D 3 7 5 6 NEC Native| Translation ------+-----+-----+----- Form 3.5"/SLIMLINE Cylinders 1251| 625| | Capacity form/unform 105/ 131 MB Heads 4| 8| | Seek time / track 19.0/ 8.0 ms Sector/track 41| 41| | Controller IDE / AT Precompensation Cache/Buffer 32 KB LOOK-AHEAD Landing Zone Data transfer rate 1.500 MB/S int Bytes/Sector 512 MB/S ext Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 50 | -40 60 Power: sleep 0.5 W Humidity % 8 80 | standby 1.8 W Altitude km 3.000| 12.000 idle W Shock g 5 | 55 seek W Rotation RPM 3456 read/write 4.0 W Acoustic dBA spin-up W ECC Bit MTBF h 50000 Warranty Month Lift/Lock/Park YES Certificates ********************************************************************** L A Y O U T ********************************************************************** NEC D3756 PRODUCT DESCRIPTION 806-521352-0 +---------------------------------------------------------+ | +---+ | | JP13+---+ | | JP12+---+ |XX | JP11+---+ |XX | |XX | |XX | |XX J1 | |XX | JP17 |XX | +-----+ |XX | +3-2-1+ |XX | |XX | +-J8+ |XX | +---+ |XX | +---+---+----+----+----+ | | |JP2|JP1|JP14|JP15|JP16| |XX Power | +---+---+----+----+----+ |XX J3 +---------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** NEC D3756 PRODUCT DESCRIPTION 806-521352-0 Jumper setting -------------- x = Jumpers are set at factory The D3756 has jumper plugs indicated by marking of JP12, JP13, JP15 and JP17. The function of these jumper plugs are described below. Further, the other jumper plugs are used for inspection at the factory. Please refrain from touching them. JP12/JP13 Master/Slave mode ---------------------------- +----------------------------------------+--------+--------+ |Function | JP12 | JP13 | +----------------------------------------+--------+--------+ x |Set one drive connection mode | OPEN | OPEN | +----------------------------------------+--------+--------+ |No setting is allowed | OPEN | CLOSED | +----------------------------------------+--------+--------+ |Set to two drives connection master mode| CLOSED | OPEN | +----------------------------------------+--------+--------+ |Set to two drives connection slave mode | CLOSED | CLOSED | +----------------------------------------+--------+--------+ JP15 Error Correction ---------------------- +----------------------------------------+--------+ |Function | JP15 | +----------------------------------------+--------+ x |11-bit burst error is corrected. | OPEN | |ECC transfer is performed in 7 bytes by | | |the Read/Write Long command. | | +----------------------------------------+--------+ |5-bit burst error is corrected. | CLOSED | |ECC transfer is performed in 4 bytes by | | |the Read/Write Long command. | | +----------------------------------------+--------+ By allowing retry on execution of the Read command in the drive, recoverable read error is automatically corrected with the retry function of the drive itself. JP17 Auto Power Save Mode --------------------------- +-------------------+--------------------------------------+ | JP17 | Function | +-------------------+--------------------------------------+ |CLOSED for 1 to 2 | Auto power save function is disabled.| +-------------------+--------------------------------------+ |CLOSED for 2 to 3 | Auto power save function is enabled. | +-------------------+--------------------------------------+ The drive offers the auto power save mode as a function to reduce the power consumption. This function is effective in case where access to HDD is not made so frequently. The plug is set for propriety of use of auto power save function. When the auto power save mode is enabled, the drive sends the magnetic head to the shipping cylinder if there has been no access to HDD for 3 minutes, and powers off to the internal circuit except the interface circuit. J1 PC/AT Connector Signal Names and Pin Assignment --------------------------------------------------- +2-4-6-8-10- --40-+ | | +1-3-5-7-9-- -----+ +------------+---------+----------+------------+ |Signal Name | Pin No. | Pin No. |Signal Name | +------------+---------+----------+------------+ | -RESET | 01 | 02 | GND | +------------+---------+----------+------------+ | +DATA 7 | 03 | 04 | +DATA 8 | +------------+---------+----------+------------+ | +DATA 6 | 05 | 06 | +DATA 9 | +------------+---------+----------+------------+ | +DATA 5 | 07 | 08 | +DATA 10 | +------------+---------+----------+------------+ | +DATA 4 | 09 | 10 | +DATA 11 | +------------+---------+----------+------------+ | +DATA 3 | 11 | 12 | +DATA 12 | +------------+---------+----------+------------+ | +DATA 2 | 13 | 14 | +DATA 13 | +------------+---------+----------+------------+ | +DATA 1 | 15 | 16 | +DATA 14 | +------------+---------+----------+------------+ | +DATA 0 | 17 | 18 | +DATA 15 | +------------+---------+----------+------------+ | GND | 19 | 20 | KEY | +------------+---------+----------+------------+ | RSVD | 21 | 22 | GND | +------------+---------+----------+------------+ | -IOW | 23 | 24 | GND | +------------+---------+----------+------------+ | -IOR | 25 | 26 | GND | +------------+---------+----------+------------+ | +IOCHRDY | 27 | 28 | +ALE | +------------+---------+----------+------------+ | RSVD | 29 | 30 | GND | +------------+---------+----------+------------+ | +IRQ14 | 31 | 32 | -IOCS16 | +------------+---------+----------+------------+ | +ADR1 | 33 | 34 | -PDIAG | +------------+---------+----------+------------+ | +ADR0 | 35 | 36 | +ADR2 | +------------+---------+----------+------------+ | -CS0 | 37 | 38 | -CS1 | +------------+---------+----------+------------+ | -SLV/-ACT | 39 | 40 | GND | +------------+---------+----------+------------+ A 40-pin right angle connector is used as the interface connector and pin No.20 is cut off for prevention of erroneous connector insertion. J3 Power Connector ------------------- +---------+ | 1 2 3 4 | +-+-+-+-+-+ | | | +------- + 5 VDC | | +--------- + 5 VDC Return | +----------- +12 VDC Return +------------- +12 VDC J8 External LED ---------------- +------+ 1 : LED anode side | 1 2 | 2 : LED cathode side ----+------+---- PCB ********************************************************************** I N S T A L L ********************************************************************** NEC D3756 PRODUCT DESCRIPTION 806-521352-0 Notes on installation ===================== Installation direction ---------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | x x | | | | | | +------x------x-------+ | +-----+ +-----+ | +-+------x--x-------+-+ +--+ +--+ | xx | | x x | +---x--------x----+ x x The D3756 can be installed either horizontally or vertically. In horizontal installation, mount the drive to maintain a posture that its printed-circuit board will be situated below (The drive cannot be mounted with the interface connector J1 and the power connector J3 positioned above or below). The drive has 10 mounting screw holes. Use these screw holes for installation. It requires an interface cable and power supply cable to operate the drive. Further, this drive has various optional functions including master/slave configuration. Frame ----- The D3756 has a frame with 10 mounting screws holes. This frame is insulated from the disk enclosure assembly with a shock absorber for absorbing vibration and shock. On system installation, allow a clearance of at least 2.54 mm around the drive to prevent the disk enclosure assembly from contacting with the system frame. Connector J1 ------------ Connector J1 for the interface is a 40-pin box type and right angle connector. Use the interface cable within the limit of 46 cm length. Sample: Adapted connector on the J1 cable side: DUPONT 66900-240 or equivalent (Integrated housing and pin) Connector J3 ------------ The power supply connector J3 is AMP P/N 350211-1 or equivalent. The AMP P/N 1-480424-0 is applicable to a connector housing on the cable side. For the power cable, take current consumption of the drive and cable length into consideration. Use a connector pin suit- able for the wiring. Connector J8 ------------ The D3756 is provided with a signal connector used to illuminate LED to indicate that the drive is busy in exchanging data/command to and from PC/AT host system. The signal connector is ELCO 00 8283 0211 00000 or equivalent. The ELCO 60 8283 3028 45000 or equivalent is applicable to a housing on the cable side and ELCO 60 8283 0513 99 808 is a receptacle contact. Jumper Plug Type ---------------- If the jumper plug setting is to be changed for the setting when it is shipped from the factory, please use the following jumper plug: Recommended Plug: DUPONT LU-JUMP socket 68905-001 ********************************************************************** F E A T U R E S ********************************************************************** NEC D3756 PRODUCT DESCRIPTION 806-521352-0 General Outline and Features ---------------------------- The D3756 Magnetic Disk Drive is a storage device using 3.5" magnetic disk platter and mini-Winchester type magnetic head with unformatted storage capacity of 131.3 MB, and adopts the PC/AT interface. The rotary voice coil motor used in its positioning mechanism brings about read and write operations with high-speed seek and high- reliability. Features With the Winchester technology employed, the magnetic disk platter and magnetic heads are housed in the enclosure made of aluminium alloy. The sector servo mode system is used for control of magnetic head positioning. By using this system, average seek time is reduced to 19 milliseconds. The CSS (Contact Start Stop) area provided on the innermost cylinder of the magnetic disk platters, together with auto retract function and auto carriage lock mechanismem, assure a high reliability against vibration and shock during transportation. The built-in PC/AT interface is a popular interface for personal computers and facilitates system configuration. The Read Look Ahead Cache function by the track buffer is supported. By using the magnetic disk drive with read/write capability of 1.5 MB per second in 1:1 interleave, the system operation speed is enhanced. Having the master/slave function, two drives can be connected in daisy-chain using the same interface cable. By supporting the General Translation function, the optional disk parameter within disk storage capacity can be used. Disk Enclosure Assembly ----------------------- The disk enclosure (DE) comprises magnetic disk platters, magnetic heads, head carriage mechanism, rotary voice coil motor and air filter. The spindle motor to rotate the magnetic disk platters consists in a inside-hup type DC brushless motor. Printed-Circuit Board Assembly ------------------------------ PC/AT interface circuit, buffer RAM, DMA controller, read/write control circuit, servo control circuit and spindle motor drive circuit are installed for control on the overall operation of the drive and interface. Interface Circuit ----------------- Use by input and output conditions as shown below. Input Signal Low = 0.0 VDC to 0.8 VDC Signal High = 2.2 VDC to service voltage of 5 V. Output Signal Low = 0.0 VDC to 0.4 VDC (0.5 V @ 12mA Sink) Signal High = 2.5 VDC to 5.25 VDC or Open Circuit Reliability ----------- MTBF 50,000 POH MTTR Within 30 minutes Periodical maintenance Not necassary Service life 5 years or 20,000 POH whichever reaches first.