Philips CDI 740 General Maintenance
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No service manual for the Philips CDI 740 has been found. The only published strip-down is a set of photographs by Coffee Fueled Retro, which shows the power supply, the front display panel, the Digital Video cartridge, the CDM 12.1 mechanism and the Mono IV main board, without written steps.[1] The main board belongs to the same large Mono IV family as the CDI 660's, so the board-level work (NVRAM socket, fuse positions, 50/60 Hz links) is written up on the Philips CDI 660 General Maintenance page.[2] The 740's cabinet, front panel and power supply are its own.[3][4]
Safety
[edit | edit source]- Unplug the player and leave the power switch on for a while before opening it, so that the filter capacitors in the supply discharge. retrostuff.org warns that the large filter capacitors in CD-i supplies can give an electric shock if they are not discharged.[3]
- Philips' manual says that only a qualified service person should take the cover off, because of the laser.[4]
Before you start
[edit | edit source]- Back up the NVRAM. The 740 has the 32 KB type, an SRAM in a battery-backed DS1216C socket, and taking the SRAM out of its socket wipes it.[5][6] Battery damage in general is covered on Battery Explosion, Capacitor or Corrosion Damage. retrostuff.org uses a null-modem cable and its CD-i Link program to copy the contents to a PC.[2]
- If the tray is locked ("TRAY LOCKED" on screen), unlock it before stripping the player: switch on while holding STOP for at least five seconds.[4]
- Coffee Fueled Retro's gallery shows where the boards and cables sit inside a 740.[1]
Power supply (20PS308)
[edit | edit source]| Item | Detail |
|---|---|
| Fitted to | CDI 740 |
| Philips number (EU version /00) | 3122 427 20283 |
| Mains inlet | IEC C8 |
| Input | 100–240 V AC, 50/60 Hz |
| Outputs | +5 V, −5 V and +12 V (not yet confirmed) |
| Mains fuse | 1101, T1.0A L 250 V glass fuse, 5 × 20 mm |
| +5 V fuses | 1215 and 1216, MP315 (TE5) |
| Pinout | Not yet confirmed |
| Service manual | None |
[3] The 20PS308 differs from the 20PS307 of the professional players, whose +5 V fuses are numbered 1200 and 1201 and which has a C14 inlet.[3]
Main board
[edit | edit source]- The −5 V fuse 3255 (MP100, 65 V 1 A) sits beside the power supply connector, in grid square F1, on every Mono IV board. A resettable PTC fuse in grid square C1 protects the +5 V feed to the controller and serial ports and the RF modulator socket.[7]
- −5 V is easiest to measure on pins A1, B1 and C1 of the extension connector.[7]
- On large Mono IV boards a 10 kΩ link at 3290 (to ground) selects PAL and one at 3203 (to +5 V) selects NTSC, in grid square C2 on the track side.[2] The 740 has RGB on its Euroconnector, which retrostuff.org found gives a colour 60 Hz picture on most televisions after the change.[4][6]
Cleaning discs
[edit | edit source]Wipe discs with a cleaning cloth from the centre outwards. Philips warns against solvents, cleaners and anti-static sprays meant for records.[4]
Related pages
[edit | edit source]- Philips CDI 740
- Philips CDI 740 Troubleshooting Guide
- Philips CDI 740 Capacitor Replacement Guide
- Philips CDI 660 General Maintenance
- Recommended Tools
References
[edit | edit source]- ↑ 1.0 1.1 Gallery: Philips CD-i 740, Coffee Fueled Retro, 18 March 2024—link(accessed 2026-10-20) Photographs of a complete strip-down of a CDI 740/00, with the label data.
- ↑ 2.0 2.1 2.2 Modifications for Philips CD-i Players, retrostuff.org, 12 January 2020, revised 2024—link(accessed 2026-10-20) Sections "Mono IV (large players)", "Brooktree BT9106 & BT9107 / BT9108" and "ROM/Software modifications".
- ↑ 3.0 3.1 3.2 3.3 Philips CD-i Power Supply Units, retrostuff.org, 29 September 2024, revised 10 July 2026—link(accessed 2026-10-20) Sections "20PS307" and "20PS308", and the general warning on filter capacitors.
- ↑ 4.0 4.1 4.2 4.3 4.4 Philips Interactive Media Systems, CDI 740 User manual, 3104 125 21681, © 1996: "Before requesting service" (PDF p. 15); specifications (PDF pp. 18–19); accessories (PDF p. 20). Hosted here as File:Philips CDI 740 User Manual.pdf.
- ↑ NVRAM+RTC Solutions for Philips CD-i Players, retrostuff.org, 31 December 2021, revised 25 November 2025—link(accessed 2026-10-20) Section "32 KB (SmartWatch)": the DS1216C socket, its batteries and replacements.
- ↑ 6.0 6.1 Philips CDI660 Mono IV NVRAM and 60 Hz Modification, retrostuff.org, 14 October 2019—link(accessed 2026-10-20) Owner's strip-down of a CDI 660/00 to the Mono IV board, the 32 KB NVRAM socket and the 50/60 Hz switch.
- ↑ 7.0 7.1 Philips CD-i Mono III / IV Fuses, retrostuff.org, 29 November 2021, revised 1 October 2024—link(accessed 2026-10-20) The −5 V fuse 3255 and the resettable fuse 3277 on Mono IV boards, the symptoms of a blown −5 V fuse and where to measure.