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         National Library Service

         for the Blind and                                                                       The Library of Congress

         Physically Handicapped                                                                                 Washington. DC 20542

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No.      11-02

 

Date    May 6, 2011

 

 

Subject            DTBM Repair

 

 

The warranty on digital talking-book machines (DTBMs) manufactured more than thirteen months ago will expire soon.  The return rate of players for warranty repair has been extremely low, and at this time the repair requirement is too small to require a commercial repair contract.  NLS will periodically review the need for commercial repair.

 

Machine-lending agencies (MLAs) should use local resources, especially the volunteer repair network, to repair and refurbish players.  The NLS Inventory Management Section can provide parts and tools to MLAs and volunteers to service and repair DTBMs.  The NLS parts-ordering system is currently being revised to improve the process of ordering repair parts for digital machines.  Until this revision is complete, repair groups that need any parts listed as “back ordered” should contact the NLS equipment repair officer, Kevin Watson, at [log in to unmask] to request the part.  Because of limited availability, parts currently listed as “back ordered” will be supplied only as needed.  In general, MLAs and repair groups should not attempt to build a local parts inventory. 

 

Network libraries and MLAs may order repair parts and tools through PICS.  Volunteer groups may order repair parts and tools at www.loc.gov/nlsparts.  Alternatively an e-mail may be sent to [log in to unmask] for order processing.  For more information on how to order repair parts and tools please review Network Bulletin 05-63, at www.loc.gov/nls/networkdocs/bulletins/2005/0563.html, and Machines and Accessories Report 05-07, at www.loc.gov/nls/networkdocs/machines/2005/0507.html.

 

To assist in servicing and maintaining DTBMs, NLS has made the following materials available to MLAs and repair groups:

 

·         DTBM Service Manual

·         DTBM Library Guide

·         DTBM Repair Kit

·         DTBM Evaluation Machine

Both the service manual and library guide are available for download at http://rt.loc.gov/MDD.  Under the section labeled Digital Talking-Book Machine Information, select the Documentation link to access the download page. 

 

The repair kit includes an ESD mat, a wrist strap, a ground strap, and the hand tools that should be used when servicing the machine.  The evaluation machine is intended for the MLA or repair group to keep as a permanent training tool for staff.  Both the repair kit and DTBM evaluation machine may be ordered by contacting the NLS equipment repair officer, Kevin Watson, at [log in to unmask]  Only one repair kit per group is available at this time as supplies are limited.  Evaluation machines are extremely limited and will be available on a first-come, first-served basis.

 

Attachments:   DTBM repair parts

                        DTBM repair tools

 

For further information contact:   John Brown

Head, Engineering Section

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ATTACHMENT 1

DTBM repair parts

DTBMs currently have 30 repair parts.  The procedure for ordering parts will be the same as for C-1s.  The part numbers and descriptions are listed below:

 

Part Number

Reference Number

Description

D-P-01

N/A

Completed PCB assembly

D-P-02

4824591202

Upper housing sub-assembly (standard DTBM, with speaker, cable, and dock seal installed)

D-P-03

4824591252

Upper housing sub-assembly (advanced DTBM, with speaker, cable, and dock seal installed)

D-P-04

4824591102

Lower housing sub-assembly (with labels, cable tie mount, and battery foam)

D-P-05

4824591311

Panel (battery access)

D-P-06

4824591310

Battery pack

D-P-07

4824591201

Keypad (standard DTBM)

D-P-08

4824591251

Keypad (advanced DTBM)

D-P-09

4824591320

Cable (power supply)

D-P-10

4824591071

Power supply

D-P-11

4824592020

AC power cable

D-P-12

4824591145

Assembly (cartridge USB cable/connectors)

D-P-13

4824591155

Assembly (A/T USB cable/connectors)

D-P-14

4824591150

Assembly (headphone cable/connectors)

D-P-15

4824591313

Rubber feet

D-P-16

4824591101

Handle

D-P-17

4824591319

Spring (compression)

D-P-18

4824591303

Handle retainer

D-P-19

4824591314

Dock seal, upper

D-P-20

4824591304

Screw, mounting

D-P-21

4824591305

Screw, housing

D-P-22

4824591312

Screw, battery access panel

D-P-23

4824591309

Washer (nylon)

D-P-24

4824591307

Cable tie mount

D-P-25

4824591308

Cable tie

D-P-26

4824591316

Foam (battery compartment)

D-P-27

4824591159

Cover (A/T USB connector)

D-P-28

4824591302

Speaker, cable, and connector

D-P-29

4824591301

Grill cloth

D-P-30

4824591315

Adhesive shim (speaker)

 

Note: Although the printed circuit board (PCB), D-P-01, is listed as a repair part, NLS does not   anticipate the need for replacement of the PCB in a machine.  If the PCB in a machine is damaged to the point of replacement, the machine should be scrapped.

 

 

ATTACHMENT 2

DTBM repair tools

 

Individual hand tools for disassembly of the DTBM and removal of battery cover are available.  Part numbers and descriptions are listed below.  MLAs and repair groups are encouraged to order only one set of tools per shop.

 

Part Number

Description

TOOL-30

WIHA 31151 ESD SoftFinish Phillips Driver #1

TOOL-31

WIHA 36218 ESD SoftFinish Driver T10 (yellow)

TOOL-32

WIHA 46725 3K Hex Ballend Driver 2.5 x 100 mm (red and black)