CEC TL1

Commentary

CD transport using belt drive system.

The mechanism uses a belt drive system.
In conventional CD players, in order to reproduce a signal recorded on a CD at a constant linear velocity, the rotational speed of the disc from the inner circumference to the outer circumference is changed from approximately 500 rpm to approximately 200 rpm, and further control is performed to keep the linear velocity constant due to the eccentricity component. However, in order to finely change the angular velocity of a rotating body with a large inertia, a large acceleration is required, and this causes the entire body to fluctuate, resulting in vibration, which affects the reproduction effect of the CD.
In the belt drive system, not only the pickup feed mechanism but also the disk rotation system is equipped with a special belt whose durability has been verified through severe reliability tests. This belt absorbs and blocks vibration and noise from the motor. In addition, a low-torque motor with greatly reduced cogging is used as the drive motor. This reduces electromagnetic noise generated by driving the high-torque motor at high current.

A stabilizer system is used to secure the disc.
The large stabilizer ensures that the disc is centered and held securely, and the large design (120 mm, 370g) matched to the outer diameter of the disc provides a large moment of inertia 26 times larger than that of the disc.

Φ 4 mm bearing is used for the shaft bearing.
These bearings are made of carefully selected materials using ultra-precision machining technology developed through analog players.

The servo circuit uses a unique method.
In the TL1, in order to maintain the wheel effect of the large stabilizer while making effective use of it, time information is obtained by the subcode, and it functions to give appropriate torque to the motor. In addition, appropriate torque is given at the start of rotation and at the time of access. Furthermore, the linear velocity change due to the eccentricity component of one rotation or less is all handled by the PLL servo.

The main chassis is made of 2 mm thick steel plate and the enclosure is made of extruded aluminum up to 8 mm thick. The main chassis and the enclosure are equipped with damper seats to effectively suppress vibration and resonance, thereby eliminating not only vibrations from internal mechanisms but also adverse effects from external vibrations and sound pressure.
In addition, the strut supporting the mechanism is composed of cushion rubber and coil spring, and high damping characteristics are obtained.

Wireless remote control is included.

Model Rating

Type	Belt-driven CD transport
Optical output	ST link : -16 to 12.2 dBm TOS link : -21 to 15 dBm
Coaxial output	BNC : 0.5Vp-p/75 Ω RCA : 0.5Vp-p/75 Ω
External dimensions	Width 360x Height 140x Depth 420 mm
Weight	17kg
Attachment	Stabilizer AC Cable Wireless Remote Control