Optimus STA-3500 User Manual (English)

Questions and Answers:

Q
qevansJul 29, 2025
What to do if my Optimus STA-3500 Receiver has no sound?
- K
  Kelly DeleonJul 29, 2025
  If your Optimus Receiver isn't producing any sound, here's what you can check: * Ensure all connections are correctly made. * Deactivate the mute function by pressing the MUTING button. * Increase the volume. * Verify speaker wires are securely connected. * Make sure either SPEAKERS A or B is selected, but not both if only one set of speakers is connected. If both SPEAKERS A and B are pressed when only one set of speakers is connected, press the SPEAKERS button again for the terminals that have no speakers. * Ensure TAPE 2 MONITOR is not selected by pressing the TAPE 2 MONITOR button again.
T
tandersonAug 4, 2025
Why isn't my Optimus STA-3500 remote control working?
- B
  brentalvarezAug 4, 2025
  If the remote control for your Optimus Receiver isn't working, consider these potential causes: * Dead or missing batteries: Install fresh batteries. * Angle or distance: Use the remote within 23 feet and within a 30-degree angle of the remote sensor window. * Obstacles: Remove any obstacles between you and the remote sensor window. * Remote control cord: For CD players and cassette decks, ensure the remote control cord is connected. * Fluorescent light: Turn off any fluorescent lights shining on the remote sensor window.
L
longdebraAug 8, 2025
How to reduce noise level on Optimus Receiver?
- S
  samueljacksonAug 8, 2025
  If you're experiencing a high noise level with your Optimus Receiver, here are a few things to try: * Tune to a stronger station. * Connect the antenna. * If using an FM antenna, stretch both ends taut and reposition it. If using an AM loop antenna, adjust its direction. * If the noise is coming from another electrical appliance, try using an AC line noise filter.
C
Carrie WilliamsAug 13, 2025
What to do if sound comes from only one speaker on my Optimus STA-3500?
- M
  Maurice ButlerAug 13, 2025
  If sound is only coming from one speaker on your Optimus Receiver, check the following: * Ensure all speaker wires and input cords are properly connected. * Make sure the BALANCE is set to the center position.
B
Bradley BellAug 19, 2025
Why doesn't my Optimus STA-3500 remote control the cassette deck or CD player?
- N
  Nicholas DorseyAug 19, 2025
  If the remote for your Optimus Receiver isn't controlling the cassette deck or CD player, it might be due to the following reasons: * Compatibility: This feature only works with Optimus Professional Series components. * Control cable: Ensure the control cable is properly connected. * Audio cables: Ensure the audio cables are properly connected.
W
William HernandezAug 23, 2025
Why does my Optimus Receiver tuning not automatically stop?
- P
  pharrisonAug 23, 2025
  If the tuning on your Optimus Receiver doesn't automatically stop when searching for FM stations, it could be because the stations are too weak. Try using a better antenna.

Optimus STA-3500 Specifications

General

Type	Stereo Receiver
Tuning range	FM, MW
Frequency Response	20Hz to 20kHz
Impedance	8 ohms
Input sensitivity	2.5mV (MM), 150mV (line)
Speaker load impedance	8Ω to 16Ω