explains each menu of the maintenance mode.
Section 5 Periodic Maintenance and Inspection
Explains the recommended periodic maintenance, and the cleaning procedure.
Section 6 Replacement of Plug-in Boards
Explains how to replace the plug-in board and how to adjust and check after replace-
ment.
Section 7 Spare Parts
Describes the spare parts list and the exploded view for the service parts of this unit,
and the packing materials and supplied accessories list.
Manual Structure

6DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Appendix A Outline of Format
Explains the Betacam SX format and the head configuration.
Appendix B Setting Check Sheet
The sheet is used for checking the setup conditions such as switch, setup menu under
the application.
Appendix C Block Diagrams
Describes the overall block diagram
Related manuals Besides this “Maintenance manual part 1”, the following manuals are available for
digital video hybrid recorder DNW series.
• Operation Manual Part 1 (Supplied with the DNW.)
This manual is necessary for application and operation (and installation) of the DNW.
• Maintenance Manual Part 2 (available on request )
This manual describes the information that premises the parts level service
(adjustments, board layouts, schematic diagrams, detailed parts list, etc.) for this
unit and optional board.
If this manual is required, please contact to Sony’s service organization.
• Protocol Manual of Remote (9-pin) Connector (available on request)
This manual explains the protocol for controlling the VTR via the RS-422A (9-pin
serial remote) .
If this manual is required, please contact to Sony’s service organization.

7
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
This unit has two built-in hard disk drives (HDDs). Pay careful attention to the following and perform
operations with care when installing, servicing, and maintaining this unit.
Never give any mechanical shock and vibration.
This may cause an HDD trouble or destroy the data in HDD.
.Pack this unit using specified packing materials when carrying the unit. Use a cart with less-vibration
when carrying this unit by a cart. If an excessive mechanical shock and vibration are applied, the HDD
may be damaged.
.Never move this unit under power on state. Take out or insert this unit from or into the rack under the
power off. Also never install or remove the cabinet under power on state.
.When putting the unit on the floor, put this unit on the floor gently with the specified feet attached to
the bottom of the unit. If there are no feet on the bottom, attach them before putting this unit, or put
this unit gently so that no sound is generated.
Never touch the unit for 30 seconds after the power is turned off.
The disks in HDD rotate by inertia for a while after the power is turned off. In this case, the heads are in
the most unstable state. This period is more sensitive to a mechanical shock and vibration than during
power on state. Never give even a slight shock for at least 30 seconds after the power is turned off.
Operations can be initiated (because the disks stop) after 30 seconds or more.
For failure occurring in HDD
If it seems that the HDD of this unit causes a trouble (a failure occurs in the HDD), treat this unit in the
same manner as described above. In so doing, protect the HDD from increace of the damage till confirm-
ing the contents of the failure ro analyzing the failure.
Caution for Handling the Unit with Built-in HDD (for Part 1)

1-1
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Section 1
Installation
1-2. Supplied Accessories
AC power cord set .............................................................1
Plug holder.........................................................................1
9 pins remote control cable (RCC-5G)..............................1
SCSI terminal connector....................................................1
Screws for rack mounting (PSW 4 x 16) ..........................4
Operation manual ..............................................................1
Maintenance manual (Part 1).............................................1
1-3. Operating Conditions 
1-4. Power Supply
1-5. Installation Space
1-6. Rack Mounting
1-16. Installation of BKDW-505/506
1-17. Installation of BKNW-103
1-18. Installation of BKNW-104
1-19. Installation of BKNW-105
1-7. Matching Connectors 
1-8. Signal Input and Output
1-9. Switch Setting on Connector Panel 
1-10. Switch and Short Plug Setting on Circuit Board
1-11. Mode Switching of Search Dial
1-12. Setup Menu Items 
1-13. Reference System
1-14. 525/625 Switchable Fanction
1-15. Settings and Adjustment when Peripheral Equipment is Connected
Start
Determination of 
installation place
Unpacking
Rack mounting
*Connection
*Initial setup
*Operation check
Installation of 
optional board
End
n
If an error message is shown on the time counter, refer to “3-1. Error Message”.
n
When the unit is transported, it is required to pack the unit into the specified new packing materials.
Do not reuse the packing materials.
1-1. Installation Procedure
c
Hard disk drives are embedded in this unit. Pay careful
attention when installing the unit.
Be careful not to give a shock and mechanical vibration to
it. This may cause a trouble.
Installation procedure of this unit is shown on the follow-
ing flowchart.
Refer to each section about detail of each flow.
The operation manual is also reqruired to do * - marked
flow.

1-2 DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Rush current: Power voltage 100 V IN; 10 A
Power voltage 240 V IN; 20 A
This unit’s power line has a switching regulator with the
power factor 98%.
The power consumption just described is includes the
power consumption of a optional board BKDW-505 or
BKDW-506.
n
AC power supply is repuired a capacity which is commen-
surate with rush current.
If the capacity of the AC power supply is not enough, the
breaker of AC power of a supply side may operate or this
unit may not operate normaly.
1-4-2. Power Cord
w
Use the specified power cord only when connecting.
Never use a injured power cord.
Power cord for the customer in the U.S.A. and Canada.
1Power cord set (approx. 2.4 m) 1-551-812-11
2Plug holder (Black) 2-990-242-01
Power cord for the customer in the U.K..
1Power cord set (approx. 2.5 m) 1-590-910-11
2Plug holder (Gray) 3-170-078-01
If the unit destined for Europe is used in the area except
the U.K., please consult with local Sony’s sale/service
office.
1-3. Operating Conditions
1-4. Power Supply
1-3. Operating Conditions
c
Good air circulaiton is essential to prevent internal heat
build-up. Place the unit in location with sufficient air
circulation.
Do not block the ventilation holes of the cabinet and the
front and rear panels.
Operating temperature : +5dC to +40dC
(When the inner of the unit becomes less than +5dC, the
hard disk portion does not start up because of entering
into heart up mode.
The inner of the unit becomes +5dC or more, the hard
disk portion start up automatically.)
Operating humidity : 25% to 80%
(Condensation not allowed)
Storage temperature : _20dC to +60dC
Locations to avoid :
.Areas where the unit will be exposed to direct sunlight
of any other strong lights.
.Areas near heat sources.
.Dusty areas or areas subject to vibration.
.Areas with strong magnetic field.
.Areas with much electrical noise.
.Areas with much static electricity.
.Areas that is impossible to find a specified room for
installation.
(Refer to “1-5. Installation Space” page 1-3)
Horizonal condition : Do not slant the front and rear of
the unit more than 30d.
c
Fix the unit securely to avoid slipping if the unit is not
operated at horizonal place.
1-4. Power Supply
1-4-1. Voltage and Power Requirements
w
Be sure to operate the unit within the range of
recommended power voltage.
Recommended power voltage: AC 100 to 240 V ±10%
Recommended power frequency:50 Hz or 60 Hz
Power consumption:DNW-A100/A100P; 320 W (320 VA)
DNW-A50/A50P; 300 W (300 VA)
DNW-A45/A45P; 300 W (300 VA)
12 AC inlet
(DNW)
Safety earth (Green/Yellow)
Live (Brown)
Neutral (Blue)
12
AC inlet
(DNW)

1-3
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
n
For the operation with the upper lid removed, the air
cooling effect using the fan decreases. Complete the work
in a short time as far as possible when the unit is operated
for inspection with the upper lid removed. Blow a wind
using an electric fan so as to suppress an increase in
temperature when the work is continued for a long time
with the power turned on.
1-5. Installation Space
nRemove the feet when rack mounting.
Dimensions when Rack-Mounting
Mass DNW-A100/A100P : 38 kg
DNW-A50/A50P : 38 kg
DNW-A45/A45P : 38 kg
577(Maximum traveling distance)
416(Rail-installed width)
427(Unit width)
Unit : mm
481
465
364
427 31.5
36.7
220
148.2
19
158
104
15.9 12.7
123.8 263.5
457.5
45447.1 18.3
107
(70.6)
1.2
415.9
218
512.8
(454)
(47.1)
45.5
520
1-5. Installation Space
Do not block ventilation (upper lid, right side panel, lower
portion of front panel, bottom plate) and exhaust part when
installing because this unit is air-cooled by four fans.
The work area must be secured in consideration of the
service operation. Especially, the rear side must be at least
40 cm away from the walls for ventilation.
When the unit is operated on a desk or similar condition,
assure that the clearance from the upper lid and the right
side panel is at least 4 cm.
However, it is recommended that the clearance above the
unit is more than 40 cm in consideration of the service
operation.
http://getMANUAL.com

1-4 DNW-A100/A50/A45
DNW-A100P/A50P/A45P
Rack Mounting Procedure
.Remove of feet
c
Move the unit as gently as possible to avoid shock to the
hard disk drive. Pay particular attention to move of this
unit without feet.
(1) Place the unit on its right side panel down.
n
Lend your hand so that the lower handle does not hang
down.
(2) Unscrew the four screws and remove the feet from the
bottom plate of the unit.
(3) Replace the unit to the horizonal position.
c
Keep these screws and the feet that are removed in this
procedure carefully.
Be sure to attach the feet if the unit is used after removing
from the rack.
If not, the hard disk drive may break down by mechanical
vibration, shock, etc.
Tighting torque: 9.8 N.cm {10 kgf.cm}
1-6. Rack Mounting
PS4 x14
PS4 x14
Foot
Foot
1-6. Rack Mounting
Explains how to mount this unit in a 19-inch standard rack.
Install this unit in a rack accurately as following procedure
using specified rack mount rail.
If not, there is a fear of unexpected accident such as a drop
of the unit or turnover of the rack.
Specified Rack Mount Kit
RMM-111 (Option) or
RMM-110 (Option)
c
Use the specified rack mount rail.
If not, injury could occur by drop of the unit because
strength of rail is not enough.
n
The color of rack angle of RMM-111 fits to the unit.
RMM-110 is the same consistance, strength and dimension
as RMM-111, but the color of rack angle is different.
Parts Packed in RMM-110/111
.Slide rail .......................................... 2
.Rack angle (handle)......................... 2
.Rail bracket ..................................... 4
.Plate nut (large) ............................... 4
.Plate nut (small) .............................. 4
.Screw (PSW4 x 16) ........................ 4
.Screw (B4 x 8)................................ 8
.Hexagon socket head cap screw...... 8
.Flat washer ...................................... 8
.Screw (RK5 x 14) ........................... 2
.Ornamental washer.......................... 2
.L-shaped hexagon wrench............... 1
Notes on Rack Mounting
.Adjust so that the temperature inside the rack is in the
range of the unit’s operating temperature.
.To prevent turning over the rack, fix the rack on the
horizonal and firm floor securly using the bolts.
.Never remove the upper lid, bottom plate, and so on
during rack mounting.
.Connect long enough cables on the connector panel,
considering that the unit is pulled out from the rack.
.When other unit with built-in hard disk drive is already
installed in the rack for mounting this unit, turn off the
power of the unit which is already installed before
mounting this unit in the rack.

1-5
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
.Attachment of rack angles (handles)
(8) Remove the four screws (B4 x 6) in the figure from
both sides (left and right) of the unit.
(9) Attach the two rack angles to both sides (left and right)
of the unit using the four screws (PSW 4 x 16)
attached to the rack mount kit.
Tighting torque: 1.2 N.m {12.2 kgf.cm}
n
Keep these screws (B4 x 6) that are removed in the
procedure (8) carefully.
Be sure to use these screws when directly attaching the
side panel by screws after removing the rack angles.
If the rack angle fixing screws (PSW4 x 16) are used by
mistake, a failure occurs in the operation of the unit
because they are longer than the (B4 x 6) screws.
1-6. Rack Mounting
Outer rail
Intermediate rail
Inner rail
Stopper
A
B
Inner rail
Inner rail
B4 x6
B4 x6
B4 x6
B4 x6
B4 x6
B4 x6
Rack angle
PSW4 x16
PSW4 x16
PSW4 x16
Rack angle
.Attachment of inner rails
(4) Pull out the inner rails from the two intermediate rails.
(5) While pressing the stopper of the inner rail in the
direction of the arrow A in the figure, pull out it in the
direction of the arrow B. (Pull out the other inner rail
in the same way.)
(6) Remove the ten screws from both sides (left and right)
of the unit shown in the figure.
(7) Attach the two inner rails to both sides (left and right)
of the unit using the screws removed in the procedure
(6).
Tighting torque: 1.2 N.m {12.2 kgf.cm}
n
Be sure to attach the inner rail using the screws (B4 x
6). If other screws are used, a failure occurs in the
operation of the unit.

1-6 DNW-A100/A50/A45
DNW-A100P/A50P/A45P
.Attachment of outer rails
(12)As shown in the figure, fix the outer rails on both sides
(left and right) temporarily to the 2U position from the
bottom of the space by 5U for installing this unit, with
eight hexagon socket head cap screws and eight flat
washers (front and rear, and right and left positions).
n
Be sure to leave a space on the top of this unit by 1U to
reduce an increase in the internal temperature of this unit.
(13)Adjust the position of rails on both sides (left and
right) so that the distance from the surface of the rack
to the tip of the rail become 50 to 55 mm.
(14)Tighten the screws (four positions, total eight) attach-
ing the rail bracket temporariry using the following
tighting torque.
Tighting torque: 1.2 N.m {12.2 kgf.cm}
1-6. Rack Mounting
Plate nut (large)
Rail bracket
Outer rail
Intermediate rail
B4 x8
Plate nut (large) Rail blacket
Outer rail
Intermediate rail
B4 x8
Ball retainer
Plate nut (small)
Rail bracket
Flat washer
Hexagon socket 
head cap screw
L-shaped hexagon wrench
By 5U
2U
Leave a space by 1U
Rack
50 to 55 mm Intermediate rail
Outer rail
Rack angle B4 x8
.Temporary attachment of rail brackets
(10)Stagger the outer rail and the intermediate rail as
shown in the figure. And attach the rail bracket to the
outer rail temporarily using the plate nuts (large) and
the two screws. (Attach the rail bracket to the other
outer rail temporarily in the same way.)
(11)Stagger the ball retainer as shown in the figure . And
attach the rail bracket to the outer rail temporarily
using the plate nuts (large) and the two screws. (Attach
the rail bracket to the other outer rail temporarily in the
same way.)

1-7
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
(15)Be sure that the distance between the intermediate rails
on both sides (left and right) satisfy the specifications.
(16)Tighten the hexagon socket head cap screws (four
positions, total eight) attaching the outer rails to the
rack temporarily using the L-shaped hexagon wrench.
1-6. Rack Mounting
A'
A
Intermediate rails
A = A' = 416 mm

1-8 DNW-A100/A50/A45
DNW-A100P/A50P/A45P
(21)Take the unit in and out from the rack about three
times and be sure that slide rail moves smoothly.
If slide rail does not move smoothly, remove the unit
and go back to “Attachment of outer rails”
(procedure12).
CAUTIONS
.Have two or more persons to remove.
.This unit does not have the feet in this operation.
When you put down this unit from the rack, be
careful not to give a shock to it.
(22)Fix the unit to the rack using two screws and two
ornamental washers.
Tighting torque: 1.2 N.m {12.2 kgf.cm}
1-6. Rack Mounting
Intermediate rail
Ball retainer
Stopper
Stopper
Intermediate rail
Inner rail
Ornamental washer
RK5 x14
Ornamental washer
RK5 x14
.Mounting in rack
c
Have two or more persons to do this work.
(17)Stagger the ball retainers of intermediate rails on both
sides (left and right) toward you.
(18)Pull the rails out equal length from both sides (left and
right) .
(19)Lift the unit holding the handles, insert the inner rails
into the intermediate rails slowly.
(20)While pressing the stoppers on the both sides (left and
right) , push the unit into the rack slowly.
n
Exercise care to avoid catching your finger or hand in
rack mount rail.