: Commercial discs with small brushes used for basic maintenance if a drive "no disc" error occurs.
Adjust the physical tilt of the laser pickup to eliminate crosstalk. sony dvd test disc
| | Part Number(s) | Description & Typical Use | |-----------|--------------------|-------------------------------| | HLX-503 / HLX-504 (NTSC) | J-6090-069-A / J-6090-088-A | Single‑layer DVD test discs for the NTSC video standard. The HLX-504 is particularly referenced for RF level checks and video signal waveform verification. These discs contain colour bars (75% and 100%), flat fields, pulse‑and‑bar patterns, and other industry‑standard test patterns. | | HLX-506 (PAL) | J-6090-077-A | PAL‑equivalent single‑layer test disc for European and other PAL‑region service centres. | | HLX-501 / HLX-505 (NTSC) | J-6090-071-A / J-6090-089-A | Dual‑layer NTSC test discs used for verifying layer‑change performance and checking the transition between layer 0 and layer 1. The HLX-505 appears on Discogs as a pressed retail disc containing extensive video test signals and Dolby Digital audio tracks. | | HLX-507 (PAL) | J-6090-078-A | Dual‑layer PAL test disc for European service requirements. | : Commercial discs with small brushes used for
Includes frequency sweeps, white noise, and channel identification tracks to test audio output, specifically helping to optimize 5.1 Dolby Digital surround sound. The HLX-504 is particularly referenced for RF level