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Panasonic N-1005 Capacitor Replacement Guide

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Panasonic FZ-1 power supply schematic
Community drawing of the FZ-1 power section (NTSC US). The ROBO carries an FZ-1 board, but which FZ-1 board, and whether its supply matches this 120 V drawing, has not been recorded.

The ROBO (N-1005) contains a Panasonic FZ-1 with a Video CD module and a five-disc changer.[1][2] Its capacitors are therefore in three places: the FZ-1 main board, which also carries the power supply; the Video CD module; and the changer mechanism with its drive. Panasonic's parts lists cover the FZ-1 main boards. No capacitor list has been published for the ROBO itself, its Video CD module as fitted, or its changer.

Before you start

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  • Pull the mains plug. The ROBO's lead is fixed, and the console is rated AC 100 V, 30 W, 50/60 Hz.[3][4]
  • Read the FZ-1 main board's number (DFUP0576, DFUP0648 or DFUP0649) and use only the matching list on the Panasonic FZ-1 Capacitor Replacement Guide. The lists differ in more than the count.[5]
  • Photograph the changer and the Video CD module, and every cable between them and the FZ-1 board, before removing anything.

FZ-1 main board

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These positions have a known function on the FZ-1 board. Check each on the ROBO's board against the list for its board number.

FZ-1 supply positions with a known function
Ref Value on the FZ-1 Position
C1 6800 µF 25 V Reservoir after the bridge rectifier, about 14.5 V with the console on
C35 1000 µF 6.3 V Output filter of the +5 V switching regulator IC31
C36 10 µF 16 V Soft-start pin of IC31
C631 1000 µF 10 V +9 V output of IC11
C401 22 µF 16 V Back-up controller IC400

[6][7] C35 and C36 are the FZ-1 capacitors that most often leak, and the 3DO Development Repo also lists the RAM capacitors as prone to leaking.[8] Console5 marks C401 on board DFUP0649 as fitted to the Japanese model only, so on a Japanese board such as the ROBO's it should be present; the 3DO Development Repo reports it missing from some FZ-1 boards from the factory and recommends fitting a 22–100 µF part rated 16 V or more where it is absent.[9][8]

The ROBO's power supply runs from 100 V. The community drawing above is of the 120 V U.S. supply; the secondary-side values in the table are on Panasonic's lists for the U.S. boards, and the primary side of a 100 V board has not been documented.[7][3]

Video CD module and changer

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Nothing has been published about the capacitors on the ROBO's Video CD module or its changer, or about which drive the changer uses.[1] Record them before replacing anything:

  1. Photograph each board from directly above, then each capacitor group close up so the printing on the sleeves can be read.
  2. For each electrolytic, write down the designator, capacitance, voltage rating, diameter, height, temperature rating and the side the stripe faces. Note any part marked NP or BP.
  3. If the changer's drive turns out to be an FZ-1 CR-560 drive, compare its board with the CR-560-B drive board list on the FZ-1 guide.[5]

Procedure

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  1. Pull the mains plug and open the case. Label and unplug the cables between the FZ-1 board, the Video CD module and the changer.
  2. Lift out the FZ-1 board. Remove C35 and C36 first and look at the board beneath them; leaked electrolyte here damages the tracks and can block the nearby vias.[8]
  3. Replace each capacitor with one of the same capacitance and at least the same voltage rating, with the stripe on the same side.
  4. Check the backup cell BT400 while the board is out; Panasonic lists it as a CR2354 on every FZ-1 board in its manuals.[10]
  5. Refit the boards and every cable, and set MODE SELECT back to its original position.[4]

After the recap

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With the console on, measure across C1: the FZ-1's technical guide gives about 14.5 V.[6] Then check the picture in mode A, load a game disc from each of the five positions, and play a Video CD. Faults that remain are covered in the Panasonic N-1005 Troubleshooting Guide.

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References

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  1. ↑ 1.0 1.1 Commercial, archive3do.com—link(accessed 2026-10-21) Section "3DO ROBO": "Inside the ROBO is an FZ-1 with a VCD module modified to a 5 disc changer"; photographs of grey and beige units, the rear panel and a boxed unit, credited to the collector Bitrate (AtariAge).
  2. ↑ 3DO, Wikipedia (Japanese)—link(accessed 2026-10-01) Model list, entry "ROBO": a custom FZ-1 made in an edition of 500 by Nicetec, a subsidiary of Futaba Corporation, for supply to love hotels; Video CD adapter fitted as standard; five CDs held in the changer, lifted magnetically. Its source, a page at i-o.no.coocan.jp, is no longer online.
  3. ↑ 3.0 3.1 Rating plate on the rear of a ROBO photographed by archive3do (File:Panasonic N-1005 ROBO rating plate.jpg): "製品名 ROBO, 型式 N-1005, シリアルNo. 20080, AC100V 30W 50/60Hz, 株式会社ナイステック, MADE IN JAPAN".
  4. ↑ 4.0 4.1 Rear panel of a grey ROBO photographed by archive3do (File:Panasonic N-1005 ROBO rear panel.jpg): POWER ON/OFF rocker and fixed mains lead at the left; EXPANSION; MODE SELECT A/B; S-VIDEO OUT; VIDEO OUT; AUDIO OUT R and L; VHF 入力 (input) and 出力 (output); チャンネル切換 (channel switch) CH1/CH2.
  5. ↑ 5.0 5.1 Panasonic FZ-1 Capacitor Replacement Guide on this wiki: board identification (DFUP0576, DFUP0648, DFUP0649) and the parts lists for each main board type, from Panasonic's service manual and supplements and Console5.
  6. ↑ 6.0 6.1 Matsushita Electric Industrial Co. and The 3DO Company, Technical Guide: 3DO Interactive Multiplayer FZ-1, order no. CPD9310013G0, section 3-3 "Power Logic": C1, the reservoir after the bridge rectifier, at about 14.5 V with the console on. Hosted here as File:Panasonic FZ-1 Technical Guide CPD9310013G0.pdf.
  7. ↑ 7.0 7.1 Panasonic 3DO FZ-1 POWER SUPPLY (120V, 30W) schematic diagram (NTSC - US region), one sheet. Community redrawing from the 3DO Development Repo; not a Panasonic document: C36 (10 µF 16 V) on the soft-start pin of IC31, C631 (1000 µF 10 V) on the +9 V output of IC11, C401 (22 µF 16 V) on the back-up controller IC400. Hosted here as File:Panasonic FZ-1 Power Supply Schematic NTSC US.pdf.
  8. ↑ 8.0 8.1 8.2 General Hardware Repair and Maintenance, 3DO Development Repo, 7 November 2022—link(accessed 2026-10-21) Community repair notes: FZ-1 common failures (power supply capacitors C35 and C36, RAM capacitors, drive gear, regulation diode D11, tray belt); mode switch, RF channel switch and region checks.
  9. ↑ Panasonic 3DO FZ-1, Console5 TechWiki—link(accessed 2026-10-01) Capacitor lists for main boards DFUP0576ZAM2/M3, DFUP0648ZA M and DFUP0649ZAM3 and for the CD-ROM drive board CR-560-B; C401 on DFUP0649 marked as fitted to the Japanese model only. Secondary source, summarised on this wiki's Panasonic FZ-1 Capacitor Replacement Guide.
  10. ↑ Matsushita Electric Industrial Co., Service Manual: 3DO Interactive Multiplayer FZ-1, order no. CPD9309012C0, and supplements CPD9311017S1 and IMD9411005S1, replacement parts lists: BT400, CR2354 lithium cell, on all three main board types. Hosted here; see Panasonic FZ-1 Documentation.



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