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Grandstand Match of the Day 2000 Capacitor Replacement Guide

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Grandstand Adman TV Game 2000 (7)
What a failed electrolytic can do: a SAMHWA 470 µF 16 V capacitor that burst inside a Grandstand TV Game 2000, the other four-game black-and-white Grandstand console, with the resistor it knocked loose. It is not from a Match of the Day 2000.

The Grandstand Match of the Day 2000 is a compact black-and-white Pong console with a large central speaker, made in Hong Kong for Adam Imports.[1] No photograph of its board, no parts list and no schematic has been published, so no capacitor values for the Match of the Day 2000 are known. What follows is what can be said without them: where its electrolytics are likely to matter, how to record the ones on your own board, and how to replace them. Anyone who opens one can add the first real parts list by photographing the board and noting each value.

Opening the case is covered on Grandstand Match of the Day 2000 General Maintenance; symptoms are on Grandstand Match of the Day 2000 Troubleshooting Guide.

What is known

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Match of the Day 2000 capacitor information
Item Status Source
Board photograph None published; the collector's photographs show the outside, base and controllers only [1]
Parts list or schematic None found None found
Electrolytic values None published None found
Game chip Not confirmed; the four games and the options match the AY-3-8500 [2][3]
Picture Black and white only, so there is no colour encoder to worry about [4]

General Instrument's reference circuit for the AY-3-8500 uses no electrolytic capacitors around the chip itself: the bat inputs take 0.1 µF each, the sound driver 0.2 µF and the reset line 0.01 µF.[5] The electrolytics on a console of this kind are therefore most likely to be in the power supply and the RF stage. The chip needs +6 to +7 V;[3] if the cell compartment holds more than that, the board will have a stage that drops the supply for the chip, and its filter capacitors are the ones to check first. The large speaker is driven from the board,[1] and a driver stage feeding a speaker of this size may have a coupling or supply capacitor of its own.

For comparison only: the Grandstand TV Game 2000, the other four-game black-and-white Grandstand console, is Korean-made on a Texas Instruments chip, and one example lost a 470 µF 16 V electrolytic that burst.[6] That is a different board, and none of its values should be assumed for the Match of the Day 2000.

Recording your own board

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  1. Remove the cells and lift both controller pods out of their recesses.
  2. Remove the two front-corner screws in the base and check the rear openings and the battery compartment for more, as described on the maintenance page.[7]
  3. Before lifting the board, photograph it on both sides, along with the leads to the speaker, the two pods, the rear power socket and the RF lead.
  4. Find every electrolytic: the cylindrical parts with a stripe marking the negative lead.
  5. For each, write down its position (next to the regulator, the RF can, the speaker leads, the chip), its capacitance, voltage and temperature rating, the maker's name and the stripe's direction.
  6. Record the game chip's markings, the crystal, the RF modulator and any board number while you are there.

Signs of trouble

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  • A bulging or leaking can, a split sleeve, or brown deposits around a capacitor's leads.
  • A supply that sags at switch-on, or a current draw far above the 60 mA maximum GI gives for the chip.[3]
  • Hum bars, a rolling or tearing picture, or a buzz from the speaker once the television, the cells and the contacts have been ruled out. See Capacitor Failure Symptoms for the general signs.

Replacing the capacitors

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  1. Change one capacitor at a time, so that each new part goes back where the old one came from.
  2. Desolder from the solder side with a pump or braid, and do not linger on a pad: the copper on a board of this age lifts easily.
  3. Fit a radial electrolytic of the same capacitance and the same or a higher voltage rating, rated 105 °C, with the stripe on the same side. Match the lead spacing so that it sits flat.
  4. Keep the leads short near the crystal and the RF modulator.
  5. Clean the board with isopropyl alcohol and check the tracks under any capacitor that had leaked.
  6. Check the speaker, pod and power-socket leads before closing the case; they are easily pulled while the board is out.
  7. Power up from a current-limited supply before connecting the television.
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  • Soldering iron with temperature control, solder wick or a pump, flux, isopropyl alcohol.
  • Multimeter; a capacitance or ESR meter to test the parts you remove.
  • Replacement radial electrolytics rated 105 °C (Nichicon, Panasonic, Rubycon or a similar maker).

Checks after recapping

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After recapping a Match of the Day 2000 (AY-3-8500 values; confirm the chip first)
Check Expected Source
Chip pin 4 to pin 2 +6 to +7 V [3]
Pin 17 clock 2.012160 MHz ±1% [3]
Picture Black and white, on UHF channel 36 ±5 [7][4]
Play All four games on the slider; both bats move smoothly; sound from the speaker on hits and scores [2]
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References

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  1. ↑ 1.0 1.1 1.2 Ian Hill, "Grandstand Match of the Day 2000", Ian's Retro Museum (retrieved 2026-10-19): nine photographs of a complete example (box, panel, base with the battery cover on and off, controllers, rear, RF plug), none of the inside; "quite small, but is dominated by the large centre speaker".
  2. ↑ 2.0 2.1 Ian Hill, Ian's Retro Museum, Match of the Day 2000 page, photographs of the panel read at full size (retrieved 2026-10-19): slider TENNIS, HOCKEY, SQUASH, PRACTICE; switches POWER, BAT SIZE, SPEED, ANGLE, SERVE; START and MAN. buttons; central speaker grille.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 General Instrument Corporation, GIMINI TV Game Circuits, January 1978, p. 6, PDF hosted by Pong-Story (retrieved 2026-10-19). AY-3-8500: four bat-and-ball games and two rifle games; option inputs for ball angles, ball speed, manual serve and bat size; VCC +6 to +7 V; supply current 40 mA typical, 60 mA maximum at +7 V; clock 2.012160 MHz ±1% on pin 17.
  4. ↑ 4.0 4.1 Ian Hill, Ian's Retro Museum, Match of the Day 2000 page, photographs of the box read at full size (retrieved 2026-10-19): "Plays in black & white on all 625 line UHF TV's"; "Battery or AC operation".
  5. ↑ General Instrument Corporation, GIMINI TV Game Circuits, January 1978, p. 5, AY-3-8500 system diagram, PDF hosted by Pong-Story (retrieved 2026-10-19): 0.1 µF on each bat input, 0.2 µF with 15 kΩ in the 2N2222 speaker driver, 0.01 µF on the reset line; no electrolytic capacitor in the circuit around the chip.
  6. ↑ Photograph by José Antonio Ortigueira Amor, File:Grandstand Adman TV Game 2000 (7).jpg (CC BY 4.0, from Wikimedia Commons), examined at full size: a burst SAMHWA electrolytic marked "470µF16V" and a resistor with a charred body from a TV Game 2000; see Grandstand TV Game 2000 for that console's Korean origin and Texas Instruments TMS1965 chip.
  7. ↑ 7.0 7.1 Ian Hill, Ian's Retro Museum, Match of the Day 2000 page, photographs of the base read at full size (retrieved 2026-10-19): a screw in a recess at each front corner; two square openings at the rear corners; battery compartment; sticker "CHANNEL 36 ±5".


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