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Hard Drive: NEC: D3847 1680MB 3.5"/SL SCSI2 FAST




D 3 8 4 7    NEC
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders        | 3144|     |
Capacity form/unform  1680/      MB        Heads           6|   16|     |
Seek time   / track  10.0/ 2.0 ms          Sector/track     |   63|     |
Controller           SCSI2 SI/FAST         Precompensation
Cache/Buffer           384 KB SEGME. WRITE Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                     10.000 MB/S ext
Recording method     PRML                           operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C                 |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle           4.0 W     Shock        g                 |
       seek               W     Rotation   RPM      4500
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates

Layout

NEC D3847 JUMPER SETTING

  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX SCSI
  |                                                         |XX I/F
  |                                                         |XX
  |                                                  SW1    |XX
  |                                                +++++++  |XX
  | +-+                                            +++++++  |XX
  | | | J2                                                  |XX
  | | | Optional                                            |XX
  | +-+ Connector                                           |XX
  |+-+J8                                                    |XX
  |+-+LED                                                   |
  |                                                         |XX POWER
  |                                                         |XX
  +---------------------------------------------------------+

Jumpers

NEC D3847 JUMPER SETTING

Jumper Setting
==============

 SW1                                     / |
  +-----------------------+ON          /   +-------
  |+-+ +-+ +-+ +-+ +-+ +-+|             \  +-------
  ||x| |x| |x| |x| |x| |x||               \| SCSI IF Connector Side
  |+-+ +-+ +-+ +-+ +-+ +-+|
  +-1---2---3---4---5---6-+OFF
    |   |   |   |   |   +------ SCSI ID 2(0)
    |   |   |   |   +---------- SCSI ID 2(1)
    |   |   |   +-------------- SCSI ID 2(2)
    |   |   +------------------ Parity Check   ON -  CHECK
    |   |                                      OFF - NO CHECK
    |   +---------------------- Start Command  ON -  USE
    |                                          OFF - NONE-USE
    +-------------------------- ALLWAYS SETS OFF

 SW1 SCSI ID
 -----------
   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          | ID2(2)| ID2(1)| ID2(0)|
   +----------+-------+-------+-------+
   |    0     | OFF   | OFF   | OFF   |
   |    1     | OFF   | OFF   | ON    |
   |    2     | OFF   | ON    | OFF   |
   |    3     | OFF   | ON    | ON    |
   |    4     | ON    | OFF   | OFF   |
   |    5     | ON    | OFF   | ON    |
   |    6     | ON    | ON    | OFF   |
   |    7     | ON    | ON    | ON    |
   +----------+-------+-------+-------+

 J8 LED Connector
 ----------------
        2  1
     +--------+
     |  |  |  |
     +--+--+--+
     ++++-++-++
      +++-++-+
       |   +---- Anode Side
       +-------- Cathode Side

J2 Optional Connector
---------------------

   +-7+--+--+--+--+-2+
   +--+--+--+--+--+--+
  -+14+--+--+--+--+-9+-
  ---------------------
     Solder Side

 J2 SCSI ID (OPTIONAL!)
 ----------------------
   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          | J2-4  | J2-3  | J2-2  |
   +----------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  | When using connector pin all
   |    1     | OPEN  | OPEN  | GND   | switches are set to off!
   |    2     | OPEN  | GND   | OPEN  |
   |    3     | OPEN  | GND   | GND   |
   |    4     | GND   | OPEN  | OPEN  |
   |    5     | GND   | OPEN  | GND   |
   |    6     | GND   | GND   | OPEN  |
   |    7     | GND   | GND   | GND   |
   +----------+-------+-------+-------+

J2-5 Parity Check

J2-6 The output pin of the clock spindle synchronous operation.

J2-7 The input pin of the clcok spindle synchronous operation.

J2-9-14 GROUND

Install

NEC DSE-1340/2010/2550/D3725/3727/3745/3747 QUICK REFERENCE

Notes on installation
=====================

Drive mounting
--------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x
      UNACCEPTABLE!                                UNACCEPTABLE!
      Never install PC board on the Top!













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