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Philips CDI 450 Capacitor Replacement Guide

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Philips CDI 450 power supply PCB layout (service manual)
20PS301 power supply board for the CDI 450, with the 100 µF 400 V reservoir 2103 at upper left and the output capacitors 2201 to 2206 at lower left (service manual section 6.3.1)

The Philips CDI 450 has 29 aluminium electrolytic capacitors: 22 on the main panel and seven in the external 20PS301 power supply. Philips's parts lists give the value and voltage of each; 22 of them also have a Philips code number, all in the 4822 124 series.[1][2] The main panel's component-side index gives the grid square of each one.[3] For failure signs in general see Capacitor Failure Symptoms.

Before replacing anything

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Most CDI 450 faults that retrostuff reports are in the NVRAM timekeeper, the CD mechanism and the power supply plug, so rule those out first.[4][5][6] Measure the +5 V supply at the key ICs as set out on the troubleshooting guide.[7]

Mains voltage is present only inside the 20PS301 supply. Its primary reservoir 2103 is a 100 µF 400 V part; unplug the supply and let it discharge before opening it, and check 2103 with a meter.[2][6]

Power supply 20PS301

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20PS301 electrolytic capacitors (service manual sections 6.3.2 and 8.3)
Ref Value Rating Philips code Where it sits on the circuit diagram
2103 100 µF 400 V 4822 124 42191 Primary reservoir after the bridge rectifier 7101
2112 47 µF 25 V - Auxiliary winding (pins 3 and 4) after diode 6109, on the controller side
2201 4700 µF 16 V 4822 124 23183 +5 V reservoir across the output, after the fuses 1201 and 1203 on winding pin 10
2203 3300 µF 10 V - +5 V output after the choke 5201, beside the zener 6202
2204 100 µF 35 V - With the rectifier 6204 (BYV10-40) on winding pin 16
2205 1000 µF 10 V - Between the 0 V line and the negative supply that feeds the -5 V regulator 7202 through 3209 and 3210
2206 100 µF 35 V - -5 V output of the regulator 7202 (MC79M05CT)

[2][8]

A dash in the code column means the parts list gives the value without a code number. All seven are 20 % tolerance parts.[8]

The other capacitors in the supply are film or ceramic: 2101 (330 nF 250 V) across the mains input, 2113 and 2114 (2.2 nF 400 V), 2105 to 2108 and 2110 (220 nF 63 V, and 22 nF 250 V for 2108), 2109 (1.5 nF), 2111 (2.2 nF), 2202 (100 nF) and 2207 (15 nF).[8] 2101, 2113 and 2114 carry the warning triangle that marks safety components on the circuit diagram, and Philips requires identical parts in those positions.[2][9]

Main panel

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Main panel electrolytic capacitors (service manual sections 6.4.2 and 8.2)
Ref Value Rating Philips code Grid (component side)
2149 47 µF 6.3 V 4822 124 80483 A2
2255 47 µF 25 V 4822 124 40433 D6
2271 330 µF 16 V 4822 124 40849 A4
2272 100 µF 10 V - A4
2331 1000 µF 6.3 V 4822 124 80602 A4
2337 100 µF 10 V - B4
2347 2.2 µF 63 V 4822 124 40244 A4
2352 47 µF 6.3 V 4822 124 80483 A4
2353 47 µF 6.3 V 4822 124 80483 B4
2367 100 µF 10 V 4822 124 41584 A4
2375 100 µF 16 V 4822 124 22339 A2
2376 100 µF 16 V 4822 124 22339 A3
2380 100 µF 10 V 4822 124 41584 A3
2390 100 µF 10 V 4822 124 41584 B4
2413 47 µF 25 V 4822 124 40433 C6
2445 47 µF 6.3 V 4822 124 80483 A5
2448 47 µF 6.3 V 4822 124 80483 B5
2455 47 µF 6.3 V 4822 124 80483 C5
2510 100 µF 10 V 4822 124 41584 C5
2518 100 µF 10 V 4822 124 41584 D5
2521 47 µF 25 V 4822 124 40433 C6
2523 47 µF 25 V 4822 124 40433 C6

[1][3]

In total: one 1000 µF 6.3 V, one 330 µF 16 V, two 100 µF 16 V, seven 100 µF 10 V, four 47 µF 25 V, six 47 µF 6.3 V and one 2.2 µF 63 V.[1] 2272 and 2337 have no code number in the parts list.[1] The grid squares refer to the drawing of the main panel's component side, columns 1 to 6 and rows A to D.[3]

The remaining main panel capacitors are ceramic parts (mostly 22 nF 63 V), with 470 nF 25 V parts at 2206, 2454, 2524 and 2526, all with 4822 122, 4822 126 or 5322 122 codes.[1]

Philips CDI 450 mainboard component side (service manual)
Main panel component side with the grid index (service manual section 6.4.2). Find a capacitor's grid square in the table above, then its designator on the drawing.

The parts list does not give a capacitor's case size. Photograph or measure each part before ordering, and check the height of any part under the metal shield.

Procedure

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  1. Unplug the power supply from the player.
  2. Open the player and lift out the main panel, using the exploded view on the maintenance page. Photograph every connector and cable run first.[10]
  3. Work with the ESD precautions Philips gives: an antistatic mat with a wrist lead, and an iron at the same potential as the board.[9]
  4. Note the polarity of each capacitor before removing it. On a Philips CDI 350 recap, retrostuff fitted two electrolytics the wrong way round by following the + marks on the board instead of the white dots.[11]
  5. Fit parts of the same capacitance and at least the same voltage rating.
  6. For the power supply, remove the one-way screws under the rubber feet (retrostuff drilled two small holes in each so that a spanner screwdriver would turn them), discharge 2103, and replace the electrolytics. Keep the safety-marked parts 2101, 2113 and 2114 to Philips's specification.[6][9]
  7. Reassemble, reconnect and run the checks below.

Post-recap checks

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Checks after recapping
Check Expected Source
+5 V at the key ICs (68070 pins 1 and 43, VDSC, CIAP, CALVIN) +5 V ± 10 % Service manual 7.3.1
+5 V at the DSIC2 (7401) and CD60 (7510) +5 V ± 5 % Service manual 7.3.1
System clock at IC 7210 pin 30 30.0000 MHz (PAL) or 30.2098 MHz (NTSC) Service manual 7.3.2
Low Level Test All items pass Service manual 5.1
Service Shell CD drive test IN FOCUS, MOTOR OK, RADIAL TEST OK Service manual 5.3.3

[7][12][13]

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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 Philips Service & Support, Interactive Media Systems, Compact disc interactive player CDI 450/00/05/11/17 service manual, P.S. 0694, 4822 725 24741, section 8.2 Partslist of the mainboard (PCS 72 143 to 72 145): capacitors 2110 to 2526 with code numbers, values and voltages. Hosted as File:Philips CDI 450 Service Manual.pdf.
  2. ↑ 2.0 2.1 2.2 2.3 Philips, CDI 450 service manual, section 6.3 Power supply unit (PCS 72 132): PCB layout and circuit diagram, with the warning triangles on safety components. Hosted as File:Philips CDI 450 Service Manual.pdf.
  3. ↑ 3.0 3.1 3.2 Philips, CDI 450 service manual, section 6.4.2 Mainpanel PCB layout, component side (PCS 72 133): grid index of every designator. Hosted as File:Philips CDI 450 Service Manual.pdf.
  4. ↑ Retrostuff, "NVRAM+RTC Solutions for Philips CD-i Players", 2021, updated 2025 (retrieved 2026-10-20).
  5. ↑ Retrostuff, "Philips CDM 12.1T Laser Sledge Replacement", 27 July 2021 (retrieved 2026-10-20).
  6. ↑ 6.0 6.1 6.2 Retrostuff, "Philips CD-i Power Supply Units", 2024, updated 2026 (retrieved 2026-10-20): warning about the large filter capacitors such as 2103; one-way screws under the rubber feet of the 20PS301.
  7. ↑ 7.0 7.1 Philips, CDI 450 service manual, section 7.3.1 A general check of the main panel (PCS 72 141): supply voltages at the key components. Hosted as File:Philips CDI 450 Service Manual.pdf.
  8. ↑ 8.0 8.1 8.2 Philips, CDI 450 service manual, section 8.3 Partslist of the power supply unit (PCS 72 147): capacitors 2101 to 2207. Hosted as File:Philips CDI 450 Service Manual.pdf.
  9. ↑ 9.0 9.1 9.2 Philips, CDI 450 service manual, cover (PCS 72 118: "Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used") and sections 3.1 to 3.3 with the SMD tool sheet (PDF pp. 6 and 7): safety components are marked with a warning symbol; ESD handling. Hosted as File:Philips CDI 450 Service Manual.pdf.
  10. ↑ Philips, CDI 450 service manual, section 4.1 Exploded view of the cabinet (PCS 72 124). Hosted as File:Philips CDI 450 Service Manual.pdf.
  11. ↑ Retrostuff, "Philips CDI350 Repair Part 3", 24 May 2020 (retrieved 2026-10-20): C938 and C991 soldered with the wrong polarity because the + marks were used as indicators and not the white dots.
  12. ↑ Philips, CDI 450 service manual, section 7.3.2 Test of the clock signals (PCS 72 142). Hosted as File:Philips CDI 450 Service Manual.pdf.
  13. ↑ Philips, CDI 450 service manual, sections 5.1 and 5.3.3 (PCS 72 126 to 72 128): Low Level Test and Service Shell CD drive test. Hosted as File:Philips CDI 450 Service Manual.pdf.


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