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Philips CDI 350 General Maintenance

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Philips CDI 350 controls and connections (user manual)
Controls and connections of the CDI 350, from the owner's manual

Routine work on the Philips CDI 350 portable CD-i player comes down to taking it apart, running it on the bench without its top cover, the Timekeeper NVRAM, the AC adapter and the LCD unit. The steps below come from chapter 4 of Philips's service manual and from retrostuff's repair of two players.[1][2] The Philips CDI 360 is built the same way; its own differences are on the Philips CDI 360 General Maintenance page. Fault finding is on the Philips CDI 350 Troubleshooting Guide and the capacitor list on the Philips CDI 350 Capacitor Replacement Guide.

Safety

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  • The AC adapter is a mains switch-mode supply. Its circuit diagram is marked as a hot circuit, with the instruction to always use a separate isolation transformer when working on it.[3]
  • Parts marked with a warning triangle are safety parts and must be replaced only with identical types.[4]
  • The laser, monitor diode and photodiodes in the CDM-9 are sensitive to static. Keep yourself and your tools at the potential of the set's screening while working, and short the CDM flex foil with a paper clip or conductive clip as soon as it is unplugged.[1]
  • The LCD backlight is a fluorescent lamp driven by the DC/AC converter board PB06. Philips requires the lamp's solder joints and the PB06 joints to be insulated with silicone rubber after any soldering.[5]

Opening the player

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Top cover

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Remove the cover 055B/056B over the FMV (Digital Video) connector. Remove the five screws on the bottom of the player and the two on the right-hand side; screw 3 is the long one. Lift the top cover from the bottom side, lay it over on the right-hand side, and unplug the flex wires from J402 and JF01 and the connector J502. The top cover, with the screen and CD lid, then comes away.[1]

CD mechanism and main board

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Remove the four screws holding the CDM and unplug its flex wire from J801 and its motor lead from J802. To lift a flex foil out, raise the upper part of the connector first, then short the foil's contacts with a paper clip. Remove the sheet 036B, then two screws on the main board and two on the power plug board PP06, and lift out the main board PM06.[1] retrostuff found that the CDM-9 has to come out before the main board can be reached, and he unscrewed and desoldered a metal shield over the input and output sockets to work on the board.[2] On reassembly, solder the shield back, fit the small plastic piece of the PAL/NTSC switch with its bevelled edges towards the board, and refit the screw underneath the CDM.[6]

Running the board on the bench

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Philips's service position lets the player run with the top cover off:[1]

  1. Fit an extension flex for the CDM. Philips supplies the flex as 4822 322 40066; solder a J801 flex connector to it. Plug the motor lead into J802 and stand the CDM beside the front of the main board. Both sides of the board can then be reached by turning it over.
  2. Short pins 5 and 6 of J502, for example with a female connector wired with those two pins linked.
  3. Connect the AC adapter to the PP06 board and link points X and Y on the main board, near JF01, to switch the player on. It can then be worked with the remote control.
  4. To play a disc, lay it on the turntable and put the magnetic clamper 058B on top. retrostuff used a clamper from an old CD-ROM drive.[2]

CD lid

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Remove the top cover first. Stand the LCD unit upright so that the two lid shafts can be reached from behind, and pull them out with tweezers. Take care of the lid's flex wire when refitting shaft 1. The lid is supplied as one service part; only the clamper 058B and clamper bracket 002B are available separately.[7]

LCD unit and backlight

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  1. Remove the two screws from the hinges and lift the LCD housing away, minding its flex wire.
  2. Prise off the side caps 046B (right) and 047B (left), remove two screws on each side and the two that hold the hinges from behind, and open the housing.
  3. Remove screws A1 and A2 and the bracket 090B with PL01, then screws B1 and B2 on the converter board PB06 with its part 092B, then the four screws C1 to C4 on the bracket. The LCD screen unit then comes out.
  4. The backlight unit is exchangeable: remove two screws on the back of the LCD unit and lift it off. Move the two wires WB01 and WB02 from the old unit to the new one after removing the new unit's connector, and do not separate the small board and lamp from PL50.

[7] After soldering on PB06 or on the lamp connections, coat the joints with silicone rubber again at the original coating points; Philips specifies RTV KE3490 for this insulation.[7][5]

NVRAM and clock

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The settings and clock are held in an SGS-Thomson MK48T08B Timekeeper, which carries its own cell.[8][9] On retrostuff's player a flat Timekeeper reset the settings to their defaults at every power-off. He found it soldered from both sides, needing a strong desoldering gun or patience, and fitted a socket with a new chip; the socketed chip stood slightly taller, so he trimmed a small part of the CDM frame in the top cover to clear it.[2][6] He later used a Dallas DS1643, which cannot be calibrated; retrostuff's NVRAM article lists the ST M48T08-150PC1 and the DS1643 as replacements for the 8 KB Timekeeper.[9][10]

The low-level test has a clock calibration step (step 11) for the Timekeeper, run from a VT100 terminal with a frequency counter. The 350 manual's text for this step is copied from the CDI 205 manual and names pin 21 of IC7205, a position from the 205's board; the signal to measure is CSCDICN, which appears in the 350's signal list.[11] The full procedure is on the CDI 205 maintenance page.

AC adapter

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The 22ER9151 adapter supplies +12 V at 1.6 A, −10 V at 0.7 A, +5.2 V at 2.7 A and +5 V standby at 15 mA through a 14-pin plug.[12] When testing it out of the player, load it first: Philips specifies two 5.1 Ω 10 W resistors (4822 053 34518) on the +5M and +5F rails, and a switch between +5STB and the power on/off line so that the standby circuit can turn the supply on. Never switch it on without the load resistors.[13]

Supply at connector JP01 on the main board, after power-on
Pin Supply Rails fed
1 +12 V +12T, +5L, +10A, +12E, +12B, +12V (speaker amplifier)
2 +12 V +8S
4 −10 V −8L, −8S, −8A
5 Power on/off 5 V on, 0 V off
6 +5.2 V +5M (MMC and other digital circuits)
8 +5.2 V +5A, +5K, +5E
10 +5.2 V +5F (extension socket)
12 +5 V standby +5STB (front CPU ICF1)
13 BATTL 5 V full, 0 V low
3, 7, 9, 11, 14 Ground

[13]

Care

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The owner's manual asks for the transport protection pad to be refitted whenever the player is carried, and says the lens should never be cleaned; condensation on the lens after a move from cold to warm should be left to clear by itself.[14] retrostuff found a transport protection card under the CD lid of one of his players.[2]

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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 Philips, Service Manual CDI 350, PDF p. 13, section 4.1 (servicing the main board PM06: top cover, CDM, extension flex 4822 322 40066, operating without top cover, playing). File:Philips CDI 350 Service Manual.pdf.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 retrostuff, "Philips CDI350 Repair Part 1" (27 December 2018, retrieved 2026-10-20).
  3. ↑ Philips, Service Manual CDI 350, PDF p. 45, section 6.6.2 (AC adapter circuit diagram: hot circuit, use a separate isolation transformer). File:Philips CDI 350 Service Manual.pdf.
  4. ↑ Philips, Service Manual CDI 350, PDF p. 8, section 3.1 (safety instructions). File:Philips CDI 350 Service Manual.pdf.
  5. ↑ 5.0 5.1 Philips, Service Manual CDI 350, PDF p. 12, section 3.4.6 (silicone gum for the isolation: RTV KE3490), and PDF p. 51, section 7.3 (coating points on PB06 and PL50). File:Philips CDI 350 Service Manual.pdf.
  6. ↑ 6.0 6.1 retrostuff, "Philips CDI350 Repair Part 2" (3 February 2019, retrieved 2026-10-20).
  7. ↑ 7.0 7.1 7.2 Philips, Service Manual CDI 350, PDF p. 14, sections 4.2 and 4.3 (CD lid; LCD housing, LCD screen unit and backlight unit). File:Philips CDI 350 Service Manual.pdf.
  8. ↑ Philips, Service Manual CDI 350, PDF p. 16, section 5.1 (MK48T08B clock and calendar chip). File:Philips CDI 350 Service Manual.pdf.
  9. ↑ 9.0 9.1 retrostuff, "Philips CDI350 Repair Part 3" (24 May 2020, retrieved 2026-10-20).
  10. ↑ retrostuff, "NVRAM+RTC Solutions for Philips CD-i Players" (retrieved 2026-10-20): section "8 KB (Timekeeper)".
  11. ↑ Philips, Service Manual CDI 350, PDF p. 18, section 5.1, step 11 (clock calibration), and PDF p. 21, section 6.2 (signal list including CSCDICN). File:Philips CDI 350 Service Manual.pdf.
  12. ↑ Philips Interactive Media Systems, Service Manual: Portable compact disc interactive player CDI 350/00/05/11/17, March 1993, PDF p. 5, section 2.1 (22ER9151 adapter outputs, DC input pinning). Hosted as File:Philips CDI 350 Service Manual.pdf.
  13. ↑ 13.0 13.1 Philips, Service Manual CDI 350, PDF p. 46, sections 7.1.1 (power supply unit: load resistors and power switch) and 7.2.1 (supply at JP01 and power lines). File:Philips CDI 350 Service Manual.pdf.
  14. ↑ Philips, CDI 350 owner's manual, PDF p. 15 ("Care of the unit" and "Before requesting service"). File:Philips CDI 350 User Manual.pdf.


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