The CDU33A Double Speed Series CD-ROM Drive Unit is an internal CD-ROM drive designed for installation in various computer systems, including IBM PC, PC/XT, PC/AT, and HP Vectra or equivalent machines. This user's guide provides comprehensive instructions for its installation, connection, and operation.
Function Description
The CDU33A CD-ROM Drive Unit is a double-speed CD-ROM drive that allows users to read data from CD-ROM discs. It supports various CD-ROM formats, including CD-ROM mode-1 data discs, CD-ROM mode-2 data discs, CD Audio discs, Audio-combined CD-ROM discs, CD-ROM XA discs, and CD-I discs. The drive is capable of storing up to 540 Mbytes of digital data.
Key features of the drive include:
- 5.25 inch half-height drive form factor: This standard size ensures compatibility with most computer cases.
- Double speed CD-ROM data playback: Offers faster data transfer rates compared to single-speed drives.
- Audio channel selectable by software (stereo, monaural, reverse, etc.): Provides flexibility in audio output configuration.
- Fast access time providing high-speed read operation: Enhances user experience by reducing wait times.
- Real time hardware error correction: Improves data reliability by correcting errors on the fly.
- Manual loading and power ejection of discs: Allows for physical handling of discs and manual ejection in case of power failure.
- Emergency eject function for manual disc ejection: A safety feature to retrieve discs if the electronic eject mechanism fails.
- CD-ROM XA and CD-I disc play: Expands compatibility to a wider range of multimedia CD formats.
The front panel of the drive includes a disc drawer for accepting CD-ROM discs, an emergency eject hole, an eject button, a busy indicator, and a headphones jack with a level control. The rear panel features a subchannel interface connector, a 34-pin interface connector, a power-in connector, a frame ground tab, and an audio output connector.
Important Technical Specifications
Disc:
- Acceptable discs: CD-ROM mode-1 data discs, CD-ROM mode-2 data discs, CD Audio discs, Audio-combined CD-ROM discs, CD-ROM XA discs, CD-I discs.
- Disc diameter: 12 cm, 8 cm.
- Rotational speed (varies from disc to disc):
- Innermost track: 530 rpm at CLV (Constant Linear Velocity) = 1.4 meters/sec (normal speed); 1060 rpm at CLV = 2.8 meters/sec (double speed).
- Outermost track: 200 rpm at CLV = 1.2 meters/sec (normal speed); 400 rpm at CLV = 2.4 meters/sec (double speed).
Drive Performance:
- Data transfer rate:
- Sustained rate: 150 Kbytes/sec (normal speed); 300 Kbytes/sec (double speed).
- Burst rate: 2 Mbytes/sec.
- Access time (typical):
- Full stroke: 0.66 sec (normal speed); 0.33 sec (double speed).
- Average (random): 0.46 sec (normal speed); 0.32 sec (double speed).
- Reliability (Read error rate, includes 5 retries):
- L-EC (Long Error Correction): 1 Block/10⁻² bits (typical).
- L-EC off: 1 Block/10⁻⁷ bits (typical).
Audio:
- Output level:
- Line output: 0.7 V at 47 KΩ.
- Headphone output: 0.5 V at 32 Ω.
Environment:
- Operating:
- Temperature: 5°C to 50°C (41°F to 122°F).
- Humidity: 10% to 90%.
- Absolute humidity: 30 grams/m³ (max wet bulb temperature: 29°C).
- Atmosphere: Non-condensing.
- Non-operating/Storage:
- Temperature: -20°C to 50°C (-4°F to 122°F).
- Humidity: 10% to 90%.
- Atmosphere: Non-condensing.
- Vibration:
- Operating: 0.2 Grms at 5 Hz to 500 Hz.
- Non-operating: 2 Grms at 5 Hz to 500 Hz.
- Transportation: 0.015 G²/Hz at 5 Hz to 50 Hz (with standard package).
- Damage Boundary: 65 ips/40 G.
Dimensions and Weight:
- Dimensions: Approx. 146 x 41 x 178 mm (w/h/d) (5¾ x 1⅝ x 8 inches).
- Weight: Approx. 0.8 kg (1 lb 12 oz).
Power Requirement:
- Voltage: +5 V DC ± 5% and +12 V DC ± 10%.
- Ripple: +5 V: 0.05 Vp-p at 250 mA; +12 V: 0.1 Vp-p at 500 mA.
- Current:
- +5 V: 200 mA at Read; 600 mA at Seek.
- +12 V: 280 mA at Read; 1200 mA at Seek or Spin-up.
Connectors:
- Power-in connector: Molex 53109-0410 or equivalent.
- Interface connector: 3M 13594-5002 or equivalent.
- Subchannel connector: 3M 13654-5002 or equivalent.
- Audio connector: Molex 5308-04A or equivalent.
Laser:
- Type: Semiconductor laser GaAlAs.
- Wave length: 780 nm.
- Output power: 0.6 mW.
Usage Features
The CDU33A drive is designed for ease of use and integration into existing computer systems.
- Installation: The drive requires careful installation, including preparing a slot in the computer, mounting the drive, and connecting various cables (power, frame ground, audio, and ISA bus interface). The manual provides detailed steps with illustrations for each stage of the installation process. It is crucial to ensure proper screw overhang to prevent damage to the side panels or bottom plate.
- Operation: To start the drive, users simply turn on the power supply, press the eject button to open the disc drawer, place the disc (label side up) in the drawer, and push the drawer gently until it locks. The busy indicator lights up while data is read from the disc and flashes during seek operations.
- Emergency Eject: In case of power failure or if the eject button is disabled by the computer, a 1.2 mm steel rod can be inserted into the emergency eject hole on the front panel to manually eject the disc drawer.
- Software Compatibility: The drive requires appropriate application software to enable reading of data stored on a disc. It supports data from CD-ROM discs of the High Sierra Group (HSG) or ISO-9660 logical format. Sony OPA-470 series MS-DOS CD-ROM Extensions are recommended for use with IBM PC, PC/XT, and PC/AT systems.
Maintenance Features
The manual emphasizes several precautions to ensure the longevity and proper functioning of the drive:
- Installation Environment: Avoid placing the drive in locations with high humidity, extreme temperatures, mechanical vibration, or direct sunlight. The CDU33A should be used horizontally only.
- Operation Precautions:
- Do not move the drive while it is operating to prevent malfunction.
- Avoid exposing the drive to sudden changes in temperature, which can cause condensation. If condensation occurs, wait until the drive warms up before turning it on.
- Operating the drive immediately after a sudden temperature increase may cause reading errors.
- Transportation: To transport the drive, keep the original packing materials. Always remove the disc before moving the drive and repack it into its original packaging.
The CDU33A is classified as a CLASS 1 LASER PRODUCT. The CLASS 1 LASER PRODUCT label is located on the top of the drive. Users are cautioned against opening the drive unit as invisible laser radiation is present when the enclosure is open and the interlock is defeated. Servicing should only be performed by qualified personnel.
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