{"id":18698,"date":"2026-05-14T16:31:43","date_gmt":"2026-05-14T14:31:43","guid":{"rendered":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=18698"},"modified":"2026-05-14T16:51:13","modified_gmt":"2026-05-14T14:51:13","slug":"glass-disc","status":"publish","type":"post","link":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=18698","title":{"rendered":"Glass Disc for Mechanical Measurements And Settings"},"content":{"rendered":"

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

MECHANICAL MEASUREMENTS AND SETTINGS<\/p>\n

Turntable height setting (see service manual CD player)<\/p>\n

Place the small mirror 4822 395 90205 on the objective and the glass plate 4822 395 90204 (with pressure bar 4822 532 60906) on the turntable.<\/p>\n

Place the device under a light source with a straight line underneath it (e.g. fluorescent tube with grid).
\nSet the tonearm to the center position. Rotate the device so that the tonearm is parallel to the line under the light source (see also Fig.).
\nObserve the reflection of the line on the glass plate and mirror in the direction and along its extension.
\nThese lines must not be more than 4 mm apart. Position the device so that a line runs across the center of the mirror.<\/p>\n

When the other line remains within the surface of the mirror, the distance is <4 mm.<\/p>\n

 <\/p>\n

\"\"<\/p>\n

Rotate the CD mechanism 90\u00b0 relative to the previous position. The arm must remain in the center position (see Fig.).<\/p>\n

Repeat the previous measurement.<\/p>\n

Adjusting the angle setting<\/p>\n

When adjusting the plate-light path angle at the factory, a compromise was sought between minimal angular deviation and minimal arm friction.<\/p>\n

If the measurement shows that the angle falls outside the given tolerance, the angle must NOT be adjusted to minimize deviation, but rather within the tolerance. The new setting must lie between the old setting and the optimal setting.<\/p>\n

 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

After adjustment, the friction of the arm must be checked. This is done using a pressure gauge applied to the counterweight. The friction of the arm, measured over the entire range of motion, must not exceed 30 mN.<\/p>\n

If the friction proves to be too high, the setting must be returned to the original value. Then replace the arm with a new one and check the angle again.
\nThe angle is adjusted as follows:<\/p>\n

Place the device on the service supports 4822 395 30202.
\n30 709 A15
\nLoosen screws C (See Fig.) until bearing plate D
\ncan be moved.<\/p>\n

Correct the angle setting by moving the bearing plate in the direction indicated in the figure.<\/p>\n

Tighten screws C, ensuring that the setting
\ndoes not drift.<\/p>\n

After this, check the angle setting again in two directions.<\/p>\n

 <\/p>\n

 <\/p>\n

\"\"<\/p>\n

\n
\n
<\/div>\n<\/div>\n
\n
\n
<\/div>\n

After adjusting the angle, the height adjustment must be made<\/span><\/span> of the turntable must be checked.<\/span><\/span><\/span><\/p>\n<\/div>\n

Video : Adjusting \u00a0the Swing Arm Angel <\/a>\u00a0\u00a0<\/span><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

  MECHANICAL MEASUREMENTS AND SETTINGS Turntable height setting (see service manual CD player) Place the small mirror 4822 395 90205 on the objective and the glass plate 4822 395 90204 (with pressure bar 4822...<\/p>\n","protected":false},"author":1,"featured_media":18693,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,121],"tags":[],"class_list":["post-18698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-measurement","category-philips"],"yoast_head":"\nGlass Disc for Mechanical Measurements And Settings - Bram Jacobse<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bramjacobse.nl\/wordpress\/?p=18698\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Glass Disc for Mechanical Measurements And Settings - 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