ColecoVision Roller Controller Troubleshooting Guide
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Fault-finding for the ColecoVision Roller Controller. Coleco's owner's manual lists three faults. Beyond those, the checks below follow the circuit as two independent schematic redrawings show it, together with the console's own spinner interface checks.[1][2][3] Connection and care are on ColecoVision Roller Controller General Maintenance.
Coleco's troubleshooting chart
[edit | edit source]| Symptom | Remedy |
|---|---|
| Snow on the screen | Make sure both power supply connections are secure: the adapter plug in the console and the supply's jack in the adapter |
| No response from the hand controllers | Set the mode switch to JOYSTICK cartridge |
| Roller responds backwards | Check that the WYE cable jacks are in the correct console sockets: jack 1 in the rear socket, jack 2 in the front |
Chart and connection details from Coleco's manual.[1]
Nothing responds
[edit | edit source]- Check the mode switch. Roller games need ROLLER; joystick games need JOYSTICK.[1]
- Check the power path. The Roller Controller's logic runs from +5 V taken from the console's supply through the adapter plug, on a black-and-white lead with a black ground lead.[1][2] With the console on, measure between those two leads at the board.
- On an Adam, the Roller Controller needs Coleco's ADAM adapter in the memory console's POWER socket, with the Roller Controller in its ACCESSORY outlet.[1][4]
- Try a Super Action Controller or another spinner device if you have one. If no spinner works on either port, the fault is in the console: Coleco's tip for a dead spinner interface is to replace U24 if it is a Texas Instruments part, and its sheet 15 chart works through U7, U24 and the parts around them. See ColecoVision Troubleshooting Guide.[5]
One direction or one axis dead
[edit | edit source]Each axis has its own sensor and its own input chip: OS1 and U1 for north-south, OS2 and U6 for east-west, both 4093 Schmitt NAND gates.[2][3] That makes the working axis a reference for the dead one.
- Check that both channels of the dead axis's photo-interrupter produce a clean square wave as you turn the ball, and that its LED is being fed through its 100 Ω resistor.[2][3]
- Follow the two channels through the 4093 gates (U1 or U6) and compare them with the same pins on the working axis.[2]
- If the axis works in one direction only, the direction circuit is suspect: the 4013 flip-flops in U2, which compare the two channels, and the 4528 monostables in U5.[2][3]
- Swapped WYE jacks also reverse the response, which is the first thing Coleco's chart checks.[1]
Hand controllers or action buttons not working
[edit | edit source]- With the mode switch on JOYSTICK, the hand controllers in the wells should work. Their signals pass through the input mixers, 4081 AND and 4071 OR gates (U7 to U10), on the way to the console.[1][3]
- On Tomlin's diagram the lines from the hand controller connectors also carry four 6.2 V zener diodes, VR1 to VR4.[2]
- The four action buttons are SW5 to SW8.[2]
Snow on the screen
[edit | edit source]Coleco's chart treats snow as a power connection fault: reseat the adapter plug in the console and the supply's jack in the adapter.[1] The console's own power checks are on ColecoVision Troubleshooting Guide.
Related pages
[edit | edit source]- ColecoVision Roller Controller
- ColecoVision Roller Controller General Maintenance
- ColecoVision Roller Controller Capacitor Replacement Guide
- ColecoVision Troubleshooting Guide
References
[edit | edit source]- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Coleco Industries, Roller Controller Owners Manual, model 2492, Guide No. 91950, 1983: hooking up (WYE connector jacks 1 to the rear socket and 2 to the front socket, the power adapter plug in the console's power supply socket, the console supply's jack in the back of the adapter plug, the mode switch with ROLLER and JOYSTICK cartridge positions), p. 2; troubleshooting chart, p. 4; Supplement No. 14310, connecting to the ADAM through the ADAM adapter. Hosted here as File:ColecoVision Roller Controller Owners Manual Guide 91950.pdf.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Bruce Tomlin, Colecovision Roller Controller schematic, revision B, 24 March 2004, published by ColecoVision.dk (retrieved 2026-10-19): optical sensors OS1 (N-S) and OS2 (E-W), each with its LED fed through a 100 Ω 1/2 W resistor, into U1 and U6 (4093); U2 (4013) and U5 (4528, with 2.2 µF timing capacitors) for direction and pulse timing; U3 (4093); U4, U7 and U9 (4081); U8 and U10 (4071); the JOY/ROL mode switch; action buttons SW5-SW8; 6.2 V zener diodes VR1-VR4 on the lines from the hand controller connectors J1 and J2; all chips on +5 V from the BLK/WHT lead.
- ↑ 3.0 3.1 3.2 3.3 3.4 Roller Controller, seven-sheet KiCad redrawing, author not recorded, from the colecovisionadam.com Documents page (retrieved 2026-10-19): N-S and E-W sense sheets (two-channel photo-interrupters OS1A/B and OS2A/B, R1 100 Ω, HEF4093B gates producing raw left, raw right, direction and interrupt signals); the translator sheet (4013 flip-flops U2 and 4528 monostables U5 producing joystick-direction outputs through U3); the mode switch sheet; input mixers 1 and 2 (4081 and 4071 gates). Hosted here as File:ColecoVision Roller Controller schematic (KiCad redraw).pdf.
- ↑ Wikipedia, "ColecoVision" (retrieved 2026-10-19), used for history only: the Roller Controller's power connector not compatible with Expansion Module #3, and Coleco mailing an adapter to owners of both who complained.
- ↑ Coleco Industries, ColecoVision Technical Manual: the spinner interface, p. III-6; technical tip "Bad Spinner Interface" (replace U24 if it is a Texas Instruments IC), p. VIII-1; flow chart sheet 15 (spinner interface), pp. VI-26 and VI-27. Hosted here as File:ColecoVision Repair Manual.pdf.