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Philips VG-8010 Capacitor Replacement Guide

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Philips VG-8010 inside
VG-8010 main board and PAL encoder board; the encoder board at the lower left carries most of the electrolytics

The electrolytic capacitors of the Philips VG-8010 and its VU-0022 supply are drawn on the circuit diagrams in Philips's service manual for the VG 8000 and VG 8010. Its parts lists give values for only some of them: C827, C847, C849 and C862 (10 µF, 50 V) on each encoder board, and C196, C197, C200 and C203 in the supply.[1] The other values below are read from the diagrams, where a letter beside each electrolytic gives its voltage rating: c = 6.3 V, d = 10 V, e = 16 V, f = 25 V, g = 40 V, h = 63 V.[2]

VU-0022 supply

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Philips VU-0022 power supply circuit diagram
VU-0022 circuit diagram
VU-0022 electrolytics (VG 8000 / VG 8010 service manual)
Ref Value Voltage Position
C196, C197 22 µF 385 V Mains reservoirs after the BYW55 bridge, about 310 V
C194 680 µF f (25 V) Supply to the TEA1039 controller
C195 22 µF g (40 V) TEA1039 pin 2
C198 47 µF f (25 V) Auxiliary winding, after D184
C203 4700 µF 10 V +5 V reservoir after D189
C201 330 µF d (10 V) +5 V output after the choke S210; R168 sets 5 V across it
C200 330 µF not given +12 V reservoir after D187
C199 220 µF e (16 V) +12 V output after the choke S209
C204 150 µF f (25 V) -12 V reservoir after D186
C205 47 µF f (25 V) -12 V output after R159

[1][3]

C203

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In the VG 5000 Bazar repairs of this supply, C203 had failed short in all three dead units: it was warm, the +5 V output was erratic and the +12 V output was below 7 V. Replacing it repaired all three.[4]

  1. Unplug the supply and open it (four screws in the corner wells), as on Philips VG-8010 General Maintenance.
  2. Fit 4700 µF at 10 V or higher. The original is axial, 16 mm in diameter and 32 mm long. A radial part also fits if you clear the two spare solder-filled holes the board has for it.
  3. The positive lead goes to the hole furthest from the ground, +12 V and +5 V wires.
  4. Measure the outputs before reconnecting the computer: about +5.2 V, +11 V and -11.4 V on a working supply.

[4] The same procedure, with photographs described, is on Philips VG-5000 Capacitor Replacement Guide, since the VG-5000 uses this supply.

Main board

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Main board electrolytics (circuit diagrams)
Ref Value Voltage Position
C832, C834 150 µF c (6.3 V) +5 V at the power connector
C833, C835 68 µF e (16 V) +12 V at the power connector, either side of L461
C836 68 µF e (16 V) -12 V at the power connector
C837 68 µF printed c (6.3 V); see note -12 V, after L462
C828 150 µF c (6.3 V) +5 V at the video RAM
C829 150 µF c (6.3 V) +5 V at the keyboard decoder IC698
C830, C831 150 µF c (6.3 V) +5 V decoupling

[5]

Note on C837: the diagram marks it with c (6.3 V) although it sits on the -12 V rail, while its partner C836 on the same rail is marked e (16 V). A 6.3 V part there would be over-voltage; read the part on your board and fit at least 16 V.[5][2]

The 32K RAM board, fitted only to the VG-8010, has one electrolytic, C810 (68 µF, c, 6.3 V), on its +5 V supply.[5]

Encoder board

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PAL encoder electrolytics, VG-8010/00
Ref Value Voltage Position
C827, C847, C849 10 µF 50 V (parts list) Sound inputs to the mixer TS355
C862 10 µF 50 V (parts list) Listed in the parts list
C824 47 µF d (10 V) Sound input from port C bit 7 of the 8255
C826 100 µF d (10 V) Sound output from TS355
C838 150 µF c (6.3 V) +5 V to the UHF modulator
C864, C865 100 µF d (10 V) TDA2501 reference supply (zener diodes D352 and D351)
C821 100 µF d (10 V) Chroma output coupling
C867 150 µF c (6.3 V) +5 V input to the board, after L465
C839 68 µF e (16 V) +12 V input to the board
C812 10 µF not legible Cassette input comparator IC665

[1][6]

The /19's RGB encoder board uses the same sound inputs (C824 47 µF; C827, C847 and C849 10 µF; C826 100 µF) and has C587 (1 µF, h, 63 V) on its +12 V input. Its parts list also gives C862 as 10 µF 50 V.[1][7] Read the remaining values from the board.

Which to replace first

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  1. C203 in the VU-0022, if the supply shows the symptoms above or is untested. Then the other supply electrolytics.[4]
  2. The supply filters on the main board (C832 to C837) and on the encoder board (C867, C839).
  3. The encoder board capacitors if the picture is poor. One owner found that recapping the supply, main board and encoder board made a shaking picture steadier, but the VG-8010's video stays noisier than most MSX machines.[8][9]
  4. The audio coupling capacitors (C824, C826, C827, C847, C849) if the sound is weak or distorted.

General advice on MSX recapping from the MSX Resource Center forum is to replace the main supply capacitors whatever their condition and to replace one capacitor at a time.[10]

After the recap

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  1. With the computer disconnected, check the supply outputs and set R168 for 5 V across C201.[11]
  2. Connect the computer and check the picture in colour and the sound. On the /00, check the PAL clock (C900) if the colours are wrong.[11]

Remaining faults are covered in the Philips VG-8010 Troubleshooting Guide.

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References

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  1. ↑ 1.0 1.1 1.2 1.3 Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, PDF page 12, external power supply parts list: C196 and C197 22 µF 385 V (4822 124 21306), C200 330 µF (4822 124 21503), C203 4700 µF 10 V (4822 124 21408); PDF pages 13 and 14, PAL and RGB encoder parts lists: C827, C847, C849 and C862 10 µF 50 V (4822 124 40435). The list writes "mF" for µF. Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.
  2. ↑ 2.0 2.1 Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, PDF page 17, symbols used in circuit diagrams (34 498 A12): miniature single electrolytic (-10 % +50 %) and single-ended electrolytic (±20 %), voltage note a = 2.5 V, b = 4 V, c = 6.3 V, d = 10 V, e = 16 V, f = 25 V, g = 40 V, h = 63 V. Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.
  3. ↑ Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, PDF page 11, external power supply unit circuit diagram (36498 C12): C196 and C197 22 µF after D224 to D227 (BYW55), 310 V; C194 680 µF (f) on the 18 V supply to IC192 (TEA1039) pin 9; C195 22 µF (g) on pin 2; C198 47 µF (f) after D184 (BAV10); C203 4700 µF and C201 330 µF (d) on the 5 V output with S210; C200 330 µF and C199 220 µF (e) on +12 V with S209; C204 150 µF (f) and C205 47 µF (f) on -12 V with R159. Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.
  4. ↑ 4.0 4.1 4.2 VG 5000 Bazar, "Dépanner une alimentation VU-0022", version 1.0 of 17 March 2018, revised 3 February 2025. http://vg5000bazar.free.fr/html/depannage/vu0022.htm In French. Three failed supplies with the 4700 µF capacitor beside the output cable hot and short-circuited, erratic +5 V and +12 V below 7 V; replacement with a 4700 µF 10 V capacitor, preferably axial and of the original size (16 mm diameter, 32 mm long); a radial part also fits if the two spare solder-filled holes on the board are cleared; the positive lead goes to the hole furthest from the ground, +12 V and +5 V wires; working supply about +5.2 V, +11 V, -11.4 V; two board versions, the later one (from mid-November 1984) with one large reservoir capacitor.
  5. ↑ 5.0 5.1 5.2 Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, circuit diagrams: PDF page 20, C830 and C831 150 µF (c) on +5 V; page 21, power input with C832 and C834 150 µF (c), C833 and C835 68 µF (e) with L461 on +12 V, C836 68 µF (e) and C837 68 µF (marked c) with L462 on -12 V, C828 150 µF (c) at the video RAM; page 24, C829 150 µF (c) at IC698; page 25, the 32K RAM board with C810 68 µF (c) on +5 V. Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.
  6. ↑ Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, PDF page 19, PAL/CVBS encoder U100-A: C824 47 µF (d) from PC7 through R233; C849, C847 and C827 10 µF from SONIN1, SONIN2 and SONIN3 to TS355 (BC548B); C826 100 µF (d) at the TS355 output to SOUND; C838 150 µF (c) and C801 4.7 nF on +5 V to the RF modulator U101; IC721 TDA2501 with D352 (BZX79C 3V3) and D351 (BZX79C 2V7), C864 and C865 100 µF (d); C821 100 µF (d) after R261; L465 with C804 and C867 150 µF (c) on +5 V; C803 and C839 68 µF (e) on +12 V. PDF page 25, U100-B: IC665 LM311 with C818 22 nF and C812 10 µF. Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.
  7. ↑ Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, PDF page 26, R-G-B encoder U100-A: C824, C849, C847, C827 and C826 on the sound inputs; C587 1 µF (h) on +12 V; C592 68 nF (not an electrolytic). Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.
  8. ↑ Philips VG-8010 with bad video quality, November and December 2023—link(accessed 2026-10-21) mjnman replaced all the electrolytic capacitors in the supply, the main board and the PAL encoder board of a VG-8010; the picture became more stable but the colours were wrong, which turned out to be broken pins between the main board and the encoder board.
  9. ↑ VG8010/00 - Video noise and power up trouble, April to November 2023—link(accessed 2026-10-21) Recapping the VU-0022 reduced video noise on one VG-8010/00; sdsnatcher73: poor video on the VG8000 and VG8010 is a design issue, not only capacitors.
  10. ↑ Recap recommendations, June 2018—link(accessed 2026-10-21) RetroTechie, 23 June 2018: capacitors in the main power supply are worth replacing whatever their condition; bypass capacitors elsewhere on the board rarely matter; audio and video capacitors show their condition in the output; replace capacitors one at a time; buy Rubycon, Chemi-Con, Nichicon or Panasonic parts from established distributors.
  11. ↑ 11.0 11.1 Philips, Service Manual, Home computer VG 8000/00/19/20, VG 8010/00/19, PDF page 2: R168 for 5 V across C201; on the /00, C900 for 4.433619 MHz at pin 3 of IC721. Hosted as File:Philips VG-8000 VG-8010 Service Manual.pdf.



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