Altec Lansing ADA885 9-pin jumper start, no power-on pinout

User question

как запустить перемычкой через 9pin ADA885

Artificial Intelligence Response

Direct answer to the question

If you mean Altec Lansing ADA885 and want to “start it with a jumper through the 9‑pin connector,” the safe answer is:

Do not randomly short pins on the 9‑pin connector. There is no reliable public pinout or confirmed simple jumper method for starting the ADA885 through that connector.

The 9‑pin connector is very likely not just a simple “power-on” contact. On this type of Altec Lansing system, the control speaker/front control module is part of the power, volume, mute, and mode-control system. In related ADA88x/ADA89x documentation, “control speaker disconnected” is explicitly listed as a cause of no indicators/no sound, and operation requires the power/control interface to be active. (m.media-amazon.com)

Detailed problem analysis

The common mistake is to treat the 9‑pin connector like:

• an ATX power-supply “paperclip” start,
• a simple DB9 RS‑232 loopback,
• or a basic speaker/audio connector.

For the ADA885, that is risky. The 9‑pin connector may carry a mixture of:

• low-voltage supply lines, for example +5 V logic supply,
• ground,
• audio signals,
• control/data lines,
• mute/standby control,
• possibly speaker or internal routing signals depending on revision.

If you short the wrong pins, you can easily short:

• +5 V to ground,
• supply voltage to a logic input,
• audio output to signal ground,
• control/data line to power,
• or amplifier mute/standby circuitry to the wrong potential.

That can damage the logic board, preamp/DSP section, or amplifier stage.

There are forum repair reports for ADA885/ADA890 systems showing that these units contain internal power-supply, relay, amplifier, and control circuitry rather than a simple passive speaker connection. One ADA885 repair discussion also notes that without proper documentation or schematic data, troubleshooting is difficult. (computerforum.com)

What you should not do

Do not do this:

Pin X ---- jumper ---- Pin Y

unless you already know exactly which pin is:

• ground,
• power-on input,
• logic-level control input,
• audio input,
• supply output,
• and the correct active level.

Also, do not use standard DB9 RS‑232 jumper assumptions such as:

4 to 6
7 to 8

Those are for serial-port handshaking and are not valid for an Altec Lansing speaker/subwoofer control connector.

Practical options

Option 1: Use or repair the original control speaker/module

This is the best solution.

If you still have the original right/front control speaker but the cable or connector is broken, repair the cable as a straight-through 9‑pin connection, pin-to-pin, including shield/ground if present.

Do not change the wiring order unless you have traced it.

Option 2: Identify the pinout by measurement

If you are experienced with electronics and have a multimeter:

1. Disconnect the unit from AC mains.
2. Open the subwoofer only if you are qualified to work near mains-powered equipment.
3. Trace the 9‑pin connector to the PCB.
4. Identify:
   • chassis/ground,
   • logic ground,
   • regulated +5 V,
   • any +12 V or other supply rails,
   • audio input traces,
   • microcontroller/control traces.
5. Only after identifying the actual circuit should you test any “power-on” or “mute” input.

A safer test method, if a low-voltage logic input is found, is to use a resistor such as:

1 kΩ to 4.7 kΩ

instead of a direct wire jumper. But even this should only be done after confirming the pin function and voltage.

Option 3: Internal amplifier bypass

If the original control speaker/module is missing and you only want to reuse the subwoofer/amplifier, the realistic method is usually an internal bypass, not a 9‑pin jumper.

This means:

• locate the power amplifier ICs,
• identify their mute/standby pins from the datasheet,
• force the amplifier out of mute/standby correctly,
• inject analog audio directly before the amplifier input stage,
• provide your own volume control or preamp.

This requires soldering, tracing, and understanding of the amplifier board. The ADA885/ADA890 repair discussions show that these systems contain internal relay/amplifier circuitry and can require board-level work to restore or modify. (computerforum.com)

Safety warning

The ADA885 subwoofer contains a mains power supply. Inside the unit there may be:

• 120/230 VAC mains,
• charged filter capacitors,
• transformer secondary rails,
• amplifier supply voltages high enough to damage components or injure you.

Before opening:

Unplug from mains.
Wait for capacitors to discharge.
Verify with a multimeter.
Do not work powered unless you know exactly what you are doing.

What I need from you to give a more exact answer

Please provide one of these:

1. A photo of the 9‑pin connector on the ADA885.
2. A photo of the inside PCB where the 9‑pin connector wires go.
3. Wire colors from the 9‑pin cable.
4. Confirmation whether you have the original control speaker/front module.
5. Your goal:
   • “I want to turn the system on without the control speaker”
   • “I want to repair the broken 9‑pin cable”
   • “I want to use only the subwoofer”
   • “I want to connect audio directly”

Brief summary

For the Altec Lansing ADA885, there is no safe universal “jumper these two 9‑pin pins” answer. The 9‑pin connector is likely part of the control/audio/power interface, not a simple power switch. Random shorting can destroy the electronics. The proper approach is to repair/use the original control module, trace the pinout with a meter, or perform an internal amplifier bypass if you want to use the unit without the original control speaker.

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.